Preparation of foams having high heat-distortion resistance, and

Details Preparation of foams having high heat-distortion resistance, and Preparation of foams having high heat-distortion resistance, and

1990-06-07

1992-01-28

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521182, 521189, C08J 914

Patent

active

050844849

ABSTRACT:
Foams of density 0.1 to 1.0 g/cm.sup.3 based on aromatic polyether ketones and other thermoplastic polymers having a high melting point are obtained by melting an intimate mixture of the polymer and from 0.5 to 10% by weight of an aliphatic or aromatic dicarboxylic acid or polycarboxylic acid which suffers a weight loss of 50% or more with elimination of gaseous decomposition products on heating to from 130 to 300.degree. C., and simultaneously cooling and molding the melt.

REFERENCES:
patent: 3277029 (1966-10-01), Chadwick et al.
patent: 4588754 (1986-05-01), Liu
patent: 4810570 (1989-03-01), Rutteu et al.
patent: 4943594 (1990-07-01), Ezawa et al.
patent: 4978692 (1990-12-01), Ezawa et al.

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