JPH0645525B2 - Hair treatment agent - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hair treatment agent such as a hair rinse and a hair treatment, and more specifically, it produces pearl-like crystals with an amphoteric surfactant, a polypeptide, stearyl alcohol and behenyl alcohol. And the appearance is beautiful,
The present invention relates to a hair treatment agent having excellent storage stability and an excellent hair finishing effect.

(Prior Art) For the purpose of increasing the commercial value of shampoo, conditioner, lotion, etc., the appearance is made pearly.

As a so-called pearl luster agent, fish scale foil, mica, or higher fatty acid or its salt, and crystalline substances such as ethylene glycol higher fatty acid ester have been used for a long time.

Among these, the most widely used pearlescent agent in recent years is a crystal substance of an ester of a polyhydric alcohol such as ethylene glycol and a higher fatty acid as described in, for example, JP-A-57-156409. Is. However, these require complicated steps such as preliminarily preparing ethylene glycol higher fatty acid esters as a pearling agent and compounding into the composition, and in order to impart a beautiful pearly luster to the composition for hair. When it was mixed in a large amount, it had a defect that the hair finishing effects (hair moisturizing feeling, smoothness of hair, combability) described below deteriorated.

DISCLOSURE OF THE INVENTION In such a situation, the present inventor provides a hair treatment agent such as a hair rinse and a hair treatment which has a beautiful appearance and imparts a pearly luster excellent in storage stability and has an excellent hair finishing effect. As a result of earnest studies for the purpose of obtaining the above, it was found that a hair treatment agent containing a specific amphoteric surfactant and a polypeptide described below, and stearyl alcohol and behenyl alcohol as essential components can achieve the above object. Completed the invention.

(Object of the Invention) That is, an object of the present invention is to provide a hair treatment agent which is excellent in pearl luster, storage stability and hair finishing effect.

(Structure of the Invention) The present invention relates to (A) a bis (2-alkyl-N-hydroxyethylimidazoline) chloroacetic acid complex type amphoteric surfactant (provided that
(Alkyl group is a long chain having 11 to 21 carbon atoms) 0.5 to 10% by weight, (B) average molecular weight 200 to 5,
000 polypeptide 1.0 to 12% by weight, (C) stearyl alcohol 0.1 to 10% by weight, (D) behenyl alcohol 0.15 to 15% by weight, and the content of stearyl alcohol and behenyl alcohol A hair treatment composition with a ratio of 1: 1.5 to 1: 4.5.

(Specific description of constitution) The amphoteric surfactant which is the component (A) of the present invention is a bis (2-alkyl-N-hydroxyethylimidazoline) chloroacetic acid complex type amphoteric surfactant (where the alkyl group is a carbon atom). At least one of the long chains of the numbers 11 to 21) is applied.

(A) For example, bis (lauryl-N-hydroxyethylimidazoline) chloroacetic acid complex, bis (myristyl-N)
-Hydroxyethyl imidazoline) chloroacetic acid complex, bis (palmityl-N-hydroxyethyl imidazoline)
Chloroacetic acid complex, bis (stearyl-N-hydroxyethylimidazoline) chloroacetic acid complex, bis (behenyl-
N-hydroxyethylimidazoline) chloroacetic acid complex,
And the like, and particularly preferred one is a bis (stearyl-N-hydroxyethylimidazoline) chloroacetic acid complex.

The hair treatment agent of the present invention contains at least one of these components (A) in an amount of 0.5 to 10% by weight (hereinafter abbreviated as wt%), preferably 1.0 to 5% by weight, based on the total amount. . Further, if the amount is less than 0.5 wt%, a good result on the hair finishing effect cannot be obtained, and if it exceeds 10 wt%, the hair becomes sticky, which is not preferable.

The polypeptide as the component (B) of the present invention is a known substance, which is a substance having both an amino group and a carboxyl group as represented by the following general formula, and does not essentially question the origin of its production. However, in practice, a normal collagen protein hydrolyzate is applied.

(However, R represents an alkyl group.) The average molecular weight of the polypeptide (measured by gel filtration) is
200 to 5000, preferably 400 to 3000
Is. If the average molecular weight is less than 200 or more than 5000, good pearly luster and hair finishing effect cannot be obtained.
The content of the polypeptide is 1.0 to 12 wt%, preferably 2.0 to 10 wt%. Also, the content is 1w
If it is less than t% or exceeds 12 wt%, good pearl luster cannot be obtained, and the storage stability described below is poor.

In addition, stearyl alcohol, which is the component (C), (D)
The content of the component behenyl alcohol is 0.1 to 10
wt%, preferably 0.5 to 6 wt%, and the weight ratio of stearyl alcohol to behenyl alcohol is 1:
1.5 to 1: 4.5 Particularly preferably, the range is 1: 2 to 1: 4.

