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    Process for dyeing or lightening keratin fibres in two parts, using an oil-rich alkaline direct emulsion based on a solid nonionic surfactant with an HLB ranging from 1.5 to 10
    3.
    发明授权
    Process for dyeing or lightening keratin fibres in two parts, using an oil-rich alkaline direct emulsion based on a solid nonionic surfactant with an HLB ranging from 1.5 to 10 有权

    公开(公告)号：US10130568B2

    公开(公告)日：2018-11-20

    申请号：US14628339

    申请日：2015-02-23

    Applicant: L'OREAL

    Inventor： Philippe Rapold ,  Gautier Deconinck ,  Caroline Goget ,  Luc Nicolas-Morgantini ,  Frédéric Simonet ,  Sophie Bouxirot

    IPC: A61Q5/10 ,  A61K8/06 ,  A61K8/41 ,  A61K8/31 ,  A61K8/39 ,  A61K8/60 ,  A61K8/86 ,  A61Q5/08

    Abstract: The present invention relates to a process for dyeing or lightening keratin fibres, comprising the step of extemporaneously mixing at the time of use two compositions (A) and (B) and of applying the said mixture to the said fibres; the said mixture comprising at least 25% by weight of fatty substances relative to the total weight of the composition obtained from the mixing of two compositions (A)+(B); with: —(A) representing a composition in direct emulsion form whose content of oil(s) ii) is at least 30% by weight relative to the weight of composition (A), and comprising: i) at least one nonionic surfactant that is solid at room temperature and at atmospheric pressure, with an HLB ranging from 1.5 to 10; ii) at least one basifying agent; Hi) optionally at least one additional surfactant other than the solid nonionic surfactants (i), iv) optionally at least one dye; and—(B) representing a composition comprising at least one chemical oxidizing agent. A subject of the present invention is also a multi-compartment device and a composition (A) in direct emulsion form and the ready-to-use composition resulting from the mixing of compositions (A) and (B). The process according to the invention makes it possible to dye keratin fibres in a powerful, intense and/or homogeneous manner while at the same time being easy to prepare and to apply, since the mixture in the form of an oil-rich emulsion does not run, but remains localized at the point of application. The process of the invention also makes it possible to lighten keratin fibres in a noteworthy manner.

    Process for treating keratin fibers using a halochromic triarylmethane direct dye, an alkaline revealer and then an acidic eraser
    5.
    发明授权
    Process for treating keratin fibers using a halochromic triarylmethane direct dye, an alkaline revealer and then an acidic eraser 有权

    公开(公告)号：US11273112B2

    公开(公告)日：2022-03-15

    申请号：US16955027

    申请日：2018-12-18

    Applicant: L'OREAL

    Inventor： Arnaud Bonnamy ,  Frédéric Simonet ,  Maxime Pourret

    IPC: A61Q5/10 ,  A61K8/49 ,  A61K8/46

    Abstract: The present invention relates to a process for treating keratin fibers, especially human keratin fibers such as the hair, using i) at least one triarylmethane or sulfonophthalein direct dye of formula (I) or (I′) as defined below, ii) an alkaline revealer, iii) an eraser at acidic pH. A subject of the invention is also a composition comprising at least one triarylmethane direct dye of formula (I) or (I′) as defined below and at least one thickener and/or at least one hydrotropic solvent, and a multi-compartment kit comprising i), ii) and iii) in three separate compartments. The present invention makes it possible in particular to obtain keratin fiber coloring with intense and persistent tints which can be modified, erased and reformed several times without any loss of color.

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