Method to improve humidity resistance of phenolic urethane foundry binders
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United States of America Patent
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Apr 2, 2002
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N/A
app pub date -
Dec 8, 1999
filing date -
Dec 8, 1999
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Abstract
An embodiment of the present invention provides a method for improving the tensile strength of foundry cores and molds. More particularly, an embodiment of the present invention provides an improved binder for foundry cores and molds that include a fluoride bearing acid in combination with an inorganic silicon compound. Alternately, the improved binder may include a fluoride bearing acid in combination with a boron compound. In a preferred embodiment, a modified part 1 binder component includes a combination of hydrofluoric acid and an inorganic silicon compound.
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