JP2022095240A - Combination of modified starch/c13-c15 fatty acid/clay with amphoteric surfactant - Google Patents

Abstract

The present invention provides a composition that can be rinsed off from keratinous materials, such as skin, and leave an enhanced deposit of clay on the keratinous material after rinsing the composition from the keratinous material. (a) at least one modified starch; (b) at least one C13-C15 fatty acid; (c) at least one clay; and (d) at least one amphoteric surfactant. wherein the mass ratio of (d) the amount of amphoteric surfactant/(b) the amount of C13-C15 fatty acids is 0.5 or more, preferably 0.6 or more, more preferably 0.7 or more thing. [Selection drawing] Fig. 1

Description

The present invention relates to a composition comprising a combination of modified starch, C ₁₃ to C ₁₅ fatty acids, clay and an amphoteric surfactant, and the use of the composition.

The use of mineral clay as a medicinal and beauty tool has long been popular.

Clay is used to exfoliate and improve skin circulation while absorbing excess oil, dirt and toxins from the skin. Some clays, such as bentonite clay, are mainly ingested for medicinal purposes such as detoxification or mineral deficiency.

Other clays such as French green clay and Rasul clay are applied externally for skin conditions and cosmetic purposes. Clay exists in various colors such as red, green, white, and gray, and can have a wide range of textures, from coarse and heavy to fine and fluffy. The various colors of clay occur due to the natural mineral content of the clay.

In modern cosmetics, such clays are used as key active ingredients in oil control products and are sold in the form of oil control facial cleansers and the like. Clay is included in some rinse-off cosmetic compositions.

A rinse-off cosmetic composition containing clay can leave clay on the keratinous material, such as the skin, even after the composition has been rinsed off the keratinous material. Adhesion of residual clay, if present, can contribute to oil regulation.

It was discovered that the combination of modified starch and C ₁₃ -C ₁₅ fatty acids can enhance the adhesion of clay on keratinous substances such as skin.

There is still a need to further enhance the adhesion of clay on keratinous substances such as the skin.

US Pat. No. 4,456702 US Pat. No. 5037929 US Pat. No. 5131953 US Pat. No. 5149799 US Pat. No. 3137592 US Pat. No. 2528378 US Pat. No. 2,781,354

Chapter XXII, "Production and Use of Pregelatinized Starch", Starch: Chemistry and Technology, Volume III-Industrial Aspects, R. L. Whistler and E. F. Paschall, Editors, Academic Press, New York 1967 Penguin Dictionary of Science Kirk-Othmer, Encyclopaedia of Chemical Technology, Volume 5, pp. 544, 2nd Edition, John Wiley and Sons, Inc., New York, NY, 1964 Book "Clay mineragy", S. Caillere, S. Henin, M. Rautureau, 2nd Edition, 1982, Masson CTFA International Cosmetic Ingredient Dictionary & Handbook, 15th Edition, 2014 CTFA Dictionary, 3rd Edition, 1982 CTFA Dictionary, 5th Edition, 1993

It is an object of the present invention to provide a composition that can be rinsed off from keratinous substances such as skin and, after rinsing off the composition from the keratinous material, can leave the enhanced adhesion of clay on the keratinous material. That is.

The above purpose is
(a) With at least one modified starch,
(b) At least one C ₁₃ to C ₁₅ fatty acid and
(c) At least one type of clay,
(d) A composition comprising at least one amphoteric surfactant.
The mass ratio of (d) the amount of amphoteric tenside / (b) the amount of C ₁₃ to C ₁₅ fatty acids is 0.5 or more, preferably 0.6 or more, more preferably 0.7 or more.
It can be achieved by the composition.

(a) The modified starch may be hydrophobic, preferably hydroxyalkyl modified starch, more preferably hydroxyethyl starch, hydroxypropyl starch, hydroxyethyl phosphate starch, hydroxypropyl phosphate phosphate, and mixtures thereof. You can choose from the group consisting of.

The amount of (a) modified starch in the composition according to the present invention is 0.01% by mass to 15% by mass, preferably 0.1% by mass to 10% by mass, and more preferably 0.5% by mass to the total mass of the composition. It may be 5% by mass.

(b) The C ₁₃ to C ₁₅ fatty acids may be myristic acid.

The amount of (b) C ₁₃ to C ₁₅ fatty acids in the composition according to the present invention is 1% by mass to 20% by mass, preferably 2% by mass to 15% by mass, more preferably 2% by mass, based on the total mass of the composition. It may be 3% by mass to 10% by mass.

(c) Clay can be selected from the group consisting of hectorite, kaolin, talc, and mixtures thereof.

The amount of (c) clay in the composition according to the present invention is 1% by mass to 40% by mass, preferably 2% by mass to 35% by mass, and more preferably 3% by mass to 30% by mass, based on the total mass of the composition. It may be% by mass.

A complex can be formed between (a) modified starch and (b) C ₁₃ to C ₁₅ fatty acids.

(c) Clay is a complex formed of (a) modified starch and (b) C ₁₃ to C ₁₅ fatty acids, preferably (a) modified starch and (b) C ₁₃ to C ₁₅ fatty acids. More preferably, it may be coated with a complex formed of hydrophobic modified starch and myristic acid.

(d) The amphoteric surfactant can be selected from betaine, amine oxides, and mixtures thereof.

The amount of (d) amphoteric surfactant in the composition according to the present invention is 1% by mass to 20% by mass, preferably 2% by mass to 15% by mass, and more preferably 3% by mass with respect to the total mass of the composition. It may be% to 10% by mass.

The composition according to the present invention may further contain (e) water.

The pH of the composition according to the invention may be greater than 7.0, preferably greater than 7.5, more preferably greater than 8.0.

The composition according to the present invention may be a cosmetic composition, preferably a rinse-off composition, more preferably a rinse-off cleansing composition.

The present invention also
It also relates to a cosmetic method for keratinous substances such as skin, which comprises the step of applying the composition according to the present invention to a keratinous substance.

The present invention also
(a) With at least one modified starch,
(b) At least one C ₁₃ to C ₁₅ fatty acid and
(d) In combination with at least one amphoteric surfactant
The mass ratio of (d) the amount of amphoteric tenside / (b) the amount of C ₁₃ to C ₁₅ fatty acids is 0.5 or more, preferably 0.6 or more, more preferably 0.7 or more.
To increase the adhesion of (c) at least one clay on keratinous substances such as skin,
Also related to use.

