WO2024135543A1

WO2024135543A1 - Composition comprising modified starch, c13-c15 fatty acid, and powdery organic salt

Info

Publication number: WO2024135543A1
Application number: PCT/JP2023/044951
Authority: WO
Inventors: Nodoka MITAKE; Koji Endo
Original assignee: L'oreal
Priority date: 2022-12-21
Filing date: 2023-12-08
Publication date: 2024-06-27

Abstract

The present invention relates to a composition, comprising (a) at least one modified starch; (b) at least one C_13-C₁₅ fatty acid; (c) at least one powdery organic salt, and (d) water. The composition according to the present invention can provide exceptional ease of foaming and leads to an improved amount of foam.

Description

DESCRIPTION

TITLE OF INVENTION

COMPOSITION COMPRISING MODIFIED STARCH, C13.C15 FATTY ACID, AND POWDERY ORGANIC SALT

TECHNICAL FIELD

The present invention relates to a composition comprising a modified starch, C13-C15 fatty acid, and powdery organic salt, as well as a use of the composition.

BACKGROUND ART

Good foaming properties are very important for cosmetic foaming cleanser products. The amount of the foam directly relates to the perceived cleaning efficiency of the composition for the consumers. Consumers also tend to prefer cosmetic foaming cleanser products that lather easily.

To date, some prior art has been reported cosmetic foaming cleanser products. For example, JP-A-2020- 180062 discloses a composition comprising (a) at least one modified starch, (b) at least one C13-C15 fatty acid, and (c) at least one clay, which is stable, and can be rinsed off from the skin and can leave an enhanced deposition of clay on the skin after rinsing off the composition from the skin.

Also, JP-A-2022-95240 discloses a composition comprising (a) at least one modified starch;

(b) at least one C13-C15 acid; (c) at least one clay; and (d) at least one amphoteric surfactant, which can be rinsed off from a keratin substance such as skin and can leave an enhanced deposition of clay on the keratin substance after rinsing off the composition from the skin.

However, there is still a need to enhance the foaming properties of cosmetic rinse-off compositions.

DISCLOSURE OF INVENTION

An objective of the present invention is to provide a composition comprising clay with improved foaming properties in terms of foam volume as well as an ease of foaming.

The above objective can be achieved by a composition, comprising:

(a) at least one modified starch;

(b) at least one C13-C15 acid;

(c) at least one powdery organic salt, and

(d) water.

The (a) modified starch may be hydrophobic, preferably hydroxyalkyl-modified starch, and more preferably selected from the group consisting of hydroxyethyl starch, hydroxypropyl starch, hydroxyethyl starch phosphate, hydroxypropyl starch phosphate, and a mixture thereof. The amount of the (a) modified starch in the composition according to the present invention may be from 0.01% to 15% by weight, preferably from 0.1% to 10% by weight, and more preferably from 0.5% to 5% by weight, relative to the total weight of the composition.

The (b) C13-C15 fatty acid may be myristic acid.

The amount of the (b) C13-C15 fatty acid in the composition according to the present invention may be from 1% to 20% by weight, preferably from 2% to 15% by weight, and more preferably from 3% to 10% by weight, relative to the total weight of the composition.

The (c) powdery organic salt may be water-insoluble.

The(c) powdery organic salt may selected from fatty acid salts, salts of modified polysaccharide, and a combination thereof.

The (c) powdery organic salt may be powdery organometallic salts.

The amount of the (c) powdery organic salt in the composition may be from 0.1% to 10% by weight, preferably from 0.3% to 5% by weight, and more preferably from 0.5% to 5% by weight, relative to the total weight of the composition.

The (a) modified starch and the (b) C13-C15 fatty acid may form a complex.

The composition according to the present invention may further comprise at least one clay.

The composition according to the present invention may further comprise at least one amphoteric surfactant.

The composition according to the present invention may further comprise at least one fatty acid other than the (b) C13-C15 fatty acid, preferably comprise a combination of at least one fatty acid containing from 6 to 12 carbon atoms and at least one fatty acid containing from 16 to 30 carbon atoms.

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

The present invention also relates to a cosmetic process for a keratin substance, such as skin, comprising the step of: applying the composition according to the present invention onto the keratin substance.

BEST MODE FOR CARRYING OUT THE INVENTION

After diligent research, the inventors have discovered that it is possible to provide a composition with improved foaming properties in terms of ease of foaming and foam volume, and thus completed the invention.

The composition according to the present invention comprises a combination of (a) at least modified starch, (b) at least one C13-C15 fatty acid, (c) at least one powdery organic salt, and (d) water. Hereafter, the present invention will be described in a detailed manner.

[Composition]

One of the aspects of the present invention is a composition, comprising:

(a) at least one modified starch;

(b) at least one C13-C15 fatty acid;

(c) at least one powdery organic salt; and

(d) water.

Each of the ingredients will be described in a more detailed manner below.

(Modified Starch)

The composition according to the present 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 starches may be used in combination.

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

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

The (a) modified starch is based on a base starch. Base starch, as used herein, is intended to include all starches derived from any native source, any of which may be suitable for use herein. A native starch, as used herein, is one as it is found in nature. Also suitable are starches derived from a plant obtained by standard breeding techniques including crossbreeding, translocation, inversion, transformation or any other method of gene or chromosome engineering to include variations thereof. In addition, starches derived from a plant grown from artificial mutations and variations of the above generic starches, which may be produced by known standard methods of mutation breeding, are also suitable herein.

Typical sources for the starches are cereals, tubers, roots, legumes and fruits. The native source can be waxy varieties of com (maize), pea, potato, sweet potato, banana, barley, wheat, rice, oat, sago, amaranth, tapioca (cassava), arrowroot, canna, and sorghum, as well as low and high amylose varieties thereof. As used herein, the term "low amylose" starch is intended to include a starch containing no more than about 10%, particularly no more than 5%, and more particularly no more than 2% amylose by weight. As used herein, the term "high amylose" starch is intended to include a starch containing at least about 50%, particularly at least about 70%, and more particularly at least about 80% amylose by weight. High amylose starches may be preferable.

The (a) modified starch may be pre-gelatinized. Pre-gelatinization and techniques for achieving pre-gelatinization are known in the art and disclosed for example in U.S. Pat. Nos. 4,465,702, 5,037,929, 5,131,953, and 5,149,799. Also see, Chapter XXII- "Production and Use of Pregelatinized Starch", Starch: Chemistry and Technology, Vol. Ill-Industrial Aspects, R. L. Whistler and E. F. Paschall, Editors, Academic Press, New York 1967. The term pregelatinized is intended to mean swollen starch particles, which have lost their birefringence and/or maltese crosses in polarized light. Such pre-gelatinized starch derivatives are substantially soluble in cold water without cooking. In this context "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 pre-gelatinized.

The pre-gelatinized modified starch is easily and quickly soluble even in cold water.

