Composition for hair and / or scalp

Abstract

The present invention aims to provide a composition for hair and / or scalp. 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 having a pK1 of 2.2 or more. The composition for hair and / or scalp containing component (A) and component (B) can improve hair quality and has an excellent use experience.

Description

Technical Field

[0001] This invention relates to a composition for hair and / or scalp. Background Technology

[0002] Hair and scalp are damaged daily due to physical, chemical, and thermal damage caused by shampooing, blow-drying, dyeing, ultraviolet rays, etc., so damage repair and hair quality improvement are necessary.

[0003] In the prior art, hair cosmetics containing hydroxycitric acid and cysteine ​​attempt to improve formulation performance (Patent Document 1), but the repair of damage to hair and scalp and the improvement of hair quality are still insufficient.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: JP 2014-114291 Summary of the Invention

[0007] The technical problem that the invention aims to solve

[0008] The object of the present invention is to provide an excellent composition for hair and / or scalp.

[0009] Technical solutions for solving the problem

[0010] The inventors have discovered that by combining (A) polyvinylpyrrolidone and (B) one or more of the group consisting of monocarboxylic acids, dicarboxylic acids and their salts with a pK1 of 2.2 or higher, a composition for hair and / or scalp with excellent user experience can be obtained, thus completing the present invention.

[0011] Invention Effects

[0012] The composition of the present invention for hair and / or scalp has an excellent user experience because it contains (A) polyvinylpyrrolidone and (B) one or more of monocarboxylic acids, dicarboxylic acids and their salts selected from the group consisting of monocarboxylic acids and dicarboxylic acids with a pK1 of 2.2 or more. Detailed Implementation

[0013] The embodiments of the present invention are described in detail below. However, the present invention is not limited to the following embodiments. Furthermore, unless otherwise specified, terms not specifically defined in this specification are interpreted according to their conventional meaning in the technical field. In this specification, unless otherwise specified, the abbreviation "POE" refers to polyethylene oxide, and the abbreviation "PEG" refers to polyethylene glycol.

[0014] [1. A composition for use on hair and / or scalp]

[0015] The composition for hair and / or scalp involved in this embodiment contains: (A) polyvinylpyrrolidone, and (B) one or more of the group consisting of monocarboxylic acids, dicarboxylic acids and their salts having a pK1 of 2.2 or more.

[0016] <Ingredients (A)>

[0017] Polyvinylpyrrolidone (hereinafter referred to as component (A)) may be a pharmaceutically, pharmacologically (pharmaceutical), or physiologically acceptable substance, and there are no particular restrictions on its type. Component (A) may be used alone or in combination of two or more. Component (A) may be a commercially available product.

[0018] The K value of polyvinylpyrrolidone (the viscosity characteristic value calculated by measuring the relative viscosity at 25°C using a capillary viscometer and according to formula (1)) is not particularly limited, but the K value is preferably 10 to 120. Examples of K values ​​include 11 to 14 (e.g., Kollidon 12PF (manufactured by BASF Japan)), 16 to 18 (e.g., Kollidon 17PF (manufactured by BASF Japan)), 28 to 32 (e.g., Kollidon 30 (manufactured by BASF Japan)), and 85 to 95 (e.g., Kollidon 12PF (manufactured by BASF Japan)). 90F (manufactured by BASF Japan), etc. For example, 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, further preferably 20 to 80, further more preferably 25 to 60, particularly preferably 25 to 50, and even more particularly preferably 30 to 40. The K value can be obtained by the method described in the 18th revised edition of the Japanese Pharmacopoeia. According to the description of the K value of "polyvinylpyrrolidone" in the 18th revised edition of the Japanese Pharmacopoeia, it refers to 90 to 108% of the indicated K value. For example, "K30" means that the viscosity characteristic value (K value) calculated by formula (1) is in the range of 27 to 32.4.

