Plastic foam material composed of a polyolefin based resin compo

Details Plastic foam material composed of a polyolefin based resin compo Plastic foam material composed of a polyolefin based resin compo

1994-09-30

1996-08-06

Nutter, Nathan M.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 79, 521 80, 521134, 521142, 264477, C08L 4700

Patent

active

055434380

ABSTRACT:
A plastic foam material composed of a polyolefin based resin composition, consists essentially of specified amounts of polypropylene based resins and polyethylene based resins, included from about 20 to about 65 weight percent of a cross linked portion. The cross linked portion consists of from about 55 to about 95 weight percent of a cross linked polypropylene and from about 5 to about 45 weight percent of cross linked polyethylene. The amount of cross-linkage can be determined by a xylene extraction technique. The plastic foam material may further include specified amounts of a cross-linking agent and specified amounts of an organic thermodecomposition foaming agent. The thermodecomposition foaming agent decomposes at sufficiently high temperatures to yield a plastic foam material, which exhibits superior adherence properties and fewer deformities of its surface exemplified by swelling, shrinkage and wrinkling of its surface. A method to produce the plastic foam material is also disclosed.

REFERENCES:
patent: 4252906 (1981-02-01), Hosokawa et al.
patent: 5075162 (1991-12-01), Okubo et al.

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