Patent ID: 8093352

Claim:
A polymer having the formula wherein [A] x , [B] y and [C] z are poly(alkylene oxides) each independently selected from the group consisting of poly(ethylene oxide), poly(propylene oxide), and poly(butylene oxide); Z is selected from the group consisting of —CH 2 CH═CHCH 2 —, —CH 2 CH 2 CH 2 CH 2 —, —CH 2 —C≡C—CH 2 —, —CH 2 CH 2 —O—CH 2 CH 2 —, —CH 2 —N(CH 2 CH 2 ) 2 N—CH 2 —, —CH 2 CH(OH)CH(OH)CH 2 — and —CH 2 —C 6 H 4 —CH 2 —; R is —(CR 1 R 2 ) m CR 3 R 4 — wherein m is an integer from 0 to 3 and R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of H, CH 3 and CH 2 CH 3 ; n is an integer from 1 to 30; x is either 0 or an integer from 2 to 20; y is an integer from 2 to 20; z is either 0 or an integer from 2 to 20; R′ is a branched or unbranched alkyl group having from 1 to 3 carbon atoms and is optionally substituted by one or two hydroxyl groups; Q1 and Q2 are independently selected from the group consisting of —CH 2 CH═CHCH 2 —X, —CH 2 C≡C—CH 2 —X, —N(R′) 2 , —N(R′) 3 , —N(R′)(R″), and —N(R′) 2 (R″), wherein X is a halogen atom and R″ is a benzyl group; and a stoichiometric amount of a pharmaceutically acceptable anion.