JP5885938B2 - Body wash cosmetics - Google Patents

Description

  The present invention relates to a composition used for a body wash cosmetic.

  In the industrial field, various body cleaning cosmetics containing a surfactant and an abrasive such as scrub particles are used to remove strong dirt such as cutting oil and grease. For example, there are body washing cosmetics disclosed in Patent Documents 1 to 4.

  Patent Document 1 discloses a cleaning composition containing an organic abrasive and describes that dirt can be cleaned.

  Patent Document 2 discloses a cleaning composition containing an abrasive made of a biodegradable plastic, and describes that it is non-polluting.

  Patent Document 3 discloses a cleaning composition containing a terpene hydrocarbon (alcohol), an abrasive, and a fatty acid salt, and describes that the cleaning property is excellent and the irritation to skin is small.

  Patent Document 4 discloses a detergent composition containing Na · Mg · Silicate and an anionic surfactant, and describes that the feeling of use is high.

Japanese Patent Laid-Open No. 2-80497 JP-A-4-331294 JP-A-7-126152 JP 2007-146094 A

However, conventionally used cosmetics for body washing have a problem of poor rinsing properties such as a slimy feeling when rinsed with water, and there has been a problem that the user's satisfaction cannot be sufficiently obtained.
An object of the present invention is to provide a composition for use in a body wash cosmetic that has a low sliminess when rinsed with water, has a good rinsing property, and has a good feel when used.

  As a result of intensive studies to solve such problems, the present inventor reduced the slimy feeling during washing and improved rinsing properties by blending a specific thickener and a specific surfactant. As a result, the present invention has been completed.

That is, the present invention is as described below.
[1] A copolymer of (meth) acrylic acid represented by the following formula (a) and (meth) acrylic acid ester represented by the following formula (b), a biodegradable abrasive, and a non-oxygen containing polyoxypropylene group A composition containing an ionic surfactant.

（式（ａ）中のＲ^１は水素原子、又はメチル基を表す。）

(R ¹ in the formula (a) represents a hydrogen atom or a methyl group.)

（式（ｂ）中のＲ^２は水素原子、又はメチル基を表し、Ｒ^３はアルキル基を表す。）

(R ² in the formula (b) represents a hydrogen atom or a methyl group, and R ³ represents an alkyl group.)

[2] The composition as described in [1] above, wherein R ^{3 of the} (meth) acrylic acid ester represented by the formula (b) is an alkyl group having 10 to 30 carbon atoms.
[3] 0.1 to 5 parts by mass of the copolymer, 1 to 20 parts by mass of a biodegradable abrasive, and 1 to 50 parts by mass of a nonionic surfactant having a polyoxypropylene group. The composition according to [1] or [2] above, wherein
[4] The composition according to any one of [1] to [3] above, wherein the biodegradable abrasive has an average particle size in the range of 1 to 500 μm.
[5] Any of the above [1] to [4], wherein the biodegradable abrasive is a chemically synthesized polymer selected from polybutylene succinate, polybutylene succinate adipate or polylactic acid particles. A composition according to claim 1.
[6] The composition as described in any one of [1] to [5] above, which contains a neutralizing agent.
[7] A body wash cosmetic comprising the composition according to any one of [1] to [6] above.
[8] A cosmetic for washing hands comprising the composition according to any one of [1] to [6].

  According to the present invention, a slimy feeling at the time of washing is reduced, and a composition having a high rinsing property and a high feeling of use, and a body washing cosmetic are obtained.

The present invention will be specifically described below. The present invention is a composition containing a specific copolymer, a biodegradable abrasive, and a specific surfactant.
The present invention includes a copolymer obtained by polymerizing a monomer mixture containing (meth) acrylic acid represented by the following formula (a) and (meth) acrylic acid ester represented by the following formula (b).

（式（ａ）中のＲ^１は水素原子、又はメチル基を表す。）

(R ¹ in the formula (a) represents a hydrogen atom or a methyl group.)

（式（ｂ）中のＲ^２は水素原子、又はメチル基を表し、Ｒ^３はアルキル基を表す。）

(R ² in the formula (b) represents a hydrogen atom or a methyl group, and R ³ represents an alkyl group.)

