JPS628408B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention provides hair that significantly improves the "lack of stiffness" of the hair and has excellent performance in terms of "combability", "smoothness", "moisturizing feeling" and "antistatic property". Regarding cosmetics. Conventional hair cosmetics have mainly contained quaternary ammonium salts such as dialkyldimethylammonium chloride and alkyltrimethylammonium chloride as the main active ingredient. These hair cosmetics have the effect of adsorbing to the anion moieties of hair, reducing electrostatic charge, eliminating flying of the hair during combing, and improving combability. However, hair cosmetics containing such quaternary ammonium salts as the main active ingredient, in order to impart flexibility to the hair, may actually weaken the "waist" of the hair.
As a result, the hair loses its fullness and volume, and the hair as a whole becomes cat hair-like, resulting in poor hair treatment (setting and waving) properties. The present invention was made under these circumstances, and it significantly improves the "lack of elasticity" of hair, which is a drawback of conventional hair cosmetics, and improves "combability" and "smoothness". The purpose of the present invention is to provide a hair cosmetic having excellent performance in terms of "moisturizing feeling" and "antistatic property". That is, the hair cosmetic of the present invention is characterized by containing a sulfated polysaccharide and an amino acid. Hereinafter, the hair cosmetic of the present invention will be explained in detail. The sulfated polysaccharide, which is the first essential component of the hair cosmetic of the present invention, may be either natural or synthetic, and natural ones include Katupa carrageenan, lambda carrageenan, iota carrageenan, and furcelan. Contains seaweed extract
Synthetic ones include sulfated cellulose salts and sulfated starch salts. Among these sulfated polysaccharides, the content of sulfate groups (as SO ₄ ) is 10
~40% by weight is preferred, more preferably 20% by weight.
~35% by weight is preferable. Particularly preferred sulfated polysaccharides are also katupar-carrageenan and iota-carrageenan. The blending amount of these sulfated polysaccharides is preferably in the range of 0.05 to 5.0% by weight, particularly preferably in the range of 0.5 to 3.0% by weight, based on the total amount of the hair cosmetic. The amino acids that are the second essential component of the present invention include glycine, alanine, leucine, isoleucine, cysteine, arginine, histidine, lysine, methionine, phenylalanine, threonine, tryptophanbaline, aspartic acid, glutamic acid, and oxyglutamic acid. , oxyproline, norleucine, proline, serine, tyrosine, pyrrolidone carboxylic acid, etc. These amino acids can be used not only singly but also as a mixture. Particularly preferred among these amino acids are glycine, leucine, and cysteine. The blending amount of these amino acids is preferably in the range of 0.01 to 5.0% by weight, more preferably 0.1 to 3.0% by weight based on the total amount of the hair cosmetic. The ratio of the sulfated polysaccharide and amino acid explained above is such that the number of moles of amino acid () to the number of moles of sulfate groups contained in the sulfated polysaccharide () is ()/() = 1/2 to 5/1. It is preferable to select such a range. Particularly preferred ()/() is 2/1 to 5/1. The total amount of sulfated polysaccharides and amino acids is preferably 0.1 to 10.0% by weight, more preferably 0.1 to 5.0% by weight based on the total amount of the hair cosmetic. It is possible to incorporate other optional ingredients into the hair cosmetic of the present invention 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; polyoxyethylene cetyl ether, polyoxy Emulsifiers such as ethylene stearate and polyoxyethylene sorbitan monolaurate; Cellulose derivatives such as methyl cellulose, hydroxyethyl cellulose, and hydroxypropyl cellulose; Thickeners such as natural polymers; ethylene glycol, propylene glycol, 1,3-butylene Humectants such as glycol, glycerin, and sorbitol; and other minor ingredients such as solvents, disinfectants, and fragrances. The hair cosmetic composition of the present invention can be used in various applications such as hair rinse agents, hair conditioners, hair lotions, and the like. 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
A single piece of hair with a load of 40 g applied to both ends was placed on the pulley, and the friction coefficient was measured when the pulley was rotated at a rotational speed of 2 rpm, and this was determined as the static friction coefficient. The evaluation of the 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 Antistatic property After combing a bundle of hair (8.5 g, 20 cm) 10 times in 20 seconds using a polyester comb, comb it with a furaday. Place the hair in a box and measure the amount of electricity generated in the hair bundle by combing it using an electrometer. 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) The evaluation of antistatic property is as follows: Depends on the criteria. 90% or more: ◎ Good 70-90%: ○ Fairly good 50-70%: △ Fair 30-50%: × Slightly inferior 30% or less: × × Poor Test example 1 16 containing various amino acids and sulfated polysaccharides Various hair cosmetics were prepared and tested for their performance. In addition, performance evaluation was performed on products whose pH was adjusted to 4 to 6 using citric acid or sodium citrate as a pH adjuster. The results are shown in Table-1. The blending amounts in the table are weight % (the same applies to other test examples). As is clear from Table 1, the examples in which sulfated polysaccharides and amino acids were blended (Examples 1 to 3) all exhibited excellent performance, whereas the other examples (Comparative Examples) 1 to 13), it can be seen that the effects of the present invention cannot be obtained.

[Table] Test Example 2 Ratio between the number of moles of amino acid () and the number of moles of sulfated polysaccharide per sulfate group () ()/()
We prepared 17 types of hair cosmetics with various changes and tested their performance. The results are shown in Table-2. As is clear from Table 2, the molar ratio ()/
It can be seen that excellent performance is exhibited when () is 1/2 to 5/1.

[Table] Test Example 3 Seven types of hair cosmetics containing various amounts of amino acids and sulfated polysaccharides were prepared and their performance was tested. The results are shown in Table-3. As is clear from Table 3, the blended amount of amino acids is 0.01 to 5.0% by weight, and the blended amount of sulfated polysaccharides is 0.05%.
It can be seen that excellent performance is exhibited when the content is ~5.0% by weight.

[Table] Test Example 4 A hair rinse composition having the formulation shown in Table 4 was prepared and its performance was evaluated. Performance evaluation was performed by applying 0.8 g of the hair rinse composition directly 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 4, the hair cosmetic of the present invention applied to the hair rinse composition shows excellent performance.

【table】

【table】

[Table] Test Example 5 A hair treatment having the composition shown in Table 5 was prepared and its performance was evaluated. As a result, the hair cosmetic of the present invention applied to hair treatment had unprecedented properties of elasticity, moisturizing feel, combability, static friction coefficient, and antistatic properties.

【table】

【table】

Claims (1)

[Claims] 1 One or more sulfated polysaccharides selected from the group consisting of carrageenan, fuaselan, sulfated cellulose, and sulfated starch 0.05 to 5.0
% by weight and 0.01 to 5.0% by weight of amino acids, and the number of moles of amino acids [], that is, ()/(), is 1/2 to the number of moles [] of sulfate groups contained in the sulfated polysaccharide. A hair cosmetic characterized by having a ratio of 5/1.