FR3140539A1 - SHEET TYPE COSMETIC PRODUCT - Google Patents

Abstract

SHEET-TYPE COSMETIC PRODUCT The present invention relates to a sheet-type cosmetic product, comprising: (A) at least one water-soluble/dispersible substrate; and (B) at least one coating layer disposed on the water-soluble/dispersible substrate, comprising (b1) at least one clay and (b2) at least one water-soluble binder. The product has improved usability, being easy to remove from the skin after use. Figure for the abstract: none

Description

SHEET TYPE COSMETIC PRODUCT

The present invention relates to a sheet-type cosmetic product, preferably a sheet-type cosmetic product comprising clay.

CONTEXT OF ART

Excess secretion of fatty/waxy matter by the sebaceous glands is responsible for the oily appearance of the skin. Sebaceous glands are primarily found on the face and scalp, although they are distributed across all areas of the skin except the palms of the hands and soles of the feet. Sebum contains triglycerides, waxes, squalene and metabolites of fat-producing cells. Although sebum keeps hair and skin supple, excess sebum can contribute to the concentration of horny cells at the opening of the sebaceous follicles on the skin's surface, causing constriction in the opening. follicular, leading to a plug or comedones. This can lead to blackheads, whiteheads, severe irritation, redness, tissue damage and acne.

The use of clay minerals as medicinal and cosmetic tools has long been popular. Clays are used to absorb excess oil, dirt and toxins from the skin while exfoliating the skin and improving skin circulation. For example: U.S. patent 2006/0292108 describes a skin care composition composed of 10% kaolin.

Additionally, clay in powder form or ready-to-use paste form is sold as a clay mask or facial beauty mask. The term "face mask" here refers to a product in the form of a cream or paste which is applied like a mask by forming a thin layer on the skin for a specific period of time or until the product dries, then is removed by rubbing or is removed by rinsing with water. However, applying such a product is a messy process and consumers must scrub the skin to remove such a product. When drying such clay products, when a consumer moves their facial muscles, the dry mud tends to fall from the face and soil the bathroom, clothes, etc., requiring the user to clean or wash. Additionally, generally, after applying such clay masks, consumers should also use a cleanser to clean their face.

Additionally, WO2015/075143 reports a body applicator composition comprising at least one clay and at least one water-soluble polymer, which can be provided in the form of a facial mask. The product in this publication is intended to be lifted off the skin after application to the skin.

However, a clay-based sheet product that has improved usability, particularly one that can be easily removed from the skin after use, has yet to be developed.

DISCLOSURE OF THE INVENTION

An objective of the present invention is to provide a clay-based sheet product which has improved ease of use, in particular which can be easily removed from the skin after use.

The above objective of the present invention can be achieved by a sheet-type cosmetic product, comprising

(A) at least one water-soluble/dispersible substrate; And

(B) at least one coating layer disposed on the water-soluble/dispersible substrate, comprising (b1) at least one clay and (b2) at least one water-soluble binder.

The product may be intended for the care and/or revitalization of a keratinous substance, such as the skin.

The product may be a skin mask, preferably a facial mask.

The water soluble/dispersible substrate (A) may comprise a water soluble/dispersible polymer.

The water soluble/dispersible polymer may be a water soluble polymer selected from the group consisting of celluloses and derivatives thereof, polyvinyl alcohol, and a mixture thereof.

The content of the coating layer(s) may be in the range of 1 g/m ² to 200 g/m ² , preferably 5 g/m ² to 100 g/m ² and, more preferably from 10 g/m ² to 70 g/m ² , and even more preferably from 15 g/m ² to 50 g/m ² of the product.

The coating layer(s) may comprise the clay(s) (b1) in an amount ranging from 50% to 99.5% by weight, preferably 65%. at 99% by weight, more preferably 80% to 98% by weight, and even more preferably 90% to 97% by weight, relative to the total weight of the coating layer(s). .

The water-soluble binder (b2) can be chosen from the group consisting of starch, pullulan, cellulose, derivatives thereof, and a mixture thereof, alcohol polyvinyl, polyvinylpyrrolidone, and a mixture thereof.

The water-soluble binder (b2) may be different from the water-soluble/dispersible polymer included in the water-soluble/dispersible substrate (A).

The coating layer(s) may comprise the water-soluble binder(s) (b2) in an amount ranging from 0.1% to 15 % by weight, preferably 0.5% to 10% by weight, more preferably 1 to 7% by weight, and even more preferably 2 to 5% by weight, relative to the total weight of the coating layer(s).

The coating layer may include at least one polyol.

The content of polyol(s) in the coating layer(s) may be in the range of 0.001 to 20 wt.%, preferably 0.01 to 15 wt.%, more preferably 0 .1 to 10% by weight, and even more preferably 1 to 5% by weight, relative to the total weight of the coating layer(s).

The present invention also relates to a method of manufacturing the sheet-type cosmetic product according to the present invention, comprising the steps of:

(i) preparation of at least one water-soluble/dispersible substrate (A),

(ii) preparation of a coating solution by mixing (b1) at least one clay and (b2) at least one water-soluble binder in at least one solvent,

(iii) applying the coating solution to the water soluble/dispersible substrate (A), and

(iv) drying the coating solution applied to form the coating layer (B) to obtain the sheet-like cosmetic product.

The solvent in step (ii) can be chosen from lower, linear or branched monoalcohols, preferably lower, linear or branched monoalcohols, having from 1 to 8 carbon atoms, such as ethanol, propanol, butanol, isopropanol and isobutanol, and a combination thereof.

