JPS628084B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a hair cosmetic that has an excellent effect on imparting flexibility to hair. Normally, hair is 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. Put it away. As a result, the hair after washing loses its smoothness, feels dry and stiff, and becomes difficult to comb, making it more likely to cause split ends and split ends. In order to eliminate such inconveniences, various hair cosmetics have been developed and used as hair treatment agents after hair washing. These hair cosmetics contain quaternary compounds such as dialkyldimethylammonium chloride and alkyltrimethylammonium chloride.
The main active ingredient is grade ammonium salt. There are two types of ammonium salts: those that are poorly soluble in water and those that are easily soluble in water.Therefore, correspondingly, there are two types of hair cosmetics: ``rinse type'' and ``non-rinse type.'' However, each type of use is different. In order to prevent hair from squeaking and tangling after washing, etc., and to improve the finish when dry, 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, regardless of the form of use, and are not fully satisfactory. In particular, the flexibility of the hair was 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 hair, but a physical structure that is completely different from hair. Therefore, it is difficult to apply such fiber sulfurizing agents to hair. The present invention was made under the above circumstances, and it is an object of the present invention to provide a hair cosmetic that exhibits excellent hair flexibility when applied to both rinsing and non-rinsing types. shall be. That is, the hair cosmetic of the present invention contains 0.1 to 3% by weight of a quaternary ammonium salt represented by the following general formula () and 0.1 to 3% by weight of a quaternary ammonium salt represented by the following general formula (). It is characterized by being contained as an essential component and having a weight ratio of ()/() of 1/2.5 to 1/1.5. General formula (): (In the formula, R ₁ is an alkyl group having 16 to 18 carbon atoms,
R ₂ , R ₃ and R ₄ represent an alkyl group or hydroxyalkyl group having 1 to 3 carbon atoms, and X represents a halogen atom or an alkyl sulfate group having 1 or 2 carbon atoms in the alkyl group. ) General formula (): (In the formula, R ₅ is an alkyl group having 20 to 22 carbon atoms,
R ₆ , R ₇ and R ₈ represent an alkyl group or hydroxyalkyl group having 1 to 3 carbon atoms, and X represents a halogen atom or an alkyl sulfate group having 1 or 2 carbon atoms in the alkyl group. ) Hereinafter, the hair cosmetic of the present invention will be explained in more detail. The first essential component of the hair cosmetic of the present invention is a mono C _16-18 alkyl quaternary ammonium salt represented by the following general formula (). General formula (): (In the formula, R ₁ is an alkyl group having 16 to 18 carbon atoms,
R ₂ , R ₃ and R ₄ represent an alkyl group or hydroxyalkyl group having 1 to 3 carbon atoms, and X represents a halogen atom or an alkyl sulfate group having 1 or 2 carbon atoms in the alkyl group. ) The blending amount of the first essential ingredient is 0.1 to 3.0% by weight, preferably 0.1 to 3.0% by weight based on the entire hair cosmetic.
It is 2.0% by weight. If it is less than 0.1% by weight, the effect of the present invention will not be exhibited, and if it exceeds 3.0% by weight, the hair will become sticky and heavy, which is not preferable. The following substances are representative examples of the first essential component. palmityltrimethylammonium chloride,
Stearyltrimethylammonium chloride, hydrogenated tallow alkyltrimethylammonium chloride, hydrogenated tallow alkyltrimethylammonium bromide, hydrogenated tallow alkyltrimethylammonium methyl sulfate. The second essential component of the hair cosmetic of the present invention is a mono-C _20-22 alkyl quaternary ammonium salt represented by the following general formula (). General formula (): (In the formula, R ₅ is an alkyl group having 20 to 22 carbon atoms,
R ₆ , R ₇ and R ₈ represent an alkyl group or hydroxyalkyl group having 1 to 3 carbon atoms, and X represents a halogen atom or an alkyl sulfate group having 1 or 2 carbon atoms in the alkyl group. ) The amount of the second essential ingredient is 0.1 to 3.0% by weight, preferably 0.1 to 3.0% by weight based on the entire hair cosmetic.
It is 2.0% by weight. If it is less than 0.1% by weight, the effect of the present invention will not be exhibited, and if it exceeds 3.0% by weight, the hair will become sticky and heavy, which is not preferable. Representative examples of the second essential component include the following substances. eicosyltrimethylammonium chloride,
Heneicosyltrimethylammonium chloride, docosyltrimethylammonium chloride,
docosyltrimethylammonium bromide, docosyltrimethylammonium chloride, docosyltrimethylammonium methyl sulfate. In the hair cosmetic of the present invention, the weight ratio ()/() of the quaternary ammonium salt of the above general formula () to the quaternary ammonium salt of the general formula () is
must be in the range of 1/2.5 to 1/1.5. Particularly preferably, ()/()=1/2.2 to 1/1.75. ()/() is less than 1/2.5 or 1/
If it exceeds 1.5, the flexibility of the hair cannot be obtained, which is not preferable. The hair cosmetic of the present invention contains other optional ingredients,
It is possible to mix them within a range that does not affect the effects of the present invention. Such optional ingredients include the following substances. liquid paraffin, vaseline, 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; cetanol, stearyl alcohol, behenyl alcohol and hexyldecanol, etc. higher alcohols; emulsifiers such as glyceryl monostearate, sorbitan monopalmylate, polyoxyethylene cetyl ether, polyoxyethylene stearate and polyoxyethylene sorbitan monolaurate; methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose and cationized cellulose thickeners such as natural polymers; humectants such as ethylene glycol, propylene glycol, 1,3 butylene glycol, glycerin and sorbitol; and other small amounts of components such as solvents, disinfectants, and fragrances. The hair cosmetic composition of the present invention can be used in various applications such as a hair rinse, a spray-type or dispenser-type hair conditioner, and a hair lotion. 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, a hair flexibility test method will be explained. Hair flexibility Apply 0.5g of the sample directly to a shampoo-treated hair bundle (5g, 20cm) and spread it evenly by hand.
The hair was dried in an atmosphere of 25°C and 65% RH, and after being left overnight, the softness of the hair was evaluated by a panel of 20 people. The evaluation criteria for flexibility is a 5-level evaluation based on the evaluation obtained with a sample consisting of 1.0% by weight stearyltrimethylammonium chloride, 3% by weight cetyl alcohol, 10% by weight propylene glycol, and water (balance). . ◎: Good 〇: Slightly good △: Equal ×: Slightly inferior ××: Inferior Test example 1 Nine hair cosmetics containing various quaternary ammonium salts were prepared and tested for their softening effects on hair. . The results are shown in Table 1 below. In addition, the blending amount is weight % (the same applies to other test examples).

