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US 6,604,567 B1Granted
Free radically cured cold-box binders containing an alkyl silicate
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 resin; (b) an acrylate; (c) an alkyl silicate; 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, particularly ferrous castings.
Claims15
A foundry binder system, which will cure in the presence of sulfur dioxide and a free radical initiator, comprising:
- (a) 20 to 70 parts by weight of an epoxy resin;
- (b) 5 to 50 parts by weight of an acrylate;
- (c) 1 to 20 of an alkyl silicate;
- and
- (d) an effective amount of a peroxide,
- wherein (a), (b), and (c) are separate components or mixed with another of said components, provided (b) is not mixed with (d), and where said parts by weight are based upon 100 parts of binder.
3 more elements
Dependencies are inferred from the claim text.