Ester hardeners for phenolic resin binder systems
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United States of America Patent
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Jan 29, 1991
Grant Date -
N/A
app pub date -
Apr 27, 1989
filing date -
Apr 27, 1989
priority date (Note) -
Expired
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Abstract
A hardener composition for alkaline phenolic resole resin binders which comprises a solution of a benzylic ether resole resin in an ester. Binder compositons comprising this hardener with alkaline phenolic resole resins are further provided as are foundry molding compositions and methods for making foundry cores and molds using the molding compositions.
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