PHOTOACTIVE GRAFTED POLYSACCHARIDE AND USE THEREOF IN COSMETICS
申请人:L'OREAL
公开号:US20170361131A1
公开(公告)日:2017-12-21
The invention relates to a polysaccharide polymer of formula (I):
PS—(O—CO-L-X)
a
(OH)
b
(I)
in which PS denotes the basic backbone of the polysaccharide bearing the hydroxyl groups;
L is a divalent hydrocarbon-based group comprising from 1 to 20 carbon atoms;
X denotes a photoactive group of azide or diazirine type;
a denotes the content of OH groups substituted with the photoactive group;
b denotes the content of unsubstituted free OH groups;
a being between 0.02 and 0.5; b being between 0.5 and 0.98;
and a+b=1.
The invention also relates to a composition comprising the polymer (I) in a physiologically acceptable medium, and also to a cosmetic process for caring for the skin, comprising the topical application to the skin of said composition and exposure of the treated skin to light radiation.