6 is a graph showing the gloss control of the compositions according to Example 1 and Comparative Example 1 immediately after (A) application (T0) and (B) 4 hours after application (T4h).

As a result of diligent studies, we can rinse off keratinous materials such as skin, and after rinsing off the composition from the keratinous material, we can leave the enhanced adhesion of clay on the keratinous material. It has been found that it is possible to provide the composition.

The compositions according to the invention are composed of (a) at least one modified starch, (b) at least one C ₁₃ to C ₁₅ fatty acid, and (c) at least one clay under certain conditions. d) Includes a combination with at least one amphoteric surfactant.

The composition according to the invention can be rinsed off from keratinous materials such as skin, and after rinsing off the composition from the keratinous material, the increased clay deposit can be left on the keratinous material. ..

Clay adhesion can contribute to oil control. Since the composition according to the present invention can increase the amount of clay adhered to the keratin substance such as skin, the composition according to the present invention can bring about an immediate and lasting oil content control effect. Therefore, for example, the composition according to the present invention can immediately and for a long time adjust or suppress unfavorable events such as a greasy appearance caused by an oily substance such as sebum on a keratin substance such as skin. can. In addition, the increased amount of clay adhered to the keratin substance such as skin can immediately and for a long time provide a smooth feel.

(c) Clay may be coated with (a) modified starch and (b) C ₁₃ -C ₁₅ fatty acids. (a) Modified starch and (b) C ₁₃ to C ₁₅ fatty acids can form a complex. Therefore, (c) clay may be coated with a complex formed of (a) modified starch and (b) C ₁₃ to C ₁₅ fatty acids. The complex is preferably formed from hydrophobic modified starch and myristic acid.

The hydrophobicity of (c) clay is a complex formed by (a) modified starch and (b) C ₁₃ to C ₁₅ fatty acids, preferably (a) modified starch and (b) C ₁₃ to C ₁₅ fatty acids. It can be fortified by the body, more preferably by a complex formed of hydrophobic modified starch and myristic acid. Thus, (c) clay may adhere more to keratinous substances such as skin due to (c) hydrophobic-hydrophobic interactions between clay and keratinous substances. This can result in an increase in the amount of (c) clay adhered to the keratinous material.

Furthermore, surprisingly, the additional use of (d) amphoteric surfactants can further enhance (c) clay adhesion on keratinous materials.

Without being bound by theory, (d) the cationic portion of the amphoteric surfactant may be due to (b) C ₁₃ -C ₁₅ fatty acids, (c) processed starch on clay and (b). The negative charge of the possible complex with the C ₁₃ to C ₁₅ fatty acids can be reduced, and therefore the clay having the possible complex with the reduced negative charge (c) such as skin that originally has the negative charge. It is convinced that it can be absorbed relatively easily on keratin substances.

Hereinafter, the present invention will be described in detail.

[Composition]
One of the aspects of the invention is
(a) With at least one modified starch,
(b) At least one C ₁₃ to C ₁₅ fatty acid and
(c) At least one type of clay,
(d) A composition comprising at least one amphoteric surfactant.
The composition has a mass ratio of (d) the amount of amphoteric tenside / (b) the amount of C ₁₃ to C ₁₅ fatty acids of 0.5 or more, preferably 0.6 or more, and more preferably 0.7 or more.

In one embodiment of the invention
The amount of (a) modified starch in the composition is 0.01% by mass to 15% by mass, preferably 0.1% by mass to 10% by mass, and more preferably 0.5% by mass to 5% by mass with respect to the total mass of the composition. % And
(b) The amount of C ₁₃ to C ₁₅ fatty acids is 1% by mass to 20% by mass, preferably 2% by mass to 15% by mass, and more preferably 3% by mass to 10% by mass with respect to the total mass of the composition. And
(c) The amount of clay is 1% by mass to 40% by mass, preferably 5% by mass to 35% by mass, more preferably 10% by mass to 30% by mass, based on the total mass of the composition.
The amount of (d) amphoteric surfactant in the composition according to the present invention is 1% by mass to 20% by mass, preferably 2% by mass to 15% by mass, and more preferably 3% by mass with respect to the total mass of the composition. It may be% to 10% by mass.

The composition according to the present invention may further contain (e) water.

(Modified starch)
The composition according to the invention comprises (a) at least one modified starch. A single type of modified starch may be used, or two or more different types of modified starch may be used in combination.

(a) Modified starch may be in powder form. In other words, (a) modified starch may be in the form of particles. In this case, (a) the particle size of the modified starch is not limited.

(a) It is preferable that the modified starch is film-forming, that is, capable of forming a film.

(a) Modified starch is based on base starch. The base starch, as used herein, is of any natural source and is intended to include all starches that may be suitable for use herein. Natural starch, as used herein, is found in nature. More preferred are plant-derived starches obtained by standard breeding techniques including crossbreeding, translocation, translocation, transformation, or by any other method of genetic engineering or chromosomal engineering to include variants thereof. be. In addition, artificial variants of the above common starches that can be produced by the known standard method of mutation breeding and starches derived from plants grown from varieties are also herein. Suitable.

Typical starch sources are cereals, tubers, roots, pods and fruits. Natural sources include corn (maze), pea, potato, sweet potato, banana, barley, wheat, rice, oat, sago, amaranth, tapioca (cassava), kuzukon, canna and morokoshi waxy varieties, as well as these low amylose and It can be a high amylose species. As used herein, the term "low amylose" starch is intended to contain starch containing up to about 10% by weight, particularly up to 5% by weight, more specifically no more than 2% by weight amylose. As used herein, the term "high amylose" starch is intended to contain starch containing at least about 50% by weight, particularly at least about 70% by weight, more specifically at least about 80% by weight. To. High amylose starch may be preferred.

(a) Modified starch may be pregelatinized. Pregelatinization and techniques for achieving pregelatinization are known in the art and are disclosed, for example, in US Pat. Nos. 4,456702, 5037929, 5131953 and 5149799. See also Chapter XXII, "Production and Use of Pregelatinized Starch," Starch: Chemistry and Technology, Volume III-Industrial Aspects, R. L. Whistler and E. F. Paschall, Editors, Academic Press, New York 1967. The term "pregelatinization" is intended to mean swollen starch particles in which their birefringence and / or Maltese cross is lost during polarization. Such pregelatinized starch derivatives are substantially soluble in cold water without cooking. In this regard, "soluble" does not necessarily mean the formation of a true molecular solution, but may also mean a colloidal dispersion. In one embodiment, the starch is completely pregelatinized.

