Compositions for the oxidation dyeing of keratinous fibers comprising at least one coupler, and dyeing methods
申请人:——
公开号:US20010034914A1
公开(公告)日:2001-11-01
Compositions for oxidation dyeing keratinous fibers, for example, human keratinous fibers such as hair, comprising at least one oxidation base and at least one coupler chosen from N-(2-hydroxybenzene)carbamate and N-(2-hydroxybenzene)urea compounds and their acid addition salts of formula (I) and processes comprising such compositions.
Oxidation dyeing composition for keratinous fibres comprising a n-(2-hydrobenzene)-carbamate or a n-(2-hydroxy-benzene)-urea and a pyrazolopyrimine, dyeing methods
申请人:——
公开号:US20020178512A1
公开(公告)日:2002-12-05
The subject of the invention is a composition for the oxidation dyeing of keratinous fibers, and in particular human keratinous fibers such as hair, comprising at least one oxidation base, chosen from the pyrazolopyrimidines, and, as coupler, at least one N-(2-hydroxybenzene)carbamate or one N-(2-hydroxy-benzene)urea of formula (I), their use as coupler for the oxidation dyeing of keratinous fibers, and the oxidation dyeing methods using them.