JPS63316717A - Permanent wave agent - Google Patents

Abstract

PURPOSE:To obtain a permanent wave agent preventing hair from losing tension, rigidity and elasticity, containing low-molecular weight chitin or chitosan. CONSTITUTION:A permanent wave agent containing 0.01-10wt.%, preferably 0.1-5wt.% low-molecular weight chitin or chitosan having <=5,000mol.wt. obtained from chitin or chitosan by nitrous acid decomposition method, formic acid decomposition method, chlorine decomposition method, enzyme decomposition method or microorganism decomposition method. In the case of a permanent wave agent of two-pack type, the agent is preferably mixed with a second agent.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a novel permanent waving agent that prevents hair from losing firmness, stiffness and elasticity.

[Conventional technology]

Recently, as hair has become fashionable and fashionable, perms,
Hair is often damaged by the use of heat tools such as hair curlers 1 and hair dryers.

In order to prevent such hair damage, it has been proposed to add highly water-retaining polymeric substances, amino acids, peptides, keratin, etc. to hair cosmetic compositions (Japanese Patent Application Laid-Open No. 55-11518). No., Japanese Patent Publication No. 56-79618,
JP-A-56-103106, JP-A-58-67613
No., JP-A-55-94312, JP-A-50-5354
No. 3 and Japanese Unexamined Patent Publication No. 56-92810, etc.). However, when these compositions are used, the hair tends to lose its firmness and elasticity.

In addition, a method of adding glycerin chitosan, amorphous water-soluble partially deacetylated chitin, or quaternary chitosan derivatives to a permanent waving agent has been proposed for the purpose of preventing hair from tangling and imparting elasticity and moisturizing properties. Kaisho 59-8
No. 701, JP-A-60-1110 and JP-A-61-
It is described in Publication No. 190502. However, these effects are not fully satisfactory.

[Problem that the invention seeks to solve]

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a permanent waving agent that prevents damage to hair caused by perming, particularly loss of firmness, stiffness, and elasticity of hair.

[Means for solving problems]

As a result of extensive research to achieve the above object, the present inventors have discovered that by incorporating low-molecular-weight chitin or chitosan into a permanent waving agent, it is possible to prevent loss of hair firmness, stiffness, and elasticity. They discovered this and completed the present invention.

The permanent waving agent of the present invention is characterized by containing low-molecular chitin or chitosan with a molecular weight of 5000 or less, or one of their derivatives, or 2f-It or more.

The permanent waving agent of the present invention is used as a one-part type and a two-part type permanent waving agent, and in the case of a two-part type, it is preferable to mix the above-mentioned low-molecular-weight chitin in the second part. stomach.

The low-molecular-weight chitin or chitosan used in the present invention can be obtained by conventional low-molecular-weighting methods such as nitrite decomposition method, formic acid decomposition method,
Chitin or chitosan can be obtained as a raw material by chlorine decomposition method (Japanese Patent Application No. 59-43282), enzyme or microbial decomposition method, etc.

The amount of low-molecular chitin or chitosan used in the present invention, or a derivative thereof is preferably 0.01 to
10% by weight, particularly preferably 0.1-5% by weight.

If it is less than 0.01% by weight, the effect will not be apparent, and if it exceeds 10% by weight, stickiness tends to increase.

In addition to the above-mentioned essential ingredients, the permanent waving agent of the present invention includes liquid paraffin, petrolatum, solid paraffin,
Hydrocarbons such as squalane and olefin oligomers;
Esters such as isopropyl myristate, isopropyl palmitate, stearyl stearate, octyldodecyl myristate, octyldodecyl oleate, and 2-ethylhexanoic acid triglyceride; humectants such as polyhydric alcohols, PCA-Na; anions, nonions, cations, and Amphoteric surfactants; anionic, nonionic, cationic and amphoteric resins; vitamins A1B6, B1□,
Vitamins C, D, E and H; ultraviolet absorbers; bactericidal agents; cooling agents; pigments, etc. can be blended as auxiliary ingredients.

