Patent ID: 7157204

Claim:
A soluble polyimide comprising at least one reactive end-cap group at one or both ends of the polymer chain, the soluble polyimide represented by the following Formula 1: wherein: X is a tetravalent aromatic or aliphatic organic group, Y is a tetravalent aromatic or aliphatic organic group, each of R 1 and R 2 is independently a monovalent organic group of H or CH 2 OR 3 (in which R 3 is an alkyl group having not more than 6 carbon atoms), and with the proviso that both R 1 and R 2 are not H, and m is an integer of from about 10 to about 1000, in which the reactive end-cap group is derived from a monoamine or monoanhydride compound that has at least one carbon-carbon double bond.