TWI746564B - Skin cleansing composition - Google Patents

Abstract

It is an object of the present invention to provide a skin cleansing composition containing a cellulose particle, the composition being stable and having good foamability, etc. The present invention provides a skin cleansing composition comprising the following components (A) to (E): (A) 6% by mass or more and 18% by mass or less of a fatty acid or a salt thereof represented by formula (1) as an acid and having a degree of neutralization of from 0.85 to 1.02: R¹-COOX (1) wherein R¹ represents an alkyl group having 11 to 23 carbon atoms, and X represents a hydrogen atom, an alkali metal, ammonium or organic ammonium; (B) 0.15% by mass or more and 2% by mass or less of an alkyl ether sulfate represented by formula (2): R²-O-(CH₂CH₂O)_n-SO₃Y (2) wherein R² represents an alkyl group or alkenyl group having 8 to 22 carbon atoms, n represents an average number of moles of oxyethylene added of from 0.5 to 12, and Y represents a hydrogen atom, an alkali metal, an alkaline-earth metal, a ammonium or organic ammonium; (C) 0.1% by mass or more and 4% by mass or less of an amphoteric surfactant; (D) 0.1% by mass or more and 1.0% by mass or less of an alkyl-modified carboxyvinyl polymer; and (E) 0.1% by mass or more and 10% by mass or less of a cellulose particle.

Description

Skin cleanser composition

The present invention relates to a skin cleanser composition containing particles.

In view of availability, many skin cleansers such as face cleansers and body washes are in liquid or foam form. These skin cleansers contain an anionic surfactant with high cleansing power as the main cleansing agent. In addition, in order to improve the sebum removal efficiency, skin cleansing agents containing scrubbing agents such as polyethylene beads and organic gel particles have also been developed and used (Patent Documents 1 to 3).

(PTL 1) Patent-JP-A-H11-172296

(PTL 2) Patent-JP-A-2005-539097

(PTL 3) Patent-JP-A-2006-348258

The present invention provides a skin cleansing composition comprising the following components (A) to (E): (A) 6 mass% or more and 18 mass% or less as an acid and having 0.85 to 1.02 as an acid The fatty acid or its salt represented by formula (1) of the degree of ^{harmony: R 1} -COOX (1)

Wherein R ¹ represents an alkyl group having 11 to 23 carbon atoms, and X represents a hydrogen atom, alkali metal, ammonium or organic ammonium; (B) 0.15% by mass or more and 2% by mass or less are represented by formula (2) The alkyl ether sulfate: R ² -O-(CH ₂ CH ₂ O) _n -SO ₃ Y (2)

Wherein R ² represents an alkyl or alkenyl group with 8 to 22 carbon atoms, n represents the average number of moles of added oxyethylene groups from 0.5 to 12, and Y represents a hydrogen atom, alkali metal, alkaline earth metal, ammonium Or organic ammonium; (C) 0.1% by mass or more and 4% by mass or less amphoteric surfactant; (D) 0.1% by mass or more and 1.0% by mass or less of alkyl-modified carboxyvinyl polymer ; And (E) 0.1% by mass or more and 10% by mass or less of cellulose particles.

Skin cleansers containing conventional and widely used polyethylene beads are not completely satisfactory in terms of feeling during use, etc., and there is still a need to develop new skin cleansers containing water-insoluble particles. To cope with this situation, the inventors tried to develop a detergent containing cellulose particles as water-insoluble particles.

However, it has been found that when the cellulose particles are incorporated into the detergent together with an anionic surfactant, new problems concerning stability, dispensability, foamability, etc. will arise, such as when transferring from a container after storage. Reduced distributability.

Therefore, the present invention provides a skin cleansing composition containing cellulose particles, which is stable and has good foamability and the like.

The present inventors have extensively studied and found that it is possible to use fatty acid salts and alkyl ether sulfates as anionic surfactants at the same time, and to combine amphoteric surfactants Blended with a specific amount of alkyl-modified carboxyvinyl polymer to obtain excellent dispensability, foamability, rinsability, scrub feeling, and stability after long-term storage when transferred from the container This is a skin cleansing composition containing cellulose particles, thus completing the present invention.

The skin cleansing agent composition of the present invention contains cellulose particles as a scrubbing agent component, produces an excellent scrub feeling, and has good dispensability when transferred from a container, good foamability, and good rinsability , Good stability after long-term storage, and good dispensability when transferred from the container after storage.

The component (A) used in the skin cleansing composition of the present invention is a fatty acid or salt thereof represented by the following formula (1) and having a degree of neutralization of 0.85 to 1.02: R ¹ -COOX (1)

Wherein R ¹ represents an alkyl group having 11 to 23 carbon atoms, and X represents a hydrogen atom, alkali metal, ammonium or organic ammonium.

In formula (1), R ^{1 is} preferably a linear alkyl group having 11 to 16 carbon atoms. Examples of X include alkali metals such as sodium and potassium; ammonium; alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine; and cations derived from basic amino acids such as arginine and lysine.

More specific examples of component (A) include lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, divinic acid, lignoceric acid, and salts thereof, and lauric acid, myristic acid, palmitic acid, Its salt is preferred. Among them, potassium salts of lauric acid, myristic acid, and palmitic acid are more preferable. These fatty acids or their salts can be used alone or in combination of two or more.

