Composition for hair and / or scalp

Abstract

The purpose of the present invention is to provide a composition for hair and / or a scalp. The present invention is a composition for hair and / or a scalp, the composition containing (A) polyvinylpyrrolidone, and (B) one or more selected from the group consisting of monocarboxylic acids having a pK1 of at least 2.2, dicarboxylic acids, and salts thereof. The composition for hair and / or a scalp containing the component (A) and the component (B) improves hair quality and has an excellent feel of use.

Description

Compositions for hair and / or scalp

[0001] The present invention relates to a composition for hair and / or scalp.

[0002] Hair and scalp are damaged on a daily basis by physical damage such as washing, drying with a hair dryer, dyeing, ultraviolet rays, chemical damage, and thermal damage, and attempts have been made to repair this damage and improve hair quality.

[0003] Attempts have been made to improve the performance of hair cosmetics containing hydroxycitric acids and cystemian (Patent Document 1), but it has not been possible to say that they are sufficient in repairing damage to hair and scalp or improving hair quality.

[0004] JP 2014-114291 A

[0005] An object of the present invention is to provide an excellent hair and / or scalp composition.

[0006] The present inventors have discovered that a composition for hair and / or scalp containing (A) polyvinylpyrrolidone and (B) one or more members selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof, each having a pK1 of 2.2 or more, provides an excellent feel when used, and have completed the present invention.

[0007] The composition for hair and / or scalp of the present invention contains (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof, each having a pK1 of 2.2 or more, and therefore has an excellent feel when used.

[0008] Hereinafter, embodiments for carrying out the present invention will be described in detail. However, the present invention is not limited to the following embodiments. In addition, terms used in this specification are interpreted as having the meanings commonly used in the technical field unless otherwise specified. In this specification, the abbreviation "POE" means polyoxyethylene, and the abbreviation "PEG" means polyethylene glycol, unless otherwise specified.

[0009] [1. Composition for Hair and / or Scalp] The composition for hair and / or scalp according to this embodiment contains (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof, each having a pK1 of 2.2 or more.

[0010] <Component (A)> Polyvinylpyrrolidone (hereinafter also simply referred to as component (A)) is not particularly limited as long as it is pharmaceutically, pharmacologically (pharmaceutical), or physiologically acceptable. Component (A) may be used alone or in combination of two or more. Component (A) can be commercially available.

[0011] The K value of polyvinylpyrrolidone (viscosity characteristic value calculated by applying the relative viscosity value (25°C) measured by a capillary viscometer to the following formula (1)) is not limited, but the K value is preferably 10 to 120, and examples of the K value include 11 to 14 (for example, Kollidon 12PF (manufactured by BASF Japan)), 16 to 18 (for example, Kollidon 17PF (manufactured by BASF Japan)), 28 to 32 (for example, Kollidon 30 (manufactured by BASF Japan)), and 85 to 95 (for example, Kollidon 90F (manufactured by BASF Japan Ltd.), etc. Examples include polyvinylpyrrolidone K25, polyvinylpyrrolidone K30, polyvinylpyrrolidone K40, polyvinylpyrrolidone K50, polyvinylpyrrolidone K60, polyvinylpyrrolidone K80, polyvinylpyrrolidone K85, polyvinylpyrrolidone K90, polyvinylpyrrolidone K120, etc. The K value of polyvinylpyrrolidone is preferably 10 to 120, more preferably 15 to 90. The K value is preferably 20 to 80, even more preferably 25 to 60, particularly preferably 25 to 50, and even more preferably 30 to 40. The K value can be determined by the method described in the Japanese Pharmacopoeia, 18th Edition. In accordance with the description of the K value of "povidone" in the Japanese Pharmacopoeia, 18th Edition, the K value is 90 to 108% of the indicated K value, so for example, "K30" refers to a viscosity characteristic value (K value) calculated by applying formula (1) in the range of 27 to 32.4.

