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WO2016207347A1 - Article d'emballage comprenant une enveloppe et une composition de coloration, de blanchiment ou d'oxydation anhydre comprenant une argile fibreuse, et un composé choisi parmi un agent colorant et/ou un agent oxydant ; utilisation et procédé de coloration et/ou de blanchiment de fibres de kératine - Google Patents

Article d'emballage comprenant une enveloppe et une composition de coloration, de blanchiment ou d'oxydation anhydre comprenant une argile fibreuse, et un composé choisi parmi un agent colorant et/ou un agent oxydant ; utilisation et procédé de coloration et/ou de blanchiment de fibres de kératine Download PDF

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Publication number
WO2016207347A1
WO2016207347A1 PCT/EP2016/064661 EP2016064661W WO2016207347A1 WO 2016207347 A1 WO2016207347 A1 WO 2016207347A1 EP 2016064661 W EP2016064661 W EP 2016064661W WO 2016207347 A1 WO2016207347 A1 WO 2016207347A1
Authority
WO
WIPO (PCT)
Prior art keywords
fibres
composition
chosen
envelope
dyes
Prior art date
Application number
PCT/EP2016/064661
Other languages
English (en)
Inventor
Chrystel POURILLE
Original Assignee
L'oreal
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by L'oreal filed Critical L'oreal
Publication of WO2016207347A1 publication Critical patent/WO2016207347A1/fr

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/02Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/0208Tissues; Wipes; Patches
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/02Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/0216Solid or semisolid forms
    • A61K8/022Powders; Compacted Powders
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/18Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/19Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
    • A61K8/22Peroxides; Oxygen; Ozone
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/18Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/73Polysaccharides
    • A61K8/731Cellulose; Quaternized cellulose derivatives
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/18Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/81Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • A61K8/8129Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers or esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers, e.g. polyvinylmethylether
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61QSPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q5/00Preparations for care of the hair
    • A61Q5/06Preparations for styling the hair, e.g. by temporary shaping or colouring
    • A61Q5/065Preparations for temporary colouring the hair, e.g. direct dyes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61QSPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q5/00Preparations for care of the hair
    • A61Q5/08Preparations for bleaching the hair
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61QSPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q5/00Preparations for care of the hair
    • A61Q5/10Preparations for permanently dyeing the hair
    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45DHAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D19/00Devices for washing the hair or the scalp; Similar devices for colouring the hair
    • A45D19/0041Processes for treating the hair of the scalp
    • A45D19/0066Coloring or bleaching
    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45DHAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D2200/00Details not otherwise provided for in A45D
    • A45D2200/05Details of containers
    • A45D2200/058Means for mixing different substances prior to application
    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45DHAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D2200/00Details not otherwise provided for in A45D
    • A45D2200/10Details of applicators
    • A45D2200/1009Applicators comprising a pad, tissue, sponge, or the like
    • A45D2200/1036Applicators comprising a pad, tissue, sponge, or the like containing a cosmetic substance, e.g. impregnated with liquid or containing a soluble solid substance
    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45DHAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D2200/00Details not otherwise provided for in A45D
    • A45D2200/10Details of applicators
    • A45D2200/1009Applicators comprising a pad, tissue, sponge, or the like
    • A45D2200/1036Applicators comprising a pad, tissue, sponge, or the like containing a cosmetic substance, e.g. impregnated with liquid or containing a soluble solid substance
    • A45D2200/1045Applicators comprising a pad, tissue, sponge, or the like containing a cosmetic substance, e.g. impregnated with liquid or containing a soluble solid substance with one or more internal reservoirs, e.g. rupturable microcapsules
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/20Chemical, physico-chemical or functional or structural properties of the composition as a whole
    • A61K2800/30Characterized by the absence of a particular group of ingredients
    • A61K2800/31Anhydrous
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/80Process related aspects concerning the preparation of the cosmetic composition or the storage or application thereof
    • A61K2800/87Application Devices; Containers; Packaging

Definitions

  • Packaging article comprising an envelope and an anhydrous dyeing, bleaching or oxidizing composition comprising a fibrous clay, and a compound chosen from a colouring agent and/or an oxidizing agent; use and process for dyeing and/or bleaching keratin fibres
  • the present invention relates to a packaging article for dyeing and/or bleaching keratin fibres, in particular human hair, comprising an oxidation dye precursor, and/or a direct dye for dyeing and/or an anhydrous chemical oxidizing agent.
  • oxidizing compositions are generally used in the fields of dyeing, bleaching and permanently reshaping keratin fibres, and in particular human keratin fibres such as the hair.
  • bleaching compositions contain one or more oxidizing agents.
  • oxidizing agents the ones most conventionally used are hydrogen peroxide or compounds that are capable of producing hydrogen peroxide by hydrolysis, such as urea peroxide or persalts such as perborates, percarbonates and persulfates, hydrogen peroxide and persulfates being particularly preferred.
  • compositions may be aqueous compositions containing alkaline agents (amines or aqueous ammonia) that are diluted at the time of use with an aqueous hydrogen peroxide composition.
  • alkaline agents amines or aqueous ammonia
  • compositions may also be formed from anhydrous products, which are powders or pastes, and which contain alkaline compounds (amines and/or alkaline silicates), and a peroxygenated reagent such as ammonium or alkali metal persulfates, perborates or percarbonates, which is diluted at the time of use with an aqueous hydrogen peroxide composition.
  • alkaline compounds amines and/or alkaline silicates
  • a peroxygenated reagent such as ammonium or alkali metal persulfates, perborates or percarbonates
  • bleaching powders have a tendency to form dust during their handling, transportation and storage.
  • alkali metal persulfates and silicates are aggressive and in particular irritant to the eyes, the respiratory pathways and mucous membranes.
  • pastes just like powders, nevertheless require certain precautions during their handling, in particular as regards weighing them out in order to mix them with the oxidizing composition, so as to avoid staining clothing.
  • oxidation bases such as ortho- or para-phenylenediamines, ortho- or para-aminophenols and heterocyclic compounds.
  • oxidation bases are initially colourless or weakly coloured compounds, which, when combined with oxidizing products, may give rise to coloured compounds via a process of oxidative condensation.
  • oxidation bases can be varied by combining them with couplers or colouration modifiers, the latter being chosen in particular from aromatic meta-diamines, meta-aminophenols, meta-diphenols and certain heterocyclic compounds, such as indole compounds.
  • couplers or colouration modifiers the latter being chosen in particular from aromatic meta-diamines, meta-aminophenols, meta-diphenols and certain heterocyclic compounds, such as indole compounds.
  • couplers or colouration modifiers the variety of the molecules used as oxidation bases and couplers allows a wide range of colours to be obtained.
  • the permanent dyeing process thus consists in applying, to the keratin fibres, bases or a mixture of bases and couplers with hydrogen peroxide (H 2 0 2 or aqueous hydrogen peroxide solution), as oxidizing agent, in leaving them to diffuse, and in then rinsing the fibres.
  • hydrogen peroxide H 2 0 2 or aqueous hydrogen peroxide solution
  • the colourings resulting therefrom have the advantage of being permanent, strong and resistant to external agents, in particular to light, bad weather, washing, perspiration and rubbing.
  • direct dyes which are coloured and colouring molecules that have affinity for the fibres.
  • the direct dyes generally used are chosen from nitrobenzene, anthraquinone, nitropyridine, azo, methine, azomethine, xanthene, acridine, azine and triarylmethane direct dyes.
  • the presence of such compounds enables the colouring obtained to be further enriched with tints or enables the chromaticity of the colouring obtained to be increased.
  • This direct dyeing may be performed at acidic, neutral or alkaline pH and in the presence or absence of an oxidizing agent.
  • Dyeing whether direct dyeing or oxidation dyeing, must moreover satisfy a certain number of requirements. Thus, it must be free of toxicological drawbacks, it must enable the desired shades to be obtained and it must show good resistance to external attacking factors such as light, bad weather, washing, permanent waving, perspiration and rubbing.
  • the dyeing process must also make it possible to obtain shades that are as unselective as possible, i.e. it must produce the smallest possible colour differences all along the same keratin fibre, which generally comprises areas that are differently sensitized (i.e. damaged) from its end to its root.
  • compositions used in the dyeing process must also have good mixing and application properties on keratin fibres, and in particular good rheological properties so as not to run, when they are applied, onto the face, onto the scalp or beyond the areas that it is proposed to dye.
  • Direct dyeing is usually performed in a lightening dyeing process using at least one dye composition comprising a direct dye and at least one oxidizing composition, which are mixed together at the time of use just before application to the fibres.
  • dyeing processes which use oxidation dyes are usually carried out using several compositions, at least one dye composition and at least one oxidizing composition, which are mixed extemporaneously just before application of the generally alkaline or neutral final composition to the fibres.
  • at least one dye composition and at least one oxidizing composition which are mixed extemporaneously just before application of the generally alkaline or neutral final composition to the fibres.
  • the dye composition(s), on the one hand, and the oxidizing aqueous composition, on the other hand, which has an acidic pH to ensure the stability of the hydrogen peroxide are stored separately, and are not placed in contact until the time of use.
  • kits or multicompartment devices
  • the dye compositions and oxidizing compositions are in different galenical forms, for instance powders, granules, pastes or creams, which may complicate the mixing and the production of a homogeneous final composition (see, for example, US 2007/0006, US 2008/0 263 786, US 2009/0 056 039, US 2010/064 449, EP 23601604, WO 2012/015 034, WO 1 1/059 027, US 201 1/203 604, FR 0 756 173 and EP 2 01 1 474).
  • compositions derived from these powders, granules, pastes and creams do not always give compositions with satisfactory textures.
  • mixtures obtained do not always give the keratin fibres satisfactory colours, in particular in terms of intensity, dyeing power, chromaticity and/or sparingly selective colourings, i.e. colourings that are sparingly homogeneous between the root and the end of the fibre.
  • they do not always lead to easy application with a suitable consistency.
  • the aim of the present invention is to provide an article for treating keratin fibres, in particular for dyeing and/or bleaching keratin fibres, which can solve the problems, in particular the handling problems, of the known compositions of the prior art, by proposing an article comprising an envelope and at least one anhydrous composition comprising at least one fibrous clay and at least one compound chosen from:
  • colouring agents chosen from oxidation dyes, direct dyes, and/or mixtures thereof;
  • This article makes it possible to avoid the handling problems linked to the volatility of the powders or the weighing-out problems by proposing a ready-to-use product, without a step of metering out. It also makes it possible to improve the resistance of the composition to temperature variations, and in particular makes it possible to avoid the problem of destabilization on storage at low temperatures and during transportation including temperature cycles. It also makes it possible to avoid losses of dyeing power and/or of lightening power.
  • Another object of the present invention is to propose dyeing and/or bleaching compositions for keratin fibres that are easy to mix and to apply and that in particular allow homogeneous distribution of the composition over the hair.
  • An object of the present invention is therefore to propose a composition for dyeing and/or bleaching keratin fibres which, while preserving good dyeing and/or lightening properties, simultaneously makes it possible to regulate the problems of storage area and of storage-stability of the compositions, which avoids the user coming into any direct contact with the dyes and other ingredients used in the dyeing and/or bleaching, such as the colouring agents and the chemical oxidizing agents, which is easy to use and which does not run outside the areas that it is desired to dye.
  • an envelope defining at least one cavity, the envelope comprising water-soluble and/or liposoluble fibres, preferably water-soluble polymer fibres;
  • At least one anhydrous composition preferably in paste or powder form, containing at least one fibrous clay and at least one compound chosen from: a) colouring agents chosen from oxidation dyes, direct dyes, and/or mixtures thereof; and/or
  • composition ii) is in one of the cavities defined by the envelope i).
  • cosmetic packaging article is intended to mean an article suitable for cosmetic use, in particular for use of the packaging article on keratin fibres and/or the scalp.
  • the packaging article makes it possible to dye and/or bleach keratin fibres and in particular the hair.
  • the anhydrous composition ii) is a dye and/or bleaching and/or oxidizing composition.
  • Another subject of the invention is a process for dyeing and/or bleaching keratin fibres, in particular human keratin fibres such as the hair, comprising at least one step of using at least one packaging article as defined above.
  • Another subject of the invention is a process for dyeing and/or bleaching keratin fibres, in particular human keratin fibres such as the hair, comprising the following steps: i) mixing the packaging article of the invention with a composition that is capable of dissolving the packaging article, ii) applying the resulting composition to the keratin fibres, iii) leaving the composition to stand on the fibres, iv) rinsing said fibres, v) optionally shampooing the fibres, rinsing them and drying them, the composition that is capable of dissolving the packaging article possibly containing a colouring agent and/or a chemical oxidizing agent.
  • Another subject of the invention is the use of the packaging article as defined previously for dyeing and/or bleaching keratin fibres, preferably the hair.
  • the use of the packaging article makes it possible to obtain keratin fibre dye and/or bleaching compositions of which the consistency is pleasant on use, which are easy to apply and which do not run outside the areas to be treated.
  • the colourings obtained on the keratin fibres have excellent dyeing properties in particular in terms of the chromaticity, selectivity, intensity, strength or persistence, which are identical, comparable to or even better than those of compositions with standard packaging, i.e. in separate liquid form.
  • the bleaching obtained is of good intensity and good uniformity.
  • the packaging article of the invention makes it possible to no longer have direct contact between the user and the powdered ingredients.
  • the packaging article has a size that is reduced to its strict minimum, very compact, without bulky packaging.
  • a composition is said to be “anhydrous” when it comprises a water content of not more than 3% and preferably not more than 1 % by weight relative to the weight of the composition.
  • this water content is not more than 0.5% by weight relative to the weight of the composition. More particularly, the water content ranges from 0 to 1 % by weight and preferably from 0 to 0.5% by weight relative to the total weight of the composition.
  • anhydrous is in particular intended to mean that water is preferably not deliberately added to the compositions, but may be present in trace amounts in the various compounds used in the compositions.
  • anhydrous paste is intended to mean an anhydrous composition with a viscosity of greater than 5 poises and preferably greater than 10 poises, measured at 25°C and at a shear rate of 1 s "1 ; this viscosity may be determined using a cone-plate rheometer.
  • anhydrous powder form is intended to mean an anhydrous composition or ingredient in pulverulent form, which is preferably substantially free of dust (or fine particles).
  • the particle size distribution of the particles is such that the weight ratio of particles less than or equal to 100 micrometres in size (fines content) and preferably less than or equal to 65 micrometres in size (fines content) is advantageously less than or equal to 5%, preferably less than 2% and more particularly less than 1 % (particle size evaluated using a Retsch AS 200 Digit particle size analyser; oscillation height: 1.25 mm/screening time: 5 minutes).
  • the particle size is between 100 ⁇ and 3 mm and more particularly between 65 ⁇ and 2 mm.
  • the anhydrous composition ii) comprising at least one fibrous clay and at least one compound chosen from chemical oxidizing agents and/or oxidation dyes and/or direct dyes, and/or mixtures thereof, is in paste or powder form and is introduced into one or more cavities formed by the envelope.
  • the envelope may be constituted of a sheet constituted of water-soluble and/or liposoluble fibres and which is folded on itself, or alternatively the envelope may be constituted of a first sheet that is covered with a second sheet also constituted of water- soluble and/or liposoluble fibres.
  • the sheet folded on itself or the two sheets are then hermetically assembled so that the pastes or powders cannot diffuse out, the pastes or powders thus being hermetically enveloped by the envelope i).
  • water-soluble is intended to mean soluble in water, in particular in a proportion of at least 10 grams per litre of water, preferably at least 20 g/l and better still at least 50 g/l, at a temperature of less than or equal to 35°C.
  • liposoluble is intended to mean soluble in a liquid fatty substance as defined below, in particular in a proportion of at least 10 grams per litre of liquid fatty substance, in particular in a plant oil or mineral oil such as liquid petroleum jelly, preferably at least 20 g/l in a liquid fatty substance, better still at least 50 g/l in a fatty substance, at a temperature of less than or equal to 35°C.
  • temperature of less than or equal to 35°C is intended to mean a temperature not exceeding 35°C but greater than or equal to 0°C, for example ranging from more than 1 .0°C to 35°C, better still from 5°C to 30°C and even better still from 10°C to 30°C or 10°C to 20°C. It is understood that all the temperatures are given at atmospheric pressure.
  • the packaging article according to the invention is preferably water-soluble or liposoluble at a temperature of less than or equal to 35°C.
