JPS59110609A - Hair cosmetic - Google Patents

Abstract

PURPOSE:To prepare a cosmetic capable of imparting glossiness and smoothness to the hair in the form of either rinsing-type or non-rinsing type, by using a mono [N-(long chain acyl)] basic amino acid lower alkyl ester salt and a hydrophobic silicone as active components. CONSTITUTION:A mono [N-(long chain acyl)] basic amino acid lower alkyl ester salt and a hydrophobic silicone are used as essential components. The lower alkyl ester salt of the mono [N-(long chain acyl)] basic amino acid can be synthesized easily from a basic amino acid such as ornithine, lysine, arginine, etc. The lower alkyl ester component is preferably methyl ester, etc., and the amount of the mono [N-(long chain acryl)] basic amino acid lower alkyl ester salt in the cosmetic is 0.1-10wt%, preferably 0.2-5wt%. The amount of the hydrophobic silicone is usually 0.05-10wt%, preferably 0.1-5wt%.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hair cosmetic that has excellent effects in imparting luster and smoothness to hair.

Hair is normally covered with animal and vegetable oils such as hair creams and hair oils, as well as sebum secreted from the hair itself, but when hair is washed with soap or synthetic detergents, these oils and fats are removed more than necessary. It will be done. As a result, the hair after washing loses its smoothness and becomes dull and hard to the touch, making it difficult to comb and causing frizz and split ends. Various hair cosmetics have been developed and used as hair treatment agents.

These hair cosmetics contain quaternary ammonium salts such as dialkyl dimethel ammonium chloride and alkyl trimethyl ammonium chloride as the main active ingredient. There are two types of ammonium salts: those that are water-soluble and those that are easily water-soluble.Therefore, hair cosmetics are divided into ``rinsing type'' and ``non-rinsing type''. There are different ways to use each type.

In order to prevent hair from squeaking and tangling after washing and to improve the finish when dry, an appropriate amount of the above ammonium salt must be adsorbed to the hair. However, conventional hair cosmetics have problems with the release and adsorption properties of the ammonium salt, no matter how they are used, and have not been satisfactory. In particular, the shine and smoothness of the hair were still insufficient.

In addition, various fiber treatment agents such as fiber softeners have been known, but fibers, especially animal fibers, have a chemical structure similar to that of hair, but their physical structure is completely different from hair. Therefore, it is difficult to apply such fiber treatment agents to hair.

In addition, with the recent trend towards natural products, there is a growing trend for products with higher safety.

The present invention has been made under the above circumstances, and provides a hair cosmetic that can impart excellent luster and smoothness to all hair types, whether it is a rinse-off type, a combing type, or a no-rinse type. The purpose is to provide.

This object is achieved by providing a hair cosmetic containing a mono-N-long chain acyl basic amino acid lower alkyl ester salt and a hydrophobic silicone.

Hereinafter, the hair cosmetic of the present invention will be explained in more 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
It can be easily produced using basic amino acids such as ornithine, lysine, and arginine as raw materials, for example, by the method described in Japanese Patent Publication No. 42-11926 or Japanese Patent Publication No. 43-9529.

As the basic amino acid component of 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, γ-diaminobutyric acid are also used. These may be either optically active or racemic.

The acyl group of the mono N-long chain acyl basic amino acid lower alkyl ester salt is a saturated or unsaturated natural or synthetic fatty acid residue having 8 to 22 carbon atoms, such as lauroyl group, myristoyl group, valmitoyl group, stearoyl group. In addition to single fatty acid residues such as, natural mixed fatty acid residues such as coconut oil fatty acid residues and beef tallow fatty acid residues may be used.

As the lower alkyl ester component, methyl ester,
Ethyl ester, propyl ester, butyl ester,
Pentyl esters, hexyl esters, heptyl esters, octyl esters are suitable.

Salts of mono-N-long chain acyl basic amino acid esters include, for example, inorganic acid salts such as hydrochloride and sulfate, or, for example, acetate, tartrate, citrate, P-toluenesulfonate, Organic acid salts such as fatty acid salts, acidic amino acid salts, L or DL-pyrrolidone carboxylic acid salts are used. Among these, acidic amino acid salts, hydrochlorides, and L- or DL-pyrrolidone carboxylates are preferred.The amount of the mono-N-long chain acyl basic amino acid lower alkyl ester salt in hair cosmetics ranges from 0.1 to 0.1. 10% by weight, preferably 0.2-5% by weight.

Hydrophobic silicone, which is the second essential component of the present invention, is
The solubility in water at 25°C is less than 1% by weight, preferably less than 0.5% by weight, and the viscosity at 25°C is in the range of 1 to 1000 centistokes, preferably 5 to 500 centistokes.

The hydrophobic silicone includes all methylpolysiloxanes, methylphenylpolysiloxanes, fatty acid-modified polysiloxanes, aliphatic alcohol-modified polysiloxanes, polyoxyalkylene-modified polysiloxanes, and the like. Specific properties of this hydrophobic silicone are shown below.

0 Methylpolysiloxane is represented by the following general formula and has a viscosity of 0 to 1000 centistokes (25°C).

