Patent ID: 7691917

Claim:
A prepolymer comprising at least one block of Formula II and terminated with a polymerizable ethylenically unsaturated radical: wherein n is at least 1, R is independently a monovalent hydrocarbon radical having 1 to 30 carbon atoms which may include ether linkages therebetween or a halogen substituted monovalent hydrocarbon radical having 1 to 20 carbon atoms which may include ether linkages therebetween, a C 1 -C 20 ester group, an ether or polyether-containing group, an ureido group, an amide group, an amine group, a substituted or unsubstituted C 1 -C 30 alkoxy group, a substituted or unsubstituted C 5 -C 30 heteroaryl group, a substituted or unsubstituted C 3 -C 30 heterocyclic ring, a substituted or unsubstituted C 4 -C 30 heterocycloalkyl group, a substituted or unsubstituted C 6 -C 30 heteroarylalkyl group, fluorine or a vinyl group, R 1 is independently a substituted or unsubstituted divalent hydrocarbon radical having 1 to 30 carbon atoms which may include ether linkages therebetween, X + is independently a cationic-containing group and R 2 is a diradical residue of a diisocyanate.