  • the cosmetic packaging article according to the invention comprises:
  • At least one anhydrous composition containing at least one fibrous clay and at least one compound chosen from:
  • colouring agents chosen from oxidation dyes, direct dyes, and/or mixtures thereof;
  • the packaging article preferably comprises only one cavity.
  • the envelope of the present invention comprises one or more sheets of water- soluble and/or liposoluble fibres and one or more cavities containing the anhydrous composition ii), the composition ii) being distinct from the sheet or from the envelope.
  • Such an envelope is different from water-soluble or liposoluble thin films in which the composition ii) would be incorporated in the sheet(s) forming the envelope.
  • the envelope according to the invention has the advantage of allowing the incorporation of constituents that are incompatible therewith, and of being simpler to use since it does not require any premixing or any dissolution in a solvent of the constituents, or any heating to evaporate the solvent.
  • the process for manufacturing the packaging article of the invention is also faster and less expensive than the process for manufacturing thin films.
  • the active agents in this case in particular the colouring agents and/or the chemical oxidizing agents
  • this may give rise to compatibility problems and mechanical problems (breaking of the film) and may impose limits on the concentration of active agents.
  • the envelope and the sheets that are useful for the invention have the advantage of allowing wider diversity in the choice of the shape and appearance of the article, since the water- soluble and/or liposoluble sheet(s) may have a variable thickness and a variable density, giving access to a wide variety of shapes and sizes, whereas the thin film is difficult to dry if the thickness is too large, and it is fragile and difficult to manipulate if the size is too large.
  • the envelope or the sheets are "touch-deformable" , which in particular means that the envelope and the sheets become deformed when they are held and pinched between a user's fingers.
  • the anhydrous composition ii) in powder or paste form is present in a cavity generated by at least two sheets constituting the envelope and defining between them a cavity, said sheets preferably comprising water-soluble fibres.
  • At least one of the sheets of the packaging article is constituted exclusively of water-soluble fibres, and more preferentially all the sheets of the packaging article of the invention are constituted exclusively of water-soluble fibres, preferably water-soluble at a temperature of less than or equal to 30°C.
  • fibre is intended to mean any object of which the length is greater than its cross section.
  • L is greater and preferably very much greater (i.e. at least three times greater) than D, D being the diameter of the circle in which the cross section of the fibre is inscribed.
  • the ratio L/D is chosen in the range from 3.5 to 2500, preferably from 5 to 500 and better still from 5 to 150.
  • the cross section of a fibre may have any round, toothed or fluted shape, or alternatively a bean shape, but also multilobate, in particular trilobate or pentalobate, X-shaped, ribbon-shaped, square, triangular, elliptical or the like.
  • the fibres of the invention may or may not be hollow.
  • the fibres used according to the present invention may be of natural, synthetic or even artificial origin.
  • said fibres are of synthetic origin.
  • a "natural fibre” is by definition a fibre that is naturally present in nature, directly or after mechanical and/or physical treatment. Fibres of animal origin, such as cellulose fibres, in particular extracted from wood, plants or algae, and rayon fibres, are collated in this category.
  • the "artificial fibres” are either totally synthetic or derived from natural fibres that have been subjected to one or more chemical treatments in order in particular to improve their mechanical and/or physicochemical properties.
  • the "synthetic fibres” collate fibres obtained by chemical synthesis and are generally fibres constituted of one or more mono-component or multi-component, composite or non-composite polymers and/or copolymers, which are generally extruded and/or drawn to the desired diameter of the fibre.
  • the fibres of the invention are constituted of one or more water-soluble polymers.
  • the water-soluble polymer(s) of the invention contain water-soluble units in their backbones.
  • the water-soluble units are obtained from one or more water-soluble monomers.
  • water-soluble monomer is intended to mean a monomer of which the solubility in water is greater than or equal to 1 % and preferably greater than or equal to 5% at 25°C and at atmospheric pressure (760 mmHg).
  • Said synthetic water-soluble polymer(s) used in the context of the present invention are advantageously obtained from water-soluble monomers comprising at least one double bond.
  • These monomers may be chosen from cationic, anionic and non-ionic monomers, and mixtures thereof.
  • water-soluble monomers that may be used as precursors of the water-soluble units, alone or as a mixture, examples that may be mentioned include the following monomers, which may be in free or salified form:
  • N-vinyllactams comprising a cyclic alkyl group containing from 4 to 9 carbon atoms, such as N-vinylpyrrolidone, N-butyrolactam and N-vinylcaprolactam,
  • DMAEMA dimethylaminoethyl methacrylate
  • R is chosen from H and (CrC 6 )alkyl such as methyl, ethyl and propyl;
  • R' is a linear or branched, saturated or unsaturated hydrocarbon-based radical containing from 1 to 6 carbon atoms, optionally substituted with at least one halogen atom (iodine, bromine, chlorine or fluorine); a sulfonic (-S0 3 " ), sulfate (-SO4 " ), phosphate (-P0 4 H 2 ); hydroxyl (-OH); primary amine (-NH 2 ); secondary amine (-NHR 6 ), tertiary amine (-NR 6 R 7 ) or quaternary amine (-N + R 6 R 7 R8) group with R 6 , R 7 and R 8 being, independently of each other, a linear or branched, saturated or unsaturated hydrocarbon-based radical containing 1 to 6 carbon atoms, with the proviso that the sum of the carbon atoms of R' + R 6 + R 7 + Re does not exceed 6;
  • R' and R" are, independently of each other, linear or branched, saturated or unsaturated hydrocarbon-based radicals containing 1 to 6 carbon atoms, with the proviso that the total number of carbon atoms of R' + R" does not exceed 6, said R' and R" being optionally substituted with one halogen atom (iodine, bromine, chlorine or fluorine); a hydroxyl (-OH); sulfonic (-S0 3 " ), sulfate (-S0 4 " ), phosphate (-P0 4 H 2 ); primary amine (-NH 2 ); secondary amine (-NHR 6 ), tertiary amine (- NR 6 R 7 ) and/or quaternary amine (-N + R 6 R 7 R8) group with R 6 , R 7 and R 8 being, independently of each other, a linear or branched, saturated or unsaturated hydrocarbon-
  • Anionic monomers that may in particular be mentioned include (meth)acrylic acid, acrylamido-2-methylpropanesulfonic acid, itaconic acid and alkali metal, alkaline-earth metal or ammonium salts thereof or salts thereof derived from an organic amine such as an alkanolamine.
  • Non-ionic monomers that may in particular be mentioned include (meth)acrylamide,
  • N-vinylformamide, N-vinylacetamide, hydroxypropyl (meth)acrylate and the vinyl alcohol of formula CH 2 CHOH.
  • the cationic monomers are preferably chosen from quaternary ammonium salts derived from a diallylamine and those corresponding to formula (II) below:
  • Ri represents a hydrogen atom or a methyl group
  • R 2 and R 3 which may be identical or different, represent a hydrogen atom or a linear or branched C1-C4 alkyl group
  • R 4 represents a hydrogen atom or a linear or branched C1-C4 alkyl group or an aryl group
  • D represents the following divalent unit: -(Y) n -(A)- in which:
  • - Y represents an amide function, an ester (O-C(O) or C(O)-O), a urethane or a urea
  • A represents a linear or branched, cyclic or acyclic C1-C10 alkylene group, which may be substituted or interrupted with a divalent aromatic or heteroaromatic group.
  • the alkylene groups may be interrupted with an oxygen atom, a nitrogen atom, a sulfur atom or a phosphorus atom; the alkylene may be interrupted with a ketone function, an amide, an ester (O-C(O) or C(O)-O), a urethane or a urea,
  • - n is an integer ranging from 0 to 1 ,
  • X " represents an anionic counterion, for instance a chloride or a sulfate.
  • water-soluble cationic monomers examples include the following compounds, and also salts thereof: dimethylaminoethyl, (meth)acryloyloxyethyltrimethylammonium,
  • the polymer of use according to the invention is polymerized from at least one cationic monomer as defined above.
  • the polymers are polymerized from the following monomers comprising at least one double bond as follows:
  • the polymers are polymerized from a cationic monomer and acrylic acid, the number of moles of the cationic monomer being greater than the number of moles of acrylic acid.
  • water-soluble polymers derived from natural products mention may be made of polysaccharides, i.e. polymers bearing a sugar unit or sugar units.
  • sugar unit is intended to mean a unit derived from a carbohydrate of formula C n (H 2 0) n -i or (CH 2 0) n , which may be optionally modified by substitution and/or by oxidation and/or by dehydration.
  • the sugar units that may be included in the composition of the polymers of the invention are preferably derived from the following sugars: glucose, galactose, arabinose, rhamnose, mannose, xylose, fucose, fructose, anhydrogalactose, galacturonic acid, glucuronic acid, mannuronic acid, galactose sulfate or anhydrogalactose sulfate.
  • the polymers bearing a sugar unit or sugar units according to the invention may be of natural or synthetic origin. They can be non-ionic, anionic, amphoteric or cationic.
  • the base units of the polymers bearing a sugar unit of the invention may be monosaccharides or disaccharides.
  • a) tree or shrub exudates including:
  • gum arabic branched polymer of galactose, arabinose, rhamnose and glucuronic acid
  • - ghatti gum polymer derived from arabinose, galactose, mannose, xylose and glucuronic acid
  • karaya gum polymer derived from galacturonic acid, galactose, rhamnose and glucuronic acid
  • tragacanth (or tragacanth) (polymer of galacturonic acid, galactose, fucose, xylose and arabinose);
  • gums derived from algae including:
  • gums resulting from seeds or tubers including:
  • locust bean gum polymer of mannose and galactose
  • - konjac gum polymer of glucose and mannose in which the main constituent is glucomannan, a polysaccharide of high molecular weight (500 000 ⁇ M g i ucomannan ⁇ 2 000 000) composed of D-mannose and D-glucose units with a branch every 50 or 60 units approximately;
  • microbial gums including: - xanthan gum (polymer of glucose, mannose acetate, mannose/pyruvic acid and glucuronic acid);
  • - gellan gum polymer of partially acylated glucose, rhamnose and glucuronic acid
  • biosaccharide gum polymer of galacturonic acid, fucose and D-galactose
  • Fucogel 1.5P from Solabia (polysaccharide rich in fucose (20%) at 1.1 % in water and stabilized (1 .5% phenoxyethanol));
  • e) plant extracts including:
  • polymers can be physically or chemically modified. Mention may in particular be made, as physical treatment, of the temperature. Chemical treatments that may be mentioned include esterification, etherification, amidation or oxidation reactions. These treatments make it possible to result in polymers which can be non-ionic, anionic, cationic or amphoteric.
  • these chemical or physical treatments are applied to guar gums, locust bean gums, starches and celluloses.
  • non-ionic guar gums that may be used according to the invention may be modified with Ci-C 6 hydroxyalkyl groups. Mention may be made, among the hydroxyalkyl groups, of the hydroxymethyl, hydroxyethyl, hydroxypropyl and hydroxybutyl groups.
  • guar gums are well known from the state of the art and can, for example, be prepared by reacting corresponding alkene oxides, such as, for example, propylene oxides, with the guar gum, so as to obtain a guar gum modified with hydroxypropyl groups.
  • the degree of hydroxyalkylation preferably varies from 0.4 to 1 .2 and corresponds to the number of alkylene oxide molecules consumed by the number of free hydroxyl functional groups present on the guar gum.
  • non-ionic guar gums optionally modified with hydroxyalkyl groups are sold, for example, under the trade names Jaguar HP8, Jaguar HP60 and Jaguar HP120 by Rhodia Chimie.
  • the guar gums modified with cationic groups which can more particularly be used according to the invention are guar gums comprising trialkylammonium cationic groups.
  • guar gums comprising trialkylammonium cationic groups.
  • from 2% to 30% by number of the hydroxyl functional groups of these guar gums carry trialkylammonium cationic groups.
  • from 5% to 20% by number of the hydroxyl functional groups of these guar gums are branched with trialkylammonium cationic groups.
  • Mention may very particularly be made, among these trialkylammonium groups, of the trimethylammonium and triethylammonium groups. More preferably still, these groups represent from 5% to 20% by weight, relative to the total weight of the modified guar gum.
  • guar gums modified with 2,3- epoxypropyltrimethylammonium chloride.
  • guar gums modified with cationic groups are products already known per se and are, for example, described in Patents US 3 589 578 and US 4 031 307. Such products are moreover sold in particular under the trade names Jaguar C13 S, Jaguar C 15 and Jaguar C 17 by Rhodia Chimie.
  • modified locust bean gum of the cationic locust bean gum containing hydroxypropyltrimonium groups, such as Catinal CLB 200 provided by Toho.
  • the starch molecules used in the present invention may originate from any plant source of starch, in particular cereals and tubers; more particularly, they may be starches from corn, rice, cassava, barley, potato, wheat, sorghum, pea, oat or tapioca. Use may also be made of the hydrolysates of the abovementioned starches.
  • the starch is preferably derived from potato.
  • the starches can be chemically or physically modified, in particular by one or more of the following reactions: pregelatinization, oxidation, crosslinking, esterification, etherification, amidation or heat treatments.
  • the composition according to the invention comprises at least starch or a starch modified by at least one of the following reactions: pregelatinization, oxidation, crosslinking, esterification, etherification, amidation, heat treatments.
  • Ci-C 6 acyl acetyl
  • Ci-C 6 hydroxyalkyl hydroxyethyl or hydroxypropyl
  • carboxymethyl or octenylsuccinic in particular Ci-C 6 acyl (acetyl), Ci-C 6 hydroxyalkyl (hydroxyethyl or hydroxypropyl), carboxymethyl or octenylsuccinic.
  • Monostarch phosphates (of the type Am-0-PO-(OX) 2 ), distarch phosphates (of the type Am-O-PO-(OX)-O-Am) or even tristarch phosphates (of the type Am-0-PO-(0-Am) 2 ) or mixtures thereof may in particular be obtained by crosslinking with phosphorus compounds, Am meaning starch and X in particular denoting alkali metals (for example sodium or potassium), alkaline earth metals (for example calcium or magnesium), ammonium salts, amine salts, for instance those of monoethanolamine, diethanolamine, triethanolamine, 3-amino-1 ,2-propanediol, or ammonium salts derived from basic amino acids such as lysine, arginine, sarcosine, ornithine or citrulline.
  • alkali metals for example sodium or potassium
  • alkaline earth metals for example calcium or magnesium
  • ammonium salts for instance those of monoethanolamine,
  • the phosphorus compounds can, for example, be sodium tripolyphosphate, sodium orthophosphate, phosphorus oxychloride or sodium trimetaphosphate.
  • distarch phosphates or compounds rich in distarch phosphate such as the product sold under the references Prejel VA-70-T AGGL (gelatinized hydroxypropyl cassava distarch phosphate), Prejel TK1 (gelatinized cassava distarch phosphate) and Prejel 200 (gelatinized acetyl cassava distarch phosphate) by Avebe, or Structure Zea from National Starch (gelatinized corn distarch phosphate).
  • a preferred starch is a starch that has undergone at least one chemical modification such as at least one esterification.
  • amphoteric starches comprising one or more anionic groups and one or more cationic groups may also be used.
  • the anionic and cationic groups can be bonded to the same reactive site of the starch molecule or to different reactive sites; they are preferably bonded to the same reactive site.
  • the anionic groups can be of carboxylic, phosphate or sulfate type, preferably of carboxylic type.
  • the cationic groups can be of primary, secondary, tertiary or quaternary amine type.
  • amphoteric starches are in particular chosen from the compounds having the following formulae:
  • St-0 represents a starch molecule
  • R which may be identical or different, represents a hydrogen atom or a methyl radical
  • ⁇ R' which may be identical or different, represents a hydrogen atom, a methyl radical or a group -C(0)-OH;
  • n is an integer equal to 2 or 3;
  • M which may be identical or different, denotes a hydrogen atom, an alkali metal or alkaline-earth metal such as Na, K or Li, a quaternary ammonium NH 4 , or an organic amine,
  • starches of formulae (II) or (III) Use is in particular made of the starches of formulae (II) or (III); and preferably starches modified with 2-chloroethylaminodipropionic acid, that is to say the starches of formula (II) or (III) in which R, R', R" and M represent a hydrogen atom and n is equal to 2.
  • the preferred amphoteric starch is a starch chloroethylamidodipropionate.
  • the celluloses and cellulose derivatives can be anionic, cationic, amphoteric or non-ionic.
