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    • 7. 发明申请
    • Hair colorants with vat dyes
    • 头发着色剂与瓮染料
    • US20070180630A1
    • 2007-08-09
    • US10590258
    • 2004-11-24
    • Manuela JavetCatherine MuellerAnita Roulin
    • Manuela JavetCatherine MuellerAnita Roulin
    • A61K8/00
    • A61Q5/10A61K8/35A61Q5/065
    • The agent for dyeing hair has a pH of 4 to 11 and contains a reduced vat dye, which is obtained by reducing a vat dye, such as an anthrquinonoid dye, with a reducing agent compound that forms an enediol in an alkaline medium, preferably acetoin, monohydroxyacetone, and dihydroxyacetone. The method of dyeing hair includes pre-reducing the vat dye with the reducing agent compound at a pH of from 10 to 13 to form the reduced vat dye, providing an agent for dyeing the hair having a pH of from 4 to 11 and containing the reduced vat dye, allowing the agent to act on the hair while protecting the reduced vat dye in the agent from atmospheric oxygen, and then re-oxidizing with atmospheric oxygen or an oxidant.
    • 毛发染色剂的pH为4〜11,含有还原的瓮染料,其是通过在碱性介质中形成烯二醇的还原剂化合物,例如蒽醌类染料,优选乙偶姻, ,单羟基丙酮和二羟基丙酮。 头发染色方法包括用还原剂化合物在10至13的pH下还原还原染料以形成还原的瓮染料,提供用于染发pH为4至11的头发的试剂,并含有 减少的瓮染料,允许试剂作用于毛发上,同时保护试剂中的还原瓮染料免受大气氧,然后用大气氧或氧化剂再次氧化。