JP3402729B2 - Hair cosmetics - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair cosmetic composition, and more particularly to a hair cosmetic composition having a high effect of absorbing ultraviolet rays on the hair and excellent in the durability of the effect.

[0002]

2. Description of the Related Art Hair cosmetics having a so-called rinsing effect of imparting smoothness and gloss to hair and improving combability are generally used for hair rinse, hair treatment,
It is marketed under the name of hair conditioner. These hair cosmetics are usually blended with a quaternary ammonium salt, which is known to give the above-mentioned rinsing effect when adsorbed on the hair. further,
For the purpose of improving after-use feeling such as smoothness, gloss and moistness, for example, an oil component such as higher alcohol, glycerin monofatty acid ester, higher fatty acid, liquid paraffin, solid paraffin, ester oil or silicone oil is added. .

Recently, hair cosmetics containing various ultraviolet absorbers have been developed for the purpose of protecting the hair from ultraviolet rays.

[0004]

However, in the conventional hair cosmetics, the effect of protecting the hair from ultraviolet rays is not always satisfactory. In particular, when using, in a hair cosmetic of the type that is rinsed with hot water or the like after application to the hair during use, with the mere addition of a UV absorber, the UV absorber is almost washed out by rinsing, and the hair after rinsing is rinsed. The remaining amount of the ultraviolet absorber of 1 is extremely small, and there is a problem that the expected ultraviolet absorbing effect cannot be obtained sufficiently.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hair cosmetic of a type that is rinsed after being applied to hair during use.
It is an object of the present invention to provide a hair cosmetic composition capable of allowing a large amount of an ultraviolet absorber to remain on hair even after rinsing with hot water or the like, thereby protecting the hair from ultraviolet rays for a long time.

It is disclosed in JP-A-61-286311 and JP-A-4-305516 that an ultraviolet absorber can be added and blended as an optional component into a hair cosmetic composition. However, in these documents, there is no description or suggestion of protecting the hair from ultraviolet rays for a long time by increasing the residual amount of the ultraviolet absorbent on the hair after rinsing.

[0007]

In order to solve the problems of the above-mentioned conventional examples, the present inventor has conducted diligent research on various combinations of existing hair cosmetic ingredients and various ultraviolet absorbers. As a result, by combining a specific quaternary ammonium salt and a higher alcohol in a specific ratio with a UV absorber that is liquid at room temperature, the UV absorber hair after rinsing with hot water etc. The present invention has been completed based on the finding that the residual amount of the can be increased.

That is, according to the present invention, (A)

[0009]

[Chemical 2] (In the formula, R ₁ represents an alkyl group having 14 to 22 carbon atoms or a hydroxyl group; R ₂ , R ₃ and R ₄ each independently represent an alkyl group having 1 to 3 carbon atoms, a hydroxyl group or a benzyl group. X represents a halogen atom or an alkylsulfuric acid group having 1 to 2 carbon atoms), and (B) a linear alkyl group having 14 to 22 carbon atoms. And (C) one or more UV absorbers which are liquid at room temperature (however, 2-butyl-2,4-butane).
(Containing no diol ), the amount of the component (A) is 0.1 to 5.0% by weight of the total amount of the hair cosmetic, and the component (B) is blended with the component (A). There is provided a hair cosmetic composition having a molar ratio of 4 to 15 and an amount of the component (C) of 0.01% by weight or more based on the total amount of the hair cosmetic composition. According to the present invention, the method further comprises a step of applying the hair cosmetic composition to the hair and a step of rinsing the hair after the application, to improve the UV absorber residual property on the hair after the rinsing step, and A method of treating hair is provided which protects the hair from the effects of.

The respective constituents of the hair cosmetic composition of the present invention will be described in detail below.

The quaternary ammonium salt of the component (A) used in the present invention is represented by the above chemical formula 2. In chemical formula 2,
R ₁ represents an alkyl group having 14 to 22 carbon atoms or a hydroxyl group, and this carbon number is more preferably 16 to 22.
Is. When R ₁ is an alkyl group, examples thereof include a cetyl group, stearyl group and behenyl group, and when it is a hydroxyalkyl group, examples thereof include 12-hydroxystearyl group. Of these, stearyl, behenyl and the like are particularly preferable as R ₁ .
R ₂ , R ₃ and R ₄ each independently have 1 to 3 carbon atoms.
Represents an alkyl group, a hydroxyl group or a benzyl group, and specifically includes a methyl group, an ethyl group, a propyl group, a hydroxymethyl group, a hydroxyethyl group, a hydroxypropyl group and the like. Among them, a methyl group, an ethyl group, a propyl group A group, a hydroxyethyl group, a hydroxymethyl group and the like are preferable. R ₂ , R ₃ and R ₄ may be the same as or different from each other. X represents a halogen atom or an alkylsulfate group having 1 to 2 carbon atoms,
Specifically, chlorine, bromine, iodine, fluorine, methyl sulfate, ethyl sulfate and the like are exemplified, and among them, chlorine and bromine are preferable.