Pre-gelatinization may be achieved by methods which include, without limitation, drum drying, extrusion and spray drying. In one embodiment, extrusion is used for the simultaneous cooking and drying of the starch (see for example U.S. Pat. No. 3,137,592). This process makes use of the physical processing of a starch/water mixture at elevated temperatures and pressures which brings about the gelatinization of the starch, followed by expansion after leaving the nozzle with sudden evaporation of the water.

In one embodiment, pre-gelatinization is completed to provide good solubility and eliminate undissolved particles, which may give rise to an unpleasant, sandy feel in the composition.

In one embodiment, the starch has a majority of intact starch granules. Aqueous dispersions of pre-gelatinized starch derivatives having a largely intact granular structure typically have a more uniform smooth texture than aqueous dispersions of starches without a granular structure, which may have a slightly gritty feel. In the case of pre-gelatinized starches with an intact granular structure, the native internal structure of the hydrogen bonds is destroyed, but the external shape or form is maintained.

The (a) modified starch may be crosslinked. Crosslinking of the starch chains can be achieved by suitable crosslinking agents, that is, bifunctional compounds. In one embodiment, the crosslinking method used is phosphorylation, in which the starch is reacted with phosphorous oxychloride, phosphorous pentoxide, and/or sodium trimetaphosphate. Two starch chains are crosslinked by an anionic P-0 group. The anionic character of the crosslinking sites assists the emulsion-stabilizing action of the starch to be used according to the present invention. In another embodiment, the crosslinking method is by means of C4-C18 alkane or alkene dicarboxylic acids which include without limitation C4-C8 alkane dicarboxylic acids, exemplified by adipic acid. The alkane or alkene dicarboxylic acid links two starch chains via ester bonds. It can be in straight or branched chain form. The derivatives may be obtained, for example, by reacting starch with the mixed anhydrides of dicarboxylic acid and acetic acid. In one embodiment, less than 0.1 weight percent based on the dry starch crosslinking agent is used. In another embodiment, about 0.06 to 0.1 weight percent based on the dry starch crosslinking agent is used.

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

The modification to make starch hydrophobic may be performed by grafting hydrophobic functional groups such as Ci-e acyl (acetyl), Ci-6 hydroxyalkyl (hydroxyethyl or hydroxypropyl), carboxymethyl or octenylsuccinic group.

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

It is preferable that the (a) modified starch be hydroxylalkyl-modified starch. The position of the hydroxyl group, which is bound to the starch backbone via an alkyl group such as 2 to 6 carbon atoms in the alkyl group, is not critical and can be in the alpha to omega position. In one suitable embodiment, the degree of substitution of the hydroxyalkylation is about 0.08 to 0.3. The degree of substitution is the average number of substituted OH groups of the starch molecule per anhydroglucose unit. The hydroxyalkylation of a starch can be brought about by reacting a native starch with alkylene oxides with the appropriate number of carbon atoms, including without limitation hydroxypropylation by reaction of the starch with propylene oxide. The hydroxyalkyl-modified starch can also contain more than one hydroxyl group per alkyl group.

The hydroxyalkyl-modified starch may be selected from the group consisting of hydroxyethyl starch, hydroxypropyl starch, hydroxyethyl starch phosphate, hydroxypropyl starch phosphate, and a mixture thereof.

The processes for preparing the hydroxyalkyl-modified starch may be conducted in any order. However, one skilled in the art would understand the advantages of certain orders. For example, hydroxypropylation would typically be conducted before crosslinking, if the starch is crosslinked, with phosphorous oxychloride as the typical hydroxypropylation process would destroy some of the crosslinking achieved.

Examples of the hydroxyalkyl-modified starch preferably used in the present invention may include the following:

Hydroxypropyl starch phosphate (pre-gelatinized, com starch) marketed by Akzo Nobel as Structure ZEA and XL; and

Corn starch modified (hydroxypropylated, pre-gelatinized, high amylose) marketed by Nouryon, as AMAZE.

The amount of the (a) modified starch in the composition according to the present invention may be 0.01% by weight or more, preferably 0.1% by weight or more, more preferably 0.5% by weight or more, and even more preferably 1% by weight or more, relative to the total weight of the composition.

On the other hand, the amount of the (a) modified starch in the composition according to the present invention may be 15% by weight or less, preferably 10% by weight or less, more preferably 5% by weight or less, and even more preferably 3% by weight or less, relative to the total weight of the composition.

The amount of the (a) modified starch in the composition according to the present invention may range from 0.01% to 15% by weight, preferably from 0.1% to 10% by weight, more preferably from 0.5% to 5% by weight, and even more preferably from 1% to 3% by weight, relative to the total weight of the composition.

In the context of the present specification, any combinations of the upper limit values and the lower limit values above can be available to represent the preferred range of the amount.

(C13-C15 Fatty Acid)

The composition according to the present invention comprises (b) at least one C13-C15 fatty acid. A single type of C13-C15 fatty acid, or two or more different types of C13-C15 fatty acids may be used in combination. It is preferable that the (b) C13-C15 fatty acid is saturated. The saturated C13-C15 fatty acid can be selected from the group consisting of tridecylic acid (tridecanoic acid), myristic acid (tetradecanoic acid) and pentadecylic acid (pentadecanoic acid).

It is possible that the (b) C13-C15 fatty acid is unsaturated. The unsaturated C13-C15 fatty acid can be selected from the group consisting of tridecenoic acid, myristoleic acid (tetradecenoic acid) and pentadecenoic acid.

It is more preferable that the (b) C13-C15 fatty acid be myristic acid.

The amount of the (b) C13-C15 fatty acid in the composition according to the present invention may be 1% by weight or more, preferably 2% by weight or more, more preferably 3% by weight or more, and even more preferably 4% by weight or more, relative to the total weight of the composition.

On the other hand, the amount of the (b) C13-C15 fatty acid in the composition according to the present invention may be 20% by weight or less, preferably 15% by weight or less, more preferably 10% by weight or less, and even more preferably 8% by weight or less, relative to the total weight of the composition.

The amount of the (b) C13-C15 fatty acid in the composition according to the present invention may range from 1% to 20% by weight, preferably from 2% to 15% by weight, more preferably from 3% to 10% by weight, and even more preferably from 4% to 8% by weight, relative to the total weight of the composition.

The weight ratio of the amount (weight) of the (b) C13-C15 fatty acid/the amount (weight) of the (a) modified starch may be 1.0 or more, preferably 2.0 or more, more preferably 3.0 or more, and even more preferably 4.0 or more.

The (a) modified starch and the (b) C13-C15 fatty acid may form a complex.

(Powdery Organic Salt)

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

The (c) powdery organic salt may work to enhance the foaming properties of the composition according to the present invention.

Without being bound by theory, it is believed that the (c) powdery organic salt can disturb water-based compositions network, which makes the composition easier to merge with the water when the composition contacts with water. It is believed that such a function of the powdery organic salt may result in providing the composition with better foaming properties, in particular an ease of foaming.

