Urethane binder compositions for no bake and cold box...

Details Urethane binder compositions for no bake and cold box... Urethane binder compositions for no bake and cold box...

C - Chemistry, Metallurgy

08

G

402/147, 22/160,

C08G 18/32 (2006.01) B22C 1/22 (2006.01) C08G 8/28 (2006.01) C08G 18/54 (2006.01) C08G 18/80 (2006.01)

Patent

CA 1160796

ABSTRACT Foundry cores and molds for casting metals are prepared by forming a binder comprising a polyol; an isocyanato urethane polymer and a urethane catalyst. The foundry cores and molds of this invention are formed by pro- cesses known in the industry as the "cold box" process and the no-bake process The binder is especially useful for casting non-ferrous metals, for example, the casting of a1uminum, magnesium and other lightweight metals. The cores ant molds produced for casting aluminum and other lightweight metals is exhibit excellent shakeout while retaining other desirable core and mold properties.

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