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WO1999020734A1 - Pains pour la blanchisserie presentant des proprietes physiques ameliorees - Google Patents

Pains pour la blanchisserie presentant des proprietes physiques ameliorees Download PDF

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Publication number
WO1999020734A1
WO1999020734A1 PCT/US1998/018006 US9818006W WO9920734A1 WO 1999020734 A1 WO1999020734 A1 WO 1999020734A1 US 9818006 W US9818006 W US 9818006W WO 9920734 A1 WO9920734 A1 WO 9920734A1
Authority
WO
WIPO (PCT)
Prior art keywords
bar composition
laundry detergent
mixtures
composition
group
Prior art date
Application number
PCT/US1998/018006
Other languages
English (en)
Inventor
Liben Hailu
Maria Renee Mongcopa Bautista
Carmina Amor Bonus Molina
Original Assignee
The Procter & Gamble Company
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
Priority claimed from PCT/US1997/019190 external-priority patent/WO1999020732A1/fr
Application filed by The Procter & Gamble Company filed Critical The Procter & Gamble Company
Priority to AU92122/98A priority Critical patent/AU9212298A/en
Publication of WO1999020734A1 publication Critical patent/WO1999020734A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/06—Phosphates, including polyphosphates
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/37—Mixtures of compounds all of which are anionic
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0047—Detergents in the form of bars or tablets
    • C11D17/0065—Solid detergents containing builders
    • C11D17/0069—Laundry bars
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/39—Organic or inorganic per-compounds
    • C11D3/3942—Inorganic per-compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/14—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aliphatic hydrocarbons or mono-alcohols
    • C11D1/146—Sulfuric acid esters
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/22—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aromatic compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/29—Sulfates of polyoxyalkylene ethers

