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US 6,686,402 B2Granted
Cold-box foundry binder systems
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 epoxy novolac resin; (b) preferably a bisphenol F; (c) an acrylate; and (d) 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.
Claims12
A foundry mix comprising:
- (a) a major amount of a foundry aggregate;
- (b) an effective binding amount of a binder system, which will cure in the presence of sulfur dioxide and a free radical initiator, comprising:
- (1) 20 to 70 parts by weight of an epoxy novolac resin;
- (2) 20 to 40 parts by weight of a monomeric or polymeric acrylate;
- and
- (3) an effective amount of a free radical initiator,
- where (1), (2), and (3) are separate components or mixed with another of said components, provided (3) is not mixed with (2), where said parts by weight are based upon 100 parts of binder system, and wherein said binder system does not contain any bisphenol A epoxy resin.
4 more elements
A foundry mix comprising:
- (a) a major amount of a foundry aggregate;
- (b) an effective binding amount of a binder system, which will cure in the presence of sulfur dioxide and a free radical initiator, comprising:
- (1) 20 to 70 parts by weight of an epoxy novolac resin;
- (2) 20 to 40 parts by weight of a monomeric or polymeric acrylate;
- (3) 1 to 35 parts by weight of bisphenol F;
- and
- (4) an effective amount of a free radical initiator,
- where (1), (2), (3), and (4) are separate components or mixed with another of said components, provided (4) is not mixed with (2), and where said parts by weight are based upon 100 parts of binder system.
5 more elements
Dependencies are inferred from the claim text.