  • cellulose ethers cellulose esters and cellulose ester ethers are distinguished.
  • cellulose esters Mention may be made, among the cellulose esters, of inorganic cellulose esters (cellulose nitrates, sulfates or phosphates), organic cellulose esters (cellulose monoacetates, triacetates, amidopropionates, acetate butyrates, acetate propionates or acetate trimellitates), and mixed organic/inorganic cellulose esters, such as cellulose acetate butyrate sulfates and cellulose acetate propionate sulfates.
  • inorganic cellulose esters cellulose nitrates, sulfates or phosphates
  • organic cellulose esters cellulose monoacetates, triacetates, amidopropionates, acetate butyrates, acetate propionates or acetate trimellitates
  • mixed organic/inorganic cellulose esters such as cellulose acetate butyrate sulfates and cellulose acetate propionate sulfates.
  • non-ionic cellulose ethers that may be mentioned are alkylcelluloses such as methylcelluloses and ethylcelluloses (for example Ethocel Standard 100 Premium from Dow Chemical); hydroxyalkylcelluloses such as hydroxymethylcelluloses and hydroxyethylcelluloses (for example Natrosol 250 HHR sold by Aqualon) and hydroxypropylcelluloses (for example Klucel EF from Aqualon); mixed hydroxyalkyl- alkylcelluloses such as hydroxypropylmethylcelluloses (for example Methocel E4M from Dow Chemical), hydroxyethylmethylcelluloses, hydroxyethylethylcelluloses (for example Bermocoll E 481 FQ from Akzo Nobel) and hydroxybutylmethylcelluloses.
  • alkylcelluloses such as methylcelluloses and ethylcelluloses (for example Ethocel Standard 100 Premium from Dow Chemical); hydroxyalkylcelluloses such as hydroxymethylcelluloses and hydroxyethylcelluloses (for example Nat
  • Mention may be made, among the anionic cellulose ethers, of carboxyalkylcelluloses and their salts. Mention may be made, as examples, of carboxymethylcelluloses, carboxymethyl methylcelluloses (for example Blanose 7M from Aqualon) and carboxymethyl hydroxyethylcelluloses, and also their sodium salts.
  • cationic cellulose ethers Mention may be made, among the cationic cellulose ethers, of crosslinked or non- crosslinked quaternized hydroxyethylcelluloses.
  • the quaternizing agent may in particular be diallyldimethylammonium chloride (for example Celquat L200 from National Starch).
  • Another cationic cellulose ether that may be mentioned is hydroxypropyltrimethylammonium hydroxyethyl cellulose (for example Ucare Polymer JR 400 from Amerchol).
  • celluloses or derivatives thereof modified with groups comprising at least one fatty chain, such as alkyl, arylalkyi or alkylaryl groups or mixtures thereof in which the alkyl groups are of C8-C22; non-ionic alkylhydroxyethylcelluloses such as the products Natrosol Plus Grade 330 CS and Polysurf 67 (Ci 6 alkyl) sold by the company Aqualon; quaternized alkylhydroxyethylcelluloses (cationic), such as the products Quatrisoft LM 200, Quatrisoft LM-X 529-18-A, Quatrisoft LM-X 529-18-B (C i2 alkyl) and Quatrisoft LM-X 529-8 (Ci 8 alkyl) sold by the company Amerchol, the products Crodacel QM and Crodacel QL (Ci2 alkyl) and Crodacel QS (C
  • hydroxypropyl guars modified with a fatty chain such as the product Esaflor HM 22 (modified with a C22 alkyl chain) sold by the company Lamberti; the product Miracare XC 95-3 (modified with a C14 alkyl chain) and the product RE 205- 146 (modified with a C 20 alkyl chain) sold by Rhodia Chimie.
  • the polymer(s) bearing a sugar unit or sugar units of the invention are preferably chosen from guar gums, locust bean gums, xanthan gums, starches and celluloses, in their modified form (derivatives) or unmodified.
  • the polymers bearing a sugar unit or sugar units according to the invention are non-ionic.
  • the polymer(s) bearing a sugar unit or sugar units of the invention are chosen from modified non-ionic guar gums, in particular modified with Ci-C 6 hydroxyalkyl groups.
  • the polymers described above more particularly have a weight-average molecular weight of greater than 1 000 000 and preferably between 1 000 000 and 50 000 000.
  • the molecular weight is determined by the RSV (Reduced Specific Viscosity) method as defined in “Principles of Polymer Chemistry” Georgia University Press, Ithaca, NY 1953 Chapter VII "Determination of molecular weight” pp. 266-316.
  • the fibres may be spun, carded or twisted.
  • the fibres used in the context of the present invention are spun.
  • the mean diameter of the fibres used according to the present invention is less than 500 ⁇ .
  • such a diameter is less than 200 ⁇ , preferably less than 100 ⁇ or even less than 50 ⁇ .
  • water-soluble fibres that include fibres based on polyvinyl alcohol, fibres of polysaccharides such as glucomannans, starches or celluloses such as carboxymethylcelluloses, polyalginic acid fibres, polylactic acid fibres and polyalkylene oxide fibres, and also mixtures thereof. More preferentially, the water- soluble fibre(s) used in the invention are chosen from PVA-based fibres.
  • the fibres of the envelope or of the sheets are generally entangled.
  • envelope or sheet comprising water-soluble fibres is intended to mean an envelope or sheets which may be constituted entirely of water-soluble fibres or a sheet which may comprise both water-soluble fibres and fibres that are insoluble in water at a temperature of less than or equal to 35°C, the soluble fibres necessarily being in a larger amount than the insoluble fibres.
  • the sheet of fibres should comprise at least 60% by weight, preferably at least 70% and better still at least 80% by weight of soluble fibres relative to the total weight of fibres. It may thus comprise, for example, more than 95% by weight, or even more than 99% by weight and even 100% by weight of water-soluble fibres relative to the total weight of fibres in the envelope or the sheets.
  • the latter fibres may be made of any material usually used as insoluble fibres; they may be, for example, silk fibre, cotton fibre, wool fibre, flax fibre, polyamide (Nylon®) fibre, polylactic acid fibre, modified cellulose (rayon, viscose or rayon acetate) fibre, poly-p-phenyleneterephthalamide fibre, in particular Kevlar® fibre, polyolefin fibre and in particular polyethylene or polypropylene fibre, glass fibre, silica fibre, aramid fibre, carbon fibre, in particular in graphite form, Teflon® fibre, insoluble collagen fibre, polyester fibre, polyvinyl or polyvinylidene chloride fibre, polyethylene terephthalate fibre, and fibres formed from a mixture of the compounds mentioned above, for instance polyamide/polyester or viscose/polyester fibres.
  • envelope and the sheets of the invention may be woven or nonwoven.
  • the envelope and the sheets of the invention are woven.
  • a "woven" material results from an organized assembly of fibres, in particular of water-soluble polymeric fibres, and more particularly of an intercrossing, in the same plane, of said fibres, arranged in the warp direction and of fibres arranged perpendicular to the warp fibres, in the weft direction.
  • the binding obtained between these warp and weft fibres is defined by a weave.
  • Such a woven material results from an operation directed towards assembling the fibres in an organized manner such as weaving per se, but may also result from knitting.
  • the two layers or sheets comprising the woven polymeric water- soluble fibres that constitute the envelope of the packaging article of the invention do not comprise any other additional layer superposed thereon.
  • the envelope and the sheets are nonwoven.
  • nonwoven is intended to mean a substrate comprising fibres, in particular water-soluble polymeric fibres, in which substrate the individual fibres are arranged in a disordered manner in a structure in the form of a sheet and which are neither woven nor knitted.
  • the fibres of the nonwoven are generally bonded together, either under the effect of a mechanical action (for example needle punching, air jet, water jet, etc.), or under the effect of a thermal action, or by addition of a binder.
  • Such a nonwoven is, for example, defined by standard ISO 9092 as a web or sheet of directionally or randomly orientated fibres, bonded by friction and/or cohesion and/or adhesion, excluding paper and products obtained by weaving, knitting, tufting or stitching incorporating binding yarns or filaments.
  • a nonwoven differs from a paper by virtue of the length of the fibres used. In paper, the fibres are shorter. However, there are nonwovens based on cellulose fibre, which are manufactured by a wet-laid process and that have short fibres as in paper. The difference between a nonwoven and a paper is generally the absence of hydrogen bonding between the fibres in a nonwoven.
  • the fibres used in the context of the present invention are chosen from synthetic fibres such as PVA fibres.
  • the envelope and sheets of the invention are nonwoven, and preferentially made of nonwoven PVA fibres.
  • the nonwoven water-soluble sheet(s) of the envelope of the packaging article use is preferably made of PVA fibres that are soluble in water at a temperature of less than or equal to 35°C, for instance the fibres sold by the Japanese company Kuraray under the name Kuralon K-ll, and particularly the grade WN2 which is soluble at and above 20°C.
  • These fibres are described in document EP-A-636 716 which teaches the manufacture of PVA fibres that are soluble in water at temperatures not exceeding 100°C, by spinning and drawing the polyvinyl alcohol polymer in dry or wet form in the presence of solvents participating in the dissolution and solidification of the fibre. The fibre thus obtained may lead to the production of woven or nonwoven substrates.
  • the PVA fibres of the examples of EP-A- 636 716 are used, in particular Example 2 and Comparative Example 1 : commercial product Solvron SS.
  • These fibres may also be prepared from a solution to be spun, by dissolving a water-soluble PVA-based polymer in a first organic solvent, spinning the solution in a second organic solvent to obtain solidified filaments and wet-drawing of the filaments from which the first solvent is removed, and which are then dried and subjected to a heat treatment.
  • the cross section of these fibres may be substantially circular.
  • These fibres have a tensile strength of at least 2.7 g/dtex (3 g/d).
  • Patent application EP-A-0 636 716 describes such PVA-based water-soluble fibres and the process for manufacturing them.
  • the fibres may also be formed by extrusion and deposited on a conveyor to form a sheet of fibres which is then consolidated via a standard fibre bonding technique, for instance needle punching, hot-bonding, calendering or air-through bonding, in which technique the water-soluble sheet passes through a tunnel in which hot air is blown, or hydroentanglement directed towards bonding the fibres via the action of fine jets of water at very high pressure, which cannot be applied to fibres of which the dissolution temperature is too low pressure.
  • a standard fibre bonding technique for instance needle punching, hot-bonding, calendering or air-through bonding, in which technique the water-soluble sheet passes through a tunnel in which hot air is blown, or hydroentanglement directed towards bonding the fibres via the action of fine jets of water at very high pressure, which cannot be applied to fibres of which the dissolution temperature is too low pressure.
  • the invention is not limited to the use of PVA, and use may also be made of fibres made of other water-soluble materials, provided that these materials dissolve in water having the desired temperature, for example the polysaccharide fibres sold under the name Lysorb by the company Lysac Technologies, Inc. or other fibres based on polysaccharide polymers such as glucomannans or starch.
  • the sheets of the envelope may comprise a mixture of different fibres that are soluble in water at various temperatures (up to 35°C).
  • the fibres may be composite, and they may comprise, for example, a core and a sheath not having the same nature, for example formed from different grades of PVA.
  • the sheet(s) of the envelope is (are) a nonwoven comprising water-soluble fibres, alone or as a mixture with insoluble fibres as indicated above, with not more than 40% by weight of insoluble fibres relative to the total weight of the fibres constituting the sheet.
  • the nonwoven is constituted essentially of water-soluble fibres, i.e. it does not contain any insoluble fibres.
  • the envelope may have any shape that is suitable for the intended use, for example a rectangular, circular or oval shape, and it preferably has dimensions that enable it to be held between at least two fingers.
  • the envelope or the sheets may have, for example, an ovoid shape from about 2 to 10 cm long and from about 0.5 to 4 cm wide, or a circular disc shape from about 2 to 10 cm in diameter, or a square shape with a side length from about 5 to 15 cm, or a rectangular shape with a length from about 5 to 25 cm, it being understood that it may have any other shape and size that are suitable for the desired use.
  • the envelope and the sheets have a low thickness, the sheets possibly being constituted of several layers.
  • the thickness of the envelope and of the sheets ranges from 3% to 99.9% of its other dimensions. This thickness is in particular less than 100 mm.
  • the envelope and the sheets are thus substantially flat, thin slices.
  • the surface delimiting the cavity(ies) has an area generally less than 625 cm 2 , for example between 400 cm 2 and 0.025 cm 2 .
  • the article according to the present invention may comprise one or more water- soluble nonwoven sheets and envelope.
  • the amount of envelope present in the article according to the invention is inclusively between 0.5% and 20.0% by weight relative to the total weight of said article, advantageously inclusively between 1 .0% and 10.0%, particularly inclusively between 2.0% and 5.0% and more particularly 3% by weight relative to the total weight of the packaging article.
  • Figure 1 a) is a cross section of a particular embodiment of the packaging article comprising the envelope i) constituted of two sheets, which are preferably water-soluble, 1 1 and 12, bonded together in a peripheral region 14.
  • the two sheets are joined by any suitable fixing means such as glueing, welding, in particular heat-welding, and in particular by entanglement.
  • the first sheet 1 1 also has a free central region D arranged facing a free central region D of the second sheet 12.
  • central regions delimit a central cavity; said cavity contains an anhydrous composition ii) as previously defined 13 comprising at least one fibrous clay and at least one compound chosen from chemical oxidizing agents and/or oxidation dyes, and/or direct dyes, and/or mixtures thereof optionally mixed with other additional ingredients.
  • anhydrous composition ii) as previously defined 13 comprising at least one fibrous clay and at least one compound chosen from chemical oxidizing agents and/or oxidation dyes, and/or direct dyes, and/or mixtures thereof optionally mixed with other additional ingredients.
  • the sheets 1 1 and 12 have a closed outer perimeter 15.
  • the shape of the outer perimeter 15 is, for example, rounded, such as circular or elliptical, or polygonal, such as square, rectangular or triangular, preferably circular.
  • Figure 1 b) shows a top view of the packaging article as described in Figure 1 a), in which part D corresponds to the cavity or "central region" in which is found the anhydrous composition ii) as defined previously 13, and d corresponds to the peripheral region hermetically joining the two sheets 1 1 and 12.
  • Figure 1 c) shows a cross section of a particular embodiment of the packaging article, comprising an envelope constituted of two sheets 1 1 and 12, which are preferably water- soluble, and comprising an additional sheet 16, which is preferably water-soluble, and optionally other additional sheets 17, which are preferably water-soluble, which define several cavities in which are housed the ingredients such as the composition ii) as defined previously comprising at least one fibrous clay 18, and at least one compound 19 chosen from colouring agents, and/or chemical oxidizing agents as a powder 20, as defined hereinafter.
  • the ingredients such as the composition ii) as defined previously comprising at least one fibrous clay 18, and at least one compound 19 chosen from colouring agents, and/or chemical oxidizing agents as a powder 20, as defined hereinafter.
  • the first sheet 1 1 has a thickness smaller than its other dimensions, for example less than 10% of its maximum transverse dimension D+2d.
  • the thickness of the first sheet 1 1 is, for example, less than 10 mm and in particular between 0.1 mm and 3 mm. Its maximum transverse dimension D+d is, for example, less than 100 mm, and is in particular inclusively between 10 mm and 60 mm.
  • the first sheet 1 1 thus forms a web, for example of nonwoven, which itself may be constituted of several webs of nonwoven that are consolidated together.
  • the second sheet 12 also has a closed outer perimeter 15.
  • the outer perimeter 15 of the first layer 1 1 has a shape substantially identical to the outer perimeter 15 of the second layer 12.
  • the second sheet 12 has a thickness smaller than its other dimensions, for example less than 10% of its maximum transverse dimension D+2d.
  • the thickness of the second sheet 12, which is preferably water-soluble, is, for example, less than 10 mm and in particular between 0.1 mm and 3 mm. Its maximum transverse dimension D+2d is less than 100 mm, and is in particular between 10 mm and 60 mm.
  • the thickness is advantageously measured according to the standard EDANA WSP 120.1 (5).
  • the second sheet 12 is advantageously a nonwoven.
  • the sheets and nonwoven envelope are soluble in an aqueous solution, such as water.
  • the nonwoven sheets and envelope are preferentially made of PVA.
  • the second sheet may be formed by the first sheet folded on itself 1 1 ' shown in Figure 1 d) in cross section and Figure 1 e) in top view.
