Patent ID: 7763687

Claim:
An amphiphilic polymer comprising formula I: wherein each R 1 is independently aryl or alkoxycarbonyl; each R 2 is independently a pyridine or a pyridine(C 1 -C 10 )alkyl group, wherein at least 10% of the nitrogen atoms of the pyridine moieties are quaternized; wherein one or more quaternized pyridine-containing substituents are quaternized with (C 1 -C 30 )alkyl groups and one or more quaternized pyridine-containing substituents are quaternized with alkyl groups that include one or more ethylene glycol groups; each R 3 is independently hydrogen or methyl; wherein any alkyl, aryl, or alkoxy is optionally substituted with one or more alkyl, alkoxy, halo, dialkylamino, trifluoromethyl, ethylene glycol, or perfluoroalkyl groups; each m is about 5 to about 2000; each n is about 5 to about 2,000; p is about 5 to about 100; and the dispersement of each individual m subunit and each individual n subunit on either side of z* is random and each individual m subunit and each individual n subunit occurs interchangeably with any other m or n subunit within the brackets of formula I; or the dispersement of each individual m subunit and each individual n subunit on either side of z* is that of a block copolymer.