Definitions

  • the present invention relates to an improved laundry detergent bar composition containing a peroxygen bleach having acceptable physical properties.
  • laundry detergent bars comprising synthetic organic surfactants and detergency phosphate builders are used in the laundering of clothes.
  • Technical developments in the field of laundry detergent bars have concerned formulating bars which are effective in cleaning clothes; which have acceptable sudsing characteristics in warm and cool water and in hard and soft water; which have acceptable in-use wear rates, hardness, durability, and feel; which have low smear; and which have a pleasing odor and appearance.
  • Methods for making laundry detergent bars are also well known in the art.
  • Prior art disclosing laundry bars and methods for making laundry bars include: U.S. Pat. 3,178,370, Okenfuss, issued April 13, 1965; and Philippine Pat. 13,778, Anderson, issued September 23, 1980.
  • Laundry bar compositions are commonly used in countries having high humidity, such as in the Philippines, India, and Latin America. Consumers often launder clothes outside and therefore often store the laundry bars outside. Although not intended to be limited by theory, such bars which are stored at high humidity conditions tend to absorb moisture in such high humidity conditions. Especially for peroxygen bleach containing laundry bar compositions, the absorption of moisture from high humidity conditions creates bars having unacceptable physical properties due to "puffing" of the bars, making the bar surface wet, soft and covered with small holes.
  • low-moisture bleach containing bars comprising high levels of phosphate and polyphosphate builder materials have acceptable bar physical properties As a result, the puffing" problem is substantially eliminated Also, the bars have significantly less moisture absorption, especially at high humidity conditions, which leads to a good rate of drying of the surface of the bar
  • bar compositions of the present invention have improved hardness of the bar, thereby retaining the structural integrity during use and transportation
  • the bar of the present invention is substantially not gritty, meaning that the bar should not be rough to the touch and that the bar should have substantially little hard particles on the surface
  • such compositions have good bar solubility, and do not easily melt after becoming wet during the washing process Even further the bleach in the bars of the present invention are stable
  • the present invention is directed to a laundry detergent bar composition
  • a laundry detergent bar composition comprising from about 0 5% to about 60% anionic surfactant, from about 0 1 % to about 20% peroxygen bleach, at least about 14% phosphate builder selected from the group consisting of phosphates, pyrophosphates, orthophosphates, t ⁇ polyphosphates, higher polyphosphates, and mixtures thereof, and wherein the total moisture content in the final bar composition is from about 0 1 % to about 6%, and wherein the ratio of the phosphate builder to the total moisture content is from about 4 1 to about 12 1
  • composition of the present invention comprises from about 0.5% to about 60% anionic surfactant by weight of the total bar composition
  • the bar composition comprises from about 10% to about 50%, more preferably, from about 15% to about 30% anionic surfactant, by weight of the total bar composition.
  • Anionic surfactants are preferably selected from the group consisting of linear alkyl benzene sulfonate, alkyl sulfate, alkyl ethoxylate sulfate and mixtures thereof.
  • Anionic synthetic detergent surfactants which are suitable for use herein include the water-soluble salts, preferably the alkali metal, ammonium and alkylolammonium salts of organic sulfuric reaction products having in their molecular structure an alkyl group containing from about 10 to about 20 carbon atoms and a sulfonic acid or sulfuric acid ester group.
  • alkyl is the alkyl portion of acyl groups.
  • this group of synthetic surfactants are the sodium and potassium alkyl sulfates, especially those obtained by suifating the higher alcohols (C8-18 carbon atoms) such as those produced by reducing the glycerides of tallow or coconut oil; and the sodium and potassium alkylbenzene sulfonates in which the alkyl group contains from about 9 to about 15 carbon atoms, in straight chain or branched chain configuration, e.g., those of the type described in U.S.
  • Patents 2.220,099 and 2,477,383 Especially valuable are linear straight chain alkylbenzene sulfonates in which the average number of carbon atoms in the alkyl group is from about 11 to 13, abbreviated as C-
  • the alkali metal salts, particularly the sodium salts of these surfactants are preferred.
  • Alkylbenzene sulfonates and processes for making them are disclosed in U.S. Patent Nos. 2,220,099 and 2,477,383.
  • anionic surfactants are preferred.
  • preferred anionic surfactants are C-jo_-
  • Q-18 a 'kyl sulfates can be in many physical forms, such as paste or flakes, the flake form is preferred
  • One preferred composition comprises a mixture of LAS Alkyl sulfate in a ratio of from about 10 90 to about 100 1 , preferably from about 20 80 to about 40 60 B
  • the composition of the present invention comprises from about 0 1 % to about 20% peroxygen bleach, by weight of the total bar composition
  • the bar composition comprises from about 1 % to about 10%, more preferably, from about 2% to about 5% peroxygen bleach, by weight of the total bar composition
