Bayer Aktiengesellschaft

Covestro Deutschland Ag

Covestro Intellectual Property Gmbh & Co. Kg

Stefan Groth

Lutz Schmalstieg

Frank Richter

Reinhard Halpaap

Detlef-Ingo Sch&uuml;tze

Ruiwen Wu

Antonio Midolo

Hao Liu

Manfred Bock

Friedhelm Steffens

Josef Sanders

Markus Mechtel

Oswald Wilmes

Theodor Engbert

Tim Loddenkemper

Gerhard Jonschker

Andreas Hecking

Robert Maleika

Jan Busch

Hongchao Li

Wilfried Litz

Eberhard Stelter

Josef Pedain

Jan Mazanek

Lothar Puppe

Bernd Klinksiek

Michael Ludewig

Mathias Matner

Philip E Yeske

Rolf Gertzmann

Gerhard Ruttmann

Rolf Langel

Claus Kobusch

J&uuml;rgen Urban

Ulrike Dellwo

Philip Yeske

Hao Lui

The invention relates to a process for producing a polyisocyanate composition comprising addition of at least one isocyanate-inert solvent to at least one polyisocyanate, characterized in that the addition of the solvent is carried out in one or more stages and at least one of these stages is performed as a continuous dilution. The invention further relates to the polyisocyanate compositions obtainable by the process, to the use of the polyisocyanate compositions, to a two-component system containing the polyisocyanate composition and to composite systems produced with the two-component system.

Continuous dilution of polyisocyanates

The invention relates to a polyisocyanate which is based on tolylene 2,4-diisocyanate, tolylene 2,6-diisocyanate or a mixture of tolylene 2,4- and 2,6-diisocyanate and has isocyanurate groups, wherein the polyisocyanate has

TDI based low-viscosity polyisocyanates with isocyanurate groups

The invention relates to a polyisocyanate mixture comprising at least one polyisocyanurate which is based on tolylene diisocyanate and has isocyanate groups and at least one polyurethane which is based on tolylene diisocyanate and has isocyanate groups, wherein the polyisocyanate mixture has a) a solids content of from &#x2265;51 to &#x2264;90% by weight, based on the total weight of the polyisocyanate mixture and b) a content of monomeric tolylene diisocyanate of &#x2264;0.9% by weight, based on the total weight of the polyisocyanate mixture, and the polyisocyanurate which is based on tolylene diisocyanate and has isocyanate groups has a polydispersity D of from &#x2265;1 to &#x2264;1.5, based on the total weight of the polyisocyanurate which is based on tolylene diisocyanate and has isocyanate groups, where the polydispersity D is the ratio of weight average and number average molecular weight of the polyisocyanurate and the weight average and number average molecular weight is in each case determined by means of gel permeation chromatography using a polystyrene standard and tetrahydrofuran as eluent in accordance with DIN 55672-1:2016-03.

TDI based polyisocyanate mixture with a high solids content

The invention relates to a novel method for producing polyisocyanurates comprising isocyanate groups, based on 2,4- and 2,6-toluylene diisocyanate (TDI) and to the use thereof in coating compositions.

Method for producing TDI-trimerisates with high purity

Polyurethane coatings, based on polyisocyanates containing uretdione and/or oxadiazinetrione groups

Polyurethane prepolymers with reduced functionality having terminal alkoxysilane and OH groups, a method of preparing them and their use

Reactive compositions with an extended pot life

The present invention relates to a composition comprising monoaspartic acid esters and polyaspartic acid esters as well as an addition product prepared from an unsaturated dicarboxilic acid compound and a thiol, a process for their production, and their use as reactive component for polyisocyanates in two-component polyurethane systems.

Stabilized monoaspartic acid esters and polyaspartic acid esters

Reactive binding agent with an extended pot life

Hybrid coating compositions

Coating compositions containing alkoxysilanes

The present invention relates to a process for the production of trimerized polyisocyanates containing at least 30 mole % of iminooxadiazinedione groups (asymmetric trimers) in the trimer mixture by catalytically trimerizing a starting isocyanate selected from organic di- or polyisocyanates having a number average molecular weight of 140 to 600 and containing aliphatically, cycloaliphatically and/or araliphatically bound isocyanate groups in the presence of quaternary ammonium and phosphonium fluoride trimerization catalysts corresponding to the formula

Process for preparing polyisocyanates containing iminooxadiazinedione

The present invention relates to a process for the preparation of trimerized polyisocyanates that contain at least 30 mole % of iminooxadiazinedione groups (asymmetric trimers) in the trimer mixture, by catalytically trimerizing a starting isocyanate selected from organic di- or polyisocyanates having a number average molecular weight of 140 to 600 and containing aliphatically, cycloaliphatically and/or araliphatically bound isocyanate groups in the presence of a quaternary phosphonium polyfluoride trimerization catalyst corresponding to the formula

The present invention relates to transparent coating compositions containing a binder and 0.5 to 25 wt. %, based on resin solids, of a material consisting of nanoscale primary particles obtained by jet dispersion of the nanoscale particles in the coating composition. The present invention also relates to a process for the production of these transparent coating compositions containing nanoscale particles by passing the coating compositions containing nanoscale primary particles and a binder in at least one pass through an apparatus which has at least one nozzle or at least one slit having a bore diameter or slit width of 0.05 to 1 mm and a length to diameter ratio of the bore or a depth to slit width ratio of the slit of 1 to 10, wherein there is a pressure differential between the nozzle inlet and outlet of at least 0.5, preferably of 1 MPa.

Transparent coating compositions containing nanoscale particles and

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Leverkusen, Germany

Stefan Groth