[0019] K=(1.5logη rel-1) / (0.15+0.003c)+[300clog η rel+(c+1.5clogη rel)2]1 / 2 / (0.15c+0.003c2)…(1)

[0020] ηrel: The relative viscosity of polyvinylpyrrolidone aqueous solution relative to water.

[0021] c: Concentration of polyvinylpyrrolidone (PVP) in aqueous solution (%)

[0022] The content of component (A) in the composition for hair and / or scalp involved in this embodiment is not particularly limited, and can be appropriately set according to the type of component (A), the type and content of other added components, the purpose of the composition for hair and / or scalp, and the formulation form.

[0023] Regarding the content of component (A), from the perspective of more significantly achieving the effects of the present invention, for example based on the total amount of the composition for hair and / or scalp, the total content of component (A) may be 0.00001 to 25% by mass, preferably 0.00001 to 20% by mass, more preferably 0.00001 to 18% by mass, further 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.

[0024] <Ingredient (B)>

[0025] One or more substances selected from the group consisting of monocarboxylic acids, dicarboxylic acids, and their salts with a pK1 of 2.2 or higher (hereinafter referred to as component (B)) are pharmaceutically, pharmacologically (pharmaceutical), or physiologically acceptable, and there are no particular restrictions on their types. Component (B) may be used alone or in combination of two or more. Component (B) may be a commercially available product. Salts of component (B) may include alkali metal salts such as sodium and potassium salts, alkaline earth metal salts such as calcium and magnesium salts, copper salts, zinc salts, aluminum salts, etc. Among these, sodium salts, potassium salts, calcium salts, magnesium salts, and aluminum salts are preferred, and sodium salts and potassium salts are more preferred.

[0026] In dissociation reactions that release hydrogen ions from acids, the negative logarithm (logarithm of the reciprocal) of the equilibrium constant Ka, pK1, represents the value of the reciprocal logarithm of the first-order dissociation constant for compounds undergoing multi-order dissociation. For compounds undergoing single-order dissociation, pK1 represents the value of the reciprocal logarithm of its dissociation constant. This value is measured in water at 25°C using standard potentiometric titration. pKa values ​​can be found in publications such as *Chemistry Handbook* and *Basic Volume II* (5th revised edition, Maruzen Co., Ltd.). Values ​​not described in these publications can be calculated using the methods described therein, thus obtaining the pK1 value.

[0027] The pK1 of component (B) 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.

[0028] Component (B) may 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. From the perspective of more significantly achieving the effects of the present invention, lactic acid, succinic acid, or adipic acid are preferred in component (B).

[0029] The content of component (B) is not particularly limited and can be appropriately set according to the type of component (B), the type and content of other added components, the intended use of the composition for hair and / or scalp, and the formulation. Regarding the content of component (B), from the perspective of more significantly achieving the effects of the present invention, for example, based on the total amount of the composition for hair and / or scalp, the total content of component (B) is preferably 0.00001 to 10% by mass, more preferably 0.0005 to 10% by mass, further 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.

[0030] In the hair and / or scalp composition according to this embodiment, the content ratio of component (B) to component (A) is not particularly limited and can be appropriately set according to the types of components (A) and (B), the types and contents of other added components, the intended use of the hair and / or scalp composition, and the formulation. Regarding the content ratio of component (B) to component (A), from the perspective of more significantly achieving the effects of the present invention, for example, when the total content of component (A) in the hair and / or scalp composition according to this embodiment is 1 part by mass, the total content of component (B) is preferably 0.0000001 to 1,000,000 parts by mass, more preferably 0.00001 to 100,000 parts by mass, further 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. When the total content of component (A) in the composition for hair and / or scalp involved in this embodiment is 1 part by mass, the total content of component (B) may also be 0.001 to 10 parts by mass, 0.01 to 5 parts by mass, or 0.01 to 2 parts by mass.