  • the peroxygen bleach of the present invention are those peroxygen bleaching compounds which are capable of yielding hydrogen peroxide in an aqueous solution
  • These compounds are well known in the art and include hydrogen peroxide and the alkali metal peroxides, organic peroxide bleaching compounds such as urea peroxide, and inorganic persalt bleaching compounds, such as the alkali metal perborates, percarbonates, perphosphates, and the like Mixtures of two or more such bleaching compounds can also be used, if desired
  • Preferred peroxygen bleaching compounds to be used in the present invention include peroxygen bleach selected from the group consisting of perborates, percarbonates, peroxyhydrates, peroxides, persulfates, and mixtures thereof
  • peroxygen bleach selected from the group consisting of perborates, percarbonates, peroxyhydrates, peroxides, persulfates, and mixtures thereof
  • Specific preferred examples include sodium perborate, commercially available in the form of mono- and tetra-hydrates, sodium carbonate peroxyhydrate, sodium pyrophosphate peroxyhydrate, urea peroxyhydrate, and sodium peroxide
  • Particular preferred are sodium perborate tetrahydrate, and especially, sodium perborate monohydrate
  • Sodium perborate monohydrate is especially preferred because it is very stable during storage and yet still dissolves very quickly in the bleaching solution
  • Persulfate bleach (e g , OXONE, manufactured commercially by DuPont) can also be used
  • peroxygen bleach agents can also be used such as a percarbonate bleach
  • a percarbonate bleach comprises dry particles having an average particle size in the range from about 500 micrometers to about 1 ,000 micrometers, not more than about 10% by weight of said particles being smaller than about 200 micrometers and not more than about 10% by weight of said particles being larger than about 1 ,250 micrometers
  • the percarbonate can be coated with silicate, borate or water-soluble surfactants
  • Percarbonate is available from various commercial sources such as FMC, Solvay and Tokai Denka.
  • the composition of the present invention comprises at least about 14% phosphate builder, by weight of the total bar composition.
  • the bar composition comprises from about 14% to about 35%, more preferably, from about 18% to about 25% phosphate builder, by weight of the total bar composition.
  • the phosphate builder is selected from the group consisting of phosphates, pyrophosphates, orthophosphates, tripolyphosphates, higher polyphosphates, and mixtures thereof.
  • Polyphosphates include both cyclic or linear polyphosphates.
  • the phosphate builders are preferably water-soluble alkali-metal salts of phosphate, including pyrophosphates, orthophosphates, tripolyphosphates, higher polyphosphates, and mixtures thereof.
  • Preferred phosphate builders are a water-soluble alkali-metal salt of tripolyphosphate, and a mixture of tripolyphosphate and pyrophosphate.
  • Specific preferred examples of phosphate builders include sodium tripolyphosphates (STPP) and tetra sodium pyrophosphates (TSPP), and mixtures thereof.
  • the composition of the present invention has a total moisture content from about 0.1 % to about 6%, by weight of the final bar composition
  • the bar composition has a total moisture content from about 1 % to about 5%, more preferably, from about 2.5% to about 4.5%, by weight of the total bar composition.
  • the total moisture level of the final bar composition can be determined by any methods known in the art by one skilled in the area of laundry bar compositions. One common method is the Bidwell Sterling Distillation method. Another known method is the Karl Fischer Moisture Titration Method See AOCS official method Dd2a-59 issue 93 and AOCS official method Dd2b-59 issue 89.
  • the composition of the present invention has a ratio of the phosphate builder to the total moisture content from about 4:1 to about 12:1.
  • the ratio of the phosphate builder to the total moisture content is from about 6.4:1 to about 10:1.
  • the detergent bars of the present invention can contain optional surfactants in addition to the anionic synthetic detergent surfactants described above.
  • optional surfactants if present, can be included at levels up to a total of about 10%, preferably about 0.5-3%, by weight of the total bar composition.
  • optional surfactants e.g. nonionic, zwitte ⁇ onic and amphote ⁇ c surfactants
  • optional alkaline builders such as sodium carbonate trisodium phosphate, etc. and other ingredients useful herein appears in U.S Pat. No. 3,664,961 , issued to Nor ⁇ s on May 23, 1972, and EP 550,652, published on April 16, 1992.
  • Cationic surfactant is another optional surfactant.
  • Amine Oxides are excellent cosurfactants that may be used in conjunction with the present invention.
  • Preferred types are C-12-C18 amine oxides, preferably C14. If included, the level of amine oxide in the final bar composition is from about 1 % to about 10%, preferably, from about 2% to about 5%
  • alkyl ethoxylate sulfates the sodium alkyl glyceryl ether sulfonates, especially those ethers of higher alcohols derived from tallow and coconut oil; sodium coconut oil fatty acid monoglyceride sulfonates and sulfates.
  • alkyl glyceryl ether sulfonates Preparation of alkyl glyceryl ether sulfonates are described in detail in U.S. Pat. 3,024,273, Whyte et al., issued March 6, 1962.