  • the sheet is folded on itself along the folding axis and which defines a cavity in which is found a composition ii) comprising at least one colouring agent 18' and/or at least one chemical oxidizing agent as defined below, preferably in powder form, and/or excipients as defined below, preferably in powder form 19', optionally separated by one or more water-soluble sheets 16'.
  • the sheet 1 1 ' once filled with the ingredients 19' and with the water-soluble sheet(s) 16', is folded along the axis e, forming a folding zone 15' and then joined at a peripheral region 14, the shaded part of Figure e), preferably via any suitable fixing means such as glueing, welding, in particular heat-welding, and in particular by entanglement.
  • suitable fixing means such as glueing, welding, in particular heat-welding, and in particular by entanglement.
  • the thickness of the water-soluble sheet 1 1 ' and the transverse dimensions satisfy the same criteria as those defined for the sheet 1 1 or 12 of Figure 1 b).
  • the fibres forming the first sheet 1 1 or 1 1 ' and the second sheet 12, and the additional sheets 16, 16' and 17, are preferably water-soluble, i.e. they are constituted of water-soluble fibres.
  • These fibres are, for example, nonwoven water-soluble fibres such as PVA fibres, polysaccharide fibres, glucomannans or starches, or any other polymer or compound that is capable of forming water-soluble fibres or yarns, obtained, for example, by extrusion.
  • the sheets 1 1 , 1 1 ' and 12 and the optional additional sheets 16, 16' and 17, which are preferably made of nonwoven, generally have a basis weight of less than or equal to 60 g/m 2 , or even less than or equal to 50 g/m 2 and better still less than or equal to 45 g/m 2 .
  • the basis weight of at least one layer may be greater than 60 g/m 2 .
  • the packaging articles comprising water-soluble fibres according to the invention are preferably soluble in water or in an aqueous composition with a dissolution time of the packaging article preferably of not more than one hour.
  • the envelope i) delimits or defines a cavity that is filled with an anhydrous composition ii) comprising at least one compound chosen from colouring agents, and/or chemical oxidizing agents, preferably in powder or paste form; the article is then closed by folding the envelope i) on itself with its contents, followed by assembly at its periphery, for example by glueing or welding, preferably by heat-welding, or alternatively, if the article contains an envelope constituted of two sheets, the anhydrous composition ii), preferably in powder or paste form, is placed on the first sheet, and the article is closed by means of a second sheet which covers the ingredients of the composition ii) placed on the first sheet and which is assembled, for example, by glueing or welding at its periphery, preferably by heat-welding at its periphery, so as to obtain a hermetic article, which does not allow the powders or pastes contained in said article to pass into the atmosphere.
  • anhydrous composition ii) comprising at least one compound chosen from colour
  • these nonwovens may be assembled in particular by heat-welding at their periphery.
  • the heat-welding is performed with entanglement of the fibres of the parts of the envelope to be welded.
  • the packaging article according to the invention also comprises at least one anhydrous composition ii). Said composition ii) is in one of the cavities defined by the envelope i) previously described.
  • composition ii) is preferably in paste or powder form. It is preferably in powder form.
  • the anhydrous composition ii) comprises at least one fibrous clay and at least one compound chosen from:
  • colouring agents chosen from oxidation dyes, direct dyes, and/or mixtures thereof;
  • the anhydrous composition ii) comprises at least one fibrous clay.
  • the clay(s) present in the composition ii) of the invention may be natural or synthetic.
  • Natural clay is a sedimentary rock composed to a large extent of specific minerals, silicates generally of aluminium.
  • Clays, and in particular fibrous clays are products that are already well known per se, which are described, for example, in the publication Mineralogie des argiles [Mineralogy of Clays], S. Caillere, S. Henin, M. Rautureau, 2nd Edition 1982, Masson.
  • clays which are cosmetically compatible with and acceptable for the hair, the skin and/or the scalp.
  • Fibrous clays have a pseudo-layer structure, and are made up of continuous hexagonal layers of oxygen, alternately separated by two compactly assembled layers of oxygen, the stacking of which forms octahedra but which extend in a long ribbon, growth being limited to one dimension. These ribbons are arranged alternately above or below the continuous layer of oxygen which is hexagonally assembled, such that the structure has, in section, the appearance of a hollow brick.
  • the fibrous clay is chosen from sepiolite, palygorskite, attapulgite (which is part of the palygorskite family), and/or mixtures thereof.
  • the fibrous clay is sepiolite, for example the sepiolite Pangel HV sold by the company Tolsa.
  • the fibrous clays according to the invention may optionally be modified.
  • the fibrous clay(s) is (are) present in the anhydrous composition ii) in a total content ranging from 1 % to 80% by weight, in particular from 2% to 80% by weight, preferably from 5% to 60%, and better still from 5% to 40% by weight, relative to the total weight of the anhydrous composition ii).
  • the anhydrous composition ii) comprises at least one colouring agent chosen from oxidation dyes, direct dyes, and/or mixtures thereof.
  • the colouring agent(s) used in the composition according to the invention may be oxidation dyes (also known as oxidation dye precursors) and/or direct dyes, which may be of synthetic or natural origin.
  • the composition comprises at least one oxidation dye.
  • oxidation dye also referred to as an
  • oxidation dye precursor is intended to mean a species that is capable of generating a coloured molecule via a process of oxidative condensation with itself or with one or more other compounds.
  • the oxidation dye precursors are chosen from oxidation bases and couplers, and mixtures thereof.
  • the oxidation dyes comprise an oxidation base or a mixture thereof.
  • the oxidation bases may be chosen from para-phenylenediamines, bis(phenyl)alkylenediamines, para-aminophenols, ortho-aminophenols and heterocyclic bases, and the addition salts thereof.
  • the oxidation base(s) of the invention are chosen from para- phenylenediamines and heterocyclic bases.
  • para-phenylenediamines examples that may be mentioned include para-phenylenediamine, para-tolylenediamine, 2-chloro-para-phenylenediamine, 2,3- dimethyl-para-phenylenediamine, 2,6-dimethyl-para-phenylenediamine, 2,6-diethyl-para- phenylenediamine, 2,5-dimethyl-para-phenylenediamine, N,N-dimethyl-para- phenylenediamine, ⁇ , ⁇ -diethyl-para-phenylenediamine, N,N-dipropyl-para- phenylenediamine, 4-amino-N,N-diethyl-3-methylaniline, N,N-bis(p-hydroxyethyl)-para- phenylenediamine, 4-N,N-bis(p-hydroxyethyl)amino-2-methylaniline, 4-N,N-bis(p- hydroxyethyl)a
  • para-phenylenediamine para-tolylenediamine, 2-isopropyl-para-phenylenediamine, 2-p-hydroxyethyl-para- phenylenediamine, 2-p-hydroxyethyloxy-para-phenylenediamine, 2,6-dimethyl-para- phenylenediamine, 2,6-diethyl-para-phenylenediamine, 2,3-dimethyl-para- phenylenediamine, N,N-bis(p-hydroxyethyl)-para-phenylenediamine, 2-chloro-para- phenylenediamine, 2-p-acetylaminoethyloxy-para-phenylenediamine and 2- methoxymethyl-para-phenylenediamine, and the addition salts thereof with an acid, are particularly preferred.
  • bis(phenyl)alkylenediamines examples that may be mentioned include N,N'-bis(p-hydroxyethyl)-N,N'-bis(4'-aminophenyl)-1 ,3-diaminopropanol, N,N'-bis(p- hydroxyethyl)-N,N'-bis(4'-aminophenyl)ethylenediamine, N,N'-bis(4- aminophenyl)tetramethylenediamine, N,N'-bis(p-hydroxyethyl)-N,N'-bis(4- aminophenyl)tetramethylenediamine, N,N'-bis(4- methylaminophenyl)tetramethylenediamine, N,N'-bis(ethyl)-N,N'-bis(4'-amino-3'- methylphenyl)ethylenediamine and 1 ,8-bis(2,5-diaminophenoxy)-3
  • para-aminophenols examples that may be mentioned include para- aminophenol, 4-amino-3-methylphenol, 4-amino-3-fluorophenol, 4-amino-3-chlorophenol, 4-amino-3-hydroxymethylphenol, 4-amino-2-methylphenol, 4-amino-2- hydroxymethylphenol, 4-amino-2-methoxymethylphenol, 4-amino-2-aminomethylphenol, 4-amino-2-(p-hydroxyethyl-aminomethyl)phenol and 4-amino-2-fluorophenol, and the addition salts thereof with an acid.
  • ortho-aminophenols examples that may be mentioned include 2- aminophenol, 2-amino-5-methylphenol, 2-amino-6-methylphenol and 5-acetamido-2- aminophenol, and the addition salts thereof.
  • heterocyclic bases mention may be made in particular of pyridine derivatives, pyrimidine derivatives and pyrazole derivatives.
  • pyridine derivatives mention may be made of the compounds described for example in patents GB 1 026 978 and GB 1 153 196, for instance 2,5- diaminopyridine, 2-(4-methoxyphenyl)amino-3-aminopyridine and 3,4-diaminopyridine, and the addition salts thereof.
  • pyridine oxidation bases that are useful in the present invention are the 3- aminopyrazolo[1 ,5-a]pyridine oxidation bases or the addition salts thereof, described, for example, in patent application FR 2 801 308.
  • Examples that may be mentioned include pyrazolo[1 ,5-a]pyrid-3-ylamine, 2- acetylaminopyrazolo[1 ,5-a]pyrid-3-ylamine, 2-(morpholin-4-yl)pyrazolo[1 ,5-a]pyrid-3- ylamine, 3-aminopyrazolo[1 ,5-a]pyridine-2-carboxylic acid, 2-methoxypyrazolo[1 ,5- a]pyrid-3-ylamine, (3-aminopyrazolo[1 ,5-a]pyrid-7-yl)methanol, 2-(3-aminopyrazolo[1 ,5- a]pyrid-5-yl)ethanol, 2-(3-aminopyrazolo[1 ,5-a]pyrid-7-yl)ethanol, (3-aminopyrazolo[1 ,5- a]pyrid-2-yl)
  • a cationic or non-cationic 5- to 7-membered heterocycloalkyl group comprising from 1 to 3 heteroatoms, optionally substituted with one or more (CrC 6 )alkyl groups such as di(Ci-C 4 )alkylpiperazinium;
  • pyrimidine derivatives mention may be made of the compounds described, for example, in patents DE 2359399, JP 88169571 , JP 05-63124 and EP 0 770 375 or patent application WO 96/15765, such as 2,4,5,6-tetraaminopyrimidine, 4- hydroxy-2,5,6-triaminopyrimidine, 2-hydroxy-4,5,6-triaminopyrimidine, 2,4-dihydroxy-5,6- diaminopyrimidine, 2,5,6-triaminopyrimidine and the addition salts thereof, and the tautomeric forms thereof, when a tautomeric equilibrium exists.
  • 2,4,5,6-tetraaminopyrimidine 4- hydroxy-2,5,6-triaminopyrimidine, 2-hydroxy-4,5,6-triaminopyrimidine, 2,4-dihydroxy-5,6- diaminopyrimidine, 2,5,6-triaminopyrimidine and the addition salts thereof, and the tautomeric
  • the heterocyclic oxidation bases of the invention are chosen from 4,5-diaminopyrazoles such as 4,5-diamino-1 -(p-hydroxyethyl)pyrazole. Use may also be made of 4,5-diamino-1 -(p- methoxyethyl)pyrazole.
  • Use will preferably be made of a 4,5-diaminopyrazole and even more preferentially of 4,5-diamino-1 -(p-hydroxyethyl)pyrazole and/or a salt thereof.
  • Pyrazole derivatives that may also be mentioned include diamino-N,N- dihydropyrazolopyrazolones and in particular those described in patent application FR-A- 2 886 136, such as the following compounds and the addition salts thereof: 2,3-diamino- 6,7-dihydro-1 H,5H-pyrazolo[1 ,2-a]pyrazol-1 -one, 2-amino-3-ethylamino-6,7-dihydro- 1 H,5H-pyrazolo[1 ,2-a]pyrazol-1 -one, 2-amino-3-isopropylamino-6,7-dihydro-1 H,5H- pyrazolo[1 ,2-a]pyrazol-1 -one, 2-amino-3-(pyrrolidin-1 -yl)-6,7-dihydro-1 H,5H-pyrazolo[1 ,2- a]pyrazol-1 -one, 4,5-di
  • Use will preferably be made of 2,3-diamino-6,7-dihydro-1 H,5H-pyrazolo[1 ,2- a]pyrazol-1 -one and/or a salt thereof.
  • Heterocyclic bases that will preferentially be used include 4,5-diamino-1 -(p- hydroxyethyl)pyrazole and/or 2,3-diamino-6,7-dihydro-1 H,5H-pyrazolo[1 ,2-a]pyrazol-1 - one and/or a salt thereof.
  • the total content of oxidation bases used in the context of the anhydrous composition ii) is between 0.001 % and 20% by weight of the total weight of the composition ii) of the packaging article, preferably from 0.01 % to 10% by weight, and preferably from 0.1 % to 6% by weight, relative to the total weight of the composition.
  • the couplers that are conventionally used for the dyeing of keratin fibres may be chosen from the meta-phenylenediamines, meta-aminophenols, meta-diphenols, naphthalene-based couplers and heterocyclic couplers, and also the addition salts thereof.
  • Examples that may be mentioned include 1 ,3-dihydroxybenzene, 1 ,3-dihydroxy-2- methylbenzene, 4-chloro-1 ,3-dihydroxybenzene, 1 -hydroxy-3-aminobenzene, 2-methyl-5- aminophenol, 3-amino-2-chloro-6-methylphenol, 2-methyl-5-hydroxyethylaminophenol, 2,4-diamino-1 -(3-hydroxyethyloxy)benzene, 2-amino-4-(3-hydroxyethylamino)-1 - methoxybenzene, 1 ,3-diaminobenzene, 1 ,3-bis(2,4-diaminophenoxy)propane, 3- ureidoaniline, 3-ureido-1 -dimethylaminobenzene, sesamol, thymol, 1 - ⁇ - hydroxyethylamino-3,4-methylenedioxybenzene, a-napht
  • addition salts of the oxidation bases and couplers that may be used within the context of the invention are in particular chosen from the addition salts with an acid such as the hydrochlorides, hydrobromides, sulfates, citrates, succinates, tartrates, lactates, tosylates, benzenesulfonates, phosphates and acetates.
  • an acid such as the hydrochlorides, hydrobromides, sulfates, citrates, succinates, tartrates, lactates, tosylates, benzenesulfonates, phosphates and acetates.
  • the colouring agent is an oxidation dye, preferably chosen from oxidation bases such as para-phenylenediamines, bis(phenyl)alkylenediamines, para- aminophenols, ortho-aminophenols and heterocyclic bases, and the addition salts thereof, and couplers, chosen from meta-phenylenediamines, meta-aminophenols, meta- diphenols, naphthalene-based couplers and heterocyclic couplers, and also the addition salts thereof; and mixtures thereof.
  • oxidation bases such as para-phenylenediamines, bis(phenyl)alkylenediamines, para- aminophenols, ortho-aminophenols and heterocyclic bases, and the addition salts thereof
  • couplers chosen from meta-phenylenediamines, meta-aminophenols, meta- diphenols, naphthalene-based couplers and heterocyclic couplers, and also the addition salts thereof; and mixtures thereof.
  • the oxidation coupler(s) are generally present in an amount included in the range from 0.001 % to 20% by total weight of the composition ii) of the packaging article, preferably from 0.01 % to 10% by weight, and preferably from 0.1 % to 6% by weight, relative to the total weight of the composition.
  • the addition salts of the oxidation bases and couplers that may be used within the context of the invention are in particular chosen from the addition salts with an acid such as the hydrochlorides, hydrobromides, sulfates, citrates, succinates, tartrates, lactates, tosylates, benzenesulfonates, phosphates and acetates.
  • the composition ii) of the packaging article comprises, as agent, at least one direct dye.
  • the direct dye(s) may be synthetic or natural dyes, chosen from ionic or non-ionic species, preferably cationic or non-ionic species.
  • said direct dyes are in anhydrous powder or paste form.
  • the composition ii) does not comprise any oxidation dye as a mixture with said direct dye(s).
  • the direct dye(s) is (are) mixed with one or more oxidation dyes in the composition ii), in the same cavity.
  • the direct dye(s) is (are) in a cavity of the packaging article separated from the oxidation dye(s) by one or more sheets as defined previously defining a cavity in which said direct dye(s) is (are) housed.