The pregelatinized modified starch can be easily and rapidly solubilized even in cold water.

Pregelatinization can be achieved by methods including, but not limited to, drum drying, extrusion and spray drying. In one embodiment, an extrusion method is used to simultaneously cook and dry the starch (see, eg, US Pat. No. 3,137592). This method utilizes the physical treatment of the starch / water mixture under high temperature and pressure resulting in gelatinization of starch, followed by expansion after exiting the nozzle due to rapid evaporation of water.

In one embodiment, pregelatinization is completed to obtain good solubility and remove undissolved particles that can result in an unpleasant grainy feel in the composition.

In one embodiment, the starch has mostly intact starch granules. Aqueous dispersions of pre-gelatinized starch derivatives, which have a largely intact granular structure, are typically more than aqueous dispersions of non-granular starch, which may have a slightly grainy feel. Has a uniform and smooth texture. In the case of pregelatinized starch, which has a granular structure as it is, the natural internal structure of hydrogen bonds is destroyed, but the outer shape or morphology is maintained.

(a) Modified starch may be crosslinked. Cross-linking of starch chains can be achieved with a suitable cross-linking agent, i.e., a bifunctional compound. In one embodiment, the cross-linking method used is a phosphorylation reaction in which starch is reacted with phosphorus oxychloride, phosphorus pentoxide and / or sodium trimetaphosphate. The two starch chains are cross-linked by anionic PO groups. The anionic property of the cross-linking site aids in the emulsion stabilizing action of starch used according to the present invention. In another embodiment, the cross-linking method is with a C ₄ to C ₁₈ alkane or alkene dicarboxylic acid, including but not limited to C ₄ to C ₈ alkane dicarboxylic acids, exemplified by adipic acid. The alkane or alkene dicarboxylic acid connects the two starch chains via an ester bond. It can be in the form of a straight chain or a branched chain. Derivatives can be obtained, for example, by reacting starch with a mixed anhydride of dicarboxylic acid and acetic acid. In one embodiment, less than 0.1% by weight of cross-linking agent is used based on dried starch. In another embodiment 0.06 to 0.1% by weight of cross-linking agent is used based on dried starch.

(a) It is preferable that the modified starch is hydrophobic. (a) It is more preferable that the surface of the modified starch is hydrophobic.

The process of making starch hydrophobic is by grafting hydrophobic functional groups such as C _1-6 acyl (acetyl), C _1-6 hydroxyalkyl (hydroxyethyl or hydroxypropyl), carboxymethyl or octenyl succinic acid groups. Can be carried out.

The alkyl moiety of the functional group may have 1-6 carbon atoms, preferably 2-5 carbon atoms, more preferably 3 or 4 carbon atoms.

(a) The modified starch is preferably hydroxyalkyl modified starch.

The position of the hydroxyl group attached to the starch backbone via an alkyl group such as 2 to 6 carbon atoms in the alkyl group is not important and can be from the alpha position to the omega position. In one preferred embodiment, the degree of substitution of hydroxyalkylation is from about 0.08 to 0.3. The degree of substitution is the average number of substituted OH groups in the starch molecule per unit of anhydrous glucose. Hydroxyalkylation of starch can be achieved by reacting natural starch with an alkylene oxide having an appropriate number of carbon atoms, which is not limited to hydroxy by reacting starch with propylene oxide. Includes propylation. Hydroxyalkyl modified starch may also contain multiple hydroxyl groups per alkyl group.

The hydroxyalkyl modified starch can be selected from the group consisting of hydroxyethyl starch, hydroxypropyl starch, hydroxyethyl phosphate phosphate, hydroxypropyl phosphate phosphate, and mixtures thereof.

The method for preparing hydroxyalkyl modified starch can be carried out in any order. However, those skilled in the art will appreciate the benefits of a particular order. For example, hydroxypropylation is believed to occur when starch is cross-linked, typically prior to cross-linking with phosphorus oxychloride, because the typical hydroxypropylation process has been achieved. This is because it is thought that a part of the bridge will be destroyed.

Examples of hydroxyalkyl modified starches preferably used in the present invention include:
Hydroxypropyl Phosphate Starch (pregelatinized corn starch), marketed by Akzo Nobel as Structure ZEA and XL, as well as
Processed (hydroxypropylated, pregelatinized, high amylose) corn starch marketed as AMAZE by Akzo Nobel.

The amount of (a) modified starch in the composition according to the present invention is 0.01% by mass or more, preferably 0.1% by mass or more, more preferably 0.5% by mass or more, still more preferably 1 with respect to the total mass of the composition. It may be mass% or more.

On the other hand, the amount of (a) modified starch in the composition according to the present invention is 15% by mass or less, preferably 10% by mass or less, more preferably 5% by mass or less, based on the total mass of the composition. More preferably, it may be 3% by mass or less.

The amount of (a) modified starch in the composition according to the present invention is 0.01% by mass to 15% by mass, preferably 0.1 to 10% by mass, more preferably 0.5% by mass to 5% by mass, based on the total mass of the composition. %, More preferably in the range of 1% by mass to 3% by mass.

(C ₁₃ to C ₁₅ fatty acids)
The composition according to the invention (b) contains at least one C ₁₃ -C ₁₅ fatty acid. A single type of C ₁₃ -C ₁₅ fatty acid or two or more different types of C ₁₃ -C ₁₅ fatty acid can be used in combination.

(b) C ₁₃ to C ₁₅ It is preferable that the fatty acids are saturated. Saturated C ₁₃ to C ₁₅ fatty acids can be selected from the group consisting of tridecylic acid (tridecylic acid), myristic acid (tetradecylic acid) and pentadecylic acid (pentadecylic acid).

(b) C ₁₃ to C ₁₅ It is possible that the fatty acids are unsaturated. Unsaturated C ₁₃ to C ₁₅ fatty acids can be selected from the group consisting of tridecenoic acid, myristoleic acid (tetradecenoic acid) and pentadecenoic acid.

(b) It is more preferable that the C ₁₃ to C ₁₅ fatty acids are myristic acid.

The amount of (b) C ₁₃ to C ₁₅ fatty acids in the composition according to the present invention is 1% by mass or more, preferably 2% by mass or more, more preferably 3% by mass or more, based on the total mass of the composition. More preferably, it may be 4% by mass or more.

