NEW POLYCARBOXYLIC ACID HAVING FLUORENE SKELETON, AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a polycarboxylic acid having a new fluorene skeleton, excellent in heat resistance etc. SOLUTION: This polycarboxylic acid is expressed by formula (1) [wherein, ring Z is a fused polycyclic aromatic hydrocarbon ring; R1, R2are each an alkyl or the like; R3is an aliphatic hydrocarbon group; R4is an aromatic hydrocarbon group; (k) is an integer of 0 to 4; (m) is an integer of ≥0; and (n) is an integer of ≥1]. COPYRIGHT: (C)2010,JPO&INPIT