From the standpoint of improving cleanliness, expandability, foamability, rinsability, scrub feeling, dispensability when transferred from the container, and storage stability, fat The degree of neutralization of the acid or its salt (1) is 0.85 to 1.02, preferably 0.85 to 0.97, and still more preferably 0.87 to 0.94. Here, the degree of neutralization is represented by the ratio of the molar number of the added base to the molar number of the carboxyl group of the monomer having a carboxyl group.

In other words, when the degree of neutralization of the skin cleansing composition of the present invention is less than 1.0, it is regarded as containing fatty acids and their salts as the compound represented by formula (1), and when the degree of neutralization is greater than 1.0, it is regarded as Only fatty acid salts are present. In other words, the component (A) is considered to be present in the skin cleansing composition as a fatty acid and a fatty acid salt or as a fatty acid salt.

From the viewpoint of improving skin cleanliness, foamability, rinsability and storage stability, the content of the acid component (A) in the skin cleanser composition is 6% by mass or more and 18% by mass % Or less, preferably 8% by mass or more, more preferably 10% by mass or more, still more preferably 12% by mass or more, and preferably 17% by mass or less, and more preferably 16% by mass or less. The specific range of the content of the component (A) is preferably 8 to 17% by mass, more preferably 10 to 17% by mass, and still more preferably 12 to 16% by mass.

The content of the fatty acid or its salt in the skin cleansing agent composition other than the acid component (A) is preferably 2% by mass or less, more preferably 1% by mass or less, and still more preferably 0.1% by mass or less, And more preferably 0% by mass.

The component (B) used in the present invention is an alkyl ether sulfate represented by the following formula (2): R ² -O-(CH ₂ CH ₂ O) _n -SO ₃ Y (2)

Wherein R ² represents an alkyl or alkenyl group with 8 to 22 carbon atoms, n represents the average number of moles of added oxyethylene groups from 0.5 to 12, and Y represents a hydrogen atom, alkali metal, alkaline earth metal, ammonium (NH ₄ ⁺ ) or organic ammonium.

In formula (2), R ^{2 is} preferably a linear or branched alkyl or alkenyl group having 12 to 18 carbon atoms, and more preferably a linear or branched alkane having 12 to 14 carbon atoms基 or alkenyl.

From the viewpoint of improving cleanliness, foamability, rinsability, and feeling during use (e.g., moisturizing feeling), the average molar value n of the added oxyethylene group is preferably 0.5 to 10. And more preferably 0.5 to 5, and still more preferably 0.5 to 3.

Examples of Y include alkali metals such as sodium and potassium; alkaline earth metals such as calcium; alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine; and cations derived from basic amino acids such as arginine and lysine.

From the viewpoint of improving cleansing properties, foamability, and long-term storage stability, the content of component (B) in the skin cleanser composition is 0.15% by mass or more, and preferably 0.18% by mass or more , More preferably 0.19% by mass or more, and more preferably 0.20% by mass or more, and 2% by mass or less, preferably 1.8% by mass or less, more preferably 1.6% by mass or less, still more preferably 1.0% by mass or less , And more preferably 0.50% by mass or less. The specific range of the content of the component (B) is 0.15 to 2% by mass, preferably 0.18 to 1.8% by mass, more preferably 0.19 to 1.6% by mass, still more preferably 0.20 to 1.0% by mass, and still more preferably 0.20 to 0.50% by mass %.

From the viewpoint of improving skin cleanliness, expandability, foamability, rinsability, scrub feeling, dispensability when transferred from the container, feeling during use (e.g., moisturizing feeling), and storage stability, The mass content ratio (A/B) of component (A) to component (B) is preferably 5 or more, more preferably 10 or more, still more preferably 30 or more, and still more preferably 56 or more , And preferably 80 or less, more preferably 70 or less, still more preferably 68 or less, and still more preferably 65 or less. The specific range of A/B is preferably 5 to 80, more preferably 10 to 70, still more preferably 30 to 68, and still more preferably 56 to 65.

The component (C) used in the present invention is an amphoteric surfactant. Amphoteric surfactants are not particularly limited, as long as they are commonly used in detergents, and examples thereof include betaine acetate surfactants such as lauryl dimethylamino betaine acetate, amine oxide surfactants such as Lauryl dimethylamine oxide, imidazolinium betaine surfactants such as 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, amidobetaine surfactants such as lauramide Propyl betaine, and sultaine surfactants such as lauryl hydroxysultaine.

Among them, from the viewpoint of improving the foamability and the feeling when using the skin cleansing composition, amide betaine surfactants such as lauryl amidopropyl betaine, and sultaine surfactants such as Lauryl hydroxysultaine is preferred.

From the viewpoint of improving foamability, rinsability, and storage stability, the content of component (C) in the skin cleanser composition is 0.1% by mass or more and 4% by mass or less, and preferably 0.2% by mass or more, more preferably 0.3% by mass or more, still more preferably 0.4% by mass or more, and still more preferably 0.6% by mass or more, and preferably 3% by mass or less, more preferably 2% by mass or less, It is still more preferably 1.8% by mass or less, and still more preferably 1.0% by mass or less. The specific range of the content of the component (C) is preferably 0.2 to 3% by mass, more preferably 0.3 to 2% by mass, still more preferably 0.4 to 1.8% by mass, and still more preferably 0.6 to 1.0% by mass.