On the other hand, the amount of (b) C ₁₃ to C ₁₅ fatty acids in the composition according to the present invention is 20% by mass or less, preferably 15% by mass or less, more preferably 10% by mass, based on the total mass of the composition. % Or less, and even more preferably 8% by mass or less.

The amount of (b) C ₁₃ to C ₁₅ fatty acids in the composition according to the present invention is 1% by mass to 20% by mass, preferably 2% by mass to 15% by mass, more preferably 2% by mass, based on the total mass of the composition. It may be in the range of 3% by mass to 10% by mass, and more preferably 4% by mass to 8% by mass.

(b) C ₁₃ to C ₁₅ Amount of fatty acid (mass) / (a) Amount (mass) of modified starch The mass ratio is 1.0 or more, preferably 2.0 or more, more preferably 3.0 or more, and even more preferably 4.0 or more. May be.

(a) Modified starch and (b) C ₁₃ to C ₁₅ fatty acids can form a complex.

(Clay)
The composition according to the invention (c) comprises at least one clay. A single type of clay may be used, or two or more different types of clay may be used in combination.

The term "clay" refers to a naturally occurring substance that is composed primarily of fine minerals, is generally plastic at the appropriate moisture content, and cures when dried or calcined. Clays usually contain phyllosilicates, but clays may also contain other substances that impart plasticity and cure when dried or fired. The associated phase in the clay may include substances and organics that do not impart plasticity. The general definition is that of the Penguin Dictionary of Science, that is, "finely divided rock materials whose constituent minerals are mainly various silicates of magnesium or aluminum". Clays are kaolinite (typically defined as [Si ₄ ] Al ₄ O ₁₀ (OH) 8.nH ₂ O (n = 0 or 4)), illite (typically Mx [Si _6.8 ). Al _1.2 ] Al ₃ Fe. ₀₂₅ Mg. ₇₅ O ₂₀ (OH) ₄ ), vermiculite (typically defined as M _x [Si ₇ Al] AlFe. ₀₅ Mg _0.5 O ₂₀ (OH) ₄ ) Smectite (typically defined as M _x [Si ₈ ] Al _3.2 Fe _0.2 Mg _0.6 O ₂₀ (OH) ₄ ), chlorite (typically (Al (OH) _2.55 )) ₄ [Si _6.8 AlO _1.2 ] Al _3.4 Mg _0.6 ) ₂₀ (OH) ₄ ), and phyllosilicate minerals or talc (typically defined as Mg ₃ Si ₄ O ₁₀ (OH) ₂ ). )including.

Another definition often used by chemists is "a naturally occurring deposit or sedimentary rock composed of one or more minerals and subcompounds, the whole of which is usually hydrated. Rich in aluminum silicate, iron or magnesium, hydrated alumina, or iron oxide, mainly particles of colloidal size or near colloidal size, usually exhibiting plasticity when sufficiently ground and moistened. (See Kirk-Othmer, Encyclopaedia of Chemical Technology, Vol. 5, p. 544, 2nd Edition, John Wiley and Sons, Inc., New York, NY, 1964.). An example of clay is given in the book "Clay mineralogy", S. Caillere, S. Henin, M. Rautureau, 2nd Edition, 1982, Masson. Clays may be of natural or synthetic origin.

Hydrophilic clays include smectites such as saponite, hectorite, montmorillonite, bentonite and byderite. Hydrophilic clay includes synthetic hecterite (also called laponite), eg Laporte Laponite XLG, Laponite RD, Laponite RDS (these products are sodium silicate and magnesium silicate, especially sodium, lithium and magnesium). ), Bentonite, eg, products sold under the name Bentone® HC Rheox, magnesium silicate and aluminum products, eg, ultra Veegum®, Veegum® by Vanderbilt Company. ) HS, hydrated products sold as Veegum® DGT, or synthetic forms sold by companies under the name Micro-Cel® C, in particular calcium silicate.

Fuller soil is mainly composed of hydrated aluminum silicate, which contains metal ions such as magnesium, sodium and calcium in their structures. Montmorillonite is the major clay mineral in Fuller soil, but it may contain other minerals such as kaolinite, attapargite and parigolskite among other components.

Lipophilic clay means clay that swells in a lipophilic medium, and this clay swells to form a colloidal dispersion. The lipophilic clay was processed with processed clay such as processed magnesium silicate (Bentone gel VS38 manufactured by Rheox) and hectorite processed with ammonium chloride fatty acids C ₁₀ to C ₂₂ , for example, ammonium chloride distearyldimethylammonium. Hectorite (CTFA name: disteargimonium hectorite), sold by Rheox under the name "Bentone 38 CE" or by ELEMENTIS under the name Bentone® 38 V.

The origin of such clays can be natural or synthetic mineral clays such as hectorite, bentonite, and quaternized derivatives thereof, eg, these are minerals, quaternary ammonium compounds such as stearalconium bentonite. , Hectorite, quaternized hectorite such as quattanium-18 hectorite, carbonates such as propylene carbonate, benton and the like.

Non-limiting examples of clays that can be used in the present invention are Fuller soil, Pinatsubo volcanic ash mud in the Philippines, Aleppo clay in Syria, Tiga island volcano mud in Malaysia, Nyachan mud in Vietnam, White Kaolinite in South Korea, South Korea. Yellow clay, Choiju volcanic clay from South Korea, Kwanturin mud from Taiwan, Five Dalian pond volcanic mud from China, Black mud from Yunchen salt lake in China, Mineral mud from the head village of China, Khao Lin, Wheat stone from China, Japan Beppu Onsen Fango, Japanese Kucha, Japanese Tanakura Clay, Russian Cambrian Blue Clay, Icelandic Blue Lagoon Mud, Ukrainian Saki Lake Mud, Czech Republic Carlo Vivary Marsh Mud, Hungary Heavys Georgicon Marsh Mud, Alpine Marsh Mud in Austria, Badville Snack Mud in Germany, Bavarian Mineral Salt Mountain Mud in Germany, Freiburg Volcano Ash in Germany, Santorini Mud in Greece, Marmenor Mud in Spain, Iskia Volcano Mud in Italy, Euganay Hot Mud in Italy, Yellow in France Clay-Elite, French Green Clay-Montmorillonite, US Callistoga Mud, US Sacred Clay and Omarite, US Redmond Clay, Canadian Arctic Mineral Mud, Mexican Tulum Maya Clay, Canadian Ice Clay, Brazilian Amazon white clay, Elchiland volcanic clay in Argentina, healing clay in Africa, and olive green clay in Australia.