[0031] The composition for hair and / or scalp described in this embodiment may also contain a water-soluble solvent. The water-soluble solvent is added in the usual amount and may be water (e.g., distilled water, deionized water, purified water), lower alcohols (e.g., ethanol, isopropanol), or polyols (e.g., glycerol, 1,2-propanediol, 1,3-propanediol, polyethylene glycol (Macrogol), 1,3-butanediol, isopentylene glycol, dipropylene glycol, etc.). A single water-soluble solvent may be used, or two or more may be used in combination. The content of the water-soluble solvent can be appropriately set according to the type and content of other components; for example, for the total amount of the composition, it may be 30–99% by weight, preferably 35–98% by weight, more preferably 40–95% by weight, further preferably 45–92% by weight, and particularly preferably 50–90% by weight.

[0032] The viscosity (25°C) of the composition for hair and / or scalp involved in 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 Method of the 18th Revision of the Japanese Pharmacopoeia.

[0033] The pH of the composition for hair and / or scalp involved in this embodiment is not particularly limited, as long as it is within the range of typical 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, further preferably 3.3 to 6.8, even more preferably 3.3 to 6.5, and particularly preferably 3.5 to 6.0.

[0034] The composition for hair and / or scalp described in this embodiment may contain known ingredients used in cosmetics, quasi-pharmaceuticals, and pharmaceuticals, as long as it does not impair the effects of the present invention. In addition to the above-mentioned ingredients (A) and (B), appropriate amounts of antioxidants, functional ingredients, moisturizers, anti-inflammatory ingredients, antibacterial agents, vitamins, amino acids, biological extracts, various pharmacologically active ingredients, and physiologically active ingredients may be added (but not including ingredients (A) and (B)). Furthermore, one or more additives may be added alone or in combination, such as cationic surfactants, anionic surfactants, preservatives, pH adjusters, chelating agents, stabilizers, buffers, thickeners, gelling agents, irritation reducers, preservatives, colorants, fragrances, minerals, etc. (but not including ingredients (A) and (B)). In addition, it may contain one or more base agents or carriers. These base agents or carriers may be appropriately selected from known substances and can be manufactured using conventional methods. Commercially available products may also be used.

[0035] (Base and Carrier)

[0036] Here, as a base agent or carrier, examples include dimethyl polysiloxane, methyl polysiloxane, highly polymerized methyl polysiloxane, cyclic organosilicon, alkyl-modified organosilicon, amino-modified organosilicon, polyether-modified organosilicon, polyglycerol-modified organosilicon, organosilicon-alkyl chain co-modified polyether-modified organosilicon, organosilicon-alkyl chain co-modified polyglycerol-modified organosilicon, polyether-modified branched organosilicon, polyglycerol-modified branched organosilicon, acrylic organosilicon, phenyl-modified organosilicon, and silicone resins, as well as silicone oils such as coconut oil, olive oil, rice bran oil, and butter from Butyrospermum Parkii fruit, cetyl alcohol, cetearyl alcohol, stearyl alcohol, behenyl alcohol, octyldodecanol, isostearyl alcohol, phytosterols, and cholesterol. The base agent or carrier can be used alone or in combination of two or more.

[0037] (surfactant)

[0038] Here, examples of cationic surfactants include alkyl trimethylammonium salts, dialkyl dimethylammonium salts, and alkyl benzyl dimethylammonium salts. Examples of these salts include hydrochlorides and sulfates.

[0039] 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 acylglutamate salts (such as cocoyl glutamate salt, C8-C22 alkyl glutamate salts), acylglycine salts (such as cocoyl glycine salt, C8-C22 alkyl glycine salts), acylalanine salts (such as cocoyl alanine salt, C8-C22 alkyl alanine salts), acylalkylalanine salts (such as lauroyl methyl alanine salt, C8-C22 alkyl alkyl alanine salts), acyl aspartate salts (such as lauroyl aspartate salt, C8-C22 alkyl aspartate salts), monoalkyl phosphates (e.g., C8-C22 alkyl phosphates), and acylsarcosine salts (such as cocoyl sarcosine salt, C8-C22 alkyl sarcosine salts).