The present invention also relates to a non-therapeutic cosmetic process for the care and/or revitalization of keratinous substances, such as the skin, in particular the skin of the face, comprising the steps of:

(1) wetting of the keratinous substance:

(2) application of the sheet-type cosmetic product according to the present invention to the wet keratinous substance; And

(3) leaving the product applied to the keratinous substance for a certain period of time; And

(4) removal of the product from the keratinous substance by rinsing with water; Or

(4’) separation of the product from the keratinous substance, and

(5) removal of a residue of the keratinous substance product by rinsing with water.

There shows an embodiment of the present invention of a facial mask.

After extensive research, the inventors discovered with surprise that a sheet-type product formed from (A) at least one water-soluble/dispersible substrate; and (B) at least one coating layer disposed on the water soluble/dispersible substrate, which comprises (b1) at least one clay and (b2) at least one water soluble binder, has ease of application. improved use, being easy to remove from the skin after use, thereby realizing the present invention.

Thus, the product according to the present invention is a sheet-type cosmetic product, comprising:

(A) at least one water-soluble/dispersible substrate; And

(B) at least one coating layer disposed on the water-soluble/dispersible substrate, comprising (b1) at least one clay and (b2) at least one water-soluble binder.

Hereinafter, the product, method, process and use according to the present invention will be explained in more detail.

[Product]

The product according to the present invention is a cosmetic product, preferably a cosmetic product for a keratinous substance, and more preferably a cosmetic product for the care and/or revitalization of keratinous substances. By keratinous substance, we mean here a material containing keratin as the main constituent element, and by way of example, the skin, the skin of the face, the scalp, the lips, and others. Preferably, the keratinous substance here is the skin, in particular the skin of the face.

In one embodiment of the present invention, the product according to the present invention is a skin care product, and in particular a facial skin care product.

The product according to the present invention comprises (A) at least one water soluble/dispersible substrate and (B) at least one coating layer on the water soluble/dispersible substrate. The coating layer (B) comprises (b1) at least one clay and (b2) at least one water-soluble binder. In other words, the product according to the present invention is formed from (A) at least one water-soluble/dispersible substrate and (B) at least one coating layer on the water-soluble/dispersible substrate. water, which comprises (b1) at least one clay and (b2) at least one water-soluble binder. The ingredients in the product will be described in detail below.

(A) Water soluble/dispersible substrate

The product according to the present invention comprises (A) at least one water-soluble/dispersible substrate as a substrate or carrier. Only one type of water soluble/dispersible substrate can be used, but two or more different types of water soluble/dispersible substrates can be used in combination.

The term “water soluble/dispersible substrate” here designates a substrate in the form of sheet, paper or film and which is soluble/dispersible in water. The term "water soluble/dispersible" here indicates a substance that disintegrates and/or dissolves upon immersion in water at 25°C, for example over a period of seconds or minutes to several days without agitation. In one embodiment, the "water soluble/dispersible" substrate of the present invention disintegrates and/or dissolves upon immersion in water at 25°C in less than one minute.

The water soluble/dispersible substrate may be in the form of fibers, such as woven fibers, knitted fibers, nonwoven fibers, and/or polymer mesh. The term "non-woven" here refers to a substrate including fibers in which the individual fibers or filaments are arranged in a haphazard manner in a sheet-like structure and which are neither woven nor knitted.

The water soluble/dispersible substrate is composed of at least one water soluble/dispersible polymer. The water-soluble/dispersible polymer can be chosen from water-soluble polymers.

Preferably, the water-soluble polymer may be a water-soluble film-forming polymer. Synthetic and/or natural water-soluble film-forming polymers can be used.

As the water-soluble film-forming polymer used in the present invention, it is possible to mention:

- polysaccharides, including starches, pullulans, celluloses, derivatives thereof, and combinations thereof

- proteins, such as proteins of plant origin, such as wheat or soy proteins; proteins of animal origin, such as keratins, for example keratin hydrolysates and sulfonic keratins;

- acrylic polymers or copolymers, such as polyacrylates or polymethacrylates;

- vinyl polymers, such as polyvinylpyrrolidones, copolymers of methylvinyl ether and malic anhydride, copolymer of vinyl acetate and crotonic acid, copolymers of vinylpyrrolidone and vinyl acetate, copolymers of vinylpyrrolidone and caprolactam, or polyvinyl alcohol;

- anionic, cationic, amphoteric or non-ionic polymers of chitin or chitosan;

- gum arabic, guar gum, xanthan compounds or karaya gum;

- alginates and carrageenans;

- glycoaminoglycans, hyaluronic acid and its compounds;

- lacquer resin, sandaraque gum, dammars, elemis or copals;

- a deoxyribonucleic acid;

- mucopolysaccharides, such as chondroitin sulfates;

and their mixtures.

Advantageously, the water-soluble polymer used in the present invention is chosen from the group consisting of celluloses and derivatives thereof, and polyvinyl alcohol, and a mixture thereof. Preferred examples of cellulose derivatives include cellulose ethers, including methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, ethylhydroxyethylcellulose, carboxymethylcellulose, and quaternized cellulose compounds.

As commercially available products of hydroxypropyl methylcellulose polymer (HPMC), it is possible to mention those available under the trade names METHOCEL K35, METHOCEL A15LV, METHOCEL Premium E5 LV and K35 LV of Dow chemical co.

The water-soluble/dispersible substrate may further comprise at least one water-insoluble polymer.

The term “water insoluble” here indicates that a substance does not dissolve or break down easily when immersed in water.