The term “powder” used herein means should be understood as particles of any shape, which are insoluble in the medium of the composition, in particular water. The (c) powdery organic salt may be of any shape, platelet-shaped, spherical or oblong, irrespective of the crystallographic form (for example lamellar, cubic, hexagonal, orthorhombic, etc.).

The average particle size of the (c) powdery organic salt is not limited. For example, the average particle size of the (c) powdery organic salt may be 50 pm or less, preferably 20 pm or less, and more preferably 10 pm or less. The average particle size of the powdery organic salt may be 0.01 pm or more, and preferably 0.1 pm or more. The term “average particle size” used herein represents a number-average size mean diameter which is given by the statistical particle size distribution to half of the population, referred to as D50. For example, the number-average size mean diameter can be measured by a laser diffraction particle size distribution analyzer, such as Mastersizer 2000 by Malvern Corp.

The (c) powdery organic salt may be water-insoluble.

The term “water-insoluble” here indicates materials which are soluble in water at a concentration of less than 0.1% by weight, in particular less than 0.01% by weight, relative to the total weight of the water at room temperature (25 °C) and atmospheric pressure (10⁵ Pa).

A cation moiety of the powdery organic salt may be selected from metallic cations and organic cations. Preferably, the cation moiety of the powdery organic salt is selected from metallic cations. Thus, the (c) powdery organic salt is preferably a powdery organometallic salt.

The (c) powdery organic salt may be selected from organometallic salts with monovalent metal ion and organometallic salts with divalent or higher metal ion. The organometallic salts with monovalent metal ion may include sodium salts, potassium salts, cesium salts, and lithium salts. The organometallic salts with divalent or higher metal ion may include calcium salts, magnesium salts, cobalt salts, nickel salts, copper salts, iron salts, manganese salts, strontium salts, molybdenum salts, barium salts, zinc salts, and aluminium salts.

In one preferred embodiment of the present invention, the powdery organometallic salt may be selected from organometallic salts with divalent or higher metal ion, and more preferably selected from calcium salts, magnesium salts, and aluminium salts.

The (c) powdery organic salt may also be selected from organic salts with monovalent organic ion, such ammonium salts, sulfonium salts, and phosphonium salts.

The powdery organic salt may be selected from fatty acid salts, salts of modified polysaccharide, and a combination thereof.

The fatty acid salt(s) may comprise a long hydrophobic hydrocarbon chain, which is linear or branched and saturated and unsaturated, for example, having 6 to 30 carbon atoms, as a carboxylate anion (a fatty acyl); and a cation, as depicted in the following formula:

wherein R is a substituted or unsubstituted, liner or branched hydrocarbon chain of 6 to 30 carbon atoms, M⁺ is a cation, and n is an integer representing the number of fatty acyls that interact with the cation, and also represents the charge number of the cation (e.g., 1 , 2, 3, etc.). The fatty acid salts that are usable in some of any of the embodiments of the present invention may contain 1 to 3 fatty acyl chains, and preferably two chains. Thus, the fatty acid salt can be a salt of a monovalent, a divalent ion, or a trivalent ion, and preferably a divalent ion.

Each fatty acyl chain, independently, may be linear or branched, saturated and unsaturated, preferably linear and saturated, and/or may comprise 6 to 30 carbon atoms, preferably 8 to 24 carbon atoms, and more preferably 12 to 22 carbon atoms in length.

The cation can be metal ions, such as monovalent metal ion, divalent metal ion, and trivalent metal ion. The monovalent metal ion can be selected from Na⁺, K⁺, Cs⁺, and Li⁺. The divalent metal ion can be selected from Mg²⁺, Ca²⁺, Fe (II), Co²⁺, Ni²⁺, Cu²⁺, Mn²⁺, Sr²⁺, MO²⁺, Ba²⁺, and Zn²⁺. The trivalent metal ion can be selected from Fe(III) and Al³⁺.

Preferably, the metal ion is selected from divalent metal ions, and more preferably Mg²⁺ and

Ca²' .

The cation can be organic cations, which can be selected from ammonium cation, sulfonium cation, and phosphonium cation.

In one preferred embodiment, the fatty acid salt comprises metal ions, which is referred to as "fatty acid metal salts".

The fatty acid of the fatty acid salts may be selected from linear or branched, saturated and unsaturated fatty acids, and preferably linear and saturated fatty acids, which may comprise 6 to 30 carbon atoms, preferably 8 to 24 carbon atoms, and more preferably 12 to 22 carbon atoms in length. As the example of fatty acids, mention can be made of stearic acid, arachidic acid, palmitoleic acid, oleic acid, linoleic acid, linolaidic acid, arachidonic acid, myristoleic acid and erucic acid. Other fatty acids are also contemplated.

In some preferred embodiments, the fatty acid salt is selected from fatty acid metal salts.

Exemplary fatty acid metal salts include, but are not limited to, magnesium stearate, magnesium oleate, calcium stearate, calcium linoleate, sodium stearate, magnesium arachidnoate, magnesium palmitate, magnesium linoleate, calcium arachidonoate, calcium myristoleate, sodium linoleate, calcium linoleate, sodium stearate, potassium stearate, sodium laurate, sodium myristate, sodium palmitate, potassium laurate, potassium myristate, potassium palmitate, calcium laurate, calcium myristate, calcium palmitate, zinc laurate, zinc myristate, zinc palmitate, zinc stearate, magnesium laurate, and magnesium myristate.

In a preferred embodiment, the fatty acid metal salt is selected from calcium stearate, magnesium stearate, and a combination thereof

The salt of modified polysaccharide may be salts of water-insoluble modified polysaccharides. In one embodiment, the polysaccharide has been modified so as to be water- soluble. Thus, it is preferable that the modified polysaccharide be hydrophobic. It is more preferable that the surface of the modified polysaccharide be hydrophobic.

Preferably, polysaccharide of the salt of modified polysaccharide is starch. Thus, the salt of modified polysaccharide is preferably selected from salts of modified starch.

The modified starch is based on a base starch. The starch intended to include all starches derived from any native source, any of which may be suitable for use herein. A native starch, as used herein, is one as it is found in nature. Also suitable are starches derived from a plant obtained by standard breeding techniques including crossbreeding, translocation, inversion, transformation or any other method of gene or chromosome engineering to include variations thereof. In addition, starches derived from a plant grown from artificial mutations and variations of the above generic starches, which may be produced by known standard methods of mutation breeding, are also suitable herein.

Typical sources for the starches are cereals, tubers, roots, legumes and fruits. The native source can be waxy varieties of com (maize), pea, potato, sweet potato, banana, barley, wheat, rice, oat, sago, amaranth, tapioca (cassava), arrowroot, canna, and sorghum, as well as low and high amylose varieties thereof. High amylose starches may be preferable.