From the viewpoint of improving foamability, rinsability, spreadability, scrub feeling, feeling during use (for example, moisturizing feeling), and storage stability, the total of component (B) and component (C) The content (B+C) is preferably 0.3% by mass or more, more preferably 0.5% by mass or more, still more preferably 0.6% by mass or more, and still more preferably 0.7% by mass or more, and preferably 6% by mass or less , More preferably 4% by mass or less, still more preferably 2% by mass or less, and still more preferably 1.0% by mass or less. The specific range of the above content (B+C) is better It is 0.3 to 6% by mass, more preferably 0.5 to 4% by mass, still more preferably 0.6 to 2% by mass, and still more preferably 0.7 to 1.0% by mass.

The component (D) used in the present invention is a carboxyvinyl polymer modified by an alkyl group. The alkyl-modified carboxyvinyl polymer is preferably (meth)acrylic acid/(meth)acrylic acid alkyl ester copolymer, and more preferably is poly(meth)acrylic acid, acrylic acid ester/methacrylic acid alkyl Ester copolymer (INCI: ACRYLATES/C10-30 ALKYL ACRYLATE CROSSPOLYMER). Examples of commercial products are Carbopol SC200, Carbopol ETD2020, and Pemulen TR-2. These can be used alone or in combination of two or more.

From the viewpoints of improving foamability, expandability, scrub feeling, dispensability when transferred from a container, feeling during use (for example, moisturizing feeling), and storage stability, the components of the skin cleansing agent composition The content of (D) is 0.1% by mass or more and 1.0% by mass or less, and preferably 0.2% by mass or more, more preferably 0.3% by mass or more, and still more preferably 0.5% by mass or more. The specific range of the content of the component (D) is preferably 0.2 to 1.0% by mass, more preferably 0.3 to 1.0% by mass, and still more preferably 0.5 to 1.0% by mass.

Note that the skin cleansing composition may contain water-soluble polymers other than component (D), such as, for example, a carboxyvinyl polymer that has not been modified by an alkyl group, without detracting from the effects of the present invention. From the viewpoint of improving foamability, feeling during use, and storage stability, the content of the non-alkyl-modified carboxyvinyl polymer in the skin cleanser composition is preferably 0.3% by mass or less , More preferably 0.1% by mass or less, still more preferably 0.01% by mass or less, and most preferably substantially 0% by mass.

The component (E) used in the present invention is cellulose particles. Examples of cellulose particles include cellulose-based powders having an average particle size of 100 to 700 microns, and disintegrated particles containing cellulose. Among them, the base with an average particle size of 100 to 700 microns It is better for cellulose powder.

Examples of cellulose-based powders include cellulose acetate, powdered cellulose, and crystalline cellulose. The average particle size of these cellulose-based powders is preferably 100 to 700 microns.

In the present invention, the average particle size of the cellulose-based powder means the volume average particle size, and is measured with a laser scattering particle size distribution analyzer (LA-910 manufactured by Horiba, Ltd.).

An example of the disintegrating particles containing cellulose includes one or more selected from the group consisting of crystalline cellulose and corn starch; and particles of ethyl cellulose.

Among them, crystalline cellulose and corn starch constitute the matrix of disintegrating granules. These base powders are used as primary particles that are insoluble in water. The shape of these primary particles may be any of spherical, amorphous, etc., and among them, a spherical shape is preferred from the viewpoint of reducing excessive stimulation during massage.

Crystalline cellulose is obtained by partially depolymerizing and purifying α-cellulose using mineral acid, and refers to unmodified cellulose.

The disintegrating particles include one or more selected from crystalline cellulose and corn starch, and from the viewpoint of improving the storage stability of cosmetics at high temperatures, it is preferable to include crystalline cellulose.

From the point of view of providing actual granular feeling and better disintegration speed of disintegrating granules during massage, the content of crystalline cellulose and corn starch in disintegrating granules is based on the total disintegrating granules, with crystalline cellulose and corn starch. The total amount of starch) 80% by mass or more, preferably 85% by mass or more, and more preferably 89% by mass or more, and 99% by mass or less, more preferably 97% by mass or less, and still more preferably 95% by mass Or below.

The disintegrating granules may contain other than the aforementioned crystalline cellulose or corn starch The components serve as the matrix. Examples of substrates other than crystalline cellulose and corn starch include organic polymer compounds such as polyethylene, polystyrene, polyester, polyvinyl chloride, polyamide, polypropylene, nylon, polyvinylidene fluoride, polyamine Base formate, acrylic resin, polysiloxane, corn starch, starch and its derivatives; and inorganic compounds such as silica, alumina, talc, kaolin, titanium oxide, zinc oxide, quartz, and calcium phosphate.

The shape of the primary particles composed of such a matrix powder may be any of spherical, amorphous, etc., and among them, a spherical shape is preferred from the viewpoint of reducing excessive stimulation of the skin during massage.

