| 摘要 |
PROBLEM TO BE SOLVED: To provide a transparent polyimide copolymer which highly satisfies solvent-solubility, storage stability, heat resistance, mechanical strength and heat yellowing resistance and has excellent practical utility, and to provide a polyimide resin composition, a molded body and a method for producing the copolymer.SOLUTION: There is provided a transparent polyimide copolymer which is obtained by copolymerization of (A) 4,4'-oxydiphthalic acid dianhydride and/or 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride and (B) one or more diamines and/or diisocyanates represented by the following general formulas (1) to (3) (wherein, X is an amino group or an isocyanate group, Rto Reach independently is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkenyl group having 2 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and at least one of Rto Ris not a hydrogen atom.). |
