TW201808258A - 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 detergent composition

The present invention relates to a skin cleansing composition comprising particles.

In view of availability, many skin cleansers such as facial cleansers and body washes are in liquid or foam form. These skin cleansing agents contain an anionic surfactant having a high cleaning power as a main detergent. Further, in order to enhance the sebum removal efficiency, a skin cleansing agent containing a scouring agent such as polyethylene beads and organogel particles has 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 detergent 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 Fatty acid or a salt thereof 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, an alkali metal, an ammonium or an organic ammonium; (B) 0.15 mass% or more and 2 mass% or less are represented by the formula (2) 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 having 8 to 22 carbon atoms, n represents an average molar number of an oxygen-extended ethyl group added from 0.5 to 12, and Y represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium Or an organic ammonium; (C) 0.1% by mass or more and 4% by mass or less of the amphoteric surfactant; (D) 0.1% by mass or more and 1.0% by mass or less of the alkyl-modified carboxyvinyl polymer And (E) 0.1% by mass or more and 10% by mass or less of the cellulose particles.

Skin cleansers containing polyethylene beads which are widely used in the past are not entirely satisfactory in terms of feeling when used and the like, and there is still a need to develop a skin cleansing agent containing novel water-insoluble particles. To cope with this situation, the inventors attempted to develop a detergent containing cellulose particles as water-insoluble particles.

However, it has been found that when cellulose particles are incorporated into the detergent together with the anionic surfactant, new problems arise with regard to stability, dispensability, foamability, etc., such as when transferred from the container after storage. Reduced dispensability.

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

The present inventors have extensively studied and found that by using both a fatty acid salt and an alkyl ether sulfate as an anionic surfactant, and an amphoteric surfactant Blending with a specific amount of the alkyl-modified carboxyvinyl polymer to obtain dispensability, foamability, rinsability, scrub feel, and stability after long-term storage upon transfer from the container The skin detergent composition containing cellulose particles thus completed the present invention.

The skin detergent composition of the present invention comprises cellulose particles as a scrubbing component, which produces an excellent scrubbing feeling, and has good dispensability from container transfer, 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 detergent composition of the present invention is a fatty acid represented by the following formula (1) and having a degree of neutralization of 0.85 to 1.02 or a salt thereof: R ¹ -COOX (1)

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

In the 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, abietic acid, tetracosic acid, and salts thereof, and lauric acid, myristic acid, palmitic acid, And its salts are preferred. Among them, lauric acid, myristic acid, and potassium salt of palmitic acid are more preferable. These fatty acids or salts thereof may be used singly or in combination of two or more thereof.

Fat from the standpoint of improving cleanliness, expandability, foamability, rinsability, scrubbing feel, dispensability from container transfer, and storage stability The degree of neutralization of the acid or its salt (1) is from 0.85 to 1.02, preferably from 0.85 to 0.97, and still more preferably from 0.87 to 0.94. Here, the degree of neutralization is represented by the ratio of the molar number of the base to be added 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 detergent composition of the present invention is less than 1.0, it is considered to contain a fatty acid and a salt thereof as a compound represented by the formula (1), and when the degree of neutralization is more than 1.0, it is regarded as For the presence of only fatty acid salts. In other words, 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.

The content of the acid component (A) in the skin detergent composition is 6% by mass or more and 18 masses from the viewpoints of improving skin cleansing property, foamability, rinsability, and storage stability. % or less, preferably 8 mass% or more, more preferably 10 mass% or more, and still more preferably 12 mass% or more, and preferably 17 mass% or less, and more preferably 16 mass% or less. The specific range of the content of the component (A) is preferably from 8 to 17% by mass, more preferably from 10 to 17% by mass, and still more preferably from 12 to 16% by mass.

The content of the fatty acid or a salt thereof other than the acid component (A) in the skin detergent composition is preferably 2% by mass or less, more preferably 1% by mass or less, still more preferably 0.1% by mass or less. And better 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 having 8 to 22 carbon atoms, n represents an average molar number of an oxygen-extended ethyl group added from 0.5 to 12, and Y represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium (NH ₄ ⁺ ) or organic ammonium.

