JPS628403B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a hair cosmetic containing an amphoteric surfactant and a sulfated polysaccharide, and particularly to a hair cosmetic that improves the "lackiness" of hair caused by conventional hair cosmetics. As conventional hair cosmetics, those containing quaternary ammonium salts such as dialkyldimethylammonium and alkyltrimethylammonium chloride as a main active ingredient are often used. These hair cosmetics have the effect of eliminating flying of the hair during combing and improving the combability of the hair by adsorbing to the anion moieties of the hair and reducing the electrification of the hair. However, hair cosmetics containing such quaternary ammonium salts give excessive flexibility to the hair, causing the hair to lose its elasticity, resulting in a cat-hair-like hair that lacks fullness and volume. This causes the hair to become dull and the subsequent hair treatment (setting, waving, etc.) deteriorates. As a result of intensive research to solve the problems of conventional hair cosmetics, the present inventors found that
Not only has the ``lack of elasticity'' of hair, which is considered a drawback of conventional hair cosmetics such as hair rinses, hair treatments, and set lotions, been significantly improved, but it has also improved ``combability'', ``smoothness'', and We have completed a hair cosmetic that has excellent performance in terms of "moisturizing feeling" as well. That is, the hair cosmetic of the present invention contains one or more amphoteric surfactants selected from the group consisting of imidazolium betaine, sulfobetaine, N-acyl-β-alanine salts, and lecithin, and carrageenan, furcelan, and It is characterized by containing a mixture or a reaction mixture with one or more sulfated polysaccharides selected from the group consisting of sulfated cellulose. Hereinafter, the hair cosmetic of the present invention will be specifically explained. The amphoteric surfactant used in the hair cosmetic of the present invention may be either natural or synthetic. The natural amphoteric surfactant is lecithin, and the synthetic amphoteric surfactant is 2-cocoyl-N-
Carboxymethyl-N-hydroxyethylimidazolium betaine, lauryl (2-hydroxy-
3-sulfopropyl) dimethylammonium betaine, myristyl (2-hydroxy-3-sulfopropyl) dimethylammonium betaine, palmityl (2-hydroxy-3-sulfopropyl)
Dimethylammonium betaine, N-lauroyl-β-alanine salt, etc. where the alkyl group has 12 or more carbon atoms
There are 22 of them. Note that the above salts are all alkali metal salts, ammonium salts, and alkanolamine acids. Among the above natural or synthetic amphoteric surfactants,
Particularly preferred are 2-cocoyl-N-carboxymethyl-N-hydroxyethylimidazolium betaine and lecithin. The blending amount of the amphoteric surfactant is preferably 0.05 to 6.0% by weight, more preferably 0.1 to 3.0% by weight based on the hair cosmetic. The sulfated polysaccharide used in the hair cosmetic of the present invention may be either natural or synthetic. Natural sulfated polysaccharides include seaweed extracts such as cutupa-carrageenan, lambda-carrageenan, iota-carrageenan, and fuaselan, and synthetic sulfated polysaccharides include sulfated cellulose salts. Preferred sulfated polysaccharides are also katupa-carrageenan and iota-carrageenan. Particularly preferred sulfated polysaccharides have a sulfate group content of 10 to 50% by weight, more preferably 20 to 35% by weight. The blending amount of the sulfated polysaccharide is preferably 0.05 to 6.0% by weight, more preferably 0.1 to 3.0% by weight based on the hair cosmetic. The weight ratio (()/()) of the amphoteric surfactant () and the sulfated polysaccharide () explained above is 1/
The ratio is preferably 4 to 4/1. The above-mentioned amphoteric surfactants and sulfated polysaccharides form various polyion complexes in aqueous media. Therefore, in the hair cosmetic of the present invention containing a mixture of an amphoteric surfactant and a sulfated polysaccharide as an essential component, when water is used as a solvent or when water is added at the time of use, A variety of such polyion complexes are necessarily included. This polyion complex is an important substance in exerting the effects of the hair cosmetic of the present invention, and can be produced not only by the reaction between an amphoteric surfactant and a sulfated polysaccharide, but also separately formed. It is also possible to mix it inside. In either case, the amount of polyion complex in the hair cosmetic is 0.1 to
Preferably it is 12.0% by weight, more preferably
It is 0.1-6.0% by weight. The amphoteric surfactant and the sulfated polysaccharide form a polyion complex in an aqueous medium according to the following reaction formula. The following optional ingredients can be incorporated into the hair cosmetic of the present invention within a range that does not affect the effects of the present invention. 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; polyoxyethylene cetyl ether, polyoxyethylene Emulsifiers such as stearate esters and polyoxyethylene sorbitan monolaurate; cellulose derivatives such as methylcellulose, hydroxyethylcellulose and hydroxypropylcellulose; humectants such as ethylene glycol, propylene glycol, 1,3-butylene glycol, glycerin and sorbitol; and Other small amounts of ingredients include solvents, disinfectants, fragrances, etc. 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. Before explaining each example, the test method will be explained. Strength in the lower back, moist feeling Apply 0.5 g of the sample directly to a shampoo-treated hair bundle (5 g, 20 cm), spread it evenly by hand, and then place it in an atmosphere of 25°C and 65% RH (relative humidity). After drying the hair and leaving it for a day and night, a panel of 20 people evaluated the ``strength and moistness'' of the hair strands. Evaluation criteria are 1.0% by weight stearyltrimethylammonium chloride, 3.0% by weight
of cetyl alcohol, 5.0% by weight of propylene glycol, and water (balance) (comparative example 1) was used as the standard (2.0) of 1.0 to 5.0.
The test results are the average values of 20 panelists. Combability After passing a bundle of hair (7 g, 18 cm) through a polyethylene comb, lower the comb at a constant speed (40 m/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%: ○ Fairly good 30-40%: △ Average 20-30%: × Slightly inferior 20% or less: × × Poor static friction coefficient Friction coefficient meter
Place a piece of hair with a load of 40 g on both ends of the pulley (made of aluminum), and then pull the pulley.
The friction coefficient when rotating at a rotational speed of 2 rpm was measured, and this was taken as the static friction coefficient. Evaluation of static friction coefficient is based on the following criteria. A: Static friction coefficient less than 0.12 B: 〃 0.12 to less than 0.14 C: 〃 0.14 or more Test Example 1 Eight types of hair cosmetics containing various amphoteric surfactants and sulfated polysaccharides were prepared, and their Tests were conducted for ``strength'', ``moist feeling'', ``combability'', and ``coefficient of static friction''. 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, a hair cosmetic containing imidazolium betaine and carrageenan (Example 3), and a hair cosmetic containing a polyion complex which is a reaction product thereof (Example 1,
2) all show excellent performance, whereas hair cosmetics containing either an amphoteric surfactant or a sulfated polysaccharide (Comparative Examples 1 to 8) do not exhibit the effects of the present invention. I know that I can't get it. Test Example 2 17 types of hair cosmetics were prepared, including those containing different amounts and weight ratios of amphoteric surfactant and sulfated polysaccharide, and those containing a polyion complex.
Their performance was tested. Table 2 shows the results.
Shown below.

