JPH02212410A - Composition agent for conditioning alkali-treated hair - Google Patents

Abstract

PURPOSE:To provide the subject conditioning composition enabling to repair injured hair, inhibit the deterioration of the hair and impart good touch and luster to the hair by containing a pH-buffering solution, a protein hydrolyzate having a specific mol.wt., an amino acid-modified silicone, etc., as essential components. CONSTITUTION:A conditioning agent contains (A) 2-20wt.% (an amount required for maintaining the pH of the composition to 4-7) of a pH-buffering agent comprising both an organic and an alkali or an organic acid salt, (B) 0.1-20wt.% of one or more selected from protein hydrolyzates, polypeptides and polypeptide derivatives and having an average mol.wt. of 200-4000 and (C) 0.1-10wt.% of a compound of the formula (X is 10-500; Y is 1-30; n and m are 1-10), preferably dimethylsiloxane.gamma-(beta-aminoethyl)aminopropylsiloxane copolymer. The organic acid as the component A has preferably a pKa value of approximately 3-6 and a high buffering ability near the pH of 5.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to a conditioning composition for alkali-treated hair, and its purpose is to condition alkali-treated hair used after alkali treatments such as permanent waving and hair dye, in which the hair is prone to damage and deterioration. To provide a conditioning composition for alkali-treated hair capable of repairing damaged hair, inhibiting hair deterioration, and imparting good feel and gloss.

(Prior Art) In recent years, an increasing number of people are performing permanent waving, hair bleaching, and hair dyeing.

Hair that has been treated with alkali, such as hair dye, hair conditioner, or hair perm, is often damaged, and split ends and split ends are more likely to occur. There were no suitable conditioning compositions.

Conventionally, when washing hair with a hair detergent, shampooing was done with highly alkaline ingredients such as coconut oil potash soap, so hair rinses were shampooed with highly alkaline ingredients such as tartaric acid and fumaric acid. It was something.

Currently, most shampoos have surfactants as their main ingredients, and the conditioner that neutralizes them is different from conventional conditioners because it has been pointed out that the degreasing power of anionic shampoos has a strong degreasing effect and makes hair dry. , conditioning compositions mainly consisting of cationic surfactants and oils have become mainstream.

Therefore, using a shampoo rinse agent made of a cationic surfactant mainly containing quaternary ammonium salts as a conditioning composition for alkali-treated hair, it is important to return the alkali-treated hair to its isoelectric point pH. ,
It was not suitable as a treatment agent for repairing hair damage or suppressing hair deterioration and damage.

In addition, conventional acid rinsing removes hair that has become alkaline due to permanent waving or hair dye treatment by adjusting the pH of the isoelectric point.
It is very difficult to control.

The reason for this is that the isoelectric point ρ■ varies depending on the amount of acid rinse used.

However, returning the pH of alkali-treated hair to its isoelectric point is important in terms of suppressing hair deterioration and texture.

(Problem to be solved by the invention) After the hair has been subjected to alkali treatment such as after hair dye, hair bleach, or hair perm, the hair is returned to the pH of the isoelectric point,
There is currently no conditioning composition for alkali-treated hair that repairs hair damage or suppresses hair deterioration and damage, and there has been a desire to develop one.

(Solution Means) In light of the above-mentioned circumstances, the present invention provides a conditioning composition that makes the isoelectric point of hair that has become alkaline after hair dye, hair bleach, hair perm, etc.
In addition, this invention was completed with the aim of creating a conditioning composition that can strengthen hair strength. Specifically, this invention consists of a pH buffer consisting of an organic acid and an alkali or an organic acid salt, and a protein hydrolyzate, polypeptide, One or more selected from peptide derivatives with an average molecular weight of 2
00 to 4000, and amino-modified silicone (
By providing a conditioning composition for an alkaline treatment tank M comprising formula (1)) as an essential component, we have succeeded in eliminating all of the above-mentioned conventional drawbacks.

m: represents 1 to 10.

(Structure of the Invention) The organic acids constituting the pl+ buffer consisting of an organic acid and an alkali or an organic acid salt used in this invention include malonic acid, succinic acid, maleic acid, acetic acid, propionic acid,
One or more organic acids selected from butyric acid, crotonic acid, lactic acid, citric acid, tartaric acid, and malic acid can be preferably used.

The reason why the above organic acids are used as the organic acids constituting the pHl1U buffer in this invention is that the pKa value of these organic acids is 3 to 6.
It was selected because it is located nearby and has a high buffering capacity at around pH 5, and its function is mainly used to return hair that is tilted towards the alkaline side to its isoelectric point, and is a conditioning composition. The pH value of the hair is maintained in the range of 4 to 7, preferably 5, and the formulation is such that the hair treated with the treatment agent returns to a pH value of about 4 to 7, preferably 5.

The alkaline agents constituting the pH buffer used in this invention are used to stabilize the pH value of such organic acids, and include sodium hydroxide, potassium hydroxide, aqueous ammonia, monoethanolamine, jetanolamine, triethanolamine, aminomethylpropanediol, inpropanediol, inpropanediol, diisopropaturamine, triisopropaturamine,
One or more alkaline agents selected from L-arginine, L-lysine, and L-histidine may be used.

The organic acid salt constituting the pH buffer used in this invention may be an organic acid salt obtained by neutralizing the above-mentioned organic acid and the above-mentioned alkali agent.

The component used in this invention, which is one or more selected from protein hydrolysates, polypeptides, and polypeptide derivatives, and has an average molecular weight of 200 to 4000,
When hair that has been treated with alkali is returned to its isoelectric point with this conditioning composition, it is attached to and absorbed by the hair, replenishing the proteins that have been damaged and washed out due to the chemical treatment, and also having the effect of protecting the surface of the hair.