The water-insoluble polymer may be in the form of fibers, such as woven fibers, knitted fibers, non-woven fibers and/or polymer mesh. Preferably, the water-insoluble polymer is in the form of non-woven fibers.

The water-insoluble polymer may consist of natural fibers, synthetic fibers or mixtures thereof. Non-limiting examples of synthetic fibers are polyester, a polyolefin (polypropylene, polyethylene), a polyamide (Nylon 6, Nylon 66), viscose, acrylic fibers, modacrylic fibers, polyvinylidene chloride and spandex. Examples of natural fibers include cellulosic fibers (such as wood pulp, cotton, hemp, jute and linen fibers), silk and keratin (such as wool and camel hair).

In a preferred embodiment of the present invention, the water-insoluble polymer comprises natural fibers, particularly cellulosic fibers, such as wood pulp.

As non-limiting examples of commercially available water soluble/dispersible substrates, mention may be made of water soluble paper available from Nippon Paper Papilia, smartSolve and Aquashol cooperation, as well as fibrous materials such as Kuraray PVA fiber non-woven/woven materials, etc. An example of the commercially available water soluble/dispersible substrate is water soluble paper sold under the name 30MDP available from Nippon Paper Papilia.

A thickness of the water-soluble/dispersible substrate is not particularly limited, but in general, the water-soluble/dispersible substrate has a thickness in the range of 0.01 mm to 0.7 mm; more preferably from 0.02 mm to 0.5 mm, and even more preferably from 0.03 mm to 0.2 mm.

The water soluble/dispersible substrate can be manufactured using a conventional papermaking process or any type of thin sheet casting technology.

(B) Coating layer

The product according to the present invention comprises (B) at least one coating layer disposed on the water-soluble/dispersible substrate (A). A coating layer may be provided on one side of the water soluble/dispersible substrate (A), or two coating layers may be provided on both sides of the water soluble/dispersible substrate (A).

Preferably, the coating layer is disposed on one side of the water soluble/dispersible substrate (A). In this embodiment, the product of the present invention comprises a coating layer.

The content of the coating layer(s) may be 1 g/m ² or more, preferably 5 g/m ² or more, more preferably 10 g/m ² or more, and even more preferably 15 g/m ² or more, and/or may be 200 g/m ² or less, preferably 100 g/m ² or less, more preferably 70 g/m ² or less , and even more preferably 50 g/m ² or less of the sheet type cosmetic product.

The content of the coating layer(s) may be in the range of 1 g/m ² to 200 g/m ² , preferably 5 g/m ² to 100 g/m 2, more preferably 5 g/m 2 to 100 g/m ² preferably from 10 g/m ² to 70 g/m ² , and even more preferably from 15 g/m ² to 50 g/m ² of the sheet type cosmetic product.

The coating layer comprises (b1) at least one clay and (b2) at least one water-soluble binder. In other words, the clay (b1) and the water-soluble binder (b2) are applied, deposited or coated on the water-soluble/dispersible substrate (a). The ingredients of the coating layer will be described in detail below.

(b1) Clay

The coating layer of the present invention comprises (b1) at least one clay. Only one type of clay can be used, but two or more different types of clay can be used in combination.

The term "clay" here refers to a natural material composed primarily of fine-grained minerals, which is generally plastic at an appropriate water content and hardens when dried or fired. Although clay usually contains phyllosilicates, it may contain other materials that impart plasticity and harden when dried or fired. Associated phases in clay may include materials that do not impart plasticity and organic matter. A common definition is that of the Penguin Scientific Dictionary, namely "finely divided rock materials whose mineral components are various silicates, mainly magnesium or aluminum". Clay may include kaolinite (typically defined as [Si ₄ ]Al ₄ O ₁₀ (OH) _8.n H ₂ O (n = 0 or 4)), illite (typically defined as M _x [Si _6.8 Al _1.2 ]Al ₃ Fe _0.025 Mg _0.75 O ₂₀ (OH) ₄ ), vermiculite (typically defined as M _x [Si ₇ Al]AlFe _0.05 Mg _0.5 O ₂ (OH ) ₄ ), smectite (typically defined as M _x [Si ₈ ]Al _3.2 Fe _0.2 Mg _0.6 O ₂ (OH) ₄ , and chlorite (typically defined as (Al(OH) _{2 .55} )4[Si _6.8 AlO _1.2 }Al _3.4 Mg _0.6 ) ₂₀ (OH) ₄ ).

Another definition, frequently used by chemists, is "a sediment or sedimentary rock of natural origin composed of one or more minerals and accessory compounds, the whole being usually rich in hydrated aluminum silicate, iron or magnesium, hydrated alumina, or iron oxide, exhibiting particles primarily of colloidal or quasi-colloidal size, and commonly developing plasticity when sufficiently pulverized and wetted" (see Kirk-Othmer, Encyclopaedia of Chemical Technology, Volume 5, page 544, 2nd edition, John Wiley and Sons, Inc., New York, 1964). Examples of clays are given in the book “Clay mineralogy, S. Caillere, S. Henin, M. Rautureau, 2nd edition 1982, Masson”. Clays can be of natural or synthetic origin.

Hydrophilic clay includes smectites such as saponites, hectorites, montmorillonites, bentonites and beidellite. Hydrophilic clay includes synthetic hectorites (also called laponites) such as the products sold by the company BYK-Chemie under the name Laporte Laponite XLG, Laponite RD, Laponite RDS (these products are sodium silicates and magnesium silicates, in particularly sodium, lithium and magnesium), bentonites such as the product sold under the name Bentone® HC Rheox, magnesium silicates and aluminum-based products such as the hydrated products sold by Vanderbilt Company under the name Ultra Veegum®, Veegum® HS, Veegum® DGT, or calcium silicates, and in particular the synthetic form sold by the company Imerys under the name Micro-cel® C.

