URETHANE-TYPE CURABLE ORGANIC BINDER FOR MOLD, AND MOLDING SAND COMPOSITION AND MOLD OBTAINED USING SAME

摘要

Provided are: an organic binder for a mold, said organic binder being capable of prolonging the pot life of a molding sand composition advantageously without accompanying uneven curing, a lowering in mold strength, or an increase in the amount of a catalyst used; a molding sand composition which is obtained using the organic binder and which exhibits a prolonged pot life; and a mold produced from the molding sand composition through gas hardening. A urethane-type curable organic binder which is for use in the production of a urethane-based mold and which comprises a polyol compound and a polyisocyanate compound and further contains an alkoxysilyl-containing ketimine compound represented by a prescribed general formula.