Foundry core mix

Details Foundry core mix Foundry core mix

C - Chemistry, Metallurgy

08

L

400/7030, 400/73

C08L 75/04 (2006.01) B22C 1/22 (2006.01) C08K 5/04 (2006.01) C08K 5/06 (2006.01) C08K 7/00 (2006.01)

Patent

CA 1075845

ABSTRACT OF THE DISCLOSURE The present invention as disclosed provides a foundry core mix adapted to being cured by a catalyst comprising a foundry aggregate and about 1% to 5% by weight of the aggregate of a binder comprising in admixture: (a) a curable resin base of the group cosisting of epoxy resins, polyester, resins, alkyd resins and squeous phenol-formaldehyda resins, (b) a reactive liquid polyisocyanate in the amount of 80% to 125% by weight of the resin base, and (c) a solvant of the formula Image in which R1 and R2 are the same or different hydrocarbon radicals of three to six carbon atoms and R3 and R4 are the same or different hydrogen, methyl, ethyl or phenyl radicals, in an amount of from about 10% to 40% by weight of the binder, or of about 35% by weight of the polysocynate component. The abouve composition is suitable for use in cold box, no-bake, and rapid no-bake processes.

264847

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