BINDER SYSTEM BASED ON POLYURETHANE FOR PRODUCING CORES AND CASTING MOLDS USING CYCLIC FORMALS, MOLDING MATERIAL MIXTURE, AND METHOD

A binder system for a molding mixture has at least one phenolic resin component, at least one isocyanate component and at least one solvent component, where the at least one solvent component is a cyclic formal, also known as a cyclic formaldehyde, with or without additional solvents. The phenolic r...

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Bibliographische Detailangaben
Hauptverfasser:	PRIEBE CHRISTIAN, KOCH DIETHER
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CASTING CHEMISTRY COMPOSITIONS BASED THEREON FOUNDRY MOULDING GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS POWDER METALLURGY THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING-UP
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Beschreibung
Zusammenfassung:	A binder system for a molding mixture has at least one phenolic resin component, at least one isocyanate component and at least one solvent component, where the at least one solvent component is a cyclic formal, also known as a cyclic formaldehyde, with or without additional solvents. The phenolic resin component is prepared by reacting a phenol compound with an aldehyde compound. The isocyanate component has at least polyisocyanate that has at least two isocyanate groups per molecule. In the molding mixture, the binder is combined with a refractory molding material.