The content of the matrix other than crystalline cellulose and corn starch in the disintegrated granules is preferably 15% by mass or less, more preferably 10% by mass or less, still more preferably 5% by mass or less, still more preferably based on the total disintegrated granules 1% by mass or less, and particularly preferably 0.1% by mass or less.

From the viewpoint of providing actual granular feeling and better disintegration speed of disintegrated granules during massage, the average particle size of the original particles of crystalline cellulose, corn starch and other substrates is preferably 1 micron or more, and more preferably 3 microns or more. In addition, from the viewpoint of suppressing excessive irritation after disintegration of disintegrating particles, the average particle size of the original particles of crystalline cellulose, corn starch and other substrates is preferably 100 microns or less, more preferably 20 microns or less, and More preferably 15 microns or less.

Here, the average particle size of the primary particles of crystalline cellulose, corn starch and other substrates is the number average particle size measured with a laser scattering particle size distribution analyzer LA-910 (manufactured by Horiba, Ltd.).

Next, among the components contained in the disintegrating granules, ethyl cellulose acts as a binder in the disintegrating granules.

By providing actual graininess and better disintegration speed of disintegrating granules during massage From a viewpoint, the content of ethyl cellulose in the disintegrated particles is 1% by mass or more, preferably 3% by mass or more, and more preferably 5% by mass or more, and preferably 18% by mass based on the total disintegrated particles. Or less, more preferably 15% by mass or less, and still more preferably 12% by mass or less.

The disintegrating granules may also contain binders other than ethyl cellulose.

Examples of binders other than ethyl cellulose include oil binders that are solid at room temperature such as animal and vegetable oils, for example, hydrogenated fish oil, hydrogenated castor oil, and hydrogenated rapeseed oil; and aqueous binders such as organic polymer compounds Such as acetyl cellulose, nitrocellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, polyvinylpyrrolidone, vinyl acetate, and polyvinyl alcohol.

From the viewpoint of improving the storage stability of cosmetics at high temperatures and providing actual granular feeling and better disintegration speed of disintegrated granules during massage, the content of binders other than ethyl cellulose in disintegrated granules is based on the whole The disintegrating particles are preferably 5% by mass or less, more preferably 3% by mass or less, still more preferably 1% by mass or less, and still more preferably 0.1% by mass or less, and the disintegrating particles are substantially free of ethyl groups Binders other than cellulose are particularly good.

From the viewpoint of providing actual graininess and better disintegration speed of disintegrating granules during massage, the blending of matrix and binder in disintegrating granules is better. Matrix: binder=80:20 to 99:1, More preferably 85:15 to 98:2, and even better 90:10 to 95:5.

Disintegrated granules can be produced by commonly used granulation methods such as fluidized bed granulation method, agitation granulation method, and extrusion granulation method. Among them, the disintegrating particles are suitably manufactured according to the following method: such as the method described in JP-A-S60-152407, more specifically, a method of dissolving a water-insoluble binder in a solvent, and volatilizing the organic solvent The method; or the method described in JP-A-H6-271417, which is more specific A method of mixing the water-insoluble binder powder with the original particles of the particles, then granulating with the water-insoluble binder, and then heating to melt the water-insoluble binder powder, and cooling to improve the water resistance of the particles .

From the viewpoint of providing actual graininess and better disintegration speed of disintegrating particles during massage, the average particle size of disintegrating particles is preferably 100 microns or more, more preferably 200 microns or more, and even more preferably 250 microns or above. In addition, from the viewpoint of reducing excessive skin irritation, the average particle size of the disintegrating particles is preferably 2,000 microns or less, more preferably 1,000 microns or less, and even more preferably 500 microns or less.

Here, the average particle size of the disintegrated particles is the number average particle size before blending into cosmetics measured by the following method. That is, 10 particles of the disintegrated particles are randomly selected, the particle size of each particle is measured with Digipa PC-15J (manufactured by Mitutoyo Corporation), and their average value is calculated to obtain the number average particle size of the disintegrated particles.

From the viewpoint of achieving a good scrub feeling and from the viewpoint of improving foamability and storage stability, the content of component (E) in the skin cleanser composition is 0.1% by mass or more and 10% by mass or Below, and preferably 0.3% by mass or more, and more preferably 0.5% by mass or more, and preferably 8% by mass or less, more preferably 6% by mass or less, and still more preferably 5% by mass or less. The specific range of the content of the component (E) is preferably 0.3 to 8% by mass, more preferably 0.5 to 6% by mass, and still more preferably 0.5 to 5% by mass.

In the present invention, from the viewpoints of good scrub feeling, foamability and storage stability, the mass content ratio (D/E) of component (D) to component (E) is preferably 0.025 or more, More preferably 0.05 or more, still more preferably 0.125 or more, and still more preferably 0.25 or more, and more preferably 3.3 or less, more preferably 2 or less, still more preferably 1 or more , And more preferably 0.7 or less.

From the viewpoint of improving storage stability and moisturization, the skin cleansing composition of the present invention preferably further contains (F) polyol. The polyol may be any one commonly used in detergent compositions, and examples thereof include polyols such as glycerin, propylene glycol, dipropylene glycol, ethylene glycol, polyethylene glycol, isoprene glycol, and 1,3 -Butylene glycol; and sugar alcohols such as sorbitol, xylitol, mannitol, and maltitol. Among them, sugar alcohols are preferred. Regarding the component (F), these may be used alone or in a combination of two or more.

