JP4313245B2 - Hair cosmetics - Google Patents

Description

  The present invention relates to a hair cosmetic excellent in the effect of repairing and inhibiting hair damage caused by coloring, dryer drying and the like.

  In recent years, along with the trend of coloring, damages such as harshness and difficulty in cohesion of hair treated with a coloring system (1 to 2 agent type) have been highlighted. Similarly, the same damage is caused to the hair that has been subjected to permanent wave treatment. It is said that damage to hair based on this coloring system or the like is caused by hollowing of the hair due to chemical factors of the hair dye used. On the other hand, it has been clarified that damage to the hair such as loss of hair gloss and crushing due to drying of the hair dryer after shampooing is caused by hollowing of the hair due to the heat of the hair dryer (Non-patent Document 1).

  As a method for repairing damaged hair based on such a coloring system, hair cosmetics containing water-insoluble cationic fine particles (Patent Document 1), and amino acid amphoteric active agents and natural triglycerides are contained. Hair cosmetics (Patent Document 2) and the like for repairing hair have been proposed. Moreover, as a method for suppressing damage caused by the heat of the dryer, hair cosmetics containing phytantriol and silicone (Patent Document 3), dimethyl silicone gum, polyethylene glycol, and a cationic surfactant (Patent Document) 4) Hair cosmetics containing hydrolyzed wheat protein, wheat oligosaccharides, wheat amino acids and panthenol (Patent Document 5) have been proposed.

Fragrance Journal, No. 6, p. 11, 2000 Japanese Patent Laid-Open No. 10-72324 JP 2000-86454 A US Pat. No. 5,776,443 JP-A-4-279512 JP-A-8-157332

  However, all of these hair repair methods are to repair the cuticle edge part of the hair surface or to make the hair feel temporarily repaired by adsorbing an oil agent on the hair surface, which is the cause of essential damage. The internal cavity could not be repaired or deterred.

  An object of the present invention is to provide a hair cosmetic excellent in the effect of improving hair by repairing or suppressing the generation of cavities generated in the hair during coloring, dryer drying and the like.

  The present inventor, when using a hair cosmetic in which two or more compounds selected from a cationic surfactant, a higher alcohol and an alkylamine are further used in an organic acid and a specific organic solvent in a specific pH range, It has been found that the cavities inside the hair generated during ring, dryer drying, etc. are repaired and suppressed.

  The present invention is selected from (A) an organic acid, (B) an organic solvent selected from polypropylene glycol and propylene carbonate having an average molecular weight of 200 to 700 by GPC, and (C) a cationic surfactant, a higher alcohol and an alkylamine. It is intended to provide a hair cosmetic composition that contains two or more compounds and has a pH of 2.0 to 6.0 (25 ° C.).

  Repairs cavities generated in the hair during coloring, dryer drying, and the like, suppresses the generation of cavities, and has a coherent hair improvement effect that is free from crusting.

  Examples of the organic acid of component (A) used in the present invention include monocarboxylic acid, dicarboxylic acid, hydroxycarboxylic acid, and polycarboxylic acid. Of these, dicarboxylic acids and hydroxycarboxylic acids (particularly α-hydroxycarboxylic acids) are particularly preferable.

  Examples of the dicarboxylic acid include malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, and phthalic acid, and maleic acid is particularly preferable. Examples of the hydroxycarboxylic acid include glycolic acid, lactic acid, hydroxyacrylic acid, oxybutyric acid (particularly α-oxybutyric acid), glyceric acid, malic acid, tartaric acid, citric acid, and the like. Particularly, α-oxycarboxylic acid, particularly lactic acid, Malic acid is particularly preferred.

  Component (A) may be used in combination of two or more, and is 0.1 to 20% by weight (hereinafter simply referred to as%) in the composition, preferably 0.2 to 15%, particularly 0.2 to It is preferable to contain 10%.

  The organic solvent of component (B) used in the present invention has an action of promoting the penetration of component (A) into hair. Specific examples of component (B) include benzyl alcohol, benzyl Examples include oxyethanol, propylene carbonate, and polypropylene glycol. Two or more components (B) may be used in combination. Here, the polypropylene glycol preferably has an average molecular weight (measurement method: GPC) of 200 to 700, particularly 300 to 500.

  Component (B) is contained in the composition in an amount of 0.1 to 20%, preferably 0.5 to 10%, particularly 1 to 10%.

  The component (C) used in the present invention uses two or more compounds among cationic surfactants, higher alcohols and alkylamines. Here, the two types need to be selected from different types of compound groups, and are not selected from the same type of compound groups.

