DIALDEHYDE MODIFIED, PHEOLIC FOUNDRY SAND CORE BINDER RESINS, PROCESSES FOR MAKING SAME, AND PROCESS FOR PREPARING FOUNDRY CORES AND MOLDS EMPLOYING SAME

DIALDEHYDE MODIFIED, PHEOLIC FOUNDRY SAND CORE BINDER RESINS, PROCESSES FOR MAKING SAME, AND PROCESS FOR PREPARING FOUNDRY CORES AND MOLDS EMPLOYING SAME

A PHENOLIC RESOLE RESIN FOR USE AS A FOUNDRY BINDER WHICH HAS BEEN INTERNALLY MODIFIED TO REDUCE ITS HOT STRENGTH AND THEREBY ENHANCE ITS SHAKEOUT PROPERTY IS DISCLOSED. THE RESIN IS THE REACTION PRODUCT OF A PHENOLIC COMPOUND; A DIALDEHYDE; AND FORMALDEHDYDE. A PROCESS OF PREPARING SUCH RESIN IS AL...

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Bibliographische Detailangaben
Hauptverfasser: MR.DAVID R. ARMBRUSTER, CALVIN K. JOHNSON, MR.SUDHIR K. TRIKHA
Format: Patent
Sprache:eng
Schlagworte:
CASTING
CHEMISTRY
COMPOSITIONS BASED THEREON
FOUNDRY MOULDING
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
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Zusammenfassung:A PHENOLIC RESOLE RESIN FOR USE AS A FOUNDRY BINDER WHICH HAS BEEN INTERNALLY MODIFIED TO REDUCE ITS HOT STRENGTH AND THEREBY ENHANCE ITS SHAKEOUT PROPERTY IS DISCLOSED. THE RESIN IS THE REACTION PRODUCT OF A PHENOLIC COMPOUND; A DIALDEHYDE; AND FORMALDEHDYDE. A PROCESS OF PREPARING SUCH RESIN IS ALSO DISCLOSED, COMPRISING FIRST REACTING THE PHENOLIC COMPOUND AND THE DIALDEHYDE, AND SUBSEQUENTLY REACTING THE PRODUCT WITH THE FORMALDEHYDE. THE RESIN MAY BE, IN A PREFERRED EMBODIMENT, AN ESTER-CURABLE ALKALINE PHENOLIC RESIN. ALSO DISCLOSED ARE A RAW BATCH FORMULATION INCLUDING THE RESIN OF THE INVENTION, AND FOUNDRY ARTICLES PREPARED THEREFROM.