The modified starch may be pre-gelatinized. In one embodiment, the starch is completely pre-gelatinized. The pre-gelatinized modified starch is easily and quickly soluble even in cold water. In one embodiment, pre-gelatinization is completed to provide good solubility and eliminate undissolved particles, which may give rise to an unpleasant, sandy feel in the composition.

The modified starch may be crosslinked. Crosslinking of the starch chains can be achieved by suitable crosslinking agents, that is, bifunctional compounds. In one embodiment, the crosslinking method used is phosphorylation, in which the starch is reacted with phosphorous oxychloride, phosphorous pentoxide, and/or sodium trimetaphosphate. Two starch chains are crosslinked by an anionic P-0 group. The anionic character of the crosslinking sites assists the emulsion-stabilizing action of the starch to be used according to the present invention. In another embodiment, the crosslinking method is by means of C4-C18 alkane or alkene dicarboxylic acids which include without limitation C4-C8 alkane dicarboxylic acids, exemplified by adipic acid. The alkane or alkene dicarboxylic acid links two starch chains via ester bonds. It can be in straight or branched chain form. The derivatives may be obtained, for example, by reacting starch with the mixed anhydrides of dicarboxylic acid and acetic acid. In one embodiment, less than 0.1 weight percent based on the dry starch crosslinking agent is used. In another embodiment, about 0.06 to 0.1 weight percent based on the dry starch crosslinking agent is used.

It is preferable that the modified starch be hydrophobic. It is more preferable that the surface of the modified starch be hydrophobic.

The modification to make starch hydrophobic may be performed by grafting hydrophobic functional groups such as C1-6 acyl (acetyl), C1-6 hydroxyalkyl (hydroxyethyl or hydroxypropyl), phosphate, alkyl phosphate, hydroxyalkyl phosphate, carboxymethyl or octenylsuccinic group.

In some preferred embodiments of the present invention, the modification is an esterification. In these embodiments, the modified starch may be selected from starches esterified with Ci-6 acyl (acetyl), phosphate, alkyl phosphate, hydroxyalkyl phosphate, or octenylsuccinic group, and more preferably the starch is modified with octenylsuccinic group.

The salt of modified polysaccharide may be metal salts of water-insoluble modified polysaccharides or organic salts of water-insoluble modified polysaccharides. In one embodiment, the salt of modified polysaccharide is metal salts of water-insoluble modified polysaccharides. It is more preferable that the metal salts of water-insoluble modified polysaccharides are the metal salts of modified starch.

In some further preferred embodiments, the metal salt of modified starch is selected from metal salts of starch octenylsuccinate, such as aluminium starch octenylsuccinate and sodium starch octenylsuccinate, and more preferably aluminium starch octenylsuccinate.

The amount of the (c) powdery organometallic salt in the composition according to the present invention may be 0.1% by weight or more, preferably 0.3% by weight or more, and more preferably 0.5% by weight or more, relative to the total weight of the composition.

On the other hand, the amount of the (c) powdery organometallic salt in the composition according to the present invention may be 10% by weight or less, preferably 5% by weight or less, and more preferably 3% by weight or less, relative to the total weight of the composition.

The amount of the (c) powdery organometallic salt in the composition according to the present invention may range from 0.1% to 10% by weight, preferably from 0.3% to 5% by weight, and more preferably from 0.5% to 5% by weight, relative to the total weight of the composition.

(Water)

The composition according to the present invention comprises (d) water.

The (d) water can form a carrier of the ingredients (a) to (c) in the composition according to the present invention.

The amount of the (d) water may be 20% by weight or more, preferably 30 by weight or more, and more preferably 35by weight or more, relative to the total weight of the composition.

The amount of the (d) water may be 70% by weight or less, preferably 65% by weight or less, and more preferably 60% by weight or less, relative to the total weight of the composition.

The amount of the (d) water may be from 20 to 70% by weight, preferably from 30 to 65% by weight, and more preferably from 35 to 60% by weight, relative to the total weight of the composition.

(Other Ingredients)

- Clay

The composition according to the present invention may comprise at least one clay. A single type of clay may be used, or two or more different types of clays may be used in combination. The term "clay" refers to a naturally occurring material composed primarily of fine-grained minerals, which is generally plastic at an appropriate water content and will harden 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 in the Penguin Dictionary of Science, namely "finely divided rock materials whose component minerals are various silicates, mainly of magnesium or aluminium". Clay comprises Kaolinite (typically defined as [Si4]A140io(OH)s.nH20 (n=0 or 4)), Illite (typically defined as Mx[Si6.8Ali,2]A13Fe.025Mg.75O20 (OH)₄), Vermiculite (typically defined as .MxfSi7AlJAlFe.05Mg0.5O20 (OH)₄), Smectite (typically defined as MxfSi8jAl3.2Fe0.2Mg0.6O20 (OH)₄, Chlorite (typically defined as (Al(OH)2.55)4[Si6.8A10i.2}A13.4Mgo.6)2o(OH)4), and Phyllosilicate minerals or talc (typically defined as Mg3Si40io(OH)2).

Another definition, frequently used by chemists is "a naturally occurring sediment or sedimentary rock composed of one or more minerals and accessory compounds, the whole usually being rich in hydrated aluminum silicate, iron or magnesium, hydrated alumina, or iron oxide, predominating in particles of colloidal or near-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, N.Y. 1964). Example of clays are 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 clay includes smectites such as saponites, hectorites, montmorillonites, bentonites, beidellite. Hydrophilic clay includes synthetic hectorites (also called laponites) such as the products sold by the company under the name Laporte Laponite XLG, Laponite RD, Laponite RDS (these products are sodium silicates and magnesium silicates in particular sodium, lithium and magnesium) bentonites such as the product sold under the name Bentone® HC Rheox, magnesium silicates and aluminum products such as hydrated products sold by Vanderbilt Company as ultra Veegum®, Veegum® HS, Veegum® DGT, or calcium silicates, particularly the synthetic form sold by the company under the name Micro-Cel® C.

Fuller's earth consists chiefly of hydrated aluminum silicates that contain metal ions such as magnesium, sodium, and calcium within their structure. Montmorillonite is the principal clay mineral in fuller's earth, but it may contain other minerals such as kaolinite, attapulgite, and palygorskite among other components.

Lipophilic clay means clay swellable in a lipophilic medium, the clay swells and forms a colloidal dispersion. Lipophilic clays include modified clays such as the modified magnesium silicate (Bentone gel VS38 from Rheox) hectorites modified with an ammonium chloride fatty acid C10 to C22, such as hectorite modified with ammonium chloride distearyldimethylammonium (CTFA name: Disteardimonium hectorite) sold under the name "Bentone 38 CE" by Rheox or Bentone® 38V by ELEMENTIS.