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

The average molar value n of the added oxygen-extended ethyl group is preferably from 0.5 to 10 from the viewpoint of improving cleanability, foamability, rinsability, and feeling during use (for example, moist feeling). And more preferably 0.5 to 5, and even 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.

The content of the component (B) in the skin detergent composition is 0.15% by mass or more, and preferably 0.18% by mass or more, from the viewpoints of improving cleanability, foamability, and long-term storage stability. More preferably, it is 0.19% by mass or more, and further 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 viewpoints of improving skin cleanability, expandability, foamability, rinsability, scrub feeling, dispensability upon transfer from a container, feeling during use (for example, moist feeling), and storage stability, The mass ratio (A/B) of the component (A) to the 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 from 5 to 80, more preferably from 10 to 70, still more preferably from 30 to 68, and still more preferably from 56 to 65.

Component (C) used in the present invention is an amphoteric surfactant. The amphoteric surfactant is not particularly limited as long as it is usually used in a detergent, and examples thereof include a betaine acetate surfactant such as lauryldimethylamine acetate betaine, an amine oxide surfactant such as Lauryl dimethylamine oxide, imidazolinium betaine surfactant such as 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, guanamine betaine surfactant such as laurylamine Propyl betaine, and sulphobetaine surfactants such as lauryl hydroxysultaine.

Among them, a guanamine-betaine surfactant such as lauric acid propyl betaine, and a sulfobetaine surfactant such as a smear-promoting agent and a sulfobetaine surfactant are used, for example, from the viewpoint of improving foamability and feeling when using a skin detergent composition. Lauryl hydroxy sulfobetaine is preferred.

The content of the component (C) in the skin detergent composition is 0.1% by mass or more and 4% by mass or less, and preferably, from the viewpoints of improvement in foamability, rinsability, and storage stability. 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, More preferably, it is 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 from 0.2 to 3% by mass, more preferably from 0.3 to 2% by mass, still more preferably from 0.4 to 1.8% by mass, and still more preferably from 0.6 to 1.0% by mass.

The total of component (B) and component (C) from the viewpoints of improving foamability, rinsability, expandability, scrub feeling, feeling during use (for example, moist feeling), and storage stability 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, it is 4% by mass or less, further 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 preferred It is 0.3 to 6 mass%, more preferably 0.5 to 4 mass%, still more preferably 0.6 to 2 mass%, and still more preferably 0.7 to 1.0 mass%.

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

The components of the skin detergent composition are improved from the viewpoints of improving foamability, expandability, scrubbing feeling, dispensability upon transfer from a container, feeling during use (for example, moist feeling), and storage stability. 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 from 0.2 to 1.0% by mass, more preferably from 0.3 to 1.0% by mass, and still more preferably from 0.5 to 1.0% by mass.

Note that the skin cleanser composition may contain a water-soluble polymer other than the component (D) such as, for example, a non-alkyl modified carboxyvinyl polymer without detracting from the effects of the present invention. The content of the non-alkyl-modified carboxyvinyl polymer in the skin detergent composition is preferably 0.3% by mass or less from the viewpoint of improving foamability, feeling during use, and storage stability. More preferably, it is 0.1% by mass or less, further preferably 0.01% by mass or less, and most preferably substantially 0% by mass.

The component (E) used in the present invention is a cellulose particle. Examples of the cellulose particles include cellulose-based powders having an average particle size of 100 to 700 μm, and cellulose-containing disintegrating particles. Wherein, the base having an average particle size of 100 to 700 μm The powder of cellulose is more preferred.

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

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

An example of the cellulose-containing disintegrating granules comprises particles selected from one or more of crystalline cellulose and corn starch; and ethyl cellulose.

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

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

The disintegrating granules comprise one or more selected from the group consisting of crystalline cellulose and corn starch, and preferably comprise crystalline cellulose from the viewpoint of improving the storage stability of the cosmetic at high temperatures.

From the viewpoint of providing the actual graininess and the preferred disintegration rate of the disintegrated particles during the massage, the content of the crystalline cellulose and the corn starch in the disintegrated granules (based on the entire disintegrating granules, the crystalline cellulose and the corn) 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 comprise, in addition to the aforementioned crystalline cellulose or corn starch The component acts as a matrix. Examples of the matrix other than crystalline cellulose and corn starch include organic polymer compounds such as polyethylene, polystyrene, polyester, polyvinyl chloride, polyamide, polypropylene, nylon, polydifluoroethylene, polyamine Carbamates, acrylic resins, polyoxyalkylenes, corn starch, starches and derivatives thereof; and inorganic compounds such as vermiculite, alumina, talc, kaolin, titanium oxide, zinc oxide, quartz, and calcium phosphate.