  • optional synthetic anionic surfactants include the water- soluble salts of esters of alpha-sulfonated fatty acids containing from about 6 to 20 carbon atoms in the fatty acid group and from about 1 to 10 carbon atoms in the ester group; water-soluble salts of 2-acyioxyalkane-1 -sulfonic acids containing from about 2 to 9 carbon atoms in the acyl group and from about 9 to about 23 carbon atoms in the alkane moiety; water-soluble salts of olefin and paraffin sulfonates containing from about 12 to 20 carbon atoms; and beta- alkyloxy alkane sulfonates containing from about 1 to 3 carbon atoms in the alkyl group and from about 8 to 20 carbon atoms in the alkane moiety
  • hydrotrope or mixture of hydrotropes, may be present in the laundry detergent bar.
  • Preferred hydrotropes include the alkali metal, preferably sodium, salts of toluene sulfonate, xylene sulfonate, cumene sulfonate, sulfosuccinate, and mixtures thereof.
  • the hydrotrope is added to the linear alkyl benzene sulfonic acid prior to its neutralization.
  • the hydrotrope, if present, will preferably be present at from about 0.5% to about 5% of the laundry detergent bar.
  • the builder can optionally contain in addition to the phosphate builder, a non-phosphate detergent builder
  • non-phosphate, inorganic detergency builders include water-soluble inorganic carbonate and bicarbonate salts
  • alkali metal (e g , sodium and potassium) carbonates and bicarbonates are particularly useful herein
  • Other specifically preferred examples of builders include polycarboxylates, zeolite, and layered silicates
  • Sodium carbonate or sodium hydroxide another optional ingredient, is particularly preferred as a neutralizing inorganic salt for an acid precursor of an anionic surfactant used in such compositions, such as the alkyl ether sulfuric acid and alkylbenzene sulfonic acid Co-polymers of acrylic acid and maleic acid are preferred in the subject compositions as auxiliary builders
  • Binding agents is particularly preferred to give the bar composition good binding and a good rate of hardening during the manufacture of the bar compositions
  • the addition of magnesium sulfate to the bar composition gives such benefits
  • the bar composition comprises from about 1 5% to about 10%, more preferably, from about 2% to about 5% magnesium sulfate, by weight of the final bar composition
  • magnesium sulfate it must be added in the manufacturing process after the addition of both the calcium salt and siliceous material
  • Soil suspending agents can be used Soil suspending agents can also include water-soluble salts of carboxymethylcellulose and carboxyhydroxymethylcellulose
  • a preferred soil suspending agent is an acrylic/maleic copolymer, commercially available as Sokolan® from BASF Corp
  • Other soil suspending agents include polyethylene glycols having a molecular weignt of about 400 to 10,000, and ethoxylated mono- and polyamines and quaternary salts thereof If included, it can be at levels up to about 5%, preferably about 0 1
  • a preferred component of the present invention is a chelating agent
  • chelating agents are able to sequester and chelate alkali cations (such as sodium, lithium and potassium), alkali metal earth cations (such as magnesium and calcium), and most importantly, heavy metal cations such as iron, manganese, zinc and aluminum Preferred cations include sodium, magnesium, zinc, and mixtures thereof
  • alkali cations such as sodium, lithium and potassium
  • alkali metal earth cations such as magnesium and calcium
  • heavy metal cations such as iron, manganese, zinc and aluminum
  • Preferred cations include sodium, magnesium, zinc, and mixtures thereof
  • the chelating agent is preferably selected from a group consisting of amino carboxylates, amino phosphonates, polyfunctionally-substituted aromatic chelating agents and mixtures thereof.
  • One preferred chelating agent is a phosphonate chelating agent, particularly one selected from the group consisting of diethylenetriamine penta(methylene phosphonic acid), ethylene diamine tetra(methylene phosphonic acid), and mixtures and salts and complexes thereof, and an acetate chelating agent, particularly one selected from the group consisting of diethylenetriamine penta(acetic acid), ethylene diamine tetra(acetic acid), and mixtures and salts and complexes thereof.
  • Particularly preferred are sodium, zinc, magnesium, and aluminum salts and complexes of diethylenetriamine penta(methylene phosphonate) diethylenetriamine penta (acetate), and mixtures thereof.
  • 1 -hydroethoxylidene-1 , 1-diphosponic acid tetrasodium salt including mixtures, salts and complexes, especially magnesium salts.
  • Chelating agents have several physical forms, for example liquid chelating agents and dry chelating agents.
  • the dry form of the phosphonate chelating agent is particularly preferred, although the liquid form is also an option.
  • a combination of both liquid and dry form is also preferred.
  • a preferred ratio of liquid to dry chelating agent is from about 70:30 to 0:100, more preferably, 48:52 to 65:35.
  • such salts or complexes have a molar ratio of metal ion to chelating agent molecule of at least 1 :1 , preferably at least 2:1.
  • the detergent chelating agent can be included in the laundry bar at a level of from about 0.1 % to about 10%, more preferably from about 0.5% to about 6%, most preferably from about 3% to about 5%.
  • fatty alcohol having an alkyl chain of 8 to 22 carbon atoms, more preferably from 12 to 18 carbon atoms.
  • a preferred fatty alcohol has an alkyl chain predominantly containing from 16 to 18 carbon atoms, so-called "high-cut fatty alcohol,” which can exhibit less base odor of fatty alcohol relative to broad cut fatty alcohols.