(c) Clays are preferably selected from the group consisting of hectorite, kaolin, talc, and mixtures thereof.

The amount of (c) clay in the composition according to the present invention may be 1% by mass or more, preferably 2% by mass or more, and more preferably 3% by mass or more with respect to the total mass of the composition.

On the other hand, the amount of (c) clay in the composition according to the present invention is 40% by mass or less, preferably 35% by mass or less, more preferably 30% by mass or less, based on the total mass of the composition. May be good.

The amount of (c) clay in the composition according to the present invention is 1% by mass to 40% by mass, preferably 2% by mass to 35% by mass, and more preferably 3% by mass to 30% by mass, based on the total mass of the composition. It may be in the range of% by mass.

(c) Clay is a complex formed by (a) modified starch and (b) C ₁₃ to C ₁₅ fatty acids, preferably (a) modified starch and (b) C ₁₃ to C ₁₅ fatty acids. It may be coated with a composite preferably formed of hydrophobic modified starch and myristic acid.

(Amphoteric surfactant)
The composition according to the invention comprises (d) at least one amphoteric surfactant. Two or more amphoteric surfactants may be used. Therefore, a single type of surfactant or a combination of different types of amphoteric surfactants can be used.

Amphoteric or zwitterionic surfactants can be, for example (unlimited enumeration), amine derivatives such as aliphatic secondary or tertiary amines, and optionally quaternized amine derivatives. Aliphatic groups are straight or branched chains containing 8 to 22 carbon atoms and containing at least one water solubilizing anionic group (eg, carboxylate, sulfonate, sulfate, phosphate or phosphonate).

The amphoteric surfactant can preferably be selected from the group consisting of betaine and amidoamine carboxylated derivatives.

The amphoteric tenside is preferably selected from betaine-type surfactants.

Betaine-type amphoteric surfactants are preferably alkyl betaine, alkylamide alkyl betaine, sulfobetaine, alkylsulfobetaine, phosphobetaine, alkylphosphobetaine and alkylamide alkylsulfobetaine, specifically (C ₈ to C ₂₄ ). ) Alkyl betaine, (C ₈ to C ₂₄ ) Alkylamide (C ₁ to C ₈ ) Alkyl betaine, Sulfobetaine, (C ₁ to C ₈ ) Alkyl sulfobetaine, Phosphobetaine, (C ₁ to C ₈ ) Alkyl phosphobetaine And (C ₈ to C ₂₄ ) alkyl amides (C ₁ to C ₈ ) selected from the group consisting of alkyl sulfobetaines. In one embodiment, the betaine-type amphoteric surfactants are (C ₈ to C ₂₄ ) alkyl betaine, (C ₈ to C ₂₄ ) alkyl amides (C ₁ to C ₈ ) alkyl betaine, sulfobetaine, (C ₁ to). C ₈ ) Selected from alkyl sulfobetaines and phosphobetaines.

Non-limiting examples that can be mentioned are CTFA International Cosmetic Ingredient Dictionary & Handbook, 15th Edition, 2014, alone or as a mixture, cocobetaine, lauryl betaine, cetyl betaine, coco / oleamide propyl betaine, Classified by the names of cocamidopropyl betaine, palmitamidpropyl betaine, stearamidpropyl betaine, cocamidoethyl betaine, cocamidopropyl hydroxysultaine, oleamidepropyl hydroxysultaine, cocohydroxysultaine, laurylhydroxysultaine and cocos sultane. There are compounds that have been.

The betaine-type amphoteric surfactant (betaine) is preferably alkyl betaine, alkyl sulfobetaine and alkylamide alkyl betaine, particularly cocobetaine, sulfopropyl betaine and cocamidopropyl betaine.

Among the amidoamine carboxylated derivatives can be mentioned in US Pat. Nos. 2528378 and 2781354, CTFA Dictionary, 3rd Edition, 1982 (disclosure is incorporated herein by reference). Products sold under the name Miranol, classified by the names Amhocarboxyglycinate and Amhocarboxypropionate, each having the following structure:
R ₁ -CONHCH ₂ CH ₂ -N + (R ₂ ) (R ₃ ) (CH ₂ ^COO- ) M ⁺ X- ⁽ B1)
[During the ceremony,
R ₁ represents the alkyl group, heptyl, nonyl or undecylic group of the acid R ₁ -COOH present in hydrolyzed coconut oil.
R ₂ indicates a β-hydroxyethyl group,
R ₃ indicates a carboxymethyl group,
M ⁺ indicates a cationic ion derived from an alkali metal such as sodium, an ammonium ion, or an ion derived from an organic amine.
X ^- is an organic or inorganic anionic ion such as a halide ion, an acetate ion, a phosphate ion, a nitrate ion, an alkyl (C ₁ to C ₄ ) sulfate ion, an alkyl (C ₁ to C ₄ )-or an alkyl (C). ₁ to C ₄ ) Represents aryl sulphonates, especially methyl sulphate and ethyl sulphate, or M ⁺ and X ^- are absent]
R 1' _- CONHCH ₂ CH ₂ -N (B) (C) (B2)
[During the ceremony,
R _1'is an alkyl group of the acid R 1' _- COOH present in coconut oil or hydrolyzed flaxseed oil, C ₇ , C ₉ , C ₁₁ or C ₁₃ alkyl group, C ₁₇ alkyl group and its isotype, etc. Alkyl group or unsaturated C ₁₇ group
B stands for -CH ₂ CH ₂ OX',
C represents-(CH ₂ ) _z -Y'(in the equation, z = 1 or 2)
X'indicates each group of -CH ₂ -COOH, -CH ₂ -COOZ', -CH ₂ CH ₂ -COOH, -CH ₂ CH ₂ -COOZ', or a hydrogen atom.
Y'is -COOH, -COOZ', -CH ₂ -CHOH-SO ₃ Z', -CH ₂ -CHOH-SO ₃ H groups, or CH ₂ -CH (OH) -SO ₃ -Z' groups. Shows,
In these formulas, Z'represents alkali metal or alkaline earth metal ions, such as sodium ions, and ions derived from organic amines or ammonium ions.]
and
R _a'' -NH-CH (Y'')-(CH ₂ ) _n -C (O) -NH- (CH ₂ ) _n' -N (Rd) (Re) (B'2)
[During the ceremony,
Y'' is -C (O) OH, -C (O) OZ'', -CH ₂ -CH (OH) -SO ₃ H or -CH ₂ -CH (OH) -SO ₃ -Z''
(In the formula, Z'' indicates a cationic ion derived from an alkali metal or an alkaline earth metal, for example, a sodium ion, an ion derived from an organic amine, or an ammonium ion).
Show,
Rd and Re indicate a C ₁ to C ₄ alkyl group or a C ₁ to C ₄ hydroxyalkyl group.
R _a'' indicates an alkyl or alkenyl group of C ₁₀ to C ₃₀ from the acid.
n and n'independently indicate an integer of 1 to 3]

