Huttenes-albertus Chemische Werke Gesellschaft MIT Beschrankter Haftung

Huttenes-albertus Chemische Werke Gmbh

Wolfgang Seelbach

Robert A Laitar

Marek A Torbus

Milan Knezevic

Nicolas Egeler

Douglas M Trinowski

Jaime Díaz Fernández

Gee Ho Bae

The present invention relates to a mold material mixture for producing moldings for the foundry industry, in particular for producing foundry molds, cores or feeders for the foundry industry, which comprises A) one or more pourable, refractory fillers, B) a binder system comprising i) formaldehyde, a formaldehyde donor and/or precondensates of formaldehyde and ii) an amino acid. The present invention additionally relates to the use of amino acids in a mold material mixture for producing moldings for the foundry industry or for producing moldings for the foundry industry, a process for producing a mold material mixture and a process for producing a molding for the foundry industry.

Amino acid-containing moulding material mixture for production of mouldings for the foundry industry

This invention relates to a resin preparable by reaction of a phenol/formaldehyde novolak with tetraethyl orthosilicate in a mass ratio above 28:1, wherein the phenol of the phenol/formaldehyde novolak is substituted or unsubstituted hydroxybenzene or a mixture of two or more such phenols, and to a particulate material coated with said resin. Said particles can be used e.g. in the shell molding process for the production of shell molds and shell cores; and as proppants for use in the hydraulic fracturing process.

Silicic ester modified phenol/formaldehyde novolaks and their use for the production of resin coated substrates

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Korschenbroich, Germany

Wolfgang Seelbach