[0012] K = (1.5 log η rel - 1) / (0.15 + 0.003 c) + [300 c log η rel + (c + 1.5 c log η rel) 2] 1 / 2 / (0.15 c + 0.003 c 2) ... (1) η rel: relative viscosity of the aqueous polyvinylpyrrolidone solution to water, c: polyvinylpyrrolidone concentration (%) in the aqueous polyvinylpyrrolidone solution

[0013] The content of component (A) in the composition for hair and / or scalp according to this embodiment is not particularly limited and is set appropriately depending on the type of component (A), the types and contents of other blended components, the intended use and formulation of the composition for hair and / or scalp, etc. From the viewpoint of more significantly exhibiting the effects of the present invention, the content of component (A) may be, for example, 0.00001 to 25% by mass, preferably 0.00001 to 20% by mass, more preferably 0.00001 to 18% by mass, even more preferably 0.0001 to 15% by mass, even more preferably 0.0005 to 12% by mass, and particularly preferably 0.001 to 10% by mass, based on the total amount of the composition for hair and / or scalp.

[0014] <Component (B)> The one or more compounds selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof having a pK1 of 2.2 or more (hereinafter simply referred to as component (B)) are not particularly limited as long as they are pharmaceutically, pharmacologically (pharmaceutical), or physiologically acceptable. Only one compound may be used as component (B), or two or more compounds may be used in combination. A commercially available compound can also be used as component (B). Examples of salts of component (B) include alkali metal salts such as sodium salts and potassium salts; alkaline earth metal salts such as calcium salts and magnesium salts; and metal salts such as copper salts, zinc salts, and aluminum salts. Among these, sodium salts, potassium salts, calcium salts, magnesium salts, and aluminum salts are preferred, and sodium salts and potassium salts are more preferred.

[0015] The negative common logarithm (logarithm of the reciprocal) of the equilibrium constant Ka in the dissociation reaction in which hydrogen ions are released from an acid, pKa, is the logarithm of the reciprocal of the first dissociation constant of a compound that undergoes multi-stage dissociation.１ In the case of a compound that undergoes one-stage dissociation, the value showing the logarithm of the reciprocal of the dissociation constant is taken as pK1. This means the value measured in water at 25°C by potentiometric titration according to the standard method. For the pKa value, reference can be made to literature such as Chemistry Handbook, Basics II (Revised 5th Edition, Maruzen Co., Ltd.), and values ​​not listed in the literature can be calculated by the method described in the literature, so the pK1 value can be obtained.

[0016] pK of component (B) １ is preferably 2.2 to 6.8, more preferably 2.2 to 6.2, even more preferably 2.4 to 5.8, even more preferably 2.6 to 5.3, and particularly preferably 2.8 to 4.8.

[0017] Examples of component (B) include lactic acid (pK1 = 3.86), succinic acid (pK1 = 4.21), adipic acid (pK1 = 4.45), glycolic acid (pK1 = 3.63), malic acid (pK1 = 3.51), tartaric acid (pK1 = 2.98), fumaric acid (pK1 = 3.03), gluconic acid (pK1 = 3.6), salicylic acid (pK1 = 2.81), pantothenic acid (pK1 = 4.30), etc. Among component (B), lactic acid, succinic acid, or adipic acid is preferred from the viewpoint of achieving the effects of the present invention more significantly.

[0018] The content of component (B) is not particularly limited and is set appropriately depending on the type of component (B), the types and contents of other blended components, the intended use and formulation of the composition for hair and / or scalp, etc. From the viewpoint of more significantly exhibiting the effects of the present invention, the content of component (B) is, for example, preferably 0.00001 to 10% by mass, more preferably 0.0005 to 10% by mass, even more preferably 0.0005 to 8% by mass, even more preferably 0.001 to 7% by mass, and particularly preferably 0.001 to 5% by mass, based on the total amount of the composition for hair and / or scalp.

[0019] The content ratio of the component (B) relative to the component (A) in the composition for hair and / or scalp according to this embodiment is not particularly limited, and is set appropriately depending on the types of the components (A) and (B), the types and contents of other blended components, the intended use and formulation of the composition for hair and / or scalp, etc. From the viewpoint of more significantly exhibiting the effects of the present invention, the content ratio of the component (B) relative to the component (A) is, for example, preferably 0.0000001 to 1,000,000 parts by mass, more preferably 0.00001 to 100,000 parts by mass, even more preferably 0.0001 to 10,000 parts by mass, even more preferably 0.001 to 1,000 parts by mass, and particularly preferably 1 to 500 parts by mass, relative to 1 part by mass of the total content of the component (A) contained in the composition for hair and / or scalp according to this embodiment. The total content of the component (B) may be 0.001 to 10 parts by mass, 0.01 to 5 parts by mass, or 0.01 to 2 parts by mass relative to 1 part by mass of the total content of the component (A) contained in the composition for hair and / or scalp according to this embodiment.

