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US 6,286,585 B1Granted
Sleeve mixes containing stabilized microspheres and their use in making riser sleeves
AssigneeAshland Inc.
InventorsHelena Twardowska, Ronald C. Aufderheide
Life of this patent
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Abstract
This invention relates to exothermic and insulating sleeve mixes comprising (1) a sleeve composition comprising stabilized hollow aluminosilicate microspheres, and (2) a chemically reactive binder. Sleeves are formed from the sleeve mix and are cured in the presence of a catalyst by the cold-box or no-bake curing process. The invention also relates to a process for casting metal parts using a casting assembly where the sleeves are a component of the casting assembly. Additionally, the invention relates to the metal parts produced by the casting process.
Claims9
A sleeve mix comprising:
- (A) a sleeve composition comprising stabilized hollow aluminosilicate microspheres having an alumina content of less than 38 weight percent alumina based upon the weight of the microspheres, and
- (B) an effective amount of an organic polymeric binder.
Dependencies are inferred from the claim text.