JP2006321727A - Hair cosmetic composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance transparent appearances without detriment to a thickening property, setting force and other functions of a hair cosmetic composition comprising (a) a polyvinylpyrrolidone and/or a vinylpyrrolidone/vinyl acetate copolymer and (b) an anionic thickener. <P>SOLUTION: The hair cosmetic composition comprises, in addition to (a) and (b), (c) a cationic polymer, for example, a vinylpyrrolidone/dialkylaminoalkyl methacrylate salt copolymer or a vinylpyrrolidone/dialkylaminoalkyl methacrylate/dialkylaminoalkyl methacrylate salt copolymer, having a weight-average molecular weight of at most 200,000. A carboxyvinyl polymer is suitable as the anionic thickening agent. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cosmetic composition for hair.

  Conventionally, as a cosmetic composition for hair, for example, a combination of an anionic thickener such as carboxyvinyl polymer and a nonionic film forming agent such as polyvinylpyrrolidone or vinylpyrrolidone / vinyl acetate copolymer is used. Hair cosmetics that are transparent and beautiful are used (see Patent Documents 1 and 2 below).

Recently, a cationic thickener has also been developed in order to use an ionic film-forming agent (see Non-Patent Document 1). Accordingly, a gel-like hair cosmetic using a cationic film forming agent such as vinylpyrrolidone / N, N-dimethylaminoethyl methacrylate copolymer diethyl sulfate has been developed.
Japanese Patent Laid-Open No. 10-87448 JP 2000-34212 A Yujiro Uchiyama, “New Cationic Thickener”, FRAGRANCE JOURNAL, 1999, No. 1, p. 101-108

  However, the cationic thickener has an insufficient thickening effect compared to the case where an anionic thickener such as carboxyvinyl polymer is used. On the other hand, when an anionic thickener is used, even when combined with non-ionic polyvinyl pyrrolidone or vinyl pyrrolidone / vinyl acetate copolymer as described above, it is sufficient that these act as pseudo cations. There is a problem that it is not possible to obtain high transparency.

  The present invention has been made in view of the above points, and is a cosmetic for hair comprising a combination of a nonionic film forming agent comprising polyvinylpyrrolidone or a vinylpyrrolidone / vinyl acetate copolymer and an anionic thickener. In the composition, it is an object to increase the transparency of the appearance without impairing functions such as thickening and setting force.

  The cosmetic composition for hair according to the present invention that solves the above problems is a) polyvinyl pyrrolidone and / or vinyl pyrrolidone / vinyl acetate copolymer, b) anionic thickener, and c) weight average molecular weight. It contains 10,000 or less cationic polymers.

  According to the present invention, in the cosmetic composition for hair using polyvinyl pyrrolidone and / or vinyl pyrrolidone / vinyl acetate copolymer as a film forming agent and combining this with an anionic thickener, the above-mentioned specific weight average By blending a low molecular weight cationic polymer having a molecular weight, the cationic polymer can be preferentially complexed with the anionic thickener, and thus functions such as thickening and setting force can be achieved. The transparency of the appearance can be increased without loss.

  Hereinafter, matters related to the implementation of the present invention will be described in detail.

a component :
In the composition of the present invention, the component a polyvinyl pyrrolidone and vinyl pyrrolidone / vinyl acetate copolymer are used as the film forming agent, and these may be used alone or in combination. The polymerization ratio of vinylpyrrolidone and vinyl acetate in the vinylpyrrolidone / vinyl acetate copolymer is not particularly limited as long as the copolymer is in a water-soluble range.

  The molecular weight of the component a is not particularly limited as long as it has a film-forming ability, but preferably has a weight average molecular weight of 50,000 to 1,200,000, more preferably 500,000 to 1,000,000. Two or more types having different molecular weights can be used in combination.

  Although the compounding quantity of a component is not specifically limited, From the point of usability and functionality, Preferably it is 0.1 to 10 weight% in a whole composition, More preferably, it is 0.5 to 5 weight%.

b component :
In the composition of the present invention, examples of the anionic thickener used as the component b include carboxymethyl cellulose, sodium polyacrylate, carboxyvinyl polymer, alkyl-modified carboxyvinyl polymer, and the like. Among these, carboxyvinyl polymer, alkyl A modified carboxyvinyl polymer is mentioned as preferred, and a carboxyvinyl polymer is particularly preferred from the viewpoint of thickening.

