Molded epoxy resin product containing acids from oxidation of ca

Details Molded epoxy resin product containing acids from oxidation of ca Molded epoxy resin product containing acids from oxidation of ca

1980-11-24

1982-03-16

Nielsen, Earl A.

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

Synthetic resins

From coal or bituminous material, extract or derivative...

525507, 528365, C08G 5942

Patent

active

043202233

ABSTRACT:
Novel, 1,2-Epoxy Resin products using unique polycyclic, aromatic, polycarboxylic acid products as crosslinking agents display satisfactory electrical properties and good Barcol hardness values. The process for preparing these novel resin products involves admixing: a 1,2-epoxy resin containing on the average more than one 1,2-epoxy groups per molecule and the acid product derived from the nitric acid oxidation of naturally occurring solid carbonaceous material along with a suitable accelerator. The mixture is then subjected to a precure step which involves heating at temperatures between 50.degree. and 150.degree. C. for from about five minutes to about six hours. The mixture is thereafter subjected to suitable molding conditions.

REFERENCES:
patent: 3222280 (1965-12-01), Wolfram et al.
patent: 3304344 (1967-02-01), Szalowski
patent: 4101469 (1978-07-01), Schulz et al.
patent: 4122050 (1978-10-01), Schulz et al.

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