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US 11,839,913 B2Granted
Binder systems
AssigneeImerys USA, Inc.
InventorVictor S. Lafay
Life of this patent
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Abstract
The present disclosure includes binder systems for making foundry articles. The binder systems may comprise a humic substance-containing component that comprise lignite, an isocyanate component, and a catalyst component. The binder systems may be mixed with an aggregate (e.g., sand) for making foundry articles such as molds and cores. Also disclosed herein are methods of making foundry articles using the binder systems.
Claims21
A binder system comprising:
- a first component comprising lignite, at least one silicate mineral, and at least one polyol, wherein the at least one silicate mineral comprises 5-25% by weight silica with respect to the total weight of the first component;
- a second component comprising at least one isocyanate;
- and
- a third component comprising at least one catalyst.
1 more element
Dependencies are inferred from the claim text.