ESTER GROUP-CONTAINING TETRACARBOXYLIC ACID DIANHYDRIDE, POLYESTER POLYIMIDE PRECURSOR, POLYESTERIMIDE, AND METHODS FOR PRODUCING SAME
申请人:Hasegawa Masatoshi
公开号:US20120029164A1
公开(公告)日:2012-02-02
Disclosed is a polyesterimide having a repeating unit expressed by the formula below, and also provides the manufacturing methods thereof:
wherein R represents a phenyl group, R
1
represents an alkyl group with 1 to 6 carbon atoms or alkoxy group with 1 to 6 carbon atoms, n each independently takes a value of 0 to 4, a each independently takes a value of 0 to 4, and m represents an integer of 2 to 4, where not all n's are 0 at the same time and 0≦n+a≦4 is satisfied by each phenylene group, and X is a divalent aromatic group and/or aliphatic group.