The component used in this invention, which is one or more selected from protein hydrolysates, polypeptides, and polypeptide derivatives and has an average molecular weight of 200 to 4,000, is a hydrolyzate of proteins such as keratin, collagen, and silk. In some cases, it refers to polypeptides purified from hydrolysates of these proteins, or derivatives of these purified polypeptides.

Protein hydrolysates, polypeptides, and polypeptide derivatives Protein hydrolysates are keratin, collagen hydrolysates, or pure polypeptides that do not contain anything other than amino acids, and their polypeptide derivatives have a molecular weight of 4,000 or less. Those having a molecular weight of about 200 to 1000 can be preferably used.

The reason for this is that the smaller the molecular weight, the easier it is to be absorbed into the hair, but if the molecular weight is less than 200, the absorbed material will easily flow out, and if the molecular weight is 4000 or more, it will give a stiff feel. It is from.

The amino-modified silicon used in this invention has the chemical formula (1
) Amino-modified silicone resin is a polymer of silicone modified with an amino acid and has a molecular weight of 5,000 to 10,0000.

The amino-branched portion of this amino-modified silicone has an affinity for hair and is easily adsorbed to the hair, while the silicone resin portion forms a film on the hair surface to protect the hair.
(Left below) NH (CH2) m
N1)2 However, X: 10-500, Y: 1-3
0, n: 1-101 cm: 1-10.

In this invention, the amino-modified silicone has an amino group, and the protein hydrolyzate is entirely silicone to form a film on the hair surface, and this film protects the hair from damage such as split ends and hangnails.

Preferred examples of the amino-modified silicone used in this invention include dimethylsiloxane/γ-(β-aminoethyl)aminopropylsiloxane copolymer, which is usually emulsified.

Such amino-modified silicone may be blended in an amount of 5 to 50 (2% by weight) of the p II ft-relaxing agent, and 2 to 20 (weight %) of the total buffering agent may be blended.

In this invention, the protein hydrolyzate has a total of 0.
1 to 20 (wt%), preferably 1 to 20 (wt%), and the amino-modified silicone may be blended in an amount of 0.1 to 10 (wt%), preferably 0.5 to 1.0 (wt%), based on the total amount.

In this invention, fragrances, preservatives, amines, thickeners, etc. may be added to the extent that the object of the invention is not impaired.

Examples and comparative examples of the present invention will be shown below to further clarify the effects of the present invention.

Examples 1 to 5 and Comparative Examples 1 to 6 Example (Table 1-1) (Hereafter, blank space) Comparative Example (Table 1-2) Note) As a buffering agent, P containing ammonia and citric acid was used.
Use H5.0.

As a protein hydrolyzate, Bromoisu K manufactured by Seiwa Kasei is a hydrolyzed keratin (average molecular weight 400) liquid.
Used by converting it into a pure part.

As the amino-modified silicone, its emulsion solution, Amodimethicone Emulsion (3M8702C) manufactured by Toray Silicon ■, was used in terms of purity.

Test example 1 Women who get a perm at least once every three months (18-4
Immediately after a perm treatment was performed at a beauty salon, the hair of a 5-year-old child was treated with the above composition, and the results were questioned.

Incidentally, the conditioning composition for alkali-treated hair of the comparative example and the conditioning composition for alkali-treated hair of the example were tested without specifying anything in particular.

The results were evaluated in three ways: O: better than usual, △: the same as usual, ×: worse than usual. The test was conducted on the following items.

B: Hair gloss, ■: Hair feel results such as hair suppleness and stiffness are summarized in Table 2.

(Hereinafter in the margin) Example (Table 2-1) (person) (hereinafter in the margin) Comparative example (Table 2-2) (person) Test Example 2 Conditioning composition for alkali-treated hair obtained in Example 1 above The following hair strength test was conducted using:

A 10cm long Ig hair bundle was soaked in 3% hydrogen peroxide water (pH
10,0) for 10 minutes for bleaching, then washing with 40°C warm water and drying.

(A) A test in which this process was simply repeated five times in succession,
(B) After this treatment, the hair was treated with the alkali-treated hair conditioning composition obtained in Example 1, and this combination treatment was repeated five times.

The hair after each treatment and the hair before treatment are randomly extracted from the hair bundles and subjected to a rheometer.
We looked at the weight required to cut hair of length ■. The results were the average value of 10 samples.

Table 3 shows the results.

(The following is a blank space) Table (g) As is clear from the above results, it can be seen that the conditioning composition for alkali-treated hair according to the present invention has excellent effects.

Claims (4)

[Claims] (1) A pH buffer consisting of an organic acid and an alkali or an organic acid salt; a component selected from protein hydrolysates, polypeptides, and polypeptide derivatives with an average molecular weight of 200 to 4000; A conditioning composition for alkali-treated hair containing modified silicone (formula (1)) as an essential ingredient. ▲There are mathematical formulas, chemical formulas, tables, etc.▼(1) However, X: 10-500, Y: 1-30, n: 1-10
, m: 1 to 10. (2) The conditioning composition for alkali-treated hair according to claim (1), which contains 2 to 20% by weight of a pH buffer consisting of an organic acid and an alkali or an organic acid salt. (3) Claim (1) containing 0.1 to 20% by weight of one or more components selected from protein hydrolysates, polypeptides, and polypeptide derivatives and having an average molecular weight of 200 to 4,000. Conditioning composition for alkali-treated hair as described in 1. (4) The conditioning composition for alkali-treated hair according to claim (1), which contains 0.1 to 10% by weight of amino-modified silicone.