[0040] The compositions for hair and / or scalp described in this embodiment can be in different formulations depending on the purpose. Examples of formulations include liquid, gel, semi-solid (ointment, etc.), paste, and solid forms. From the perspective of further improving the effectiveness of the present invention, the formulation of the compositions for hair and / or scalp described in this embodiment is preferably fluid, and preferably a liquid.

[0041] Examples of compositions for hair and / or scalp involved in this embodiment include gels, creams, lotions, emulsions, liquids, patches, aerosols, sprays, liniments, ointments, sachets, bleaching agents, granules, and sticks. From the perspective of further improving the effectiveness of the present invention, the preferred formulation form of the compositions for hair and / or scalp involved in this embodiment is a lotion, liquid, aerosol, or spray.

[0042] The compositions for hair and / or scalp described in this embodiment can be adhered to, smeared, sprayed, or applied to hair and / or scalp to achieve the effects of the present invention. Therefore, they can be used in shampoos, rinse-out conditioners, hair conditioners, rinse-out treatments, leave-in treatments, hair masks, scalp washes, scalp lotions, scalp serums, hair growth agents, hair nourishing agents, hair regeneration agents, hair dyes, hair coloring agents, hair sunscreens, scalp sunscreens, hair styling products, etc. Examples of hair coloring agents include hair dyes, hair dye sprays, hair dye sticks, hair dye shampoos, hair dye treatments, hair dye conditioners, hair dye rinses, temporary hair dyes, and mascaras. Hair styling products can include hair oil, styling agent, setting agent, blow dryer, combing agent, hair wax, hair cream, hair lotion, solid hair wax, hair wax, hair conditioner, hair spray, hair conditioner, strong hold hair gel, hair liquid, hair conditioner, hair foam, hairspray, etc.

[0043] The composition for hair and / or scalp described in this embodiment, containing ingredients (A) and (B), provides an excellent user experience and improves hair quality. This improvement includes, but is not limited to, the ability to control hair deformation. Controlling hair deformation refers to controlling hair curvature (curl, wave, bend, etc.), controlling hair lift, promoting shape changes such as straightening (changing shape), or controlling shape changes (maintaining the shape). To achieve this control of hair deformation, hair improvement also includes promoting hair softness, inhibiting hair dryness, moisturizing hair, promoting scalp softness, inhibiting scalp dryness, and moisturizing the scalp.

[0044] [2. Hair quality improver]

[0045] The composition for hair and / or scalp involved in this embodiment can improve hair quality due to the presence of ingredient (A) and ingredient (B). Therefore, 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 their salts having a pK1 of 2.2 or higher.

[0046] The types and amounts of ingredients (A) and (B) in the hair quality improver, the types and amounts of other ingredients, the formulation form and uses of the composition for hair and / or scalp, etc., as described in [1. Composition for hair and / or scalp].

[0047] [3. A method for imparting a hair-improving effect to a composition for use on hair and / or scalp]

[0048] The composition for hair and / or scalp involved in this embodiment can improve hair quality due to the presence of component (A) and component (B). Therefore, one embodiment of the present invention provides a method for imparting a hair quality improving effect to a composition for hair and / or scalp, comprising the step of adding (A) polyvinylpyrrolidone to a composition for hair and / or scalp containing one or more monocarboxylic acids, dicarboxylic acids and their salts selected from the group consisting of (B) having a pK1 of 2.2 or higher.

[0049] The types and amounts of components (A) and (B) in this method, the types and amounts of other components, the formulation form and uses of the composition for hair and / or scalp, etc., as described in [1. Composition for hair and / or scalp].