The origin of such clay can be natural or synthetic mineral clay such as hectorite, bentonite, and quatemized derivatives thereof, for example which are obtained by reacting the minerals with a quaternary ammonium compound, such as stearalkonium bentonite, hectorites, quatemized hectorites such as Quatemium-18 hectorite, carbonates such as propylene carbonate, bentones, and the like.

The non-limiting of examples of clay which can be used in the present invention are Fuller's earth, Pinatubo volcanic ash mud from Philippines, Aleppo clay from Syria, Pulau tiga volcano mud from Malasiya, Nha Trang mud from Vietnam, White Kaolinite from Korea, Yellow Loess from Korea, Jeju volcanic clay from Korea, Guanziling mud form Taiwan, Wudalianchi volcanic mud from China, Black mud of Yuncheng salt lake from China, mineral mud from Tantou village in China, China clay (Kaolin), Maifan stone from China, Beppu onsen Fango from Japan, Kucha from Japan, Tanakura clay from Japan, Cambrian blue clay from Russia, Blue Lagoon mud from Iceland, Saki lake mud from Ukraine, Karlovy Vary moor mud from Czech Republic, Heviz Georgikon moor mud from Hungry, Alpine moor mud from Austria, Bad Wilsnack mud from Germany, Bavarian mineral slat mountain mud from Germany, Freiburg volcanic ash from Germany, Santorini mud from Greece, Mar Menor mud from Spian, Ischian volcanic mud from Italy, Euganean thermal mud from Italy, Yellow clay-Illite from France, French Green Clay— Montmorrillonite, Calistoga mud from USA, Sacred clay and ormalite from USA, Redmond clay from USA, Arctic mineral mud from Canada, Tulum Mayan clay from Mexico, Glacial clay from Canada, Amazonian white clay from Brazil, El Chillante volcanic thermal mud from Argentina, African healing clay, and Australian olive green clay.

It is preferable that the clay be selected from the group consisting of hectorite, kaolin, talc, and a mixture thereof.

When the composition comprises the clay, it can be coated with the (a) modified starch and the (b) C13-C15 fatty acid. In particular, when the composition comprises the clay, it can be coated with a complex of the (a) modified starch and the (b) C13-C15 fatty acid.

When the composition comprises the clay, the hydrophobicity of the clay can be enhanced by the (a) modified starch and the (b) C13-C15 fatty acid, preferably a complex formed by the (a) modified starch and the (b) C13-C15 fatty acid, and more preferably a complex formed by hydrophobic modified starch and myristic acid. Therefore, the clay can deposit more on a keratin substance such as skin, due to hydrophobic-hydrophobic interaction between the clay and the keratin substance. This can result in the increase in the amount of the deposition of the clay on the keratin substance.

The amount of the clay in the composition according to the present invention may be 0.5% by weight or more, preferably 1% by weight or more, and more preferably 2% by weight or more, relative to the total weight of the composition.

On the other hand, the amount of the clay in the composition according to the present invention may be 30% by weight or less, preferably 20% by weight or less, and more preferably 10% by weight or less, relative to the total weight of the composition.

The amount of the clay in the composition according to the present invention may range from 0.5% to 30% by weight, preferably from 1% to 20% by weight, and more preferably from 2% to 10% by weight, relative to the total weight of the composition.

- Amphoteric Surfactant The composition according to the present invention may comprise (d) at least one amphoteric surfactant. Two or more amphoteric surfactants may be used. Thus, a single type of surfactant or a combination of different types of amphoteric surfactants may be used.

The amphoteric or zwitterionic surfactants can be, for example (non-limiting list), amine derivatives such as aliphatic secondary or tertiary amine, and optionally quatemized amine derivatives, in which the aliphatic radical is a linear or branched chain including 8 to 22 carbon atoms and containing at least one water-solubilizing anionic group (for example, carboxylate, sulphonate, sulphate, phosphate or phosphonate).

The amphoteric surfactant may preferably be selected from the group consisting of betaines and amidoaminecarboxylated derivatives.

It is preferable that the amphoteric surfactant be selected from betaine-type surfactants.

The betaine-type amphoteric surfactant is preferably selected from the group consisting of alkylbetaines, alkylamidoalkylbetaines, sulfobetaines, alkylsulfobetaines, phosphobetaines, alkylphosphobetaines, and alkylamidoalkylsulfobetaines, in particular, (C8-C24)alkylbetaines, (C8-C24)alkylamido(Ci-C8)alkylbetaines, sulfobetaines, (Ci-C8)alkylsulfobetaines, phosphobetaines, (Ci-Cs)alkylphosphobetaines, and (C8-C24)alkylamido(Ci- C8)alkylsulfobetaines. In one embodiment, the amphoteric surfactants of betaine type are chosen from (Cs-C24)alkylbetaines, (C8-C24)alkylamido(Ci-C8)alkylsulfobetaines, sulfobetaines, (Ci-Cs)alkylsulfobetaines and phosphobetaines.

Non-limiting examples that may be mentioned include the compounds classified in the CTFA International Cosmetic Ingredient Dictionary & Handbook, 15th Edition, 2014, under the names cocobetaine, laurylbetaine, cetylbetaine, coco/oleamidopropylbetaine, cocamidopropylbetaine, palmitamidopropylbetaine, stearamidopropylbetaine, cocamidoethylbetaine, cocamidopropylhydroxysultaine, oleamidopropylhydroxysultaine, cocohydroxysultaine, laurylhydroxysultaine, and cocosultaine, alone or as mixtures.

The betaine-type amphoteric surfactant (betaines) is preferably an alkylbetaine an alkylsulfobetaine, and an alkylamidoalkylbetaine, in particular cocobetaine, sulfopropylbetaine, and cocamidopropylbetaine.

Among the amidoaminecarboxylated derivatives, mention may be made of the products sold under the name Miranol, as described in U.S. Pat. Nos. 2,528,378 and 2,781,354 and classified in the CTFA dictionary, 3rd edition, 1982 (the disclosures of which are incorporated herein by reference), under the names Amphocarboxyglycinates and Amphocarboxypropionates, with the respective structures:

RI-CONHCH2CH2-N⁺(R2)(R₃)(CH₂COO-) M⁺ X' (Bl) in which:

Ri denotes an alkyl radical of an acid Ri-COOH present in hydrolysed coconut oil, a heptyl, nonyl or undecyl radical,

R2 denotes a beta-hydroxyethyl group,

R₃ denotes a carboxymethyl group,

M⁺ denotes a cationic ion derived from alkaline metals such as sodium; ammonium ion; or an ion derived from an organic amine; X" denotes an organic or inorganic anionic ion such as halides, acetates, phosphates, nitrates, alkyl(Ci-C4)sulfates, alkyl(Ci-C4)- or alkyl(Ci-C4)aryl-sulfonates, particularly methylsulfate and ethylsulfate; or M⁺ and X" are not present;

RI'-CONHCH₂CH₂-N(B)(C) (B2) in which:

