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    Multi-step hair dyeing process using at least one titanium salt and a synthetic direct dye
    1.
    发明授权
    Multi-step hair dyeing process using at least one titanium salt and a synthetic direct dye 有权

    公开(公告)号：US10716744B2

    公开(公告)日：2020-07-21

    申请号：US15735476

    申请日：2016-06-10

    Applicant: L'OREAL

    Inventor： Boris Lalleman ,  Alain Lagrange

    IPC: A61Q5/10 ,  A61K8/58 ,  A61K8/29 ,  A61K8/365 ,  A61Q5/06 ,  A61K8/22

    Abstract: The present invention relates to a multi-step process for dyeing keratin fibres, human keratin fibres such as the hair, in which said fibres are treated with: i) at least one step i) of treating said fibres using a cosmetic composition Ci) comprising a) one or more titanium salts and b) optionally one or more particular carboxylic acids; ii) at least one step of dyeing with a colouring cosmetic composition Cii) comprising c) one or more synthetic direct dyes, preferably chosen from anionic direct dyes; iii) optionally at least one step of intermediate rinsing of said fibres, said step being performed between step i) and ii) or between step ii) and i), depending on the order in which said steps i) and ii) are performed.

    Oxidation dyeing process using a composition comprising a monoaminobenzene and a metal catalyst
    4.
    发明授权
    Oxidation dyeing process using a composition comprising a monoaminobenzene and a metal catalyst 有权

    公开(公告)号：US10251827B2

    公开(公告)日：2019-04-09

    申请号：US14899653

    申请日：2014-06-23

    Applicant: L'OREAL

    Inventor： Alain Lagrange ,  Boris Lalleman ,  Marie Mignon

    IPC: A61Q5/10 ,  A61K8/41 ,  A61K8/365 ,  A61K8/19 ,  A61K8/22 ,  A61K8/49

    Abstract: The invention relates to a process for dyeing keratin fibers, comprising the use of one or more metal catalysts and of a composition (A) comprising: —one or more oxidizing agents, and —at least one monoaminobenzene of formula (I), or an addition salt or solvate thereof in which the radicals R1 to R5 represent, independently of each other: a hydrogen atom; a halogen atom, a C1-C6 alkyl radical, a C1-C6 alkoxy radical, a carboxylic radical (—COOH), a sulfonic radical (—S03 H); two of the adjacent radicals R1 to R5 possibly forming, with the carbon atoms that bear them, a saturated or unsaturated 5- to 7-membered ring, optionally comprising from 1 to 2 heteroatoms, preferably oxygen, the said ring being optionally fused with a saturated or unsaturated 5- to 6-membered ring; on condition that at least one of the radicals R1 to R5 represents an optionally substituted alkoxy radical and preferably at least one of the other radicals R1 to R5 is a hydrogen atom.

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