Binder composition for foundry sand molds and cores

Details Binder composition for foundry sand molds and cores Binder composition for foundry sand molds and cores

B - Operations, Transporting

22

C

402/157, 402/31

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

Patent

CA 1176785

ABSTRACT OF THE DISCLOSURE A novel binder composition for foundry sand molds or cores comprises (a) an organic polyisocyanate compound and (b) a certain polyol compound selected from a formaldehyde-modified bisphenol and a formaldehyde- modified cyclic ketone, or a partially alkoxylated derivatives of the polyol compound, the ratio of the com- ponent (a) to the component (b) being in the specific range.

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