JP2006273782A - Hair treatment composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hair treatment composition, such as an oxidation hair dye or a bleaching agent, which reduces the damages of hair, smells less than general protein hydrolysates, and has excellent characteristics such as excellent dyeability. <P>SOLUTION: This hair treatment composition, such as the oxidation hair dye or the bleaching agent, contains un-hydrolyzed pure keratin and/or hydrolyzed keratin. The hair treatment composition has excellent dyeability, when used to dye hair, and has an effect for reducing the excessive damages of the hair. The keratin or the hydrolyzed keratin of the present invention has S-sulfonated cysteine in the disulfide portion of the cystine, and the S-sulfonated cysteine reacts with S-sulfonated cysteine produced from the cysteine in hair keratin to recover disulfide bonds and inhibit the production of cysteic acid, thereby reducing the damages of the hair. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a hair treatment composition for treating hair, such as an oxidative hair dye or a decoloring agent for hair.

Conventionally, as a hair dye, there are many two-component oxidative hair dyes comprising a first agent containing an oxidative dye intermediate, an alkali agent, and a second agent containing an oxidant. This hair dye is contained in the second agent in the hair by swelling the hair with an alkaline agent such as ammonia contained in the first agent and allowing the low molecular weight oxidative dye intermediate to penetrate into the hair. By performing oxidative polymerization with an oxidizing agent such as hydrogen peroxide, the color is developed and the hair is dyed. Hydrogen peroxide is decomposed by the alkaline agent blended in the first agent to generate radicals. By this radical, the melanin pigment in the hair is decomposed to lighten the hair, and the hair can be dyed in various colors. There are two types of decoloring agents, a first agent containing an alkaline agent and a second agent containing a second agent containing an oxidizing agent, and a three agent decolorizing agent using an oxidizing substance such as ammonium vortex sulfate as the third agent. . The alkaline agent such as ammonia contained in the first agent swells the hair and facilitates the penetration of the agent. The alkaline agent and the oxidizing agent react to decompose and generate radicals. By this radical, the melanin pigment in the hair is decomposed to decolorize and brighten the hair. In the treatment process of these hair dyes and depigmenting agents, in order to damage the hair excessively, blend protein hydrolysates such as keratin and collagen in order to reduce hair damage and further improve dyeability. Has been proposed. In addition, without adding protein hydrolyzate in the oxidative hair dye or decoloring agent, a protein hydrolyzate having an appropriate molecular weight is applied in combination as a pretreatment agent according to the degree of hair damage before treatment. Various treatments have been proposed and put into practical use.
JP 2000-336020 A

An object of the present invention is to provide a hair treatment composition such as an oxidative hair dye or a depigmenting agent that provides properties such as improving dyeability and preventing excessive damage to hair.

Conventionally, the protein hydrolyzate is blended with the first agent in hair dyes, depigmenting agents, or permanents, and the protein hydrolyzate of an appropriate molecular weight is selected and applied according to hair damage before the treatment. However, as a result of various studies on proteins and the like, in pure keratin not hydrolyzed and hydrolyzed keratin, the disulfide part of cystine in keratin was converted to S-sulfonated cysteine. In addition, by blending 0.01 to 20% by weight at the time of depigmenting agent and oxidative hair dye treatment, cystine disulfide found when conventional hydrolyzed keratin is blended in a highly alkaline blend of decoloring agent and oxidative hair dye The S—S bond of the bond is broken and a low molecular weight compound containing sulfur is not generated and a specific odor is not generated. Hesi found a good effect, such as Someagaru uniform, leading to the development of the present invention.

By blending the keratin according to claims 1, 2, 3, 4, and 5, hair damage is prevented, and the dyeability becomes uniform and improved. In addition, the present invention provides a hair treatment composition such as a decolorizing agent or an oxidative hair dye having characteristics such as a low specific odor that is felt when a protein hydrolyzate is blended.

Hereinafter, the present invention will be described in detail.
The method for producing keratin blended in the present invention will be described below.
Wool keratin is reacted with sodium sulfite to convert cystine in keratin into S-sulfonated cysteine. This is treated with a homogenizer to obtain solubilized keratin. Cystine in this keratin is S-sulfonated cysteine.
Examples of keratin used in the present invention include Keratech IFP-HMW sold by Croda Japan Co., Ltd.
Content in the decoloring agent or oxidative hair dye of this invention is 0.1 to 20.0 weight% in total. Preferably it is 1.0-15.0 weight%.

A method for producing hydrolyzed keratin to be blended in the present invention will be described below.
Wool keratin is reacted with sodium sulfite to convert cystine in keratin into S-sulfonated cysteine. This is obtained by hydrolysis with an enzyme or the like.
Examples of the hydrolyzed keratin used in the present invention include Keratech Pep sold by Croda Japan Co., Ltd.
Content in the decoloring agent or oxidative hair dye of this invention is 0.1 to 20.0 weight% in total. Preferably it is 1.0-15.0 weight%.

