Method of producing crosslinked polypropylene foam

Details Method of producing crosslinked polypropylene foam Method of producing crosslinked polypropylene foam

1980-02-25

1983-01-04

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

20415917, 2041592, 264 53, 264 54, 264DIG16, 521140, B29D 2700

Patent

active

043671853

ABSTRACT:
In producing a crosslinked polypropylene foam, 0.5 to 4 parts by weight of a compound selected from triacrylate and trimethacrylate of aliphatic polyhydric alcohol and a blowing agent are mixed with 100 parts by weight of propylene homopolymer or copolymer. Then, the mixture is shaped under heat, followed by irradiation with an ionizing radiation such that the dose of the radiation absorbed by the shaped mass ranges between 0.1 and 10 Mrad. Finally, the irradiated mass is heated for foaming.

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patent: 3542702 (1970-11-01), Okada et al.
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patent: 3717559 (1973-02-01), Oyama et al.
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patent: 4097319 (1978-06-01), Shimokawa et al.
patent: 4203815 (1980-05-01), Noda et al.
patent: 4213925 (1980-07-01), Kiyono et al.

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