Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Reexamination Certificate
2000-09-25
2004-05-04
Einsmann, Margaret (Department: 1751)
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
C008S405000, C008S406000, C008S407000, C008S409000, C008S410000, C008S411000
Reexamination Certificate
active
06730133
ABSTRACT:
The present invention relates to compositions, particularly ready-to-use compositions, for oxidation dyeing of at least one keratinous fibre, and in particular human keratinous fibres such as the hair, comprising, in a medium suitable for at least one keratinous fibre, (a) at least one oxidation dye and (b) at least one enzymatic system comprising (i) at least one enzyme immobilized in at least one matrix of material obtained via a sol-gel route (i.e., a sol-gel matrix) and optionally (ii) at least one suitable donor, wherein said at least one enzyme is chosen from 2-electron oxidoreductases, 4-electron oxidoreductases and peroxidases, such that when said at least one enzyme is chosen from 2-electron oxidoreductases, said at least one enzymatic system comprises at least one suitable donor, and when said at least one enzyme is chosen from peroxidases, said at least one enzymatic system further comprises at least one source of hydrogen peroxide chosen from hydrogen peroxide and at least one enzymatic system which generates hydrogen peroxide in situ. The present invention is also directed to processes using at least one inventive composition.
Dye compositions comprising oxidation dye precursors are known in the art for dyeing keratinous fibres, in particular human hair. These oxidation dye precursors include ortho-phenylenediamines, para-phenylenediamines, ortho-aminophenols, para-aminophenols and heterocyclic bases. These are generally known as oxidation bases. The oxidation dye precursors, or oxidation bases, are generally colorless or weakly colored compounds which may give rise to colored compounds and dyes when combined with oxidizing products via oxidative condensation.
The shades obtained with these oxidation bases may be varied by combining them with couplers or coloration modifiers. Such coloration modifiers may, for example, be chosen from aromatic meta-diamines, aromatic meta-aminophenols, aromatic meta-diphenols and certain heterocyclic compounds. The variety of oxidation bases and couplers may allow a wide range of colours to be obtained.
The so-called “permanent” coloration obtained from using these oxidation dyes should have at least one of the following desirable characteristics. The coloration should have no toxicological drawbacks, the shades obtained should have the desired intensity, and the coloration should have good resistance to external agents to which the fibres may be subjected such as light, bad weather, washing, permanent-waving, perspiration and rubbing. The dyes should allow coverage of grey hair and should be as unselective as possible, that is, they should allow only the smallest possible differences in coloration along the same keratinous fibre which may be differently sensitized (i.e. damaged) between its tip and its root.
The oxidation dyeing of at least one keratinous fibre is generally carried out in an alkaline medium in the presence of hydrogen peroxide. However, the use of alkaline media in the presence of appreciable amounts of hydrogen peroxide may result in the drawback of substantial degradation of the fibres, as well as appreciable decolorization of the keratinous fibres.
The oxidation dyeing of keratinous fibres may also be carried out using oxidizing systems other than hydrogen peroxide, such as enzymatic systems. In patent application EP-A-0 310 675, the disclosure of which is incorporated by reference, it has been proposed to dye keratinous fibres using compositions comprising an oxidation base and optionally a coupler, in combination with enzymes of the 2-electron oxidoreductase type, such as pyranose oxidase, glucose oxidase and uricase, in the presence of a donor for said enzymes. In patent applications FR-A-2 112 549, FR-A-2 694 018, EP-A-504 005, WO 95/07988, WO 95/33836, WO 95/33837, WO 96/00290, WO 97/19998, WO 97/19999, and U.S. Pat. No. 3,251,742, the disclosures of which are incorporated by reference, it has been proposed to dye keratinous fibres using compositions comprising an oxidation dye precursor and an enzyme of laccase type (4-electron oxidoreductase). Finally, it has also been proposed to dye keratinous fibres using peroxidase in the presence of small amounts of hydrogen peroxide, as has been described in patents EP-548 620, BE-775 110 and U.S. Pat. No. 3,893,803, the disclosures of which are incorporated by reference.
Although these dyeing processes are carried out under conditions which may not result in the degradation of the keratinous fibres to the same extent as the degradation caused by dyeing keratinous fibres in the presence of appreciable amounts of hydrogen peroxide, they nonetheless may lead to colorations that are not entirely satisfactory, since interactions may exist between the dye or the various constituents of the dye support and the solvents and thickeners and/or the enzymes. These interactions may reduce the efficacy of the enzymes for dyeing the keratinous fibres. Further, another potential drawback of these dye formulations is the fact the type of enzyme used may not be sufficiently thermally stable for such dye formulations.
The inventors have discovered that when at least one oxidation dye is combined with at least one enzymatic system comprising at least one enzyme immobilized in at least one sol-gel matrix and optionally at least one suitable donor, wherein said at least one enzyme is chosen from 2-electron oxidoreductases, 4-electron oxidoreductases and peroxidases, it is possible to obtain novel powerful dyes which may display at least one of the desired qualities expressed above.
By virtue of the present invention, it may be possible to reduce the amount of enzyme used, to reduce or even prevent the interactions between the dye or the constituents of the support for the dye composition with the enzyme and it may also be possible to improve the heat stability of dye compositions comprising at least one of the aforementioned enzymes.
Specifically, one subject of the present invention is a composition for the oxidation dyeing of at least one keratinous fibre comprising, in a medium suitable for oxidation dyeing:
(a) at least one oxidation dye; and
(b) at least one enzymatic system comprising (i) at least one enzyme immobilized in at least one sol-gel matrix and optionally (ii) at least one suitable donor, wherein said at least one enzyme is chosen from:
(i) 2-electron oxidoreductases;
(ii) 4-electron oxidoreductases; and
(iii) peroxidases;
such that when said at least one enzyme is chosen from 2-electron oxidoreductases, said at least one enzymatic system comprises at least one suitable donor, and when said at least one enzyme is chosen from peroxidases, said at least one enzymatic system further comprises at least one source of hydrogen peroxide chosen from hydrogen peroxide and at least one enzymatic system which generates hydrogen peroxide in situ, in a medium suitable for the oxidation dyeing. In one embodiment of the present invention, said composition is a ready-to-use composition. The present invention is also directed to processes for the oxidation dyeing of keratinous fibres using the inventive compositions.
As used herein, “donor” refers to the various substrates required for the corresponding enzyme to function. As used herein, “ready-to-use composition” means a composition which is intended to be applied immediately to said at least one keratinous fibre in the presence of air.
Another subject of the present invention are compositions for the oxidation dyeing of keratinous fibres comprising, in a medium suitable for at least one keratinous fibre, (a) at least one oxidation dye and (b) at least one enzymatic system comprising (i) at least one enzyme and optionally (ii) at least one suitable donor, wherein said at least one enzyme is chosen from (i) 2-electron oxidoreductases, (ii) 4-electron oxidoreductases and (iii) peroxidases, wherein said at least one oxidation dye and said at least one enzymatic system are immobilized in at least one sol-gel matrix, such that when said at least one enzyme is chosen from 2-electron oxidoreductases, said at least one enzymatic system compr
Lagrange Alain
Plos Grégory
Einsmann Margaret
Elhilo Eisa
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
L'Oreal (S.A.)
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