Microcellular heterocyclic polymer structures

Details Microcellular heterocyclic polymer structures Microcellular heterocyclic polymer structures

1979-07-24

1981-04-14

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 41, 521 64, 521134, 521184, 521189, C08J 928

Patent

active

042620945

ABSTRACT:
Highly useful novel microcellular polymeric structures, especially films and fibers, are prepared from certain solid polymers. Aromatic polysulfones, polyimides, polyhydantoins, polyamides and polyparabanic acid are the preferred ones for the novel structures of the invention.

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patent: 3450650 (1969-06-01), Murata
patent: 3544489 (1970-12-01), Dowbenko et al.
patent: 3547897 (1970-12-01), Patton
patent: 3591562 (1971-07-01), Patton
patent: 3635905 (1972-01-01), Patton
patent: 3655591 (1972-04-01), Seiner
patent: 3661859 (1972-05-01), Patton

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