  As a cationic surfactant, the following formula

(In the formula, R ¹ and R ² each independently represent hydrogen, an alkyl group having 1 to 28 carbon atoms, or a benzyl group, except that hydrogen or benzyl group are simultaneously formed. X ⁻ represents an anion.)
Is preferred. Here, when R ¹ and R ² are alkyl groups, the number of carbon atoms is preferably 16 to 24, and particularly preferably 22 and is preferably a linear alkyl group. Examples of the anion X ⁻ include halogen ions such as chlorine ion and bromine ion, and organic anions such as ethyl sulfate and methyl carbonate. Halogen ion, particularly chlorine ion is preferable.

  As the cationic surfactant, a mono long chain quaternary ammonium salt is preferable, and specific examples include cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, aralkyltrimethylammonium chloride, and behenyltrimethylammonium chloride. Behenyltrimethylammonium is preferred.

  As the higher alcohol, those having an alkyl group having 12 to 28 carbon atoms, preferably 16 to 24 carbon atoms, particularly 22 are preferable, and those having a linear alkyl group are particularly preferable.

  Preferable specific examples of the higher alcohol include cetyl alcohol, stearyl alcohol, aralkyl alcohol, behenyl alcohol and the like, and behenyl alcohol is particularly preferable.

  The alkylamine has the following formula:

(In the formula, R ³ represents an alkyl group having 12 to 28 carbon atoms or an R ⁵ CONH (CH ₂ ) _n — group, R ⁵ represents an alkyl group having 11 to 27 carbon atoms, and n represents a number of 1 to 5). R ⁴ represents an alkyl group having 1 to 28 carbon atoms.)
The alkylamine represented by these is mentioned. Here, R ³ is preferably an alkyl group having 16 to 24 carbon atoms, R ⁵ is an alkyl group having 13 to 23 carbon atoms, n is a number having 2 to 4 and R ⁴ is preferably an alkyl group having 1 to 3 carbon atoms.

  Preferred examples of the alkylamine include dimethylstearylamine, dimethylbehenylamine, stearylamidopropyldimethylamine, stearylamidoethyldiethylamine, and dimethylbehenylamine and stearylamidopropyldimethylamine are particularly preferred. These are usually used after neutralization with an acid. Examples of the neutralizing acid include mineral acids such as hydrochloric acid and sulfuric acid, and organic acids such as acetic acid, lactic acid, and malic acid.

  Component (C) is preferably a combination of two or more compounds with a combination of a cationic surfactant and a higher alcohol, an alkylamine and a higher alcohol, and a cationic surfactant, an alkylamine and a higher alcohol. Two or more compounds of the same type may be used in combination.

  Two or more compounds of component (C) have 70 to 100%, preferably 80 to 100% of the same constituent aliphatic hydrocarbon groups, which improves the feeling of use after rinsing or after drying. In terms of point, a behenyl group is particularly preferable.

  The pH of the hair cosmetic composition of the present invention is 2.0 to 6.0 (25 ° C.), and preferably 2.5 to 4.5 in terms of imparting gloss. To adjust the pH, component (A) organic acids such as citric acid and lactic acid, and inorganic substances and basic substances such as sodium hydroxide can be used.

  The hair cosmetic composition of the present invention is preferably a combination of the respective preferred exemplary components (A) to (C).

  The hair cosmetic composition of the present invention can be made into a desired form such as an aqueous solution, an ethanol solution, an emulsion, a suspension, a gel, a liquid crystal, a solid, an aerosol, and the like. Applicable to conditioning mousse, hair mousse, hair spray, shampoo, leave-on treatment, etc. In particular, it is suitable as a dosage form to be used after washing away, such as a hair rinse, a hair conditioner, and a hair treatment.

Among the examples shown below, “Product 2 of the present invention” and “Product 3 of the present invention” in Example 1 and 2 and Example 4 are reference examples and are not included in the scope of the claims. Absent.
Example 1
The hair conditioner shown in Table 1 was prepared, and the measurement results of the void disappearance rate inside the hair and the sensory evaluation results of 20 panelists on the hairiness and unity of the hair are shown in Table 1.

(I) Cavity disappearance rate inside hair Wash 0.5 g of hair bundles damaged by coloring with 1 g of plain shampoo (prepared with polyoxyethylene (2.5) sodium lauryl ether sulfate / diethanolamide), After lightly draining water, 1 g of hair conditioner was applied and allowed to stand for 1 minute, then 4 g was applied and left at 35 ° C. for 15 minutes. Subsequently, after rinsing with running water for 15 seconds, towel drying was performed and hot air drying was performed with a dryer for 1 minute. (This hair treatment corresponds to the continuous use of the hair conditioner for one week every day.) After repeating this hair treatment a total of 4 times, the disappearance rate of the cavities inside the hair before and after the treatment was determined.

