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US 6,271,284 B1Granted
Sleeves, their preparation, and use
AssigneeAshland Inc.
InventorsJames J. Archibald, Matthew S. Sheridan
Life of this patent
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Abstract
The subject invention relates to a foundry binder system which cures in the presence of a volatile amine curing catalyst comprising (a) an epoxy resin,(b) an organic polyisocyanate, (c) a reactive unsaturated acrylic monomer or polymer, and (d) an oxidizing agent. The foundry binders are used for making foundry mixes. The foundry mixes are used to make foundry shapes which are used to make metal castings.
Claims11
A foundry binder system consisting essentially of:
- (a) from 5 to 80 weight percent of an epoxy resin;
- (b) from 5 to 80 weight percent of an organic polyisocyanate;
- (c) from 5 to 75 weight percent of a reactive unsaturated acrylic monomer or polymer;
- and
- (d) an effective amount of an oxidizing agent comprising a hydroperoxide,
- where (a), (b), (c), and (d) are separate components or mixed with another of said components, provided (b) or (c) is not mixed with (d),
- where said weight percents are based upon the total weight of (a), (b), (c), and (d),
- and where said binder cures by a cold-box process in the presence of a volatile aliphatic amine curing catalyst.
5 more elements
Dependencies are inferred from the claim text.