[0020] The composition for hair and / or scalp according to this embodiment may further contain a water-soluble solvent. The water-soluble solvent may be of a quality typically used in cosmetics, such as water (e.g., distilled water, ion-exchanged water, purified water), lower alcohols (e.g., ethanol, isopropanol), or polyhydric alcohols (e.g., glycerin, propylene glycol, propanediol, polyethylene glycol (macrogol), 1,3-butylene glycol, isoprene glycol, dipropylene glycol, etc.). The water-soluble solvent may be used alone or in combination of two or more. The content of the water-soluble solvent may be appropriately determined depending on the type and content of other components, and may be, for example, 30 to 99 wt % of the total amount of the composition, preferably 35 to 98 wt %, more preferably 40 to 95 wt %, even more preferably 45 to 92 wt %, and particularly preferably 50 to 90 wt %.

[0021] The viscosity (25°C) of the composition for hair and / or scalp according to this embodiment is not limited, but is preferably 100 to 100,000 mPa·s, more preferably 300 to 80,000 mPa·s, and even more preferably 500 to 60,000 mPa·s. The viscosity (25°C) is measured according to the viscosity measurement method described in the General Test Methods of the 18th Edition of the Japanese Pharmacopoeia.

[0022] The pH of the composition for hair and / or scalp according to this embodiment is not particularly limited as long as it is within the range used in ordinary compositions for hair and / or scalp. The pH of the composition for hair and / or scalp can be, for example, 3.0 to 9.5, preferably 3.0 to 8.0, more preferably 3.0 to 7.0, even more preferably 3.3 to 6.8, even more preferably 3.3 to 6.5, and particularly preferably 3.5 to 6.0.

[0023] The hair and / or scalp composition according to this embodiment may contain known ingredients used in cosmetics, quasi-drugs, and pharmaceuticals, as long as they do not impair the effects of the present invention. In addition to the above-mentioned components (A) and (B), appropriate amounts of, for example, antioxidants, functional ingredients, moisturizers, anti-inflammatory ingredients, antibacterial agents, vitamins, amino acids, biological extracts, and various pharmacologically and physiologically active ingredients may be combined (excluding the above-mentioned components (A) and (B)). Additives such as cationic surfactants, anionic surfactants, preservatives, pH adjusters, chelating agents, stabilizers, buffers, thickeners, gelling agents, irritation reducers, antiseptics, colorants, fragrances, and minerals may be added singly or in combination (excluding the above-mentioned components (A) and (B)). Furthermore, the composition may contain one or more bases or carriers. These may be selected from known materials and prepared using conventional methods. Commercially available products may also be used.

[0024] (Base / Carrier) Here, examples of the base or carrier include silicone oils such as dimethylpolysiloxane, methylpolysiloxane, highly polymerized methylpolysiloxane, cyclic silicone, alkyl-modified silicone, amino-modified silicone, polyether-modified silicone, polyglycerin-modified silicone, silicone / alkyl chain co-modified polyether-modified silicone, silicone / alkyl chain co-modified polyglycerin-modified silicone, polyether-modified branched silicone, polyglycerin-modified branched silicone, acrylic silicone, phenyl-modified silicone, and silicone resin; oils and fats such as coconut oil, olive oil, rice bran oil, and shea butter; higher alcohols such as cetanol, cetostearyl alcohol, stearyl alcohol, behenyl alcohol, octyldodecanol, isostearyl alcohol, phytosterol, and cholesterol. The base or carrier may be used alone or in combination of two or more.

[0025] (Surfactant) Here, examples of cationic surfactants include alkyltrimethylammonium salts, dialkyldimethylammonium salts, alkylbenzyldimethylammonium salts, etc. Examples of salts of these include hydrochlorides and sulfates.

[0026] Examples of anionic surfactants include carboxylic acid-based anionic surfactants, sulfonic acid-based anionic surfactants, phosphate-based anionic surfactants, amino acid-based anionic surfactants, and protein hydrolysate-based anionic surfactants. Among these, examples of amino acid-based anionic surfactants include acyl glutamates (C8 to C22 alkanoyl glutamates such as cocoyl glutamate), acyl glycine salts (C8 to C22 alkanoyl glycine salts such as cocoyl glycine salt), acylalanine salts (C8 to C22 alkanoyl alanine salts such as cocoyl alanine salt), acyl alkyl alanine salts (C8 to C22 alkanoyl alkyl alanine salts such as lauroyl methyl alanine salt), acylaspartates (C8 to C22 alkanoyl aspartates such as lauroyl aspartate), monoalkyl phosphates (C8 to C22 alkyl phosphates, etc.), and acyl sarcosine salts (C8 to C22 alkanoyl sarcosine salts such as cocoyl sarcosine salt).