From the standpoint of improving storage stability and moisturization, the content of component (F) in the skin cleanser composition is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and still more preferably 1% by mass Or more, more preferably 4% by mass or more, and most preferably 5.5% by mass or more, and preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably 12% by mass or less, and still more preferably 9% by mass or less, and most preferably 8% by mass or less. The specific range of component (F) is preferably from 0.1 to 20% by mass, more preferably from 0.5 to 15% by mass, still more preferably from 1 to 12% by mass, still more preferably from 4 to 9% by mass, and still more preferably It is 5.5 to 8% by mass.

The skin cleansing composition of the present invention may further include water as a solvent. The water content in the entire composition is preferably 20 to 90% by mass, more preferably 40 to 85% by mass, and still more preferably 60 to 80% by mass, and when considering the aforementioned components and other components constituting the detergent composition The time-sharing system is the remaining component of the detergent composition.

The skin cleansing composition of the present invention may further include components commonly used in cleansing agents, for example, surfactants other than components (A), (B) and (C), and components (F) In addition, moisturizers, oily components, bactericides, anti-inflammatory agents, preservatives, clamps, salts, pearlescent agents, fragrances, cooling agents, dyes, ultraviolet absorbers, oxidation inhibitors, plant extracts or the like. These reagents are not limited to their intended use, The system can be used for other purposes depending on the purpose. For example, the fragrance can be used as a cooling agent, or it can also be used for other purposes besides its intended use, for example, as an agent having the effects of a fragrance and a cooling agent.

The skin cleansing composition of the present invention is prepared by mixing the components of the formulation according to a conventional method, and is obtained in a liquid state.

Here, liquid refers to a viscosity of 300 to 18,000 mPa·s as measured by a Brookfield type viscometer (manufactured by Tokyo Keiki Inc.) at 30°C. In addition, 1,000 to 15,000 mPa.s is preferable, and in view of the dispensability and expandability of the formulation, 2,000 to 12,000 mPa.s is preferable.

In the skin cleansing composition of the present invention, the pH is preferably 8-12, and more preferably 9-11. In pH measurement, the value used is obtained by measuring a detergent composition diluted 20 times with ion exchange water at 25°C.

The skin cleansing composition of the present invention is suitable as, for example, a face cleansing agent, a body lotion, and a hand lotion, and a face cleansing agent and a body lotion are preferred.

An example of a method of cleansing the skin using the skin cleansing composition of the present invention is as follows. That is, apply an appropriate amount of the skin cleansing composition of the present invention to the body, that is, apply to the skin of the body parts such as the face, hands and arms, feet and legs, and torso, and lather to clean, then Rinse off with hot water from a shower or the like. Alternatively, an appropriate amount of the skin cleansing agent composition of the present invention can be applied to cleaning aids such as towels, sponges and brushes, and foamed for cleaning.

Regarding the foregoing specific examples, the present invention further discloses the following composition.

<1> A skin cleansing composition containing the following components (A) to (E): (A) 6 mass% or more and 18 mass% or less as an acid and having a neutralization degree of 0.85 to 1.02 Fatty acid or its salt represented by formula (1): R ¹ -COOX (1)

Wherein R ¹ represents an alkyl group having 11 to 23 carbon atoms, and X represents a hydrogen atom, alkali metal, ammonium or organic ammonium; (B) 0.15 mass% or more and 2 mass% or less are represented by formula (2) The alkyl ether sulfate: R ² -O-(CH ₂ CH ₂ O) _n -SO ₃ Y (2)

Wherein R ² represents an alkyl or alkenyl group with 8 to 22 carbon atoms, n represents the average number of moles of added oxyethylene groups from 0.5 to 12, and Y represents a hydrogen atom, alkali metal, alkaline earth metal, ammonium Or organic ammonium; (C) 0.1% by mass or more and 4% by mass or less amphoteric surfactant; (D) 0.1% by mass or more and 1.0% by mass or less of alkyl-modified carboxyvinyl polymer ; And (E) 0.1% by mass or more and 10% by mass or less of cellulose particles.

<2> The skin cleansing composition according to <1>, wherein in formula (1), R ¹ is a linear alkyl group having 11 to 16 carbon atoms.

<3> The skin cleansing composition according to <1> or <2>, wherein the neutralization degree of the component (A) is preferably 0.85 to 0.97, and more preferably 0.87 to 0.94.

<4> The skin cleansing composition according to any one of <1> to <3>, wherein the content of the component (A) is preferably 8% by mass or more, more preferably 10% by mass or more, and Still more preferably 12% by mass or more, and more preferably 17% by mass or less, and more preferably 16% by mass or less.

<5> The skin cleansing composition according to any one of <1> to <4>, wherein the component (A) The content is preferably 8 to 17% by mass, more preferably 10 to 17% by mass, and still more preferably 12 to 16% by mass.

<6> The skin cleansing composition according to any one of <1> to <5>, wherein in formula (2), R ^{2 is} preferably a linear or branched alkane having 12 to 18 carbon atoms Alkyl or alkenyl, and more preferably linear or branched alkyl or alkenyl having 12 to 14 carbon atoms.

