Method of producing high molecular weight epoxy resin using an a

Details Method of producing high molecular weight epoxy resin using an a Method of producing high molecular weight epoxy resin using an a

1993-10-18

1995-02-21

Krass, Frederick

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528 89, 528 90, 528 91, 528 92, 528 93, 528 94, 528 95, 528104, 525523, C08G 5962, C08G 5956, C08G 5968

Patent

active

053916875

ABSTRACT:
Ultra high molecular weight epoxy resins are produced in a short time by polymerizing a difunctional epoxy resin having two epoxy group per molecule and a dihydric phenol by heating the difunctional epoxy resin and the dihydric phenol which are present in quantities which provide a ratio of phenolic hydroxyl groups to epoxy groups of from 1:0.9 to 1:1.1, in an amide solvent, in the presence of a polymerization catalyst, and the ultra high molecular weight epoxy resins are linearly polymerized so highly as to have the capability of being formed into films having high strength.

REFERENCES:
patent: 3006892 (1961-10-01), Nikles
patent: 3306872 (1967-02-01), Maycock et al.
patent: 4675373 (1987-06-01), Yatsu et al.
Database WPIL, Week 8929, Derwent Publications Ltd., London, GB; AN 89-211518.

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