Process for producing foamable polyolefin particles

Details Process for producing foamable polyolefin particles Process for producing foamable polyolefin particles

1983-05-16

1984-01-31

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264DIG5, 521 56, 521910, C08J 918

Patent

active

044290594

ABSTRACT:
The present invention is directed to a process for producing foamable polyolefin particles comprising adding a mixture of 3 to 15 parts by weight of a blowing agent and 0.5 to 5 parts by weight of a blowing aid to 100 parts by weight of polyolefin particles maintained in a fluid state. The addition of the mixture of blowing agent and blowing aid is conducted under substantially anhydrous conditions, which result in the blowing agent being present in the particles in a gas phase and not a liquid phase. Polyolefin particles comprise polyolefin resin with vinylaromatic resin chemically bonded thereto.

REFERENCES:
patent: 3743611 (1973-07-01), Muroi et al.
patent: 3959189 (1976-05-01), Kitamori
patent: 4168353 (1979-09-01), Kitamori
patent: 4303756 (1981-12-01), Kajimura

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