Huttenes-albertus Chemische Werke Gmbh

Ha-international LLC

Douglas M Trinowski

Michael J Walker

Robert A Laitar

Marek A Torbus

Milan Knezevic

Nicolas Egeler

Wolfgang Seelbach

Gee Ho Bae

'Lost' cores for use high pressure die casting, the cores preferably having a water-soluble synthetic ceramic aggregate having an appropriate strength and tolerance for various casting pressures and temperatures, an inorganic binder having sodium silicate, an additive having particulate amorphous silicon dioxide, and a refractory coating, wherein the cores have the capacity to be removed from a casting by dissolution with water.

Compositions and methods for foundry cores in high pressure die casting

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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Rochester Hills, MI, United States of America

Douglas M Trinowski