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US 5,030,662 AGranted
Construction material obtained from recycled polyolefins containing other polymers
AssigneePolymerix, Inc.
InventorAsis K. Banerjie
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AssigneePolymerix, Inc.
InventorAsis K. Banerjie
Estimating the term…
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.
A mixed plastic composition which is extrudable through a profile die into a structural article which comprises:
A structural article of a mixed plastic material which has been formed by extrusion through a profile die which comprises:
Dependencies are inferred from the claim text.