<7> The skin cleansing composition according to any one of <1> to <6>, wherein in formula (2), the average molar value n of the added oxyethylene group is preferably 0.5 to 10 , More preferably 0.5 to 5, and even more preferably 0.5 to 3.

<8> The skin cleansing composition according to any one of <1> to <7>, wherein the content of component (B) in the skin cleansing composition is preferably 0.18% by mass or more and 1.8% by mass % Or less, more preferably 0.19% by mass or more and 1.6% by mass or less, and still more preferably 0.20% by mass or more and 1.0% by mass or less.

<9> The skin cleansing composition according to any one of <1> to <8>, which has preferably 5 or more, more preferably 10 or more, still more preferably 30 or more, and still more preferably 56 or Above, and preferably 80 or below, more preferably 70 or below, still more preferably 68 or below, and still more preferably 65 or below, the mass content ratio of component (A) to component (B) (A/B) .

<10> The skin cleansing composition according to any one of <1> to <9>, wherein the mass content ratio (A/B) of component (A) to component (B) is preferably 5 to 80 , More preferably 10 to 70, still more preferably 30 to 68, and still more preferably 56 to 65.

<11> The skin cleansing composition according to any one of <1> to <10>, wherein the component (C) is selected from the group consisting of betaine acetate surfactants, amine oxide surfactants, and imidazolium One or more of betaine surfactants, amide betaine surfactants, and sultaine surfactants.

<12> The skin cleansing composition according to any one of <1> to <11>, wherein the component (C) is one or more selected from the group consisting of amide betaine surfactants and sulfobetaine surfactants.

<13> The skin cleansing composition according to any one of <1> to <12>, wherein the content of component (C) in the skin cleansing composition is preferably 0.2% by mass or more, more preferably 0.3% by mass or more, more preferably 0.4% by mass or more, and still more preferably 0.6% by mass or more, and preferably 3% by mass or less, more preferably 2% by mass or less, still more preferably 1.8% by mass or less , And more preferably 1.0% by mass or less.

<14> The skin cleansing composition according to any one of <1> to <13>, wherein the content of component (C) in the skin cleansing composition is preferably 0.2 to 3% by mass, more preferably 0.3 to 2% by mass, still more preferably 0.4 to 1.8% by mass, and still more preferably 0.6 to 1.0% by mass.

<15> The skin cleansing composition according to any one of <1> to <14>, which has preferably 0.3% by mass or more, more preferably 0.5% by mass or more, and still more preferably 0.6% by mass or more, And more preferably 0.7% by mass or more, and preferably 6% by mass or less, more preferably 4% by mass or less, still more preferably 2% by mass or less, and still more preferably 1.0% by mass or less (B ) And the total content of component (C).

<16> The skin cleansing composition according to any one of <1> to <15>, wherein the total content of component (B) and component (C) is preferably 0.3 to 6% by mass, more preferably 0.5 To 4% by mass, still more preferably 0.6 to 2% by mass, and still more preferably 0.7 to 1.0% by mass or less.

<17> The skin cleansing composition according to any one of <1> to <16>, wherein the content of component (D) in the skin cleansing composition is preferably 0.2% by mass or more, more preferably 0.3% by mass or more, and more preferably 0.5% by mass or more.

<18> The skin cleansing composition according to any one of <1> to <17>, wherein the content of the component (D) is preferably 0.2 to 1.0% by mass, more preferably 0.3 to 1.0% by mass, and It is still more preferably 0.5 to 1.0% by mass.

<19> The skin cleansing composition according to any one of <1> to <18>, wherein the component (E) is preferably a cellulose-based powder having an average particle size of 100 to 700 microns, or Cellulose-containing disintegrating particles having an average particle size of 100 to 700 microns, and more preferably cellulose-based powder having an average particle size of 100 to 700 microns.

<20> The skin cleansing composition according to any one of <1> to <19>, wherein the content of component (E) in the skin cleansing composition is preferably 0.3% by mass or more, and more It is preferably 0.5% by mass or more, and more preferably 8% by mass or less, more preferably 6% by mass or less, and still more preferably 5% by mass or less.

<21> The skin cleansing composition according to any one of <1> to <20>, wherein the content of the component (E) is preferably 0.3 to 8% by mass, more preferably 0.5 to 6% by mass, And still more preferably 0.5 to 5% by mass.

<22> The skin cleansing composition according to any one of <1> to <21>, which has preferably 0.025 or more, more preferably 0.05 or more, still more preferably 0.125 or more, and still more preferably 0.25 or Above, and preferably 3.3 or below, more preferably 2 or below, still more preferably 1 or below, and even more preferably 0.7 or below, the mass content ratio of component (D) to component (E) (D/E) .

<23> The skin cleansing composition according to any one of <1> to <22>, which further comprises component (F) polyol.

<24> The skin cleansing composition according to <23>, wherein the component (F) is selected from one or more sugar alcohols.

