Patent ID: 6342543
Filing Date: 2002-01-29
Classification: B22C,C08G

Abstract:
A foundry binder system comprising:(a) from 1 to 70 weight percent of compound having at least two active methylene hydrogen atoms selected from the group consisting of monofunctional and multifunctional acetoacetates, diketones, malonates, acetoacetamides, cyanoacetates, and mixtures thereof; (b) from 10 to 70 weight percent of an organic polyisocyanate; (c) from 5 to 70 weight percent of a reactive unsaturated acrylic monomer, polymer, and mixtures thereof; and (d) from 5 to 70 weight percent of an oxidizing agent, where (a), (b), (c), and (d) are separate components or mixed with another of said components, provided (b) or (c) is not mixed with (d), where said weight percents are based upon the total weight of (a), (b), (c), and (d), and which cures in the presence of a volatile amine curing catalyst.