〔Effect of the invention〕

As described above, the permanent waving agent provided by the present invention has an excellent ability to prevent damage to hair caused by perming, particularly loss of hair's elasticity and stiffness.

〔Example〕

Examples of the present invention will be described below, but prior to that, the test methods used for each side will be explained.

(1) Evaluation of firmness and stiffness A hair bundle (10g, 20c11) that has been shampooed
A permanent wave first agent shown below is sufficiently applied, left at room temperature for 15 minutes, and then washed with water. Furthermore, the second agent was sufficiently applied, left at room temperature for 15 minutes, washed with water, and then air-dried, and sensory evaluation was performed by 20 panelists using the following criteria.

Composition of the first agent (amount shown in weight%) Thioglycolic acid 7.0 Ammonia water Appropriate amount LAS-Na 1.0 EDTA 0.2 Purified water Balance Ammonia water is used to adjust the pH of the composition to 9.3. used. Further, LAS-Na represents sodium linear alkylbenzenesulfonate, and EDTA represents ethylenediaminetetraacetic acid.

Evaluation criteria ◎: Fairly good (over 80% of panelists judged it to be firm, firm, and elastic) 0: Good (60 to 80% of panelists judged it to be firm, firm, and elastic) )Δ; Normal (40
~60% of panelists judged it to be firm, firm, and elastic) ×: Bad (40
(2) Measurement of elasticity Apply the above permanent wave agent sufficiently to shampoo-treated hair bundles (19.2 On) and leave them at room temperature. At 15
Leave it for a minute and wash it with water. After that, the second agent was sufficiently applied, left at room temperature for 15 minutes, washed with water, and then left at 25°C and relative humidity 65% for 24 hours with a dynamic viscoelasticity automatic measuring device (manufactured by Toyo Baldwin, Reopai Bron DDV-I
dynamic elastic modulus (dyn/+l-12) using
was measured.

The measurement conditions are as follows.

Measurement conditions Hair diameter near 0-90uTl Hair length: 2.0crx Frequency: 11Hz <Examples 1-4 and 1-6> 10F shown in Table-1! A composition was prepared, and this was used as a second permanent wave agent to conduct the above-mentioned test. The results are also listed in Table-1. The amounts in the table are weight%.
Indicated by

Considering these results, it was found that those that do not contain chitin or chitosan (Comparative Examples 1 to 3) and those that contain chitin or chitosan but whose molecular weight exceeds 5000 (Comparative Examples 4 to 6) are evaluated for firmness and stiffness. and dynamic elastic modulus are both unsatisfactory. On the other hand, the compositions of the present invention (Examples 1 to 4) containing low-molecular-weight chitin or chitosan are fully satisfactory in both evaluation of firmness and stiffness and dynamic elastic modulus.

<Examples 5 and 6> Permanent wave first agents and second agents having the formulations shown in Tables 2 and 3 were prepared respectively, and the firmness and stiffness were evaluated and the dynamic elastic modulus was measured according to the test method described above. I did this. The results are also shown in Table-2 and Table-3, respectively.

From these results, it is clear that even when the present invention is applied to actual prescription examples, it has sufficiently satisfactory effects.

Table-2 Example 5 Table-3 Example 6

Claims (4)

[Claims] (1) A permanent waving agent characterized by containing low-molecular chitin or chitosan with a molecular weight of 5,000 or less, or a derivative thereof. (2) The permanent waving agent according to claim 1, wherein the low molecular weight chitin or chitosan is obtained from chitin or chitosan by a nitrite decomposition method, a formic acid decomposition method, a chlorine decomposition method, or an enzyme or microbial decomposition method. (3) The permanent waving agent according to claim 1, wherein the amount of the low-molecular-weight chitin or chitosan or a derivative thereof is 0.01 to 10% by weight. (4) The permanent waving agent according to claim 1, wherein the low-molecular-weight chitin or chitosan, or a derivative thereof is incorporated into a second agent of a two-component permanent waving agent.