Bleaching and dyeing; fluid treatment and chemical modification – Using enzymes – dye process – composition – or product of dyeing
Reexamination Certificate
2002-08-28
2004-10-05
Mruk, Brian P. (Department: 1751)
Bleaching and dyeing; fluid treatment and chemical modification
Using enzymes, dye process, composition, or product of dyeing
C008S552000, C008S602000, C008S606000, C008S101000, C008S107000, C008S111000, C524S590000, C525S406000
Reexamination Certificate
active
06800096
ABSTRACT:
The present invention relates to a composition for bleaching keratin fibers, and in particular human keratin fibers such as the hair, comprising at least one oxidizing agent and at least one thickening polymer with an aminoplast-ether skeleton.
It is known practice to bleach keratin fibers, and in particular human hair, with bleaching compositions containing one or more oxidizing agents. Among the oxidizing agents conventionally used, mention may be made of hydrogen peroxide or compounds capable of producing hydrogen peroxide by hydrolysis, such as urea peroxide or persalts, for instance perborates, percarbonates and persulfates, hydrogen peroxide and persulfates being particularly preferred.
Said bleaching compositions are mainly in the form of anhydrous products (powders or creams) containing alkaline compounds (amines and alkali metal silicates) and a peroxygenated reagent such as ammonium or alkali metal persulfates, perborates or percarbonates, which are diluted at the time of use with an aqueous hydrogen peroxide composition. The bleaching compositions may also result from the mixing, at the time of use, of the anhydrous powder of peroxygenated reagent with an aqueous composition. containing the alkaline compounds and another aqueous composition containing hydrogen peroxide.
The bleaching compositions are also in the form of thickened aqueous hydrogen peroxide compositions, ready for use.
For the purposes of the invention, the term “ready-to-use composition” is understood as meaning the composition intended to be applied in unmodified form to keratin fibers, that is to say that said composition can be stored in unmodified form before use or result from the extemporaneous mixing of two or more compositions.
To localize the bleaching product on application to the hair so that it does not run down the face or beyond the areas which it is proposed to bleach, use has been made hitherto of conventional thickeners such as crosslinked polyacrylic acid, hydroxyethylcelluloses, certain polyurethanes, waxes and also, in the case of aqueous bleaching compositions, 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 bleaching results that are sufficiently powerful and homogeneous, and leave the hair coarse. Moreover, the Applicant has also found that ready-to-use bleaching compositions containing the oxidizing agent(s) and also 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 bleaching 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 homogeneous bleaching results while at the same time leaving the hair less coarse, if an effective amount of a polymer with an aminoplast-ether skeleton is introduced into the composition.
These discoveries form the basis of the present invention.
One subject of the present invention is thus a ready-to-use composition for bleaching keratin fibers, in particular human keratin fibers such as the hair, comprising, in a medium that is suitable for bleaching, at least one oxidizing agent, which is characterized in that it also contains at least one polymer with an aminoplast-ether skeleton.
According to the invention, said composition is anhydrous or aqueous.
When the ready-to-use composition according to the invention results from the mixing, extemporaneously, of several compositions, the polymer containing an aminoplast-ether skeleton may be present in one or more or in all of the mixed compositions.
As a result, the polymer containing an aminoplast-ether skeleton may be present in an anhydrous composition in the form of a powder, preferably a pulverulent powder, or in the form of a cream and/or in one or more aqueous compositions.
Preferably, according to the invention, the polymer containing an aminoplast-ether skeleton is present in at least one aqueous composition that is mixed, at the time of use, with an anhydrous composition in the form of a powder or cream containing at least one oxidizing agent.
Even more preferably, one of these aqueous compositions mixed with the anhydrous composition contains hydrogen peroxide.
The invention is also directed toward a process for bleaching keratin fibers, and in particular human keratin fibers such as the hair, which uses the ready-to-use bleaching composition as described according to the invention.
The invention is also directed toward bleaching devices or wrapping “kits” containing such a ready-to-use composition.
Thus, a two-compartment device comprises a first compartment containing at least one powder or one anhydrous cream or an aqueous composition, and the second compartment contains an aqueous composition, at least one of the two compartments containing at least one oxidizing agent and at least one of the two compartments containing at least one polymer with an aminoplast-ether skeleton.
Another multicompartment “kit” may consist of a first compartment containing a powder or an anhydrous cream and two other compartments each containing an aqueous composition, at least one of the three compartments containing at least one oxidizing agent and at least one of the three compartments containing at least one 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,
RO
1
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, RO
1
and p have the same meaning as above,
RO
2
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, RO
1
, RO
2
, 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 RO
1
H, a group RO
2
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) chosen from those of structure (XVI) below:
in which R, p and x have the same meanings as above.
The divalent alkyleneoxy residues are preferably those corresponding to the diols
Allard Delphine
Legrand Frédéric
Elhilo Eisa
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
L'Oreal (S.A.)
Mruk Brian P.
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