| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a novel polyimide which retains such characteristics of polyimides as excellent heat resistance, electrical insulation and chemical resistance, of which dielectric constant is lower than those of known polyimides; and to provide a composition containing the same and a method for producing the same. <P>SOLUTION: The crosslinked polyimide having a dielectric constant of at most 2.7, is produced by polycondensation of a tetramine, a tetracarboxyic dianhydride and an aromatic diamine in the presence of a catalyst. The composition containing the polyimide is also provided. <P>COPYRIGHT: (C)2011,JPO&INPIT |