Amphoteric surfactants having formulas B1 and B2 are (C ₈ to C ₂₄ ) alkyl anhomonoacetates, (C ₈ to C ₂₄ ) alkyl amphodiacetates, (C ₈ to C ₂₄ ) alkyl anhomonopropionates and It is preferably selected from (C ₈ to C ₂₄ ) alkyl amphoteric propionates.

These compounds were found in the CTFA Dictionary, 5th Edition, 1993, with disodium cocoamphodiacetic acid, disodium lauroamphodiacetic acid, disodium capriluanphoniacetic acid, dissodium capilloamphoniacetate, dissodium cocoamphodipropionate, lauroamphopropionic acid. It is classified by the names of disodium, disodium caprylamphodipropionic acid, lauroamphodipropionic acid and cocoamphodipropionic acid.

An example is cocoamphosiacetate sold by Rhodia Chimie under the trade name Miranol® C2M concentrate.

Among the compounds of formula (B'2) is diethylaminopropyl cocoa spartamide sodium (CTFA), which is commercially available under the name CHIMEXANE HB by CHIMEX.

The amphoteric tenside can be selected from N-acylamino acids such as N-alkylaminoacetate and disodium cocoamphodiacetate, as well as amine oxides such as stearamine oxide and lauramine oxide.

It is also preferred that the amphoteric surfactant is selected from amine oxides such as stearamine oxides and lauramine oxides.

Even if the amount of (d) amphoteric surfactant in the composition according to the present invention is 1% by mass or more, preferably 2% by mass or more, more preferably 3% by mass or more, based on the total mass of the composition. good.

On the other hand, the amount of (d) amphoteric surfactant in the composition according to the present invention is 20% by mass or less, preferably 15% by mass or less, more preferably 10% by mass or less, based on the total mass of the composition. May be.

The amount of (d) amphoteric surfactant in the composition according to the present invention is 1% by mass to 20% by mass, preferably 2% by mass to 15% by mass, and more preferably 3% by mass with respect to the total mass of the composition. It may be in the range of% to 10% by mass.

According to the present invention, the mass ratio of (d) the amount of amphoteric tenside / (b) the amount of C ₁₃ to C ₁₅ fatty acids is 0.5 or more, preferably 0.6 or more, and more preferably 0.7 or more.

In some cases, the mass ratio of (d) the amount of amphoteric tenside / (b) the amount of C ₁₃ to C ₁₅ fatty acids is 10 or less, more preferably 5 or less, and more preferably 3 or less.

(d) Since the amphoteric tenside has a large number of cationic moieties, (b) 50% by mass or more (preferably 60% by mass) with respect to the mass of the C ₁₃ to C ₁₅ fatty acids (having a monovalent anionic moiety). % Or more, more preferably 70% by weight or more) may be sufficient to use (d) the amphoteric surfactant.

(water)
The composition according to the present invention may further contain (e) water.

(e) Water can form carriers for the components (a)-(d) in the composition according to the present invention.

(e) The amount of water may be 30% by mass or more, preferably 35% by mass or more, and more preferably 40% by mass or more with respect to the total mass of the composition.

(e) The amount of water may be 70% by mass or less, preferably 65% by mass or less, and more preferably 60% by mass or less, based on the total mass of the composition.

(e) The amount of water may be 30% by mass to 70% by mass, preferably 35% by mass to 65% by mass, and more preferably 40% by mass to 60% by mass with respect to the total mass of the composition. ..

(pH)
The pH of the composition according to the present invention can be adjusted to a desired value by using an acidifying agent or a basicizing agent usually used in cosmetics.

The composition according to the present invention may be acidic. For example, the pH of the composition according to the invention may be less than 7.0, more preferably less than 6.5, even more preferably less than 6.0.

Alternatively, the composition according to the present invention may be basic. For example, the pH of the composition according to the invention may be greater than 7.0, more preferably greater than 7.5, even more preferably greater than 8.0.

Examples of acidifying agents are mineral and organic acids such as hydrochloric acid, orthoric acid, sulfuric acid, carboxylic acids such as acetic acid, tartaric acid, citric acid and lactic acid, and sulfonic acid.

Examples of basicizing agents include ammonium hydroxide, alkali metal carbonates, alkanolamines such as mono-, di- and triethanolamines, as well as derivatives thereof, alkali metal hydroxides. , For example sodium hydroxide or potassium hydroxide, and the following formula:

(During the ceremony,
W represents an alkylene such as propylene optionally substituted with a hydroxyl group or a C ₁ to C ₄ alkyl group, and R _a , R _b , R _c and R _d are independently hydrogen atoms, alkyl groups or R d. Shows C ₁ to C ₄ hydroxyalkyl groups, which can be exemplified by 1,3-propanediamines and their derivatives).
It is a compound of.

The acidifying agent or the basicizing agent may be used in an amount of 20% by mass or less, preferably 15% by mass or less, more preferably 10% by mass or less, based on the total mass of the composition.

The acidifying agent or the basicizing agent may be used in an amount of 0.001% by mass or more, preferably 0.01% by mass or more, more preferably 0.1% by mass or more, based on the total mass of the composition.

The acidifying agent or basicizing agent is in the range of 0.001% by mass to 20% by mass, preferably 0.01% by mass to 15% by mass, and more preferably 0.1% by mass to 10% by mass, based on the total mass of the composition. May be used in quantity.

(Additional optional ingredients)
The compositions according to the invention may also contain any other, optional or additional component.

Other optional ingredients include anionic, cationic, nonionic or amphoteric polymers, fillers, pigments, inorganic or organic UV shields, peptides and derivatives thereof, protein hydrolysates, swelling agents and penetrants, hair removal. You can choose from the group consisting of effective agonists, anti-mold agents, suspending agents, metal ion blockers, opalescent agents, dyes, vitamins or provitamins, fragrances, preservatives, stabilizers, and mixtures thereof.

