Patent ID: 6251964
Filing Date: 2001-06-26
Classification: A61L

Abstract:
A terpolymer having an overall cationic charge formed from ethylenically unsaturated monomers includinga) a zwitterionic monomer of the formula IYBX IwhereinB is selected from the group consisting of a bond, and straight and branched alkylene, alkylene-oxa-alkylene, and alkyleneoligooxa-alkylene groups any of which optionally includes one or more fluorine substituentsX is an organic group having a zwitterionic moiety; andY is ethylenically unsaturated polymerisable group;b) a cationic monomer of the formula IIY.sup.1 B.sup.1 Q.sup.1 IIwhereinB.sup.1 is selected from the group consisting of a bond, and straight and branched alkylene, alkylene-oxa-alkylene and alkylene-oligooxa-alkylene groups, any of which optionally includes one or more fluorine substituents;Y.sup.1 is an ethylenically unsaturated polymerisable group; andQ is an organic group having a cationic moiety; andc) in a minimum amount of about 30 mole %, a termonomer of the formula IIIY.sup.2 B.sup.2 Q.sup.2 IIIwhereinY.sup.2 is an ethylenically unsaturated polymerisable group; andB.sup.2 and Q.sup.2 together represent a C.sub.6-24 -alkyl group.