JPS635004B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to hair cosmetics, and in particular, hair cosmetics that moisturize and soothe hair, add luster to hair, are non-sticky, make hair easier to comb, and at the same time improve brushability of hair. Regarding. In recent years, due to the spread of brushing, perming, hair coloring, etc., hair is placed in an environment where it is extremely susceptible to damage. Consumers often complain that their hair is dry and unsmooth, lacks shine, and has poor brushability. Therefore, there is a desire for hair cosmetics that moisturize and soothe hair and improve shine and brushability. In addition, since hair comes into direct contact with the skin of the nape of the neck and is always touched by hands when caring for it, a sticky and heavy feel is completely disliked. Therefore, a stable emulsion system without stickiness is also a desirable condition for hair cosmetics. Among the hair cosmetics on the market, many claim to solve consumers' hair-related concerns and keep hair beautiful and healthy, but in reality, very few hair cosmetics fully meet the above conditions. I can't find it. That is,
Conventional hair cosmetics contain a large amount of oil, resulting in a heavy, sticky finish. On the other hand, attempts have been made to achieve a light and silky finish by reducing the amount of oil in hair cosmetics, but no matter how much oil is reduced, the stickiness is slightly reduced. There is no significant effect just by applying it, and the shine and brushability are significantly reduced. Additionally, attempts have been made to use oils with low surface tension, viscosity, and melting point; for example, patents are known in which methylpolysiloxane is mixed and dissolved in diol derivatives or branched aliphatic alcohols. This method allows the active ingredients of hair cosmetics to adhere uniformly to the surface of the hair, reduces friction between the hairs and between the hair and the brush or comb, and protects the hair from mechanical irritation. This is the main focus. However, such non-sticky oils with low surface tension are extremely hydrophobic, making the hair frizzy (not moist and calm).
Moreover, it has the disadvantage of being inferior in cleaning ability (shamp-cleanability). An object of the present invention is to provide a hair cosmetic that makes hair moist and calm, improves brushability, reduces stickiness, and makes hair easier to comb. That is, the hair cosmetic of the present invention comprises a mono-N-long chain acyl basic amino acid lower alkyl ester salt,
It is characterized by containing a fatty acid polypeptide condensate. Hereinafter, the hair cosmetic of the present invention will be explained in detail. The lower alkyl ester salt of a mono-N-long-chain acyl basic amino acid, which is the first essential component of the hair cosmetic of the present invention, is prepared using basic amino acids such as ornithine, lysine, and arginine as raw materials, for example, by
It can be easily produced by the method described in No. 42-11926 or Japanese Patent Publication No. 43-9529. As the basic amino acid component in the mono-N-long chain acyl basic amino acid lower alkyl ester salt, in addition to natural amino acids such as ornithine, lysine, and arginine, synthetic amino acids such as α,β-diaminobutyric acid can be used as well. These may be either optically active forms or racemic forms. The acyl group is a saturated or unsaturated natural or synthetic fatty acid residue having 8 to 22 carbon atoms, such as single fatty acid residues such as lauroyl group, myristoyl group, palmitoyl group, and stearoyl group, as well as coconut oil fatty acid residues. It may be a natural mixed fatty acid residue such as a fatty acid residue or a beef tallow fatty acid residue. Suitable lower alkyl ester components include methyl ester, ethyl ester, propyl ester, butyl ester, pentyl ester, hexyl ester, heptyl ester, and octyl ester. Salts of mono-N-long chain acyl basic amino acid esters include inorganic acid salts such as hydrochloride, sulfate, acetate, tartrate, citrate, p-toluenesulfonate, fatty acid salt, etc. Salts, acidic amino acid salts, organic acid salts such as L- or DL-pyrrolidone carboxylic acid salts are used, and among these, hydrochloride salts, L- or DL-pyrrolidone carboxylic acid salts are particularly preferred. The blending amount of the mono-N-long chain acyl basic amino acid lower alkyl ester salt explained above is 0.1 to 10