  Carboxyvinyl polymer is a copolymer obtained by crosslinking acrylic acid mainly with a small amount of allyl sucrose, and has a property of increasing viscosity by alkali neutralization. The carboxyvinyl polymer is commercially available as “Carbopol” series (manufactured by Noveon, USA), “Hibiswaco” (manufactured by Wako Pure Chemical Industries, Ltd.), etc., and is commercially available. Examples of the alkali agent for neutralization include triethanolamine, aminomethylpropanol, ammonia, sodium hydroxide and the like.

  It is preferable that the compounding quantity of the anionic thickener which is b component is about 0.1 to 2 weight% in all the compositions.

c component :
The cationic polymer used as component c in the composition of the present invention includes vinylpyrrolidone / dialkylaminoalkyl methacrylate copolymer, vinylpyrrolidone / dialkylaminoalkyl methacrylate / dialkylaminoalkyl methacrylate copolymer. , Vinylpyrrolidone / dialkylaminoalkyl acrylate copolymer, vinylpyrrolidone / dialkylaminoalkyl acrylate / dialkylaminoalkyl acrylate copolymer, polydimethyldiallylammonium halide (eg, chloride), acrylamide / diallyldimethylammonium halide ( For example, chloride) copolymer, polymethacrylamidopropyltrimethylammonium halide (eg, chloride), acrylamide / methacryloyloxyethyl Limethylammonium halide (eg, chloride) copolymer, vinyl pyrrolidone / vinyl imidazolinium methyl halide (eg, chloride) copolymer, polymethacryloyloxyethyl phosphorylcholine, methacryloyloxyethyl phosphorylcholine / alkyl methacrylate copolymer, cationized hydrolysis Collagen, cationized hydrolyzed keratin and the like can be mentioned, and these may be used alone or in combination of two or more.

  These cationic polymers are more cationic than the pseudo-cation a component polyvinyl pyrrolidone or vinyl pyrrolidone / vinyl acetate copolymer, and therefore, the cationic polymer is preferentially combined with the b component anionic thickener. Form. And since the cationic polymer of component c has a low molecular weight as described above, the solubility is not impaired. Therefore, the addition of the component c can suppress the formation of a complex between the component a and the component b acting as a pseudo cation, and improve the transparency. In order to exert such action, the cationic polymer of component c needs to have a weight average molecular weight of 200,000 or less, more preferably 150,000 or less. When the weight average molecular weight exceeds 200,000, the generated complex is insolubilized and the transparency is impaired. The lower limit of the weight average molecular weight is not particularly limited, but is preferably 1000 or more.

  About the compounding quantity of the cationic polymer which is c component, the compounding ratio with the anionic thickener which is b component is anionic thickener / cationic polymer = 10/1-1/10 (weight ratio). ) Is preferable. When this ratio is larger than 10/1, the amount of the cationic polymer is too small, and there is no effect of improving the transparency. Conversely, when the ratio is smaller than 1/10, the ionic component in the system is reduced. It will increase and reduce the thickening effect of the anionic thickener.

  Examples of the cationic polymer of component c include (c-1) vinylpyrrolidone / dialkylaminoalkyl methacrylate copolymer and (c-2) vinylpyrrolidone / dialkylaminoalkyl methacrylate / dialkylaminoalkyl. A methacrylate copolymer is preferred from the viewpoint of compatibility. These copolymers may be those obtained by copolymerizing N-vinyl-2-pyrrolidone and N, N-dialkylaminoalkylmethacrylic acid, and then neutralizing with an acidic substance to be cationized. N-vinyl-2-pyrrolidone and N, N-dialkylaminoalkyl methacrylate, or N-vinyl-2-pyrrolidone and N, N-dialkylaminoalkyl methacrylate and N, N-dialkylaminoalkyl methacrylate It may be obtained by copolymerization. In the former case, c-1 is obtained when completely neutralized, and c-2 is obtained when partially neutralized. Examples of the acidic substance for forming a salt with dialkylaminoalkyl methacrylic acid include diethyl sulfate, dimethyl sulfate, acetic acid, citric acid, lactic acid, sulfuric acid, hydrochloric acid, and glutamic acid.

  In the case of c-1, the polymerization ratio (molar ratio) between vinylpyrrolidone (α) and dialkylaminoalkyl methacrylate (β) is not particularly limited, but α is 20 to 90% and β is 10 to 80%. It is preferable that In the case of c-2, the polymerization ratio (molar ratio) of vinylpyrrolidone (α), dialkylaminoalkyl methacrylic acid (γ) and dialkylaminoalkyl methacrylate (β) is not particularly limited, but α is 10 to 95%, γ is preferably 0.5 to 80%, and β is preferably 0.5 to 80%.

