A - Human Necessities – 61 – K
Patent
A - Human Necessities
61
K
A61K 8/365 (2006.01) A61K 8/44 (2006.01) A61K 8/46 (2006.01) A61K 8/49 (2006.01) A61K 8/81 (2006.01) A61Q 1/02 (2006.01) A61Q 5/02 (2006.01) A61Q 11/00 (2006.01) A61Q 17/00 (2006.01) A61Q 17/04 (2006.01) A61Q 19/02 (2006.01) A61Q 19/08 (2006.01) A61Q 19/10 (2006.01)
Patent
CA 2209430
The invention relates to a cosmetic and/or dermatological composition containing an acid aqueous medium and at least one cross-linked poly(2-acrylamido 2-methylpropane sulfonic acid) polymer neutralized to a least 90%. It generally includes the following, distributed in random fashion: (a) from 90 to 99.9% by weight of units of the following general formula (1): (see Figure 1) in which X+ designates a cation or mixture of cations, of which at most 10% mol of the X+ cations may be H+ protons; (b) from 0.01 to 10% by weight of the cross-linking units of at least one monomer have at least two olefinic double bonds; the weight proportions being defined in related to the total weight of the polymer. The invention also relates to use of this composition for the cosmetic treatment of keratinous matter, including the skin, hair and mucosa, particularly a non-therapeutic process of skin depigmentation.
L'invention se rapporte à une composition cosmétique et/ou dermatologique contenant un milieu aqueux acide et au moins un polymère poly(acide 2-acrylamido 2-méthylpropane sulfonique) réticulé et neutralisé à au moins 90%. Il comprend en général, distribués de façon aléatoire: a) de 90 à 99,9% en poids de motifs de formule générale (1) suivante: (voir fig. I) dans laquelle X+ désigne un cation ou un mélange de cations, au plus 10% mol descations X+ pouvant être des protons H+; b) de 0,01 à 10% en poids de motifs réticulants provenant d'au moins un monomereayant au moins deux doubles-liaisons oléfiniques; les proportions en poids étant definis par rapport au poids total du polymere. L'invention se rapporte aussi à une utilisation de cette composition pour le traitement cosmétique des matières kératiniques en particulier la peau, les cheveux et les muqueuses notamment à un procédé non-thérapeutique de dépigmentation de la peau.
Dupuis Christine
Hansenne Isabelle
Lorant Raluca
Maubru Mireille
Sebillotte-Arnaud Laurence
L'oreal
Robic
LandOfFree
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