High surface area magnesia as hardener for phenolic resins

Details High surface area magnesia as hardener for phenolic resins High surface area magnesia as hardener for phenolic resins

1991-04-04

1992-09-08

Kight, III, John

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523146, 525480, 525501, 525503, 528129, 528161, B22C 0122

Patent

active

051458870

ABSTRACT:
There are disclosed methods and compositions for room temperature hardening of phenolic resole resin refractory compositions containing a magnesium oxide hardening agent alone or together with an organic ester. The resin is a low viscosity, low molecular weight resin having a high free phenol content. The magnesium hardening agent has a surface area of at least 20 square meters per gram. The compositions provide adequate working times and room temperature hardening within 24 hours.

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patent: 4831067 (1989-05-01), Lemon et al.
patent: 4939188 (1990-07-01), Gerber
patent: 5043412 (1991-08-01), Chandramouli et al.
Sax, N. and Lewis R., eds., Hawley's Condensed Chemical Dictionary, 11th ed., Van Nostrand Reinhold Co., New York, 1987, p. 718.

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