The compositions according to the invention may contain organic solvents that are acceptable as one or several cosmetics, which may include alcohols, especially monohydric alcohols such as ethyl alcohol, isopropyl alcohol, benzyl alcohol and phenylethyl alcohol; Dires such as ethylene glycol, propylene glycol and butylene glycol; other polyols such as glycerol, sugars and β; and ethers such as ethylene glycol monomethyl, monoethyl and monobutyl ether, propylene glycol monomethyl, monoethyl and monobutyl ether, and butylene glycol monomethyl. , Monoethyl and monobutyl ether.

The organic solvent may be present at a concentration of 0.01% by mass to 25% by mass, preferably 0.1% by mass to 20% by mass, and more preferably 1% by mass to 15% by mass, based on the total mass of the composition.

[form]
The composition according to the invention is preferably in liquid form at 25 ° C. and atmospheric pressure (760 mmHg).

The composition according to the present invention may be in any form such as a solution, a dispersion, a gel and a paste.

The composition according to the present invention may be a cosmetic composition. Therefore, the cosmetic composition according to the present invention may be intended for application to keratin substances. The keratin substance, as used herein, means a substance containing keratin as a main component, and examples thereof include skin, scalp, nails, lips, and hair. Therefore, it is preferred that the cosmetic composition according to the invention be used for keratin substances, more specifically for cosmetic methods for the skin.

The composition according to the present invention may preferably be a rinse-off composition. The rinse-off composition can be removed from keratinous substances such as skin, preferably with water.

The composition according to the present invention may preferably be a cleansing composition. The cleansing composition can remove sebum and / or make-up on keratin substances such as skin from keratin substances.

The composition according to the present invention may be more preferably a rinse-off cleansing composition. The rinse-off cleansing composition can remove sebum and / or make-up on keratinous substances such as skin and can be removed from the keratinous substances, preferably with water.

The composition according to the present invention can be prepared by mixing the essential components described above and the optional components by a conventional method.

[Method]
The present invention also relates to a cosmetic method for a keratin substance such as skin, which comprises the step of applying the composition according to the present invention to the keratin substance.

It is preferred that the cosmetological method according to the invention further comprises the step of rinsing the composition according to the invention applied to the keratin substance from the keratin substance.

After the composition according to the present invention is applied to the keratin substance, it can be left on the keratin substance for a certain period of time such as several minutes.

The cosmetological method, as used herein, means a non-therapeutic cosmetological method for cleansing a keratin substance such as skin, more preferably for cleansing sebum and / or make-up on the keratin substance.

[use]
The present invention also
(a) With at least one modified starch,
(b) At least one C ₁₃ to C ₁₅ fatty acid and
(d) In combination with at least one amphoteric surfactant
The mass ratio of (d) the amount of amphoteric tenside / (b) the amount of C ₁₃ to C ₁₅ fatty acids is 0.5 or more, preferably 0.6 or more, more preferably 0.7 or more.
To increase the adhesion of (c) at least one clay on keratinous substances such as skin,
Also related to use.
In other words, the combination of the components (a), (b) and (d) can enhance the adhesion of the component (c) on the keratin substance such as skin.

The above description of the components (a)-(d) for the composition according to the invention can also be applied to the above components (a)-(d) for use according to the invention.

The modified starch and (b) C ₁₃ to C ₁₅ fatty acids can form a complex, preferably (c) clay is coated with the complex.

The hydrophobicity of (c) clay is a complex formed by (a) modified starch and (b) C ₁₃ to C ₁₅ fatty acids, preferably (a) modified starch and (b) C ₁₃ to C ₁₅ fatty acids. It can be fortified by the body, more preferably by a complex formed of hydrophobic modified starch and myristic acid. Thus, (c) clay can adhere more to keratinous substances such as skin due to (c) hydrophobic-hydrophobic interactions between clay and keratinous substances. This can result in (c) increased clay deposits on the keratinous material.

Furthermore, surprisingly, the additional use of (d) amphoteric surfactants can further enhance (c) clay adhesion on keratinous substances such as skin.

Without being bound by theory, (d) the cationic portion of the amphoteric surfactant may be due to (b) C ₁₃ -C ₁₅ fatty acids, (c) processed starch on clay and (b). The negative charge of the possible complex with the C ₁₃ to C ₁₅ fatty acids can be reduced, and therefore the clay having the possible complex with the reduced negative charge (c) such as skin that originally has the negative charge. It is convinced that it can be absorbed fairly easily on keratin substances.

Since the use according to the present invention can increase the amount of clay adhered to the keratin substance, the use according to the present invention can bring the keratin substance an effect such as an immediate and sustained oil content control effect. Also, the increased amount of clay adhered to keratinous substances such as skin can provide a smooth feel over a long period of time.

The above combinations can be used in compositions, preferably in cosmetic compositions, more preferably in cleansing cosmetic compositions, which include optional ingredients such as water and at least one. Additional optional components such as those described above, specifically at least one acidifying agent and / or at least one basicizing agent.

The composition may be acidic. For example, the pH of the composition may be less than 7.0, more preferably less than 6.5, even more preferably less than 6.0. Alternatively, the composition may be basic. For example, the pH of the composition may be greater than 7.0, more preferably greater than 7.5, even more preferably greater than 8.0.

The use according to the invention can be rephrased as a method of (c) increasing or strengthening the adhesion of at least one clay on a keratin substance such as skin, which method, together with (c) clay, (a). ) Including the step of applying a combination of processed starch, (b) C ₁₃ to C ₁₅ fatty acid and (d) amphoteric surfactant to a keratin substance, (d) amount of amphoteric surfactant / (b) C ₁₃ to The mass ratio of the amount of C ₁₅ fatty acid is 0.5 or more, preferably 0.6 or more, and more preferably 0.7 or more. This method can increase the amount of (c) clay adhered to the keratinous material.

The present invention will be described in more detail by way of examples. However, these examples should not be construed as limiting the scope of the invention. The following examples are presented as non-limiting examples in the field of the invention.

(Example 1 and Comparative Example 1)
[Preparation]
Each of the compositions according to Example 1 and Comparative Example 1 was prepared by mixing the components shown in Table 1. All figures for the amount of ingredients are based on the "% by weight" of the active material.

