Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Reexamination Certificate
2001-01-02
2002-08-20
Gupta, Yogendra N. (Department: 1751)
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
C008S407000, C424S070100, C424S070110
Reexamination Certificate
active
06436151
ABSTRACT:
The present invention relates to cosmetic compositions for oxidation dyeing keratin fibers, such as human keratin fibers like hair, comprising, in a dyeing medium, (1) at least one oxidation dye, (2) at least one thickening polymer comprising at least one fatty chain, and (3) at least one fatty alcohol comprising more than twenty carbon atoms.
It is known to dye keratin fibers, for example human hair, with dyeing compositions comprising oxidation dye precursors, generally called “oxidation bases.” Representative oxidation bases include ortho- and para-phenylenediamines, ortho- and para-aminophenols, and heterocyclic bases.
Oxidation dye precursors are compounds initially only slightly colored or not colored that develop their dyeing power in the hair in the presence of oxidizing agents, leading to the formation of colored compounds. The formation of these colored compounds results either from oxidative condensation of the “oxidation bases” with themselves, or oxidative condensation of the “oxidation bases” with color-modifying compounds, or “couplers,” which are generally present in the dyeing compositions used in oxidation dyeing. Representative couplers include meta-phenylenediamines, meta-aminophenols, meta-diphenols, and certain heterocyclic compounds.
The variety of compositions that can be employed in oxidation coloration, chosen from oxidation bases, oxidation couplers and mixtures of oxidation bases and couplers, can contribute to a pallet very rich in color.
Traditional thickeners, which can provide a gelling effect when diluted by water and/or surfactants, have been used conventionally to localize the dye product as applied on hair, so that the dye product does not touch the face or the area outside the area to be dyed. Such thickeners, chosen as appropriate, for example include crosslinked polyacrylic acid, hydroxyethylcelluloses, certain polyurethanes, waxes or mixtures of nonionic surfactants having an HLB (Hydrophilic Lipophilic Balance).
However, the inventors have observed that the above-mentioned thickening systems may impede a result of intense and chromatic shades of low selectivity and good fastness and a good cosmetic condition to the treated hair. However, it has also been observed that the ready-to-use dyeing compositions comprising known oxidation dye(s) and thickening systems tend to result in imprecise application of such compositions and/or a decrease in viscosity over time.
The inventors have discovered that it is possible to obtain ready-to-use oxidation dyeing compositions that resist running and tend to remain well-confined to the site of application. Additionally, such compositions may favor more intense and more chromatic (radiant) shades, while exhibiting low selectivities and good fastness toward chemical agents (shampoo, permanent waving and the like) and/or natural agents (light, perspiration and the like), and while offering the hair good cosmetic properties. The inventors have discovered that it is possible to obtain at least one of the aforementioned characteristics by formulating a ready-to-use cosmetic dyeing composition comprising (1) at least one oxidation dye, (2) at least one thickening polymer comprising at least one fatty chain, and (3) at least one fatty alcohol comprising more than twenty carbon atoms.
The inventors have also discovered that said cosmetic compositions comprising (1) at least one oxidation dye, (2) at least one thickening polymer comprising at least one fatty chain, and (3) at least one fatty alcohol comprising more than twenty carbon atoms tend to be stable upon storage.
At least one of these discoveries forms the basis of the present invention.
The subject of the present invention is thus a cosmetic composition for oxidation dyeing keratin fibers, such as human keratin fibers like hair, comprising, in a dyeing medium (1) at least one oxidation dye, (2) at least one thickening polymer comprising at least one fatty chain, and (3) at least one fatty alcohol comprising more than twenty carbon atoms.
Another subject of the invention relates to a ready-to-use cosmetic composition for oxidation dyeing keratin fibers comprising, in a dyeing medium, (1) at least one oxidation dye, (2) at least one thickening polymer comprising at least one fatty chain, (3) at least one fatty alcohol comprising more than twenty carbon atoms, and (4) at least one oxidizing agent. The term “ready-to-use composition” is understood to mean, for the purposes of the present invention, a composition intended to be applied immediately to the keratin fibers, either stored as it is before use or obtained from the mixture of two or more compositions.
The invention also relates to a method for oxidation dyeing keratin fibers, such as human keratin fibers like hair, comprising applying to said keratin fibers at least one composition (A) comprising, in a dyeing medium:
at least one oxidation dye,
at least one thickening polymer comprising at least one fatty chain, and
at least one fatty alcohol comprising more than twenty carbon atoms, developing the color with the aid of at least one composition (B) comprising at least one oxidizing agent, wherein said at least one oxidizing composition (B) is combined at the time of use with said at least one composition (A) or said at least one oxidizing composition (B) is applied sequentially to said at least one composition (A) without intermediate rinsing.
A variation of the above-described method is a method for oxidation dyeing keratin fibers, such as human keratin fibers like hair, comprising:
applying to said keratin fibers at least one dyeing composition comprising, in a dyeing medium, at least one oxidation dye and at least one fatty alcohol comprising more than twenty carbon atoms, and optionally comprising at least one thickening polymer comprising at least one fatty chain,
developing the color with the aid of at least one oxidizing composition comprising at least one oxidizing agent and an effective quantity of at least one thickening polymer comprising at least one fatty chain,
wherein said at least one oxidizing composition is combined at the time of use with said at least one dyeing composition or wherein said at least one oxidizing composition is applied sequentially to said at least one dyeing composition without intermediate rinsing.
One embodiment of the invention relates to multicompartment dyeing devices or “kits” for oxidation dyeing keratin fibers, such as human keratin fibers like hair.
A kit according to the invention comprises at least two compartments, wherein:
a first compartment comprises (1) at least one oxidation dye, (2) at least one thickening polymer comprising at least one fatty chain, and (3) at least one fatty alcohol comprising more than twenty carbon atoms, and
a second compartment comprises at least one oxidizing agent.
According to one variant, another kit comprises at least two compartments, wherein:
a first compartment comprises at least one oxidation dye and at least one fatty alcohol comprising more than twenty carbon atoms, and optionally comprises at least one thickening polymer comprising at least one fatty chain and
a second compartment comprises at least one oxidizing agent and an effective quantity of at least one thickening polymer comprising at least one fatty chain.
According to another variant, a three-compartment kit comprises:
a first compartment comprising at least one oxidation dye and at least one fatty alcohol comprising more than twenty carbon atoms, and optionally comprising at least one thickening polymer comprising at least one fatty chain,
a second compartment comprising at least one thickening polymer comprising at least one fatty chain and
a third compartment comprising at least one oxidizing agent and optionally comprising at least one thickening polymer comprising at least one fatty chain.
At least one fatty alcohol comprising more than 20 carbon atoms
The expression fatty alcohols includes, but is not limited to, fatty alcohols chosen from branched and unbranched, saturated and unsaturated fatty alcohols. The expression at least one (as used h
Cottard François
Rondeau Christine
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Gupta Yogendra N.
Koss Ann-Marie
L'Oreal (S.A.)
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