【table】

[Table] As is clear from Table 2, the hair cosmetics of the present invention all had excellent performance. Test Example 3 A hair rinse composition having the formulation shown in Table 3 was prepared and its performance was evaluated. Performance evaluation was performed by directly applying 0.8 g of the hair rinse composition to a hair bundle (8 g, 25 cm), rinsing twice with 200 ml of 40°C warm water five times, and drying. As is clear from Table 3, the hair rinse composition of the present invention had excellent performance.

【table】

[Table] Test Example 4 A hair treatment having the composition shown in Table 4 was prepared and its performance was evaluated.

【table】

[Table] The hair treatment of the present invention had unprecedented excellent stiffness, moisturizing feeling, combability, and coefficient of static friction.

Claims (1)

[Claims] 1. Imidazolium betaine, sulfobetaine,
One or two amphoteric surfactants selected from the group consisting of N-acyl-β-alanine salts and lecithin
1. A hair cosmetic comprising a mixture or a reaction mixture of one or more sulfated polysaccharides selected from the group consisting of carrageenan, furcellan, and sulfated cellulose. 2. The amount of the amphoteric surfactant and sulfated polysaccharide is 0.05 to 6.0 per hair cosmetic.
The hair cosmetic according to claim 1, characterized in that the amount is % by weight. 3 The weight ratio (()/()) of the amphoteric surfactant () and the sulfated polysaccharide () is 1/4 to
The hair cosmetic according to claim 2, characterized in that the ratio is 4/1.