Bayer Materialscience Ag

Allnex IP S.a.r.l.

Bayer Intellectual Property Gmbh

Covestro Deutschland Ag

Jürgen Lippemeier

Stefan Sommer

Wolfgang Fischer

Harald Blum

Jan Weikard

Michael Ludewig

Thorsten Rische

Erhard Luehmann

Miguel Fernandez

The present invention relates to a process for the preparation of low-viscosity polyisocyanate reaction products which contain allophanate groups, can be readily emulsified in water and contain activated groups which react, by polymerization, with ethylenically unsaturated compounds under the action of actinic radiation. The present invention furthermore relates to the products which can be prepared by the process according to the invention and their use.

Process for the preparation of low-viscosity, water-emulsifiable allophanates with radiation-curable groups

The invention relates to radiation curable coating systems on the basis of aqueous polyurethane dispersions, to a method for the production thereof, to the use of the coating systems as paints and/or adhesives, and to objects and substrates provided with said paints and/or adhesives.

Aqueous coating systems based on physically drying urethane acrylates

The present invention relates to radiation-curable coating compositions based on tin-free aqueous polyurethane dispersions based on polyurethane acrylates (i), characterized in that the polyurethane acrylate (i) comprises as builder components A) one or more compounds with at least one group which is reactive towards isocyanate and at least one unsaturated group which can undergo free radical polymerization, B) one or more compounds which differ from A) and have at least one group which is reactive towards isocyanate, C) one or more compounds with at least one group which is reactive towards isocyanate and additionally at least one group having a hydrophilizing action, D) one or more organic polyisocyanates, which are reacted in the presence of F) bismuth(III) salt(s) and G) an acid having a pKa of &#x3c;2.5, and a process for the preparation thereof, the use of the coating compositions as lacquers and/or adhesives, and objects and substrates provided with these lacquers and/or adhesives.

Tin-free aqueous polyurethane dispersions

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Kö'ln, Germany

Jürgen Lippemeier