Binder containing substituted benzenes and naphthalenes for producing cores and molds for metal casting, mold material mixture, and method
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United States of America Patent
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Apr 7, 2015
Grant Date -
Nov 14, 2013
app pub date -
Sep 30, 2011
filing date -
Sep 30, 2010
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Abstract
A binder for mold material mixtures is a four-component material. It contains at least one phenolic resin component, at least one isocyanate component, at least one alkyl/alkenyl benzene and at least one dialkylated and/or dialkenylated naphthalene. The phenolic resin component acts as the polyol component and contains phenolic resin obtainable from the reaction between a phenol compound and an aldehyde compound. The isocyanate component contains at least one polyisocyanate with at least two NCO groups per molecule. The alkyl/alkenyl benzene has a boiling point above 250° C. The dialkylated and/or dialkenylated naphthalene has a boiling point above 270° C.
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