Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions – Polymer containing
Reexamination Certificate
2000-06-19
2002-06-04
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
Polymer containing
C424S070100, C424S070110
Reexamination Certificate
active
06399050
ABSTRACT:
The subject-matter of the invention is a hair cosmetic composition in the form of a water-in-silicone emulsion comprising at least one fixing polymer. The invention is also targeted at the application of the hair cosmetic composition in the manufacture of hair formulations, such as care products, conditioning products, or products for fixing and/or retaining the form of the hair.
Hair cosmetic compositions generally comprise at least one polymer, preferably an anionic, non-ionic, or amphoteric polymer. They can, for example, contribute fixing properties to the hair.
The most commonly used formulations are generally provided in the form of an aerosol mousse, of an aerosol spray, of a pump-action spray, or else of a gel.
Mousses generally make it possible to obtain good distribution of the cosmetic compositions over the hair and they are, in addition, easy to use. As the polymers used in these products are generally non-foaming or weakly foaming, it is necessary to add a foaming agent and/or an agent, which improves the quality of the mousse.
The foaming agents and/or agents, which improve the quality of the mousse, commonly used are, for example, anionic, non-ionic, or amphoteric surface-active agents. However, these surface-active agents sometimes bring about refoaming on wet hair, which is detrimental to rapid and careful styling of the hair.
Furthermore, the application of mousse to the hair sometimes exhibits the disadvantage of rendering the hairstyle lank. Finally, the preparation of mousses necessarily requires an aerosol device.
Aerosol sprays make possible the fast and homogeneous distribution of the product over the hair and provide, for example, very good qualities of form retention and of hold of the hairstyle. However, they sometimes exhibit the disadvantage of giving a sticky feel on application and a rough feel after drying; their cosmetic qualities are limited. Furthermore, they require, just like mousses, the use of an aerosol device.
Among the documents of the prior art disclosing hair cosmetic compositions, which are provided in particular in the form of mousses or sprays, the document EP 260,641, incorporated herein by reference, discloses emulsions comprising 0.1 to 5% by weight of a dimethylpolysiloxane/polyoxyalkylene copolymer having a cloud point of ranging from 20 to 40° C., 0.05 to 10% of a silicone oil, and 0.1 to 10% of a fixing polymer, which is soluble in water or a mixture of water and alcohol, as well as ionic or non-ionic surface-active agents, in a water/alcohol mixture.
Gels are another galenic form commonly used to contribute, for example, effective form retention to the hairstyle by virtue of the polymers of which they comprise. However, some disadvantages are observed, such as a texture, which confers lankness on application (due to the presence of some thickeners), a sticky feel, a hairstyle that is not very natural, and a lack of softness.
The Inventors have discovered, surprisingly and unexpectedly, contrary to all expectations, that it is possible to prepare hair cosmetic compositions, which can have fewer of the disadvantages expressed above, by choosing, as a cosmetic vehicle, a specific emulsion of water and of silicone, which will be defined in detail subsequently.
The subject-matter of the invention is a hair cosmetic composition in the form of a water-in-silicone emulsion comprising in a cosmetically acceptable medium:
(i) at least one non-oxyalkylenated silicone chosen from linear and cyclic, volatile and non-volatile, and arylated and non-arylated silicones, wherein the total non-oxyalkylenated silicone is more than 10% by weight with respect to the total weight of the composition;
(ii) at least one emulsifying oxyalkylenated silicone; and
(ii) at least one anionic, cationic, amphoteric, or non-ionic fixing polymer.
Another subject-matter of the invention is a hair cosmetic process employing this composition.
Another subject-matter of the invention is more particularly a process for fixing and/or maintaining the form of the hair employing this composition.
Yet another subject-matter of the invention is the use of this composition in the manufacture of hair products, in particular those intended for the fixing and/or shaping of the hairstyle.
Within the meaning of the present invention, the term “water-in-silicone emulsion” is understood to mean a dispersion with non-continuous phase formed by an aqueous phase and a continuous phase formed by a fatty phase, the continuous phase being mainly composed of the said silicone.
The hair cosmetic compositions in accordance with the present invention advantageously exhibit a viscosity, measured by means of a Rheomat RM 180 at 25° C. with reading after 30 seconds, of greater than 5 ps and more advantageously still of greater than 10 ps, at a shear rate of 200 s
−1
.
Within the meaning of the present invention, the term “non-oxyalkylenated silicone” is understood to mean any organosilicone polymer or oligomer with a branched or crosslinked and linear or cyclic structure of variable molecular weight obtained by polymerization and/or polycondensation of suitably functionalized silanes and essentially composed of a repetition of main units in which the silicon atoms are connected to one another via oxygen atoms with the formation of a siloxane bond ≡Si—O—Si≡, optionally substituted hydrocarbonaceous radicals being directly bonded from a carbon atom to the said silicon atoms. The most common hydrocarbonaceous radicals are alkyl radicals, especially C
1
-C
10
alkyl radicals in particular methyl radicals, fluoroalkyl radicals, and aryl radicals in particular phenyl radicals. Such non-oxyalkenated silicones are, for example, sold under the trade name DC 1501 Fluid by the company Dow Corning.
The non-oxyalkylenated silicones can be modified, for example by carboxyl groups.
It is possible, for example, to use non-oxyalkylenated silicone with a carboxyl functional group corresponding to the formula II′:
in which the R
4
radicals are identical or different and are chosen from linear and branched C
1
-C
22
alkyl radicals, C
1
-C
22
alkoxy radicals, carboxyl radicals, and phenyl radicals; the R
5
, R
6
, and R
7
radicals are identical or different and are chosen from linear and branched C
1
-C
22
alkyl radicals, C
1
-C
22
alkoxy radicals, and carboxyl radicals; c and d are numbers ranging from 0 to 1000; and the sum c+d preferably ranging from 2 to 1000, wherein at least one of the R
4
, R
5
, R
6
, and R
7
radicals is a carboxyl radical.
Use is advantageously made of the products sold under the trade name Oil M 642, SLM 23 000/1, or SLM 23 000/2 by the company Wacker, under the trade name 176-12057 by the company General Electric, under the trade name FZ 3703 by the company OSI, or under the trade name BY 16 880 by the company Toray Silicone.
Preferably, the number-average molecular weight of the silicone polymer ranges from 10,000 to 1,000,000 approximately and more preferably still from 10,000 to 100,000 approximately.
Other non-oxyalkylenated silicones, which are particularly well suited to the implementation of the present invention, are silicones comprising at least one substituent that comprises at least two identical or different groups chosen from carboxylic acids or their salts, amides, and esters. At least one of these groups is a carboxylic acid or its salts.
These silicones preferably comprise at least one unit of formula IV′:
ZR
a
SiO
(3-a)/2
(IV′)
in which the R radicals are identical or different and are chosen from alkyl radicals especially C
1
-C
10
alkyl radicals and in particular methyl radicals, fluoroalkyl radicals especially C
1
-C
10
fluoroalkyl radicals, or C
6
-C
12
aryl radicals and in particular phenyl radicals; a is chosen from 0, 1, and 2 and preferably 1 or 2; and Z is a radical corresponding to the following formula V′:
in which W, R
2
, and R
4
, which are identical or different, are chosen from a covalent bond and linear and branched alkylene radicals having from 1 to 6 carbon atoms, which can com
Belli Emmanuelle
Pasquet Dorothée
Finnegan Henderson Farabow Garrett & Dunner LLP
L'Oreal (S.A.)
Page Thurman K.
Seidleck Brian K.
LandOfFree
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