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US 6,662,854 B2Granted
Cold-box foundry binder systems having improved shakeout
AssigneeAshland Inc.
InventorsWayne D. Woodson, H. Randall Shriver
Life of this patent
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Abstract
This invention relates to foundry binder systems, which will cure in the presence of sulfur dioxide and a free radical initiator, comprising (a) an aliphatic epoxy resin; (b) a multifunctional acrylate; and (c) an effective amount of a free radical initiator. The foundry binder systems are used for making foundry mixes. The foundry mixes are used to make foundry shapes (such as cores and molds) which are used to make metal castings, particularly aluminum castings.
Claims9
A foundry binder system, comprising:
- (a) 20 to 70 parts by weight of an aliphatic epoxy resin having an epoxide equivalent weight of about 100 to about 300 selected from the group consisting of epoxy resins represented by the following structural formulae:
- and mixtures thereof, where m is a whole number from 1 to 4, n≧1, and “R” is a predominately aliphatic substituent,
- (b) 10 to 50 parts by weight of a monomeric or polymeric acrylate monomer;
- and
- (c) an effective amount of a peroxide,
- where (a), (b), and (c) are separate components or mixed with another of said components, provided (b) is not mixed with (c), and where said parts by weight are based upon 100 parts of binder.
3 more elements
Dependencies are inferred from the claim text.