Hair cosmetic

Patent metadata

Field	Value
Publication number	US-2021069081-A1
Application number	US-201916961808-A
Country	US
Kind code	A1
Filing date	Jan 16, 2019
Priority date	Jan 16, 2018
Publication date	Mar 11, 2021
Grant date	—

Abstract

(B) a cationic polymer having a cationic charge density of 4.5 meq/g or more.

First claim

1 . A hair cosmetic, comprising:
(A) an aromatic sulfonic acid having a molecular weight of 300 or less or a salt thereof; and (B) a cationic polymer having a cationic charge density of 4.5 meq/g or more, wherein a mass ratio of the component (B) to the component (A), (B)/(A), is 0.7 or more and 5.0 or less.

2 . The hair cosmetic according to claim 1 , wherein the mass ratio of the component (B) to the component (A), (B)/(A), is 1.0 or more and 5.0 or less.

3 . The hair cosmetic according to claim 1 , wherein the component (B) has a cationic charge density of 4.5 meq/g or more and 25 meq/g or less.

4 . The hair cosmetic according to claim 1 , wherein a content of the component (B) is 20 mass % or less.

5 . The hair cosmetic according to claim 1 , further comprising:
(C) a compound represented by the formula (4) or a salt thereof:

where X represents a divalent C1-C4 hydrocarbon group optionally substituted with a hydroxy group or an amino acid residue; Y represents an amino acid residue or a divalent group represented by the following chemical formula (5):

where -* represents a bond that binds to an adjacent carbonyl group or oxygen atom; R represents a hydrogen atom or a monovalent C1-C4 hydrocarbon group optionally substituted with a hydroxy group; and m and n each represent 0 or 1 provided that when m and n are both 1, X is not an amino acid residue.

6 . The hair cosmetic according to claim 1 , being which is a hair treatment agent.

7 . The hair cosmetic according to claim 1 , which is a pretreatment agent suitable to be used before a hair bleaching agent or oxidative hair dyeing agent including a first agent comprising an alkaline agent and a second agent comprising an oxidizing agent is applied to hair.

8 . A hair bleaching or dyeing kit, comprising:
the hair cosmetic according to claim 1 ; and a hair bleaching agent or oxidative hair dyeing agent comprising a first agent comprising an alkaline agent and a second agent comprising an oxidizing agent.

9 . The hair bleaching or dyeing kit according to claim 8 , wherein the hair cosmetic is suitable to be used before the hair bleaching agent or oxidative hair dyeing agent is applied to hair.

10 . A method for pretreating hair for hair breaching or oxidative hair dyeing with a hair bleaching agent or oxidative hair dyeing agent comprising a first agent comprising an alkaline agent and a second agent comprising an oxidizing agent, the method comprising:
applying the hair cosmetic according to claim 1 to hair.

11 . A method for bleaching or dyeing hair, comprising:
applying the hair cosmetic according to claim 1 to hair; and subsequently applying a solution mixture of a first agent comprising an alkaline agent and a second agent comprising an oxidizing agent of a hair bleaching agent or an oxidative hair dyeing agent to the hair.

12 . A method for bleaching or dyeing hair, comprising:
applying a solution mixture of the hair cosmetic according to claim 1 , a first agent for a hair bleaching agent or oxidative hair dyeing agent comprising an alkaline agent, and a second agent for a hair bleaching agent or oxidative hair dyeing agent comprising an oxidizing agent to hair.

13 . A method for bleaching or dyeing hair, comprising:
applying a solution mixture of a first agent comprising an alkaline agent and a second agent comprising an oxidizing agent of a hair bleaching agent or an oxidative hair dyeing agent to hair; and subsequently applying the hair cosmetic according to claim 1 to the hair.

Assignees

• Kao Corp

Inventors

• Hiruma daisuke
• Suzawa Tomoyuki

Classifications

• A61Q5/10

  Preparations for permanently dyeing the hair · CPC title

• A61Q5/08

  Preparations for bleaching the hair · CPC title

• A61Q5/06

  Preparations for styling the hair, e.g. by temporary shaping or colouring · CPC title

• A61K8/466 Primary

  containing sulfonic acid derivatives; Salts · CPC title

• A61K8/416

  Quaternary ammonium compounds (A61K8/35 takes precedence) · CPC title