Specific examples of the copolymer include the following.
(Meth) acrylic acid / (meth) acrylic acid hexyl copolymer, (meth) acrylic acid / (meth) acrylic acid octyl copolymer, (meth) acrylic acid / (meth) acrylic acid decyl copolymer, (meta ) Acrylic acid / (meth) acrylic acid dodecyl copolymer, (meth) acrylic acid / (meth) acrylic acid tetradecyl copolymer, (meth) acrylic acid / (meth) acrylic acid hexadecyl copolymer, (meth) acrylic Acid / (meth) acrylic acid octadecyl copolymer, (meth) acrylic acid / (meth) acrylic acid eicosyl copolymer, (meth) acrylic acid / (meth) acrylic acid docosyl copolymer, (meth) acrylic acid / (Meth) acrylic acid tetracosyl copolymer, (meth) acrylic acid / (meth) acrylic acid hexacosyl copolymer, (meth) acrylic acid / (meth) acrylic acid octacosyl copolymer, (meth) acrylic acid / Examples include (meth) acrylic acid triacontyl copolymer, (meth) acrylic acid / (meth) acrylic acid dotriacontyl copolymer, (meth) acrylic acid / (meth) acrylic acid tetraacontyl copolymer, and the like.

In addition, Carbopol (1342), Carbopol (1382), Carbopol (ETD2020), Ultrez21, Ultrez20, PEMULEN (TR1), PEMULEN (TR2), Sumitomo Seika Co., Ltd., AQUPEC (HV-701UPR), manufactured by Lubrizol. -501ER), AQUPEC (HV-501EM), and the like can be used. In the copolymer of the present invention, the (meth) acrylic acid represented by the formula (a) has an OH group as a hydrophilic group, and the (meth) acrylic acid ester represented by the following formula (b) is represented by OR ³ as a hydrophobic group. Has a very high balance between hydrophilicity and hydrophobicity.

Further, the copolymer in the present invention, R ³ in the above formula (b) is preferably an alkyl group having 10 to 30 carbon atoms. If it is 10 or more, the viscosity is sufficiently increased. If it is 30 or less, sufficient water solubility can be secured. In addition, storage stability is improved.

  The present invention contains a biodegradable abrasive. Specific biodegradable abrasives include the following.

  For natural materials, walnut shells, corn cobs, apricot kernels, etc. can be used. Chemically synthesized polymers include polyhydroxybutyrate, poly (hydroxybutyrate / hydroxyhexanoate), esterified starch, cellulose acetate, chitosan / cellulose / starch mixture particles, polybutylene succinate particles, polybutylene succinate adipate Particles, polylactic acid particles, polyethylene succinate particles, polycaprolactone resin particles, polyglycolic acid particles, polytetramethylene adipate co-terephthalate particles, polybutylene adipate terephthalate particles, polybutylene succinate co-adipate co-terephthalate Particles, polybutylene succinate carbonate particles, polybutylene succinate terephthalate particles and the like can be used.

  In the present invention, the biodegradable abrasive is preferably environmentally friendly and has an appropriate hardness that does not damage the skin.

  As the biodegradable abrasive, a chemically synthesized polymer is preferable in that the particle size distribution and the particle shape are uniform and the skin is hardly damaged. More preferably, it is one or more selected from particles of polybutylene succinate, polybutylene succinate adipate or polylactic acid. The touch is improved by the specific biodegradable abrasive and the copolymer of the present invention. More preferably, polylactic acid is used.

  The present invention contains a nonionic surfactant having a polyoxypropylene group as a hydrophilic group. Nonionic surfactants have low irritation to the skin and high detergency. And since it is a nonionic surfactant which has a polyoxypropylene group as a hydrophilic group, the affinity with the copolymer in this invention is high, and a detergency and a rinse property improve.

  Examples of the nonionic surfactant having a polyoxypropylene group include polyoxyethylene polyoxypropylene propyl heptyl ether, polyoxyethylene polyoxypropylene butyl ether, polyoxyethylene polyoxypropylene cetyl ether, polyoxyethylene polyoxypropylene decyl tetra Examples include decyl ether, polyoxyethylene polyoxypropylene glyceryl ether, and polyoxyethylene polyoxypropylene glycol.

  In particular, polyoxyethylene polyoxypropylene propyl heptyl ether has a polyoxypropylene group as a hydrophilic group and also has a branched hydrophobic group. Therefore, the copolymer in the present invention has both a hydrophobic group and a hydrophilic group. The affinity with the polymer is higher, and the washing and rinsing properties are dramatically improved.

