Chemical approach for controlling nadimide cure temperature and

Details Chemical approach for controlling nadimide cure temperature and Chemical approach for controlling nadimide cure temperature and

1983-12-14

1985-02-05

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

526217, 526262, 528229, 528315, 528322, 528336, C08G 6902

Patent

active

044979487

ABSTRACT:
Polyimide resins suitable for use as composite matrix materials are formed by copolymerization of maleic and norbornenyl endcapped monomers and oligomers. The copolymers can be cured at temperatures under about 300.degree. C. by controlling the available concentration of the maleic end-capped reactant. This control can be achieved by adding sufficient amounts of said maleic reactant, or by chemical modification of either copolymer, so as to either increase Diels-Alder retrogression of the norbornenyl capped reactant and/or holding initiation and polymerization to a rate compatible with the availability of the maleic-capped reactant.

REFERENCES:
patent: 3179634 (1965-04-01), Edwards
patent: 3565549 (1971-02-01), Lubowitz et al.
patent: 3745149 (1973-07-01), Serafini et al.

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