  • high-cut fatty alcohol typically fatty alcohol, if any, is present in the laundry bar at up to a level of 10%, more preferably from about 0.75% to about 6%, most preferably from about 2% to about 5%.
  • the fatty alcohol is generally added to a laundry bar as free fatty alcohol. However, low levels of fatty alcohol can be introduced into the bars as impurities or as unreacted starting material.
  • laundry bars based on coconut fatty alkyl sulfate can contain, as unreacted starting material, from 0.1 % to 3.5%, more typically from 2% to 3%, by weight of free coconut fatty alcohol on a coconut fatty alkyl sulfate basis.
  • Another optional component in the laundry bar is a dye transfer inhibiting
  • a preferred DTI ingredient can include polymeric DTI materials capable of binding fugitive dyes to prevent them from depositing on the fabrics, and decolorization DTI materials capable of decolorizing the fugitives dye by oxidation.
  • An example of a decolorization DTI is hydrogen peroxide or a source of hydrogen peroxide, such as percarbonate or perborate.
  • Non-limiting examples of polymeric DTI materials include polyvinylpyrridine N-oxide, polyvinylpyrrolidone (PVP), PVP- polyvinylimidazole copolymer, and mixtures thereof.
  • Copolymers of N- vinyipyrrolidone and N-vinylimidazole polymers are also preferred for use herein.
  • the amount of DTI included in the subject compositions, if any, is about 0.05-5%, preferably about 0.2-2%.
  • a fabric softener component is a fabric softener component.
  • Such materials can be used, if any, at levels of about 0.1 % to 5%, more preferably from 0.3% to 3%, and can include: amines of the formula R4R5R6N, wherein R4 is C5 to C22 hydrocarbyl, R5 and RQ are independently C1 to C10 hydrocarbyl.
  • R4 is C5 to C22 hydrocarbyl
  • R5 and RQ are independently C1 to C10 hydrocarbyl.
  • One preferred amine is ditallowmethyl amine; complexes of such amines with fatty acid of the formula R7COOH, wherein R7 is Cg to C22 hydrocarbyl, as disclosed in EP No.
  • R12 and Ri3 are alkyl having 1 to 4 carbons, preferably methyl, and X is an anion, preferably Cl " or Br, such as C12-13 alkyl trimethyl ammonium chloride.
  • Sodium sulfate is a well-known filler that is compatible with the compositions of this invention. It can be a by-product of the surfactant sulfation and sulfonation processes, or it can be added separately Calcium carbonate (also known as Calcarb) is also a well known and often used filler component of laundry bars. Talc is another optional filler material. Filler materials are typically used, if included, at levels up to 40%, preferably from about 5% to about 25%.
  • the fabric softening clay is preferably a smectite-type clay that is compatible with the compositions of this invention
  • the smectite-type clays can be described as expandable, three-layer clays, i e , alumino-si cates and magnesium silicates, having an ion exchange capacity of at least about 50 meq/100 g. of clay.
  • the clay particles are of a size that they can not be perceived tactilely, so as not to have a gritty feel on the treated fabric of the clothes.
  • the fabric softening clay can be added to the bar to provide about 1 % to about 50% by weight of the bar, more preferably from about 2% to about 20%, and most preferably about 3% to 14% While any of the smectite-type clays described herein are useful in the present invention, certain clays are preferred
  • Gelwhite GP is an extremely white form of smectite-type clay and is therefore preferred when formulating white granular detergent compositions
  • Volclay BC which is a smectite-type clay mineral containing at least 3% iron (expressed as Fe2 ⁇ 3) in the crystal lattice, and which has a very high ion exchange capacity, is one of the most efficient and effective clays for use in the instant compositions from the standpoint of product performance
  • certain smectite-type clays are sufficiently contaminated by other silicate minerals that their ion exchange capacities fall below the requisite range, such clays are of no use in the instant compositions.
  • a Clay flocculating agent is another optional ingredient Typically such materials have a high molecular weight, greater than about 100,000 Examples of such materials can include long chain polymers and copolymers derived from monomers such as ethylene oxide, acrylamide, acrylic acid, dimethylamino ethyl methacrylate, vinyl alcohol, vinyl pyrrolidone, and ethylene imine Gums, like guar gums, are suitable as well
  • the preferred clay flocculating agent is a poly(ethylene oxide) polymer
  • the amount of clay flocculating agent, if any, is about 0.2-2%, preferably about 0 5-1 %
  • Optical brighteners are also optional ingredients in laundry bars of the present invention.
  • Preferred optical brighteners are diamino stilbene, distyrilbiphenyl-type optical brighteners.
  • Preferred as examples of such brighteners are 4,4'-bis ⁇ [4-anilino-6-bis(2-hydoxyethyl) amino-1 ,3,5-trizin-2- yl]amino ⁇ stilbene-2,2'-disulfonic acid disodium salt, 4-4'-bis(2-sulfostyryl) biphenyl and 4,4'-bis[(4-anilino-6-morpholino-1 ,3,5-triazin-2-yl) aminojstilbene- 2,2'-disulfonic acid disodium salt.
  • Such optical brighteners, or mixtures thereof can be used at levels in the bar of from about 0.05% - 1.0%.
  • Dyes, pigments, germicides, and perfumes can also be added to the bar composition. If included, they are typically at levels up to about 0.5%.
  • photobleach material particularly phthalocyanine photobleaches which are described in U.S. Patent 4,033,718 issued July 5, 1977, incorporated herein by reference.