  In the present invention, the pH is preferably adjusted to a range of 5.5 to 9.5, more preferably 6.5 to 8.5, from the viewpoint of irritation to the skin.

  Moreover, it is preferable that this invention contains a neutralizing agent. Specific examples of the neutralizing agent include inorganic substances such as Na hydroxide, K hydroxide, and aqueous ammonia, and organic amines such as trimethylamine, diethanolamine, diethylamine, and triethanolamine.

  From the viewpoint of storage stability of the body wash cosmetic, Na hydroxide and triethanolamine are preferred. More preferably, it is triethanolamine. When triethanolamine is used, the refreshing feeling when used is remarkably improved by the synergistic effect of the copolymer and the neutralizing agent in the present invention.

  In the composition of the present invention, it is preferable that each component has the following content, particularly in that a good feel to the skin can be obtained. It is preferable that 0.1-5 mass parts of copolymers are included. More preferably, it is 0.1-1 mass part.

  The biodegradable abrasive preferably contains 1 to 20 parts by mass. In addition, it is preferable that an average particle diameter is the range of 1-500 micrometers.

  The nonionic surfactant having a polyoxypropylene group is preferably 1 to 50 parts by mass from the viewpoint of obtaining a good feel. More preferably, it is 5 to 20 parts by weight.

  The neutralizing agent preferably contains 0.1 to 5 parts by mass. More preferably, it is 0.2-1 mass part.

  In the present invention, the viscosity is preferably 2000 to 20000 mPa · s. If a viscosity is 20000 mPa * s or less, the discharge property from a container pump is enough. In particular, even when the winter temperature decreases, the fluidity does not decrease. On the other hand, if it is 2000 mPa * s or more, the stable suspension state of a biodegradable abrasive | polishing agent will be maintained. More preferably, it is 3500 mPa · s to 6000 mPa · s. In the present invention, the viscosity is measured at 25 ° C. with a No. 4 rotor and 60 rpm using a B-type viscometer.

  The composition of the present invention has a high rinsing property and good feel, and is suitable as a composition for body washing. For body washing, it can be used for washing hands, feet, torso, face, head, but is more suitable for washing strong dirt such as oil, rust, carbon, etc. adhering to fingers. is there.

  The present invention may contain additives that are usually used within a range that does not impair the effects of the invention. Specific examples include the following.

The following can be mention | raise | lifted as a cationic surfactant.
In the ammonium system, alkyltrimethylammonium chloride, alkyldimethylbenzylammonium chloride, dialkyldimethylammonium chloride, alkyltrimethylammonium bromide, alkylpentaethoxyammonium chloride, ethyl lanolin sulfate fatty acid aminopropylethyldimethylammonium, cationized cellulose, etc. may be used. it can.

In the amide system, acyldiethylaminoethylamide, acyldimethylaminopropylamide, polyoxyethylene fatty acid amide and the like can be used.
In other cases, myristyldimethylamine oxide or the like can be used.

Examples of amphoteric surfactants include the following.
In the betaine system, alkyldimethylaminoacetic acid betaine having a fatty acid residue having 13 or more carbon atoms, acylamidopropyldimethylaminoacetic acid betaine, and the like can be used.

In the imidazolinium series, N-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, N-alkyl-N-carboxymethyl-N-hydroxyethylethylenediamine / lauryl sulfate, and salts thereof can be used. .
In the glycine type, polyoctyl polyaminoethylglycine or the like can be used.
In the aminopropionic acid type, alkylaminopropionic acid, alkylaminodipropionic acid and the like can be used.

Examples of the anionic surfactant include the following.
As the soap, sodium soap having 17 or less carbon atoms can be used.
In the amino acid system, acyl sarcosine and a salt thereof, an acyl amino acid and a salt thereof, an acylated peptide and a salt thereof in which the fatty acid residue has 17 or less carbon atoms can be used.

  In the polyoxyalkylene adduct, polyoxyethylene alkyl ether carboxylic acid and its salt, polyoxyethylene alkyl ether sulfuric acid and its salt, polyoxyethylene alkyl ether sulfonic acid and its salt and the like can be used.