The shape of the original particles composed of the matrix powder may be any one of a spherical shape, an amorphous shape, and the like, and among them, a spherical shape is preferable from the viewpoint of reducing excessive stimulation of the skin during massage.

The content of the matrix other than the crystalline cellulose and the 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, more preferably, based on the entire disintegrating granules. 1% by mass or less, and particularly preferably 0.1% by mass or less.

The average particle size of the primary particles of crystalline cellulose, corn starch and other substrates is preferably 1 micron or more, and more preferably from the viewpoint of providing the actual graininess and the preferred disintegration rate of the disintegrating particles during the massage. 3 microns or more. Further, the average particle size of the primary particles of crystalline cellulose, corn starch, and other substrates is preferably 100 μm or less, more preferably 20 μm or less, from the viewpoint of suppressing excessive irritation after disintegration of the disintegrating particles, 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 by a laser scattering particle size distribution analyzer LA-910 (manufactured by Horiba, Ltd.).

Next, among the components contained in the disintegrated granules, ethyl cellulose is used as a binder in the disintegrated granules.

By providing the actual graininess and the preferred disintegration rate of the disintegrating particles during massage The content of ethyl cellulose in the disintegrated granules 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 entire disintegrated granules. Or less, more preferably 15% by mass or less, and still more preferably 12% by mass or less.

The disintegrating granules may also comprise a binder other than ethylcellulose.

Examples of the binder other than ethyl cellulose include oil binders such as animal and vegetable oils which are solid at normal temperature, for example, hydrogenated fish oil, hydrogenated castor oil, and hydrogenated rapeseed oil; and aqueous binders such as organic polymer compounds. Such as acetonitrile cellulose, nitrocellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, polyvinylpyrrolidone, vinyl acetate, and polyvinyl alcohol.

The content of the binder other than ethyl cellulose in the disintegrated granules is based on the viewpoint of improving the storage stability of the cosmetic at a high temperature and providing the actual granule feeling and the preferred disintegration rate of the disintegrated granules during the massage. 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. Adhesives other than cellulose are particularly preferred.

From the standpoint of providing the actual graininess and the preferred disintegration rate of the disintegrating particles during the massage, the matrix and the binder are preferably blended in the disintegrating granules: binder: 80:20 to 99:1, Better 85:15 to 98:2, and even better 90:10 to 95:5.

The disintegrated granules can be produced by a usual granulation method such as a fluidized bed granulation method, a stirring granulation method, and an extrusion granulation method. Among them, the disintegrating granules are suitably produced according to the method described in JP-A-S60-152407, more specifically, a method of dissolving a water-insoluble binder in a solvent and volatilizing an organic solvent. Method; or as described in JP-A-H6-271417, more specifically A method for mixing water-insoluble binder powder with primary particles of granules, granulating with a water-insoluble binder, and then heating to melt the water-insoluble binder powder, and cooling to improve the water resistance of the particles .

The average particle size of the disintegrated particles is preferably 100 μm or more, more preferably 200 μm or more, and more preferably from the viewpoint of providing actual graininess and a preferred disintegration rate of the disintegrated particles during the massage. 250 microns or more. Further, the average particle size of the disintegrated particles is preferably 2,000 μm or less, more preferably 1,000 μm or less, and still more preferably 500 μm or less from the viewpoint of reducing excessive irritation to the skin.

Here, the average particle size of the disintegrated particles is the number average particle size measured before being blended into the cosmetic by the following method. Namely, 10 particles of the disintegrated particles were randomly selected, the particle size of each of the particles was measured using Digipa PC-15J (manufactured by Mitutoyo Corporation), and their average values were calculated to obtain the number average particle size of the disintegrated particles.

The content of the component (E) in the skin detergent composition is 0.1% by mass or more and 10% by mass or from the viewpoint of achieving a good scouring feeling, and from the viewpoint of improving foamability and storage stability. Hereinafter, it is 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 from 0.3 to 8% by mass, more preferably from 0.5 to 6% by mass, and still more preferably from 0.5 to 5% by mass.