  • the direct dye(s) is (are) separated from the oxidation dyes by a sheet.
  • the direct dye(s) may be chosen from synthetic direct dyes and natural direct dyes.
  • a synthetic direct dye is understood to be any direct dye that does not exist in the natural state, including dyes obtained semi-synthetically. Examples of suitable synthetic direct dyes that may be mentioned include azo, methine, carbonyl, azine, xanthene, nitro(hetero)aryl, tri(hetero)arylmethane, (metallo)porphyrin and phthalocyanine direct dyes, alone or as mixtures.
  • azo direct dyes examples include the following dyes, described in Colour Index International, 3rd edition:
  • one of the nitrogen or carbon atoms of the sequences may be part of a ring.
  • the methine dyes are derived from methine, azomethine, hydrazono, mono- and diarylmethane, indoamine (or diphenylamine), indophenol, indoaniline and (hemi)cyanine compounds, such as styryl, streptocyanine, carbocyanine, azacarbocyanine, diazacarbocyanine and tetraazacarbocyanine, such as tetraazapentamethine, dyes, and optical and geometric isomers thereof.
  • azo, azomethine, methine or tetraazapentamethine direct dyes that may be used according to the invention, mention may be made of the cationic dyes described in patent applications WO 95/15144, WO 95/01772 and EP 714954; FR 2189006, FR 2285851 , FR 2140205, EP 1378544, EP 1674073.
  • indoamine dyes that may be used according to the invention, mention may be made of the following compounds:
  • X " representing an anion preferably chosen from chloride, iodide, methyl sulfate, ethyl sulfate, acetate and perchlorate.
  • the synthetic direct dyes of the carbonyl family examples include dyes chosen from quinone, acridone, benzoquinone, anthraquinone, naphthoquinone, benzanthrone, anthranthrone, pyranthrone, pyrazolanthrone, pyrimidinoanthrone, flavanthrone, idanthrone, flavone, (iso)violanthrone, isoindolinone, benzimidazolone, isoquinolinone, anthrapyridone, pyrazoloquinazolone, perinone, quinacridone, quinophthalone, indigoid, thioindigo, naphthalimide, anthrapyrimidine, diketopyrrolopyrrole and coumarin dyes.
  • azine As regards the synthetic direct dyes of the azine family, mention may be made in particular of azine, fluorindine, acridine, (di)oxazine and (di)thiazine dyes.
  • azine dyes examples include the following compounds:
  • nitro(hetero)aryl synthetic direct dyes are more particularly nitrobenzene or nitropyridine direct dyes.
  • nitrobenzene direct dyes that may be used according to the invention, mention may be made in a nonlimiting manner of the following compounds:
  • triarylmethane dyes that may be used according to the invention, mention may be made of the following compounds:
  • cationic or non-cationic compounds optionally comprising one or more metals or metal ions, for instance alkali metals and alkaline-earth metals, zinc and silicon.
  • nitrobenzene dyes examples include nitrobenzene dyes; azo, methine, azomethine, hydrazono or styryl direct dyes; azacarbocyanines such as tetraazacarbocyanines (tetraazapentamethines); quinone direct dyes, and in particular anthraquinone, naphthoquinone or benzoquinone direct dyes; azine direct dyes; xanthene direct dyes; triarylmethane direct dyes; indoamine direct dyes, indigoid direct dyes, phthalocyanine direct dyes and porphyrin direct dyes, alone or as mixtures.
  • nitrobenzene dyes examples include nitrobenzene dyes; azo, methine, azomethine, hydrazono or styryl direct dyes; azacarbocyanines such as tetraazacarbocyanines (tetraazapentameth
  • These dyes may be monochromophoric dyes (i.e. comprising only one dye) or polychromophoric, preferably di- or trichromophoric; the chromophores possibly being identical or different, and from the same chemical family or otherwise.
  • a polychromophoric dye comprises a plurality of groups each derived from a molecule that absorbs in the visible region between 400 and 800 nm. Furthermore, this absorbance of the dye does not require any prior oxidation thereof, or combination with any other chemical species.
  • the chromophores are connected together by means of at least one linker L, which may be cationic or non-cationic.
  • the linker L is preferably a linear, branched or cyclic C1-C2 0 alkyl chain which is optionally interrupted and/or terminated with at least i) a heteroatom (such as nitrogen N(R), N + R, R', Q " , oxygen or sulfur), ii) a group C(O), C(S), S(O), or S(0) 2 or iii) a combination thereof, optionally interrupted with at least one heterocycle which may or may not be fused to a phenyl nucleus, and which comprises at least one quaternized nitrogen atom forming part of said ring system, and optionally at least one other heteroatom (such as oxygen, nitrogen or sulfur), optionally interrupted with at least one substituted or unsubstituted phenyl or naphthyl group, optionally at least one quaternary ammonium group substituted with two C1-C15 alkyl groups which are optionally substituted; the linker does not contain a nitro, nitroso or peroxo
  • heterocycles or aromatic nuclei are substituted, for example, with one or more CrC 8 alkyl groups optionally substituted with a hydroxyl, C C 2 alkoxy, C 2 -C 4 hydroxyalkoxy, acetylamino or amino group substituted with one or two Ci-C 4 alkyl groups, optionally bearing at least one hydroxyl group, or the two groups possibly forming, with the nitrogen atom to which they are attached, a 5- or 6-membered heterocycle, optionally comprising another nitrogen or non-nitrogen heteroatom; a halogen atom; a hydroxyl group; a Ci-C 2 alkoxy group; a C 2 -C 4 hydroxyalkoxy group; an amino group; an amino group substituted with one or two identical or different Ci-C 4 alkyl groups, optionally bearing at least one hydroxyl group.
  • the dye(s) are chosen from (poly)azo dyes such as (di)azo dyes; hydrazono dyes; (poly)methine dyes such as styryl dyes; anthraquinone dyes and naphthalimide dyes.
  • these dyes are (poly)cationic.
  • the dyes are chosen from cationic dyes known as "basic dyes".
  • Het + represents a cationic heteroaryl group, preferably bearing an intracyclic cationic charge, such as imidazolium, indolium or pyridinium, optionally substituted with one or more (Ci-C 8 ) alkyl groups such as methyl;
  • Ar + represents an aryl group, such as phenyl or naphthyl, bearing an exocyclic cationic charge, preferentially ammonium, particularly tri(CrC 8 alkyl)ammonium such as trimethylammonium;
  • Ar represents an aryl group, in particular phenyl, which is optionally substituted, preferentially with one or more electron-donating groups such as i) optionally substituted Ci-C 8 alkyl, ii) optionally substituted Ci-C 8 alkoxy, iii) (di)(Ci-C 8 alkyl)amino optionally substituted on the alkyl group(s) with a hydroxyl group, iv) aryl(Ci-C 8 alkyl)amino, or v) optionally substituted N-(Ci-C 8 alkyl)-N-aryl(Ci-C 8 alkyl)amino, or alternatively Ar represents a julolidine group;
  • - Ar' is an optionally substituted divalent (hetero)arylene group such as phenylene, particularly para-phenylene, or naphthalene, which are optionally substituted, preferably with one or more Ci-C 8 alkyl, hydroxyl or Ci-C 8 alkoxy groups;
  • Ar is an optionally substituted (hetero)aryl group such as phenyl or pyrazolyl, which are optionally substituted, preferably with one or more Ci-C 8 alkyl, hydroxyl, (di)(Ci-C 8 alkyl)amino, Ci-C 8 alkoxy or phenyl groups;
  • R a and R b which may be identical or different, represent a hydrogen atom or a Ci-C 8 alkyl group, which is optionally substituted, preferentially with a hydroxyl group;
  • R a and R b represent a hydrogen atom or a CrC 4 alkyl group, which is optionally substituted with a hydroxyl group;
  • Q " represents an organic or mineral anionic counterion, such as a halide or an alkyl sulfate.
  • the dyes of the invention are cationically charged, intracyclic, azo and hydrazono dyes of formulae (I), ( ⁇ ) and (II) as defined previously.
  • the dyes of formulae (I), ( ⁇ ) and (II) described in patent applications WO 95/15144, WO 95/01772 and EP 714954 are more particularly preferred.
  • Dyes of the invention are preferably chosen from the following compounds:
  • R 1 represents a Ci-C 4 alkyl group such as methyl
  • R 2 and R 3 which may be identical or different, represent a hydrogen atom or a C C 4 alkyl group such as methyl;
  • R 4 represents a hydrogen atom or an electron-donating group such as optionally substituted Ci-C 8 alkyl, optionally substituted Ci-C 8 alkoxy, or (di)(CrC 8 alkyl)amino optionally substituted on the alkyl group(s) with a hydroxyl group; particularly, R 4 is a hydrogen atom;
  • - Z represents a CH group or a nitrogen atom, preferentially CH
  • the dyes of formulae (1-1 ) and (11-1 ) are chosen from Basic Red 51 , Basic Yellow 87 and Basic Orange 31 or their derivatives:
  • Q " is as defined previously, and represents in particular a halide such as a chloride, or an alkyl sulfate such as methyl sulfate or mesityl.
  • polychromophoric dyes comprising on the one hand at least one 5- or 6-membered aromatic heterocycle, optionally fused, which comprises at least one quaternized nitrogen atom forming part of said heterocycle, and optionally at least one other heteroatom (such as nitrogen, sulfur or oxygen), and, on the other hand, at least one optionally substituted phenyl or naphthyl group optionally bearing at least one group OR in which R represents a hydrogen atom, an optionally substituted Ci-C 6 alkyl group, an optionally substituted phenyl nucleus, or at least one group N(R') 2 with R', which may be identical or different, representing a hydrogen atom, an optionally substituted Ci-C 6 alkyl group or an optionally substituted phenyl nucleus; the groups R' possibly forming, with the nitrogen
  • Aromatic cationic heterocycles that may preferably be mentioned include 5- or 6- membered rings containing 1 to 3 nitrogen atoms and preferably 1 or 2 nitrogen atoms, one being quaternized; said heterocycle moreover being optionally fused to a benzene nucleus. It should similarly be noted that the heterocycle may optionally comprise another heteroatom other than nitrogen, for instance sulfur or oxygen.
  • heterocycles or phenyl or naphthyl groups are substituted, for example, with one or more Ci-C 8 alkyl groups optionally substituted with a hydroxyl, CrC 2 alkoxy, C 2 -C 4 hydroxyalkoxy, acetylamino or amino group substituted with one or two C C 4 alkyl groups, optionally bearing at least one hydroxyl group, or the two groups possibly forming, with the nitrogen atom to which they are attached, a 5- or 6- membered heterocycle, optionally comprising another nitrogen or non-nitrogen heteroatom; a halogen atom; a hydroxyl group; a Ci-C 2 alkoxy group; a C 2 -C 4 hydroxyalkoxy group; an amino group; an amino group substituted with one or two identical or different d-C 4 alkyl groups, optionally bearing at least one hydroxyl group.
  • the bonding between the linker L and each chromophore generally takes place via a heteroatom substituent on the phenyl or naphthyl nucleus or via the quaternized nitrogen atom of the cationic heterocycle.
  • the dye may comprise identical or different chromophores.
  • EP 1 637 566 EP 1 619 221 , EP 1 634 926, EP 1 619 220, EP 1 672 033, EP 1 671 954, EP 1 671 955, EP 1 679 312, EP 1 671 951 , EP 167 952, EP 167 971 , WO 06/063 866, WO 06/063 867, WO 06/063 868, WO 06/063 869, EP 1 408 919, EP 1 377 264, EP 1 377 262, EP 1 377 261 , EP 1 377 263, EP 1 399 425, EP 1 399 1 17, EP 1 416 909, EP 1 399 1 16 and EP 1 671 560.
  • EP 1 006 153 which describes dyes comprising two chromophores of anthraquinone type connected via a cationic linker
  • EP 1 433 472, EP 1 433 474, EP 1 433 471 and EP 1 433 473 which describe identical or different dichromophoric dyes, connected via a cationic or non-cationic linker
  • EP 6 291 333 which in particular describes dyes comprising three chromophores, one of them being an anthraquinone chromophore, to which are attached two chromophores of azo or diazacarbocyanine type or an isomer thereof.
  • natural dyes is intended to mean any dye or dye precursor that is naturally occurring and that is produced either by extraction (and possibly purification) from a plant or animal matrix, optionally in the presence of natural compounds such as ash or ammonia, or by chemical synthesis.
  • Natural dyes that may be mentioned include lawsone, henna, curcumin, chlorophyllin, alizarin, kermesic acid, purpurin, purpurogallin, indigo, Tyrian purple, sorghum, carminic acid, catechin, epicatechin, juglone, bixin, betanin, quercetin, chromene dyes and chroman dyes, including haematein and brazilein, and laccaic acids, alone or as a mixture.
  • the natural dyes used in the invention are chosen from curcumin, chlorophyllin, chromene dyes, chroman dyes and laccaic acids.
  • chromene dye and "chroman dye” mean dyes which comprise in their structure at least one bicycle of formula (IV) below:
  • the dyes having in their structure a bicycle of formula (IV) are chosen from the dyes having the following formulae:
  • i) represents a carbon-carbon single bond or a carbon-carbon double bond, the sequence of these bonds denoting two carbon-carbon single bonds and two carbon-carbon double bonds, said bonds being conjugated,
  • X represents a group:
  • R 1 , R 2 , R 3 , R 4 , R 5 and R 6 which may be identical or different, represent, independently of each other, a hydrogen atom, a hydroxyl group, an optionally substituted alkyl group, an optionally substituted alkoxy group or an optionally substituted acyloxy group,
  • Rii - Rii , Ri2, Ri3, Ri6, Ri9 and R 2 o which may be identical or different, represent, independently of each other, a hydrogen atom or a C 1 -C4 alkyl group,
  • R-I4, R-I5, R-I7 and Ri 8 which may be identical or different, represent, independently of each other, a hydrogen atom, a hydroxyl group or a C 1 -C4 alkoxy group, and also the tautomeric and/or mesomeric forms thereof, the stereoisomers thereof, the addition salts thereof with a cosmetically acceptable acid or base, and the hydrates thereof.
  • alkyi groups mentioned in the preceding definitions of the substituents are linear or branched, saturated hydrocarbon groups, generally Ci-C 2 o, particularly C1-C1 0 and preferably Ci-C 6 , such as methyl, ethyl, propyl, butyl, pentyl and hexyl.
  • the alkoxy groups are alkyl-oxy groups with alkyi groups as defined previously and preferably the alkoxy groups are C1-C1 0 , such as methoxy, ethoxy, propoxy and butoxy.
  • alkyi or alkoxy groups when they are substituted, may be substituted with at least one substituent borne by at least one carbon atom, chosen from:
  • an optionally cationic 5- or 6-membered heteroaryl group preferentially imidazolium, optionally substituted with a (CrC 4 )alkyl group, preferentially methyl;
  • an acylamino group (-NR-COR') in which the group R is a hydrogen atom or a C1-C4 alkyl group optionally bearing at least one hydroxyl group and the group R' is a Ci-C 2 alkyl group;
  • R'S0 2 -NR- an alkylsulfonylamino group in which the group R represents a hydrogen atom or a C1-C4 alkyl group optionally bearing at least one hydroxyl group and the group R' represents a C1-C4 alkyl group, or a phenyl group;
  • an aminosulfonyl group ((R) 2 N-S0 2 -) in which the groups R, which may be identical or different, represent a hydrogen atom or a C1-C4 alkyl group optionally bearing at least one hydroxyl group;
  • glycosyl group is intended to mean a group originating from a mono- or polysaccharide.
  • the alkyl or alkoxy groups of formula (V) are unsubstituted.
  • the dyes of formula (V) comprise a group R 6 which represents a hydroxyl group.
  • Another particular embodiment of the invention relates to the dyes of formula (V), for which the group R 1 represents a hydrogen atom or a hydroxyl group.
  • the dyes of formula (V) are chosen from haematein and brazilein.
  • Brazilein is a conjugated form of a chroman compound of formula IV-2.
  • the tautomeric structures (Va) and (Vb) illustrated above are found in the scheme below.
  • Brazilein and haematein or the haematoxylin/haematein and brazilin/brazilein pairings may be obtained synthetically or by extraction of plants known to be rich in these dyes.
