Alkaline resol phenol-aldehyde resin binder composition

Details Alkaline resol phenol-aldehyde resin binder composition Alkaline resol phenol-aldehyde resin binder composition

1993-01-04

1994-03-15

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, 523147, 528138, C08J 514, B22C 116

Patent

active

052946487

ABSTRACT:
A binder composition for producing articles of bonded particulate material such as foundry molds or core comprises an alkaline aqueous solution of a resol phenol-aldehyde resin, an oxyanion which can form a stable complex with the resin, and an ethylene glycol monoalkyl ether. The binder composition has an alkali to phenol molar ratio of from 1.5:1 to 2.5:1 and the amount of alkali present in the solution is sufficient to substantially prevent stable complex formation between the resin ad the oxyanion. Bonded articles are produced by passing carbon dioxide gas through articles formed from a mixture of particulate material and the binder composition so as to produce stable complex formation and curing of the resin.

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patent: 5162393 (1992-11-01), Griffin et al.
Rose, Aurthur & Elizabeth, The Condensed Chemical Dictionary, 7th Ed, Van Nostrand Reinholl Co., pp. 393-394 1969.

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