  Particularly preferable examples of the component c include vinylpyrrolidone / dimethylaminoethyl diethyl methacrylate copolymer and vinylpyrrolidone / dimethylaminoethyl methacrylate / dimethylaminoethyl diethyl sulfate copolymer.

  In the cosmetic composition for hair of the present invention, in addition to the above components, within the range not impairing the effects of the present invention, if necessary, for example, a polymer compound such as amphoteric, anionic, cationic, nonionic, Alcohols such as ethanol, glycerin and sorbitol, sorbitan fatty acid esters such as sorbitan monolaurate, sorbitan monoisostearate and sorbitan tristearate, glycerin fatty acid esters such as glycerol monostearate and glycerol monooleate, POE (5 ) Hardened castor oil, POE (7.5) hardened castor oil, polyoxyethylene hardened castor oil such as POE (10) hardened castor oil, polyether-modified silicone surfactant, surfactant such as dimethicone polyol, plasticizer , Antioxidant, UV absorber, moisturizer, fragrance, dye Pigments, dyes, preservatives, vitamins, hormones, deodorants, pH adjusting agents, such as fixing agents, ingredients may be blended for use in general hair cosmetic.

  Hereinafter, the present invention will be specifically described by way of examples, but the scope of the present invention is not limited thereto.

  A hair gel was prepared by the formulation shown in Table 1 below and the following production method, and transparency, thickening and setting force were evaluated by the following evaluation methods.

Production method: Disperse component b) in part of component g).
B. Dissolve component a) in component d).
C. Dissolve component c) in part of component g).
D. Add components e) and f) to A and stir and mix uniformly.
E. B and C were added to D and stirred and mixed uniformly to obtain a hair gel.

Transparency: Measured with a HAZE meter using a 1 cm thick glass cell with purified water as a standard. Evaluation was as follows: ○ (good): HAZE value less than 5, Δ (slightly poor): 5 or more and less than 10, and x (defective): 10 or more.

Thickening: Evaluation was made using the viscosity (V) of the example (or comparative example) and the viscosity (V ₀ ) of the example (or comparative example) in which the cationic polymer was replaced with water in each example and comparative example. The viscosity was measured at 25 ° C. using a B-type viscometer (rotor: No. 4, 60 rpm). Evaluation is as follows: ○ (good): V / V ₀ is 0.8 or more, Δ (slightly bad): V / V ₀ is larger than 0.5 and less than 0.8, × (bad): V / V ₀ is 0 .5 or less.

Setting force: 2 g of sample was applied to a hair bundle (2 g, 15 cm), and an excess sample was rubbed off with a finger. Using a rheometer (manufactured by Yamaden Co., Ltd.), the maximum stress at breakage of the hair bundle was measured and used as a set force. The evaluation was as follows: ◎ (excellent): over 200, ○ (good): 120 to 200, Δ (possible): 50 to 120, x (impossible): less than 50.

About each component in Table 1, as follows:
Polyvinylpyrrolidone: Polyvinylpyrrolidone having a weight average molecular weight of 1 million, synthesized using 60 parts by weight of vinylpyrrolidone, 240 parts by weight of water, 0.21 part by weight of sodium sulfite and 0.15 part by weight of tert-butyl hydroperoxide.

Vinylpyrrolidone / vinyl acetate copolymer: Copolymerization of weight average molecular weight = 60,000, vinylpyrrolidone: vinyl acetate = 7: 3 (molar ratio) synthesized in accordance with the method described in Japanese Patent Publication No. 4-43925 Coalescence.

Carboxy vinyl polymer: “Carbopol Ultrez10” manufactured by Noveon
Carboxymethylcellulose: Sodium carboxymethylcellulose ("Serogen F-BSH-12" manufactured by Daiichi Kogyo Seiyaku).

Cationic polymer 1: A vinylpyrrolidone / dimethylaminoethyl diethyl methacrylate copolymer having a weight average molecular weight of 50,000 and synthesized by the following method. Vinylpyrrolidone (α) and N, N-dimethylaminoethyl diethyl methacrylate sulfate (β) were uniformly added to 500 g of water so that α: β = 50: 50 (molar ratio) and a total amount of 250 g. To obtain 750 g of a mixed monomer aqueous solution (first liquid). 1.25 g of 2,2′-azobis (aminodipropane) dihydrochloride was added to 100 mL of water and uniformly dissolved to obtain a second liquid. Using a reaction vessel with a capacity of 2 liters equipped with a stirrer, a heater, a reflux condenser, and a meter, introduce 150 mL of water, 185 g of the first liquid, and 30 g of the second liquid into the reaction container, and heat with stirring. The temperature was raised to 60 ° C. While maintaining this temperature, the remainder of the first liquid (565 g) was added over 4 hours, and the remainder of the second liquid (about 70 mL) was added over 6 hours. After completion of the addition, stirring was continued for another 2 hours while maintaining the temperature at 60 ° C. After completion of the stirring, the contents of the reaction vessel were cooled to obtain a transparent and colorless copolymer aqueous solution. The molecular weight of the obtained copolymer was measured using a GPC apparatus (column: Shodex OHpak SB-806MHQ, Showa Denko KK) using an acetate buffer (0.5 M CH ₃ COOH + 0.1 M NaNO ₃ ) as a solvent. (Main body: HLC-8020 manufactured by Tosoh Corporation), and the weight average molecular weight as a polyethylene glycol conversion value was determined.