  • the dyes of formula (V) may be used in the form of extracts. Use may be made of the following plant extracts (genus and species): Haematoxylon campechianum, Haematoxylon brasiletto, Caesalpinia echinata, Caesalpinia sappan, Caesalpinia spinosa and Caesalpinia brasiliensis.
  • the extracts are obtained by extracting the various plant parts, for instance the roots, the wood, the bark or the leaves.
  • the natural dyes of formula (V) are obtained from logwood, pernambuco wood, sappan wood and Brazil wood.
  • the salts of the dyes of formulae (V) and (VI) of the invention may be salts of cosmetically acceptable acids or bases.
  • the acids may be mineral or organic.
  • the acid is hydrochloric acid, which results in chlorides.
  • the bases may be mineral or organic.
  • the bases are alkali metal hydroxides such as sodium hydroxide which leads to sodium salts.
  • the dye(s) of formulae (V) and (VI) included in the composition according to the invention are derived from plant extracts. Use may also be made of mixtures of plant extracts.
  • the natural extracts of the dyes according to the invention may be in the form of powders or liquids. Preferably, the extracts are provided in powder form.
  • the natural dyes are chosen from laccaic acids.
  • laccaic acid is intended to mean a compound having in its structure a unit of the type:
  • the laccaic acids of the invention are of formula (VII) below:
  • R-i denoting a phenyl group substituted with at least one hydroxyl group, and preferably with a hydroxyl group that is advantageously in the ortho position relative to the bond attaching it to the fused nuclei.
  • the phenyl group Ri comprises, besides a hydroxyl group, at least one group -CH 2 R 2 , R 2 denoting an acetamidomethyl (CH 3 CONHCH 2 -), hydroxymethyl (HOCH 2 -) or 2-aminoacetic acid group (H0 2 C(NH 2 )CH-).
  • the laccaic acids of the invention are chosen from laccaic acids A, B, C and D, or mixtures thereof, and more particularly chosen from A, B and C, or mixtures thereof.
  • a laccaic acid according to the invention that may in particular be used is the dye CI Natural Red 25, CI 75450, CAS - 60687-93-6, which is often referred to as laccaic acid.
  • This is a dye of natural origin originating from the secretions of an insect, Coccus laccae (Lacifer Lacca Kerr), which is generally found on the twigs of certain trees native to South-East Asia.
  • CI Natural Red 25 generally contains two major constituents in its composition: laccaic acid A and laccaic acid B. It may also contain a small amount of laccaic acid C.
  • the natural direct dyes are chosen from haematein and brazilein.
  • Suitable direct dyes include azo direct dyes; (poly)methine dyes such as cyanins, hemicyanins and styryls; carbonyl dyes; azine dyes; nitro(hetero)aryl dyes; tri(hetero)arylmethane dyes; porphyrin dyes; phthalocyanine dyes, and natural direct dyes, alone or as mixtures.
  • the direct dye(s) more particularly represent from 0.001 % to 20% by weight of the total weight of the composition ii) or of the compositions contained in the packaging article, preferably from 0.01 % to 10% by weight, and preferably from 0.1 % to 6% by weight relative to the total weight.
  • the colouring agent(s) more particularly represent a total content of from 0.001 % to 20% by weight of the total weight of the composition ii) or of the compositions contained in the packaging article, preferably from 0.01 % to 10% by weight, and preferably from 0.1 % to 6% by weight relative to the total weight.
  • the packaging article is free of direct dye.
  • the anhydrous composition ii) of the packaging article of the invention may comprise one or more chemical oxidizing agents, preferably in powder or paste form.
  • chemical oxidizing agent is intended to mean an oxidizing agent other than atmospheric oxygen.
  • the chemical oxidizing agent(s) is (are) chosen from peroxygenated salts, for instance persulfates, perborates, peracids and precursors thereof, percarbonates of alkali metals or alkaline-earth metals, such as sodium carbonate peroxide also known as sodium percarbonate and peracids and precursors thereof; peroxygenated salts, for instance persulfates, perborates, peracids and precursors thereof, percarbonates of alkali metals or alkaline-earth metals such as sodium carbonate peroxide also known as sodium percarbonate and peracids and precursors thereof: alkali metal bromates or ferricyanides, hydrogen peroxide-generating solid chemical oxidizing agents such as urea peroxide and polymeric complexes that can release hydrogen peroxide, in particular those comprising a heterocyclic vinyl monomer such as polyvinylpyrrolidone/H 2 02 complexes, in particular in the form of powders; oxidases that produce hydrogen peroxid
  • the chemical oxidizing agent(s) is (are) chosen from percarbonates of alkali metals or alkaline-earth metals, preferably such as sodium carbonate peroxide, also known as sodium percarbonate.
  • the oxidizing agent is chosen from complexes of hydrogen peroxide and of polymer containing as monomer at least one heterocyclic vinyl monomer.
  • the heterocyclic vinyl monomer is chosen from monomers comprising a 4- to 6-membered heterocycle, optionally fused to a benzene ring and comprising from 1 to 4 identical or different intracyclic heteroatoms; the number of intracyclic heteroatoms being less than the number of ring members of the heterocycle.
  • the number of intracyclic heteroatoms is 1 or 2.
  • the heteroatom(s) are chosen from sulfur, oxygen and nitrogen, preferably from nitrogen and oxygen.
  • the monomer comprises at least one intracyclic nitrogen atom.
  • the vinyl heterocycle may optionally be substituted with one or more C1-C4 and preferably Ci-C 2 alkyl groups.
  • the heterocyclic monomer is chosen from /V-vinyl monomers.
  • the monomers that may be envisaged, mention may be made of the following optionally substituted monomers: N-vinylpyrrolidone, vinylcaprolactam, N- vinylpiperidone, N-vinyl-3-morpholine, N-vinyl-4-oxazolinone, 2-vinylpyridine, 4- vinylpyridine, 2-vinylquinoline, 1 -vinylimidazole and 1 -vinylcarbazole.
  • the monomer is optionally substituted N-vinylpyrrolidine.
  • the polymer is a homopolymer.
  • the comonomer(s) are chosen from vinyl acetate, (meth)acrylic acids, (meth)acrylamides and C1-C4 alkyl esters of (meth)acrylic acid, which may be substituted or unsubstituted.
  • the polymer participating in this complex is preferably water-soluble. It may have variable average molecular weights, preferably between 10 3 and 3x10 6 g/mol and preferably between 10 3 and 2x10 6 g/mol. It is also possible to use mixtures of such polymers.
  • said complex comprises from 10% to 30% by weight, more particularly from 13% to 25% by weight and preferably from 18% to 22% by weight of hydrogen peroxide relative to the total weight of the complex.
  • the mole ratio between the heterocyclic vinyl monomer(s) and the hydrogen peroxide ranges from 0.5 to 2 and preferably from 0.5 to 1.
  • This complex is advantageously in the form of a substantially anhydrous powder.
  • Complexes of this type are in particular described in US 5 008 106, US 5 077 047, EP 832 846, EP 714 919, DE 4344131 and DE 195 45 380 and the other polymer complexes described in US 5 008 093, US 3 376 1 10 and US 5 183 901.
  • complexes examples include products such as
  • the anhydrous composition ii) of the packaging article contains one or more solid chemical oxidizing agent(s).
  • the chemical oxidizing agent(s) is (are) chosen from a) urea peroxide, b) polymer complexes that can release hydrogen peroxide, chosen from polyvinylpyrrolidone/H202 complexes; c) perborates and d) percarbonates; preferably, the packaging article contains as chemical oxidizing agents one or more percarbonates.
  • composition ii) of the packaging article according to the invention advantageously contains from 1 % to 80% by weight of chemical oxidizing agent, preferably from 5% to 70% by weight and preferably from 10% to 60% by weight, relative to the total weight of the composition ii).
  • the composition ii) comprises at least one colouring agent chosen from oxidation dyes, direct dyes and/or mixtures thereof, preferably from oxidation dyes
  • the dyeing process preferably uses at least one chemical oxidizing agent.
  • the chemical oxidizing agent may also be present in the composition ii) as a mixture with the colouring agent.
  • the chemical oxidizing agent may be present in an anhydrous composition ii') which is in a cavity of the envelope other than that comprising the anhydrous composition ii) of the packaging article according to the invention.
  • the packaging article does not comprise any oxidizing agent.
  • the packaging article may be either first dissolved in an aqueous composition to which is then added at least one chemical oxidizing agent, or directly dissolved in an oxidizing composition comprising at least one chemical oxidizing agent.
  • the oxidizing agent may be a chemical oxidizing agent such as hydrogen peroxide.
  • the chemical oxidizing agent may also be added to the aqueous composition in the form of a packaging article as previously defined in a composition which is inside a cavity of an envelope not containing any colouring agent.
  • the anhydrous composition ii) of the packaging article may contain other ingredients.
  • composition ii) may contain one or more alkaline agents.
  • the alkaline agent(s) may be in the packaging article either combined with the oxidation dyes, or separated from the dyes by one or more sheets as defined previously.
  • the alkaline agent(s) are more particularly chosen from silicates and metasilicates such as alkali metal metasilicates, carbonates or hydrogen carbonates of alkali metals or alkaline-earth metals, such as lithium, sodium, potassium, magnesium, calcium or barium, and mixtures thereof.
  • the alkaline agent(s) are chosen from alkali metal silicates, metasilicates and carbonates, and mixtures thereof.
  • the concentration of alkaline agents advantageously represents from 0.01 % to
  • composition(s) contained in the packaging article 40% by weight and preferably from 0.1 % to 30% by weight relative to the total weight of the composition(s) contained in the packaging article.
  • the anhydrous composition ii) of the packaging article comprises at least one starch or one modified starch, preferably at least one modified starch.
  • the starches that can be used in the composition ii) of the packaging article of the present invention can originate from any plant starch source, in particular cereals and tubers; more particularly, they can be starches from maize, rice, cassava, barley, potato, wheat, sorghum, pea, oat or tapioca. Use may also be made of the hydrolysates of the abovementioned starches.
  • the starch is preferably derived from potato.
  • the starches can be chemically or physically modified.
  • the starch used in the present invention is modified by at least one of the following reactions: pregelatinization, oxidation, crosslinking, esterification, etherification, amidation, heat treatments.
  • said starch(es) is (are) modified by at least one of the following reactions: pregelatinization, oxidation, crosslinking and/or esterification
  • the starch used in the present invention is modified by crosslinking, preferably with phosphate groups, and/or by esterification, preferably by grafting functional groups, in particular CrC 6 acyl (acetyl), Ci-C 6 hydroxyalkyl (hydroxyethyl, hydroxypropyl), carboxymethyl and/or octenylsuccinic groups.
  • crosslinking preferably with phosphate groups
  • esterification preferably by grafting functional groups, in particular CrC 6 acyl (acetyl), Ci-C 6 hydroxyalkyl (hydroxyethyl, hydroxypropyl), carboxymethyl and/or octenylsuccinic groups.
  • Monostarch phosphates (of the type Am-0-PO-(OX) 2 ), distarch phosphates (of the type Am-O-PO-(OX)-O-Am) or even tristarch phosphates (of the type Am-0-PO-(0-Am) 2 ) or mixtures thereof may in particular be obtained by crosslinking with phosphorus compounds, Am meaning starch and X in particular denoting alkali metals (for example sodium or potassium), alkaline earth metals (for example calcium or magnesium), ammonium salts, amine salts, for instance those of monoethanolamine, diethanolamine, triethanolamine, 3-amino-1 ,2-propanediol, or ammonium salts derived from basic amino acids such as lysine, arginine, sarcosine, ornithine or citrulline.
  • alkali metals for example sodium or potassium
  • alkaline earth metals for example calcium or magnesium
  • ammonium salts for instance those of monoethanolamine,
  • the phosphorus compounds can, for example, be sodium tripolyphosphate, sodium orthophosphate, phosphorus oxychloride or sodium trimetaphosphate.
  • distarch phosphates or compounds rich in distarch phosphate such as the product sold under the references Prejel VA-70-T AGGL (gelatinized hydroxypropyl cassava distarch phosphate) or the gelatinized cassava distarch phosphate sold under the reference Prejel TK1 or the gelatinized acetyl cassava distarch phosphate sold under the reference Prejel 200 by the company Avebe, or the pregelatinized hydroxypropyl corn distarch phosphate compound, the INCI name of which is hydroxypropyl starch phosphate, sold under the referencer Structure Zea by Akzo Nobel.
  • Prejel VA-70-T AGGL gelatinized hydroxypropyl cassava distarch phosphate
  • Prejel TK1 gelatinized acetyl cassava distarch phosphate sold under the reference Prejel 200 by the company Avebe
  • pregelatinized hydroxypropyl corn distarch phosphate compound the INCI name of
  • pregelatinized hydroxypropyl corn distarch phosphate is used.
  • a preferred starch is a starch that has undergone at least one chemical modification such as at least one esterification.
  • amphoteric starches comprising one or more anionic groups and one or more cationic groups may also be used.
  • the anionic and cationic groups can be bonded to the same reactive site of the starch molecule or to different reactive sites; they are preferably bonded to the same reactive site.
  • the anionic groups can be of carboxylic, phosphate or sulfate type, preferably of carboxylic type.
  • the cationic groups can be of primary, secondary, tertiary or quaternary amine type.
  • amphoteric starches are in particular chosen from the compounds having the following formulae: St - 0 - (CH 2 ) n - N
  • St-0 represents a starch molecule
  • R which may be identical or different, represents a hydrogen atom or a methyl radical
  • R' which may be identical or different, represents a hydrogen atom, a methyl radical or a group -C(0)-OH;
  • n is an integer equal to 2 or 3;
  • M which may be identical or different, denotes a hydrogen atom, an alkali metal or alkaline-earth metal such as Na, K or Li, a quaternary ammonium NH 4 , or an organic amine,
  • R" represents a hydrogen atom or a Ci-Ci 8 alkyl radical.
  • starches of formulae (II) or (III) Use is in particular made of the starches of formulae (II) or (III); and preferably starches modified with 2-chloroethylaminodipropionic acid, that is to say the starches of formula (II) or (III) in which R, R', R" and M represent a hydrogen atom and n is equal to 2.
  • the preferred amphoteric starch is a starch chloroethylamidodipropionate.
  • pregelatinized hydroxypropyl corn distarch phosphate for example sold by Akzo Nobel
  • sodium carboxymethyl starch for example sold by Roquette
  • sodium starch glycolate for example sold under the reference Explotab
  • partially pregelatinized starches for instance those sold under the references Starch 1500 or Lycotab.
  • Use is preferably made of pregelatinized hydroxypropyl corn distarch phosphate and/or sodium carboxymethyl starch.
  • a starch modified by at least one of the following reactions: pregelatinization, oxidation, crosslinking, esterification, etherification, amidation, heat treatments, preferably chosen from pregelatinized hydroxypropyl corn distarch phosphate and/or sodium carboxymethyl starch and/or sodium starch glycolate and/or partially pregelatinized starches.
  • concentration of starch preferably of modified starch as previously defined, advantageously represents from 1 % to 80% by total weight, preferably from 1 % to 50% by weight, and preferably from 2% to 25% by weight, of the total weight of the composition(s) contained in the packaging article.
  • the anhydrous composition ii) of the packaging article comprises at least one cellulose, and/or cellulose derivatives.
  • the celluloses and cellulose derivatives can be anionic, cationic, amphoteric or non-ionic.
  • cellulose ethers cellulose esters and cellulose ester ethers are distinguished.
  • cellulose nitrates, sulfates or phosphates organic cellulose esters (cellulose monoacetates, triacetates, amidopropionates, acetate butyrates, acetate propionates or acetate trimellitates), and mixed organic/inorganic cellulose esters, such as cellulose acetate butyrate sulfates and cellulose acetate propionate sulfates.
  • non-ionic cellulose ethers that may be mentioned are alkylcelluloses such as methylcelluloses and ethylcelluloses (for example Ethocel Standard 100 Premium from Dow Chemical); hydroxyalkylcelluloses such as hydroxymethylcelluloses and hydroxyethylcelluloses (for example Natrosol 250 HHR sold by Aqualon) and hydroxypropylcelluloses (for example Klucel EF from Aqualon); mixed hydroxyalkyl- alkylcelluloses such as hydroxypropylmethylcelluloses (for example Methocel E4M from Dow Chemical), hydroxyethylmethylcelluloses, hydroxyethylethylcelluloses (for example Bermocoll E 481 FQ from Akzo Nobel) and hydroxybutylmethylcelluloses.
