Polyarylene sulfide foams and a process for their production

Details Polyarylene sulfide foams and a process for their production Polyarylene sulfide foams and a process for their production

1997-10-21

1998-08-04

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 79, 521 81, 521134, 521180, 521189, C08J 902

Patent

active

057894523

ABSTRACT:
A foamed polyarylene sulfide according to the invention has a density which is reduced by at least 50% compared with the theoretical density of nonfoamed material, and is expediently produced by subjecting a polyarylene sulfoxide as such or a mixture of one or more polyarylene sulfides with a polyarylene sulfoxide to heat treatment. The temperature of the heat treatment is in the range from 250.degree. to 400.degree. C.

REFERENCES:
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patent: 3998767 (1976-12-01), Walton
patent: 4840758 (1989-06-01), Thorsud
patent: 4885321 (1989-12-01), Nitoh et al.
patent: 5114983 (1992-05-01), Stahlke et al.
patent: 5126380 (1992-06-01), Stahlke et al.

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