Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions
Reexamination Certificate
1999-07-14
2003-07-15
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
C424S401000, C424S070400, C424S070110, C424S070120, C424S070160, C424S070220
Reexamination Certificate
active
06592854
ABSTRACT:
The present invention relates to a cosmetic composition for treating keratin fibres, in particular the hair, comprising at least one anionic or nonionic polymer and at least one silicone comprising at least one carboxylic acid function, as well as to the process for treating keratin fibres using this composition.
Compositions for holding or shaping the hair containing styling polymers (fixing polymers) in their formulation generally have the drawback of making the hair difficult to disentangle, restyle or blow-wave, in particular during brushing. Hair treated with these fixing polymers is generally coarse and has an unnatural feel.
The combination of silicone derivatives with fixing polymers is known in cosmetic compositions for holding and/or fixing the hairstyle. It has been found that these silicone derivatives can improve the disentangling, softness and sheen properties of hair treated with these compositions. However, silicone derivatives are not favourable to the styling properties of compositions containing fixing polymers and the disentangling and softness properties are still not satisfactory.
The aim of the present invention is thus to propose compositions for fixing and/or shaping the hairstyle, these compositions needing to have good properties of fixing and/or hold over time and needing to provide excellent cosmetic properties such as softness, disentangling and feel.
Hair compositions containing a cationic polymer and a polydimethylsiloxane containing carboxylic functionality are known from document EP-A-0,219,830. However, the addition of the polydimethylsiloxane does not improve the softness properties of hair treated with a cationic polymer.
The Applicant has now discovered, surprisingly, that by using compositions containing an anionic or nonionic polymer in combination with at least one silicone comprising at least one carboxylic acid function in a cosmetically acceptable medium, excellent cosmetic properties such as softness, disentangling and feel are obtained while at the same time obtaining excellent styling and/or fixing properties.
A subject of the present invention is thus a cosmetic composition, in particular for keratin fibres, comprising, in a cosmetically acceptable medium, at least one anionic or nonionic polymer and at least one silicone comprising at least one carboxylic acid function.
In the context of the present application, the expression “cosmetic compositions for holding the hairstyle” means any composition whose function is to temporarily fix the shape of the hairstyle, such as, for example, styling lacquers and sprays and styling gels and mousses. The expression “fixing power of the composition” denotes the ability of this composition to give the hair cohesion such that the initial shaping of the hairstyle is maintained. The term “fixing polymer” means any polymer whose function is to fix the shape of the hairstyle.
According to the present invention, the term “keratin fibres” is intended to refer to the hair, the eyelashes and the eyebrows, and more particularly the hair.
According to the present invention, the term “carboxylic acid group” is intended to refer to the free acid form, the form neutralized with a base, and mixtures thereof. According to the invention, the carboxylic acid group does not result from the polymerization of one or more anionic monomers containing ethylenic unsaturation.
In all of the text hereinabove and hereinbelow, in accordance with what is generally accepted, the term “silicone” is intended to denote any organosilicon polymer or oligomer with 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-based radicals being linked directly via a carbon atom to the said silicon atoms. The most common hydrocarbon-based radicals are alkyl radicals, especially C
1
-C
10
alkyl radicals and in particular methyl, fluoroalkyl radicals, and aryl radicals and in particular phenyl.
The silicone comprising at least one carboxylic acid group can be an organopolysiloxane comprising at least one unit:
in which R
1
and R
3
independently denote a linear or branched alkylene radical containing from 2 to 20 carbon atoms and R
2
denotes a linear or branched alkylene radical containing from 1 to 50 carbon atoms which can comprise a hydroxyl group,
a represents 0 or 1, b is a number ranging from 0 to 200 and M denotes hydrogen, an alkali metal or alkaline-earth metal, NH
4
or a quaternary ammonium group such as a mono-, di-, tri- or tetra(C
1
-C
4
alkylammonium) group,
R
1
and R
3
can denote, for example, ethylene, propylene or butylene.
It is possible to use, for example, the organopolysiloxanes containing carboxylic groups, of formula (II):
in which the radicals R
4
are identical to or different from each other and are chosen from a linear or branched C
1
-C
22
alkyl radical, a C
1
-C
22
alkoxy radical and a phenyl radical,
the radicals R
5
, R
6
and R
7
are identical to or different from each other and are chosen from a linear or branched C
1
-C
22
alkyl radical, a C
1
-C
22
alkoxy radical, a phenyl radical and a radical —(R
1
O)
a
—R
2
—(OR
3
)
b
—COOM, at least one of the radicals R
5
, R
6
and R
7
being a radical —(R
1
O)
a
—R
2
—(OR
3
)
b
—COOM,
the radicals R
1
, R
2
, R
3
, a, b and M having the same meaning as above,
c and d are integers from 0 to 1000, the sum c+d preferably ranging from 2 to 1000.
Among the silicones of formula (II), the preferred ones are the compounds of formula (III) below:
in which X is a radical —(R
1
O)
a
—R
2
—(OR
3
)
b
—COOM, the radicals R
1
, R2, R
3
, a, b, d and M having the same meaning as above.
Even more particularly, the compounds of formula (III) in which a and b are equal to 0 and R
2
is a linear or branched C
2
-C
12
alkylene group such as (CH
2
)
9
, (CH
2
)
10
or —CH(CH
3
)— are preferred.
The silicones comprising at least one carboxylic acid group are described in particular in patent applications WO 95/23579 and EP-A-0,219,830.
Compounds corresponding to formula (III) above are sold, for example, under the name Huile M 642 by the company Wacker, under the names SLM 23 000/1 and SLM 23 000/2 by the company Wacker, under the name 176-12057 by the company General Electric, under the name FZ 3703 by the company OSI and under the name BY 16 880 by the company Toray Silicone.
According to the invention, any anionic or nonionic fixing polymer known per se can be used.
These fixing polymers can be used in dissolved form or in the form of dispersions of solid polymer particles.
The anionic fixing polymers generally used are polymers containing groups derived from carboxylic, sulphonic or phosphoric acids and have a weight-average molecular weight of approximately between 500 and 5,000,000.
1) The carboxylic groups are provided by unsaturated mono- or dicarboxylic acid monomers such as those corresponding to the formula:
in which n is an integer from 0 to 10, A
1
denotes a methylene group, optionally connected to the carbon atom of the unsaturated group, or to the neighbouring methylene group when n is greater than 1, via a hetero atom such as oxygen or sulphur, R
10
denotes a hydrogen atom or a phenyl or benzyl group, R
8
denotes a hydrogen atom or a lower alkyl or carboxyl group, R
9
denotes a hydrogen atom, a lower alkyl group or a —CH
2
—COOH, phenyl or benzyl group.
In the abovementioned formula, a lower alkyl radical preferably denotes a group having 1 to 4 carbon atoms and in particular methyl and ethyl.
The anionic fixing polymers containing carboxylic groups which are preferred according to the invention are:
A) Homo- or copolymers of acrylic or methacrylic acid or salts thereof and in particular the products sold under the names Versicol E or K by the company Allied Colloid and Ultrahold by the company BASF. The copolymers of acrylic acid and
Channavajjala Lakshmi
Finnegan Henderson Farabow Garrett & Dunner LLP
L'Oréal S. A.
LandOfFree
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