Measurement of the cavity Using a simple stereo microscope (WIDE STAND MICRO, PEAK (10X)), light is emitted from the diagonal direction of the hair (angle between the hair axis and the irradiation axis of light from the light source is 15 to 60 degrees). The hair was irradiated, and the hair was observed from the direction perpendicular to the hair axis and in the same plane as the hair axis and the light irradiation axis. By this method, specular reflection light on the hair surface that obstructs the observation can be removed, and only the porous structure of the medulla part of the hair with cavities is observed as whitish streaks in the center of the hair (Fragrance Journal) 6, No. 11, p. 2000). Before the treatment, the total length of the length of the cavity portion observed as whitish streaks in the medulla portion was measured. The same measurement was performed after the treatment, and the disappearance rate or occurrence rate of the cavities was determined from the abundance of the cavities before and after the treatment.

(B) Sensory evaluation by a paneler Hair treatment with a hair conditioner 20 g of hair bundle was thoroughly washed with a plain shampoo (prepared with polyoxyethylene (2.5) sodium lauryl ether sulfate / diethanolamide), then lightly drained, Apply 2g of conditioner. Then, after rinsing with 40 L flowing water at 6 L / min for 30 seconds and towel-drying, it was sufficiently dried with warm air from a dryer for 2 to 3 minutes.

Sensory evaluation An average of the evaluation points based on the following criteria of 20 panelists was taken and ranked.

(1) Passiness 4: No cracking 3: No cracking 2: Slightly cramped 1: Crisp 0: Very crunchy

(2) Units 4: Very good unity 3: Good unity 2: There is unity 1: Some unity is bad 0: Unite is bad

Rank Average evaluation score ◎ 3.5-4.0
○ 3.0-3.4
Δ 2.0 to 2.9
X 1.0 to 1.9
XX 0.0-0.9

  The hair treated with the hair conditioner of the present invention showed significant disappearance of cavities. Moreover, the sensory evaluation that the hair processed with the hair conditioner of this invention did not have a clump and was well-organized was obtained.

Example 2
Using the hair conditioners of the present invention products 1 to 3 and the comparative products 1 to 3 of Example 1, 0.5 g of hair bundles in which no cavities are formed inside the hair are obtained in the same manner as in (a) of Example 1. The hair was treated (however, the hot air drying time with a dryer was 5 minutes). Table 2 shows the results of measuring the incidence of cavities after treatment in the same manner.

  In all of the products of the present invention, no cavities were observed, and a remarkable cavitation suppression effect was recognized. In addition, the hair treated with the hair conditioner of the present invention obtained sensory evaluation that it was easy to collect without being crusted even after 5 to 10 minutes of drying treatment.

Example 3
The following hair conditioner was prepared.
%
Behenyltrimethylammonium chloride (behenyl content 85%) 1.7
Behenyl alcohol (behenyl content 85%) 5.0
Isopropyl palmitate 0.5
Dipentaerythritol fatty acid ester 0.2
Methyl polysiloxane (silicone KHS-3 manufactured by Shin-Etsu Chemical Co., Ltd.) 2.5
Benzyloxyethanol 0.3
PPG400 2.0
Malic acid 0.5
Hydroxyethyl cellulose 0.2
Purified water balance pH3.0

  This conditioner also had a good feel when applied and rinsed, had no dryness after drying, and had good hair consistency. The cavity disappearance rate measured by the same method as in Example 1 was 78%. From this conditioner, except for benzyloxyethanol, PPG400, and malic acid, those that were balanced with purified water and adjusted to pH 5.0 had a cavity disappearance rate of 0%.

Example 4
The hair treatment shown below was prepared.
%
Stearylamidopropyldimethylamine lactate 2.4
Cetanol 7.0
Isopropyl palmitate 1.0
Dipentaerythritol fatty acid ester 0.3
Methyl polysiloxane (silicone KHS-3 manufactured by Shin-Etsu Chemical Co., Ltd.) 2.5
Benzyloxyethanol 0.5
Malic acid 1.0
Hydroxyethyl cellulose 0.2
48% NaOH 0.15
Purified water balance pH 3.3

  This treatment had a good feel from the time of application to rinsing, had no dryness after drying, and the hair was well organized. The void generation rate measured in the same manner as in Example 2 was 0% after 4 weeks of use, and a deterrent effect was observed. In this treatment, except for benzyloxyethanol and malic acid, a balance adjusted with purified water and adjusted to pH 4.5 had a void generation rate of 40% and no deterrent effect was observed.

Claims (4)

(A) maleic acid, an organic acid selected from lactic acid and malic acid, (B) an organic solvent having an average molecular weight by GPC is chosen polypropylene glycol or we are 200-700, and (C) a cationic surfactant, a higher alcohol And a hair cosmetic that contains two or more compounds selected from alkylamines and has a pH of 2.0 to 4.5 (25 ° C.).   A method for repairing cavities generated inside hair using the hair cosmetic composition according to claim 1.   A method for repairing cavities generated in the hair by coloring using the hair cosmetic composition according to claim 1.   A method for inhibiting the generation of cavities inside hair by drying a dryer using the hair cosmetic composition according to claim 1.