JPH0667820B2 - Hair modifier composition - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a hair modifier composition, and more particularly, to a hair modifier in which a single treatment improves the hair quality over a long period of time by changing the chemical structure of the hair. The present invention relates to a substance composition.

BACKGROUND OF THE INVENTION Various hair treating agents containing a moisturizing agent, a conditioning agent and the like have been used in the past in order to impart flexibility, luster, strain and the like to hair. However, these hair treatment agents exhibit their effects by adsorbing moisturizing agents, conditioning agents and the like to the hair surface, and are only temporary treatments where the effects are easily lost by washing the hair. Therefore, especially for people with bristly hair or soft hair, which requires a lot of time and labor for hair styling, a troublesome treatment must be repeated every time hair is washed, and such a hair treatment agent is completely satisfactory. Not a thing. Therefore, there is a demand for the development of a hair modifier composition that improves hair quality for a long period of time by a single treatment and that allows easy hair styling.

As a result of intensive studies on hair quality improvement in view of the present situation, the present inventors have found that a composition containing a specific compound having a specific group in its molecular structure as an active ingredient can provide hair quality with a single hair treatment. Is improved over a long period of time, and has flexibility, luster,
The present invention has been completed by discovering that hair having a brush and the like can be easily adjusted.

DISCLOSURE OF THE INVENTION The present invention provides a hair-modifying composition comprising a compound having a linear alkyl group or an aromatic group in the molecular structure together with an aldehyde group as an active ingredient.

According to the hair quality modifier composition of the present invention, the hair quality is improved for a long period of time by a single treatment, and it is possible to obtain hair that has softness, luster, firmness, etc. and is easy to prepare. It is presumed that this is due to a chemical reaction between the thiol group in the hair protein and the aldehyde group in the formulation component of the composition of the present invention.

The compound having a linear alkyl group or an aromatic group together with an aldehyde group in the molecular structure used in the present invention includes vanillin, cinnamaldehyde, cinnamaldehyde derivatives or alkylaldehyde, and preferably vanillin, cinnamaldehyde, hexylcinnamaldehyde. , Amylcinnamaldehyde or linear alkyl aldehyde (alkyl has 8 to 22 carbon atoms). The blending amount is 0.5 to 20% by weight, preferably 1.0 to 10% by weight based on the total amount of the composition. If the amount is less than 0.5% by weight, the desired effect cannot be obtained, while on the other hand, 20% by weight
If the amount is larger, the odor peculiar to aldehydes is not practical.

The hair modifier composition of the present invention can be prepared by appropriately mixing and dissolving the respective components to prepare a dosage form such as lotion, emulsion or foam according to a conventional method, and further, if desired, impairing the effects of the present invention. You may mix | blend a solubilizer, an emulsifier, a fragrance | flavor, a coloring agent, a preservative, a conditioning agent, a moisturizer etc. in the range which does not exist.

As a method of using the hair modifier composition of the present invention, for example, after applying to hair after washing, it is left standing for a certain period of time to wash away, or applied to hair after being treated with reduction of thioglycolic acid or the like, For example, it may be washed after leaving it for a certain period of time. In addition, you may heat slightly while leaving.

Experiment Next, the results of tests on the reactivity of aldehyde groups with alanine, cysteine and its derivatives, which are the constituent amino acids of keratin, which is a structural protein of hair, and the reactivity of thiol groups and aldehyde groups present in hair are shown.

(1) Reactivity of alanine, cysteine and its derivative with aldehyde group 1 mmol of alanine, cysteine or its derivative was dissolved in 2.5 ml of ethanol or water. Vanillin 1
While stirring a solution of millimoles dissolved in 2.5 ml of ethanol,
Added at room temperature. After 20 minutes, using n-butanol / acetic acid / water (4: 1: 1) as a developing solvent, the mixture was subjected to thin-layer chromatography and then developed with ninhydrin, and the Rf values of the spots before and after the reaction were compared. Reactivity was checked by standard.

Reactive: A spot with a new Rf value appeared after the reaction.

No reactivity: The Rf value of the spot did not change before and after the reaction.

The results are shown in Table 1.

As is clear from Table 1, the aldehyde group reacts with the thiol group and does not react with the amino group, the carboxyl group or the methyl group. It is considered that the same reaction occurs in the keratin protein in hair.

(2) Reactivity of thiol groups and aldehyde groups present in hair 6.7% ammonium thioglycolate aqueous solution 50 ml (pH 8.
2 g of hair (hair of a Japanese girl) was soaked in 6) for 10 minutes, then washed with water, 5% citric acid solution, and water, and then soaked in 50 ml of vanillin or cinnamaldehyde ethanol solution for 10 minutes. After washing with water, it was towel-dried, immersed in a 0.14% methylene blue solution for 5 minutes, and then washed again with water. The obtained dyed hair was cut to a thickness of 2 mμ and the cross section was observed with an optical microscope to examine the degree of dyeing. As a comparison, the degree of dyeing was also examined for the hair before treatment and the hair after soaking in the 6.7% ammonium thioglycolate aqueous solution for 10 minutes. The results are shown in Table 2.

Many disulphide bonds are present in the hair-constituting protein, and when the hair is treated with a reducing agent such as thioglycolate, the bonds are cleaved to generate a thiol group. Such a thiol group is a reducing group and dyes hair in the presence of methylene blue (see treatment number 2). However, as is clear from Table 2, when hair treated with thioglycollate is further treated with aldehydes, the degree of dyeing is reduced and the presence of free thiol groups is reduced.
This indicates that the thiol group is reacting with the aldehyde group together with the result of the experiment (1). It is presumed that the thioacetal represented by is formed. Due to such chemical changes, the changes in hair quality caused by the composition of the present invention are connected for a long period of time.

