Production of foam

Details Production of foam Production of foam

Filed on

1982-10-08

Date issued

1984-06-26

Examiner

Foelak, Morton

Patent Class

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

SubClass

Synthetic resins

SubSubClass

Cellular products or processes of preparing a cellular...

Other Related Categories

264 53, 264 54, 521 82, 521 88, 521 94, 521143, 521154, C08J 906, C08J 914

Type

Patent

Status

active

Patent number

044567049

Description

ABSTRACT:
A method for producing cross-linked polyethylene resin foams which comprises mixing a polyolefin resin, a blowing agent and, optionally, a surface active agent containing hydroxyl groups or an acid amide compound under pressure, said polyolefin resin containing a cross-linkable ethylene polymer having on the side chains thereof silyl groups which effect cross-linking upon contact with water; extruding the mixture into a low pressure zone where the extrudate is allowed to expand; and bringing the expanded extrudate into contact with a silanol condensing catalyst so that the expanded extrudate is cross-linked on contact with water.

REFERENCES:
patent: 4160072 (1979-07-01), Shinkai et al.
patent: 4252906 (1981-02-01), Hosokawa et al.
patent: 4333898 (1982-06-01), Schmidtchen

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