  • alkylcelluloses such as methylcelluloses and ethylcelluloses (for example Ethocel Standard 100 Premium from Dow Chemical); hydroxyalkylcelluloses such as hydroxymethylcelluloses and hydroxyethylcelluloses (for example Nat
  • carboxymethylcelluloses for example crosslinked sodium carboxymethylcelluloses, for instance sodium croscarmelloses,carboxymethylmethylcelluloses (for example Blanose 7M from the company Aqualon) and carboxymethylhydroxyethylcelluloses, and also sodium salts thereof.
  • anionic cellulose ethers use is preferably made of crosslinked sodium carboxymethylcelluloses, preferably sodium croscarmellose.
  • cationic cellulose ethers mention may be made of hydroxyethylcelluloses.
  • cationic cellulose ethers mention may be made of crosslinked or non-crosslinked quaternized hydroxyethylcelluloses.
  • the quaternizing agent may in particular be diallyldimethylammonium chloride (for example Celquat L200 from National Starch).
  • Another cationic cellulose ether that may be mentioned is hydroxypropyltrimethylammonium hydroxyethyl cellulose (for example Ucare Polymer JR 400 from Amerchol).
  • celluloses or derivatives thereof modified with groups comprising at least one fatty chain, such as alkyl, arylalkyi or alkylaryl groups or mixtures thereof in which the alkyl groups are of C8-C22; non-ionic alkylhydroxyethylcelluloses such as the products Natrosol Plus Grade 330 CS and Polysurf 67 (Ci 6 alkyl) sold by the company Aqualon; quaternized alkylhydroxyethylcelluloses (cationic), such as the products Quatrisoft LM 200, Quatrisoft LM-X 529-18-A, Quatrisoft LM-X 529-18-B (C i2 alkyl) and Quatrisoft LM-X 529-8 (Ci 8 alkyl) sold by the company Amerchol, the products Crodacel QM and Crodacel QL (Ci2 alkyl) and Crodacel QS (C
  • the celluloses and/or the cellulose derivatives are chosen from:
  • microcrystalline celluloses for instance the microcrystalline cellulose Avicel PH 105 NF sold by FMC Corporation; and/or
  • crosslinked sodium carboxymethyl celluloses preferably sodium croscarmellose.
  • the total concentration of cellulose, and/or of cellulose derivatives advantageously represents from 0.01 % to 40% by total weight, and preferably from 0.1 % to 30% by weight, of the total weight of the composition(s) contained in the packaging article.
  • the composition ii) of the packaging article according to the invention comprises at least one crosslinked polyvinylpyrrolidone, preferably crospovidone c).
  • the total concentration of crosslinked polyvinylpyrrolidone(s) represents from 0.01 % to 40% by total weight, and preferably from 0.1 % to 30% by weight, of the total weight of the composition(s) contained in the packaging article.
  • the composition ii) of the article according to the invention comprises one or more additional compound(s) chosen from:
  • starches and/or starches modified by at least one of the following reactions pregelatinization, oxidation, crosslinking, esterification, etherification, amidation, heat treatments, preferably pregelatinized hydroxypropyl corn distarch phosphate; cellulose and/or a cellulose derivative, preferably microcrystalline cellulose; and/or crosslinked sodium carboxymethylcelluloses, preferably sodium croscarmellose; crosslinked polyvinylpyrolidones, preferably crospovidone;
  • the composition ii) of the packaging article contains one or more ammonium salts.
  • the ammonium salt(s) that may be in the packaging article is (are) either combined with the oxidation dyes, or combined with the direct dyes, or separated from the dyes by one or more water-soluble sheets as defined previously defining a cavity in which said salt(s) is (are) housed.
  • the packaging article comprises one or more ammonium salts chosen from ammonium halides such as ammonium chloride, ammonium sulfate, ammonium phosphate and ammonium nitrate.
  • ammonium halides such as ammonium chloride, ammonium sulfate, ammonium phosphate and ammonium nitrate.
  • the ammonium salt is ammonium chloride or ammonium sulfate.
  • the concentration of ammonium salt(s), if they are present, is advantageously between 0.01 % and 40% by weight relative to the total weight of the composition(s) contained in the packaging article, and preferably from 0.1 % to 30% by weight relative to the total weight of the composition(s) contained in the packaging article.
  • composition ii) when in paste form, it also comprises one or more liquid fatty substances.
  • liquid is intended to mean any compound that is capable of flowing at ambient temperature, generally between 15°C and 40°C, and at atmospheric pressure, under the action of its own weight.
  • liquid fatty substances examples include the polydecenes of formula Cio n H[ ( 20n)+2] in which n ranges from 3 to 9 and preferably from 3 to 7, esters and in particular esters of fatty alcohols or of fatty acids, sugar esters or diesters of Ci 2 - C 2 4 fatty acids, cyclic esters, cyclic ethers, silicone oils, mineral oils, plant oils or animal oils, or mixtures thereof.
  • the liquid fatty substance(s) are chosen from the polydecenes of formula Cio n H[(20n)+2] in which n ranges from 3 to 9 and preferably from 3 to 7, esters of fatty alcohols or of fatty acids, liquid petroleum jelly and liquid paraffin, and mixtures thereof.
  • one or more mineral oil(s) may be in the packaging article, in particular combined with the oxidation dye(s), for instance liquid paraffin or petroleum jelly, preferably petroleum jelly.
  • the oxidation dye(s) for instance liquid paraffin or petroleum jelly, preferably petroleum jelly.
  • the content of liquid fatty substance(s), if they are present advantageously ranges from 10% to 50% by weight relative to the weight of the composition(s) contained in the packaging article, and preferably from 20% to 50% by weight relative to the weight of the composition(s) contained in the packaging article.
  • the anhydrous composition according to the invention in paste form comprising a liquid fatty substance may be advantageously prepared by dispersing, under mechanical action, all of the compounds that are in powder form in the liquid fatty substance, in which the other liquid compounds of the composition have been predispersed or premixed.
  • the paste may also be prepared by extrusion, by introducing the liquid and solid phases of the composition into an extruder and then mixing them at a temperature below 25°C using a co-rotating twin-screw system composed of transportation and blending elements.
  • the packaging article of the invention comprises one or more thickening polymer(s), these polymer(s) possibly being in said article either with the colouring agent(s) and/or the chemical oxidizing agent(s) or separated from the other ingredients by one or more water-soluble sheet(s) as defined previously.
  • the thickening polymers are different from the starches and the celluloses described previously.
  • the thickening polymers are chosen from the following polymers:
  • non-ionic amphiphilic polymers comprising at least one fatty chain and at least one hydrophilic unit
  • anionic amphiphilic polymers comprising at least one hydrophilic unit and at least one fatty-chain unit;
  • g2 gums derived from plant exudates such as gum arabic, ghatti gum, karaya gum or gum tragacanth;
  • the thickening polymers act on the viscosity of the ready-to-use composition, i.e. the composition resulting from the mixing of the packaging article according to the invention with an aqueous composition.
  • amphiphilic polymers are more particularly hydrophilic polymers that are capable, in the medium of the composition, and more particularly an aqueous medium, of reversibly combining with each other or with other molecules.
  • hydrophobic group is intended to mean a radical or polymer bearing a saturated or unsaturated, linear or branched hydrocarbon- based chain, comprising at least 8 carbon atoms, preferably at least 10 carbon atoms, preferably from 10 to 30 carbon atoms, in particular from 12 to 30 carbon atoms and more preferentially from 18 to 30 carbon atoms.
  • the hydrocarbon-based group is derived from a monofunctional compound.
  • the hydrophobic group may be derived from a fatty alcohol such as stearyl alcohol, dodecyl alcohol or decyl alcohol. It may also denote a hydrocarbon-based polymer, for instance polybutadiene.
  • the thickening polymers are preferably used in an amount that may range from 0.01 % to 15% by weight relative to the weight of the composition(s) contained in the packaging article, and preferably from 0.1 % to 10% by weight relative to the weight of the composition(s) contained in the packaging article.
  • the packaging article of the invention comprises one or more surfactants.
  • surfactants may be in said article either in the anhydrous composition ii), or separated from the other ingredients by one or more water- soluble sheets as defined previously, which define a cavity in which the surfactant(s) is (are) housed.
  • the surfactant(s) is (are) with the dye(s) and/or the chemical oxidizing agent(s) in the packaging article.
  • the term "surfactant” is intended to mean an agent comprising at least one hydrophilic group and at least one lipophilic group in its structure, and which is preferably capable of reducing the surface tension of water, and comprising in its structure, as optional repeating units, only alkylene oxide units and/or sugar units and/or siloxane units.
  • the lipophilic group is a fatty chain comprising from 8 to 30 carbon atoms.
  • surfactants may be chosen from anionic, amphoteric, non-ionic and cationic surfactants, or mixtures thereof. More particularly, the surfactants are chosen from non-ionic and anionic surfactants.
  • surfactants that are suitable for implementing the present invention are in particular the following:
  • anionic surfactants that may be used in the composition according to the invention, mention may be made of alkyl sulfates, alkyl ether sulfates, alkylamido ether sulfates, alkylaryl polyether sulfates, monoglyceride sulfates, alkylsulfonates, alkylamidesulfonates, alkylarylsulfonates, oolefin sulfonates, paraffin sulfonates, alkyl sulfosuccinates, alkyl ether sulfosuccinates, alkylamide sulfosuccinates, alkyl sulfoacetates, acylsarcosinates, acylglutamates, alkyl sulfosuccinamates, acylisethionates and N-acyltaurates, polyglycoside polycarboxylic acid and alkyl monoester salt
  • These compounds can be oxyethylenated and then preferably comprise from 1 to
  • the salts of C 6 -C 24 alkyl monoesters of polyglycoside-polycarboxylic acids may be chosen from C 6 -C 24 alkyl polyglycoside-citrates, C 6 -C 24 alkyl polyglycoside-tartrates and C 6 -C 24 alkyl polyglycoside-sulfosuccinates.
  • anionic surfactant(s) When the anionic surfactant(s) are in salt form, they may be chosen from alkali metal salts such as the sodium or potassium salt and preferably the sodium salt, ammonium salts, amine salts and in particular amino alcohol salts or alkaline-earth metal salts such as magnesium salts.
  • alkali metal salts such as the sodium or potassium salt and preferably the sodium salt, ammonium salts, amine salts and in particular amino alcohol salts or alkaline-earth metal salts such as magnesium salts.
  • amino alcohol salts that may in particular be mentioned include monoethanolamine, diethanolamine and triethanolamine salts, monoisopropanolamine, diisopropanolamine or triisopropanolamine salts, 2-amino-2-methyl-1 -propanol salts, 2- amino-2-methyl-1 ,3-propanediol salts and tris(hydroxymethyl)aminomethane salts.
  • Use is preferably made of alkali metal or alkaline-earth metal salts, and in particular sodium or magnesium salts.
  • anionic surfactants use is preferably made of (C 6 -C 2 4)alkyl sulfates, (C 6 -C 2 4)alkyl ether sulfates comprising from 2 to 50 ethylene oxide units, in particular in the form of alkali metal, ammonium, amino alcohol and alkaline-earth metal salts, or a mixture of these compounds.
  • (Ci 2 -C 2 o)alkyl sulfates (Ci 2 -C 20 )alkyl ether sulfates comprising from 2 to 20 ethylene oxide units, in particular in the form of alkali metal, ammonium, amino alcohol and alkaline-earth metal salts, or a mixture of these compounds.
  • sodium lauryl ether sulfate in particular those containing 2.2 mol of ethylene oxide, more preferentially (Ci 2 -C 20 )alkyl sulfates such as an alkali metal lauryl sulfate such as sodium lauryl sulfate.
  • amphoteric or zwitterionic surfactant(s) of the invention are preferably non- silicone, and are in particular derivatives of optionally quaternized aliphatic secondary or tertiary amines, in which derivatives the aliphatic group is a linear or branched chain comprising from 8 to 22 carbon atoms, said amine derivatives containing at least one anionic group, for instance a carboxylate, sulfonate, sulfate, phosphate or phosphonate group.
  • amphoteric or zwitterionic surfactants mentioned above use is preferably made of (C 8 -C 20 )alkylbetaines such as cocoylbetaine, and (C 8 - C 20 )alkylamido(C 3 -C 8 )alkylbetaines such as cocamidopropylbetaine, and mixtures thereof. More preferentially, the amphoteric or zwitterionic surfactant(s) are chosen from cocamidopropylbetaine and cocoylbetaine.
  • the cationic surfactant(s) that may be used in the composition according to the invention comprise, for example, optionally polyoxyalkylenated primary, secondary or tertiary fatty amine salts, quaternary ammonium salts, and mixtures thereof.
  • cationic surfactants that may be present in the composition according to the invention, it is more particularly preferred to choose from cetyltrimethylammonium, behenyltrimethylammonium and dipalmitoylethylhydroxyethylmethylammonium salts, and mixtures thereof, and more particularly behenyltrimethylammonium chloride, cetyltrimethylammonium chloride and dipalmitoylethylhydroxyethylammonium methosulfate, and mixtures thereof.
  • non-ionic surfactants examples include but not limited to, in the Handbook of Surfactants by M.R. Porter, published by Blackie & Son (Glasgow and London), 1991 , pp. 1 16-178.
  • non-ionic surfactants examples include:
  • the surfactants containing a number of moles of ethylene oxide and/or of propylene oxide ranging advantageously from 1 to 100, more particularly from 2 to 100, preferably from 2 to 50 and more advantageously from 2 to 30.
  • the non-ionic surfactants do not comprise any oxypropylene units.
  • the non-ionic surfactants are chosen from oxyethylenated C 8 -C 30 alcohols comprising from 1 to 100 mol and more particularly from 2 to 100 mol of ethylene oxide; polyoxyethylenated esters of saturated or unsaturated, linear or branched C 8 -C 30 acids and of sorbitan comprising from 1 to 100 mol and better still from 2 to 100 mol of ethylene oxide.
  • monoglycerolated or polyglycerolated non-ionic surfactants monoglycerolated or polyglycerolated non-ionic surfactants.
  • monoglycerolated or polyglycerolated C 8 -C 4 o alcohols are preferably used.
  • the monoglycerolated or polyglycerolated C 8 -C 4 o alcohols preferably correspond to formula (A8) below: R 29 0-[CH 2 -CH(CH 2 OH)-0] m -H (A8) in which formula (A8):
  • R 2 9 represents a linear or branched C 8 -C 4 o and preferably C 8 -C 3 o alkyl or alkenyl radical
  • - m represents a number ranging from 1 to 30 and preferably from 1 to 10.
  • lauryl alcohol containing 4 mol of glycerol (INCI name: Polyglyceryl-4 Lauryl Ether), lauryl alcohol comprising 1 .5 mol of glycerol, oleyl alcohol comprising 4 mol of glycerol (INCI name: Polyglyceryl-4 Oleyl Ether), oleyl alcohol containing 2 mol of glycerol (INCI name: Polyglyceryl-2 Oleyl Ether), cetearyl alcohol containing 2 mol of glycerol, cetearyl alcohol containing 6 mol of glycerol, oleocetyl alcohol containing 6 mol of glycerol, and octadecanol containing 6 mol of glycerol.
  • the alcohol of formula (A8) may represent a mixture of alcohols in the same way that the value of m represents a statistical value, which means that, in a commercial product, several species of polyglycerolated fatty alcohols may coexist in the form of a mixture.
  • the monoglycerolated or polyglycerolated alcohols it is more particularly preferred to use the C 8 /Ci 0 alcohol containing 1 mol of glycerol, the C 10 /C 12 alcohol containing 1 mol of glycerol and the C 12 alcohol containing 1 .5 mol of glycerol.
  • the non-ionic surfactant used in the process of the invention in the composition is a monooxyalkylenated or polyoxyalkylenated, particularly monooxyethylenated or polyoxyethylenated, or monooxypropylenated or polyoxypropylenated, non-ionic surfactant, or a combination thereof, more particularly monooxyethylenated or polyoxyethylenated, monoglycerolated or polyglycerolated surfactants and alkylpolyglucosides.
  • non-ionic surfactants are chosen from polyoxyethylenated sorbitan esters, polyoxyethylenated fatty alcohols and alkylpolyglucosides, and mixtures thereof.
  • the surfactant(s) when they are present more particularly represent from 0.01 % and 60% by weight relative to the total weight of the composition(s) included in the packaging article, preferably between 0.5% and 30% by weight and even more preferentially between 1 % and 20% by weight of the composition(s) included in the packaging article.