Fuller's earth is mainly made up of hydrated aluminum silicates which contain metal ions such as magnesium, sodium and calcium in their structure. Montmorillonite is the main clay mineral of fuller's earth, but other minerals such as kaolinite, attapulgite, and palygorskite, among other components, may also be included.

A lipophilic clay designates a swellable clay in a lipophilic medium, the clay swells and forms a colloidal dispersion. Lipophilic clays include modified clays such as modified magnesium silicate (Bentone VS38 gel from Rheox), hectorites modified with a C ₁₀ to C ₂₂ fatty acid ammonium chloride, such as hectorite modified with distearyldimethylammonium ammonium chloride (CTFA name: Disteardimonium hectorite) sold under the name “Bentone 38 CE” by Rheox or Bentone® 38V by ELEMENTIS.

The origin of such a clay may be a natural or synthetic mineral clay, such as hectorite, bentonite and quaternized derivatives thereof, for example obtained by reaction of minerals with a quaternary ammonium compound, such such as stearalkonium bentonite, hectorites, quaternized hectorites such as Quaternium-18 hectorite, carbonates such as propylene carbonate, bentones, and others.

Non-limiting examples of clay which can be used in the present invention are fuller's earth, volcanic ash mud from Pinatubo in the Philippines, Aleppo clay from Syria, volcanic mud from Pulau Tiga from Malaysia, Nha Trang mud of Vietnam, white kaolinite of Korea, yellow loess of Korea, Jeju volcanic clay of Korea, Guanziling mud of Taiwan, Wudalianchi volcanic mud of China, black salt lake mud of Yuncheng from China, mineral mud from Tantou village in China, clay from China (kaolin), Maifan stone from China, Beppu onsen Fango clay from Japan, Kucha clay from Japan, Tanakura clay from Japan, Cambrian blue clay from Russia, Blue Lagoon mud from Iceland, Lake Saki mud from Ukraine, Karlovy Vary peat mud from Czech Republic, Heviz Georgikon peat mud of Hungary, the peat mud of the Austrian Alps, the Bad Wilsnack mud of Germany, the Bavarian mineral salt mountain mud of Germany, the volcanic mud of Freiburg of Germany, the Santorini mud of Greece, the mud of Mar Menor from Spain, Ischia Volcanic Mud from Italy, Euganean Thermal Mud from Italy, Yellow Illite Clay from France, French Green Clay - Montmorrillonite, Calistoga Mud from USA, sacred clay and ormalite from the United States, Redmond clay from the United States, arctic mineral mud from Canada, Tulum Mayan clay from Mexico, glacial clay from Canada, white clay Amazonian from Brazil, El Chillante volcanic thermal mud from Argentina, African healing clay and Australian olive green clay.

The content of the clay(s) in the coating layer(s) of the present invention may be 50% by weight or more, preferably 65% by weight or more, more preferably 80% by weight or more, and even more preferably 90% by weight or more, and/or may generally be 99.5% by weight or less, preferably 99% by weight or less, so more preferably 98% by weight or less and even more preferably 97% by weight or less, based on the total weight of the coating layer(s). All combinations of upper and lower limit values are available.

The coating layer(s) of the present invention may comprise clay(s) in an amount ranging from 50% to 99.5% by weight, preferably 65 % to 99% by weight, more preferably 80% to 98% by weight, and even more preferably 90% to 97% by weight, relative to the total weight of the layer(s) of coating.

(b2) Water-soluble binder

The coating layer of the present invention comprises (b2) at least one water-soluble binder. Only one type of water-soluble binder can be used, but two or more different types of water-soluble binders can be used in combination.

The water-soluble binder may have the function of adhering the clay (b1) to the coating layer, in particular of adhering the clay (b1) to the water-soluble/dispersible substrate (A).

In a preferred embodiment, the water-soluble binder (b2) comprises at least one polar polymer. In another preferred embodiment, the water-soluble binder (b2) is chosen from water-soluble film-forming polymers. As the water-soluble film-forming polymer used in the present invention, it is possible to mention:

- polysaccharides, including starches, pullulans, celluloses, derivatives thereof, and combinations thereof

- proteins, such as proteins of plant origin, such as wheat or soy proteins; proteins of animal origin, such as keratins, for example keratin hydrolysates and sulfonic keratins;

- acrylic polymers or copolymers, such as polyacrylates or polymethacrylates;

- vinyl polymers, such as polyvinylpyrrolidones, copolymers of methylvinyl ether and malic anhydride, copolymer of vinyl acetate and crotonic acid, copolymers of vinylpyrrolidone and vinyl acetate, copolymers of vinylpyrrolidone and caprolactam, or polyvinyl alcohol;

- anionic, cationic, amphoteric or non-ionic polymers of chitin or chitosan;

- gum arabic, guar gum, xanthan compounds or karaya gum;

- alginates and carrageenans;

- glycoaminoglycans, hyaluronic acid and its compounds;

- lacquer resin, sandaraque gum, dammars, elemis or copals;

- a deoxyribonucleic acid;

- mucopolysaccharides, such as chondroitin sulfates;

and their mixtures.

Advantageously, the water-soluble film-forming polymer is chosen from the group consisting of starch, pullulan, starch, cellulose, derivatives thereof, and a mixture of these. ci, polyvinyl alcohol, polyvinylpyrrolidone, and a mixture thereof.

