# US 7,608,251 B2 · Hair cosmetic composition

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- Number: US 7,608,251 B2
- Document ID: US7608251B2
- Status: Granted
- Kind: B2
- Application number: 11/082,802
- Filed: 2005-03-18
- Published: 2005-09-29
- Granted: 2009-10-27
- Earliest claimed: 2004-03-25
- Assignees: Kao Corporation
- Inventors: Masayoshi Nojiri; Minoru Nagai
- Web page: https://patentgrep.com/patent/US7608251B2

## CPC

- A61K 8/34: Alcohols
- A61K 8/347: {Phenols}
- A61K 8/362: Polycarboxylic acids
- A61K 8/4913: {having five membered rings, e.g. pyrrolidone carboxylic acid}
- A61K 8/4973: {with oxygen as the only hetero atom}
- A61K 8/86: Polyethers
- A61Q 5/06: Preparations for styling the hair, e.g. by temporary shaping or colouring
- A61Q 5/12: Preparations containing hair conditioners
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS

## Abstract

Provided is a hair cosmetic composition, which contains: (A) an organic polycarboxylic acid having from 5 to 40 carbon atoms in total and from 4 to 10 carboxy groups, or a salt thereof, and (B) an organic solvent selected from the group consisting of aromatic alcohols, N-alkylpyrrolidones, alkylene carbonates, polypropylene glycols, lactones and cyclic ketones, wherein the solvent has a ClogP of from −2 to 3; which composition has a pH of from 2 to 5 at 25° C. when diluted to 20 times the weight with water; and a hair quality improving method including the step of treating the hair with the hair cosmetic composition.

## Claims

### Claim 1

A hair cosmetic composition comprising the following components (A) and (B):
(A) 1,2,3,4,5,6-cyclohexanehexacarboxylic acid, or a salt thereof wherein content of component (A) is 0.5 to 10 wt.%;
2-benzyloxyethanol, wherein content of component (B) is 0.5 to 10 wt.%; and
wherein the hair cosmetic composition has a pH of from 2 to 5 at 25° C. when diluted to 20 times its weight with water.

### Claim 2 (depends on 1)

The hair cosmetic composition of claim 1, further comprising a cationic surfactant.

### Claim 3 (depends on 1)

The hair cosmetic composition of claim 1, further comprising a water soluble polymer wherein the water soluble polymer is vinylpyrrolidone/N,N-dimethylaminoethyl methacrylic acid copolymer diethyl sulfate.

### Claim 4 (depends on 1)

The hair cosmetic composition of claim 1, further comprising ethanol in an amount of from 1 to 20 wt.%.

### Claim 5 (depends on 2)

The hair cosmetic composition of claim 2, wherein a content of said cationic surfactant is from 0.01 to 10 wt.%.

### Claim 6 (depends on 1)

A method for treating hair comprising the step of applying to the hair with the hair cosmetic composition of claim 1.