Compositions and process for producing foam plastics

Details Compositions and process for producing foam plastics Compositions and process for producing foam plastics

1989-11-15

1990-07-03

Foelak, Morton

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

4283191, 4283193, 4283166, 521 82, 521 94, 521 95, 521149, 521128, 526300, B32B 900, B32B 326, B32B 2700

Patent

active

049390198

ABSTRACT:
Plastic foam materials having a high degree of structural integrity, cell network uniformity and small cell size are obtained from (meth)acrylic acid and (meth)acrylonitrile by incorporating acrylamide as a comonomer additive within certain ranges of concentration. Incorporation of the latter together with conventional additives normally used in preparing foams from the principal monomers helps to avoid preliminary precipitation during the polymerization process, and the gradients in the polymer microstructure which frequently result and cause internal stresses and weaknesses in the ultimate product.

REFERENCES:
patent: 3513112 (1970-05-01), Kamai et al.
patent: 3553160 (1971-01-01), Schroeder et al.
patent: 3708444 (1973-01-01), Ganzler et al.
patent: 3760047 (1973-09-01), Gaeth et al.
patent: 4139685 (1979-02-01), Schroeder
patent: 4187353 (1980-02-01), Schroeder
patent: 4576971 (1986-03-01), Baumgartner et al.

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