Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1985-01-18
1985-09-10
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521134, 521189, 525189, 525190, C08J 906
Patent
active
045407193
ABSTRACT:
A blend of an E/X/Y copolymer, where E is ethylene, X is a vinyl ester, and Y is carbon monoxide or sulfur dioxide, with a polymer of vinyl halide or vinylidene halide is foamed and cured by dispersing in the blend a blowing agent and sulfur or a sulfur-releasing agent and heating the blend containing those additives at 100.degree.-180.degree. C. for a sufficient time to produce curing and foaming. This process can be run either continuously or batchwise in conventional equipment under conventional conditions in the presence of air. Plasticizers and other materials which often interfere with peroxide cures can be present in the process of this invention. The foamed and cured products have excellent physical properties and ozone resistance.
REFERENCES:
patent: 4172939 (1979-10-01), Hoh
patent: 4370423 (1983-01-01), Rys-Sikora
patent: 4391922 (1983-07-01), Harrell
patent: 4391923 (1983-07-01), Rys-Sikora
patent: 4394459 (1983-07-01), Rys-Sikora
patent: 4434253 (1984-02-01), Rys-Sikora
patent: 4480054 (1984-10-01), Enderle
E. I. Du Pont de Nemours and Company
Foelak Morton
Steyermark P. R.
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