EXAMPLES Next, the present invention will be described in more detail with reference to Examples.

Examples 1 to 17 Ingredients% by weight Aldehyde derivative (described in Table 3) Described in Table 3 Polyoxyethylene hydrogenated castor oil 0.3 Glycerin 1.5 95% Ethyl alcohol 60.0 Fragrance Suitable amount Ion-exchanged water 100 Adjusted perfume to polyoxyethylene Third, dissolved in castor oil
Add to the solution of the aldehyde derivative shown in the table and 95% ethyl alcohol and stir well. Then, glycerin and ion-exchanged water are added, and the mixture is further stirred to produce a hair modifier composition.

The hair treated with the composition thus obtained was evaluated.

That is, 20 g of hair swatch (hair of the same Japanese girl) was immersed in 200 ml of a 6.7% ammonium thioglycolate solution (adjusted to pH 8.6 with ammonia) for 15 minutes. Then rinse with water, dry with a towel, and add 1 to 200 ml of the above composition.
After soaking for 5 minutes, (1) it was thoroughly rinsed and dried, or (2) it was washed 5 times with a 10% sodium lauryl sulfate solution and thoroughly rinsed and dried.

Then, using a solution prepared in the same manner as described above except that an aldehyde derivative was not added, a hair swatch treated in the same manner as described above was used as a control for softening hair, hardening hair, elasticity, suppleness and lubricity. The degree was evaluated according to the following criteria by professional panelists in four levels.

⊚: Clearly significant difference is recognized as compared with the control.

◯: A significant difference is recognized as compared with the control.

Δ: A little significant difference is recognized as compared with the control.

X: No significant difference is recognized compared to the control.

Furthermore, practicality and overall evaluation were evaluated according to the following criteria.

Practicality ⊚: The effect does not change even after washing the hair, and is considered to be sufficiently practical.

◯: The effect disappears slightly after selection, but it is considered to be practical.

X: The effect disappears after washing hair, or it has other inconvenient properties such as odor and is not practical.

Comprehensive evaluation ⊚: It has an excellent hair modifying effect and is practical.

◯: It has a hair-modifying effect and is practical.

X: A hair-modifying effect cannot be expected, or it has other practically inconvenient properties such as odor.

As is clear from Table 3, when the aldehydes are blended in an amount of 0.5 to 20% by weight based on the total amount of the composition, a practical hair modifier composition can be obtained. Further, depending on the type of aldehyde to be blended, there are those that soften the hair and those that harden.For example, a vanillin or alkyl aldehyde compounding composition exhibits a hair softening action, while a cinnamaldehyde compounding composition It can be seen that it exhibits a curing action.

Example 18 Ingredients% by weight vanillin 3.00 self-emulsifying glyceryl monostearate 3.00 cetanol 1.00 oleyl alcohol 2.00 liquid paraffin 8.00 carboxyvinyl polymer 0.25 perfume proper amount potassium hydroxide (1% aqueous solution) 12.5 self-emulsifying monostearin Glycerin acid, cetanol,
A mixture of oleyl alcohol and liquid paraffin was dissolved at 80 ° C., a mixture of carboxyvinyl polymer and ion-exchanged water was heated to 80 ° C., and the mixture was subjected to 2000 rpm / min high speed strong shearing for 5 minutes. Then, cool down to 40 ℃
Add flavor and vanillin (adjusted to 20% aqueous solution) at 38 ℃,
After sufficiently stirring, a milky liquid hair modifier composition was obtained.

Example 19 Ingredients wt% Dotesyl aldehyde 3.00 Polyoxyethylene hydrogenated castor oil 0.30 Propylene glycol 5.00 Protein hydrolyzate 0.05 95% Ethyl alcohol 50.00 Fragrance Suitable amount Ion-exchanged water 100 Dissolved perfume in polyoxyethylene hydrogenated castor oil, Next, ion-exchanged water was added, and propylene glycol, protein hydrolyzate and dodecyl alcohol 95% were added with stirring.
% Ethanol solution was sequentially added to obtain a lotion-shaped hair modifier composition.

Example 20 Stearic acid, cetanol, polyethylene glycol monostearate (23E.O.), neopentyl glycol di-2-ethylhexanoate, beeswax, monoisoglutearate monoisostearate A mixture of hydrogenated castor oil is dissolved at 80 ° C. A solution of polyvinylpyrrolidone, glycerin, polyethylene glycol (300E.O.), acylglutamine soda, triethanolamine, and ion-exchanged water.
The mixture was added at 80 ° C., and 2000 rpm / minute high-speed rotation strong shearing was performed for 5 minutes. After cooling, the fragrance and cinnamaldehyde were added at 40 ° C., and the mixture was thoroughly stirred. An appropriate amount of the obtained emulsion and Freon 12 gas was filled in a container to obtain a mousse-shaped hair modifying composition.

Claims (1)

[Claims] 1. An active ingredient containing 0.5 to 20% by weight of a compound selected from the group consisting of vanillin, cinnamaldehyde, cinnamaldehyde derivatives, alkyl aldehydes having 8 to 22 carbon atoms, and mixtures of two or more thereof. A hair improving composition for hardening or softening hair.