Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Reexamination Certificate
2002-08-07
2004-10-05
Mruk, Brian P. (Department: 1751)
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
C008S406000, C008S410000, C008S411000, C008S412000, C008S421000, C008S552000, C008S602000, C008S606000, C524S590000, C525S406000
Reexamination Certificate
active
06800098
ABSTRACT:
The present invention relates to a composition for the oxidation dyeing of keratin fibers, and in particular of human keratin fibers such as the hair, comprising at least one oxidation dye and at least one thickening polymer with an aminoplast-ether skeleton.
It is known practice to dye keratin fibers, and in particular human hair, with dye compositions containing oxidation dye precursors, generally known as “oxidation bases”, in particular ortho- or para-phenylenediamines, ortho- or para-aminophenols, and heterocyclic bases.
Oxidation dye precursors are compounds that are initially uncolored or only weakly colored, which develop their dyeing power on the hair in the presence of oxidizing agents, leading to the formation of colored compounds. The formation of these colored compounds results either from an oxidative condensation of the “oxidation bases” with themselves, or from an oxidative condensation of the “oxidation bases” with coloration modifiers, or “couplers”, which are generally present in the dye 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 molecules used, which consist firstly of the “oxidation bases” and secondly of the “couplers”, makes it possible to obtain a very wide range of colors.
To localize the oxidation dye product on application to the hair so that it does not run down the face or beyond the areas which it is proposed to dye, use has been made hitherto of conventional thickeners such as crosslinked polyacrylic acid, hydroxyethylcelluloses, certain polyurethanes, waxes or mixtures of nonionic surfactants with an HLB (Hydrophilic-Lipophilic Balance) value, which, when suitably chosen, give rise to the gelling effect when they are diluted with water and/or surfactants.
However, the Applicant has found that the thickening systems mentioned above do not make it possible to obtain intense and chromatic shades of low selectivity and good staying power, while at the same time leaving the treated hair in a good cosmetic condition. Moreover, the Applicant has also found that ready-to-use dye compositions containing the oxidation dye(s) and the thickener systems of the prior art do not allow a sufficiently precise application without running or falls in viscosity over time.
However, after considerable research conducted in this matter, the Applicant has now discovered that it is possible to obtain ready-to-use oxidation dye compositions that do not run and thus remain satisfactorily localized at the point of application, and that also make it possible to obtain powerful and chromatic (luminous) shades with low selectivity and good staying power with respect to chemical agents (shampoos, permanent-waving agents, etc.) or natural agents (light, perspiration, etc.) while at the same time giving the hair good cosmetic properties, if an effective amount of a polymer with an aminoplast-ether skeleton is introduced (i) either into the composition containing the oxidation dye(s) and optionally the coupler(s) [or composition A], or (ii) into the oxidizing composition [or composition B], or (iii) into both compositions at the same time.
These discoveries form the basis of the present invention.
One subject of the present invention is thus a composition for the oxidation dyeing of keratin fibers, in particular of human keratin fibers such as the hair, comprising, in a medium that is suitable for dyeing, at least one oxidation dye, which is characterized in that it also contains at least one polymer with an aminoplast-ether skeleton.
Another subject of the invention relates to a ready-to-use composition for dyeing keratin fibers, which contains at least one oxidation dye and at least one polymer with an aminoplast-ether skeleton and an oxidizing agent.
For the purposes of the invention, the expression “ready-to-use composition” means any composition intended to be applied immediately to keratin fibers.
The invention is also directed toward a process for dyeing keratin fibers, and in particular human keratin fibers such as the hair, which consists in applying to the fibers at least one composition A containing, in a medium that is suitable for dyeing, at least one oxidation dye, the color being developed at alkaline, neutral or acidic pH with the aid of a composition B containing at least one oxidizing agent that is mixed only at the time of use with composition A, or that is applied sequentially without intermediate rinsing, at least one polymer with an aminoplast-ether skeleton being present in composition A or in composition B or in each of the compositions A and B.
A subject of the invention is also dyeing devices or multi-compartment “kits”.
A two-compartment device according to the invention comprises a compartment that contains a composition Al containing, in a medium that is suitable for dyeing, at least one oxidation dye, and another compartment that contains a composition B1 containing, in a medium that is suitable for dyeing, an oxidizing agent, the polymer with an aminoplast-ether skeleton being present in the composition A1 or the composition B1, or in each of the compositions A1 and B1.
Another device, containing 3 compartments according to the invention, comprises a first compartment that contains a composition A2 containing, in a medium that is suitable for dyeing, at least one oxidation dye, a second compartment that contains a composition B2 containing, in a medium that is suitable for dyeing, at least one oxidizing agent, and a third compartment that contains a composition C containing, in a medium that is suitable for dyeing, at least one polymer with an aminoplast-ether skeleton, composition A2 and/or composition B2 also possibly containing a polymer with an aminoplast-ether skeleton.
However, other characteristics, aspects, subjects and advantages of the invention will emerge even more clearly on reading the description and the examples that follow.
For the purposes of the present invention, the term “aminoplast-ether” means any product derived from the condensation of an aldehyde with an amine or an amide.
For the purposes of the present invention, the term “aminoplast-ether” also means any structural unit formed from an aminoplast residue and a divalent hydrocarbon-based residue linked to the aminoplast residue via an ether bond.
The polymers with an aminoplast-ether skeleton that are used according to the invention are preferably chosen from those containing at least one unit of structure (I) below:
in which:
AMP is an aminoplast residue with alkylene units,
R denotes a hydrogen atom, a C
1
-C
4
alkyl radical or a C
1
-C
4
acyl radical,
R
01
is a divalent alkyleneoxy residue,
p denotes a positive integer, the group(s) OR being linked to the alkylene units of the AMP residue.
Preferably, the polymers with an aminoplast-ether skeleton are chosen from those containing at least one unit of structure (II) below:
in which:
AMP, R, R
01
and p have the same meaning as above,
R
02
is a hydrophobic group other than RO linked to AMP via a hetero atom and comprising at least two carbon atoms, and
q is a positive integer.
Even more preferably, the polymers of the invention are of formulae (III) and (IIIa) below:
in which:
AMP, R, R
01
, R
02
, p and q have the same meaning as above, R2 or R3, which may be identical or different, represent an end group that can denote a hydrogen atom, a group R
01
H, a group R
02
H, a group AMP(OR)p or any monofunctional group such as alkyl, cycloalkyl, aryl, aralkyl, alkylaryl, alkyloxyalkyl, aryloxyalkyl or cycloalkoxyalkyl, a being a number greater than 1 and preferably greater than 2.
The aminoplast residues bearing the groups OR thereof integrated into the polymers of the invention may be chosen, in a nonlimiting manner, from structures (IV) to (XV) below:
in which:
R has the same meaning as above,
R1 denotes C
1
-C
4
alkyl,
y is a number at least equal to 2,
x denotes 0 or 1.
Preferably, the aminoplast residue(s) bearing the groups OR thereof is (are) c
Allard Delphine
Legrand Frédéric
Elhilo Eisa
Finnegan Henderson Farabow Garrett & Dunner LLP
L'Oreal (S.A.)
Mruk Brian P.
LandOfFree
Oxidation dye composition for keratinic fibres containing a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oxidation dye composition for keratinic fibres containing a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oxidation dye composition for keratinic fibres containing a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3275116