| 摘要 |
PURPOSE:To obtain the subject hair-dye causing the autoxidation and color development in a short time in good state, capable of dyeing hair in natural dark color and giving little stimulation to the skin using a specific p- phenylenediamine derivative in combination with other compound as oxidation dye. CONSTITUTION:The objective hair-dye contains oxidation dye consisting of (A) a p-phenylenediamine derivative of formula (R<1> and R<2> are H, alkyl or hydroxyalkyl provided that R<1> and R<2> are not H at the same time), e.g., N- ethyl-beta-hydroxyethyl-p-phenylenediamine or its salt (e.g., sulfate) and (B) 2,4- diaminophenol or its salt (e.g., sulfate). The amount of the component A is usually 0.1-5mol per 1mol of the component B and the amount of the oxidation dye to be compounded to the hair dye is usually 0.01-10wt.%. The hair-dye exhibits excellent dyeing capability and color fastness and is directly applied to the hair without using an oxidizing agent. |
