Patent ID: 6037389
Filing Date: 2000-03-14
Classification: B22C

Abstract:
A cold-box process for preparing a foundry shape comprising:A. preparing a foundry mix comprising a major amount of a foundry aggregate and an effective bonding amount of a foundry binder comprising:(1) from 5 to 80 weight percent of an epoxy resin;(2) from 5 to 80 weight percent of an organic polyisocyanate;(3) from 5 to 75 weight percent of a reactive acrylic selected from the group consisting of reactive unsaturated acrylic monomers, reactive unsaturated acrylic polymers, and mixtures thereof; and(4) an effective oxidizing amount of an oxidizing agent comprising a hydroperoxide,where (1), (2), (3), and (4) are separate components or are mixed with another of said components, provided (2) or (3) is not mixed with (4), and where said weight percents are based upon the total weight of (1), (2), (3), and (4);B. introducing the foundry mix obtained from step (a) into a pattern to form an uncured foundry shape;C. curing the uncured foundry shape obtained by step B with a volatile amine curing catalyst to become self-supporting.