Preparation of polyimide compositions with cyclic peroxyketal ca

Details Preparation of polyimide compositions with cyclic peroxyketal ca Preparation of polyimide compositions with cyclic peroxyketal ca

1980-04-18

1982-07-06

Anderson, Harold D.

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

Synthetic resins

From ketone or ketene reactant

4284735, 4284744, 528229, 528336, 528342, 528351, 528353, C08G 7310

Patent

active

043384307

ABSTRACT:
The present invention provides an improvement in a process for preparing polyimide compositions from a mixture of monomers by the application of heat in two stages. The improvement comprises incorporating a cyclic peroxyketal catalyst, such as 3,6,6,9,9,-pentamethyl-3-(ethylacetate)-1,2,4,5-tetraoxycyclononane, into the monomer mixture prior to reaction.

REFERENCES:
patent: 3528950 (1970-09-01), Lubowitz
patent: 3575924 (1971-04-01), Bargain
patent: 3671490 (1972-06-01), Bargain
patent: 3745149 (1973-07-01), Serafini et al.
patent: 3763114 (1973-10-01), Saluti et al.
patent: 3772254 (1973-11-01), Jones
patent: 4110294 (1978-08-01), Pickering et al.
Physical Chemistry of High Polymeric Systems, Mark et al., Second Edition (1950), pp. 274-275.

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