154.
    发明专利
    未知

    公开(公告)号:IT1144834B

    公开(公告)日:1986-10-29

    申请号:IT6833981

    申请日:1981-10-15

    Applicant: OREAL

    Abstract: The invention provides novel nitro-paraphenylenediamine derivatives of the formula: in which R1 denotes an alkyl group, a monohydroxy- or polyhydroxy-alkyl group or an aminoalkyl group, the amino group of which is optionally monosubstituted or disubstituted by an alkyl group, and R2 denotes an alkyl group, or a cosmetically acceptable salt thereof. These derivatives are useful as direct dyes, especially for dyeing human hair.

    156.
    发明专利
    未知

    公开(公告)号:LU85564A1

    公开(公告)日:1986-06-11

    申请号:LU85564

    申请日:1984-10-01

    Applicant: OREAL

    Abstract: The present invention relates to a composition for dyeing keratinic fibres, and human hair in particular, comprising the azo dye of formula: (II) optionally in combination with at least one nitro benzene dye or with at least one aminoanthraquinone dye or with at least one nitro benzene and at least one aminoanthraquinone dye. The azo dye of formula (II) is nonmutagenic, has good solubility properties in the usual dye carriers, and imparts to hair hues which are stable, particularly to washing. The invention also relates to a process for dyeing human hair by direct coloration which comprises applying the dyeing composition defined above onto the hair, leaving it on the hair for 3 to 60 minutes and then rinsing and drying the hair.

    157.
    发明专利
    未知

    公开(公告)号:DE3534885A1

    公开(公告)日:1986-04-10

    申请号:DE3534885

    申请日:1985-09-30

    Applicant: OREAL

    Abstract: The present invention relates to a composition for dyeing keratinic fibres, and human hair in particular, comprising the azo dye of formula: (II) optionally in combination with at least one nitro benzene dye or with at least one aminoanthraquinone dye or with at least one nitro benzene and at least one aminoanthraquinone dye. The azo dye of formula (II) is nonmutagenic, has good solubility properties in the usual dye carriers, and imparts to hair hues which are stable, particularly to washing. The invention also relates to a process for dyeing human hair by direct coloration which comprises applying the dyeing composition defined above onto the hair, leaving it on the hair for 3 to 60 minutes and then rinsing and drying the hair.

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