The water-soluble binder (b2) may be the same as or different from the water-soluble/dispersible polymer forming the water-soluble/dispersible substrate (a). These materials can be distinguished from each other based on their functions and/or states. Specifically, the water soluble/dispersible polymer in the water soluble/dispersible substrate (a) forms the substrate, i.e., this polymer is part of the substrate, while the water soluble binder (b2) serves to make the clay (b1) adhere to the substrate. Those skilled in the art can easily distinguish them by analyzing the product of the present invention. For example, the water-soluble binder (b2) is directly in contact with the clay (b1) and may be present on the surface of the clay (b1). On the other hand, the water-soluble/dispersible polymer in the water-soluble/dispersible substrate (a) is positioned inside the substrate.

In one embodiment of the present invention, the water-soluble binder (b2) is different from the water-soluble/dispersible polymer forming the water-soluble/dispersible substrate (a).

The content of the water-soluble binder(s) in the coating layer(s) of the present invention may be 0.1% by weight or more, preferably 0. 5% by weight or more, more preferably 1% by weight or more, and even more preferably 2% by weight or more, and/or may generally be 15% by weight or less, preferably 10% by weight or less, more preferably 7% by weight or less, and even more preferably 5% by weight or less, relative to the total weight of the coating layer(s). . All combinations of upper and lower limit values are available.

The coating layer(s) of the present invention may comprise the water-soluble binder(s) in an amount ranging from 0.1% to 15% by weight, preferably 0.5% to 10% by weight, more preferably 1 to 7% by weight, and even more preferably 2 to 5% by weight, relative to the total weight of the coating layer(s).

(Other ingredients)

The coating layer(s) of the present invention may include optional ingredients other than clay (b1) and water-soluble binder (b2).

- Cosmetically active principle

The coating layer of the present invention may comprise at least one cosmetically active principle. Only one type of the cosmetically active ingredient may be used, but two or more different types of the cosmetically active ingredients may be used in combination.

The cosmetically active ingredient may be a skin care agent. As skin care agents, it is possible to mention whitening agents, lightening agents, antioxidants, cleansing agents, free radical scavengers, moisturizers, skin tone modifying agents, anti-aging agents. acne, anti-aging agents, anti-wrinkle agents, anti-inflammatory agents, skin texture treatment agents, antiperspirant agents, aesthetic products, antibacterial agents, refreshing active agents, active sweat absorption agents, nourishing agents, sebum, an agent for oil absorption, and moisture absorbers and any combination thereof.

Non-limiting examples of skin whitening or lightening agents include, but are not limited to, skin tone modifying pigments, reflective particulate materials, blurring agents and any mixtures thereof.

The skin tone modifying agents may be selected from skin tone modifying pigments, including, but not limited to, talc, mica, silica, titanium oxide, zinc oxide and/or mica. coated with titanium oxide, borosilicates; hydrophobically modified zinc oxides; hydrophobically modified titanium dioxides and titanium-zinc oxide composites.

Examples of the antioxidants, anti-inflammatory and/or cooling active agents and/or sweat absorbing active agents for use in the invention include, but are not limited to, vitamin C, vitamin E, vitamin C and vitamin D derivatives, lycopene, carotene, lecithin, rice bran lipids, rice bran oils, menthol; yogurt, silicate menthols, methyl lactates; almond oil; peanut oil; sunflower oil ; kulthi bean powder; olive oil ; sublimated or non-sublimated silica, hydrophobically modified silica, hydrophilically modified silica and a mixture/composite thereof.

The amount of the cosmetically active ingredient(s) in the coating layer(s) of the present invention is not particularly limited, but generally may be in the range of 0.01%. at 10% by weight, preferably 0.05% to 5% by weight, and more preferably 0.1 to 3% by weight, relative to the total weight of the coating layer(s) . In one embodiment of the present invention, the coating layer is free of cosmetically active ingredients.

- Polyol

The coating layer of the present invention may comprise at least one polyol. Only one type of polyol may be used, but two or more different types of polyols may be used in combination.

The term "polyol" herein means an alcohol having two or more hydroxy groups and does not include a saccharide or derivative thereof. The derivative of a saccharide includes a sugar alcohol obtained by reducing one or more carbonyl groups of a saccharide, as well as a saccharide or sugar alcohol in which the hydrogen atom(s) in one or more hydroxy groups of this has (have) been replaced by at least one substituent such as an alkyl group, a hydroxyalkyl group, an alkoxy group, an acyl group or a carbonyl group.

The polyol in the present invention can function as a plasticizer which increases the flexibility and strength of the product and, in some cases, polyols can provide skin conditioning benefits.

The polyol may be a C ₂ -C ₂₄ polyol, preferably a C ₂ -C ₉ polyol, comprising at least 2 hydroxy groups, and preferably 2 to 5 hydroxy groups. The polyol can be chosen from glycerins and derivatives thereof, as well as glycols and derivatives thereof. The polyol may be chosen from the group consisting of glycerin, diglycerin, polyglycerin, ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, pentylene glycol, hexylene glycol, C ₆ -C _{24 polyethylene glycol,} 1,3-propanediol, 1,4-butanediol and 1,5-pentanediol, dextrins and sorbitols.

In a preferred embodiment, the polyols are chosen from glycerin, glycols such as ethylene glycol, propylene glycol, butylene glycols and diethylene glycols, dextrins and sorbitols.

