JPS628089B2 - - Google Patents

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to hair cosmetics that impart smoothness and moisturized feel 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 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 that of hair. Therefore, it is difficult to apply such fiber treatment agents to hair. The present invention has been made under the above circumstances, and the present invention provides hair cosmetics that exhibit excellent "smoothness" and "moisture feeling" when applied to both rinsing and non-rinsing types. The purpose is to provide fees. 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 and R ₆ are alkyl groups with 20 to 22 carbon atoms, R ₇ and R ₈ are alkyl groups with 1 to 3 carbon atoms or hydroxyalkyl groups, and X is a halogen atom or an alkyl group with 1 carbon number. or 2.) 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, 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 diC _20-22 alkyl quaternary ammonium salt represented by the following general formula (). General formula () (In the formula, R ₅ and R ₆ are alkyl groups with 20 to 22 carbon atoms, R ₇ and R ₈ are alkyl groups with 1 to 3 carbon atoms or hydroxyalkyl groups, and X is a halogen atom or an alkyl group with 1 carbon number. (or 2 alkyl sulfate group)) The amount of the second essential component is 0.1 to 3.0% by weight, preferably 0.1 to 3.0% by weight, based on the total 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, which is not preferable. Representative examples of the second essential component include the following substances. Diecosyl dimethylammonium chloride, diheneicosyl dimethylammonium chloride, didocosyl dimethylammonium chloride, didocosyl dimethylammonium bromide, didocosyl diethylammonium chloride, didocosyl dimethylammonium methylsulfate, docosyl eicosyl dimethylammonium chloride. These can be obtained using rapeseed oil as a raw material by known production methods. Specifically, fatty acids produced using rapeseed oil as a raw material are distilled and purified, then reacted with ammonia under a dehydration catalyst to synthesize nitrile, and this nitrile is reduced under a hydrogenation catalyst to form dialkyl secondary It is obtained by producing an amine, adding methyl chloride caustic soda solution, and quaternizing it. 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 1/1.7.
If ()/() exceeds 1/1.5, the "moisture feeling" of the hair will deteriorate, which is not preferable. If it is less than 1/2.5, both "smoothness" and "moist feeling" deteriorate, 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; ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose and cationized cellulose cellulose derivatives such as; thickeners such as natural polymers; humectants such as ethylene glycol, propylene glycol, 1,3-butylene glycol, glycerin and sorbitol; and other minor 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, various test methods employed in each example will be explained. “Smoothness” and “Moisture Feeling” Apply 0.5g of the sample directly to a shampooed hair bundle (5g, 20cm) and spread it evenly by hand.
After drying in an atmosphere of 25℃ and 65% RH and leaving it for a day and night, the hair strands will feel smooth and moist.
sensory evaluation by 20 panelists. The evaluation standard for combability (sensory evaluation) is 1.0% by weight.
stearyltrimethylammonium chloride,
This is a 5-level evaluation based on the evaluation obtained with a sample (Comparative Example 1) consisting of 3% by weight cetyl alcohol, 10% by weight propylene glycol, and water (remainder). ◎Good 〇: Slightly good △: Equal ×: Slightly inferior ××: Inferior Test Example 1 Eight types of hair cosmetics containing various quaternary ammonium salts were prepared and their performance was tested. The results are shown in Table 1 below. In addition, the compounding amount is weight%
(The same applies to other test examples).

[Table] As is clear from Table 1, quaternary ammonium salts other than the combination of mono-C _16-18 alkyl quaternary ammonium salt and di-C _20-22 alkyl quaternary ammonium salt (Example 1)
Cosmetic composition containing grade ammonium salt (Comparative Example 1-7)
It can be seen that this does not satisfy both smoothness and moist feeling. Test Example 2 Nine types of hair cosmetics with various weight ratios of mono-C _16-18 alkyl quaternary ammonium salt and di-C _20-22 alkyl quaternary ammonium salt were prepared, and their smoothness and The moist feeling was tested. The results are shown in Table 2 below.

【table】

[Table] As is clear from Table 2, when the weight ratio of mono-C _16-18 alkyl quaternary ammonium salt to di-C _20-22 alkyl quaternary ammonium salt is 1/2.5 to 1/1.5, It can be seen that both of them exhibit excellent smoothness and moist feeling. Test Example 3 A hair rinse composition having the formulation shown in Table 3 below was manufactured and its performance was evaluated. Performance evaluation is
A hair bundle (8.5 g, 20 cm) was immersed in 200 ml of a diluted 2% hair rinse composition at 40°C for 5 seconds, rinsed twice with 200 ml of warm water at 40°C for 30 seconds each, and dried. .

【table】

[Table] As is clear from Table 3, the hair rinse composition of the present invention has superior smoothness and moisturizing effects compared to conventional hair rinse compositions. Test Example 4 Hair cream compositions shown in Table 4 below were blended and their performance was evaluated.

【table】

[Table] The formulation example of the present invention had excellent "smoothness" and "moisture feeling" effects 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 and R ₆ are alkyl groups with 20 to 22 carbon atoms, R ₇ and R ₈ are alkyl groups with 1 to 3 carbon atoms or hydroxyalkyl groups, and X is a halogen atom or an alkyl group with 1 carbon number. or 2 alkyl sulfate group)