Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions – Polymer containing
Reexamination Certificate
1998-09-02
2002-02-26
Azpuru, Carlos A. (Department: 1615)
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
Polymer containing
C525S477000, C526S279000
Reexamination Certificate
active
06350439
ABSTRACT:
This application claims priority based on the French Application No. 95/12,234 filed Oct. 18, 1995 and the corresponding Patent Cooperation Treaty International Application No. PCT/FR96/01571 filed on Oct. 8, 1996. The content of these applications is incorporated by reference.
The present invention relates to an aqueous composition for treating keratin substances, in particular human hair, in the form of a lacquer packaged in an aerosol device for producing a lacquer, comprising a small amount of organic solvent and at least one grafted silicone polymer comprising a polysiloxane portion and a portion consisting of a non-silicone organic chain, one of the two portions constituting the main chain of the polymer, the other being grafted onto the said main chain.
In the text hereinbelow, the term “lacquer” is understood to refer to any composition coming from the outlet of a spray device in the form of liquid droplets sprayed directly onto the keratin support.
Polymers of the grafted silicone polymer type comprising a polysiloxane portion and a portion consisting of a non-silicone organic chain, one of the two portions constituting the main chain of the polymer and the other being grafted onto the said main chain, are known for their styling properties. They are particularly advantageous in hair cosmetics on account of the fact that they give the hair hold.
For a certain number of years, quite specific interest has arisen in aerosol lacquers as a means of packaging formulations for maintaining the hairstyle and/or shaping the hairstyle. Aerosol lacquers containing grafted silicone polymers as described above are generally alcoholic and more preferably aqueous-alcoholic and generally also contain a surfactant. These compositions, containing more than 25% by weight of organic solvent, have a tendency, after the said polymers have been deposited, of leading to phenomena of foaming, giving insufficient sheen properties, giving fixing powers that are not entirely sufficient and making the hair lank (charge effects).
The Applicant has found, surprisingly, that the use of a polymer of the grafted silicone polymer type comprising a polysiloxane portion and a portion consisting of a non-silicone organic chain, one of the two portions constituting the main chain of the polymer and the other being grafted onto the said main chain, in an aqueous lacquer, pressurized in an aerosol device, comprising at least 30% by weight of water and not more than 25% by weight of organic solvent, after application and drying, makes it possible to improve the sheen of the hair and to have a better lacquering power. In addition, this use makes it possible to substantially reduce the charge effects on the hair, or even to eliminate them altogether.
The Applicant has also observed that the pressurized aqueous lacquers in accordance with the invention do not lead to phenomena of foaming on the hair, resulting in a whitening effect, or to phenomena of powdering or smearing. They also provide good styling and restyling properties, good hold to the hair and easy disentangling.
The aqueous composition according to the present invention, packaged in an aerosol device and producing a lacquer at the device outlet, is characterized in that it comprises:
(a) at least one grafted silicone polymer comprising a polysiloxane portion and a portion consisting of a non-silicone organic chain, one of the two portions constituting the main chain of the polymer, the other being grafted onto the said main chain;
(b) at least 30% by weight of water;
(c) at least one propellant;
(d) an amount of organic solvent ranging from 0 to 25% by weight; the weight percentages being defined relative to the total weight of the composition in the aerosol.
The grafted silicone polymers according to the invention are preferably chosen from polymers containing a non-silicone organic skeleton grafted with monomers containing a polysiloxane, polymers containing a polysiloxane skeleton grafted with non-silicone organic monomers and mixtures thereof.
In the following text, in accordance with what is generally accepted, the term silicone or polysiloxane 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 bond ≡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).
In the following text, in accordance with what is generally accepted, the expression “polysiloxane macromer” is understood to refer to any monomer containing a polysiloxane-type polymer chain in its structure.
The polymers containing a non-silicone organic skeleton grafted with monomers containing a polysiloxane, in accordance with the present invention, consist of an organic main chain formed from organic monomers containing no silicone, on which is grafted, inside the said chain and optionally on at least one of its ends, at least one polysiloxane macromer.
The non-silicone organic monomers constituting the main chain of the grafted silicone polymer can be chosen from monomers containing ethylenic unsaturation which are polymerizable via a radical route, monomers which are polymerizable by polycondensation, such as those forming polyamides, polyesters or polyurethanes, and monomers which involve ring opening, such as those of the oxazoline or caprolactone type.
The polymers containing a non-silicone organic skeleton grafted with monomers containing a polysiloxane, in accordance with the present invention, can be obtained according to any means known to those skilled in the art, in particular by reaction between (i) a starting polysiloxane macromer which is correctly functionalized on the polysiloxane chain and (ii) one or more non-silicone organic compounds, themselves 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 radical reaction between a vinyl group borne on one of the ends of the silicone with a double bond of a monomer containing ethylenic unsaturation in the main chain.
The polymers containing a non-silicone organic skeleton grafted with monomers containing a polysiloxane, in accordance with the invention, are more preferably chosen from those described in U.S. Pat. Nos. 4,693,935, 4,728,571 and 4,972,037 and patent applications EP-A-0,412,704, EP-A-0,412,707, EP-A-0,640,105 and WO 95/00578. These are copolymers obtained by radical polymerization starting with monomers containing ethylenic unsaturation and silicone macromers having a terminal vinyl group, or alternatively copolymers obtained by reaction of a polyolefin comprising functionalized groups and a polysiloxane macromer having a terminal function which is reactive with the said functionalized groups.
One particular
Azpuru Carlos A.
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
L'Oreal
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