Patent ID: 6239228
Filing Date: 2001-05-29
Classification: A61K,C08F,C08L,C09J

Abstract:
A normally tacky copolymer having pressure sensitive adhesive properties comprised of a backbone polymer having at least one polymeric moiety grafted thereto, comprising the reaction product of:(1) at least one A monomer comprising a monomer acrylic or methacrylic acid aliphatic ester of a non-tertiary monoalcohol, said alcohol having from 1 to 30 carbon atoms, wherein at least about 30 percent by weight of said A monomer comprises a monomeric acrylic or methacrylic acid aliphatic ester of a non-tertiary alcohol having at least 12 carbon atoms, and said at least one A monomer exhibiting an average number of carbon atoms of at least 10 in the alcohol portion of the total acrylic or methacrylic acid aliphatic esters of non-tertiary monoalcohols,(2) optionally at least one B monomer, said backbone polymer formed from said A and B monomers,(3) optionally an polymeric graft moiety C having a T.sub.g greater than 20.degree. C., and(4) a graft macromer D containing repeat hydrophilic units,and wherein said A monomer is present in said copolymer in an amount within the range of from about 20 to 80 percent by weight.