Patent ID: 6458906
Filing Date: 2002-10-01
Classification: A61K,A61Q,C08F

Abstract:
A water or alcohol soluble or dispersible thermoplastic elastomeric copolymer having a backbone and one or more polymeric side chains, said copolymer formed from the copolymerization of randomly repeating A and B units and corresponding to the formula[A]a[B]b wherein(i) A is at least one polymerizable monomer unit corresponding to the formula â€ƒwherein X is selected from the group consisting of â€”OH, â€”OM, â€”OR4, â€”NH2, â€”NHR4, and â€”N(R4)2; M is a cation selected from the group consisting of Na+, K+, Mg++, Ca++, Zn++, NH4+, alkylammonium, dialkylammonium, trialkylammonium, and tetralkylammonium; each R4 is selected from the group consisting of H, C1-C8 straight or branched chain alkyl, N,N,-dimethylaminoethyl, 2-hydroxyethyl, 2-methoxyethyl, and 2-ethoxyethyl; and R5 and R6 are independently selected from the group consisting of H, C1-C8 straight or branched chain alkyl, methoxy, ethoxy, 2-hydroxyethoxy, 2-methoxyethyl, and 2-ethoxyethyl; (ii) B is at least one hydrophilic macromonmer unit copolymerizable with A corresponding to the formula â€ƒwherein E is an ethylenically unsaturated moiety, copolymerizable with A, selected from the group consisting of vinyl, allyl, acryloyl, methacryloyl, ethacryloyl, 3-vinylbenzoyl, and 4-vinylbenzoyl; R and Râ€² are independently selected from the group consisting of H and C1-C8 straight or branched chain alkyl; and m is an integer form about 10 to about 2000; and (iii) a is an integer of about 100 or greater and b is an integer of about 2 or greater; and wherein said copolymer exhibits two distinct Tg values, said first Tg corresponding to said backbone and having a value less than about 0Â° C., and said second Tg corresponding to said polymeric side chains and having a value greater than about 25Â° C.