JP3127658B2 - Hair cosmetics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair cosmetic which retains an appropriate amount of moisture on hair and imparts a smooth feel.

[0002]

2. Description of the Related Art Hair moisture is important from the viewpoint of hair protection, and various attempts have been made to impart appropriate moisture to hair. For example, hair cosmetics such as hair treatments and hair rinses are blended with moisturizing ingredients such as polyhydric alcohols such as pyrrolidone carboxylate and glycerin, hyaluronic acid, protein derivatives, urea, and higher alcohols, petrolatum, animal and vegetable oils and fats. However, if the oil is used to increase the water content of the hair, it may cause inconvenience such as a feeling of use.

Studies have been made on humectants. For example, Japanese Patent Application Laid-Open No. 55-149369 discloses that
It has been disclosed that a wetting agent composition of -pyrrolidone-5-carboxylic acid exhibits an excellent moisturizing effect.
JP-A-6-71020 discloses that 2-pyrrolidone-5-carboxylic acid basic amino acid can be added to cosmetics for the purpose of enhancing moisture retention. However, the moisturizing component originally has poor affinity for the hair, and almost no effect can be expected particularly in a preparation used after washing, such as a hair rinse. Therefore, the development of a hair cosmetic that retains a suitable amount of moisture in the hair even when washed out and imparts a smooth and excellent feel is desired. In view of such circumstances, it is an object of the present invention to provide a hair cosmetic that retains an appropriate amount of moisture in hair even when washed out, and is excellent in feel.

[0004]

Means for Solving the Problems As a result of intensive studies, the present inventor has found that one or more selected from the group consisting of pyrrolidone carboxylic acid, lactic acid, proline and acidic amino acids and one or more cationic polymers. By combining and combining two or more types, it has been found that there is an effect of synergistically supplementing the moisture of the hair (hygroscopicity) and retaining the moisture (water retention), thereby completing the present invention.

That is, the present invention relates to hair obtained by combining one or more selected from the group consisting of pyrrolidonecarboxylic acid, lactic acid, proline and acidic amino acids with one or more cationic polymers. The present invention relates to a hair cosmetic composition having an excellent feeling of imparting appropriate moisture to the hair.

Hereinafter, the present invention will be described in detail. The present invention comprises (A) one or more selected from the group consisting of pyrrolidonecarboxylic acid, lactic acid, proline, and acidic amino acid, and (B) one or more cationic polymers, : A ratio of (B) is 1:10 to 10: 1, and a total amount of (A) and (B) is 0.1 to 10%. The component (A) used is pyrrolidone carboxylic acid, lactic acid, proline, or an acidic amino acid. Examples of the acidic amino acid include glutamic acid and aspartic acid. These are all known components and are commercially available. Among the components (A), pyrrolidonecarboxylic acid and proline are particularly preferred.

Representative examples of the cationic polymer used in the hair cosmetic of the present invention include polyethyleneimine (Epomin SP-006, Epomin P-1000: manufactured by Nippon Shokubai) and cationized cellulose derivative (Catinal HC)
-100: manufactured by Toho Kagaku), cationized polysaccharide derivative (Labor Gum CGM: manufactured by Dainippon Pharmaceutical), cationized protein derivative (Promois W-42QP: manufactured by Seiwa Kasei), polyethylene glycol / epichlorohydrin /
Condensation product of propyleneamine / tallow fatty acid (Polycoat H: Henkel), dimethyldiallylammonium chloride polymer (Mercoat 100: Merck), dimethyldiallylammonium chloride / acrylamide copolymer (Mercoat 550: Merck), vinylpyrrolidone / Dimethylaminoethyl methacrylate copolymer cationized product (Guffcoat 755, Guffcoat 734: I
SP).

These cationic polymers may be used alone or in combination of two or more. Among them, polyethyleneimine is preferable, and polyethyleneimine having a molecular weight of 300 to 2,000 is particularly preferable.

The ratio (weight ratio) of (A) and (B) is in the range of 1:10 to 10: 1.
A range of 5: 1 is preferred. When (A) with respect to the cationic polymer (B) is out of the range of 1:10 to 10: 1,
Moist feeling is not sufficiently imparted to the hair. Also, (A)
The total amount of (B) is preferably in the range of 0.1% by weight to 10% by weight, particularly preferably 1% by weight to 5% by weight. 0.1% by weight
If less than 10%, the effect of imparting a moist feeling is not sufficient, and if it exceeds 10% by weight, a sticky feel is given.

[0010] The form of the hair cosmetic of the present invention is not particularly limited, and may be in the form of a hair rinse, an emulsion, a blowing agent, a hair treatment, a hair mousse, a hair essence, or the like. The other ingredients are not particularly limited, and those usually used in this type of cosmetic are used. In addition, if necessary, the hair cosmetic of the present invention can appropriately mix well-known components within a range that does not impair the performance, and examples thereof include an oil, a colorant, an emulsifier, a fragrance,
Solvents such as water and ethanol; antistatic agents such as cationic activators; liquefied petroleum gas; and propellants such as dimethyl ether.

[0011]

Next, the present invention will be described in more detail with reference to Examples and Comparative Examples. Needless to say, the present invention is not limited to these examples. [%] In Examples and Comparative Examples means% by weight. The components shown in Table 1 were mixed and stirred to obtain a hair cosmetic. Next, these were evaluated as follows.

