Composition containing lipid vesicles and a crosslinked...

A - Human Necessities – 61 – K

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Details

A61K 8/81 (2006.01) A61K 8/14 (2006.01) A61K 8/49 (2006.01) A61K 8/63 (2006.01) A61Q 1/02 (2006.01) A61Q 19/00 (2006.01)

Patent

CA 2241305

The present invention relates to a cosmetic and/or dermatological composition comprising an aqueous dispersion of lipid vesicles containing at least one crosslinked poly(2-acrylamido- 2-methylpropanesulfonic acid) neutralized to at least 90%. It also generally contains, randomly distributed: a) from 90 to 99.9% by weight of units of the following general formula (1): (see Fig. I) wherein X+ designates a cation or cation mixture, in which no more than 10 mol% of the X+ cations can be H+ protons; b) from 0.01 to 10% by weight of crosslinking units from at least one monomer having at least two olefin double bonds; the percentage by weight being defined relative to the total weight of the polymer.

La présente invention se rapporte à une composition cosmétique et/ou dermatologique comprenant une dispersion aqueuse de vésicules lipidiques contenant 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 des cations X+ pouvant être des protons H+; b) de 0,01 à 10% en poids de motifs réticulants provenant d'au moins un monomère ayant au moins deux doubles-liaisons oléfiniques; les proportions en poids étant définis par rapport au poids total du polymère.

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