Expanded particles of modified polyethylene and foamed articles

Details Expanded particles of modified polyethylene and foamed articles Expanded particles of modified polyethylene and foamed articles

1986-11-04

1988-09-06

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 60, 521134, C08J 918

Patent

active

047693932

ABSTRACT:
Expanded particles obtained by a method including the steps of: providing unexpanded particles formed of a polyethylene resin; impregnating the unexpanded particles with a liquid containing a polymerizable monomer including an acrylic monomer, and optionally a styrenic monomer; subjecting the impregnated polymerizable monomer to polymerization conditions so that at least a portion of the polymerizable monomer is grafted on the polyethylene resin to obtain modified polyethylene particles; and subjecting the modified polyethylene particles to an expansion treatment. Further expansion of the expanded particles within a mold gives a foamed article suitable for use as a consumable pattern in full mold casting.

REFERENCES:
patent: 3743611 (1973-07-01), Muroi et al.
patent: 4168353 (1979-09-01), Kitamori
patent: 4303756 (1981-12-01), Kajimura et al.
patent: 4368218 (1983-01-01), Senda et al.
patent: 4525486 (1985-06-01), Kobayashi et al.

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