Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Reexamination Certificate
2000-06-27
2003-04-29
Gupta, Yogendra N. (Department: 1751)
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
C008S406000, C008S408000, C008S410000, C008S416000, C008S435000, C008S094240, C008S555000
Reexamination Certificate
active
06554870
ABSTRACT:
The present invention relates to a composition for the oxidation dyeing of keratin fibres and in particular of human keratin fibres, comprising at least one specific para-phenylenediamine which is substituted in the 2-position on the benzene ring, and at least one cationic or amphoteric substantive polymer. The invention also relates to the use of such a composition in cosmetic applications.
It is known to dye keratin fibres, and in particular human hair, with dye compositions containing oxidation dye precursors, in particular ortho- or para-phenylenediamines, ortho- or para-aminophenols, generally referred to as “oxidation bases”, and couplers, also referred to as coloration modifiers, more particularly meta-phenylenediamine, metaminophenols and meta-diphenols, which allow the “foundation” colorations obtained with the products of condensation of the oxidation bases to be modified and enriched with glints.
It is thus especially known to dye hair with dye compositions which contain, as oxidation dye precursors, para-phenylenediamine of the type 1-hydroxyalkyl-2,5-diaminobenzene or alternatively of the type 1-hydroxyalkoxy-2,5-diaminobenzene, these precursors being combined, if required, with one or more common couplers. Such compositions are described, for example, in WO Patent Application 80/00214 and in European Patent EP-B-0,400,330, the disclosures of which are incorporated herein by reference.
However, it appeared to the Inventors that, in order to be even more satisfactory, the above dyes needed to be less selective, that is to say that they needed to be less sensitive, in dyeing terms, to the various degrees of sensitization of the hair to be dyed, in order for the colour range observed on this more or less sensitized hair to be as narrow as possible, and thus in order for the hair to be dyed uniformly. It furthermore appeared important for these compositions to be able to generate dyes whose power, on the one hand, and whose simultaneous resistance to atmospheric agents (light, bad weather), to perspiration and to the various cosmetic treatments to which the hair may be subjected (washing, permanent-waving and the like), on the other hand, is further enhanced.
Now, after considerable research conducted in this matter, it has been discovered that it is possible to obtain oxidation dyes based on compounds of the 1-hydroxyalkyl- or 1-hydroxyalkoxy-2,5-diaminobenzene type, these dyes exhibiting a markedly enhanced selectivity compared with those known hitherto, when a cationic or amphoteric substantive polymer is combined with the above compounds.
It has also been discovered that the dyes obtained using these novel compositions are more intense, while at the same time remaining very resistant to atmospheric agents and to the various above mentioned cosmetic treatments.
These discoveries form the basis of the present invention. The subject of the present invention is thus an oxidation dye composition for keratin fibres, in particular for human keratin fibres such as hair, comprising, in a medium appropriate for dyeing, at least one oxidation dye precursor (oxidation base), and if required, at least one coupler, and at least one cationic or amphoteric substantive coupler; the at least one oxidation dye precursor being selected from para-phenylenediamines of formula (I):
in which m is an integer equal to zero or 1, and n is an integer ranging from 1 to 4, or an acid addition salt thereof.
According to the invention, the oxidation dye precursors of formula (I) above are preferably used in combination with one or more couplers.
The new dyes obtained in the context of the present invention make it possible to achieve intense, fast and uniform colorations from the root to the tip of the hairs.
Another subject of the present invention concerns a ready-to-use composition for dyeing keratin fibres, in particular human keratin fibres such as hair, which contains at least one para-phenylenediamine of formula (I) above, at least one cationic or amphoteric substantive polymer, one or more optional couplers and at least one oxidizing agent.
The invention is also aimed at a process for dyeing keratin fibres, and in particular human keratin fibres such as hair, comprising the steps of: (i) applying to the fibres the dye composition (A1), which comprises, in a medium appropriate for dyeing, at least one para-phenylenediamine of formula (I), as described above, as an oxidation dye precursor, and one or more optional couplers, in combination with at least one cationic or amphoteric substantive polymer; and (ii) using an oxidizing agent, the oxidizing agent being applied to the fibres simultaneously with or subsequently to the dye composition, to develop the colour of the dye composition in an acidic, neutral or alkaline medium. In accordance with this embodiment of the present invention, the oxidizing agent can be mixed with the dye composition (A1) at the time of application of the dye composition to the fibres, or can be separately contained in a composition (B1) that is separately applied to the fibres simultaneously with the dye composition, or is separately applied to the fibres subsequently to the application of the dye composition.
The invention is also aimed at a variant of this process, which comprises the steps of: (i) applying to the fibres a dye composition (A2), which comprises, in a medium appropriate for dyeing, at least one para-phenylenediamine of formula (I), as described above; and (ii) applying an oxidizing composition (B2), which comprises an oxidizing agent and at least one cationic or amphoteric substantive polymer, to the fibres simultaneously with or subsequently to the dye composition, to develop the colour of the dye composition in an alkaline, neutral or acidic medium. In accordance with this embodiment of the present invention, the dye composition may further comprise at least one coupler and/or a cationic or amphoteric substantive polymer. Also in accordance with this embodiment of the present invention, the oxidizing composition (B2) can be added to the dye composition (A2) at the time of the application of the dye composition to the fibres or can be separately applied to the fibres simultaneously with or subsequently to the dye composition.
A further subject of the present invention is multi-compartment dyeing devices or “kits”, a first compartment of which contains a dye composition comprising at least one para-phenylenediamine of formula (I), as described above, as an oxidation dye precursor, one or more optional couplers and at least one cationic or amphoteric substantive polymer, and a second compartment of which contains an oxidizing agent.
According to another variant, a further subject of the invention is multi-compartment dyeing devices or “kits”, a first compartment of which contains a dye composition comprising at least one para-phenylenediamine of formula (I), as described above, as an oxidation dye precursor, and one or more optional couplers, in the presence or absence of a cationic or amphoteric substantive polymer, and a second compartment of which contains an oxidizing composition which comprises an oxidizing agent and at least one cationic or amphoteric substantive polymer.
However, other characteristics, aspects, objectives and advantages of the invention will emerge even more clearly upon reading the description and the examples which follow.
The para-phenylenediamine acid salts of formula (I) which may be used according to the invention are preferably chosen from the hydrochlorides, the sulphates, the hydrobromides and the tartrates.
Among the oxidation dye precursors of formula (I) which may be used in the context of the present invention, it is preferred to use 2-(&bgr;-hydroxyethyl)-para-phenylenediamine and 2-(&bgr;-hydroxyethyloxy)-para-phenylenediamine.
The concentration of this (these) precursor(s) or of the salts thereof may preferably range approximately from 0.05 to 10% by weight relative to the total weight of the dye composition applied to the hair, and more preferably range approximately from 0.1 to 5% by weight.
As defined he
Audousset Marie-Pascale
Cotteret Jean
Elhilo Eisa
Gupta Yogendra N.
L'Oreal
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