Ri' denotes an alkyl radical of an acid Ri'-COOH present in coconut oil or in hydrolysed linseed oil, an alkyl radical, such as a C7, C9, C11 or C13 alkyl radical, a C17 alkyl radical and its iso-form, or an unsaturated C17 radical, B represents -CH₂CH₂OX',

C represents -(CH₂)_Z-Y', with z=l or 2,

X' denotes a -CH₂-COOH group, -CH₂-COOZ’, -CH₂CH₂-COOH, -CH₂CH₂-COOZ’ or a hydrogen atom, and

Y' denotes -COOH, -COOZ’, -CH₂-CHOH-SO₃Z’, -CH₂-CHOH-SO₃H radical or a -CH₂- CH(OH)-SO₃-Z’ radical, wherein Z’ represents an ion of an alkaline or alkaline earth metal such as sodium, an ion derived from an organic amine or an ammonium ion; and

Ra”-NH-CH(Y”)-(CH₂)n-C(O)-NH-(CH₂)_n’-N(Rd)(Re) (B’2) in which:

Y” denotes -C(O)OH, -C(O)OZ”, -CH₂-CH(OH)-SO₃H or -CH₂-CH(OH)-SO₃-Z”, wherein Z” denotes a cationic ion derived from alkaline metal or alkaline-earth metals such as sodium, an ion derived from organic amine or an ammonium ion;

Rd and Re denote a C1-C4 alkyl or C1-C4 hydroxyalkyl radical;

R_a” denotes a Cio-C₃o group alkyl or alkenyl group from an acid, and n and n’ independently denote an integer from 1 to 3.

It is preferable that the amphoteric surfactant with formula Bl and B2 be selected from (Cs- C₂4)-alkyl amphomonoacetates, (Cs-C₂4)alkyl amphodiacetates, (C8-C₂4)alkyl amphomonopropionates, and (C8-C₂4)alkyl amphodipropionates

These compounds are classified in the CTFA dictionary, 5th edition, 1993, under the names Disodium Cocoamphodiacetate, Disodium Lauroamphodiacetate, Disodium Caprylamphodiacetate, Disodium Capryloamphodiacetate, Disodium Cocoamphodipropionate, Disodium Lauroamphopropionate, Disodium Caprylamphodipropionate, Disodium Caprylamphodipropionate, Lauroamphodipropionic acid and Cocoamphodipropionic acid.

By way of example, mention may be made of the cocoamphodiacetate sold under the trade name Miranol® C2M concentrate by the company Rhodia Chimie.

Among compounds of formula (B’2), mention may be made of sodium diethylaminopropyl cocoaspartamide (CTFA) marketed by CHIMEX under the denomination CHIMEXANE HB.

The amphoteric surfactant may be selected from N-acylamino acids such as N-alkyl aminoacetates and disodium cocoamphodi acetate, and amine oxides such as stearamine oxide and lauramine oxide. It is also preferable that the amphoteric surfactant be selected from amine oxides such as stearamine oxide and lauramine oxide.

The amount of the amphoteric surfactant in the composition according to the present invention may be 1% by weight or more, preferably 2% by weight or more, and more preferably 3% by weight or more, relative to the total weight of the composition.

On the other hand, the amount of the amphoteric surfactant in the composition according to the present invention may be 20% by weight or less, preferably 15% by weight or less, and more preferably 10% by weight or less, relative to the total weight of the composition.

The amount of the amphoteric surfactant in the composition according to the present invention may range from 1% to 20% by weight, preferably from 2% to 15% by weight, and more preferably from 3% to 10% by weight, relative to the total weight of the composition.

In one embodiment of the present invention, the weight ratio of the amount of the amphoteric surfactant/the amount of the (b) C13-C15 fatty acid may be 0.5 or more, preferably 0.6 or more, and more preferably 0.7 or more.

It may be preferable that the weight ratio of the amount of the amphoteric surfactant/the amount of the (b) C13-C15 fatty acid may be 10 or less, more preferably 5 or less, and more preferably 3 or less.

- Hydrophilic Organic Solvent

The composition according to the present invention may comprise at least one cosmetically acceptable hydrophilic organic solvent. Two or more hydrophilic organic solvents may be used. Thus, a single type of hydrophilic organic solvent or a combination of different types of hydrophilic organic solvents may be used.

The term “hydrophilic” here means substances having a solubility of at least 1 g/L, preferably at least 10 g/L, and more preferably at least 100 g/L, in water at room temperature (25 °C) and atmospheric pressure (105 Pa). Therefore, the cosmetically acceptable hydrophilic organic solvent is included in the water phase, if present.

The cosmetically acceptable hydrophilic organic solvent(s) may include, for example, substantially linear or branched lower mono-alcohols having from 1 to 8 carbon atoms, such as ethanol, propanol, butanol, isopropanol, and isobutanol; aromatic alcohols, such as benzyl alcohol and phenylethyl alcohol; polyols or polyol ethers, such as propylene glycol, dipropylene glycol, isoprene glycol, butylene glycol, glycerine, propanediol, pentylene glycol, caprylyl glycol, sorbitol, ethylene glycol monomethyl, monoethyl and monobutyl ethers, propylene glycol ethers, propylene glycol monomethylether, diethylene glycol alkyl ethers, such as diethylene glycol monoethylether or monobutylether; polyethylene glycols, such as PEG-4, PEG-6, PEG-8, PEG- 10, and PEG-20, and their derivatives, and a combination thereof.

The amount of the cosmetically acceptable hydrophilic organic solvent(s) in the composition according to the present invention may be from 1% to 40% by weight, preferably from 3% to 30% by weight, and more preferably from 5% to 20% by weight, relative to the total weight of the composition.

- Fatty Acids other than C13-C15 Fatty Acid

The composition according to the present invention may comprises at least one fatty acid other than the (b) C13-C15 fatty acid. Two or more fatty acids other than the (b) C13-C15 fatty acid may be used in combination.

The fatty acid other than the (b) C13-C15 fatty acid may be linear or branched, saturated or unsaturated fatty acids. Preferably, the fatty acid other than the (b) C13-C15 fatty acid is selected from linear fatty acids. Preferably, the fatty acid other than the (b) C13-C15 fatty acid is selected from saturated fatty acids. Thus, the fatty acid other than the (b) C13-C15 fatty acid may be linear and saturated fatty acids

In one embodiment of the present invention, the fatty acid other than the (b) C13-C15 fatty acid may be fatty acids containing from 6 to 12 carbon atoms and in particular from 8 to 12 carbon atoms. In one preferred embodiment, the fatty acid other than the (b) C13-C15 fatty acid may be linear or branched, preferably linear, saturated or unsaturated, preferably saturated, in particular linear and saturated fatty acids containing from 6 to 12 carbon atoms and in particular from 8 to 12 carbon atoms.

The fatty acids containing from 6 to 12 carbon atoms may be selected from caproic acid, capric acid, lauric acid, and combination thereof, and in particular lauric acid.

