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US 6,602,931 B2Granted
Polyurethane-forming binders
AssigneeAshland Inc.
InventorsChia-hung Chen, Jorg Kroker
Life of this patent
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Abstract
This invention relates to a polyurethane-forming no-bake foundry binder comprising a (a) polyol component comprising (1) a polyol selected from the group consisting of polyether polyols, aminopolyols, polyester polyols, and mixtures thereof, and (2) a hydrogenfluoride of aminosilanol, (b) a polyisocyanate component, and optionally (c) a liquid tertiary amine catalyst component. Foundry mixes are prepared by mixing the binder system with a foundry aggregate by a no-bake process. The resulting foundry shapes are used to cast metal parts from ferrous and non-ferrous metals.
Claims17
A no-bake foundry binder system comprising:
- (a) polyol component comprising,
- (1) a polyol selected from the group consisting of polyether polyols, aminopolyols, polyester polyols, and mixtures thereof, and
- (2) a hydrogenfluoride of aminosilanol, and
- (b) a polyisocyanate component,
- wherein the amount of hydrogenfluoride of an aminosilanol is from 0.1 to 10 weight percent, based upon the weight percent of component (a).
2 more elements
Dependencies are inferred from the claim text.