Expandable polymeric composition and method

Details Expandable polymeric composition and method Expandable polymeric composition and method

1986-04-07

1987-04-28

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264 55, 264DIG5, 521 79, 521 81, 521 88, 521 98, 521139, 521910, 521 85, C08J 914, C08J 922

Patent

active

046613021

ABSTRACT:
An expandable alkenyl aromatic polymer composition and methods of preparation are provided. The composition is admixed with a volatile blowing agent and an expansion aid which includes a polyphenylene ether. The composition may be extruded and then expanded by exposure to steam or hot air or may be impregnated with blowing agent and then expanded.

REFERENCES:
patent: 4065401 (1977-12-01), Cohnen et al.
patent: 4097425 (1978-06-01), Niznik
patent: 4128689 (1978-12-01), Heaps
patent: 4360486 (1982-11-01), Di Biasi et al.
patent: 4579710 (1986-04-01), Krutchen et al.
patent: 4579873 (1986-04-01), Krutchen et al.

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