Process for the production of hard plastic foams using a polyvin

Details Process for the production of hard plastic foams using a polyvin Process for the production of hard plastic foams using a polyvin

1978-09-11

1979-12-25

Turer, Richard B.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

2041592, 521 75, 521 92, 521134, 521140, C08F 800

Patent

active

041804473

ABSTRACT:
A process for the production of hard plastic foams, using a polyvinylchloride base, from a mixture of polyvinylchloride, at least one temporary softener and at least one expansion agent, wherein the mixture is heated, cooled and expanded. A polymerizable ethylenically unsaturated monomer having at least one double linkage is used as the softener. The polymerization of such monomer is carried out after complete expansion by means of ionizing rays.

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patent: 3714083 (1973-01-01), Nakayama et al.
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patent: 3817851 (1974-06-01), Atchison et al.
patent: 3852177 (1974-12-01), Atchison et al.
patent: 3998715 (1976-12-01), Bohm et al.

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