[0050] [4. A method for manufacturing a composition for hair and / or scalp]

[0051] The composition for hair and / or scalp involved in this embodiment can be manufactured by mixing component (A) and component (B). The types and amounts of component (A) and component (B) in this method, the types and amounts of other components, the formulation form and uses of the composition for hair and / or scalp, etc., are as described in [1. Composition for hair and / or scalp].

[0052] [1] The present invention provides a composition for hair and / or scalp, comprising: (A) polyvinylpyrrolidone, and (B) one or more of monocarboxylic acids, dicarboxylic acids and their salts selected from the group consisting of monocarboxylic acids with a pK1 of 2.2 or more.

[0053] Preferred embodiments of the present invention include the following aspects.

[0054] [2] The composition for hair and / or scalp according to [1], wherein the content of the component (A) is 0.00001 to 25 by mass.

[0055] [3] The composition for hair and / or scalp according to [1] or [2], wherein the component (A) contains polyvinylpyrrolidone with a K value of 10 to 120.

[0056] [4] The composition for hair and / or scalp according to any one of [1] to [3], wherein the content of said component (B) is 0.00001 to 10 by mass.

[0057] [5] A composition for hair and / or scalp according to any one of [1] to [4], wherein the component (B) is one or more selected from the group consisting of lactic acid, succinic acid and adipic acid.

[0058] [6] A composition for hair and / or scalp according to any one of [1] to [5], wherein when the total content of component (A) is 1 part by mass, the total content of component (B) is 0.0000001 to 1,000,000 parts by mass.

[0059] [7] The composition for hair and / or scalp according to any one of [1] to [6], wherein the total content of the water-soluble solvent is 30 to 99% by mass.

[0060] [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.

[0061] [9] The composition for hair and / or scalp according to any one of [1] to [8], which is used for washing.

[0062]

[10] A hair quality improver comprising: (A) polyvinylpyrrolidone, and (B) one or more of monocarboxylic acids, dicarboxylic acids and their salts selected from the group consisting of monocarboxylic acids with a pK1 of 2.2 or higher.

[0063]

[11] A hair deformation control agent comprising: (A) polyvinylpyrrolidone, and (B) one or more of monocarboxylic acids, dicarboxylic acids and their salts selected from the group consisting of monocarboxylic acids with a pK1 of 2.2 or higher.

[0064]

[12] A hair curl inhibitor comprising: (A) polyvinylpyrrolidone, and (B) one or more of monocarboxylic acids, dicarboxylic acids and their salts selected from the group consisting of monocarboxylic acids with a pK1 of 2.2 or higher.

[0065]

[13] A hair frizz inhibitor comprising: (A) polyvinylpyrrolidone, and (B) one or more of monocarboxylic acids, dicarboxylic acids and their salts selected from the group consisting of monocarboxylic acids with a pK1 of 2.2 or higher.

[0066]

[14] A hair straightening accelerator comprising: (A) polyvinylpyrrolidone, and (B) one or more of monocarboxylic acids, dicarboxylic acids and their salts selected from the group consisting of monocarboxylic acids with a pK1 of 2.2 or higher.

[0067]

[15] A hair frizz inhibitor comprising: (A) polyvinylpyrrolidone, and (B) one or more of monocarboxylic acids, dicarboxylic acids and their salts selected from the group consisting of monocarboxylic acids with a pK1 of 2.2 or higher.

[0068]

[16] A hair softening agent comprising: (A) polyvinylpyrrolidone, and (B) one or more of monocarboxylic acids, dicarboxylic acids and their salts selected from the group consisting of monocarboxylic acids with a pK1 of 2.2 or higher.

[0069]

[17] A hair moisturizer comprising: (A) polyvinylpyrrolidone, and (B) one or more of monocarboxylic acids, dicarboxylic acids and their salts selected from the group consisting of monocarboxylic acids with a pK1 of 2.2 or higher.

[0070]

[18] A scalp moisturizer comprising: (A) polyvinylpyrrolidone, and (B) one or more of monocarboxylic acids, dicarboxylic acids and their salts selected from the group consisting of monocarboxylic acids with a pK1 of 2.2 or higher.

