Bayer Materialscience Ag

Covestro Deutschland Ag

Christoph Gurtler

Wolfgang Fischer

Christian Wamprecht

Jan Weikard

Walter Leitner

Michael Mager

Markus Mechtel

Holger Mundstock

Muhammad Afzal Subhani

Thomas Klimmasch

Arno Nennemann

Jorg Schmitt

The invention relates to a method for producing polyether ester carbonate polyols by attaching at least one alkylene oxide, at least one cyclical anhydride, and carbon dioxide to one or more H-functional starter substances in the presence of a double metal cyanide catalyst. The method is characterized in that (&#x3b1;) a suspension agent, which does not contain H-functional groups, is provided in a reactor, and (&#x3b3;) one or more H-functional starter substances are continuously metered into the reactor during the reaction process, and the one or more alkylene oxides, the cyclical anhydride, and optionally the carbon dioxide are metered simultaneously or sequentially.

Method for producing polyether ester carbonate polyols

The invention relates to a process for preparing binders which contain 1) allophanate groups, 2) groups that react with ethylenically unsaturated compounds with polymerization on exposure to actinic radiation (radiation-curing groups) and 3) optionally NCO-reactive groups, by reacting at temperatures &#x2266;130&#xb0; C. The present invention also relates to the binders obtained by the process of the invention.

Radiation-curing binders and a process for their preparation

The present invention relates to innovative, nanoparticle-modified polyisocyanates, a process for their preparation and to their use in coating compositions and adhesives. The process comprises the steps of 1) reacting A) polyisocyanates with B) alkoxysilanes, and subsequently 2) incorporating by dispersion inorganic particles, optionally surface modified, having an average particle size of less than 200 nm as determined by means of dynamic light scattering in dispersion, where the alkoxysilanes are according to formula (I)Q-Z&#x2014;SiXY&#x2003;&#x2003;(I)in which Q is an isocyanate-reactive group, X is a hydrolysable group, Y is identical or different alkyl groups, Z is a C-Calkylene group and a is an integer from 1 to 3.

Nanoparticle-modified polyisocyanates

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Cologne, Germany

Christoph Gurtler