Basf Aktiengesellschaft

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Basf Se Corporation

Hans Renz

Bernd Bruchmann

G&uuml;nter Mohrhardt

Erich Beck

Wolfram Weiss

Stefan Wolff

Werner Langer

Hubert Baumgart

Dietrich Scherzer

Heinz-Dieter Lutter

Rainer K&ouml;niger

Peter Weyland

Ulrich Treuling

Wolfgang Heider

Karl Haberle

Ulrike Ehe

Gunter Mohrhardt

Joachim J&auml;hme

Simone Bitter

Franz Merger

Reinhold Schwalm

Tom Witzel

Karl Haeberle

Wolfgang Reich

Ulrich Poth

Fritz E Kempter

Harro Petersen

Manfred Niessner

Eva Wagner

Matthias Lokai

Konrad Roschmann

Stephan Kothrade

Alfred Lindner

Guenter Eckert

Edmund Keil

Adolf Nuber

Martin Reif

Heino Thiele

Andreas Otterbach

Ludwig Jung

Horst Seibert

Horst Schmidt

Reinhard Treiber

Michael Schiessl

Jurgen Reichert

Reinhard Lang

Brigitta Huckestein

Ralph Diener

Joachim Jähme

Guenter Mohrhardt

Rudolf Müller-Mall

Alwin Sturm

Bettina Porsch

Werner Hofscheuer

Rudolf M&uuml;ller-Mall

Rainer Königer

High-functionality polyisocyanates are prepared by a process which comprises

High-functionality polyisocyanates

A process for the preparation of polyisocyanates which contain one or more biuret groups, by reacting

Preparation of biuret-containing polyisocyanates

The invention provides a composition for producing surface coatings combining improved hardness, scratch resistance and acid resistance with good reflow behavior, a process for preparing such a surface coating, and for the use of polyisocyanatoisocyanurates having a functionality of more than 3.5 and a viscosity at 23&deg; C. of more than 3500 to produce surface coatings.

Compositions containing highly viscous polyisocyanates

Compounds having isocyanate groups with or without blocking, allophanate groups and free-radically polymerizable C&mdash;C double bonds, the C&mdash;C double bonds being in activated form by virtue of a carbonyl group attached directly to them or by virtue of an oxygen atom in ether function (activated double bonds), derived from polyisocyanates and alcohols A which in addition to the alcohol group also carry an activated double bond (compounds I). The invention additionally relates to radiation-curable formulations and coating compositions comprising the compounds I, to methods for coating using these substances, and to coated articles produced using these methods. Furthermore, the invention relates to the use of the compounds I in radiation-curable compositions such as in casting compositions, dental compounds, composite materials, sealing compounds, adhesives, troweling compounds, printing inks, in photostructurable compositions such as solder resists, photoresists, photopolymeric printing plates, and stereolithography resins.

Coating agents which can be hardened by the addition of isocyanate groups as well as by the radiation-induced addition of activated c-c double covalent bonds

Polyisocyanates with allophanate groups derived from alicyclic alkanediols

Storage-stable polyisocyanates

Reactive polymers and isocyanate-reactive polymers obtainable therefrom

Polyisocyanates

A process for preparing biuret-functional polyisocyanates from at least one aliphatic or cycloaliphatic diisocyanate and from at least one amine or water or a mixture thereof as reactants involves mixing the reactants with one another in a mixing unit having a high shear action.

Process for producing polyisocyanates containing biuret groups from (cyclo)aliphatic diisocyanates

Two-component polyurethane systems composed of an at least bifunctional polyisocyanate component and a polyol component have a polyol component which comprises at least one hydroxyl-containing cyclic acetal and/or ketal.

Two-component polyurethane systems which contain reactive diluents

Compounds with isocyanate groups and masked groups reactive in relation

Sheet-like polyurethane moldings are produced by impregnation of porous sheets with a prepolymer containing free isocyanate groups and reversibly blocked isocyanate-reactive groups or containing free isocyanate-reactive groups and reversibly blocked isocyanate groups, and subsequent reaction of the prepolymers in a heated mold.

Production of sheet-like polyurethane moldings

Water-emulsifiable polyisocyanates containing

Water-emulsifiable polyisocyanates

In one-component and two-component polyurethane coating compositions comprising at least one reactive component capable of reacting with polyisocyanates, the reactive component is a compound A) containing an isocyanate group, a urethane, thiourethane or urea group and two capped isocyanate-reactive groups.

One-component and two-component polyurethane coating compositions

The invention is to a process for the preparation of biuret-containing polyisocyanates by catalytic reaction of aliphatic and/or cycloaliphatic diisocyanates with a biuretizing agent, where the biuretizing agent employed is water in finely disperse form and the reaction is carried out in the presence of OH-acidic compounds.

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Meckenheim, Germany

Hans Renz