95.
    发明专利
    未知

    公开(公告)号:FR2603483B1

    公开(公告)日:1989-04-28

    申请号:FR8712237

    申请日:1987-09-03

    Applicant: OREAL

    Abstract: The invention relates to a dyeing composition for keratinous fibres containing, in a cosmetically acceptable solvent medium, at least one para-type oxidation dye precursor in combination with at least one heterocyclic coupler of formula: (I) in which R denotes a hydrogen atom, a C1-C4 radical, a C2-C4 hydroxyalkyl radical, a C3 to C6 polyhydroxyalkyl radical, or a C2-C6 alkoxyalkyl radical, Z, independently of R, denotes a C1 to C4 alkyl radical, a C2 to C4 hydroxyalkyl radical, a C3 to C6 polyhydroxyalkyl radical, a C2-C6 alkoxyalkyl radical or a trifluoroethyl radical, R1 and R2 independently of each other denote a hydrogen atom or a C1 to C4 alkyl radical, or one of the addition salts of the compound of formula (I) with an inorganic acid, a process for the oxidation dyeing of hair using this composition as well as the new couplers of formula (I) where Z is other than methyl when R1, R2 and R=H, the process for their preparation, the new intermediate compounds of formula: (II') and the process for their preparation.

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