Cationic polymer 2: vinylpyrrolidone / dimethylaminoethyl methacrylate / dimethylaminoethyl diethylsulfate copolymer having a weight average molecular weight = 120,000. In the synthesis method, vinylpyrrolidone (α), dimethylaminoethyl methacrylic acid (γ), and dimethylaminoethyl methacrylate diethyl sulfate (β) are used as monomers, α: γ: β = 70: 15: 15 (molar ratio). The same as the cationic polymer 1 except that the amount of 2,2′-azobis (aminodipropane) dihydrochloride as an initiator and the reaction time were changed so as to obtain the molecular weight.

Cationic polymer 3: acrylamide-diallyldimethylammonium chloride copolymer (acrylamide: diallyldimethylammonium chloride = 50: 50 (molar ratio)) having a weight average molecular weight = 50,000. Synthesis was performed in accordance with the method described in Example 4 of JP-A-63-225608.

Cationic polymer 4: Cationized hydrolyzed collagen (“Promois W-42Q” manufactured by Seiwa Kasei Co., Ltd., number average molecular weight = 1000).

Cationic polymer 5: Cationic hydrolyzed keratin (“Promois WK-Q” manufactured by Seiwa Kasei Co., Ltd., number average molecular weight = 400).

Cationic polymer 6: Vinylpyrrolidone / dimethylaminoethyl methacrylic acid / dimethylaminoethyl diethyl methacrylate sulfate copolymer having a weight average molecular weight of 250,000. In the synthesis method, vinylpyrrolidone (α), dimethylaminoethyl methacrylic acid (γ), and dimethylaminoethyl methacrylate diethyl sulfate (β) are used as monomers, α: γ: β = 70: 15: 15 (molar ratio). The same as the cationic polymer 1 except that the amount of the initiator, the reaction temperature and the reaction time were changed so as to be the molecular weight.

Cationic polymer 7: Vinylpyrrolidone / dimethylaminoethyl methacrylic acid / dimethylaminoethyl diethyl methacrylate sulfate copolymer having a weight average molecular weight of 1 million. In the synthesis method, vinylpyrrolidone (α), dimethylaminoethyl methacrylic acid (γ), and dimethylaminoethyl methacrylate diethyl sulfate (β) are used as monomers, α: γ: β = 70: 15: 15 (molar ratio). The same as the cationic polymer 1 except that the amount of the initiator, the reaction temperature and the reaction time were changed so as to be the molecular weight.

  As shown in Table 1, with respect to Comparative Example 1 in which no cationic polymer was blended, in Examples 1 to 7 in which a cationic polymer having a molecular weight of 200,000 or less was blended, thickening and setting power were not impaired. A hair gel excellent in transparency was obtained. On the other hand, in Comparative Example 2 in which a cationic polymer having a molecular weight exceeding 200,000 was blended, no improvement in transparency was observed, and the viscosity increase was significantly reduced. Moreover, in the comparative example 3, the aggregate precipitates and the product value as a hair gel is impaired.

The hair cosmetic composition of the present invention can be used as various hair cosmetics such as hair sprays, hair foams, styling lotions, hair gels, hair mists, hair waxes, hair creams and mascaras.

Claims (3)

a) polyvinylpyrrolidone and / or vinylpyrrolidone / vinyl acetate copolymer,
b) an anionic thickener, and
c) A cosmetic composition for hair containing a cationic polymer having a weight average molecular weight of 200,000 or less.   The cationic polymer is at least one of a vinylpyrrolidone / dialkylaminoalkyl methacrylate copolymer and a vinylpyrrolidone / dialkylaminoalkyl methacrylate / dialkylaminoalkyl methacrylate copolymer. Cosmetic composition for hair. The cosmetic composition for hair according to claim 1 or 2, wherein the anionic thickener is a carboxyvinyl polymer.