Kao Corporation

Keiji Monda

Takeshi Iizaki

Shunsuke Watanabe

Fumina Abo

Yoshiaki Ito

Takashi Matsuo

Silvio Aime

Hajime Miyabe

Daisuke Misu

Giovanni Battista Giovenzana

Masahiko Watanabe

Yutaka Shibata

Simona Ghiani

Carlo Nervi

Simona Baroni

A liquid hair dye composition comprising components (A), (B) and (C), wherein a content of the component (A) is 1.5 mass % or more, (A) an azo dye selected from the group consisting of the following formulae (A-1), (A-2) and (A-3); (B) a surfactant with an HLB of 7 or more, selected from the group consisting of anionic surfactants, nonionic surfactants and amphoteric surfactants; and (C) water.

Liquid hair dye composition

A powder hair dye composition, containing the following components (A) to (C): (A) one or more azo dyes selected from the group consisting of the following (A-1), (A-2) and (A-3), (B) an alkaline agent other than alkanolamines, and (C) 1.5 mass % or more and 40 mass % or less of solvent. 

Powder hair dye composition

A hair dyeing method including the following steps (I) and (II): step (I): mixing a first agent comprising an alkaline agent and an oxidation dye precursor, a second agent comprising an oxidizing agent, and a third agent comprising one or more dyes (A) selected from the group consisting of the following (A-1), (A-2), and (A-3), having a pH at 25&#xb0; C. of 7.5 or more and 12 or less when diluted to be 10 times by mass with water; and step (II): applying a mixed solution prepared in step (I) on hair. 

Hair dyeing method

A liquid hair dye composition comprising components (A) and (B), wherein 

A liquid hair dye composition comprising the following components (A) and (B), wherein 

A liquid hair dye composition, comprising components (A) and (B), wherein the content (X) of component (A) in the composition is 1.5 mass % or more and 9.3 mass % or less, the content (Y) of component (B) in the composition is 9 mass % or more and 98.5 mass % or less, and the liquid hair dye composition satisfies the following formula (1) (with the proviso that a liquid hair dye composition which has the content of diol of 50 mass % or more and the content of water of 2 mass % or less is excluded), Y&#x2265;10.875X&#x2212;10.875 (1), (A) an azo dye of the formula (A-1), and (B) a monoalcohol and/or a diol other than alkanolamines. 

A hair dye composition including a first part containing an alkaline agent and a second part containing an oxidizing agent, which are mixed together immediately before use, wherein at least one of the first part and the second part contains a diazacycloheptane represented by the following general formula (1) or a salt thereof, and the pH of the mixture is 7.5 to 12; 

Hair dye composition

The invention provides a bleach composition or a dye composition for hair which, during use, includes a mixture of a first composition containing an alkali agent and a second composition containing an oxidizing agent, the bleach or dye composition containing (A) an organic solvent having a partition coefficient (octanol-water) (log P) at 25&#xb0; C. of 0.3-6 and a molecular weight of 200 or less, in an amount of 1-70 wt. %; (B) an organic solvent having a log P of less than 0.3, in an amount of 0-8 wt. % and less than that of component (A); (C) an alkali agent in an amount of 0.1-10 wt. %; (D) an oxidizing agent in an amount of 0.1-12 wt. % as reduced to HO; and (E) water in an amount of 20-70 wt. %, or (A) in an amount of 1-70 wt. %; (B) in an amount of 0-8 wt. % and less than that of component (A); (C) in an amount of 0.1-10 wt. %; (D) in an amount of 0.1-12 wt. % as reduced to HO; (E) in an amount of 20-70 wt. %, and (F) a cationic surfactant in an amount of 0.01-10 wt. %, and has a pH of 7.5-12 after mixing of the first composition and the second composition. The bleach or dye composition provides less offensive odor; exhibit excellent hair-bleaching power and hair-dyeing power; and exhibit excellent hair-conditioning effect during and after treatment.

Growing community of inventors

Katsusika-ku, Japan

Keiji Monda