The content of the polyol(s) in the coating layer(s) of the present invention is not particularly limited, but can generally be in the range of 0.001 to 20% by weight, preferably from 0.01 to 15% by weight, more preferably from 0.1 to 10% by weight, and even more preferably from 1 to 5% by weight, relative to the total weight of the layer(s). s) covering. In one embodiment of the present invention, the coating layer is free of polyols.

- Dyes

The coating layer of the present invention may include at least one colorant. Only one type of dye may be used, but two or more different types of dyes may be used in combination.

Dyes which may be used in the present invention may be inorganic or organic dyes. Preferably, the colorant comprises at least one inorganic colorant, such as pigments and lakes. As a dye it is possible to mention titanium dioxide, iron oxide yellow, iron oxide red, iron oxide black and caramel, carmine, carbon black, D & C Red 7 Lake, FD&C Yellow 5 Lake, FD&C Yellow dye, FD&C Blue 1 dye.

The amount of the colorant(s) in the coating layer(s) of the present invention is not particularly limited, but may generally be in the range of 0.001% to 10% by weight, preferably from 0.005% to 5% by weight, and more preferably from 0.01 to 1% by weight, relative to the total weight of the coating layer(s). In one embodiment of the present invention, the coating layer is free of colorants.

- Optional additives

The coating layer of the present invention may also comprise any optional additive(s) usually used in the field of cosmetics, chosen, for example, from anionic, cationic, or non-ionic surfactants. ionic or amphoteric, dispersants, perfumes, neutralizers, antiseptics, chelating agents and mixtures thereof.

In one embodiment of the present invention, the product according to the present invention is a skin care product, and in particular a facial skin care product. In one embodiment, the sheet type cosmetic product is intended for the treatment or care of oily skin, for example, for the treatment or care of oily facial skin.

In particular, the product according to the present invention can be applied to a wet surface of the skin and absorbs impurities, sebum and excess oil from the skin.

In one embodiment, the product is intended to mattify the skin.

In one embodiment, the product is intended for relaxing cosmetic treatments.

In one embodiment, the product is intended for refreshing skin care.

In addition, the present invention can also produce effects of regulating the oiliness of keratinous substances, removing blackheads and/or reducing pores of keratinous substances, and imparting shine to keratinous substances.

The functionality of the product of the present invention depends mainly on the activities of the active ingredients. Moisturizing, whitening and anti-aging features are the most common of such a product, especially a facial mask or facial compress.

In addition, other active skin care ingredients with cosmetic benefits such as whitening, anti-wrinkle, etc. are also available. may be present or added to the coating layer(s), and may diffuse into the skin during the application time.

The sheet-type cosmetic product of the present invention generally has a thickness in the range of 0.01 mm to 1 mm; more preferably from 0.05 mm to 0.5 mm, and even more preferably from 0.07 mm to 0.12 mm.

The product may have a desired shape depending on the intended use. The most common format for product distribution is folded, packaged in a single-use sachet. In some cases, products are distributed in a packaged roll format. Such a packaged roll comprises a roll of substrate having a plurality of products of predetermined shape, for example a plurality of facial masks. The product can be applied to such an applicator body after being detached from the wrapped roll or any other packaging.

The shape of the product depends on its functionality and the targeted areas. An example use of the product may be in the form of a facial mask or facial compress, which may be cut into the shape of a face with slits for the eyes, mouth and neck. nose. The products are, for example, chosen from masks, wipes and facial compresses.

In one embodiment, the product is a skin mask.

In one embodiment, the product is a facial mask.

There depicts an embodiment of the present invention, wherein a facial mask is in two parts, prior to use. In this embodiment, the facial mask can be cut into two parts: an upper part and a lower part to facilitate application to the upper part of the face and the lower part of the face, respectively. Such a two-piece face mask has an upper portion intended to be placed on the upper portion of the face and a lower portion intended to be placed on the lower portion of the face.

[Manufacturing method]

The present invention also relates to a method for preparing the sheet-type cosmetic product according to the present invention.

Preferably, the method of preparing the sheet-type cosmetic product according to the present invention comprises the steps of:

(i) preparation of at least one water-soluble/dispersible substrate (A),

(ii) preparation of a coating solution by mixing (b1) at least one clay and (b2) at least one water-soluble binder in at least one solvent,

(iii) applying the coating solution to the water soluble/dispersible substrate (A), and

(iv) drying the coating solution applied to form the coating layer (B) to obtain the sheet-like cosmetic product.

Step (i) is a step of preparing at least one water-soluble/dispersible substrate (A). The water soluble/dispersible substrate (a) is the same as that explained in the “Product” section above, and therefore the same explanations can be applied to the water soluble/dispersible substrate (a) here.

Step (ii) is a step of preparing a coating solution by mixing (b1) at least one clay and (b2) at least one water-soluble binder in at least one solvent. The at least one clay (b1) and the at least one water-soluble binder (b2) are the same as those explained in the “Product” section above, and the same explanations can therefore be applied to the at least one clay (b1) and at least one water-soluble binder (b2) here.

The solvent used in step (ii) is not particularly limited, but is preferably chosen from solvents other than water. Non-limiting examples of the solvent include, for example, lower monoalcohols, linear or branched, preferably lower monoalcohols, linear or branched, having from 1 to 8 carbon atoms, such as ethanol, propanol, butanol, isopropanol and isobutanol, and a combination thereof.

The amount of the clay(s) in the coating solution may be 1% by weight or more, preferably 5% by weight or more, more preferably 10% by weight or more, and even more preferably 20% by weight or more, based on the total weight of the solution. The amount of the clay(s) in the coating solution may be 60% by weight or less, preferably 55% by weight or less, more preferably 50% by weight or less, and even more preferably 45% by weight or less, based on the total weight of the solution. All combinations of upper and lower limit values are available.

