Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions – Polymer containing
Patent
1994-08-22
1997-10-21
Webman, Edward J.
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
Polymer containing
424 7017, 424 59, 424DIG2, 514880, 514881, A61K 711, A61K 715, A61K 742, A61K 4736
Patent
active
056793286
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 of PCT/FR94/00170 filed Feb. 16, 1994.
The invention relates to a thickening combination based on guar gums or on nonionic cellulose gums having no hydrophobic group and on specific crosslinked polymers and to a cosmetic or dermatological hair or skin treatment composition containing such a combination.
In order to contribute softness to hair or to the skin or alternatively to facilitate disentangling of hair, certain crosslinked polymers such as crosslinked acrylamide copolymers or polymers are used in cosmetics or in dermatology. These polymers have viscosities which make it possible to obtain appropriate thickening properties for cosmetic and dermatological formulations, good softness properties for hair or the skin and a pleasant feel.
However, the viscosity of these crosslinked polymers is very sensitive to additives such as alcohols, certain anionic or cationic polymers or certain antidandruff agents. The addition of these additives can cause fluidification phenomena which are undesirable for the texture of cosmetic or dermatological formulations containing these crosslinked polymers.
The Applicant Company has surprisingly discovered that, by combining specific thickeners chosen from guar gums and nonionic cellulose gums having no hydrophobic group with certain crosslinked polymers, a viscosity synergetic effect was observed for the crosslinked polymers which makes it possible to overcome the disadvantages mentioned above.
The specific combination in accordance with the present invention makes it possible to prepare cosmetic or dermatological compositions based on crosslinked polymers in the gel, cream, emulsion or dispersion form whose rheological properties are substantially improved.
One subject of the invention is therefore composed of a thickening combination based on guar gum or on nonionic cellulose gum having no hydrophobic group and on specific crosslinked polymers.
A subject of the invention also relates to a cosmetic or dermatological composition containing such a combination.
Another subject relates to cosmetic hair or skin treatment processes using these compositions according to the desired application.
Other subjects will become apparent in the light of the following description and examples.
The present invention mainly relates to a thickening combination, which comprises, in an aqueous medium: gum, having no hydrophobic group, having a viscosity, as a 1.5 weight % solution in water, measured with a Drage unit 2 at 25.degree. C., greater than 15 cps; copolymers;
The crosslinked polymer/guar gum or nonionic cellulose gum ratio, as weight of active material, is between 0.2 and 10 and preferably between 1 and 5.
Mention may be made, among the guar gums used according to the present invention, of: Company Meyhall; Colloides.
Mention may be made, among the nonionic cellulose gums used in accordance with the present invention, of: Standard" by the Company Dow Chemical; Company Laserson Sabetay; Aqualon; Aqualon; Company Hoechst.
The crosslinked acrylamide-ammoniumacrylate copolymer used in accordance with the present invention is more particularly an acrylamide-ammonium acrylate (5/95 by weight) copolymer crosslinked by a crosslinking agent possessing olefinic polyunsaturation, such as divinylbenzene, tetraallyloxyethane, methylenebisacrylamide, diallyl ether, polyallyl polyglyceryl ethers or allyl ethers of alcohols from the sugar series, such as erythritol, pentaerythritol, arabitol, mannitol, sorbitol or glucose.
Analogous copolymers are described and prepared in French Patent FR-2,416,723 and U.S. Pat. Nos. 2,798,053 and 2,923,692.
This crosslinked copolymer is used in particular in the form of a water-in-oil emulsion comprising 30 weight % of said copolymer, 25 weight % of liquid paraffin, 4 weight % of a mixture of sorbitan stearate and of a hydrophilic ethoxylated derivative and 41 weight % of water. Such an emulsion is marketed under the name "PAS 5161" or alternatively "Bozepol C" by the Company Hoechst.
The acrylamide and 2-acrylamido-2-methylpropanesulfo
REFERENCES:
patent: 4425241 (1984-01-01), Swanson
patent: 5089252 (1992-02-01), Grollier et al.
patent: 5525356 (1996-06-01), Jevne et al.
"L'Oreal"
Webman Edward J.
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