Process for manufacturing an olefin resin foam

Details Process for manufacturing an olefin resin foam Process for manufacturing an olefin resin foam

1980-04-28

1982-03-02

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264DIG5, 521 91, 521143, 521144, 521149, C08J 900

Patent

active

043178880

ABSTRACT:
Polyolefin foam having small, uniform cell size is prepared (1) by mixing a polyolefin resin with (a) a volatile organic blowing agent and (b) from about 0.1 to about 5 weight percent, based upon the polyolefin resin weight, of a cell control agent (e.g., such as amorphous silica having a pH of from 3.5 to 4.5), said cell control agent being in the form of nonporous microspheres having an average particle size of from about 5 to about 100 m.mu. and (2) by thereafter extrusion-expanding the resultant mixture.

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patent: 3855160 (1974-12-01), Shiotsu et al.
patent: 3939237 (1976-02-01), Naito et al.
patent: 3959197 (1976-05-01), Salyer et al.
patent: 4029612 (1977-06-01), Collington
patent: 4065401 (1977-12-01), Cohnen et al.
"Ency. of Chem. Tech.", Kirk-Othmer, (1966), 2nd Ed., vol. 10, pp. 541-544.

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