In the phosphoric acid system, alkyl phosphoric acid and its potassium salt or alkanolamine salt, polyoxyethylene alkyl ether phosphoric acid and its salt, and the like can be used.
In the sulfosuccinic acid system, dialkyl sulfosuccinate and its salt, polyoxyethylene sulfosuccinic acid alkyl ether and its salt and the like can be used.

  In the alkylphenol type, alkylphenol ether phosphates and salts thereof can be used.

Other nonionic surfactants include the following.
For polyoxyalkylene ethers, polyoxyethylene sorbite beeswax, polyoxyethylene castor oil, polyoxyethylene sterol, polyoxyethylene hydrogenated sterol, polyoxyethylene lanolin, polyoxyethylene lanolin alcohol, polyoxyethylene alkylphenyl formaldehyde condensate Etc. can be used.
As the phospholipid, lecithin and the like can be used.

  In the ester system, propylene glycol fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester having a fatty acid residue of 17 or less, fatty acid residue Polyoxyethylene sorbite fatty acid ester and polyethylene glycol fatty acid ester which are saturated carbon chains can be used.

  Powder components such as calcium carbonate, talc, mica, kaolin, lauroyl lysine, titanium dioxide, zinc dioxide;

  Jojoba oil, macadamia nut oil, avocado oil, evening primrose oil, mink oil, rapeseed oil, castor oil, sunflower oil, corn oil, cacao oil, palm oil, rice bran oil, olive oil, almond oil, sesame oil, safflower oil, soybean oil, Persimmon oil, persic oil, castor oil, mink oil, cottonseed oil, mole oil, palm oil, palm kernel oil, egg yolk oil, lanolin, squalene, and other natural animal and vegetable oils and fats, synthetic triglycerides;

Hydrocarbons such as squalane, liquid paraffin, petrolatum, ceresin, microcrystalline wax, isoparaffin;
Waxes such as carnauba wax, paraffin wax, whale wax, beeswax, chiyandelilla wax, lanolin;

  Higher alcohols such as cetanol, stearyl alcohol, lauryl alcohol, cetostearyl alcohol, oleyl alcohol, behenyl alcohol, lanolin alcohol, hydrogenated lanolin alcohol, hexyl decanol, octyldodecanol;

Higher fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, isostearic acid, oleic acid, linolenic acid, linoleic acid, oxystearic acid, undecylenic acid, lanolin fatty acid, hard lanolin fatty acid, soft lanolin fatty acid;
Cholesterol such as cholesteryl-octyldodecyl-behenyl and derivatives thereof;
Esters such as isopropyl myristic acid, isopropyl palmitic acid, isopropyl stearic acid, glycerol 2-ethylhexanoate, butyl stearic acid, ethyl linoleate;

  Polar oils such as diethylene glycol monopropyl ether, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxypropylene butyl ether;

  Others: methylphenylpolysiloxane, methylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, methylcyclopolysiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, polyoxyethylene / methylpoly Siloxane copolymer, polyoxypropylene / methylpolysiloxane copolymer, poly (oxyethylene / oxypropylene) methylpolysiloxane copolymer, methylhydrogenpolysiloxane, tetrahydrotetramethylcyclotetrasiloxane, stearoxymethylpolysiloxane, Cetoxymethylpolysiloxane, methylpolysiloxane emulsion, highly polymerized methylpolysiloxane (1) and (2), trimethylsiloxy Silicic acid, cross-linked methylpolysiloxane, cross-linked methylphenyl polysiloxane, cross-linked methylphenyl polysiloxane, cross-linked methylphenyl polysiloxane (2), etc., amino-modified silicone, epoxy-modified silicone, carboxyl-modified silicone, carbinol Modified silicone, methacryl-modified silicone, mercapto-modified silicone, phenol-modified silicone, one-end reactive silicone, different functional group-modified silicone, polyether-modified silicone, methylstyryl-modified silicone, alkyl-modified silicone, higher fatty acid ester-modified silicone, hydrophilic special Silicones containing various derivatives such as modified silicones, higher alkoxy-modified silicones, higher fatty acid-containing silicones, fluorine-modified silicones;

  Paraaminobenzoic acid and its derivatives, homomethyl-7N-acetylaranthranilate, butylmethoxybenzoylmethane, di-paramethoxycinnamic acid-mono-2-ethylhexanoic acid glyceryl, octylcinnamate and other paramethoxycinnamic acid derivatives, amyl salicylate, etc. UV absorbers such as salicylic acid derivatives of 2, benzophenone derivatives such as 2,4-dihydroxybenzophenone, ethyl hexyl dimethoxybenzylidene dioxoimidazoline propionate, lanolin acetate liquid extract, coganebana root extract, trianilino-p-carboethylhexyloxy-triazine;

