Patent ID: 6271284
Filing Date: 2001-08-07
Classification: B22C

Abstract:
A foundry binder system consisting essentially of:(a) from 5 to 80 weight percent of an epoxy resin;(b) from 5 to 80 weight percent of an organic polyisocyanate;(c) from 5 to 75 weight percent of a reactive unsaturated acrylic monomer or polymer; and(d) an effective amount of an oxidizing agent comprising a hydroperoxide,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 where said binder cures by a cold-box process in the presence of a volatile aliphatic amine curing catalyst.