[0027] The hair and / or scalp composition according to this embodiment can take various formulation forms depending on the purpose. Examples of formulation forms include liquid, gel, semi-solid (ointment, etc.), paste, and solid. The formulation form of the hair and / or scalp composition according to this embodiment preferably has fluidity, and is preferably a liquid, from the viewpoint of further enhancing the effects of the present invention. Examples of the hair and / or scalp composition according to this embodiment include gel, cream, lotion, emulsion, liquid, patch, aerosol, mist, liniment, ointment, pack, hair bleach, granule, and stick. The formulation form of the hair and / or scalp composition according to this embodiment is preferably a lotion, liquid, aerosol, or mist, from the viewpoint of further enhancing the effects of the present invention.

[0028] The composition for hair and / or scalp according to this embodiment exhibits the effects of the present invention when attached, applied, sprayed, or administered to hair and / or scalp, and can therefore be used in applications such as shampoo, rinse, conditioner, rinse-off treatment, leave-in treatment, hair pack, scalp lotion, scalp emulsion, scalp beauty serum, hair growth agent, hair care agent, hair growth agent, hair dye, hair colorant, sunscreen for hair, sunscreen for scalp, hair styling product, etc. Examples of hair colorants include hair dye, hair color spray, hair color stick, color shampoo, color treatment, color conditioner, color rinse, hair manicure, and hair mascara. Examples of hair styling agents include hair oil, styling agents, setting agents, blow-drying agents, brushing agents, pomade, hair cream, hair milk, hair solid, hair wax, hair balm, hair spray, hair mist, hair lacquer, hair liquid, hair water, hair foam, and hair gel.

[0029] The hair and / or scalp composition according to this embodiment contains component (A) and component (B), and therefore has an excellent feel when used and an effect of improving hair quality. Hair quality improvement includes, but is not limited to, being able to control hair deformation. Controlling hair deformation refers to suppressing hair bending (curls, waves, undulations, etc.), suppressing hair spreading, promoting a change in shape such as straightening (changing the shape), or suppressing a change in shape (maintaining the shape unchanged). To enable such hair deformation control, hair quality improvement also includes promoting hair flexibility, suppressing hair dryness, moisturizing hair, promoting scalp flexibility, suppressing scalp dryness, moisturizing the scalp, etc.

[0030] [2. Hair Quality Improver] The composition for hair and / or scalp according to this embodiment improves hair quality by containing component (A) and component (B). Thus, one embodiment of the present invention provides a hair quality improver containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof, each having a pK1 of 2.2 or more.

[0031] The types and contents of the component (A) and the component (B), the types and contents of other components, and the formulation form and use of the composition for hair and / or scalp in the hair quality improving agent are as explained in [1. Composition for hair and / or scalp].

[0032] [3. Method for imparting a hair quality improving effect to a composition for hair and / or scalp] The composition for hair and / or scalp according to this embodiment improves hair quality by containing component (A) and component (B). Accordingly, one embodiment of the present invention provides a method for imparting an effect of promoting hair quality improvement by a composition for hair and / or scalp, the method comprising blending (A) polyvinylpyrrolidone with a composition for hair and / or scalp containing (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof, each having a pK1 of 2.2 or more.

[0033] In this method, the types and contents of the component (A) and the component (B), the types and contents of other components, the formulation form and use of the composition for hair and / or scalp, etc. are as explained in [1. Composition for hair and / or scalp].

[0034] [4. Method for producing a composition for hair and / or scalp] The composition for hair and / or scalp according to this embodiment can be produced by mixing component (A) and component (B). In this method, the types and contents of component (A) and component (B), the types and contents of other components, the formulation form and use of the composition for hair and / or scalp, etc. are as described in [1. Composition for hair and / or scalp].

