Expandable resin composition

Details Expandable resin composition Expandable resin composition

1996-07-11

1997-07-01

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 50, 264 54, 521 79, 521134, C08J 910, C08J 912

Patent

active

056439695

ABSTRACT:
A process for preparing an expandable resin composition comprising the following steps:
(a) admixing, at a temperature in the range of about 120 to about 130 degrees C., the following components:
(i) 100 parts by weight of a high pressure, low density homopolymer of ethylene;
(ii) about 30 to about 200 parts by weight of a high density polyethylene having a melting point higher than the above mixing temperature;
(iii) about 2 to about 50 parts by weight of polypropylene having a DSC melting point of not less than about 140 degrees C.; and
(iv) about 0.1 to about 2 parts by weight of a silane coupling agent; and
(b) admixing, at a temperature in the range of about 120 to about 130 degrees C., 100 parts by weight of the mixture produced in step (a) with 0.5 to 3 parts by weight of one or more chemical blowing agents having a decomposition temperature higher than the above mixing temperature.

REFERENCES:
patent: 5180754 (1993-01-01), Morita et al.
patent: 5346926 (1994-09-01), Sakamoto et al.

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