Patent ID: 7705103

Claim:
A copolymer prepared from components comprising: a) a precursor of Formula II wherein each R 1 is independently an alkyl, haloalkyl, aralkyl, alkenyl, aryl, or aryl substituted with an alkyl, alkoxy, or halo; each R 2 is independently an alkyl, haloalkyl, aryl, or aryl substituted with an alkyl, alkoxy, halo, or alkoxycarbonyl; each Y is independently an alkylene, aralkylene, or a combination thereof; n is independently an integer of 0 to 1500; and p is an integer of 1 to 10; and b) a diamine of formula R 3 HN-G-NHR 3 , wherein G is a divalent residue unit equal to the diamine minus the two —NHR 3 groups; and R 3 is hydrogen or alkyl or R 3 taken together with G and with the nitrogen to which they are both attached forms a heterocyclic group; wherein the molar ratio of the precursor of Formula II to the diamine is less than 1:1.20 or greater than 1:0.80.