The amount of the fatty acid(s) containing from 6 to 12 carbon atoms in the composition according to the present invention may be from 1% to 30% by weight, preferably from 3% to 20% by weight, and more preferably from 5% to 10% by weight, relative to the total weight of the composition.

In another embodiment of the present invention, the fatty acid other than the (b) C13-C15 fatty acid may be fatty acids containing from 16 to 30 carbon atoms, for example, from 16 to 24, carbon atoms, from 16 to 22 carbon atoms, or from 16 to 20 carbon atoms. In one preferred embodiment, the fatty acid other than the (b) C13-C15 fatty acid may be linear or branched, preferably linear, saturated or unsaturated, preferably saturated, in particular linear and saturated fatty acids containing from 16 to 30 carbon atoms, for example, from 16 to 24, carbon atoms, from 16 to 22 carbon atoms, or from 16 to 20 carbon atoms.

The fatty acids containing from 16 to 30 carbon atoms may be selected from palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, linolenic acid, isostearic acid, and combination thereof, and more preferably chosen from palmitic acid, stearic acid, and combination thereof.

The amount of the fatty acid(s) containing from 16 to 30 carbon atoms in the composition according to the present invention may be from 0.3% to 15% by weight, preferably from 0.5% to 10% by weight, and more preferably from 1% to 5% by weight, relative to the total weight of the composition.

In some specific embodiments of the present invention, the fatty acid other than the (b) C13.

C15 fatty acid comprises two types of fatty acids, and in particular comprises a combination of the at least one fatty acid containing from 6 to 12 carbon atoms and the at least one fatty acid containing from 16 to 30 carbon atoms. Thus, in one specific embodiment of the present invention the composition comprises at least one of caproic acid, capric acid and lauric acid, and at least one of palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, linolenic acid, and isostearic acid in combination.

The amount of the fatty acid(s) other than the (b) C13-C15 fatty acid in the composition according to the present invention may be from 1% to 30% by weight, preferably from 3% to 20% by weight, and more preferably from 5% to 15% by weight, relative to the total weight of the composition.

- pH Adjuster

The composition according to the present invention may comprises at least one pH adjuster selected from acidifying agents and basifying agents. Two or more pH adjusters may be used in combination.

The pH of the composition according to the present invention may be adjusted to the desired value using acidifying or basifying agents commonly used in cosmetic products.

The composition according to the present invention may be acidic. For example, the pH of the composition according to the present invention may be less than 12.0, more preferably less than 11.0, and even more preferably less than 10.0.

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

Among the acidifying agents, mention may be made, by way of example, of mineral or organic acids such as hydrochloric acid, ortho-phosphoric acid, sulfuric acid, carboxylic acids such as acetic acid, tartaric acid, citric acid, and lactic acid, and sulfonic acids.

Among the basifying agents, mention may be made, by way of example, of ammonium hydroxide, alkali metal carbonates, alkanolamines such as mono-, di- and triethanolamines and also their derivatives, alkali metal hydroxides such as sodium or potassium hydroxide and compounds of the formula below:

wherein

W denotes an alkylene such as propylene optionally substituted by a hydroxyl or a C1-C4 alkyl radical, and R_a, Rb, Rc and Rd independently denote a hydrogen atom, an alkyl radical or a Ci- C4 hydroxyalkyl radical, which may be exemplified by 1,3 -propanediamine and derivatives thereof.

The acidifying or basifying agent may be used in an amount of 20% by weight or less, preferably 15% by weight or less, and more preferably 10% by weight or less, relative to the total weight of the composition. The acidifying or basifying agent may be used in an amount of 0.001% by weight or more, preferably 0.01% by weight or more, and more preferably 0.1% by weight or more, relative to the total weight of the composition.

The acidifying or basifying agent may be used in an amount ranging from 0.001% to 20% by weight, preferably from 0.01% to 15% by weight, and more preferably from 0.1% to 10% by weight, relative to the total weight of the composition.

- Additives

The composition according to the present invention may also include any other optional or additional ingredient(s).

The other optional ingredient(s) may be selected from the group consisting of anionic, cationic, nonionic, or amphoteric polymers, such as acrylates copolymer; cationic, nonionic or anionic surfactants, such as glycol distearate; fillers; pigments; inorganic and organic UV filters; peptides and derivatives thereof; protein hydrolyzates; swelling agents and penetrating agents; agents for combating hair loss; anti-dandruff agents; suspending agents; sequestering agents, such as tetrasodium glutamate diacetate; opacifying agents; dyes; vitamins or provitamins; fragrances; preserving agents, such as phenoxyethanol, stabilizers; and mixtures thereof.

The amount of the other optional ingredient(s) in the composition according to the present invention may be from 0.01% to 30% by weight relative to the total weight of the composition.

[Form]

The form of the composition according to the present invention is not particularly limited, as long as it is water-based, and may take various forms such as a solution, a gel, a lotion, a serum, a suspension, a dispersion, a fluid, a milk, a W/O or O/W emulsion, thickened or not, a paste, a foam, or a cream, and preferably a solution, a dispersion, a gel, and a paste.

The composition according to the present invention may be a cosmetic composition. Thus, the cosmetic composition according to the present invention may be intended for application onto a keratin substance. Keratin substance here means a material containing keratin as a main constituent element, and examples thereof include the skin, nails, lips, and the like. Thus, it is preferable that the cosmetic composition according to the present invention be used for a cosmetic process for the keratin substance, in particular skin.

The composition according to the present invention may preferably be a rinse-off composition. The rinse-off composition can be removed from a keratin substance 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 makeup on a keratin substance such as skin from the keratin substance.

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

The composition according to the present invention can be prepared by mixing the abovedescribed essential and optional ingredients in a conventional manner.

[Process]

The present invention also relates to a cosmetic process for a keratin substrate, such as skin, comprising: applying to the keratin substrate the composition according to the present invention.

It is preferable that the cosmetic process according to the present invention further comprise rinsing off the composition according to the present invention which has been applied onto the keratin substance from the keratin substance.

The cosmetic process here means a non-therapeutic cosmetic method, preferably for cleansing the keratin substance such as skin, and more preferably for cleansing sebum and/or makeup on the keratin substance.

The present invention also relates to a use of the (c) at least one powdery organometallic salt in a composition comprising

(a) at least one modified starch;

(b) at least one C13-C15 fatty acid; and

(d) water, in order to improve foaming properties in terms of foam volume as well as an ease of foaming.

The same explanations given for the composition, the (a) at least one modified starch, (b) at least one C13-C15 fatty acid; (c) at least one powdery organic salt, and (d) water can be applied to those for the process and use according to the present invention unless otherwise mentioned. The composition used in the process and use according to the present invention may include any of the optional ingredients explained above for the composition according to the present invention.

