Semi-interpenetrating polymer network for tougher and more micro

Details Semi-interpenetrating polymer network for tougher and more micro Semi-interpenetrating polymer network for tougher and more micro

1991-03-06

1992-09-22

Seidleck, James J.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525432, 525903, C08L 7908

Patent

active

051497468

ABSTRACT:
This invention is a process for making a semi-interpenetrating polymer network which includes a high performance thermosetting polyimide having a nadic end group acting as a crosslinking site and a high performance linear thermoplastic polyimide having the following repeating unit: ##STR1## Provided is an improved high temperature matrix resin which is capable of performing at 316.degree. C. in air for several hundreds of hours. This resin has significantly improved toughness and microcracking resistance, excellent processability and mechanical performance, and cost effectiveness.

REFERENCES:
patent: 4695602 (1987-09-01), Crosby et al.
patent: 4695610 (1987-09-01), Egli et al.
patent: 4847333 (1989-07-01), Lubowitz et al.
patent: 4981922 (1991-01-01), Sheppard et al.
patent: 4996101 (1991-02-01), Landis et al.

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