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

The skin detergent composition of the present invention preferably further comprises (F) a polyol from the viewpoint of improving storage stability and moist feeling. The polyol may be used in any of the detergent compositions, and examples thereof include polyhydric alcohols such as glycerin, propylene glycol, dipropylene glycol, ethylene glycol, polyethylene glycol, isoprene glycol, and 1,3. - butanediol; and sugar alcohols such as sorbitol, xylitol, mannitol, and maltitol. Among them, sugar alcohol is preferred. Regarding the component (F), these may be used singly or in combination of two or more.

The content of the component (F) in the skin detergent composition is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and still more preferably 1% by mass from the viewpoint of improving storage stability and moist feeling. Or 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 even more preferably 9 mass% or less, and most preferably 8 mass% or less. The specific range of the 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 mass%.

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

The skin detergent composition of the present invention may further comprise a component commonly used in detergents, for example, a surfactant other than components (A), (B) and (C), in addition to component (F) Humectants, oily components, bactericides, anti-inflammatory agents, preservatives, chelating agents, salts, pearlizing agents, perfumes, coolants, dyes, ultraviolet absorbers, oxidation inhibitors, botanical extracts or the like. Such agents are not limited by the intended use of such agents. It may be used for other purposes depending on the purpose, for example, the fragrance may be used as a coolant, or may be used for other purposes than its intended use, for example, as an agent having the effects of a fragrance and a coolant.

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, the liquid state means a viscosity of 300 to 18,000 mPa.s as measured by a Brookfield type viscometer (manufactured by Tokyo Keiki Inc.) at 30 °C. Further, from 1,000 to 15,000 mPa.s is preferred, and from 2,000 to 12,000 mPa.s, preferred in view of the dispensability and expandability of the formulation.

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

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

An example of a method of cleaning the skin using the skin detergent composition of the present invention is as follows. That is, an appropriate amount of the skin cleansing composition of the present invention is applied to the body, that is, applied to the skin of the body parts such as the face, hands and arms, feet and legs, and the trunk, and foamed for cleaning, and then Rinse off with hot water from a shower or the like. Alternatively, an appropriate amount of the skin cleansing composition of the present invention can be applied to a cleaning aid such as a towel, a sponge, and a brush, and foamed for cleaning.

Regarding the above specific examples, the present invention further discloses the following compositions.

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

Wherein R ¹ represents an alkyl group having 11 to 23 carbon atoms, and X represents a hydrogen atom, an alkali metal, an ammonium or an organic ammonium; (B) 0.15 mass% or more and 2 mass% or less are represented by the formula (2) 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 having 8 to 22 carbon atoms, n represents an average molar number of an oxygen-extended ethyl group added from 0.5 to 12, and Y represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium Or an organic ammonium; (C) 0.1% by mass or more and 4% by mass or less of the amphoteric surfactant; (D) 0.1% by mass or more and 1.0% by mass or less of the alkyl-modified carboxyvinyl polymer And (E) 0.1% by mass or more and 10% by mass or less of the cellulose particles.

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

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

The skin detergent 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 More preferably, it is 12% by mass or more, and preferably 17% by mass or less, and more preferably 16% by mass or less.

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

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

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

The skin detergent composition according to any one of <1> to <7> wherein the content of the component (B) in the skin detergent 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 detergent 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 further preferably 56 or Above, and preferably 80 or less, more preferably 70 or less, still more preferably 68 or less, and still more preferably 65 or less component (A) to component (B) by mass ratio (A/B) .

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

The skin cleansing composition according to any one of <1> to <10> wherein the component (C) is selected from the group consisting of a betaine acetate surfactant, an amine oxide surfactant, and an imidazolinium. One or more of a betaine surfactant, a guanamine betaine surfactant, and a sulfobetaine surfactant.

<12> The skin detergent composition according to any one of <1> to <11> wherein the component (C) is selected from one or more of a guanamine betaine surfactant and a sulfobetaine surfactant.

The skin detergent composition according to any one of <1> to <12, wherein the content of the component (C) in the skin detergent composition is 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, still more preferably 1.8% by mass or less. And more preferably 1.0% by mass or less.