  • Preferred photobleaches are metal phthalocyanine compounds, the metal preferably having a valance of +2 or +3; zinc and aluminum are preferred metals.
  • Such photobleaches are available, for example, under the tradename TINOLUS or as zinc phthalocyanine sulfonate.
  • the photobleach components, if included, are typically in the subject compositions at levels up to about 0.02%, preferably from about 0.001 % to about 0.015%, more preferably from about 0.002% to about 0.01 %.
  • Titanium dioxide is another optional component. It can be a preferred ingredient for aesthetics of the bar composition, e.g. whiteness.
  • Another useful optional component of the subject compositions are detergent enzymes. Particularly preferred are lipase, protease, cellulase, amylase, and mixtures thereof. Enzymes, if included, are typically at levels up to about 5%, preferably about 0.05-3%. F. Bar Physical Properties
  • the bars when bars are stored in a high temperature and/or a high humidity environment, such as for example 30°C at 80% relative humidity, the bars absorb moisture from the environment. Because of the moisture absorption, the surfactant at the surface of the bar begins to dissolve. As oxygen gas (from the peroxygen bleach) releases towards the surface of the bar, the gas encounters a layer of dissolved surfactant, thereby forming micro bubbles or "puffing" on the surface.
  • the bars of the present invention substantially have no "puffing" of the bars. This means that the bar's surface is smooth and does not have small holes in the surface that look like indentations.
  • the bars of the present invention are also sufficiently hard and dry even when stored at high temperature and humidity conditions.
  • a bar physical property of interest is the bar solubility in water.
  • One method of determining the bar solubility is to submerge a bar having the following dimensions: 75mm x 55mm, in 250 ml of water in a beaker for 2 hours, drying the bar at 60 degrees. C for 2 hours and then weighing the bar.
  • the difference in weight should be about 15-30 grams for a 120-125 gram bar (12-25% of the original weight of the bar), more preferably 5-25 grams (4-21 % of the original weight of the bar).
  • the detergent laundry bars of the present invention can be processed in conventional soap or detergent bar making equipment with some or all of the following key equipment: blender/mixer, mill or refining plodder, two-stage vacuum plodder, logo printer/cutter, cooling tunnel and wrapper.
  • blender/mixer mill or refining plodder
  • two-stage vacuum plodder two-stage vacuum plodder
  • logo printer/cutter logo printer/cutter
  • cooling tunnel and wrapper the raw materials are mixed in the blender.
  • Alkyl benzene sulfonic acid is reacted with alkaline inorganic salts to complete neutralization, the amount of alkaline inorganic salt being at least sufficient to completely neutralize the acid.
  • At least 5% of the phosphate builder must be present during the neutralization reaction. Preferably at least 10% can be present.
  • other optional surfactants followed by any additional optional components such as chelating agents are added.
  • the mixing can take from one minute to one hour, with the usual mixing time being from about two to twenty minutes.
  • the blender mix is charged to a surge tank.
  • the product is conveyed from the surge tank to the mill or refining plodder via a multi-worm conveyor. After milling or preliminary plodding, the product is then conveyed to a two-stage vacuum plodder, operating at high vacuum, e.g. 600 to 740 mm of mercury vacuum, so that entrapped air/gas is removed.
  • the product is extruded and cut to the desired bar length, and printed with the product brand name.
  • the printed bar is preferably cooled, for example in a cooling tunnel, before it is wrapped, cased, and sent to storage.
  • a preferred laundry bar composition is made by the following method: The raw materials are first mixed in a blender. STPP, sodium carbonate and pre-neutralized CFAS (if a mixture of CFAS/LAS is used as surfactant system) are mixed for about 1-2 minutes This is followed by the addition of linear alkyl benzene sulfonic acid and sulfuric acid (if present in the formulation).
  • the acids are then completely neutralized by the sodium carbonate in the seat of the blender. (The amount of sodium carbonate should be at least an amount sufficient to neutralize the acids.) Then, a chelating agent, if present is added, followed by other optional surfactants (if present), and any other additional optional components.
  • the total mixing time can take up to about one hour, with the usual mixing time being from about five to twenty minutes.
  • peroxygen bleach and optionally, enzymes can be added to the mixture and then mixed, preferably, for an additional 2 minutes. It is preferred that when peroxygen bleach is added as one of the last ingredients, the temperature of the blender mixture is about 45 to 65°C.
  • the blender mix is charged to a surge tank. The product is conveyed from the surge tank to the mill or refining plodder via a multi-worm conveyor.
  • the product is then conveyed to a two-stage vacuum plodder, operating at high vacuum, e.g. 600 to 740 mm of mercury vacuum, so that entrapped air is removed.
  • high vacuum e.g. 600 to 740 mm of mercury vacuum
  • the product is extruded and cut to the desired bar length, and printed with the product brand name.
  • the printed bar is cooled, for example in a cooling tunnel, before it is wrapped, cased, and sent to storage as described above.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Detergent Compositions (AREA)

