Use of branched alkane diol carboxylic acid diesters in polyurethane-based foundry binders

Use of branched alkane diol carboxylic acid diesters in polyurethane-based foundry binders

The invention relates to a molding material mixture for production of molded products for the foundry industry, comprising at least one fire-resistant base molding material and a polyurethane-based binder system comprising a polyisocyanate component and a polyol component. According to the invention...

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Hauptverfasser: PRIEBE CHRISTIAN, KOCH DIETHER
Format: Patent
Sprache:eng
Schlagworte:
CASTING
FOUNDRY MOULDING
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
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creator PRIEBE CHRISTIAN
KOCH DIETHER
description The invention relates to a molding material mixture for production of molded products for the foundry industry, comprising at least one fire-resistant base molding material and a polyurethane-based binder system comprising a polyisocyanate component and a polyol component. According to the invention, the polyurethane-based binder system comprises a portion of a carboxylic acid diester of a branched alkane diol, said portion being at least 3 weight-%, and a portion of aromatic solvent of less than 10 weight-% of the binder system. A preferable carboxylic acid diester is 2,2,4-trimethyl-1,3-pentandiol-diisobutyrate. The molded products produced from the molding material mixture for the foundry industry are characterized by a high strength and a lower generation of fumes and smoke during pouring.
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subjects CASTING
FOUNDRY MOULDING
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
title Use of branched alkane diol carboxylic acid diesters in polyurethane-based foundry binders
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