Patent ID: 6479567
Filing Date: 2002-11-12
Classification: B22C

Abstract:
A process for preparing a foundry shape comprising:A. preparing a foundry mix comprising: (1) a major amount of a foundry aggregate; and (2) an effective binding amount of a furan no-bake binder comprising: (a) from about 2 to about 50 parts by weight of a reactive furan resin, (b) from about 10 to about 80 parts of furfuryl alcohol, (c) from about 0.5 to about 10 parts by weight of an activator selected from the group consisting of resorcinol, resorcinol pitch, and bisphenol A tar, (d) from about 2 to about 15 parts by weight of bisphenol A, and (e) from about 2 to about 20 parts of an aromatic polyester, wherein the binder components are by weight are based upon 100 parts of binder;B. introducing the foundry mix prepared by step (A) into a pattern to form a foundry shape; and C. allowing the foundry shape to harden into a workable foundry shape.