  Ascorbic acid and its derivatives such as arbutin, kojic acid, magnesium ascorbate phosphate, glutathione, licorice extract, clove extract, tea extract, astaxanthin, cow placenta extract, tocopherol and its derivatives, tranexamic acid and its salts, azulene, γ -Whitening ingredients such as hydroxybutyric acid;

  Maltitol, sorbitol, glycerin, propylene glycol, 1,3-butylene glycol, polyhydric alcohols such as polyethylene glycol, glycol, organic acids such as pyrrolidone carboxylic acid soda, sodium lactate and sodium citrate, and salts thereof, hyaluronic acid such as sodium hyaluronate Acids and salts thereof, yeast and yeast extract hydrolysates, yeast culture fluid, fermentation metabolites such as lactic acid bacteria culture fluid, collagen, elastin, keratin, sericin and other water soluble proteins, collagen hydrolysates, casein hydrolysates, Silk hydrolyzate, peptides such as sodium polyaspartate and salts thereof, trehalose, xylobiose, maltose, raffinose, melibiose, sucrose, glucose, saccharides such as vegetable viscous polysaccharides, crystalline cellulose, amorphous cellulose Polysaccharides such as xylan, mannan, galactan, arabinan, arabinoxylan and their derivatives, glycosaminoglycans and their salts such as water-soluble chitin, chitosan, pectin, chondroitin sulfate and their salts, glycine, serine, threonine, alanine, aspartic acid , Tyrosine, valine, leucine, arginine, glutamine, amino acids such as prophosphoric acid, sugar amino acid compounds such as aminocarbonyl reactants, plant extracts such as aloe, maronier, trimethylglycine, urea, uric acid, ammonia, lecithin, lanolin, squalane Humectants such as nucleic acid-related substances such as squalene, glucosamine, creatinine, DNA, RNA;

  Carboxymethylcellulose, hydroxyethylcellulose hydroxypropyltrimethylammonium chloride ether, ethylcellulose, hydroxypropylcellulose, methylhydroxypropylcellulose, starch, soluble starch, carboxymethyl starch, methyl starch, propylene glycol alginate, methylcellulose, gum arabic, xanthan gum, guar gum, locust Bingham, quince seed, carrageenan, galactan, pectin, mannan, dextran, succinoglucan, curdlan, gelatin, casein, albumin, collagen, methoxyethylene maleic anhydride copolymer, polydimethylmethylenepiperidinium chloride, polyvinyl acetate , Polyvinyl alcohol, polyvinyl pyro Don, polyvinyl methyl ether, carboxy vinyl polymer, nitrocellulose, polyethylene glycol fatty acid ester, polyoxyethylene fatty acid ester such as polyethylene glycol distearate, polyoxyethylene fatty acid ester methyl glycoside such as polyoxyethylene dioleic acid methyl glucoside, etc. Sticky;

  Metal ion sequestering agents such as ethylenediaminetetraacetic acid and its salts, hydroxyethylenediaminetriacetic acid and its salts, phosphoric acid, ascorbic acid, succinic acid, gluconic acid, polyphosphates, metaphosphates; ethanol, propylene glycol, 1,3- Organic solvents such as butylene glycol, antioxidants such as butylhydroxytoluene, tocopherol and phytic acid;

Benzoic acid and its salt, Salicylic acid and its salt, Sorbic acid and its salt, Paraoxybenzoic acid alkyl ester (Ethylparaben, Butylparaben etc.) and its salt, Dehydroacetic acid and its salts, Parachlorometacresol, Hexachlorophene, Boric acid , Resorcinol, tribromosaran, orthophenylphenol, chlorhexidine gluconate, thiram, photosensitizer 201, phenoxyethanol, benzethonium chloride, halocarban, chlorhexidine chloride, trichlorocarbanide, tocopherol acetate, zinc pyrithione, hinokitiol, phenol, isopropylmethylphenol, Antibacterial and antiseptic agents such as 2,4,4-trichloro-2-hydroxyphenol and hexachlorophene;
Organic acids such as citric acid, malic acid, tartaric acid, lactic acid, adipic acid, glutamic acid, aspartic acid, maleic acid; vitamin A and its derivatives; vitamin B6 hydrochloride, vitamin B6 tripalmitate, vitamin B6 dioctanoate, vitamin B2 and the like Vitamins B such as derivatives;

