Process for the production of fine-cell polyolefin foams

Details Process for the production of fine-cell polyolefin foams Process for the production of fine-cell polyolefin foams

1974-10-08

1976-06-29

Foelak, Morton

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25H, C08J 906, C08J 910

Patent

active

039666514

ABSTRACT:
A process for the production of a fine-celled foam from a mixture of a polyolefin, a peroxide capable of peroxidically cross-linking the polyolefin and a principal blowing agent having a decomposition point or decomposition range above about 190.degree.C, wherein a further blowing agent, an auxiliary blowing agent, having a decomposition range of from 130.degree. to about 190.degree.C is added in a quantity of from 0.1 to 1.5 percent by weight, based on said principal blowing agent, to said mixture, the mixture thus obtained is worked up under such conditions that neither cross-linking nor appreciable foaming takes place to a moulding, which is subsequently, cross-linked and foamed by heating to temperatures above 190.degree.C.

REFERENCES:
patent: 3098831 (1963-07-01), Carr
patent: 3278466 (1966-10-01), Cram et al.
patent: 3645930 (1972-02-01), Normanton
patent: 3645931 (1975-02-01), Normanton
patent: 3876566 (1975-04-01), Koshak et al.
patent: 3882209 (1975-05-01), Yanagisawa et al.

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