Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
1997-12-30
2001-01-23
Harrison, Robert H. (Department: 1617)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S047000, C424S070100, C424S070200, C424S070600, C424S070120, C424S078020, C514S844000, C514S944000
Reexamination Certificate
active
06177090
ABSTRACT:
The present invention relates to a cosmetic or dermatological composition for treating keratin substances, in particular the hair, comprising at least one grafted silicone polymer containing a polysiloxane skeleton grafted with non-silicone organic monomers, and at least one silicone chosen from silicones containing at least one quaternized or non-quaternized amine function, silicone resins and silicone gums.
Polymers containing a polysiloxane skeleton grafted with non-silicone organic monomers are known in the prior art and are preferably chosen from those described in patent applications EP-A-0,582,152 and WO 93/23009. They are used in particular in hair compositions for their styling properties.
The Applicant has discovered, surprisingly, that by combining at least one silicone polymer containing a polysiloxane skeleton grafted with non-silicone organic monomers, with at least one silicone gum and/or a silicone resin and/or a silicone containing at least one quaternized or non-quaternized amine function, an improvement in the volume and in the body of the hairstyle is obtained while at the same time having better styling and/or holding properties such as the fixing power. The hair is “lighter” and styles easily.
The feel and softness properties of the hair are also improved.
The term fixing power of the composition will be understood to denote the ability of this composition to give the hair cohesion such that the initial shape of the hairstyle is held.
The composition according to the invention is thus essentially characterized in that it comprises, in a cosmetically or dermatologically acceptable medium, at least one grafted silicone polymer containing a polysiloxane skeleton grafted with non-silicone organic monomers, and at least one silicone chosen from silicones containing at least one quaternized or non-quaternized amine function, silicone resins and silicone gums.
In the following text, in accordance with what is generally accepted, the term silicone polymer is understood to denote any organosilicon polymer or oligomer having a linear or cyclic, branched or crosslinked structure, of variable molecular weight, obtained by polymerization and/or polycondensation of suitably functionalized silanes, and consisting essentially of a repetition of main units in which the silicon atoms are linked together by oxygen atoms (siloxane bonding ≡Si—O—Si≡), optionally substituted hydrocarbon radicals being linked directly via a carbon atom to the said silicon atoms. The most common hydrocarbon radicals are alkyl radicals, especially C
1
-C
10
alkyl radicals, and in particular methyl, fluoroalkyl radicals, aryl radicals and in particular phenyl, and alkenyl radicals and in particular vinyl; other types of radicals which can be linked, either directly or via a hydrocarbon radical, to the siloxane chain are, especially, hydrogen, halogens and in particular chlorine, bromine or fluorine, thiols, alkoxy radicals, polyoxyalkylene (or polyether) radicals and in particular polyoxyethylene and/or polyoxypropylene, hydroxyl or hydroxyalkyl radicals, substituted or unsubstituted amine groups, amide groups, acyloxy radicals or acyloxyalkyl radicals, hydroxyalkylamino or aminoalkyl radicals, quaternary ammonium groups, amphoteric or betaine groups, anionic groups such as carboxylates, thioglycolates, sulphosuccinates, thiosulphates, phosphates and sulphates, needless to say this list not being limiting in any way (so-called “organomodified” silicones).
According to the present invention, the grafted silicone polymer(s) which must be used are those which comprise a silicone (or polysiloxane (≡Si—O—)
n
) main chain on which is grafted, inside the said chain as well as, optionally, on at least one of its ends, at least one organic group containing no silicone.
These silicone polymers can be existing commercial products or alternatively can be obtained according to any means known to those skilled in the art, in particular by reaction between (i) a starting silicone which is correctly functionalized on one or more of these silicon atoms, and (ii) a non-silicone organic compound which is itself correctly functionalized with a function which is capable of reacting with the functional group(s) borne by the said silicone, forming a covalent bond; a classic example of such a reaction is the hydrosilylation reaction between ≡Si—H groups and vinyl groups CH
2
═CH—, or alternatively the reaction between thio-functional groups -SH with these same vinyl groups.
Examples of silicone polymers which are suitable for carrying out the present invention, as well as their specific mode of preparation, are described in particular in patent applications EP-A-0,582,152, WO 93/23009 and WO 95/03776, the teachings of which are included in their entirety in the present description by way of non-limiting references.
According to a particularly preferred embodiment of the present invention, the silicone polymer used comprises the result of the radical copolymerization between, on the one hand, at least one non-silicone anionic organic monomer having ethylenic unsaturation and/or a non-silicone hydrophobic organic monomer having ethylenic unsaturation, and, on the other hand, a silicone having in its chain at least one functional group capable of reacting with the said ethylenic unsaturations of the said non-silicone monomers, forming a covalent bond, in particular thio-functional groups.
According to the present invention, the said anionic monomers containing ethylenic unsaturation are preferably chosen, alone or as a mixture, from linear or branched, unsaturated carboxylic acids, optionally partially or totally neutralized in the form of a salt, it being possible for this (these) carboxylic acid(s) to be, more particularly, acrylic acid, methacrylic acid, maleic acid, maleic anhydride, itaconic acid, fumaric acid and crotonic acid. The suitable salts are, in particular, alkali metal salts, alkaline-earth metal salts and ammonium salts. It will likewise be noted that, in the final grafted silicone polymer, the organic group of anionic nature which comprises the result of the radical (homo)polymerization of at least one anionic monomer of unsaturated carboxylic acid type can, after reaction, be post-neutralized with a base (sodium hydroxide, aqueous ammonia, etc) in order to bring it into the form of a salt.
According to the present invention, the hydrophobic monomers containing ethylenic unsaturation are preferably chosen, alone or as a mixture, from acrylic acid esters of alkanols and/or methacrylic acid esters of alkanols. The alkanols are preferably C
1
—C
8
and more particularly C
1
—C
12
alkanols. The preferred monomers are chosen from the group consisting of isooctyl (meth)acrylate, isononyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, lauryl (meth)acrylate, isopentyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, methyl (meth)acrylate, tert-butyl (meth)acrylate, tridecyl (meth)acrylate and stearyl (meth)acrylate, or mixtures thereof.
One family of grafted silicone polymers which is particularly suitable for carrying out the present invention consists of silicone polymers containing in their structure the unit of formula (I) below:
in which the radicals G
1
, which may be identical or different, represent hydrogen or a C
1
—C
10
alkyl radical or alternatively a phenyl radical; the radicals G
2
, which may be identical or different, represent a C
1
—C
10
alkylene group; G
3
represents a polymer residue resulting from the (homo)polymerization of at least one anionic monomer containing ethylenic unsaturation; G
4
represents a polymer residue resulting from the (homo)polymerization of at least one hydrophobic monomer containing ethylenic unsaturation; m and n are equal to 0 or 1; a is an integer ranging from 0 to 50; b is an integer which may be between 10 and 350, c is an integer ranging from 0 to 50; with the proviso that one of the parameters a and c is other than 0.
Preferably, the unit of formula (I) above has at least one, and even more preferably all, of the
Cauwet-Martin Daniele
Dubief Claude
Dupuis Christine
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Harrison Robert H.
L'Oreal
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