Hydrogen peroxide used in depigmenting agents and oxidative hair dyes is decomposed by alkali at the time of treatment, and reacts with cystine in keratin constituting the hair by the generated radicals, so that cysteic acid is converted through S-sulfonated cysteine. Generate. By producing cysteic acid, the hair becomes hydrophilic, the combing of the hair becomes worse, and this is one of the causes of hair strength reduction due to the breakage of the crosslinks (disulfide bonds) between keratin protein fibers. In the keratin or hydrolyzed keratin of the present invention, the cystine moiety is S-sulfonated cysteine, and the S-sulfonated cysteine reacts with S-sulfonated cysteine generated from cystine in hair keratin to restore the disulfide bond. In addition, the production of cysteic acid can be suppressed. In addition to the above, this effect can also be applied to a composition that finally treats hair after hair treatment and conditioner and hair after permanent treatment.

The composition of the present invention is a range that does not impair the effects of the present invention, if necessary, in addition to the essential components, surfactants, natural fats and oils, mineral oils, synthetic esters, humectants, film forming agents, oxidation agents It is possible to mix | blend an inhibitor, antiseptic | preservative, a fragrance | flavor, etc.

EXAMPLES Next, although an Example and a comparative example demonstrate this invention further more concretely and in detail, this invention is not limited by this Example. In addition, all the numerical values described below are% by weight.

The oxidation hair dye 1st agent was adjusted with the prescription of Table 1, and the odor of the 1st agent was evaluated, and the dyeability after hair treatment, leveling property, and hair damage were tested. The evaluation of odor by 10 panelists, the tensile strength of the hair and the stability test at 40 days are summarized in Table-2. The oxidative hair dye blended with Keratech IFP-HMW and / or Keratech Pep was stable after 20 days without precipitation or separation of crystals and without a specific odor as compared with commercially available hydrolyzed keratin. In addition, there are excellent effects such as good results of dyeing and leveling after treatment, and results of less hair damage.

Evaluation of stability of evaluation items:
The first agent is left and stored in a thermostat at a temperature of 40 ° C. The appearance properties after 30 days of storage were visually evaluated.
Odor evaluation:
After adjusting the first agent, the odor of the obtained first agent was evaluated according to the following criteria.
Evaluation Evaluation index ◎ Feels no specific odor derived from hydrolyzed keratin.
○ Slightly smells of odor derived from hydrolyzed keratin.
△ I feel the smell of hydrolyzed keratin.
X: The specific odor of hydrolyzed keratin is remarkably strong.
Evaluation of dyeability:
The first agent and a 6% aqueous solution of hydrogen peroxide were mixed at a weight ratio of 1: 1, and 10 g of the resulting mixture was applied to a white hair bundle (BM-W) made by Beaulux, having a length of 10 cm and a weight of 1 g. After leaving at a temperature of 30 ° C. for 20 minutes, rinse thoroughly with warm water, shampoo and dry with a dryer. The dyeability was visually evaluated according to the following criteria.
Evaluation Evaluation standard ◎ It is dyed deeply in orange.
○ It is dyed orange.
△ Not very dyed.
× Almost not dyed.
Evaluation of leveling:
The first agent and a 6% aqueous solution of hydrogen peroxide were mixed at a weight ratio of 1: 1, and 10 g of the resulting mixture was applied to a white hair bundle (BM-W) made by Beaulux, having a length of 10 cm and a weight of 1 g. After leaving at a temperature of 30 ° C. for 20 minutes, rinse thoroughly with warm water, shampoo and dry with a dryer. The following criteria were used for visual evaluation.
Evaluation Evaluation standard ◎ There is no unevenness and it is dyed uniformly.
○ There is almost no unevenness and it is dyed uniformly.
△ Somewhat uneven.
× There is unevenness.
Hair damage assessment:
Prepare a human hair bundle having a length of 15 cm and a length of 5 g, apply 20 g of the adjusted hair straightener, let it blend, and let stand at a temperature of 30 ° C. for 15 minutes. After 15 minutes, rinse with lukewarm water, dry with towels, place the hair straight on a glass plate and stick them with tape etc., then immerse them in a 6% aqueous solution of sodium bromate at 30 ° C. Let stand for 15 minutes. After 15 minutes, the hair is taken out, rinsed with warm water, then towel-dried, and left to dry in an environment of 20 ° C. and 65% humidity for 48 hours. Evaluation of hair damage evaluation by measuring the maximum instantaneous stress at which hair is cut with a tensile tester (INSTRON 5569 type) after 48 hours Measured value ◎ Stress 1.4N or more ○ Stress 1.2-1.4N
△ Stress 1.0 ~ 1.2N
× Stress 1.0N or less

Claims (5)

A hair treatment composition suitable for an oxidative hair dye or a decoloring agent containing 0.01 to 20.0% by weight of keratin and / or hydrolyzed keratin, respectively. The composition for hair treatment suitable for an oxidative hair dye or a decoloring agent according to claim 1, wherein the keratin contained is an unhydrolyzed keratin. The molecular weight of keratin is 30,000-60,000, The composition for hair treatment suitable for the oxidative hair dye or the decoloring agent etc. of Claim 1, 2. The hair treatment suitable for an oxidative hair dye or a decoloring agent according to claim 1, 2 or 3, wherein at least a part of cystine contained in the keratin and hydrolyzed keratin is present as S-sulfonated cysteine. Composition. The molecular weight of hydrolyzed keratin is 3-4000, The composition for hair treatment suitable for the oxidative hair dye or the decoloring agent etc. of Claim 1, 2, 3, 4 characterized by the above-mentioned.