B - Operations – Transporting – 22 – C
Patent
B - Operations, Transporting
22
C
22/190, 400/7316
B22C 1/22 (2006.01) B22C 1/16 (2006.01) C08G 8/28 (2006.01) C08G 16/02 (2006.01) C08K 3/24 (2006.01) C08K 3/38 (2006.01) C08K 5/54 (2006.01) C08L 61/14 (2006.01)
Patent
CA 1332256
PRODUCTION OF ARTICLES OF BONDED PARTICULATE MATERIAL AND BINDER COMPOSITIONS FOR USE THEREIN 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 and an oxyanion capable of forming a stable complex with the resin, the amount of alkali present in the solution being sufficient to sub- stantially prevent stable complex formation. Bonded articles are produced from mixtures of particulate material and the binder composition by passing carbon dioxide gas through the formed articles whereby the oxyanion forms a stable complex with the resin and the resin is cured. The oxyanion may be for example borate, stannate or aluminate.
585433
Baggett Neil
Barker Sidney Alan
Bradley Martin
de Courcy David Robert
George Raymond Douglas
Foseco International Limited
Gowling Lafleur Henderson Llp
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