  Vitamins C such as ascorbic acid, ascorbic acid sulfate, ascorbic acid phosphate, vitamin E such as α-tocopherol, β-tocopherol, γ-tocopherol, vitamins such as vitamin D, vitamin H, pantothenic acid;

  Nicotinamide, benzyl nicotinate, γ-oryzanol, allantoin, glycyrrhizic acid (salt) glycyrrhetinic acid and its derivatives, hinokitiol, mucidin, bisabolol, eucalyptol, thymolinositol, saponins (Quillajasaponin, azoxaponin, hetimasaponin ) Blood circulation promoters such as tranexamic acid, pantothel ethyl ether, ethinyl estradiol, cephalanthin, placenta extract, assembly extract, cephalanthin, vitamin E and its derivatives, gamma oryzanol;

  Local irritants such as pepper tincture, ginger tincture, cantharis tincture, benzyl nicotinate, nutrients such as various vitamins and amino acids, glycyrrhetinic acid, glycyrrhizic acid derivatives, allantoin, azulene, aminocaproic acid, hydrocortisone and other anti-inflammatory agents Astringents such as zinc oxide, zinc sulfate, allantoin hydroxyaluminum, aluminum chloride, zinc sulfocolate, tannic acid;

Refreshing agents such as menthol and camphor;
Antihistamines;
Various drugs such as antioxidants such as tocopherols, BHA, BHT, gallic acid and NDGA;

  Saccharomyces yeasts, filamentous fungi, bacteria, bovine placenta, human placenta, human umbilical cord, yeast, bovine collagen, milk-derived protein, wheat, soybean, cow blood, pig blood, chicken crown, chamomile, cucumber, rice, shea butter, birch , Tea, tomato, garlic, hamamelis, rose, loofah, hop, peach, apricot, lemon, kiwi, dokudami, capsicum, clara, scallop, kohone, sage, sawtooth grass, mallow, senkyu, assembly, thyme, spruce, spruce, Birch, Horsetail, Loofah, Maronie, Yukinosita, Arnica, Lily, Mugwort, Peonies, Aloe, Aloe Vera, Ogon, Owaku, Mukai, Safflower, Sanshin, Shikon, Tycho, Chimpi, Carrot, Yokuinin, Barley, Gardenia, Sawara, etc.・ Present from microorganisms and parts thereof It can be blended purified water and the like; solvent, alcohols, polyhydric alcohols, water, natural extracts obtained by extraction or hydrolysis in aqueous alcohol; dyes; perfume.

  Among these, the combined use with the powder component is effective by increasing the cleaning power by a physical friction effect and adsorbing dirt on the particle surface.

  Further, the combined use with the oil component is suitable for improving the detergency because it has the effect of solubilizing the oily dirt due to the solvent effect of the oil component. Among oil components, the combined use with silicones is particularly effective for giving a refreshing feel after use.

  Furthermore, using a moisturizing agent together can prevent rough skin due to excessive degreasing, and contributes to an improved feeling of use.

  The combined use with a sequestering agent, an antioxidant, and an antiseptic is effective in preventing changes in the product under long-term or severe use conditions and providing a good feeling of use.

  EXAMPLES Next, although an Example demonstrates this invention still in detail, this invention is not limited at all by this.

[Production Examples 1 to 6]
R ³ (alkyl) of (meth) acrylic acid ester represented by formula (b) with reference to Examples of Patent Document 6 (Japanese Patent Laid-Open No. 51-6190) and Patent Document 7 (International Publication WO2007 / 058143 pamphlet) Copolymers A to F having different numbers of carbon atoms of the group) were obtained. Table 1 shows the number of carbon atoms of R ³ of the copolymer. Specifically, a copolymer was produced in the following manner.

  A series of batch polymerizations of acrylic acid and alkyl acrylate were conducted in benzene at 65 ° C. using capryl peroxide as an initiator. The reaction was carried out in a glass container under dry nitrogen. A polymer insoluble in benzene was separated by centrifugation and dried in a vacuum oven at 55 ° C. to obtain a copolymer.

