Foundry binder composition

Details Foundry binder composition Foundry binder composition

B - Operations, Transporting

22

C

402/2, 400/7328

B22C 1/22 (2006.01) C08G 18/54 (2006.01) C08K 5/54 (2006.01)

Patent

CA 1190341

ABSTRACT This invention is concerned with foundry binder compositions for alkaline aggregates such as reclaimed sand, Olivia sand, alumina sand, etc., which cure at ambient temperatures. The binder composition is composed of phenolic resins, polyisocyanates and a hydrogen chloride emitting substance upon hydrolysis. Curing of this composition is by gaseous amines. The hydrogen chloride emitting substance on hydrolysis is selected from the following: Image wherein R1, R2, R3 can be selected from: Hydrogen, Chlorine, alkyl, vinyl or alkoxy, or (b) Thionyl chloride, sulfuryl chloride, acid chlorides of sulfur, such as methyl chlorosulfuric acid, ethyl chloroculfuric acid,

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