Examples of the quaternary ammonium salt of the component (A) include cetyl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, behenyl dimethyl hydroxyethyl ammonium chloride, stearyl dimethyl benzyl ammonium chloride, cetyl triethyl ammonium. Methyl sulfate and the like can be mentioned, and particularly stearyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, stearyl dimethyl benzyl ammonium chloride and the like are preferably used.

The quaternary ammonium salt may be used alone or in combination of two or more.

The component (B) used in the present invention is
It is a higher alcohol having a linear alkyl group having 14 to 22 carbon atoms. This carbon number is more preferably 16 to 2
It is 2. Examples of the component (B) include cetyl alcohol, stearyl alcohol, behenyl alcohol and other aliphatic alcohols. As the component (B), the above-mentioned higher alcohols may be used alone or in combination of two or more kinds. For example, cetostearyl alcohol (C ₁₆ / C) used by mixing cetyl alcohol and stearyl alcohol is used. _A preferable example is a weight ratio of ₁₈ to 0.3 to 3.0).

The component (C) used in the present invention is
It is a UV absorber that is liquid at room temperature. Here, the ultraviolet absorber that is liquid at room temperature refers to an ultraviolet absorber that exhibits fluidity at a temperature of 20 ° C. As the component (C),
Specifically, salicylic acid-based UV absorbers such as homomenthyl salicylate and octyl salicylate; methyl-2,
Cinnamic acid-based UV absorbers such as 5-diisopropylcinnamate, ethyl-2,4-diisopropylcinnamate, isopropyl-p-methoxycinnamate and octyl-p-methoxycinnamate; octyldimethyl-p-aminobenzoic acid and the like Examples thereof include benzoic acid type ultraviolet absorbers.

In the component (C), these ultraviolet absorbers which are liquid at room temperature may be used alone or in combination of two or more.

In the hair cosmetic composition of the present invention, it is necessary to mix the above-mentioned components (A), (B) and (C) in a specific quantitative relationship.

The amount of the component (A) composed of one or more of the quaternary ammonium salts represented by the chemical formula 2 is
It is necessary to be 0.1 to 5.0% by weight, and more preferably 0.6 to 3.0% by weight based on the total amount of the hair cosmetic composition. This is because if it is less than 0.1% by weight, the rinse effect as a hair cosmetic cannot be sufficiently obtained, while on the other hand, 5.0% by weight
This is because the viscosity of the hair cosmetic composition becomes too high when the blending amount exceeds 10.

Further, the component (B) needs to be blended so that the blending molar ratio [(B) / (A)] with respect to the component (A) is 4 to 15, and more preferably 4 to 10.
Is. When the blending molar ratio is less than 4 , the residual rate of the ultraviolet absorber (component (C)) on the hair after rinsing is not sufficient when the hair cosmetic is used, while when the blending molar ratio exceeds 15, This is because there is a tendency for the stability of hair cosmetics to decrease, such as precipitation of higher alcohols (component (B)).

The blending amount of the component (C) must be 0.01% by weight or more based on the total amount of the hair cosmetic composition. 0.01
This is because if the amount is less than wt%, sufficient effect for protecting the hair from ultraviolet rays cannot be obtained.

In the present invention, if necessary, any other additive component usually used in hair cosmetics can be blended as long as the effect of the present invention is not impaired. Examples of these additional components include chain silicone, cyclic silicone, high molecular weight silicone, isoparaffin hydrocarbon, solid paraffin, oils such as ester oil; propylene glycol, glycerin, 1,3-butylene glycol, sorbitol, lactic acid, lactic acid. Moisturizers such as sodium and sodium pyrrolidonecarboxylate; water-soluble polymer substances such as methylcellulose, hydroxyethylcellulose, polyvinyl alcohol, carboxyvinyl polymer, carboxymethylcellulose, polyvinylpyrrolidone; polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl ether, poly Oxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, alkyl sulfate ester, alkyl phosphate ester, fatty acid alkali metal salt, etc. Ionic surface active agent;
Amphoteric surfactants such as 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine and betaine trialkylamine acetate; natural extracts of animals and plants and their derivatives; organic acids such as citric acid and lactic acid; sodium chloride, Inorganic salts such as potassium chloride; fragrances; pigments; paraoxybenzoic acid esters, benzoic acid, sodium benzoate, sorbic acid, potassium sorbate, preservatives such as phenoxyethanol; chelating agents such as EDTA-3Na.