EXAMPLES

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

Examples 1-6 and Comparative Examples 1 and 2

[Preparations]

Each of the cleansing compositions for skin according to Examples 1-6 (Ex. 1-6) and Comparative Examples 1-2 (Comp. Ex. 1-2) was prepared by mixing the ingredients shown in Tables 1 and 2. The numerical values for the amounts of the ingredients are all based on “% by weight” as active materials. The product "com starch modified" was obtained from Nouryon (product name: AMAZE).

[Evaluations]

(Sensory Evaluations)

The compositions according to Examples 1-6 and Comparative Examples 1-2 were evaluated with respect to ease of foaming and foam volume by 3 monitors by themselves.

- Ease of foaming

0.5 mL of each of the compositions according to Examples 1-6 and Comparative Examples 1- 2 and 1 mL of water were placed on the monitors’ hand. Each of the samples was lathered with 10 circular motions. The property of ease of foaming was ranked with 5 grades by examining an amount of the sample left of the hand after the 10 circular motions. Score 5 indicates that the sample was not left on the hand. Score 1 indicates the sample was left on the hand.

- Foam volume

After the evaluation of the ease of foaming above, the properties regarding to foam volume was then evaluated. 1 mL of water was added to the foamed samples on the hand. Each samples was then further lathered with extra 40 circular motions. The foam volume was then evaluated with 5 grades. A higher score indicates that a higher volume of foam was created.

Each of the scores was averaged. The results are shown in Tables 1 and 2 below.

Table 1

Table 2

It is clear from Tables 1 and 2 that the compositions according to Examples 1 -6, which included a combination of ingredients (a) to (d), was able to provide better ease of foaming and greater amount of foam than Comparative Examples 1 and 2 which did not include the (c) powdery organometallic salt.

Example 7

[Preparations]

A cleansing compositions for skin according to Example 7 (Ex. 7) was prepared by mixing the ingredients shown in Table 3. the numerical values for the amounts of the ingredients are all based on “% by weight” as active materials.

[Evaluations]

(Sensory Evaluations)

The following properties were evaluated by 6 monitors by themselves. Each of the evaluated properties was ranked with 5 grades in accordance with the following criteria. - Ease of foaming

The ease of foaming was evaluated by examining the amount of the sample left of the hand after lathering.

5 : It was very easy to foam.

4: It was somewhat easy to foam.

3: Can't say either.

2: It was somewhat difficult to foam.

1 : It was very difficult to foam.

- Foam volume

The foam volume was evaluated by examining the speed of the foam created after the lather.

5: Very good

4: Good

3 : Can't say either

2: Poor

1: Very poor

- Freshness

Freshness sensation was evaluated just after they finished facial wash.

5: Very fresh

4: Somewhat fresh

3: Can't say either

2: Not very fresh

1 : Not fresh at all

- Not tight / dry sensation

After washing a face, it was evaluated if a tight and/or dry sensation was felt.

5: Not tight/dry at all

4: Not very tight/dry

3: Can't say either

2: Somewhat tight/dry

1 : Very tight/dry

- Smoothness

Smooth sensation on the facial skin was evaluated immediately after washing and for one day thereafter.

5: Very smooth

4: Somewhat smooth

3 : Can't say either

2: Not very smooth 1 : Not smooth at all

- Oil control

The oil control properties were examined by observing the appearance of washed face after washing and for one day thereafter.

5: Oily shine look was very well controlled.

4: Oily shine look was somehow controlled.

3: Can't say either.

2: Oily shine look was not very well controlled.

1 : Oily shine look was not controlled at all.

- Non-greasy/sticky feeling to touch

A level of maintaining non-greasy/sticky feeling to touch was evaluated after washing and for one day thereafter.

5 : No greasy/sticky feeling to touch at all

4: Not very greasy/sticky feeling to touch

3 : Can't say either.

2: Somewhat greasy/sticky feeling to touch

1 : Very greasy/sticky feeling to touch

Each of the scores was averaged. The results are shown in Table 3 below.

Table 3

Non-greasy/sticky feeling to touch 4.33

As can be seen from Table 3, the composition according to the present invention can provide better cosmetic sensory properties, such as imparting freshness, a not tight I dry sensation, smoothness, oil control, and non-greasy/sticky feeling to touch with keratinous substance in addition to improved ease of foaming and foam volume.

Claims

1. A composition comprising:

(a) at least one modified starch;

(b) at least one C13-C15 fatty acid;

(c) at least one powdery organic salt, and

(d) water.

2. The composition according to Claim 1, wherein the (a) modified starch is hydrophobic, preferably hydroxyalkyl-modified starch, and more preferably selected from the group consisting of hydroxyethyl starch, hydroxypropyl starch, hydroxyethyl starch phosphate, hydroxypropyl starch phosphate, and a mixture thereof.

3. The composition according to Claim 1 or 2, wherein the amount of the (a) modified starch in the composition is from 0.01% to 15% by weight, preferably from 0.1% to 10% by weight, more preferably from 0.5% to 5% by weight, relative to the total weight of the composition.

4. The composition according to any one of Claims 1 to 3, wherein the (b) C13-C15 fatty acid is myristic acid.

5. The composition according to any one of Claims 1 to 4, wherein the amount of the

(b) C13-C15 fatty acid in the composition is from 1% to 20% by weight, preferably from 2% to 15% by weight, and more preferably from 3% to 10% by weight, relative to the total weight of the composition.

6. The composition according to any one of Claims 1 to 5, wherein the (c) powdery organic salt is water-insoluble.

7. The composition according to any one of Claims 1 to 6, wherein the (c) powdery organic salt is selected from fatty acid salts, salts of modified polysaccharide, and a combination thereof.

8. The composition according to any one of Claims 1 to 7, wherein the (c) powdery organic salt is powdery organometallic salts.

9. The composition according to any one of Claims 1 to 8, wherein the amount of the

(c) powdery organic salt in the composition is from 0.1% to 10% by weight, preferably from 0.3% to 5% by weight, and more preferably from 0.5% to 5% by weight, relative to the total weight of the composition.

10. The composition according to any one of Claims 1 to 9, wherein the (a) modified starch and the (b) C13-C15 fatty acid form a complex.

11. The composition according to any one of Claims 1 to 10, wherein the composition further comprises at least one clay.

12. The composition according to any one of Claims 1 to 11, wherein the composition further comprises at least one amphoteric surfactant.

13. The composition according to any one of Claims 1 to 12, wherein the composition further comprises at least one fatty acid other than the (b) C13-C15 fatty acid, preferably comprise a combination of at least one fatty acid containing from 6 to 12 carbon atoms and at least one fatty acid containing from 16 to 30 carbon atoms.

14. The composition according to any one of Claims 1 to 13, wherein the composition is a cosmetic composition, preferably a rinse-off composition, and more preferably a rinse-off cleansing composition.

15. A cosmetic process for a keratin substance, such as skin, comprising the step of: applying the composition according to any one of Claims 1 to 14 onto the keratin substance.