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

<15> The skin detergent 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, 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).

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

The skin detergent composition according to any one of <1> to <16> wherein the content of the component (D) in the skin detergent composition is 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 skin detergent composition according to any one of <1> to <17> wherein the content of the component (D) is preferably from 0.2 to 1.0% by mass, more preferably from 0.3 to 1.0% by mass, and More preferably, it is 0.5 to 1.0% by mass.

The skin detergent 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 μm, or A cellulose-containing disintegrating granule having an average particle size of from 100 to 700 μm, and more preferably a cellulose-based powder having an average particle size of from 100 to 700 μm.

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

<22> The skin detergent 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 less, more preferably 2 or less, still more preferably 1 or less, and still more preferably 0.7 or less of the component (D) to the component (E) by mass ratio (D/E) .

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

<24> A skin detergent composition according to <23>, wherein the component (F) is one or more selected from the group consisting of sugar alcohols.

<25> The skin detergent 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 more preferably 4 % by mass or more, and still more 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, still more preferably 9% by mass or less, And more preferably 8% by mass or less of the skin detergent composition The content of component (F).

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

<27> The skin detergent composition according to any one of <1> to <26> which further comprises water.

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

The skin detergent 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 a viscosity of 2,000 to 12,000 mPa.s at 30 ° C.

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

<31> The use of the detergent composition according to any one of <1> to <28> as a skin detergent composition, wherein the detergent composition is applied to the skin to clean the skin.

[Examples]

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

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

A skin cleansing agent having the compositions shown in Tables 1 and 2 was produced and evaluated for efficacy. The evaluation results are shown in Tables 1 and 2. Note that the component (A) is a fatty acid and a fatty acid salt or a fatty acid salt, but in the present invention, the content of the component (A) is the content of the acid, and thus the blending amount of the fatty acid is described as the amount of the component (A). .

(Production method)

The components (excluding potassium hydroxide) and water were mixed and heated to 70 ° C until homogeneous. Next, the desired amount of potassium hydroxide was added, and the mixture was stirred until homogeneous. Further, the mixture was cooled to room temperature (25 ° C) with stirring to obtain a skin detergent composition. A 250 gram bottle was filled with 200 grams of the obtained skin detergent composition.

(evaluation method) (1) Distributability

At 25 ° C, each of the five expert participants held the container such that the dispensing outlet side was perpendicular to the palm of the hand and three grams of the skin detergent composition was withdrawn with one gentle push. Next, the ease of taking 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 detergent.

5; good dispensability.

4; slightly better dispensability.

3; medium.

2; slightly poor assignability.

1; poor dispensability.

(2) scalability

Five expert participants each took 3 grams of each skin cleanser composition on the hand, added a small amount of water, and extended the mixture to the entire body by hand. Next, each was asked to perform an extended sensory evaluation at the time according to the five-point scale evaluation criteria shown below. Determine the average of the scores from the five participants.

5; the formulation is easy to spread evenly.

4; The formulation is slightly easier to spread evenly.

3; medium.

2; The formulation is slightly more difficult to spread evenly.

1; The formulation is difficult to spread evenly.

(3) foaming

Five expert participants each took 1 gram of each skin cleanser on the hand, added a small amount of water, and rubbed the hand 10 times together for foaming. Next, it was requested to perform a sensory evaluation of the foamability at the time according to the five-point scale evaluation standard shown below. Determine the average of the scores from the five participants.

5; good foaming.

4; slightly better foaming.

3; medium.

2; slightly poor foaming.

1; poor blistering.

(4) scrub feeling

Five expert participants each took 1 gram of each skin detergent composition onto the hand, added a small amount of water, and rubbed the hand 10 times together for foaming. Next, massage one arm 10 times while spreading the foam over the arm. Further, the hand of the other arm was placed on the one arm, and at that time, the sensory evaluation of the graininess caused by the scrubbing was performed according to the five-point scale evaluation standard shown below. Determine the average of the scores from the five participants.

5; clearly feel the particles.

4; Feel the particles.

3; slightly felt the particles.

2; do not feel the particles.

1; no particles were felt at all.

