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US 5,459,178 AGranted
Foundry mixes and their uses
AssigneeAshland Inc.
InventorsPaul S. L. Chan, Satish S. Jhaveri, W. Graham Carpenter
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Abstract
This invention relates to foundry mixes and their uses. The foundry mixes comprise (a) a foundry aggregate, and (b) a foundry binder comprising in admixture; (1) an acetoacetate ester; (2) an .alpha., .beta. ethylenically unsaturated monomer; and (3) a liquid tertiary amine catalyst having a pK value of 12-14. The foundry mixes are used to prepare foundry shapes made from foundry mixes by a no-bake process.
Claims19
A foundry mix comprising in admixture:
- (a) a major amount of foundry aggregate;
- (b) a foundry binder comprising as separate components:
- (1) an acetoacetate ester;
- (2) an .alpha., .beta. ethylenically unsaturated compound;
- and
- (3) a liquid tertiary amine catalyst having a pK value of 12 to 14.
3 more elements
A process for preparing a foundry mix comprising the sequential steps of:
- (a) mixing a tertiary amine catalyst having a pK value of 12 to 14 with a foundry aggregate;
- and
- (b) mixing a blend comprising:
- (1) an acetoacetate ester;
- and
- (2) an .alpha., .beta. ethylenically unsaturated compound with said mixture (a).
3 more elements
A no-bake process for the fabrication of foundry shapes comprising:
- (a) mixing tertiary amine catalyst having a pK value of 12 to 14 with a foundry aggregate;
- and
- (b) mixing a blend comprising:
- (1) an acetoacetate ester;
- and
- (2) an .alpha., .beta. ethylenically unsaturated compound with the mixture (a);
- (c) introducing the foundry mix obtained from step (b) into a pattern;
- (d) allowing the foundry mix to harden in the pattern until it becomes self-supporting;
- and
- (d) thereafter removing the shaped foundry mix of step (d) from the pattern and allowing it to further cure, thereby obtaining a hard, solid, cured foundry shape.
7 more elements
Dependencies are inferred from the claim text.