The hair cosmetics referred to in the present invention mean any cosmetics used for the hair, and in particular, cosmetics that impart a conditioning effect to the hair, such as hair rinses, hair treatments and hair packs, while using it,
A type of hair cosmetic that is applied to hair and thoroughly blended on the entire surface, and then rinsed off with hot water or the like.

[0023]

By blending the quaternary ammonium salt of the above component (A), the higher alcohol of the above component (B), and the ultraviolet absorber of the above component (C) in a specific quantitative relationship, (A) and component (B) are adsorbed on the hair as monomolecules at almost the same ratio as the compounding ratio, and the component (C) for this monomolecular film
It is considered that the component (C) remains on the hair in a considerable amount even after rinsing because it has a very high adsorptivity. Therefore, at the time of use, the residual rate of the ultraviolet absorber on the hair can be increased even after applying it to the hair and rinsing it with hot water or the like.

[0024]

The present invention will be described in more detail based on the following examples, but the invention is not intended to be limited thereto. The blending amount (%) is% by weight.

Further, in the following examples, the hair treatment conditions, the determination of the residual rate of the ultraviolet absorber on the hair, and the evaluation of the residual rate for each sample were carried out as follows. [Conditions for Treatment of Hair by Sample] Application of Sample: 10 g of hair strands were wetted with water, and 2.5 g of each sample was applied to the strand, and the whole was made to fit well. Rinsing: tap the hair strand coated with the sample with tap water 10
Place in 100 ml (40 ° C), shake for 2 minutes, rinse (10
5 times / minute). Replace this with tap water for a total of 3
Repeated times. Drying: After drying with a dryer, it was dried overnight in a desiccator. [Determination of residual rate of ultraviolet absorber on hair] The residual rate of the ultraviolet absorber remaining on the hair was determined by the following method. (1) The adsorbate was extracted by Soxhlet extraction from the hair strand treated with each sample by the above method (dichloromethane / methanol = 92/8 vol%, 25 h
r extraction). (2) Concentrate the extract once, and then use a solvent (95% ethanol solution) that dissolves each UV absorber to a certain amount (Am
l) (3) The absorbance distribution (wavelength-absorbance) of this ethanol solution was measured with a spectrophotometer. (4) The area (wavelength × absorbance) X _i of this portion was measured from the absorbance in the ultraviolet region of 290 nm to 320 nm. (5) Separately from this, 2.5 g of each sample itself was dissolved in the above solvent to make Aml, filtered with a Millipore filter, and the absorbance distribution was measured to measure the ultraviolet ray range 290 to 320 n.
The (wavelength × absorbance) area Y _i of m was measured. (6) The residual rate R _i of the sample i on the hair was determined by the following equation.

R _i = X _i / Y _i × 100 (%) [Evaluation of Residual Rate] The residual rate of the ultraviolet absorber on the hair determined as described above was evaluated as follows.

R _i <5 (%) ··· × (residual effect is bad) 5 ≦ R _i <15 (%) ··· Δ (remaining effect is average) 15 ≦ R _i <25 (%) ··· ○ (residual effect) Good) 25 ≦ R _i (%) ⊚ (Best residual effect) Example 1 A hair rinse agent was prepared according to the composition shown in Table 1. (Preparation Method) The quaternary ammonium salt shown in Table 1 was dissolved in ion-exchanged water with heating under stirring (aqueous phase), and an ultraviolet absorber was added while heating and mixing cetostearyl alcohol, fragrance and the like, The mixture was heated and stirred (oil phase).
After keeping both at 80 ° C., the aqueous phase was gradually added to the oil phase while thoroughly stirring and mixing, and when the whole amount was added, emulsify with a homomixer until uniform and then cooled to 30 ° C. with stirring water cooling. The sample shown in FIG.

The results evaluated according to the above are shown together.

[0029]

[Table 1] As is clear from Table 1, in the present invention, the molar ratio of cetostearyl alcohol / stearyltrimethylammonium chloride (molar ratio of component (B) to component (A)).
Should be in the range of 4 to 15. Even if the component (C) is mixed with a liquid ultraviolet absorber at room temperature, if the molar ratio is out of the range of 4 to 15 (Comparative Samples 3 and 4), the residual rate becomes low. You can see that Example 2 A hair rinse agent was prepared in the same manner as in Example 1 with the composition shown in Table 2. The results evaluated according to the above are shown together.

[0030]

[Table 2] As is clear from Table 2, the ultraviolet absorbent of the component (C) of the present invention needs to be liquid at room temperature,
When the semi-solid to solid ones were blended at room temperature (Comparative Samples 1, 2, 3, 4), the residual rate on the hair was not satisfactory. Example 3 A hair rinse agent having the following formulation was prepared and evaluated in the same manner as in Examples 1 and 2 above.

