公开(公告)号：JPH07268097A

公开(公告)日：1995-10-17

申请号：JP6099494

申请日：1994-03-30

Applicant: MITSUI TOATSU CHEMICALS

Inventor： SHIBUYA ATSUSHI ,  SAKATA YOSHIHIRO ,  GOI MASAJI ,  YAMAGUCHI TERUHIRO

IPC: C08G73/10

Abstract: PURPOSE:To obtain a polyimide excellent in thermal oxidation stability, dimensional stability, flame retardancy and electrical insulation properties. CONSTITUTION:This polyimide is the one having a C1 content of 10ppm or below and comprising repeating units represented by the formula (wherein R1 is a 2-27C bivalent group selected from the group consisting of an aliphatic group, a cycloaliphatic group, a monocyclic aliphatic group, a fused polycyclic aromatic group and a nonfused polycyclic aromatic group composed of aromatic groups bonded with each other directly or through bridging members; and R2 is a 2-27C tetravalent group selected from the group consisting of an aliphatic group, a cycloaliphatic group, a monocyclic aliphatic group, a fused polycyclic aromatic group and a nonfused polycyclic aromatic group composed of aromatic groups bonded with other directly or through bridging members).