| 摘要 |
PURPOSE:To obtain titled polymer of outstanding thermal stability, with improved processability and workability, suitable for wire coating material, heat- resistant film, heat-resistant functional material, etc., by the reaction between a polymaleimide and a specific active methylene compound. CONSTITUTION:The objective polymer can be obtained by the reaction, at 0- 160 deg.C, either in the presence or absence of an organic solvent (e.g., dimethylformamide), between (A) a polymaleimide of formulaI[R is H, halogen, 1-5C alkyl, CF3 or phenyl; R1 is a divalent hydrocarbon group derived from an aldehyde or a ketone of formula O=R1 (R1 is a 1-8C divalent hydrocarbon group); l is 0.1-10],[e.g., 1-N-maleimide-2,4-bis(4'-N-maleimidebenzyl)benzene]and (B) an active methylene compound of formula II (R2 is CN, NO2, carboxyl, etc.), e.g., malononitrile. |
