Dynamit Nobel Aktiengesellschaft

Huels Troisdorf Ag

Basf Aktiengesellschaft

Heinz Nestler

Dieter Barfurth

Jurgen Amort

Friedhelm Schnippering

Werner Dittrich

Claus-Dietrich Seiler

Manfred Ohlinger

Paul Deigner

Otto Ambros

Helmut Jakusch

Walter Josten

Claus Lindzus

Eduard Schonafinger

Leo Hans Plankl

Eberhard Koester

Dieter Schaefer

Eduard Schoenafinger

Werner Stumpfi

Juergen Amort

Dieter Muller

Zirconium(IV) chelates with citric acid ester radicals and optionally with alkoxy groups are prepared from tetraalkoxy zirconate and a citric acid ester; they are useful as components of printing inks.

Zirconium chelates, their preparation, and their use in printing inks

Novel alkoxy titanium(IV)-chelates are used to modify printing inks based on nitrocellulose or other cellulose ester derivatives. The novel chelates comprise citric acid alkyl esters as chelate formers. They delay, as other titanium chelates do, the well-known catalytic effect of the titanium component in cross-linking reactions. When used in printing inks, the novel titanium chelates and their alcoholic solutions have the advantage that they have an insignificant color of their own, so that they practically do not discolor the printing inks. A further advantage of the novel chelates resides in that they do not enter into alteration effects with antioxidants based on phenol, so that they can also be used for printing inks which are to be applied to polymeric substrates containing such antioxidants without the occurence of discoloration.

Titanium(IV)-chelates and their use in printing inks

Titanium chelates with 1 to 2 acetoacetic acid ester ligands and one to two alkoxy groups per titanium atom the sum of these ligands and the alkoxy groups being three as well as Ti-O-Ti bridge between two titanium atoms are formed by release of alcohol and condensation of mono- or bis-acetoacetic acid ester-Ti-(IV)-chelates which have up to 4 alkoxy groups per titanium atom.

Condensed acetoacetic acid ester titanium chelates and process for their

Titanium chelate - based compositions are used as additives for liquid or pasty coating agents, especially printing inks; they consist of a mixture of titanium chelates of saturated diols and titanium acylates of saturated monocarboxylic acids.

Compositions based on titanium chelates of diols and titanium acylates

The present invention relates to new titanium acetylacetonates. The new compounds contain one or two glycol ether groups bound to the central titanium atom. Their solutions in glycol ethers yield, after dilution with water down to chelate contents as low as 1 percent by weight, stable solutions which, even after several months of standing, display neither precipitation nor turbidity.

Water-soluble titanium acetylacetonates

New titanium chelates containing triethanolamine as chelating agent, plus one or two glycol ether groups bound to the titanium atom are disclosed. Solutions of these new titanium chelates, pure or solved in glycol ether, can be diluted with water such that even 1% aqueous solutions are stable and show no turbidity or precipitation even after several weeks of standing. The new compounds are obtained by the reaction of the known triethanolamine titanates with glycol ethers, followed by distillation of the alcohol that forms, plus the alcohol serving as solvent, if any.

Water-soluble triethanolamine titanates

The present invention relates to new titanium chelates containing both acetylacetone and malonic acid dialkyl ester as chelating agents. The acetylacetone moiety is contained in these new chelates in amounts between 1.25 and 1.95 moles and the malonic acid dialkyl ester moiety in amounts between 0.05 and 0.75 moles per gram-atom of titanium. The new chelates have the same properties as the known titanium acetylacetonates; however, they have the advantage that they are only slightly yellow and in many applications they have an improved stability.

Modified titanium (IV) acetylacetonates

Organic titanium chelates which contain only acetylacetone and triethanolamine as ligands and chelating agents and are soluble in glycol ethers are disclosed. The addition of even a small amount of the glycol ether to these new substances improve the stability of their aqueous solutions in an extraordinary manner. Preferably, solutions of 50 to 80% of these new chelates are used, from which very dilute aqueous solutions, i.e., 1 to 5% of extraordinarily high stability can be made.

Titanium chelates and preparation of these chelates

Disclosed are new zirconic acid esters which contain glycol ether moieties as the ester grouping, and which are chelated with one and up to a maximum of two moles of acetylacetone. The new compounds can also contain up to a maximum of two moles of ester groupings of low alkanols. The new partially chelated zirconic acid esters are characterized by good solubility in water, in which they do not decompose at room temperature. Accordingly, they can also be used in aqueous systems as crosslinking agents or reaction accelerators.

Water-soluble zirconic acid esters

The present invention relates to binding agents for coating compositions which can be used for making foundry molds. The new compositions contain known polymeric titanic acid esters which are treated with chelating agents. The preferred chelating agents are beta-dioxo compounds. The chelating agents are contained in the binding agent in amounts between 0.2 and 1 gram molecule per gram atom of titanium. The new binding agents can be prepared in a simple manner from titanic acid esters, water and the chelating agent, the amount of water being selected in accordance with the degree of condensation desired in the polymeric titanic acid ester.

Binding agents containing titanic acid esters for the preparation of

A process for the preparation of partial hydrolyzates of orthosilicic acid tetra(alkoxyalkyl) ester having a stable shelf life is described by hydrolysis of a silicic acid tetra(alkoxyalkyl) ester with water, suitably in the presence of an acid and optionally in the presence of a solvent, wherein the stoichiometrically necessary amount of water is present at the commencement of the reaction.

Process for the manufacture of partial hydrolysates of

A cold-stable catalytically active solution of diisopropoxy-bis (2,4-pentanedionato)-titanium(IV) in isopropanol, said solution containing 0.05 to 0.15 mol of water per mol of said titanium compound.

Liquid, cold-stable titanium catalyst preparation

An iron oxide pigment having a coating of a silane of the formula

Iron oxide magnetic pigments for the production of magnetic coatings

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.

Growing community of inventors

Troisdorf-Eschmar, Germany

Heinz Nestler