[evaluation]
The efficacy of gloss control provided by each of the compositions according to Example 1 and Comparative Example 1 was evaluated by a Lightcam (Newtone Technologies, France) instrumentation methodology in 19 healthy female subjects with oily skin.

The conditions for measurement by the instrument were 21 +/- 1 ° C and 45 +/- 5% RH.

500 mg each of the compositions according to Example 1 and Comparative Example 1 was applied to half of the subject's face. Immediately after application (T0) and 4 hours after application (T4h), forehead gloss was measured on half of the face applied and half of the face not applied. The average gloss control score was determined by averaging the difference in gloss between the applied half facial gloss and the unapplied half facial gloss.

The results are shown in Figure 1.

As shown in FIG. 1 (A), the composition according to Example 1 can bring about a better shine control effect than the composition according to Comparative Example 1 even immediately after its application. As such, the composition according to Example 1 can provide an advantageous, immediate illuminance control effect.

As shown in FIG. 1 (B), the composition according to Example 1 can bring about a better shine control effect than the composition according to Comparative Example 1 even after 4 hours of its application. As such, the composition according to Example 1 can provide an advantageous, sustained shine control effect.

(Examples 1 to 4 and Comparative Examples 2 and 3)
[Preparation]
Each of the compositions according to Examples 1 to 4 and Comparative Examples 2 and 3 was prepared by mixing the components shown in Table 2. All figures for the amount of ingredients are based on the "% by weight" of the active material.

[evaluation]
(Sensory evaluation)
The compositions according to Examples 1 to 4 and Comparative Examples 2 and 3 were evaluated by three monitors in terms of adhesion sensation and oil control persistence. Each of the compositions according to Examples 1 to 4 and Comparative Examples 2 and 3 was applied by the monitor itself on the face of the monitor. Each composition was rinsed off.

The monitor evaluated the sensation of adhesion by scoring according to the following criteria as the level of clay remaining on the skin surface after rinsing. The average score is shown in Table 2.
5: Very good
4: Good
3: Normal
2: Bad
1: Extremely bad

In addition, the monitor has the following evaluation criteria for the sustainability of oil control as a level to maintain a greasy, non-greasy / non-greasy / non-sticky feel after 4 hours of rinsing. Scored and evaluated according to. The average score is shown in Table 2.
5: Very good
4: Good
3: Normal
2: Bad
1: Extremely bad

From Table 2, the compositions according to Examples 1 to 4 containing (c) clay and a combination of (a) modified starch, (b) C ₁₃ to C ₁₅ fatty acids and (d) amphoteric tenside are sensation of adhesion. And it is clear that the best results could be obtained in terms of oil control sustainability.

On the other hand, (d) the composition according to Comparative Example 2 containing a nonionic surfactant (coco-glucoside) instead of the amphoteric surfactant was found in Examples 1 to 1 in terms of adhesion sensation and oil content sustainability control. It gave inferior results compared to the composition according to 4.

Further, (d) the composition according to Comparative Example 3 containing an anionic surfactant (sodium laureth sulfate) instead of the amphoteric surfactant is the composition according to Examples 1 to 4 in terms of adhesion sensation and oil content control sustainability. It gave inferior results compared to the ones.

Claims (15)

(a) With at least one modified starch,
(b) At least one C ₁₃ to C ₁₅ fatty acid and
(c) At least one type of clay,
(d) A composition comprising at least one amphoteric surfactant.
The mass ratio of (d) the amount of amphoteric tenside / (b) the amount of C ₁₃ to C ₁₅ fatty acids is 0.5 or more, preferably 0.6 or more, more preferably 0.7 or more.
Composition. The modified starch (a) is hydrophobic, preferably hydroxyalkyl modified starch, more preferably composed of hydroxyethyl starch, hydroxypropyl starch, hydroxylethyl ethyl phosphate starch, hydroxypropyl starch phosphate, and mixtures thereof. The composition according to claim 1, selected from the group. The amount of the (a) modified starch in the composition is 0.01% by mass to 15% by mass, preferably 0.1% by mass to 10% by mass, and more preferably 0.5% by mass to 5 with respect to the total mass of the composition. The composition according to claim 1 or 2, which is by mass%. The composition according to any one of claims 1 to 3, wherein the (b) C ₁₃ to C ₁₅ fatty acid is myristic acid. The amount of the (b) C ₁₃ to C ₁₅ fatty acids in the composition is 1% by mass to 20% by mass, preferably 2% by mass to 15% by mass, more preferably 3 with respect to the total mass of the composition. The composition according to any one of claims 1 to 4, which is 10% by mass by mass. The composition according to any one of claims 1 to 5, wherein the clay (c) is selected from the group consisting of hectorite, kaolin, talc, and a mixture thereof. The amount of the (c) clay in the composition is 1% by mass to 40% by mass, preferably 2% by mass to 35% by mass, and more preferably 3% by mass to 30% by mass with respect to the total mass of the composition. The composition according to any one of claims 1 to 6, which is%. The composition according to any one of claims 1 to 7, wherein the (a) modified starch and the (b) C ₁₃ to C ₁₅ fatty acids form a complex. The composition according to any one of claims 1 to 8, wherein the (d) amphoteric surfactant is selected from betaine, an amine oxide, and a mixture thereof. The amount of the (d) amphoteric surfactant in the composition is 1% by mass to 20% by mass, preferably 2% by mass to 15% by mass, and more preferably 3% by mass with respect to the total mass of the composition. The composition according to any one of claims 1 to 9, which is ~ 10% by mass. (e) The composition according to any one of claims 1 to 10, further comprising water. 11. The composition of claim 11, wherein the pH is greater than 7.0, preferably greater than 7.5, more preferably greater than 8.0. The composition according to any one of claims 1 to 12, which is a cosmetic composition, preferably a rinse-off composition, and more preferably a rinse-off cleansing composition. A cosmetological method for a keratin substance such as skin, which comprises a step of applying the composition according to any one of claims 1 to 13 to the keratin substance. (a) With at least one modified starch,
(b) At least one C ₁₃ to C ₁₅ fatty acid and
(d) In combination with at least one amphoteric surfactant
The mass ratio of (d) the amount of amphoteric tenside / (b) the amount of C ₁₃ to C ₁₅ fatty acids is 0.5 or more, preferably 0.6 or more, more preferably 0.7 or more.
To increase the adhesion of (c) at least one clay on keratinous substances such as skin,
use.

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