Construction material obtained from recycled polyolefins contain

Details Construction material obtained from recycled polyolefins contain Construction material obtained from recycled polyolefins contain

1988-08-11

1991-07-09

Ivy, C. Warren

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

Synthetic resins

Process of treating scrap or waste product containing solid...

521134, 521140, 521 91, 521 92, 524504, 524522, C08J 1100, C08L 2304, C08L 3500, C08L 3302

Patent

active

050306626

ABSTRACT:
Construction materials prepared from recycled polymeric material containing primarily polyolefins such as high density polyethylene, ultra high molecular weight polyethylene, low density polyethylene, linear low density polyethylene, and polypropylene homopolymers and copolymers are useful for profiled extruded forms such as fence posts, door frames, rails, railway sleepers, and other applications where lumber is conventionally employed. The compositions of the invention contain, in addition to the mixed plastic matrix, reactive compatibilizers, impact modifiers, and reinforcing agents. When desired, foaming agents may also be employed. The recycled mixed plastic materials have been subject to at least one high temperature processing step when used in their original application. Such plastics differ in physical and chemical composition from virgin material.

REFERENCES:
patent: 3957919 (1976-05-01), von Bodungen
patent: 4397982 (1983-08-01), Boutni
patent: 4430468 (1984-02-01), Schumacher
patent: 4446267 (1984-05-01), Lundberg
patent: 4677142 (1987-06-01), Solc
patent: 4696967 (1987-09-01), Shedd
patent: 4822653 (1989-04-01), Kauffman
A. Spaak, "Use of Secondary Recycled Plastics", a paper presented at the Plastics Institute of America, meeting on Oct. 6-7, 1988 at the Sheraton Hotel, Newark, N.J.

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