  • Cationic or amphoteric substantive polymers are particularly represented by 0.01 % and 60% by weight relative to the total weight of the composition(s) included in the packaging article, preferably between 0.5% and 30% by weight and even more preferentially between 1 % and 20% by weight of the composition(s) included in the packaging article.
  • the packaging article of the invention comprises one or more cationic or amphoteric substantive polymers.
  • These polymers may be found in said article either with the colouring agent(s) and/or the chemical oxidizing agent(s), or separated from the other ingredients by one or more water-soluble sheets as defined previously, which define a cavity in which the substantive polymer(s) are housed.
  • ix) are found with the oxidation dye(s) in the packaging article.
  • the substantive polymers are chosen from cationic polymers.
  • the substantive polymers of the quaternary polyammonium type that can be used according to the invention are as follows:
  • polymers constituted of repeating units corresponding to formula ( ⁇ ) below: -(CH 3 ) 2 N + -(CH 2 ) p -N(H)-C(0)-G-N(H)-(CH 2 ) p -(CH 3 ) 2 N + -(CH 2 ) 2 -0-(CH 2 ) 2 -, 2X " in which p denotes an integer ranging from 1 to 6 approximately, G may represent a bond or a group -(CH 2 ) r -C(0)- in which r denotes an integer equal to 4 or 7, these polymers being prepared and described in patents US 4 157 388, 4 390 689, 4 702 906 and 4 719 282; preference is given to the polymers with repeating units of formula ( ⁇ ) of which the molecular weight is less than 100 000 and preferably less than or equal to 50 000.
  • the packaging article of the invention may also comprise other additives conventionally used in cosmetics.
  • the packaging article may thus comprise fillers such as clays other than the fibrous clays; binders such as vinylpyrrolidone; lubricants such as polyol stearates or alkali metal or alkaline-earth metal stearates; hydrophilic or hydrophobic silicas; pigments; matt-effect agents or opacifiers such as titanium oxides; antioxidants such as erythorbic acid; reducing agents such as sodium metabisulfite; penetrants or sequestrants such as ethylenediaminetetraacetic acid or salts thereof; moisture absorbers such as amorphous silicas, certain polyacrylates that are crosslinked or modified with hydrophobic groups, for instance the products Luquasorb 1010 from BASF, Polytrap 6603 Adsorber from Amcol; buffers; dispersants; film-forming agents; preservatives; vitamins; fragrances; ceramides; conditioning agents other than the substantive polymers and the cationic surfactants mentioned above.
  • fillers such as clays
  • composition ii) according to the invention may also comprise clays which are not in fibrous form, for instance smectites, illites, kaolinites, glauconites, chlorites and/or vermiculites, and mixtures thereof.
  • the anhydrous composition ii) comprises one or more additional compound(s) chosen from:
  • composition in accordance with the invention may also comprise agents for controlling the release of oxygen, such as magnesium carbonate or magnesium oxide.
  • the additives and the oxygen-release control agents as defined previously may be present in an amount, for each of them, of between 0.01 % and 40% by weight and preferably between 0.1 % and 30% by weight relative to the total weight of the composition.
  • Another subject of the invention is a process for dyeing and/or bleaching keratin fibres, in particular human keratin fibres such as the hair, comprising the following steps: i) mixing the packaging article as defined previously with a composition that is capable of dissolving the envelope of the packaging article, ii) applying the resulting composition to the keratin fibres, iii) leaving the composition to stand on the fibres, iv) rinsing said fibres, v) optionally shampooing the fibres, rinsing them and drying them.
  • the composition capable of dissolving the envelope will be water or an aqueous composition when the envelope predominantly or solely contains a hydrophilic envelope
  • the composition capable of dissolving the envelope will be an anhydrous organic composition or an aqueous composition comprising at least one liquid fatty substance or at least one organic solvent other than liquid fatty substances such as lower monoalcohols, for example ethanol, or such as polyols, for example propylene glycol or glycerol, when the article predominantly or solely contains lipophilic sheets and envelope.
  • the aqueous composition may simply be water.
  • the aqueous composition may optionally comprise at least one polar solvent.
  • polar solvents that may be used in this composition, mention may be made of organic compounds that are liquid at ambient temperature (25°C) and at least partially water-miscible.
  • alkanols such as ethyl alcohol, isopropyl alcohol, aromatic alcohols such as benzyl alcohol and phenylethyl alcohol, or polyols or polyol ethers, for instance ethylene glycol monomethyl, monoethyl or monobutyl ether, propylene glycol or ethers thereof, for instance propylene glycol monomethyl ether, butylene glycol, dipropylene glycol, and also diethylene glycol alkyl ethers, for instance diethylene glycol monoethyl ether or monobutyl ether.
  • alkanols such as ethyl alcohol, isopropyl alcohol, aromatic alcohols such as benzyl alcohol and phenylethyl alcohol
  • polyols or polyol ethers for instance ethylene glycol monomethyl, monoethyl or monobutyl ether, propylene glycol or ethers thereof, for instance propylene glycol monomethyl ether, butylene glycol, diprop
  • aqueous composition ranges from 0.5% to 20% and preferably from 2% to 10% by weight relative to the weight of said aqueous composition.
  • the packaging article comprises at least one chemical oxidizing agent as defined previously.
  • the dyeing process as defined previously then uses in the first step an aqueous composition which optionally comprises at least one basifying agent as defined previously or optionally at least one ingredient chosen from direct dyes, in particular cationic direct dyes, preferentially those bearing a charge which are cationic, intracyclic, styryl, azo and hydrazono dyes, particularly azo and hydrazono dyes; ammonium salts, preferably chosen from ammonium halides such as ammonium chloride, ammonium sulfate, ammonium phosphate and ammonium nitrate; organic fatty substances, preferably chosen from mineral oils, in particular liquid petroleum jelly; thickening polymers; surfactants, preferably non-ionic or anionic surfactants, chosen in particular from (Ci 2 - C 2 o)alkyl sulfates and (Ci 2 -C 2 o)alkyl ether sul
  • These optional additives may be present in the packaging article.
  • the dyeing and/or bleaching process as defined previously is such that the dilution ratio of one or more packaging articles as defined previously/the composition capable of dissolving the article(s), expressed on a weight basis, is inclusively between 10/90 and 90/10 and preferably between 10/90 and 50/50. Preferentially, this ratio is 20/80.
  • the composition capable of dissolving the article is an aqueous hydrogen peroxide solution
  • it preferably has a pH of less than 7.
  • the acidic pH ensures the stability of the hydrogen peroxide in the composition. It may be obtained using acidifying agents, for instance hydrochloric acid, acetic acid, etidronic acid, phosphoric acid, lactic acid or boric acid, and it may be conventionally adjusted by adding either basifying agents, for instance aqueous ammonia, monoethanolamine, diethanolamine, triethanolamine, isopropanolamine, 1 ,3-diaminopropane, an alkali metal or ammonium (bi)carbonate, an organic carbonate such as guanidine carbonate, or an alkali metal hydroxide, all these compounds, needless to say, possibly being taken alone or as a mixture.
  • basifying agents for instance aqueous ammonia, monoethanolamine, diethanolamine, triethanolamine, isopropanolamine, 1 ,3-di
  • the pH of the resulting mixture is usually inclusively between 7 and 12.
  • the pH of said mixture is usually inclusively between 7.5 and 1 1.
  • this composition is applied to the wet or dry human keratin fibres.
  • the leave-on time is generally of the order of between 1 minute and 1 hour and preferably from 10 to 30 minutes.
  • the working temperature of the process is conventionally between ambient temperature (between 15 and 25°C) and 80°C and preferably between ambient temperature and 60°C.
  • the human keratin fibres are optionally rinsed with water, washed with shampoo, rinsed again with water, and then dried or left to dry.
  • compositions were prepared. The values are expressed as grams of active material for a composition total of 100 grams.
  • Example 1 Composition A (dyeing composition )
  • composition B compositions with oxidizing agent
  • composition B1 Composition B2
  • Composition B (oxidizing agent) the form of composition in conventional 20 an envelope i)) vol cream) (according to the (reference) invention)
  • VILMED M601/023 sold by
  • compositions comprising a fibrous clay, a colouring agent and an oxidizing agent in powder form) were prepared.
  • VILMED M601/023 sold by
  • Composition D (water)
  • the water used is, for example, tap water.
  • the comparative aqueous compositions outside the invention are prepared conventionally.
  • the packaging article is prepared in two stages: in a first stage, the powdered ingredients are selected, including the oxidation dyes. The mixture of the powdered ingredients is then homogenized. In a second stage, the envelope is prepared from PVA which is in the form of two nonwoven sheets joined together at the periphery, but leaving a part gaping allowing the introduction of ingredients. This double sheet is in the form of a disc (5 cm in diameter and 3 mm thick).
  • the mixture of said powdered ingredients is then introduced between the two PVA sheets of the disc, and the gaping part is then closed.
  • the packaging article of the invention weighing 3.3 g is mixed according to the indications in the table below, in a 1 :9 (weight/weight) ratio in a bowl or a heating bowl.
  • the mixture is applied to the hair, with a leave-on time of 30 minutes.
  • the hair is rinsed and is then optionally shampooed, shampooing preferably being performed, and the hair is then dried.
  • the values are expressed in gram(s) for a total mixture of 100 g or according to the procedure above.
  • the article of the invention is, for example, mixed (M2) with an aqueous composition (preferentially tap water) in a ratio of 27.80 g of powdered oxidizing agent (weight of the envelope + oxidizing composition) + 3.30 g (weight of the envelope + dye composition) + 68.90 g of water in a bowl or a heating bowl.
  • the mixture obtained is uniform, easy to work and luscious, with no tacky appearance and in particular with easy rinsing which is much better than the existing products (conventional oxidation dye).
  • the mixture is applied to hair with a leave-on time of between 5 minutes and 1 hour and preferably between 10 minutes and 40 minutes.
  • the hair is rinsed and is then optionally shampooed, shampooing preferably being performed, and the hair is then dried.
  • the mixture M2 results in dyeing properties comparable to conventional dyeing, in particular in terms of intensity and chromaticity; the dyeing result is very satisfactory. Furthermore, the ready-to-use mixture is easy and very pleasant to apply, and easy to localize. It should be noted that the process is very easy to perform since it is a matter of dissolving the packaging article. It was also observed that the colour obtained is very uniform from the root to the end of the hairs. Easy rinsing, much better than with the conventional oxidation dyes, is also observed.
  • Example 2 Compositions E (bleaching compositions)
  • Composition E1 comprising fibrous clay, in an envelope comprising PVA fibres;
  • Comparative Composition E3 out of the invention comprising non fibrous clay, in an envelope comprising PVA fibres.
  • composition E1 Composition E2 Composition E3
  • the packaging article is prepared in two stages, in a first stage, the powdered ingredients are selected, including the persulfate. The mixture of the powdered ingredients is then homogenized. In a second stage, the envelope is prepared from PVA which are in the form of two nonwoven laps (for compositions E1 and E3) or film laps (for composition E2) joined together at the periphery, but leaving a part gaping allowing the introduction of ingredients. This double lap is in the form of a disc (5 cm in diameter and 3 mm thick).
  • the mixture of the said powdered ingredients is then introduced between the two PVA laps of the disc, and the gaping part is then closed.
  • each of composition E1 , E2 and E3 is mixed an oxidizing composition (aqueous oxydant 40 volume (12% H202)) with the weight ratio of 1 parts of composition E1 , E2 and E3, for 1 ,5 part of the oxidizing composition in a bowl until total solubilization of the ingredients and homogeneity of the mixture.
  • oxidizing composition aqueous oxydant 40 volume (12% H202)
  • Each mixture E1 + Oxydant 40 vol, Mixture E2 + Oxydant 40 vol and Mixture E3 + oxydant 40 vol is then applied on HT2 natural dark brown hair with a bath ratio of 10 g of mixture for 1 g of lock, with a leave-on time of 50 minutes at 33 °C.
  • the hair is rinsed and is then shampooed, and the hair is then dried.
  • composition E1 according to the invention With composition E1 according to the invention, the mixture with the oxydant 40 volume is easy to realize, and homogeneous. The mixture obtained is easy to work and easy to apply on the lock of hair.
  • composition E1 40 volume is not homogeneous and comprises lumps. Because of the presence of the lumps, the mixture is less easy to apply on the hair, than composition E1.
  • composition E3 out of the invention With comparative composition E3 out of the invention, the mixture with the oxydant 40 volume is easy to realize and homogeneous. The mixture obtained is not thick enough and less easy to apply and to localize on the lock of hair than composition E1 .

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Abstract

L'invention concerne un article d'emballage comprenant une enveloppe et une composition de coloration et/ou de blanchiment et/ou d'oxydation anhydre comprenant une argile fibreuse, et un composé choisi parmi un agent colorant et/ou un agent oxydant ; l'utilisation et le procédé de coloration et/ou de blanchiment de fibres de kératine. La présente invention concerne un article d'emballage cosmétique comprenant : i) une enveloppe définissant au moins une cavité, l'enveloppe comprenant des fibres liposolubles ou solubles dans l'eau ; et ii) au moins une composition anhydre contenant au moins une argile fibreuse et au moins un composé choisi parmi des agents colorants et/ou des agents oxydants chimiques, étant entendu que la composition ii) est dans l'une des cavités de l'enveloppe i). L'invention concerne également l'utilisation de l'article d'emballage pour la coloration et/ou le blanchiment de fibres de kératine, et un procédé pour la coloration et/ou le blanchiment de fibres de kératine utilisant ledit article. L'utilisation de l'article d'emballage permet d'obtenir des compositions de colorant qui ont de bonnes propriétés de coloration et/ou d'éclaircissement, qui sont faciles à appliquer, et qui permettent d'obtenir une coloration et/ou un blanchiment puissant des cheveux.
PCT/EP2016/064661 2015-06-25 2016-06-24 Article d'emballage comprenant une enveloppe et une composition de coloration, de blanchiment ou d'oxydation anhydre comprenant une argile fibreuse, et un composé choisi parmi un agent colorant et/ou un agent oxydant ; utilisation et procédé de coloration et/ou de blanchiment de fibres de kératine WO2016207347A1 (fr)

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FR1555860 2015-06-25
FR1555860A FR3037795B1 (fr) 2015-06-25 2015-06-25 Article de conditionnement comportant une enveloppe et une composition colorante, decolorante ou oxydante anhydre comprenant une argile fibreuse, et un compose choisi parmi un agent colorant et/ou un agent oxydant ; utilisation et procede pour colorer et/ou decolorer les fibres keratiniques

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Cited By (5)

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GB2560214A (en) * 2016-10-12 2018-09-05 Henkel Ag & Co Kgaa Double-chamber pouch for dyeing human hair
GB2560215A (en) * 2016-10-12 2018-09-05 Henkel Ag & Co Kgaa Agent and method for lightening keratin-containing fibers
DE102020002886A1 (de) 2020-05-14 2021-11-18 Bernhard Max Biersack Neue Purpur-Pigmente basierend auf Palygorskit oder Sepiolith
WO2022149070A1 (fr) * 2021-01-05 2022-07-14 C-Care, Llc Article en dose unitaire pour ajouter une fonction cosmétique à un produit de base cosmétique
GB2606605B (en) * 2020-12-18 2023-08-09 Henkel Ag & Co Kgaa Portion unit with cosmetic agent for lightening keratinous fibers

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GB2560214A (en) * 2016-10-12 2018-09-05 Henkel Ag & Co Kgaa Double-chamber pouch for dyeing human hair
GB2560215A (en) * 2016-10-12 2018-09-05 Henkel Ag & Co Kgaa Agent and method for lightening keratin-containing fibers
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GB2560214B (en) * 2016-10-12 2021-05-12 Henkel Ag & Co Kgaa Double-chamber pouch for dyeing human hair
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DE102020002886A1 (de) 2020-05-14 2021-11-18 Bernhard Max Biersack Neue Purpur-Pigmente basierend auf Palygorskit oder Sepiolith
GB2606605B (en) * 2020-12-18 2023-08-09 Henkel Ag & Co Kgaa Portion unit with cosmetic agent for lightening keratinous fibers
WO2022149070A1 (fr) * 2021-01-05 2022-07-14 C-Care, Llc Article en dose unitaire pour ajouter une fonction cosmétique à un produit de base cosmétique

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