Patent ID: 7652124
Filing Date: 2010-01-26
Classification: C08G

Abstract:
1. A rigid heterocyclic polymer which comprises at least one first recurring unit selected from the group consisting of recurring units represented by each of the following formulae (A) and (B): wherein n is an integer of 1 to 4, X is O, S or NH, Ar and at least one second recurring unit selected from the group consisting of recurring units represented by each of the following formulae (C) and (D): wherein X is O, S or NH, Ar which satisfies the following expression (1): wherein a, b, c and d represent the numbers of moles of the recurring units represented by the formulae (A), (B), (C) and (D), respectively, and which polymer has a reduced viscosity at 25° C. of 0.05 to 200 dl/g measured as a solution which has been prepared by dissolving the polymer in methanesulfonic acid at a concentration of 0.5 g/100 ml.