Reactive polyimides for addition to thermosetting resins, and pr

Details Reactive polyimides for addition to thermosetting resins, and pr Reactive polyimides for addition to thermosetting resins, and pr

1990-12-20

1992-04-14

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528208, 528489, 528499, C08G 6926, C08G 6306, C08F 600

Patent

active

051049708

ABSTRACT:
Thermoplastics containing imide groups in the polymer backbone, soluble in an unmodified state, are rendered reactive with thermosetting resins by partial conversion of the polymer backbone to provide reactive groups. The modified polymer may be added as microspheres to a thermosetting resin, subsequently crosslinking therewith supressing solvent sensitivity in a fiber reinforced matrix composite comprising the toughened resin as the matrix therefore. The modified polymer microspheres retain their physical identity in the cured composite structure.

REFERENCES:
patent: 3536666 (1970-10-01), Berg
patent: 3856752 (1974-12-01), Bateman et al.
patent: 3891601 (1975-06-01), Peterson et al.
patent: 3988303 (1976-10-01), Korshak et al.
patent: 4151346 (1979-04-01), Sextro et al.

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