Composition, particularly for cosmetics, containing star shaped polymers, the polymers themselves and their use

摘要

Polymers (I) having a star structure and cosmetic or pharmaceutical compositions containing them, are new. Polymers having a star structure of formula (I) are new. A-((M1)p1-(M2)p2.....(Mj)pj)n (I) A = a multifunctional center, having a functionality of n; n = an integer of 2 or more; -((M1)p1-(M2)p2.....(Mj)pj) = a polymeric chain comprising polymerized monomers Mi which may be the same or different and having a polymerization index pj, each branch being the same or different and being linked covalently to the center A; i = 2 or more; and pj = 2 or more. The polymer comprising one or more monomers Mi of which the corresponding homopolymer has a glass transition temperature, Tg, of 0 degrees C or more, preferably over 10 degrees C, the monomers Mi comprising 55-98 % of the final polymer, especially 80-90 wt.%, and the polymer also contains one or more monomers Mj of which the corresponding homopolymer has a Tg below or equal to 0 degrees C, preferably below -10 degrees C, these monomers being 2-45 % of the final polymer, preferably 10-20 wt.%. The polymeric chains are preferably present as blocks with a molecular weight of 500-20000 Monomers used to prepare these polymers are preferably (meth)acrylic esters of 1-20C aliphatic alcohols, 1-20C (meth)acrylic est having perfluoroalkyl groups, 1-20C (meth)acrylic esters having siloxane groups, (meth)acrylic amides prepared from aliphatic, aromatic, or cyclic amines, preferably of 1-20C, vinyl, allyl, or methallyl esters of 1-10C aliphatic or cyclic alcohols, vinylcaprolactam, optionally substituted styrene, and their mixtures. At least one of the monomers Mi or Mj preferably have hydrophilic groups, such as alcohol, acid, amine and/or amide groups.