Polyurethane based binder system for the manufacture of foundry cores and molds
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United States of America Patent
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app pub date -
Sep 12, 2003
filing date -
Nov 4, 1998
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Abstract
A cold-box process for preparing a foundry shape, e.g. mold or core, that uses a binder comprising a phenolic resin component and an isocyanate component, wherein the phenolic resin component comprises (a) an alkoxy-modified phenolic resole resin and (b) an oxygen-rich polar, organic solvent component, which contains a fatty acid ester.
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