The coating solution may comprise the clay(s) in an amount ranging from 1% to 60% by weight, preferably 5% to 55% by weight, more preferably 10% to 50% by weight. % by weight, and even more preferably from 20% to 45% by weight, relative to the total weight of the solution.

The amount of the water-soluble binder(s) in the coating solution may be 0.1 wt% or more, preferably 0.3 wt% or more, more preferably 0.3 wt% or more. preferably 0.5% by weight or more, and even more preferably 0.7% by weight or more, relative to the total weight of the solution. The amount of the water-soluble binder(s) in the coating solution may be 20% by weight or less, preferably 15% by weight or less, more preferably 10%. by weight or less, and even more preferably 5% by weight or less, relative to the total weight of the solution. All combinations of upper and lower limit values are available.

The coating layer may comprise the water-soluble binder(s) in an amount ranging from 0.1% to 20% by weight, preferably 0.3% to 15% by weight. % by weight, more preferably from 0.5% to 10% by weight, and even more preferably from 0.7% to 5% by weight, relative to the total weight of the solution.

In one embodiment of the present invention, the amount of the polyol(s) in the coating solution may be 0.1% by weight or more, preferably 0.5% by weight or more, more preferably 0.5% by weight or more, and even more preferably 1.5% by weight or more, relative to the total weight of the solution. The amount of the polyol(s) in the coating solution may be 20% by weight or less, preferably 15% by weight or less, more preferably 10% by weight or less, and even more preferably 5% by weight or less, based on the total weight of the solution. All combinations of upper and lower limit values are available.

In one embodiment of the present invention, the coating solution may comprise the polyol(s) in an amount ranging from 0.1% to 20% by weight, preferably 0.5%. to 15% by weight, more preferably 1% to 10% by weight, and even more preferably 1.5% to 5% by weight, relative to the total weight of the solution.

In one embodiment of the present invention, the coating solution includes water in an amount less than 5% by weight, preferably less than 3% by weight, more preferably less than 1% by weight, of even more preferably less than 0.5% by weight, and in particular less than 1% by weight, relative to the total weight of the coating solution. In another embodiment of the present invention, the coating solution is anhydrous.

Step (ii) may include adding one or more optional ingredients, such as cosmetically active ingredients, polyols, colorants and/or optional additives as explained above, to the coating solution . Therefore, the coating solution may include one or more optional ingredients selected from cosmetically active ingredients, polyols, colorants and optional additives.

The method of mixing the ingredients is not particularly limited, and it is possible to employ a conventional mixing means, such as a stirrer and/or homogenizer.

Step (iii) is a step of applying the coating solution to the water soluble/dispersible substrate (A). The method of applying the coating solution to the water soluble/dispersible substrate (A) is not particularly limited, and any conventional method can be employed. For example, the coating solution can be applied to the substrate using any wet coating process, such as dip coating, squeegee coating, bar coating, curtain coating, and frame printing. .

Preferably, the coating solution is applied to both sides of the water soluble/dispersible substrate (A), so that the product of the present invention comprises two coating layers.

Step (iv) is a step of drying the coating solution applied to form the coating layer (B) and thus obtain the sheet-type cosmetic product. The drying temperature of the coating layer can generally be between 40°C and 200°C, preferably between 40°C and 100°C, and more preferably between 40°C and 70°C. The drying time of the coating layer can generally be between a few seconds, for example one second, two seconds, three seconds, four seconds or five seconds 10 minutes and 30 minutes, preferably between a few seconds and 15 minutes, and more preferred way between a few seconds 30 minutes and 5 minutes.

The dried product of the present invention can be shaped into the appropriate desired shape. Shaping can be done by cutting the sheet-shaped product to the desired shape.

[Process and cosmetic use]

The present invention also relates to a non-therapeutic method or use, preferably a non-therapeutic cosmetic method or use, and more preferably a cosmetic method or use for the care and/or revitalization of keratinous substances, such as the skin, especially the skin of the face.

In one embodiment of the present invention, the present invention relates to a cosmetic process for the care and/or revitalization of keratinous substances, such as the skin, in particular the skin of the face, comprising the steps of:

(1) wetting of the keratinous substance:

(2) application of the sheet-type cosmetic product according to the present invention to the wet keratinous substance; And

(3) leaving the product applied to the keratinous substance for a certain period of time; And

(4) removal of the product from the keratinous substance by rinsing with water; Or

(4’) separation of the product from the keratinous substance, and

(5) removal of a residue of the keratinous substance product by rinsing with water.

In another embodiment of the present invention, the present invention relates to a use of the sheet type cosmetic product for the care and/or revitalization of keratinous substances, such as the skin, in particular the skin of the face, comprising the steps of:

(1) wetting of the keratinous substance:

(2) application of the sheet-type cosmetic product according to the present invention to the wet keratinous substance; And

(3) leaving the product applied to the keratinous substance for a certain period of time; And

(4) removal of the product from the keratinous substance by rinsing with water; Or

(4’) separation of the product from the keratinous substance, and

(5) removal of a residue of the keratinous substance product by rinsing with water.

Step (1) is a step of wetting or humidifying the keratinous substance to be maintained or revitalized to wet it. For this purpose, any format of a composition comprising water can be applied to the keratinous substance, for example, an aqueous solution, a toner, a micellar water, a lotion, a milky lotion, a paste, a serum, a suspension, a dispersion, an emulsion, and the like. The composition may include cosmetically acceptable ingredients or cosmetically active ingredients as mentioned above.