<25> The skin cleansing composition according to <23> or <24>, which has preferably 0.1% by mass or more, more preferably 0.5% by mass or more, still more preferably 1% by mass or more, and still more preferably 4 Mass% or more, and more preferably 5.5 mass% or more, and preferably 20 mass% or less, more preferably 15 mass% or less, still more preferably 12 mass% or less, and still more preferably 9 mass% or less, And more preferably 8% by mass or less in skin cleansing composition The content of component (F).

<26> The skin cleansing composition according to any one of <23> to <25>, wherein the content of the component (F) is preferably 0.1 to 20% by mass, more preferably 0.5 to 15% by mass, More preferably, it is from 1 to 12% by mass, still more preferably is from 4 to 9% by mass, and even more preferably is from 5.5 to 8% by mass.

<27> The skin cleansing composition according to any one of <1> to <26>, which further contains water.

<28> The skin cleanser composition according to <27>, which has a water content of 20 to 90% by mass, preferably 40 to 85% by mass, and more preferably 60 to 80% by mass.

<29> The skin cleansing composition according to any one of <1> to <28>, wherein the composition is in a liquid state and has preferably 300 to 18,000 mPa.s, more preferably 1,000 to 15,000 mPa.s , And even better the viscosity at 30°C from 2,000 to 12,000mPa.s.

<30> A cleaning method comprising: applying the detergent composition according to any one of <1> to <28> to the skin, cleaning the skin, and then rinsing the skin.

<31> A use of the cleansing composition according to any one of <1> to <28> as a skin cleansing composition, wherein the cleansing composition is applied to the skin to cleanse the skin.

[Example]

The present invention will be explained in more detail with reference to the following examples.

[Examples 1 to 10 and Comparative Examples 1 to 9]

The skin cleansing agent having the composition shown in Table 1 and Table 2 was manufactured and the efficacy was evaluated. The evaluation results are shown in Table 1 and Table 2. Note that component (A) is fatty acid and fatty acid salt or fatty acid salt, but in the present invention, the content of component (A) is taken as the content of acid, so the blending amount of fatty acid is described as the amount of component (A) .

(Production method)

Mix the components (except potassium hydroxide) and water, and heat to 70°C until uniform. Next, the desired amount of potassium hydroxide is added, and the mixture is stirred until uniform. In addition, the mixture was cooled to room temperature (25°C) under stirring to obtain a skin cleansing composition. A 250 g bottle with a lid was filled with 200 g of the obtained skin cleansing composition.

(assessment method) (1) Distributable

Under the condition of 25°C, each of the five expert participants held the container so that the dispensing outlet side was perpendicular to the palm of the hand, and took out 3 grams of skin cleansing composition with one gentle push. Next, the ease of taking out the formulation from the container was evaluated according to the following criteria. The average of the results from the five participants is the evaluation result of the liquid skin cleanser.

5; Good distributability.

4; Slightly better distributable.

3; Medium.

2; Slightly distributable.

1; Poor distributability.

(2) Scalability

Five expert participants each took out 3 grams of each skin cleanser composition and placed them on their hands, added a small amount of water, and spread the mixture to the entire body by hand. Next, each requested him to perform an extensible sensory evaluation based on the five-point scale evaluation standard shown below at that time. Determine the average of the scores from the five participants.

5; The formulation is easy to expand evenly.

4; The formulation is slightly easy to spread evenly.

3; Medium.

2; The formulation is slightly difficult to expand evenly.

1; The formulation is difficult to expand evenly.

(3) Foamability

The five expert participants each took out 1 gram of each skin cleanser and placed them on their hands, added a small amount of water, and rubbed their hands together 10 times to foam. Next, they were required to perform a sensory evaluation of foamability based on the five-point scale evaluation criteria shown below at that time. Determine the average of the scores from the five participants.

5; Good foamability.

4; Slightly better foamability.

3; Medium.

2; Slightly poor foamability.

1; Poor foamability.

(4) Scrub feeling

Five expert participants each took out 1 gram of each skin cleanser composition and placed them on their hands, added a small amount of water, and rubbed their hands together 10 times to foam. Next, massage one arm 10 times while spreading the foam on the arm. In addition, the hand of the other arm was placed on the one arm, and the sensory evaluation of the graininess produced by scrubbing was performed at that time according to the five-point scale evaluation standard shown below. Determine the average of the scores from the five participants.

5; The particles are clearly felt.

4; Particles are felt.

3; Slightly felt particles.

2; Do not feel the particles.

1; No particles are felt at all.

(5) Flushability

The five expert participants each took out 1 gram of each skin cleanser and placed them on their hands, added a small amount of water, and rubbed their hands together 10 times to foam. Next, massage one arm 10 times while spreading the foam on the arm. Next, rinse off the foam with tap water. Then, they were required to perform sensory evaluation of flushability according to the five-point scale evaluation criteria shown below. Determine the average of the scores from the five participants.

5; Rinse off easily.

4; Rinse off slightly easily.

3; Medium.

2; It is not easy to wash off.

1; It is not easy to wash off.

(6) Moisturizing

The five expert participants each took out 1 gram of each skin cleanser and placed them on their hands, added a small amount of water, and rubbed their hands together 10 times to foam. Next, massage one arm 10 times while spreading the foam on the arm. Next, rinse off the foam with tap water. Then, after wiping the arm with a towel, he was asked to evaluate the feeling of moisturization according to the five-point scale evaluation standard shown below. Determine the average of the scores from the five participants.

