Rigid thermoplastic resin foam and process for preparation there

Details Rigid thermoplastic resin foam and process for preparation there Rigid thermoplastic resin foam and process for preparation there

1985-09-25

1986-04-29

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264 55, 264DIG13, 264DIG15, 521 50, 521 58, 521146, 521147, 521918, B29C 6722, C08J 936, C08J 938

Patent

active

045856052

ABSTRACT:
The foam of the present invention, which has a multi-cellular structure including many wrinkles having one end in the boundary portion where at least three cells are adjacent to one another and extending toward the central portion of the cell wall, is a rigid thermoplastic resin foam having an ultra-low density, a high sound-insulating property, a high heat-insulating property and a high flexibility, and it is suitable for adaption for building construction. The process of the present invention is to provide the aforesaid foam of the present invention by subjecting the foam of a rigid thermoplastic resin to expansion, contraction and aging.

REFERENCES:
patent: 4510268 (1985-04-01), Tonokawa et al.
"Manufacture and Properties of Super-Light Polystyrene Foam", by G. Shuur, British Plastics, Apr., 1965, pp. 219-223.

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