JPS628083B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a hair cosmetic with excellent antistatic properties and combability. 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 form 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 antistatic properties and combability were extremely inadequate. 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 treatment agents to hair. The present invention has been made under the above circumstances, and provides a hair cosmetic that exhibits excellent antistatic properties and combability when applied to both rinsing and non-rinsing types. The purpose is to 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 in that it is contained as an essential component, and the weight ratio of ()/() is more than 1/1.5 and less than 1.5/1. 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 having 1 to 3 carbon atoms or a hydroxyalkyl group, 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 the combability will be poor. 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 alkyltriethylammonium 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 the combability will be poor. Representative examples of the second essential component include the following substances. eicosyltrimethylammonium chloride,
Heneicosyltrimethylammonium chloride, docosyltrimethylammonium chloride,
Docosyltrimethylammonium bromide, docosyltriethylammonium 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 more than 1/1.5 and less than 1.5/1. Particularly preferably, ()/()=1/
It is 1.2 to 1.2/1. If ()/() exceeds 1.5/1 or is less than 1/1.5, both antistatic properties and combability 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 monopalmitate, polyoxyethylene cetyl ether, polyoxyethylene stearate and polyoxyethylene sorbitan monolaurate; methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose 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 small amounts of ingredients 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. Antistatic property After combing a bundle of hair (8.5g, 20cm) 10 times in 20 seconds using a polyester comb, place it in a furade box, and measure the amount of electricity generated in the hair bundle by combing with an electrometer. Measure. The antistatic property was defined as the rate of decrease in the amount of electricity in the hair bundle before and after rinsing the same hair bundle with 0.5 g of a sample. Antistatic property = Q _B - Q _T /Q _B ×100 (%) Q _B : Amount of electricity before rinsing treatment (coulombs) Q _T : Amount of electricity after rinsing treatment (coulombs) Antistatic property is evaluated using the following Depends on the criteria. 90% or more: ◎ Good 70-90%: 〇 Fairly good 50-70%: △ Average 30-50%: × Slightly poor 30% or less: × × Poor combability A bundle of hair (7 g, 18 cm) was put on a polyethylene comb. ), lower the comb at a constant speed (40 mm/min). At that time, the maximum load (resistance value) applied to the comb of the hair bundle is read from a tensilon meter recorder. Combability was defined as the rate of decrease in the maximum load before and after rinsing for the same hair bundle. The measurement conditions were 25°C and 65%RH. Combability = C _B - C _T / C _B × 100 (%) C _B : Maximum load before rinsing (g) C _T : Maximum load after rinsing (g) The evaluation of combability is as follows: Depends on the criteria. 50% or more: ◎ Good 40-50%: 〇 Fairly good 30-40%: △ Fair 20-30%: × Slightly poor 20% or less: × × Poor Test example 1 9 types including various quaternary ammonium salts Hair cosmetics were prepared and tested for their antistatic properties and combability. The results are shown in Table 1 below. In addition, the blending 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 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 satisfy both antistatic properties and combability. 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 electrostatic charge was evaluated. It was tested for preventive properties and combability. The results are shown in Table 2 below.

【table】

[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 exceeds 1/1.5 and is 1.5/1 or less. It can be seen that both exhibit excellent antistatic properties and combability. Test Example 3 A hair rinse composition having the formulation shown in Table 3 below was produced, and its antistatic properties and combability were 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 better antistatic properties and combability than conventional ones. Test Example 4 Brushing agents having the formulation shown in Table 4 below were produced, and their antistatic properties and combability were evaluated.

[Table] The brushing agent of the present invention had excellent antistatic properties and combability that were not found in conventional brushing agents.

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. Contains, and the weight ratio of ()/() exceeds 1/1.5 and is 1.5/1
A hair cosmetic characterized by the following: 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. )