[0031] Ingredient wt% cetyltrimethylammonium chloride 0.6 cetostearyl alcohol _{(C 16 / C 18 = 6} /4) 4.0 isopropyl -p- methoxycinnamate 2.0 Dimethyl polysiloxane (n = 3000) 3 0.0 Cyclic silicone pentamer 15.0 Glycerol monostearate 1.0 Stearic acid 0.5 Glycerin 5.0 Propylene glycol 5.0 Yellow-4 (pigment) Appropriate amount Perfume Appropriate amount Methylparaben (= methyl paraoxybenzoate) Appropriate amount EDTA-3Na (chelating agent) Appropriate amount Ion-exchanged water Amount that makes the total 100% This hair rinse agent has a linear higher alcohol / mono long-chain alkyl quaternary ammonium salt (molar ratio) of 8.43.
In addition, 2.0% by weight of isopropyl-p-methoxycinnamate, which is a liquid UV absorber at room temperature, is added, and the residual ratio of the UV absorber on the hair is high even after rinsing, and the residual effect is obtained. Was excellent. Example 4 A hair treatment cream having the following formulation was prepared and evaluated by the same method as each of the above-mentioned examples.

[0032] Ingredient wt% behenyltrimethylammonium chloride 3.0 cetostearyl alcohol _{(C 16 / C 18 = 7} /3) 6.5 behenyl 2.0 Dimethyl polysiloxane 5cs 3.0 isopropyl -p- methoxycinnamate 0 1 2-octyldodecanol 2.0 Polyoxyethylene hydrogenated castor oil derivative 0.3 (60 mol ethylene oxide adduct) Polyoxyethylene stearyl ether 1.0 (4 mol ethylene oxide adduct) Soybean lecithin 0.5 Glycerin 10. 0 Dipropylene glycol 5.0 Yellow-4 (pigment) Appropriate amount Fragrance Appropriate amount Methylparaben (= methyl paraoxybenzoate) Appropriate amount EDTA-3Na (Chelating agent) Appropriate amount Ion-exchanged water 100% of the total amount of this hair treatment cream , Linear higher alcohol / mono long-chain alkyl type quaternary ammonium salt (molar ratio) is 4.27, and isopropyl-p-methoxycinnamate, which is a UV absorber that is liquid at room temperature, is 0.2.
1% by weight was blended, and the residual rate of the ultraviolet absorbent on the hair was high even after rinsing, and the residual effect was excellent.

[0033]

As described in detail above, according to the present invention,
By blending the quaternary ammonium salt of the above component (A), the higher alcohol of the above component (B), and the ultraviolet absorber of the above component (C) in a specific quantitative relationship, hair during use It is possible to increase the residual rate of the ultraviolet absorber on the hair even after rinsing with water and rinsing with hot water or the like, and thus, it is possible to obtain a hair cosmetic that can protect the hair from ultraviolet rays for a long time.

Continuation of the front page (56) Reference JP-A-7-118127 (JP, A) JP-A-5-186322 (JP, A) JP-A-4-312513 (JP, A) JP-A-5-4910 (JP , A) JP 3-130213 (JP, A) JP 7-33628 (JP, A) JP 7-196457 (JP, A) JP 7-196456 (JP, A) JP 6-72832 (JP, A) JP-A-6-305938 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A61K 7/06 A61K 7/42

Claims (2)

(57) [Claims] 1. (A) The following chemical formula 1 (In the formula, R ₁ represents an alkyl group having 14 to 22 carbon atoms or a hydroxyl group; R ₂ , R ₃ and R ₄ each independently represent an alkyl group having 1 to 3 carbon atoms, a hydroxyl group or a benzyl group. X represents a halogen atom or an alkylsulfuric acid group having 1 to 2 carbon atoms), and (B) a linear alkyl group having 14 to 22 carbon atoms. And (C) one or more UV absorbers which are liquid at room temperature (however, 2-butyl-2,4-butane).
(Not containing diol ) and the amount of the component (A) is 0.1 to 5.0 of the total amount of the hair cosmetic.
% Of the component (B) with respect to the component (A)
The hair cosmetic composition has a compounding molar ratio of 4 to 15 and the amount of the component (C) is 0.01% by weight or more based on the total amount of the hair cosmetic composition. 2. A step of applying the hair cosmetic composition according to claim 1 to hair, and a step of rinsing the hair after the application, to improve the ultraviolet absorbent remaining on the hair after the rinsing step. A method of treating hair, which protects the hair from the effects of UV rays.