Alkaline resol phenol-aldehyde resin binder compositions

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

1992-02-11

1993-03-30

Kight, III, John

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523143, 523146, 523147, 524443, 524594, 524596, 525506, C08J 514, B22C 116, B22C 120

Patent

active

051984784

ABSTRACT:
A binder composition for producing articles of bonded particulate material such as foundry moulds or cores comprises an alkaline aqueous solution of a resol phenol-aldehyde resin, an oxyanion which can form a stable complex with the resin, and pyrrolidone or an N-substituted pyrrolidone, and the amount of alkali present in the solution is sufficient to substantially prevent stable complex formation between the resin and 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.

REFERENCES:
Rose, Arthur & Elizabeth, The Condensed Chemical Dictionary, 7th ed. van Nostrand Reinhold Co.

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