Cyanoacrylate foundry binders and process
AssigneeAshland Oil, Inc.
InventorHubert P. Kogler
Life of this patent
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Abstract
The invention relates to foundry core or mold compositions containing thermoplastic cyanoacrylate polymer material as binder and to the process for polymerizing the binder so as to set or harden said foundry compositions by eliminating the inhibiting effect of polymerization inhibitors present in the binder.
Claims31
A foundry mix containing sand as the major constituent and a binding amount of up to 10% based on the weight of the sand of a polymerizable binder comprising a cyanoacrylate and a small but effective amount of a polymerizable inhibitor.
A foundry mix according to claim wherein said binder contains propane sultone as an inhibitor.
A foundry process for cold-setting of foundry mixes containing sand and a polymerizable binder comprising a cyanoacrylic acid ester and a small but effective amount of a polymerization inhibitor which process comprises placing said foundry mix in a shaping device or equipment and shaping same, then removing or neutralizing the polymerization inhibitor.
Dependencies are inferred from the claim text.