Patent ID: 8716403

Claim:
A prepolymer prepared by condensation reaction between a first compound represented by Formula (1) below: Ar—H (1), where Ar comprises (a) a crosslinkable moiety at one end, (b) a moiety selected from the group consisting of —O—, —S—, —COO—, —CO—, —COS—, —SO 2 —, and —NH—, and (c) one or two repeating units selected from the group consisting of: where A is carbon or nitrogen, and X is hydrogen or halogen; and a second compound selected from the group consisting of an aromatic moiety having a structure as follows: where y is an integer from 0 to 1000, Y 0 is selected from the group consisting of —, —O—, —S—, —COO—, —CO—, —COS—, —SO 2 —and —NH—, E is selected from the group consisting of the following structures: where Y 10 is selected from the group consisting of —, —O—, —S—, —COO—, —CO—, —COS—, —SO 2 —, —NH—, s and t are each independently an integer from 1 to 50, u is an integer from 0 to 50,and v is an integer from 1 to 100, and D is selected from the group consisting of the following structures: where w and x are each independently an integer from 1 to 20.