Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From coal or bituminous material – extract or derivative...
Patent
1981-02-09
1983-05-03
Griffin, Ronald W.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From coal or bituminous material, extract or derivative...
264250, 264336, 264DIG59, 264DIG64, 264DIG65, 528274, 528281, 528282, 528286, 528292, C08G 6312
Patent
active
043821375
ABSTRACT:
Novel resin products produced by reacting unique polycyclic, aromatic, polycarboxylic acid products with low molecular weight polyols display satisfactory toughness properties and good Barcol hardness values. The process for preparing these novel resin products first involves preparing an intimate, finely divided mixture comprising the acid product derived from the nitric acid oxidation of naturally occurring solid carbonaceous material, a roughly equivalent amount of a liquid polyol, and a suitable acid catalyst. The mixture is then subjected to a precure step which involves heating at temperatures between 80.degree. and 150.degree. C. for from about fifteen minutes to about four hours. The precured mixture may thereafter be subjected to suitable molding conditions at a temperature below about 220.degree. C.
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Barie, Jr. Walter P.
Eurich James T.
Schulz Johann G.
Carducci Joseph J.
Griffin Ronald W.
Gulf Research & Development Company
Keith Deane E.
Stine Forrest D.
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