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US 10,294,161 B2Granted
Molding material mixtures containing metal oxides of aluminum and zirconium in particulate form
AssigneeASK Chemicals GmbH
InventorsHeinz Deters, Henning Zupan, Martin Oberleiter
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Abstract
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.
Claims25
A mold material mixture for producing casting molds and cores for metal processing, comprising:
- a) a refractory mold base material;
- b) water glass as an inorganic binder;
- and
- c) a powdered additive of at least one mixed particulate metal oxide, containing at least one oxide of aluminum and at least one oxide of zirconium, wherein the mixed particulate metal oxide is:
- at least one particulate mixed oxide;
- a particulate mixture of at least two oxides;
- or
- at least one particulate mixed oxide, with either at least one further particulate oxide or at least one further different particulate mixed oxide;
- wherein the mixed particulate metal oxide is present at between 0.05 wt % and 2.0 wt %, based on the weight of the refractory mold base material.
6 more elements
Dependencies are inferred from the claim text.