Patent ID: 7723401
Filing Date: 2010-05-25
Classification: B22C

Abstract:
1. A process for preparing a foundry shape comprising: (a) introducing a foundry mix into a pattern to form a foundry shape; and (b) curing said shape with gaseous sulfur dioxide; wherein said foundry mix comprises: (c) from 90 to 99 parts by weight of a foundry aggregate; and a foundry binder comprising: (d) 20 to 70 parts by weight of an epoxy resin; (e) 5 to 50 parts by weight of an acrylate; (f) 3 to 6 parts by weight of an organofunctional silane selected from the group consisting of γ-glycidoxypropyl trimethoxy silane, vinyl trimethoxy silane, γ-isocyanatopropyl triethoxy silane, octyl triethoxy silane, γ-acryloxypropyl trimethoxy silane, and mixtures thereof, (g) an effective amount of a peroxide, provided (d) is not mixed with (g), and where said parts by weight are based upon 100 parts of binder.