Methods of reducing polystyrene foams using dibasic esters...

Details Methods of reducing polystyrene foams using dibasic esters... Methods of reducing polystyrene foams using dibasic esters...

2008-01-22

2008-01-22

Cain, Edward J. (Department: 1714)

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

Synthetic resins

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

C521S047000

Reexamination Certificate

active

07321003

ABSTRACT:
The present invention is directed to novel polystyrene foam reduction recycling compositions and methods that solve the volume problem of recycling polystyrene foam materials while simultaneously allowing the easy and inexpensive shipment of the foamed materials after reduction in volume by use of one or more dibasic ester compositions in combination with one or more low heat based mechanical extruders. The methods of the present invention are applicable to all types of expanded or foamed polystyrene materials known to those of skill in the art.

REFERENCES:
patent: 5232954 (1993-08-01), Peters
patent: 5629352 (1997-05-01), Shiino et al.
patent: 6403661 (2002-06-01), Usui et al.

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