5; Wet.

4; Slightly moist.

3; Medium.

2; Not too moist.

1; No wetting.

(7-1) Storage stability at 10℃

A glass bottle with a capacity of 130 ml was filled with 100 grams of each skin cleansing composition. Next, the bottle was sealed and sealed, and allowed to stand at 10°C for seven days, and then the appearance and state of the skin cleansing agent were visually observed and scored according to the two-point scale evaluation standard shown below.

a; In appearance, there is no precipitation, and there is fluidity.

b; In appearance, precipitation is observed, and there is no fluidity.

(7-2) Storage stability at 50℃

A glass bottle with a capacity of 130 ml was filled with 100 grams of each skin cleansing composition. Next, the bottle was sealed and sealed, and allowed to stand at 50°C for seven days, and then the suspension (or sedimentation) state of the scrub in the skin cleansing agent or the separation state of the liquid was observed with the naked eye, and according to the following Two-point scale evaluation standard to score.

Two-point scale evaluation standard;

a; The water-insoluble particles are uniformly dispersed and the liquid is uniform.

b; The water-insoluble particles are unevenly distributed, or/and the liquid separates.

*1 LUNAC L-98 (manufactured by Kao Corporation)

*2 LUNAC MY-98 (manufactured by Kao Corporation)

*3 LUNAC P-95 (manufactured by Kao Corporation)

*4 JP-A-2013-53092 Preparation Example 1

*5 EMAL 227HP (manufactured by Kao Corporation, average POE=2, active content: 27%)

*6 AMPHITOL 20HD (manufactured by Kao Corporation, active content: 30%)

*7 AMPHITOL 20AB (manufactured by Kao Corporation, active content: 30%)

*8 SORBITOL (manufactured by Kao Corporation, active content: 70%)

*9 Erythritol (manufactured by Maruzen Chemicals Co., Ltd.)

*10 Xylitol (manufactured by Eisai Food & Chemical Co., Ltd.)

*11 CARBOPOL SC200 (manufactured by Noveon, Inc.)

*12 CARBOPOL 981 (manufactured by Lubrizol Advanced Materials, Inc.)

*13 VITACEL CS250G (manufactured by J.Rettenmaier & Söhne GmbH+Co KG, cellulose content higher than 99%, specific density 1.3g/cm ³ , average particle size: 300 microns (by DIN EN ISO 4610/air jet sieve))

*14 CR-50 (manufactured by Ishihara Sangyo Kaisha, Ltd.)

In Table 1 and Table 2, Comparative Examples 1 and 2 each have a content of component (A) outside the scope of the present invention. Comparative Examples 3 and 4 each have a degree of neutralization of component (A) outside the scope of the present invention. Comparative Example 5 has the content of each of components (B) and (C) outside the scope of the present invention. Comparative Example 6 is an example that does not contain components (B) and (C). Comparative Example 7 has a content of component (D) outside the scope of the present invention. Comparative Examples 8 and 9 each have polymers outside the scope of the present invention. These comparative examples are better than the implementation of the present invention in at least one of scrub feeling, foamability, rinsability, dispensability when transferred from a container, feeling during use (moisturizing feeling), and storage stability Examples 1 to 10 are poor. According to Examples 1 to 10 of the present invention, there is no precipitation after storage, and the fluidity is excellent. Therefore, Examples 1 to 10 exhibit excellent dispensability when transferred from the container.

Claims (5)

A skin cleansing composition comprising the following components (A) to (E), and having a mass content ratio (A/B) of component (A) to component (B) of 5 or more and 80 or less: (A) The fatty acid represented by formula (1) or its salt, which is 6 mass% or more and 18 mass% or less as an acid and has a neutralization degree of 0.85 to 1.02: R ¹ -COOX (1) wherein R ¹ represents 11 An alkyl group having to 16 carbon atoms, and X represents a hydrogen atom, alkali metal, ammonium or organic ammonium; (B) 0.15% by mass or more and 2% by mass or less of alkyl ether sulfate represented by formula (2): R ² -O-(CH ₂ CH ₂ O) _n -SO ₃ Y (2) where R ² represents an alkyl or alkenyl group having 12 to 14 carbon atoms, and n represents 0.5 to 3 added oxyethylene groups The average number of moles, and Y represents hydrogen atom, alkali metal, alkaline earth metal, ammonium or organic ammonium; (C) 0.1% by mass or more and 4% by mass or less of amphoteric surfactant; (D) 0.1% by mass or more and 1.0 Alkyl-modified carboxyvinyl polymer with a mass% or less; and (E) 0.1 mass% or more and 10 mass% or less of cellulose particles. Such as the skin cleansing composition of claim 1, which has a viscosity of 300 mPa.s or more and 18,000 mPa.s or less at 30°C. Such as the skin cleansing composition of claim 1 or 2, which has a total content of component (B) and component (C) of 0.3% by mass or more and 6% by mass or less. For example, the skin cleansing composition of claim 1 or 2 has a mass content ratio (D/E) of component (D) to component (E) of 0.025 or more and 3.3 or less. The skin cleansing composition of claim 1 or 2, which further comprises component (F), which is a polyhydric alcohol.