Cured polyester plastic compositions derived from recycled polyu

Details Cured polyester plastic compositions derived from recycled polyu Cured polyester plastic compositions derived from recycled polyu

1993-07-06

1999-01-12

Niland, Patrick D.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

521 40, 521 49, 524555, 525454, 525455, 525460, 528 75, C08G 1828, C08G 1877, C08G 1810, C08G 1867

Patent

active

058591672

ABSTRACT:
Cured, thermoset plastic articles derived from scrap polyurethanes are disclosed. The polyurethane is converted to a liquified mixture containing digested polyurethane and cyclic, unsaturated anhydride. A Lewis acid then catalyzes insertion of the cyclic, unsaturated anhydride into the polyether backbone of the polyurethane to give a liquid, unsaturated resin. The unsaturated resin can cured with a vinyl monomer in the presence of a free-radical initiator to give a cured, thermoset plastic.

REFERENCES:
patent: 2937151 (1960-05-01), Broeck et al.
patent: 3109824 (1963-11-01), Heiss
patent: 3117940 (1964-01-01), McElroy
patent: 4093573 (1978-06-01), Ramlow et al.

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