POLYIMIDE OLIGOMERS FOR TWO-STEP HARDENING

摘要

FIELD: chemistry. ^ SUBSTANCE: citraconic anhydride and itaconic anhydride are used as molecular weight control agents in binding and hardening reactions during formation of a polyamide acid oligomer and polyimide oligomers. The invention also relates to obtaining prepregs and high-temperature adhesives made from the said oligomers, as well as high-temperature composites with low void volume. ^ EFFECT: pure two-step hardening. ^ 11 cl, 25 ex, 8 tbl