Dynamit Nobel Aktiengesellschaft

Werner Dittrich

Heinz Nestler

Friedhelm Schnippering

Walter Josten

Dieter Barfurth

A binder for a pigmentous composition containing a silicic acid ester which in turn contains at least one alkoxyalkyl group, a pigmentous composition, especially a zinc dust paint, comprising said binding agent and a paint composition comprising said binding agent and a resin preferably further containing a pigment.

Binding agent for coating compositions having a long shelf life

A ceramic molding composition comprising an alcoholate of aluminum or a metal of the fourth sub-group of the Periodic System, a refractory metal oxide and a polyvalent alcohol, an improvement in the formation of a ceramic product wherein a ceramic molding composition is shaped and hardened, which improvement resides in employing the above defined ceramic molding composition.

Process for the manufacture of refractory ceramic products

A ceramic molding composition comprising an alcoholate of aluminum or a metal of the fourth sub-group of the Periodic System, a refractory metal oxide and an agent selected from the group consisting of diketones of the formula ##STR1## wherein R.sub.1 and R.sub.2 are each independently an aliphatic radical of between C.sub.1 and C.sub.18 carbon atoms or an aromatic radical from C.sub.6 to C.sub.18 carbon atoms, a hydroxycarboxylic acid compound of the formula ##STR2## wherein R.sub.3 is an aliphatic radical of C.sub.1 and C.sub.18 or an aromatic radical from C.sub.6 to C.sub.18, and R.sub.4 is hydrogen or an alkyl radical of C.sub.1 to C.sub.4, and a polyvalent alcohol, an improvement in the formation of a ceramic product wherein a ceramic molding composition is shaped and hardened, which improvement resides in employing the above defined ceramic molding composition.

An improvement in a process for making a mold for metal casting by applying a fluid ceramic composition containing binding agent and finely divided refractory substance to a pattern and hardening the same, which improvement comprises employing a ceramic composition which contains special solvents, anti-setting and thixotropic agents, so that this composition after applying gives a uniform coat which does not run down from walls.

Method of making molds for the casting of metals

A stabilized hydrolyzed silicic acid ester composition comprising a hydrolyzed silicic acid ester in which is dissolved a stabilizer selected from the group consisting of cyclic ethers, ether alcohols, carboxylic acid esters and ketones.

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Herten, Germany

Werner Dittrich