(Evaluation Method) (1) Water Retention Approximately 10 g of each of the mixed aqueous solutions of polyethyleneimine and pyrrolidone carboxylic acid shown in Table 1 was precisely weighed (Wa) and weighed after placing at 80 ° C. for 5 hours. Wb) was measured to determine the change in water retention. In addition, the water retention change was calculated | required on the same conditions using the polyethylene imine aqueous solution corresponding to each density | concentration as a control. The formula for calculating the water retention (%) is shown in formula (I).

[0013]

(Equation 1)

(2) Hygroscopicity After the water retention was determined, the water absorption was subsequently determined at 20 ° C. and a relative humidity of 80%.
The weight (Wc) was measured at intervals of 7 hours under the conditions described above to determine the change in the amount of absorbed moisture. In addition, the hygroscopic property was calculated | required similarly with the control. The equation for calculating the hygroscopicity (%) is shown in equation (II).

[0015]

(Equation 2)

As shown in Table 1, synergistic improvements in water retention and hygroscopicity are clearly observed.

[0017]

[Table 1]

Next, Examples 6 to 11 and Comparative Examples 5 to 10 shown in Table 2 were prepared by a conventional method and used for performance evaluation. The performance evaluation method is as follows. (3) Performance evaluation Moist feeling at the time of application Sensory evaluation by 5 panelists (female in their 20s) ○: 4 of expert panelists who determined that there was "moist feeling"
No less than ×: 4 expert panelists who judged that “they have a moist feeling”
Less than name Moist feeling after rinsing Sensory evaluation by 5 specialized panelists (female in their 20s) ○: 4 expert panelists who judged that there was "moist feeling"
More than name ×: 4 panelists specialized in judging “moist”
Less than names Suppleness after rinsing Sensory evaluation by 5 panelists (female in their 20s) ○: 4 panelists judged to have "suppleness"
Or more ×: 4 expert panelists who judged that there is “suppleness”
Less than name Overall rating ○: Moist feeling after application and rinsing, supple after rinsing ×: No moist feeling after application or rinsing, or no suppleness after rinsing

[0019]

As shown in Table 2, all of the examples are superior in the effect of imparting a moist feeling to the hair and giving a supple finish as compared with the comparative examples.

Further, the following examples were prepared. Example 17 (Emulsion) Ingredient Content (%) (Ingredient A) Pyrrolidone carboxylic acid 2.0 Polyethylenimine (molecular weight: 300) 2.0 1, 3-butylene glycol 1.0 Polyoxyethylene (5) cetyl ether 1 .2 Carboxyvinyl polymer 0.1 Water balance (Component B) Liquid paraffin 2.0 (Component C) Triethanolamine 0.1 Total 100.0 Component A heated to 60 ° C and Component B heated to 60 ° C The mixture was stirred and mixed. Then component C was added while cooling.

Example 12 (Hair blowing agent) Ingredients Compounding amount (%) Lactic acid 1.0 Cationized protein 1.0 Polyoxyethylene (60) hydrogenated castor oil 0.5 Fragrance 0.1 95% ethanol 10.0 Water residue Amount Total 100.0 The above components were sequentially added and dissolved by stirring.

Example 13 (Hair Treatment) Ingredient Content (%) (Component A) Stearyltrimethylammonium Chloride 3.0 Cetyl Alcohol 3.0 Methylpolysiloxane 3.0 (Component B) Proline 4.0 Propylene Glycol 5. 0 Preservative trace amount cationized guar gum 2.0 water remaining amount (component C) fragrance 0.1 total 100.0 component B was mixed and kept at 80 ° C, and component A was separately mixed and kept at 80 ° C. Things were added. Ingredient C while stirring
Was added to produce a hair treatment.

Example 14 (Hair Mousse) Ingredient Content (%) (Ingredient A) Pyrrolidone carboxylic acid 1.0 Polyethyleneimine (molecular weight 70000) 0.5 Polyether-modified silicone 0.5 Hamamelis extract 0.1 Water Remaining amount (Component B) 95% ethanol 5.0 Flavor 0.1 Component A was uniformly stirred and mixed at room temperature, and then Component B was added to prepare a stock solution. 90 parts of this stock solution and 10 parts of propellant (liquefied petroleum gas) were filled in an aerosol container to produce a hair mousse.

[0024]

According to the present invention, the use of a pyrrolidonecarboxylic acid or the like and a cationic polymer synergistically improve the water retention and hygroscopicity of the hair, maintain an appropriate amount of water in the hair, and improve the smoothness of the hair. The present invention can provide an excellent hair cosmetic composition capable of imparting a comfortable feel.

[Table 1]

[Table 1]

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61K 7/06

Claims (2)

(57) [Claims] 1. A composition comprising (A) one or more kinds selected from the group consisting of pyrrolidone carboxylic acid, lactic acid, proline and acidic amino acids, and (B) one or more kinds of cationic polymers , The ratio of A) :( B) is 1:10
10: 1 (weight ratio), and the combined amount of (A) and (B)
A hair cosmetic characterized in that the total amount is 0.1 to 10% by weight . 2. Component (A) is pyrrolidone carboxylic acid.
The hair cosmetic composition according to claim 1.