Abstract

La présente invention concerne une composition de pain détergent, pour la blanchisserie, comprenant environ 0,5 à 60 % d'un tensioactif anionique, environ 0,1 à 20 % d'un agent de blanchiment à base de peroxygène, au moins 14 % environ d'un adjuvant de détergence à base de phosphate, choisi dans le groupe constitué par des phosphates, des pyrophosphates, des orthophosphates, des tripolyphosphates, des polyphosphates supérieurs, ainsi que des mélanges de ces substances. Cette composition est caractérisée en ce que la teneur totale en humidité de la composition finale du pain est comprise entre 0,1 et 6 % environ, et en ce que le rapport entre l'adjuvant de détergence à base de phosphate et la teneur totale en humidité est compris entre 4/1 et 12/1 environ.
PCT/US1998/018006 1997-10-23 1998-08-31 Pains pour la blanchisserie presentant des proprietes physiques ameliorees WO1999020734A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU92122/98A AU9212298A (en) 1997-10-23 1998-08-31 Laundry bars having improved physical properties

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
USPCT/US97/19190 1997-10-23
PCT/US1997/019190 WO1999020732A1 (fr) 1997-10-23 1997-10-23 Barres detergentes a proprietes physiques ameliorees
USPCT/US98/15182 1998-07-22
PCT/US1998/015182 WO1999020733A1 (fr) 1997-10-23 1998-07-22 Detergent a lessive en pain avec proprietes physiques ameliorees

Publications (1)

Publication Number Publication Date
WO1999020734A1 true WO1999020734A1 (fr) 1999-04-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/018006 WO1999020734A1 (fr) 1997-10-23 1998-08-31 Pains pour la blanchisserie presentant des proprietes physiques ameliorees

Country Status (2)

