Kao Corporation

Yuko Nobuto

Makoto Iijima

Takashi Matsuo

Naohiro Ando

Masayoshi Nojiri

Yuki Naoi

A two-part foam hair dye which comprises a first part comprising an alkali agent, a second part comprising hydrogen peroxide, and a non-aerosol foamer container, wherein the first part comprises the components (A) to (D), an equivalent ratio of a anion site of the component (A) to a cation site of the component (B) (anion/cation) is more than 1, a mass ratio of a content of the component (C) to content of the component (D) ((C)/(D)) is 5 or less, and the liquid mixture has a viscosity (25&#xb0; C.) of 1 to 300 mPa&#xb7;s: (A) a carboxylic acid anion surfactant, (B) a polymer or copolymer having a mole fraction of diallyldimethyl quaternary ammonium salt monomer of 70% or more, (C) 0.5 to 1.5% by mass of an oxidation dye having a meta-dihydroxybenzene structure, and (D) 0.1 to 9% by mass of polypropyleneglycol of Mw 200 to 1200.

Two-part foam hair dye

A two-part hair dye composed of a first part containing an alkali agent, a second part containing hydrogen peroxide, and a non-aerosol foamer container for discharging a liquid mixture of the first part and the second part in the form of a foam, the liquid mixture containing the following components (A) and (B): (A) a polymer or copolymer containing 70% or more mole fraction of diallyldimethyl quaternary ammonium salt monomer, and (B) an N-acylamino acid salt, an N-acyl-N-alkylamino acid salt, or an ether carboxylic acid salt, wherein, an equivalent ratio of the anion site of the component (B) to the cation site of the component (A) (anion/cation) is more than 1.

Two-part hair dye

A two-part hair dye composed of a first part containing an alkali agent, a second part containing hydrogen peroxide, and a non-aerosol foamer container for discharging a liquid mixture of the first part and the second part in the form of a foam, the liquid mixture containing the following components (A) and (B): (A) a polymer or copolymer containing 70% or more mole fraction of diallyldimethyl quaternary ammonium salt monomer, and (B) an N-acylamino acid salt, an N-acyl-N-alkylamino acid salt, or an ether carboxylic acid salt, wherein, an equivalent ratio of the anion site of the component (B) to the cation site of the component (A) (anion/cation) is more than 1, and a viscosity of the liquid mixture at 25&#xb0; C. is 1 to 300 mPa&#xb7;s.

A hair dye composition which is provided by mixing a first-part agent containing an alkaline agent and a second-part agent containing an oxidizing agent upon application, comprising, after mixing, components (a) to (c) and an oxidative dye (d) as needed, wherein the pH after mixing is 8 to 12 and the content of component (a) is 0.1 to 20 wt. %: 

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Sumida-ku, Japan

Yuko Nobuto