[0035] The present invention provides: [1] a composition for hair and / or scalp containing (A) polyvinylpyrrolidone, and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof, each having a pK1 of 2.2 or higher. Preferred aspects of the present invention include the following: [2] the composition for hair and / or scalp according to [1], which contains 0.00001 to 25% by mass of component (A); [3] the composition for hair and / or scalp according to [1] or [2], in which component (A) contains polyvinylpyrrolidone having a K value of 10 to 120; [4] the composition for hair and / or scalp according to any of [1] to [3], which contains 0.00001 to 10% by mass of component (B); [5] the composition for hair and / or scalp according to any of [1] to [4], in which component (B) is one or more selected from the group consisting of lactic acid, succinic acid, and adipic acid. [6] The composition for hair and / or scalp according to any one of [1] to [5], wherein the total content of the (B) component is 0.0000001 to 1,000,000 parts by mass per part by mass of the total content of the (A) component. [7] The composition for hair and / or scalp according to any one of [1] to [6], wherein the total content of water-soluble solvents is 30 to 99% by mass. [8] The composition for hair and / or scalp according to any one of [1] to [7], wherein the viscosity at 25°C is 100 to 100,000 mPa s. [9] The composition for hair and / or scalp according to any one of [1] to [8], wherein the composition is for cleansing.

[10] A hair quality improving agent comprising (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof, each having a pK1 of 2.2 or more. ;

[11] A hair deformation control agent containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof having a pK1 of 2.2 or more. ;

[12] A hair curl inhibitor containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof having a pK1 of 2.2 or more. ;

[13] A hair frizz inhibitor containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof having a pK1 of 2.2 or more.;

[14] A hair straightening promoter containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof having a pK1 of 2.2 or more. ;

[15] A hair spread inhibitor containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof having a pK1 of 2.2 or more. ;

[16] A hair softening promoter containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof having a pK1 of 2.2 or more. ;

[17] A hair moisturizing agent containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof having a pK1 of 2.2 or more. ;

[18] A scalp moisturizing agent containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof having a pK1 of 2.2 or more. ;

[19] Use of a composition containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof having a pK1 of 2.2 or more, in the production of a hair quality improving agent. ;

[20] Use of a composition containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof having a pK1 of 2.2 or more, in the production of a hair deformation controlling agent. ;

[21] Use of a composition containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof having a pK1 of 2.2 or more, in the production of a hair curl inhibitor. ;

[22] Use of a composition containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof having a pK1 of 2.2 or more, in the production of a hair frizz inhibitor.

[23] Use of a composition containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof, each having a pK1 of 2.2 or more, in the production of a hair straightening promoter.;

[24] Use of a composition containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof having a pK1 of 2.2 or more, in the production of a hair frizz inhibitor. ;

[25] Use of a composition containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof having a pK1 of 2.2 or more, in the production of a hair softening promoter. ;

[26] Use of a composition containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof having a pK1 of 2.2 or more, in the production of a hair moisturizer. ;

[27] Use of a composition containing (A) polyvinylpyrrolidone and (B) one or more selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof having a pK1 of 2.2 or more, in the production of a scalp moisturizer.

[0036] The present invention will be specifically described below based on test examples, but the present invention is not limited to these. In the following examples, the blending amounts are expressed as mass %.

[0037] Test Example 1: Evaluation in Use The compositions shown in Table 1 below were prepared according to a conventional method. Polyvinylpyrrolidone with a K value of 30 was used. Evaluation was carried out by a specialist panel according to the evaluation criteria. The results are shown in Table 1.

[0038]

[0039] (Evaluation criteria for texture) After washing curling human hair bundles (Kinky Curl Virgin Cuticle Aligned Hair Products, manufactured by Xuchang Yousheng Hair Products Co., Ltd.) with a commercially available shampoo, the entire hair bundle was immersed in each test solution, left to stand at room temperature for 5 minutes, and then rinsed with water. The hair bundles were blow-dried using a hair dryer, and the dried hair bundles were slid with fingers from the root to the tip, and the texture (feel) was evaluated according to the following criteria: ◎: No tangling felt; ○: Tangling felt at the tip, but fingers could be run smoothly; △: Tangling felt from the middle to the tip of the hair bundle, but fingers could be run smoothly; ×: Hair was tangled, and fingers were not easily run smoothly.

