Patent ID: 10328014

Abstract:
The invention relates to a cosmetic process for caring for the skin, more particularly facial skin, in particular wrinkled skin, comprising the topical application to the skin of a cosmetic composition comprising a grafted polysaccharide polymer (I) and exposure of the treated skin to light radiation, polymer (I) being of formula: PS—(CO—NH-L-X)a(COOH)b  in which PS denotes the basic backbone of the polysaccharide bearing the carboxylic acid groups;  L is a divalent hydrocarbon-based group containing from 1 to 20 carbon atoms;  X denotes a photoactive group of azide or diazirine type;  a denotes the content of COOH groups substituted with the group —NH-L-X;  b denotes the content of unsubstituted free COOH groups;  a being between 0.01 and 0.8; b being between 0.2 and 0.99;  a+b=1 The invention also relates to the polymers (I) bearing a photoactive group X of diazirine type and to a composition comprising such a polymer in a physiologically acceptable medium.