Ask Chemicals Gmbh

Heinz Deters

Martin Oberleiter

Henning Zupan

Hannes Lincke

Oliver Schmidt

Ronja Resch

Diether Koch

Christian Priebe

Jens Müller

Frank Lenzen

Antoni Gieniec

Jörg Körschgen

Dennis Bartels

Carolin Wallenhorst

Markus Dörschel

Philip Schneider

The invention relates to a binder, which contains water glass and further a phosphate or a borate or both. The invention further relates to a method for constructing molds and cores layer by layer, the molds and cores comprising a construction material mixture, which at least comprises a refractory molding base material, and the binder. In order to produce the molds and cores layer by layer in 3-D printing, the refractory molding base material is applied layer by layer and is selectively printed with the binder layer by layer, and consequently a body corresponding to the molds or cores is constructed and the molds or cores are released after the unbonded construction material mixture has been removed.

Method for constructing molds and cores layer by layer by means of a binder containing water glass, and a binder containing water glass

The object of the invention is a component system for producing a binder for metal casting on the basis of phenolic resins of the benzyl ether type and isocyanates containing non-polar solvents.

Component system for producing cores and molds

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&#xb0; C. and less than 200&#xb0; 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&#x2550;O, where Ris H or a C1 or C2 alkyl and Ris a carboxyl group R&#x2014;C(&#x2550;O)&#x2014;O&#x2014; bonded via the oxygen atom, where R is a C1 to C3 hydrocarbon.

Method, using a carbonyl compound, for producing moulds and cores for metal casting, and the moulds and cores produced thereby

The invention relates to mold material mixtures containing an oxide of aluminum and an oxide of zirconium as particulate mixed metal oxide, in combination with refractory mold base materials and a water glass-based binder system. The mold material mixtures, also in the form of multicomponent systems, are used for the production of molds and cores for the foundry industry.

Molding material mixtures containing metal oxides of aluminum and zirconium in particulate form

The invention relates to mold material mixtures containing at least one aluminum oxide in the alpha phase and/or at least one aluminum/silicon mixed oxide, except for aluminum/silicon mixed oxides having a layered silicate structure, as a particulate metal oxide, in combination with refractory mold base materials and a water glass-based binder system. The mold material mixtures are used for the production of molds and cores for the foundry industry.

Molding material mixtures containing aluminum/silicon oxides in particulate form

The invention relates to mold material mixtures on the basis of inorganic binders, for producing molds and cores for metal casting. Said mixtures consist of at least one refractory mold base material, an inorganic binder and amorphous silicon dioxide as an additive. The invention also relates to a method for producing molds and cores using said mold material mixtures.

Mold material mixtures on the basis of inorganic binders, and method for producing molds and cores for metal casting

The invention relates to lithium-containing molding material mixtures comprising a refractory main molding material, an inorganic binder, and amorphous silicon dioxide as an additive in the production of molds and cores for metal casting. The invention further relates to a method for producing molds and cores using the molding material mixtures and to molds and cores produced according to the method.

Lithium-containing molding material mixture based on an inorganic binder for producing molds and cores for metal casting

The invention relates to molding material mixtures containing barium sulfate in combination with refractory basic molding materials and a waterglass-based binder system for producing casting molds and cores for the foundry industry in order to obtain cast pieces, in particular aluminum ones, which have an improved cast surface.

Molding material mixtures containing barium sulfate

The invention relates to molding material mixtures containing a molding base material, water glass, amorphous silicon dioxide and an oxidic boron compound, and the production of molds and cores, in particular for metal casting.

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Düsseldorf, Germany

Heinz Deters