[EN] NOVEL COUPLER FOR USE IN OXIDATIVE HAIR DYEING<br/>[FR] AGENT DE COUPLAGE UTILISE EN TEINTURE CAPILLAIRE OXYDANTE
申请人:CLAIROL INC
公开号:WO2002047635A1
公开(公告)日:2002-06-20
Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of the formula at least one coupler comprising a compound of the formula (1): wherein R is selected from of C1 to C2 alkyl and hydroxyethyl, R?1 and R2¿ are each independently selected from the group consisting of C¿1? to C5 alkyl, C3 to C6 cycloalkyl, C1 to C5 alkoxy, C1 to C5 hydroxyalkyl, C1 to C5 hydroxyalkoxy, or R?1 and R2¿ together with the carbon atom to which they are attached form a C¿3? to C6 cycloalkyl group.