In one embodiment of the present invention, the composition to be applied to the keratinous substance in step (1) is water. In this embodiment, step (1) is a step of applying water to the keratinous substance to be maintained or revitalized.

Step (2) is a step of applying the sheet-type cosmetic product of the present invention to the wet keratinous substance which was treated in step (1). This step can be carried out, for example, by placing the sheet-type cosmetic product on the keratinous substance that was wetted in step (1).

Step (3) is a step of leaving the product applied on the keratinous substance for a certain time in order to dry the product. This step may be a step consisting of waiting a sufficient period of time, called "application time", after bringing said product according to the present invention into contact with the keratinous substance, until said product has dried naturally.

The application time of step (3) may be in the range of 1 minute to 30 minutes, preferably 3 minutes to 25 minutes, more preferably 5 minutes to 20 minutes, and even more preferably preferred from 10 minutes to 20 minutes. Step (3) can be carried out at room temperature (25°C) and at atmospheric pressure (10 ⁵ Pa).

In step (3), the product absorbs impurities, sebum and excess oil from the keratinous substance.

In one embodiment of the invention, the product applied to the keratinous substance is removed by rinsing the keratinous substance with water in step (4) after step (3). Since the sheet-type cosmetic product of the present invention consists of (A) at least one water-soluble/dispersible substrate; and (B) at least one coating layer disposed on the water-soluble/dispersible substrate, comprising (b1) at least one clay and (b2) at least one water-soluble binder. For example, the product can be rinsed off by rubbing it or washing it with water with your hands.

In another embodiment of the present invention, the product applied to the keratinous substance is detached from the keratinous substance in step (4') after step (3). Then, any product residue remaining on the keratinous substance is removed by rinsing with water in step (5). The product residue can be removed by rinsing by rubbing it or washing it with water with your hands.

EXAMPLES

The present invention will be described in more detail using examples which should not, however, be interpreted as limiting the scope of the present invention. The examples were carried out at room temperature (25 °C) and atmospheric pressure (10 ⁵ Pa), unless otherwise indicated.

[Examples 1 and 2]

The sheet-type cosmetic products according to the present invention were prepared in accordance with the following protocol. Firstly, a water-soluble substance in the form of 30MDP paper (thickness: 0.065 mm) obtained from Nippon Paper Papilia was prepared. The coating solutions were then prepared by mixing kaolin, polyvinylpyrrolidone, isopropyl alcohol, and glycerin, where appropriate, in the formulation ratio shown in Table 1 with a homogenizer. The numerical values shown in Table 1 are all based on “wt%” as active raw materials. Each of the resulting coating solutions was applied to the water-soluble substance by a bar coating process on one side of the substrate. The substrate was then dried at 70°C for several seconds to obtain the sheet-like cosmetic products of the present invention. The amount of the coating layer was 30 g/m ² of the sheet-like product. The thickness of the sheet type product was approximately 0.1 mm.

Ingredients Coating Solution Formulation Example 1 Example 2 Kaolin 40 38 Polyvinylpyrrolidone 1.5 1 Isopropylic alcohol 58.5 59 Glycerin - 2

The sheet-like product obtained was cut into the shape of a facial mask, as illustrated in the .

Three experts used the product according to the following process:

(1) wetting their facial skin with water;

(2) application of the sheet-type cosmetic product in the form of a facial mask to a wet face;

(3) leaving the product applied on the face for 15 minutes; And

(4) removal of the product by rinsing the face with water while rubbing it with the hands.

The products could be easily removed from their face just by rubbing with their hands with water. Excess sebum and oil could be successfully removed from their face. The mattifying effect could also be confirmed.

Claims (8)

Sheet type cosmetic product, comprising:
(A) at least one water-soluble/dispersible substrate; And
(B) at least one coating layer disposed on the water soluble/dispersible substrate, comprising (b1) at least one clay and (b2) at least one water soluble binder. Product according to claim 1, in which the product is a mask for the skin, preferably a mask for the face. A product according to any preceding claim, wherein the water soluble/dispersible substrate (A) comprises a water soluble/dispersible polymer. Product according to claim 3, wherein the water soluble/dispersible polymer is a water soluble polymer selected from the group consisting of celluloses and derivatives thereof, polyvinyl alcohol, and a mixture of these. Product according to any one of the preceding claims, in which the water-soluble binder (b2) is chosen from the group consisting of starch, pullulan, cellulose, derivatives thereof, and a mixture thereof, polyvinyl alcohol, polyvinylpyrrolidone, and a mixture thereof. Product according to any one of claims 3 to 5, wherein the water-soluble binder (b2) is different from the water-soluble/dispersible polymer included in the water-soluble/dispersible substrate (A). Method of manufacturing the sheet-type cosmetic product according to any one of the preceding claims, comprising the steps of:
(i) preparation of at least one water-soluble/dispersible substrate (A),
(ii) preparation of a coating solution by mixing (b1) at least one clay and (b2) at least one water-soluble binder in at least one solvent,
(iii) applying the coating solution to the water soluble/dispersible substrate (A), and
(iv) drying the coating solution applied to form the coating layer (B) to obtain the sheet-like cosmetic product. Method according to claim 7, in which the solvent in step (ii) is chosen from lower monoalcohols, linear or branched, preferably lower monoalcohols, linear or branched, having from 1 to 8 carbon atoms, such as l ethanol, propanol, butanol, isopropanol and isobutanol, and a combination thereof.