Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Reexamination Certificate
2001-01-02
2004-02-24
Gupta, Yogendra N. (Department: 1751)
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
C008S406000, C008S409000, C008S410000, C008S412000, C008S426000
Reexamination Certificate
active
06695887
ABSTRACT:
The present invention relates to a composition for oxidation dyeing keratin fibres, in particular human keratin fibres such as hair, comprising, in a cosmetically acceptable dyeing medium, (1) at least one oxidation dye, (2) at least one fatty alcohol comprising more than twenty carbon atoms, (3) optionally comprising at least one fatty alcohol comprising at most twenty carbon atoms, (4) at least one oxyalkylenated nonionic surfactant with an HLB greater than 5, and (5) optionally comprising at least one oxyalkylenated surfactant with an HLB at most equal to 5, provided that (2), (3), (4), and (5) are present in a proportion such that the weight ratio [(4)]/[(2)+(3)+(5)] is at most 1:1.
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 coloured or not coloured which develop their dyeing power in the hair in the presence of oxidizing agents, leading to the formation of coloured compounds. The formation of these coloured compounds results either from oxidative condensation of the “oxidation bases” with themselves, or oxidative condensation of the “oxidation bases” with colour modifying compounds, or “couplers”, which are generally present in the dyeing compositions used in oxidation dyeing and are represented more particularly by meta-phenylenediamines, meta-aminophenols and 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.
A dyeing product should be able to be confined upon application to the hair so that, on the one hand, it does not run over the face or outside the areas which it is desired to dye, and, on the other hand, a uniform and regular coloration may be obtained on the hair as a whole. Compositions comprising oxidation dye(s) prior to combining with an oxidizing agent should also be stable over time, such as, for example, from the rheological point of view.
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.
However, the inventors have observed that the abovementioned systems do not make it possible to obtain intense and chromatic shades of low selectivity and good fastness while offering good stability of the compositions, good ease of application leading to uniform and regular colorations of the hair and a good cosmetic condition to the treated hair. However, it has also been observed that the ready-to-use dyeing compositions containing the oxidation dye(s), and the thickening systems of the prior art do not allow a sufficiently precise application without running or drops 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 fatty alcohol comprising more than twenty carbon atoms, (3) optionally comprising at least one fatty alcohol comprising at most twenty carbon atoms, (4) at least one oxyalkylenated nonionic surfactant with an HLB greater than 5, and (5) optionally comprising at least one oxyalkylenated surfactant with an HLB at most equal to 5, provided that (2), (3), (4), and (5) are present in a proportion such that the weight ratio [(4)]/[(2)+(3)+(5)] is at most 1:1.
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 fatty alcohol comprising more than twenty carbon atoms;
(3) optionally comprising at least one fatty alcohol comprising at most twenty carbon atoms;
(4) at least one oxyalkylenated nonionic surfactant with an HLB greater than 5; and
(5) optionally comprising at least one oxyalkylenated surfactant with an HLB at most equal to 5,
provided that (2), (3), (4), and (5) are present in a proportion such that the weight ratio [(4)]/[(2)+(3)+(5)] is at most 1:1.
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 oxidizing agent (3) at least one fatty alcohol comprising more than twenty carbon atoms, (4) optionally comprising at least one fatty alcohol comprising at most twenty carbon atoms, (5) at least one oxyalkylenated nonionic surfactant with an HLB greater than 5, and (6) optionally comprising at least one oxyalkylenated surfactant with an HLB at most equal to 5, provided that (2), (3), (4), and (5) are present in a proportion such that the weight ratio [(4)]/[(2)+(3)+(5)] is at most 1:1. 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:
(i) applying to said keratin fibers at least one composition (A) comprising, in a dyeing medium, (1) at least one oxidation dye, (2) at least one fatty alcohol comprising more than twenty carbon atoms, (3) optionally comprising at least one fatty alcohol comprising at most twenty carbon atoms, (4) at least one oxyalkylenated nonionic surfactant with an HLB greater than 5, and (5) optionally comprising at least one oxyalkylenated surfactant with an HLB at most equal to 5, provided that (2), (3), (4), and (5) are present in a proportion such that the weight ratio [(4)]/[(2)+(3)+(5)] is at most 1:1, and
(ii) developing a 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.
One embodiment of the invention relates to multicompartment dyeing devices or “kits” for oxidation dy
Cottard François
Rondeau Christine
Elhilo Eisa
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Gupta Yogendra N.
L'Oreal (S.A.)
LandOfFree
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