| 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 such as a naphthalene ring or the like; R<SP>1</SP>is cyano, a halogen atom or an alkyl; R<SP>2</SP>is a hydrocarbon group, an alkoxy, an aryloxy or the like; R<SP>3</SP>is an aliphatic hydrocarbon such as methylene or the like; (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 |
