Bayer Aktiengesellschaft

Bayer Materialscience Ag

Ferro (italia) Srl

Ferro Corporation

Bayer Intellectual Property Gmbh

Covestro Deutschland Ag

Peter Thometzek

Jan Weikard

Hans-Josef Laas

Reinhard Halpaap

Michael Grahl

Heinrich Christ

Wolfgang Fischer

Christoph Gürtler

Thomas Fäcke

Jakob Rademachers

Christian Zwiener

James Rawlins

Rene De Cleyn

Friedrich Jonas

Hans-Ulrich Meier-Westhues

Udo Guntermann

Klaus Lerch

Hanno Br&uuml;mmer

Thomas F&auml;cke

Bernard Freudenberg

Hans Basten

Arthur Bohnke

Hans Josef Laas

Powder coating binders having a glass temperature of &#x2267;35&#xb0; C. containing at least one polymer and one or more radiation-curing reactive thinners, a process for the production of these powder coating binders and their use as a component of powder coatings.

Solid, radiation-curing binders with reactive thinners

The present invention relates to novel radiation-curing powder coating binders containing maleic and/or fumaric acid esters and one or more amorphous or partially crystalline resins containing at least one group that reacts with ethylenically unsaturated compounds under the action of actinic radiation to form a polymer. The binders have a glass transition temperature ranging from 30 to 90&#xb0; C. The binders can be used as a constituent in coating compositions.

Radiation-curing binders containing carboxylic acid esters

A process for preparing polyisocyanate-modified polycarboxylic acids by conversion of anhydride-group-free polycarboxylic acids with isocyanate-functional compounds. The process includes reacting A) an anhydride-group-free polycarboxylic-acid component with B) an isocyanate-functional component having an (average) isocyanate functionality of at least 1.8, at an equivalent ratio of carboxylic acid groups to isocyanate groups of from 1.2:1 to 120:1. The polyisocyanate-modified polycarboxylic acids are solid below 40&#xb0; C. and liquid above 130&#xb0; C., and have an average carboxylic acid functionality of at least 1.8, a content of free carboxylic acid groups of from 4.0 wt. % to 80.0 wt. % and a content of amide groups of from 0.4 wt. % to 32.5 wt. %.

Polyisocyanate-modified polycarboxylic acids

The invention relates to the use of special mixtures of at least two polycarboxylic acids as crosslinker components for thermally curing powder-lacquer binding agents having groups that are capable of reacting with carboxyl groups. The mixtures include at least two polycarboxylic acids each melting above 95&#xb0; C. and having up to 20 carbon atoms and consist of at least 5 wt. %, of the polycarboxylic acid with the lowest melting point and at least 10 wt. %, of the polycarboxylic acid with the highest melting point of all polycarboxylic acids present in the mixture to at least 5 wt. %. Additionally, the polycarboxylic acid mixture is a solid below 40&#xb0; C. and a liquid above 160&#xb0; C.

Carboxy-functional crosslinkers for epoxy-functional powder-lacquer binding agents

Polyaddition compounds containing uretdione groups prepared by reacting uretdione polyisocyanates formed from diisocyanates having exclusively secondary- and/or tertiary-attached isocyanate groups with a molar fraction of isocyanurate structures, based on the sum of uretdione groups and isocyanurate groups, of not more than 10%, with compounds reactive towards isocyanates. The polyaddition compounds can be use as a starting component in the preparation of polyurethane plastics, in particular as crosslinkers for heat-crosslinkable powder coating materials. The compounds may be used as starting components in the preparation of moldings and shaped parts, and as starting components in the preparation of coating materials and coatings.

Polyadducts containing uretidone groups

The present invention relates to powder coating binders containing polyurethanes having (meth)acryloyl groups which are applied onto a substrate, fused with heat and cured by electromagnetic radiation and to a process for preparing the same.

Solid, radiation-curing powder coating binders and a process for preparing the same

The present invention relates to a process for preparing urethanes containing (meth)acryloyl groups that are suitable as binders for powder coatings by reacting a polyisocyanate component with a hydroxyl group-containing component that contains at least one compound additionally containing (meth)acryloyl groups in a melt of compounds containing (meth)acryloyl groups, which are crystalline in the solid state and have a melting point of 30 to 100&deg; C. and a dynamic viscosity at 111&deg; C. of less than 10 Pa&middot;s, at elevated temperature until the NCO content has dropped below 0.5 wt. %. The present invention also relates to the use of these urethanes as binders for powder coating compositions for coating substrates made of wood, metal, plastics or mineral substances, which may have been primed.

