The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 2020
Filed:
Dec. 19, 2014
Ask Chemicals Gmbh, Hilden, DE;
Heinz Deters, Düsseldorf, DE;
Hannes Lincke, Cologne, DE;
Ronja Resch, Velbert, DE;
Oliver Schmidt, Langenfeld, DE;
ASK Chemicals GmbH, Hilden, DE;
Abstract
A moulding material mixture with at least one refractory material and water glass as an inorganic binding agent is used for producing casting moulds. The binding agent is cured with the aid of a carbonyl compound that has a molecular weight greater than 88 g/mol and less than 200 g/mol and a boiling point at 1013 hPa greater than 20° C. and less than 200° C. The at least one carbonyl compound is introduced into the gas phase, or carried with the gas phase. The at least one carbonyl compound has the formula RRC═O, where Ris H or a C1 or C2 alkyl and Ris a carboxyl group R—C(═O)—O— bonded via the oxygen atom, where R is a C1 to C3 hydrocarbon.