[sensory evaluation]
With the compositions obtained in Examples 1 to 11 and Comparative Examples 1 to 5 which will be described later, 10 panelists performed hand washing, and the feeling of the abrasive during hand washing and the rinsing properties when washing with water were evaluated. . The evaluation criteria are as follows.

“Composition Evaluation Criteria”
3 points: Good touch.
2 points: Slightly good touch.
1 point: Slightly bad feel.
0 point: The touch is bad.

"Rinsability evaluation criteria"
3 points: Good rinsing properties.
2 points: Easy to pass.
1 point: Poor ease.
0 point: The rinsing property is poor.

  The average value of the scores evaluated by 10 panelists based on the above evaluation criteria is obtained.

[Examples and Reference Examples 1 to 7]
The composition shown in Table 2 which mix | blended copolymer AF was obtained. The pH is 7.0 and the viscosity is 5000 mPa · s. Table 2 shows the results of sensory evaluation using the obtained composition.

[Comparative Examples 1-3]
In Comparative Examples 1-3, Carbopol 941 was used in Comparative Example 1, Carbopol 980 was used in Comparative Example 2, and AQUPEC (HV-505E) was used in Comparative Example 3, instead of Copolymer A used in Example 1. Except for this, a composition was obtained in the same manner as in Example 1. Table 2 shows the results of sensory evaluation using the obtained composition.
The thickener used in Comparative Examples 1 to 3 is not a copolymer obtained by copolymerizing the formula (a) and the formula (b), but a polymer having only the formula (a).

In addition, the unit of the numerical value of a composition in Table 2 is a mass part.
When Examples and Reference Examples 1 to 4 are compared with Comparative Examples 1 to 3, it can be seen that the composition using the copolymer of the present invention has a much higher rinsing property. In Examples carbon number of ^{R 3} is using the copolymer B~E 10-30 2,3,5 (Reference Example) 6 (reference example) has a carbon number of ^{R 3} is not 10-30 It can be seen that the rinsing properties are higher than those of Examples (Reference Examples) 1, 4, and 7 using the copolymers A and F.

[Examples 8 to 11, Comparative Examples 4 to 5]
Compositions were obtained with the compositions shown in Table 3. The pH is 7.0 and the viscosity is 5000 mPa · s. Table 3 shows the results of sensory evaluation using the obtained composition.

In addition, the unit of the numerical value of a composition in Table 3 is a mass part.
When Examples 8 to 11 and Comparative Examples 4 to 5 are compared, a composition using a nonionic surfactant having a polyoxypropylene group is a composition using other nonionic surfactants. It can be seen that the rinsing property is very high compared to.

  Further, Examples 8 and 9 using polyoxyethylene polyoxypropylene propyl heptyl ether as the surfactant were used in Examples 10 and 11 using polyoxyethylene polyoxypropylene cetyl ether as the surfactant. On the other hand, it can be seen that the rinsing property is high.

  The composition of the present invention can be suitably used for cleaning stubborn dirt such as cutting oil, grease having high viscosity, sebum adhering to the human body, soil dirt, carbon black and the like.

Claims (6)

A copolymer of (meth) acrylic acid represented by the following formula (a) and a (meth) acrylic acid ester represented by the following formula (b), a biodegradable abrasive, polyoxyethylene polyoxypropylene propylheptyl ether , A body wash cosmetic composition comprising a composition comprising:

(R ¹ in the formula (a) represents a hydrogen atom or a methyl group.)

(R ² in the formula (b) represents a hydrogen atom or a methyl group, and R ³ represents an alkyl group having 10 to 30 carbon atoms.) In the composition, 0.1-5 parts by mass of the copolymer,
1 to 20 parts by mass of the biodegradable abrasive,
The body wash cosmetic according to claim 1, wherein the polyoxyethylene polyoxypropylene propyl heptyl ether is contained in an amount of 1 to 50 parts by mass.   The body cleaning cosmetic according to claim 1 or 2, wherein the biodegradable abrasive has an average particle size in the range of 1 to 500 µm.   The biodegradable abrasive is a chemically synthesized polymer selected from polybutylene succinate, polybutylene succinate adipate, and polylactic acid particles. Cosmetics for body washing.   The body washing cosmetic according to any one of claims 1 to 4, further comprising a neutralizing agent.   The cosmetic for body washing according to any one of claims 1 to 5, which is used for hand washing.