HALLOYSITE TUBES IN ESTER-CURED PHENOLIC BONDED FOUNDRY SHAPES
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United States of America Patent
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Issued Date -
Nov 10, 2022
app pub date -
May 10, 2021
filing date -
May 10, 2021
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Abstract
A no bake process is provided for preparing a foundry shape. A major amount of an appropriate foundry aggregate, especially a sand that has been mechanically-reclaimed, is mixed with an amount of halloysite tubes. A binder system, especially a water-based binder, such as an aqueous alkaline phenolic resole resin, is added to the mixed aggregate and halloysite, and a liquid co-reactant for curing the binder is also added. By intimately mixing the components, a foundry molding compound is formed and it can be placed into a mold or patter to cure into a foundry shape. When removed from the mold or pattern, the foundry shape can be used to cast molten metal.
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