Country Link
AU (1) AU9212298A (fr)
WO (1) WO1999020734A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002053691A1 (fr) * 2000-12-29 2002-07-11 Unilever Plc Compositions de detergents
WO2003029393A2 (fr) * 2001-09-28 2003-04-10 Ecolab Inc. Compositions de nettoyage de metal alcalin
WO2003078691A2 (fr) * 2002-03-15 2003-09-25 Ecolab Inc. Composition de nettoyage de metaux sensibles aux substances alcalines, procede servant a nettoyer ces surfaces et installation de lavage
US6730649B2 (en) 2000-12-29 2004-05-04 Unilever Home & Personal Care Usa, A Division Of Conopco, Inc. Detergent compositions
GB2406574A (en) * 2003-10-02 2005-04-06 Reckitt Benckiser Nv Extruded fabric cleaning bar

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3562165A (en) * 1966-03-24 1971-02-09 Renato Altieri Process for preparing a dry compacted detergent composition
GB2172300A (en) * 1985-03-14 1986-09-17 Unilever Plc Laundry bars
EP0312278A2 (fr) * 1987-10-12 1989-04-19 Unilever Plc Composition détergente
GB2221220A (en) * 1988-07-26 1990-01-31 Unilever Plc Laundry bars
GB2260989A (en) * 1991-10-30 1993-05-05 Unilever Plc Shaped detergent compositions
WO1995027038A1 (fr) * 1994-03-30 1995-10-12 The Procter & Gamble Company Pains de detergent a lessive a blanchiment ameliore et inhibition du transfert des colorants
WO1997008283A1 (fr) * 1995-08-25 1997-03-06 The Procter & Gamble Company Composition de detergent avec systeme de blanchiment stabilise par enzymes
WO1997044434A1 (fr) * 1996-05-17 1997-11-27 The Procter & Gamble Company Barre detergente de lessive possedant une faible teneur en humidite et une stabilite de blanchiment amelioree

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3562165A (en) * 1966-03-24 1971-02-09 Renato Altieri Process for preparing a dry compacted detergent composition
GB2172300A (en) * 1985-03-14 1986-09-17 Unilever Plc Laundry bars
EP0312278A2 (fr) * 1987-10-12 1989-04-19 Unilever Plc Composition détergente
GB2221220A (en) * 1988-07-26 1990-01-31 Unilever Plc Laundry bars
GB2260989A (en) * 1991-10-30 1993-05-05 Unilever Plc Shaped detergent compositions
WO1995027038A1 (fr) * 1994-03-30 1995-10-12 The Procter & Gamble Company Pains de detergent a lessive a blanchiment ameliore et inhibition du transfert des colorants
WO1997008283A1 (fr) * 1995-08-25 1997-03-06 The Procter & Gamble Company Composition de detergent avec systeme de blanchiment stabilise par enzymes
WO1997044434A1 (fr) * 1996-05-17 1997-11-27 The Procter & Gamble Company Barre detergente de lessive possedant une faible teneur en humidite et une stabilite de blanchiment amelioree

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002053691A1 (fr) * 2000-12-29 2002-07-11 Unilever Plc Compositions de detergents
US6716807B2 (en) 2000-12-29 2004-04-06 Unilever Home & Personal Care Usa Division Of Conopco, Inc. Detergent compositions
US6730649B2 (en) 2000-12-29 2004-05-04 Unilever Home & Personal Care Usa, A Division Of Conopco, Inc. Detergent compositions
WO2003029393A2 (fr) * 2001-09-28 2003-04-10 Ecolab Inc. Compositions de nettoyage de metal alcalin
WO2003029393A3 (fr) * 2001-09-28 2003-09-18 Ecolab Inc Compositions de nettoyage de metal alcalin
US6812194B2 (en) 2001-09-28 2004-11-02 Ecolab, Inc. Alkaline metal cleaner comprising sulfonated-hydrophobically modified polyacrylate
WO2003078691A2 (fr) * 2002-03-15 2003-09-25 Ecolab Inc. Composition de nettoyage de metaux sensibles aux substances alcalines, procede servant a nettoyer ces surfaces et installation de lavage
WO2003078691A3 (fr) * 2002-03-15 2004-11-04 Ecolab Inc Composition de nettoyage de metaux sensibles aux substances alcalines, procede servant a nettoyer ces surfaces et installation de lavage
GB2406574A (en) * 2003-10-02 2005-04-06 Reckitt Benckiser Nv Extruded fabric cleaning bar

Also Published As

Publication number Publication date
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