(CH3)3SiO((CH3)2SiO]n5i(C
H3)3 n-3 to 3500 The methylphenylpolysiloxane is represented by the following general formula and has 10 to 1
It has a viscosity of 0.007 inch stokes (25°C).

a 10 b + c, = i ~ 250 The fatty acid-modified polysiloxane is represented by the general formula below and has a viscosity of 10 to 1000 centistokes (25°C). is expressed by the general formula below, and is 10 to 1000 centistokes (2
It has a viscosity of 5°C).

The polyoxyalkylene-modified polysiloxane is represented by the following general formula and has a viscosity of 10 to 1000 centistokes (25°C).

Country 20 〇This hydrophobic silicone has a surface tension that is extremely close to or lower than the critical surface tension of hair, so it spreads evenly over the hair surface, creating a finish that is not sticky or heavy, but also smooth and glossy. Finishing effect-ffi'e
Show noticeably.

On the other hand, hydrophilic silicones have strong water retention properties, and are not used in the present invention because they become heavy and sticky during air-drying containing a lot of moisture or in humid climates.

The amount of silicone blended in the hair cosmetic of the present invention is usually 0.05 to 10%, preferably 0.01 to 5%.
This is related to N quantity.

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 ingredients include liquid paraffin, petrolatum,
Hydrocarbons such as solid paraffins, squalane and olefin oligomers; esters such as inglobil myristate, isoprobil balmite, stearyl stearate, octyldodecyl myristate, octyldodecyl oleate and 2-ethylhexanoic acid triglyceride;
Emulsifiers such as polyoxyethylene cetyl ether, polyoxyethylene stearate, and polyoxyethylene lupitan monolaurate; benzalkonium chloride, cetertrimethelammonicum chloride, cetostearyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyl chloride )! j) 'IF-
Cationic surfactants such as ammonium, distearyldimethylammonium chloride; N-(2-hydroxyethyl)-N-[bis(2-carboxyethyl)aminoethylcolaurylamide disodium salt, 2-cocoyl-
Amphoteric surfactants such as N-hydroxymethyl-N-hydroxyethylimidazolium betaine; anionic surfactants such as higher alcohol sulfates, alcohol ethersalunate, α-onfinsulfonate; lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, etc. (rqKR alcohol; higher fatty acids such as valmitic acid, stearic acid, and behenic acid; moisturizing agents such as etreme glycol, propylene glycol, 1,3-butylene glycol, chrycerin, and sorbitol; and other solvents, preservatives, fragrances, etc. It is a minor component of

The hair cosmetic composition of the present invention can be used in various applications such as hair rinse agents, hair conditioners, and hair lotions.

Next, Examples and Comparative Examples of the present invention will be shown to explain the effects of the present invention more specifically. In addition, prior to each side's explanation,
The test method will be explained.

Smoothness Apply a sample of 0.5 S”k directly to a shampoo-treated hair bundle (517', 20 cm) and spread it evenly by hand.
Dry in an atmosphere of 25°C and 65% RH, - day and night J
? 20 panelists about the "smoothness" of i's hair
The 0 evaluation standard for sensory evaluation is based on the evaluation obtained with a sample consisting of 1.0% by weight of stearyl trimether ammonium chloride, 3% by weight of cetyl alcohol, 103[i%] of propylene glycol, and water (the balance). This is a five-point evaluation.

◎: Good ○: Slightly good △: Equal ×: Slightly inferior xx: Inferior luster Sample 0.5 i+' was applied directly to shampoo-treated hair strands (5 fl, 20 cm), and after spreading it evenly by hand, The hair strands were dried in an atmosphere of 25° C. and 65% RH, and 20 panelists visually evaluated the gloss of the hair bundles after leaving them for day and night.

The evaluation criteria for gloss was 5, which was obtained from a sample consisting of 1.0% by weight of stearyltrimethylammonium chloride, 3% by weight of cetyl alcohol, loM% of propylene glycol, and water (the balance). Graded evaluation: 〇◎: Good 〇2 Slightly good △: Equal ×: Slightly inferior xx: Inferior Test Example 1 Hair rinses having the composition shown in Table 1 were prepared, and their smoothness and gloss imparting performance to hair were evaluated. was evaluated. The results are shown in the same table. In addition, the numbers in the table are weight %.

Table 1 (1) As is clear from Table 1, the hair rinse agent containing the two essential ingredients of the present invention has excellent properties of imparting smoothness and shine to hair.

Comparative Examples 1 and 2 cannot achieve the object of the present invention because they do not contain one of the essential components of the present invention.

Example 2 A hair treatment composition having the composition shown in Table 2 was prepared and its performance was evaluated.

Table 2 ≠ 2 The above hair treatment agent showed excellent gloss and smoothing effect on hair. Example 3 A hair lotion composition having the composition shown in Table 3 was prepared and its performance was evaluated. 3 Table 3 The above hair lotion composition exhibited excellent shine and smoothness imparting effects on hair.

Example 4 A hair brushing agent paste composition having the composition shown in Table 4 was prepared and its performance was evaluated.

Table 4 The above hair brushing agent showed the same excellent performance as Example 3.

Claims (1)

[Claims] Hair cosmetic 0 characterized by containing a mono-N-long chain acyl basic amino acid lower alkyl ester salt and a hydrophobic silicone