When the content weight ratio of stearyl alcohol and behenyl alcohol is outside the above range, excellent pearl luster and storage stability cannot be obtained.

The pearly hair treatment agent of the present invention has the above-mentioned four components as essential constituent components, but other components can be added to the composition within a range that achieves the object of the present invention.

That is, hydrocarbons such as liquid paraffin, petrolatum and squalane, ester oils such as isopropyl myristate and isopropyl palmitate, camellia oil, olive oil, vegetable oils such as avocado oil, polyglycerin fatty acid esters,
Nonionic surfactants such as polyoxyethylene fatty acid ester, polyoxyethylene sorbitan monolaurate,
Examples include cellulose derivatives such as methyl cellulose, hydroxyethyl cellulose and cationized cellulose, moisturizers such as ethylene glycol, propylene glycol and glycerin, and other bactericidal agents, chelating agents, ultraviolet absorbers, coloring agents and fragrances. More than one species can be blended.

The reason why the hair treatment agent of the present invention is imparted with pearly luster is not clear, but it is because the amphoteric surfactant used in the present invention and a specific mixing ratio of stearyl alcohol and behenyl alcohol and a complex salt of a polypeptide are precipitated. It is speculated that there is.

(Examples) Next, the present invention will be described with reference to examples, but the present invention is not limited to these examples.

The test method used in this example is as follows.

(1) Pearl luster The sample was placed in a 100 ml transparent glass container and evaluated by the naked eye for the following criteria.

◯: A beautiful pearl luster is recognized.

Δ: A slight pearly luster is recognized.

X: No pearl luster is observed.

(2) Storage stability (b) High temperature stability Put the sample in a 100 ml transparent glass container, seal it, and
After storing it in a thermostatic chamber at 5 ° C for 1 month,
The evaluation was performed according to the following criteria.

◯: No phase separation, aggregation or disappearance of pearly luster is observed.

X: Phase separation, aggregation and disappearance of pearly luster are recognized.

(B) Low temperature stability Put the sample in a 100 ml transparent glass container, seal it, and
After being stored in a thermostatic chamber at a temperature of 1 ° C. for 1 month, the following criteria were evaluated by the naked eye.

◯: Phase separation and solidification are not observed.

X: Phase separation, solidification, etc. are recognized.

(3) Hair finishing effect Compared to commercially available hair rinse agents, "moist feeling of hair", "smoothness of hair", and "combability" in each example.
Sensory comparisons were carried out by 20 female panelists, and evaluation was performed according to the following criteria.

◎: When the number of people who answered good was 18 or more ○: When 〃 was 14 to 17 △: When 〃 was 8 to 13 ×: When 〃 was 7 or less Examples 1-2, Comparative Example 1 to 3 A hair rinse composition having the composition shown in Table 1 was prepared by a usual method, and the effect of each essential component was investigated. Table 1 shows the results.

Examples 3 to 4 and Comparative Examples 4 to 7 Hair treatment compositions having the composition shown in Table 2 were prepared by a usual method, and the effect of each essential component was investigated. Table 2 shows the results.

Examples 5 to 6 and Comparative Examples 8 to 10 Hair rinse compositions having the composition shown in Table 3 were prepared by a usual method, and the effect of each essential component was investigated, and Table 3 shows the results.

(Characteristics) As is clear from Examples 1 to 6, the hair treatment agents of the present invention all show excellent performance.

On the other hand, when the higher alcohol, which is an essential component, is cetyl alcohol, stearyl alcohol, and behenyl alcohol alone, or when two kinds of cetyl alcohol and stearyl alcohol or cetyl alcohol and behenyl alcohol are used in combination (Comparative Examples 1 to 5), stearyl is used. When the blending weight ratio of alcohol and behenyl alcohol is outside the range of the present invention (Comparative Examples 6 to 7), and when the blending amount of the polypeptide which is an essential component is outside the range of the present invention (Comparative Examples 8 to 10), etc. However, all of them show inferior performance, and the object of the present invention cannot be achieved.

(Effects of the Invention) As described above, it is apparent that the present invention provides a useful hair treatment agent which is excellent in pearly luster, storage stability and hair finishing effect.

Claims (1)

[Claims] 1. At least one of (A) bis (2-alkyl-N-hydroxyethylimidazoline) chloroacetic acid complex type amphoteric surfactant (provided that the alkyl group is a long chain having 11 to 21 carbon atoms) is from 0.5 to 10% by weight, (B) average molecular weight 2
1.0 to 12% by weight of the polypeptide of 0 to 5,000,
(C) Stearyl alcohol 0.1 to 10% by weight,
(D) A hair treatment agent comprising 0.15 to 15% by weight of behenyl alcohol, and the content weight ratio of stearyl alcohol to behenyl alcohol is 1: 1.5 to 1: 4.5.