% by weight, preferably 0.2-5% by weight. The fatty acid polypeptide condensate, which is the second essential component of the hair cosmetic of the present invention, is a condensate of a fatty acid having 8 to 20 carbon atoms and a protein decomposition product (polypeptide) having a molecular weight of 200 to 2000, for example. , the terminal carboxylic acid group is in the form of an acid or a lithium salt, sodium salt, potassium salt, or alcohol amine salt. This fatty acid polypeptide condensate adsorbs to the surface of hair that has been damaged by brushing, perming, hair coloring, etc., and has the effect of repairing hair damage. When the number of carbon atoms in the fatty acid is 7 or less, the amount of fatty acid adsorbed to the hair is small, and even if it is adsorbed, the effect of making the hair glossy is weak. Furthermore, if the number of carbon atoms in the fatty acid exceeds 20, the effect of suppressing dry hair will be poor. On the other hand, if the molecular weight of the polypeptide is less than 200, the effect of restoring damaged hair will be weak, and if it exceeds 2000, the hair will become stiff, which is not preferable. In addition to the above-mentioned essential ingredients, the cosmetic of the present invention may contain the following optional ingredients within a range that does not affect the effects of the present invention. That is, optional components include hydrocarbons such as liquid paraffin, vaseline, solid paraffin, squalane and olefin oligomer; isopropyl myristate, isopropyl palmitate, stearyl stearate, octyldodecyl myristate, octyldodecyl oleate, and 2-ethylhexane. Esters such as acid triglycerides; Emulsifiers such as polyoxyethylene cetyl ether, polyoxyethylene stearate, and polyoxyethylene sorbitan monolaurate; benzalkonium chloride, cetyltrimethylammonium chloride, cetostearyltrimethylammonium chloride, stearyltrimethylammonium chloride , behenyltrimethylammonium chloride,
Cationic surfactants such as distearyldimethylammonium chloride; N-(2-hydroxyethyl)
-N-[bis(2-carboxyethyl)aminoethyl]laurylamide disodium salt, amphoteric surfactants such as 2-cocoyl-N-carboxymethyl-N-hydroxyethylimidazolium betaine; higher alcohol sulfates, alcohol ethers Anionic surfactants such as sulfate, α-olefin sulfonate; lauryl alcohol, cetyl alcohol, stearyl alcohol,
Higher alcohols such as behenyl alcohol; higher fatty acids such as palmitic acid, stearic acid, behenic acid; humectants such as ethylene glycol, propylene glycol, 1,3-butylene glycol, glycerin and sorbitol; and other solvents, preservatives, fragrances, etc. It is a minor component. The hair cosmetic composition of the present invention can be used in various applications such as hair rinses, hair conditioners, hair lotions, and the like. Next, Examples and Comparative Examples of the present invention will be shown to explain the effects of the present invention more specifically. Before explaining each example, the test method will be explained. Performance After applying or spraying the hair cosmetics on the hair at a ratio of 0.5 g to 10 g of hair, the moisturizing feeling, manageability, shine, brushability, and dryness of the hair are evaluated as follows. The evaluation criteria were 1% by weight stearyltrimethylammonium chloride, 3% by weight cetyl alcohol, 10% by weight propylene glycol, and 86% by weight.
This is a 5-level evaluation based on the performance of a typical, well-known general-purpose rinse composition consisting of % by weight of water. ◎: Good 〇: Slightly good △: Equal ×: Slightly inferior XX: Inferior In each experimental example, the blending amount is shown in weight%. Test Example 1 Hair rinse compositions shown in Table 1 below were prepared and their performance was evaluated.

[Table] As is clear from Table 1, Comparative Examples 1 to 4 are
Since it contains only one of the two essential components of the present invention, the object of the present invention cannot be achieved. Test Example 2 Hair treatment compositions shown in Table 2 below were prepared and their performance was evaluated.

[Table] The above hair treatment showed excellent performance. Test Example 3 Hair lotion compositions shown in Table 3 below were prepared and their performance was evaluated.

【table】

[Table] The hair lotion in Table 3 showed excellent performance. Test Example 4 Hair brushing agent compositions shown in Table 4 below were prepared and their performance was evaluated.

[Table] The above hair brushing agent showed excellent performance.

Claims (1)

[Claims] 1. A hair cosmetic comprising a mono-N-long chain acyl basic amino acid lower alkyl ester salt and a fatty acid polypeptide condensate.