[0071]

[19] Use of a composition comprising (A) polyvinylpyrrolidone and (B) one or more monocarboxylic acids, dicarboxylic acids and their salts having a pK1 of 2.2 or higher in the manufacture of a hair quality improver.

[0072]

[20] Use of a composition comprising (A) polyvinylpyrrolidone and (B) one or more monocarboxylic acids, dicarboxylic acids and their salts selected from the group consisting of a pK1 of 2.2 or higher.

[0073]

[21] Use of a composition comprising (A) polyvinylpyrrolidone and (B) one or more monocarboxylic acids, dicarboxylic acids and their salts selected from the group consisting of a pK1 of 2.2 or higher.

[0074]

[22] Use of a composition comprising (A) polyvinylpyrrolidone and (B) one or more monocarboxylic acids, dicarboxylic acids and their salts selected from the group consisting of a pK1 of 2.2 or higher.

[0075]

[23] Use of a composition comprising (A) polyvinylpyrrolidone and (B) one or more monocarboxylic acids, dicarboxylic acids and their salts selected from the group consisting of a pK1 of 2.2 or higher, in the manufacture of a hair straightening accelerator.

[0076]

[24] Use of a composition comprising (A) polyvinylpyrrolidone and (B) one or more monocarboxylic acids, dicarboxylic acids and their salts selected from the group consisting of a pK1 of 2.2 or higher.

[0077]

[25] Use of a composition comprising (A) polyvinylpyrrolidone and (B) one or more monocarboxylic acids, dicarboxylic acids and their salts having a pK1 of 2.2 or higher in the manufacture of a hair softening agent.

[0078]

[26] Use of a composition comprising (A) polyvinylpyrrolidone and (B) one or more monocarboxylic acids, dicarboxylic acids and their salts having a pK1 of 2.2 or higher in the manufacture of a hair moisturizer.

[0079]

[27] Use of a composition comprising (A) polyvinylpyrrolidone and (B) one or more monocarboxylic acids, dicarboxylic acids and their salts having a pK1 of 2.2 or higher in the manufacture of a scalp moisturizer.

[0080] Example

[0081] The present invention will now be described in detail with reference to experimental examples, but the present invention is not limited to these experimental examples. Furthermore, the amounts added in the following examples represent mass%.

[0082] [Experimental Example 1: Evaluation of Use] The compositions shown in Table 1 below were prepared using conventional methods. The K value of polyvinylpyrrolidone was 30. The expert panel evaluated the compositions according to the evaluation criteria. The results are shown in Table 1.

[0083]

[0084] (Feel evaluation criteria)

[0085] After washing a human hair strand with commercially available shampoo (Kinky Curl Virgin Cuticle Aligned Hair Products, Xuchang Yousheng Hair Products), immerse the entire strand in each test solution, leave it at room temperature for 5 minutes, and then rinse thoroughly with water. Blow-dry the strand and run your fingers from the roots to the ends of the dried strand to evaluate the feel (touch) according to the following criteria.

[0086] ◎: No pulling sensation

[0087] 〇: There is a pulling sensation at the ends of the hair, but the fingers can pass through smoothly.

[0088] △: There is a pulling sensation from the middle of the hair strand to the ends, but your fingers can easily pass through it.

[0089] ×: I feel my hair is tangled, and it's difficult to thread my fingers through it.

[0090] (Evaluation Criteria for Extensibility)

[0091] After washing a human hair strand with commercially available shampoo (Kinky Curl Virgin Cuticle Aligned Hair Products, Xuchang Yousheng Hair Products), immerse the entire strand in each test solution, leave at room temperature for 5 minutes, and then rinse thoroughly with water. Straighten the hair with a hairdryer and observe the dried strand. Evaluate the stretchability according to the following criteria.

