Copolymers of ethylene and their use in the preparation of foama

Details Copolymers of ethylene and their use in the preparation of foama Copolymers of ethylene and their use in the preparation of foama

1979-07-09

1981-01-20

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 98, 521141, 521149, 525 62, C08J 902

Patent

active

042463572

ABSTRACT:
A foamable copolymer comprising 40 to 98 percent by weight units of ethylene, 1 to 30 weight percent units of vinyl alcohol, 1 to 30 weight percent units of acrylic acid ester of a secondary or tertiary alcohol, and up to 2 percent by weight of vinyl acetate units is described together with a process for the manufacture thereof. The same is useful in the formation of a foamed mass which is relatively highly cross-linked. The copolymer can be foamed to form a foam by heating the same at 250.degree. to 350.degree. C. for 5 to 60 minutes in the absence of oxygen.

REFERENCES:
patent: 3044970 (1962-07-01), Baumeister et al.
patent: 3760047 (1973-09-01), Gaeth et al.
patent: 4027079 (1977-05-01), McClain et al.
patent: 4119687 (1978-10-01), Resz et al.
patent: 4135026 (1979-01-01), Hoyt et al.
patent: 4151134 (1979-04-01), McClain
patent: 4155893 (1979-05-01), Fujimoto et al.

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