(5) rinsability

Five expert participants each took 1 gram of each skin cleanser on the hand, added a small amount of water, and rubbed the hand 10 times together for foaming. Next, massage one arm 10 times while spreading the foam over the arm. Next, rinse the foam off with tap water. Then, it is required to perform a sensory evaluation of the flushability according to the five-point scale evaluation standard shown below. Determine the average of the scores from the five participants.

5; easy to rinse off.

4; rinse off a little easily.

3; medium.

2; not easy to rinse off.

1; quite difficult to rinse off.

(6) moist feeling

Five expert participants each took 1 gram of each skin cleanser on the hand, added a small amount of water, and rubbed the hand 10 times together for foaming. Next, massage one arm 10 times while spreading the foam over the arm. Next, rinse the foam off with tap water. Then, it is required to perform a sensory evaluation of the moist feeling according to the five-point scale evaluation standard shown below after wiping the arm with a towel. Determine the average of the scores from the five participants.

5; moist.

4; slightly moist.

3; medium.

2; not too moist.

1; not wet.

(7-1) Storage stability at 10 ° C

A glass bottle having a capacity of 130 ml was filled with 100 g of each skin detergent 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 detergent were visually observed and scored according to the two-point scale evaluation standard shown below.

a; appearance, no precipitation, and fluidity.

b; Appearance, precipitation was observed, and no fluidity.

(7-2) Storage stability at 50 ° C

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

Two-point scale evaluation criteria;

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

b; water-insoluble particles are unevenly distributed, or/and liquid is separated.

*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 1.3 g/cm ³ , average particle size: 300 μm (by DIN EN ISO 4610/jet screen))

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

In Tables 1 and 2, Comparative Examples 1 and 2 each have a component (A) content outside the scope of the present invention. Comparative Examples 3 and 4 each had a degree of neutralization of component (A) outside the scope of the present invention. Comparative Example 5 has the contents of each of the components (B) and (C) outside the scope of the present invention. Comparative Example 6 is an example in which components (B) and (C) are not contained. Comparative Example 7 has a component (D) content outside the scope of the present invention. Comparative Examples 8 and 9 each had a polymer outside the scope of the present invention. At least one of the comparative examples in terms of scrubbing sensation, foamability, rinsability, dispensability from the transfer of the container, feeling of use (wet feeling), and storage stability are compared to the practice of the present invention. Examples 1 to 10 are poor. According to Examples 1 to 10 of the present invention, there was no precipitation after storage, and fluidity was excellent, and thus Examples 1 to 10 exhibited excellent dispensability upon transfer from a container.

Claims (6)

A skin detergent composition comprising the following components (A) to (E): (A) 6 mass% or more and 18 mass% or less as an acid and having a degree of neutralization of 0.85 to 1.02 (1) A fatty acid or a salt thereof: R ¹ -COOX (1) wherein R ¹ represents an alkyl group having 11 to 23 carbon atoms, and X represents a hydrogen atom, an alkali metal, an ammonium or an organic ammonium; (B) 0.15 An alkyl ether sulfate represented by the formula (2): R ² -O-(CH ₂ CH ₂ O) _n -SO ₃ Y (2) wherein R ² represents 8 or more and 2% by mass or less To an alkyl or alkenyl group of 22 carbon atoms, n represents the average number of moles of the oxygen-extended ethyl group added from 0.5 to 12, and Y represents a hydrogen atom, an alkali metal, an alkaline earth metal, an ammonium or an organic ammonium; (2) 0.1% by mass or more and 4% by mass or less of the amphoteric surfactant; (D) 0.1% by mass or more and 1.0% by mass or less of the alkyl-modified carboxyvinyl polymer; and (E) 0.1 Cellulose particles of % by mass or more and 10% by mass or less. The skin detergent composition of claim 1, which has a viscosity of 300 mPa.s or more and 18,000 mPa.s or less at 30 °C. The skin detergent composition according to claim 1 or 2, which has a total content of the component (B) and the component (C) of 0.3% by mass or more and 6% by mass or less. A skin detergent composition according to claim 1 or 2 which has a mass ratio (A/B) of component (A) to component (B) of 5 or more and 80 or less. The skin cleansing composition of claim 1 or 2, which has a ratio of 0.025 or more The mass-to-content ratio (D/E) of component (D) to component (E) of 3.3 or less. The skin detergent composition of claim 1 or 2, which further comprises component (F) which is a polyol.