Binders for foundry mixes comprising polyisocyanate and styrene-allyl alcohol copolymer or alkylene oxide derivative thereof

摘要

A foundry core composition comprising a foundry aggregate, a resin base such as styrene-allyl alcohol copolymer or alkylene oxide derivative thereof, a polyisocyanate, and a catalyst therefor; the compositions being suitable for use in cold box, no-bake, and rapid no-bake processes.