[0040] (Evaluation criteria for extensibility) After washing curling human hair bundles (Kinky Curl Virgin Cuticle Aligned Hair Products, manufactured by Xuchang Yousheng Hair Products Co., Ltd.) with a commercially available shampoo, the entire hair bundle was immersed in each test solution, left to stand at room temperature for 5 minutes, and then rinsed with water. The hair was blown using a hair dryer to straighten it out, and the hair bundle was observed after drying. Extensibility was evaluated according to the following criteria. ◎: No curls ○: Curls at the ends △: Curls at the roots ×: Curls throughout the hair

[0041] (Evaluation criteria for manageability) After washing a curling human hair bundle (Kinky Curl Virgin Cuticle Aligned Hair Products, manufactured by Xuchang Yousheng Hair Products Co., Ltd.) with a commercially available shampoo, the entire hair bundle was immersed in each test solution, left to stand at room temperature for 5 minutes, and then rinsed with water. The hair was then blow-dried with a hair dryer, and the manageability of the hair after drying was evaluated according to the following criteria: ◎: Spreads evenly and is easy to manage; ○: Spreads somewhat evenly and is easy to manage; △: Spreads slightly unevenly, but is easy to manage; ×: Spreads unevenly and is difficult to manage

[0042] It is believed that the composition containing component (A) and component (B) provides smooth finger-combing, making it easy to style the hair bundle, and that the low friction on the hair surface reduces physical damage caused by rubbing the hair. When blow-dried to straighten wet hair, the composition containing component (A) and component (B) easily straightens out the curls, improving hair flexibility and suppressing curl formation, thereby improving hair quality. The composition containing component (A) and component (B) caused hair to spread evenly and easily manageably after blow-dried after shampooing, demonstrating its effectiveness from the roots of the hair bundle to the fine tips, improving hair quality to make it easier to style.

[0043] Test Example 2: Evaluation in Use The compositions shown in Table 2 below were prepared according to a conventional method. Polyvinylpyrrolidone with a K value of 30 was used. Evaluation was carried out by a specialist panel according to the evaluation criteria. The evaluation criteria for texture were the same as those in Test Example 1. The results are shown in Table 2.

[0044]

[0045] (Evaluation criteria for foaming) Each test solution was applied to the entire curled human hair bundle (Kinky Curl Virgin Cuticle Aligned Hair Products, manufactured by Xuchang Yousheng Hair Products Co., Ltd.), and then the hair was washed for 1 minute. Foaming during washing was observed and evaluated according to the following criteria. ◎: Foam was generated and spread over the entire hair bundle, and the amount of foam increased while washing. ○: Foam was generated and spread over the entire hair bundle, and the amount of foam was maintained during washing. △: Foam was generated and spread over the entire hair bundle, but the amount of foam decreased while washing. ×: Foam was generated, but foam did not spread over the entire hair bundle.

[0046] Test Example 3: Evaluation in Use The compositions shown in Table 3 below were prepared according to a conventional method. Polyvinylpyrrolidone with a K value of 30 was used. Evaluation was carried out by a specialist panel according to the evaluation criteria. The evaluation criteria for feel and manageability were the same as those in Test Example 1. The results are shown in Table 3.

[0047]

[0048] Test Example 4: Evaluation in Use The compositions shown in Table 4 below were prepared according to a conventional method. Polyvinylpyrrolidone with a K value of 30 was used. Expert panelists used the compositions as hair treatments and evaluated them according to the evaluation criteria. The evaluation criteria for feel and manageability were the same as those in Test Example 1. The results are shown in Table 4.

[0049]

[0050] Test Example 5: Evaluation in Use The compositions shown in Table 5 below were prepared according to a conventional method. Polyvinylpyrrolidone with a K value of 30 was used. Expert panelists used the compositions as hair shampoos and evaluated them according to the evaluation criteria. The evaluation criteria for foaming were the same as those in Test Example 2. The evaluation criteria for texture were the same as those in Test Example 1. The results are shown in Table 5.

[0051]

Claims

1. A composition for hair and / or scalp containing (A) polyvinylpyrrolidone, and (B) one or more members selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and salts thereof, each having a pK1 of 2.2 or greater.

2. The composition for hair and / or scalp according to claim 1, containing 0.001 to 10% by mass of component (A).

3. A composition for hair and / or scalp according to claim 1 or 2, wherein component (B) is one or more selected from the group consisting of lactic acid, succinic acid and adipic acid.

4. A composition for hair and / or scalp according to claim 1 or 3, containing 0.001 to 5% by mass of component (B).

5. A composition for hair and / or scalp according to claim 1 or 2, wherein the total content of the (B) component is 0.0000001 to 1,000,000 parts by mass per 1 part by mass of the total content of the (A) component.

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