[0092] ◎: No curls

[0093] 〇: Curly hair ends

[0094] △: Curly hair roots

[0095] ×: Overall curl

[0096] (Easy-to-define rational evaluation benchmark)

[0097] After washing a human hair strand with commercially available shampoo (Kinky Curl Virgin Cuticle Aligned Hair Products, Xuchang Yousheng Hair Products), immerse the entire strand in each test solution, leave at room temperature for 5 minutes, and then rinse thoroughly with water. Blow-dry the hair and evaluate its manageability according to the following criteria.

[0098] ◎: Fits evenly and is easy to maintain

[0099] 〇: It fits evenly and is easy to maintain.

[0100] △: The fit is not entirely uniform, but it is easy to maintain.

[0101] ×: Uneven fit, difficult to maintain

[0102] In the composition containing ingredients (A) and (B), the hair strands are easily shaped by hand due to the smooth passage of fingers, and the physical damage caused by friction on the hair surface is minimal due to the low friction. In the composition containing ingredients (A) and (B), when wet hair is blow-dried and straightened, curls easily straighten, indicating high hair smoothness, controllable curl shape, and improved hair quality. In the composition containing ingredients (A) and (B), the hair is evenly smooth and easy to manage after shampooing and blow-drying, indicating an effect from the roots to the ends, improved hair quality, and high-quality hair suitable for easy styling.

[0103] [Experiment Example 2: Usage Evaluation]

[0104] The compositions shown in Table 2 below were prepared using conventional methods. The K value of polyvinylpyrrolidone was 30. The expert panel evaluated the compositions according to the evaluation criteria. The evaluation criteria for feel were the same as in Test Example 1. The results are shown in Table 2.

[0105]

[0106] (Evaluation criteria for foaming properties)

[0107] Each test solution was applied to a human hair curler (Kinky Curl Virgin Cuticle Aligned Hair Products, Xuchang Yousheng Hair Products Co., Ltd.), and then shampooed for 1 minute. Foaming properties were observed during shampooing and evaluated according to the following criteria.

[0108] ◎: Foaming occurs, with foam covering the entire hair strand; the amount of foam increases during the shampooing process.

[0109] 〇: Foaming occurs, with foam covering the entire hair strand; the amount of foam remains constant throughout the shampooing process.

[0110] △: Foaming occurs, with foam covering the entire hair strand; the amount of foam decreases during the shampooing process.

[0111] ×: Foaming, but the foam doesn't cover the entire hair strand.

[0112] [Experiment Example 3: Usage Evaluation]

[0113] The compositions shown in Table 3 below were prepared using conventional methods. The K value of polyvinylpyrrolidone was 30. The expert panel evaluated the compositions according to the evaluation criteria. The evaluation criteria for hand feel and workability were the same as in Test Example 1. The results are shown in Table 3.

[0114]

[0115] [Experiment 4: Usage Evaluation]

[0116] The compositions shown in Table 4 below were prepared using conventional methods. The K value of polyvinylpyrrolidone was 30. The expert panel members used the products as hair care products and evaluated them according to the evaluation criteria. The evaluation criteria for feel and manageability were the same as in Test Example 1. The results are shown in Table 4.

[0117]

[0118] [Experiment Example 5: Usage Evaluation]

[0119] The compositions shown in Table 5 below were prepared using conventional methods. The K value of polyvinylpyrrolidone was 30. The expert panel members used it as a hair shampoo and evaluated it according to the evaluation criteria. The evaluation criteria for foaming properties were the same as in Test Example 2. The evaluation criteria for hand feel were the same as in Test Example 1. The results are shown in Table 5.

[0120]

Claims

1. A composition for use on hair and / or scalp, comprising: (A) Polyvinylpyrrolidone, and (B) Select one or more of the group consisting of monocarboxylic acids, dicarboxylic acids and their salts with a pK1 of 2.2 or higher.

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

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

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

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

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