Process for preparing urethanes containing (meth)-acryloyl groups as binders for powder coatings

The present invention relates to pulverent binders for powder coating compositions which contain oligo- and polyurethanes having (meth)acryloyl groups, are curable by means of high energy radiation and have an organic solvent content of less than 1 wt. %. The present invention also relates to a process for preparing these binders in the absence of an organic solvent and to their use in powder coating compositions for coating wood, metal, plastic, mineral and/or preprimed substrates.

Pulverent binders for powder coating compositions containing oligo-  and polyurethanes having (meth)acryloyl groups

The invention relates to a process for the electrostatic lacquering of non-conductive surfaces. For this purpose, a layer of a conductive organic polymer from the class of the polypyrroles, polyanilines or polythiophenes is applied to the surface and this layer is then electrostatically lacquered.

Process for the electrostatic lacquering of non-conductive surfaces

This invention relates to hydrophobic free-flowing pellets having an average particle size of 5 to 150 .mu.m, which consist of one or preferably more hydrophilic inorganic powders having a particle size of &gt;0 to 30 .mu.m and contain one or more hydrophobic polyorganosiloxanes in a quantity of 0.03 to 15% by weight, to a process for their production and to their use.

Hydrophobic free-flowing pellets, a process for their production and

The present invention provides free-flowing chemically resistant color granulates that are heat resistant and color stable in aggressive media. The color granulates comprise 20-94.8% by weight coloring bodies, 5-75% by weight of one or more frits, 0.220% by weight binder and 0.03-15% by weight organosilanes and/or polyorganosiloxanes. The glass frit comprises by weight 20-90% SiO.sub.2 +B.sub.2 O.sub.3 +Al.sub.2 O.sub.3, 0-6% Na.sub.2 O+Li.sub.2 O, 0-6% K.sub.2 O, 10-25% CaO+MgO+ SrO, 0-35% TiO.sub.2 +ZrO.sub.2, 0-40% Bi.sub.2 O.sub.3 +P.sub.2 O.sub.5 +V.sub.2 O.sub.5 +MoO.sub.3 +WO.sub.3 and 0-10% ZnO.

Free-flowing, chemically resistant color granulates, their preparation

The present invention relates to abrasion-resistant granular materials which are composed of one or more inorganic pigments, one or more inorganic elements and/or compounds with a Mohs hardness of at least 7 and one or more inorganic and/or organic binders and optionally frits and/or glasses and/or inorganic fillers, and to their production and their use.

Granular materials, a process for their production and their use

A titanium dioxide composition useful as the opacifier agent for vitreous enamels and fusion enamels comprises TiO.sub.2 predominantly in the form of isometric primary particles from 0.5 to 5.0 .mu.m in size, which are aggregated to predominantly spherolithic particles 1 to 100 .mu.m in diameter, with a BET surface of 1 to 4.5 m.sup.2 /g and an apparent density of 0.2 to 1.3 kg/1, is prepared by subjecting titanium dioxide hydrate having a BET surface of from 50 to 500 m.sup.2 /g to accelerated calcination at temperatures of 800.degree. to 1600.degree. C.

Titanium dioxide, a process and its production

Sinterable raw material product for ceramics based on aluminum titanate, consisting essentially of particles having a core/shell structure with a core of an oxide, oxide hydrate or hydroxide of ether of aluminum or titanium on which are precipitated, as a shell, sparingly soluble compounds of the other aluminum or titanium not used as the core matrial, with the molar ratio of titanium to aluminum of from 1:0.1 to 1:30, which in addition to the precipitated compounds of aluminum or titanium contains additional sparingly soluble compounds of elements in a quantity of from 0.1 to 65% by weight, calculated as oxide of the element and based on the total quantity are useful in fabricating sintered bodies for high temperature environments which include internal combustion engine parts, tubes for transporting liquid metals, catalysts carriers and so forth.

Sinterable pulverulent raw material based on aluminum titanate, a

A titanium dioxide composition useful as the opacifier agent for vitreous enamels and fusion enamels comprises TiO.sub.2 predominantly in the form of isometric primary particles from 0.5 to 5.0 .mu.m in size, which are aggregated to predominantly spherolithic particles 1 to 100 .mu.m in diameter, with a BET surface of 1 to 4.5 m.sup.2 /g and an apparent density of 0.2 to 1.3 kg/l, is prepared by subjecting titanium dioxide hydrate having a BET surface of from 50 to 500 m.sup.2 /g to accelerated calcination at temperatures of 800.degree. to 1600.degree. C.

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Stuttgart, Germany

Peter Thometzek