【table】

[Table] As is clear from Table 1, quaternary ammonium salts other than the combination of mono-C _16-18 alkyl quaternary ammonium salt and mono-C _20-22 alkyl quaternary ammonium salt (Example 1) It can be seen that the cosmetics containing salt (Comparative Examples 1-8) do not have excellent softening effects. Test Example 2 Nine types of hair cosmetics with various weight ratios of mono-C _16-18 alkyl quaternary ammonium salt and mono-C _20-22 alkyl quaternary ammonium salt were prepared, and their softness on hair was evaluated. tested for sexual effects. The results are shown in Table 2 below.

[Table] As is clear from Table 2, the weight ratio of mono-C _16-18 alkyl quaternary ammonium salt to mono-C _20-22 alkyl quaternary ammonium salt is 1/2.5 to 1/2.5.
It can be seen that when the ratio is 1/1.5, both exhibit excellent flexibility effects on hair. Test Example 3 A hair rinse composition having the formulation shown in Table 3 below was manufactured, and its softening effect on hair was evaluated. Performance evaluation is after immersing a hair bundle (8.5 g, 20 cm) in 200 ml of a 2% diluted hair rinse composition at 40°C for 5 seconds, rinsing twice with 200 ml of warm water at 40°C for 30 seconds each, and drying. I followed him.

[Table] As is clear from Table 3, the hair rinse composition of the present invention has a better hair softening effect than the conventional composition. Test Example 4 A hair cream composition having the formulation shown in Table 4 below was manufactured, and its hair softening effect was evaluated.

【table】

[Table] The hair cream composition of the present invention had an excellent hair softening effect not found in conventional hair creams.

Claims (1)

[Scope of Claims] 1 0.1 to 3% by weight of a quaternary ammonium salt represented by the following general formula () and 0.1 to 3% by weight of a quaternary ammonium salt represented by the following general formula () as essential components. 1. A hair cosmetic containing the following: and having a weight ratio of ( )/( ) of 1/2.5 to 1/1.5. General formula (): (In the formula, R ₁ is an alkyl group having 16 to 18 carbon atoms,
R ₂ , R ₃ and R ₄ represent an alkyl group or hydroxyalkyl group having 1 to 3 carbon atoms, and X represents a halogen atom or an alkyl sulfate group having 1 or 2 carbon atoms in the alkyl group. ) General formula (): (In the formula, R ₅ is an alkyl group having 20 to 22 carbon atoms,
R ₆ , R ₇ and R ₈ represent an alkyl group or hydroxyalkyl group having 1 to 3 carbon atoms, and X represents a halogen atom or an alkyl sulfate group having 1 or 2 carbon atoms in the alkyl group. )