Covestro Deutschland Ag

Bayer Materialscience Ag

Covestro Intellectual Property Gmbh & Co. Kg

Reinhard Halpaap

Andreas Hecking

Frank Richter

Hans-josef Laas

Dirk Achten

Hans-Josef Laas

Friedhelm Steffens

Christoph Eggert

Jan Busch

Josef Sanders

Oswald Wilmes

Tim Loddenkemper

Nusret Yuva

Dorota Greszta-Franz

Stefan Groth

Gesa Behnken

Jan Weikard

Martin Brahm

Dieter Mager

Sigurd Buchholz

Raul Pires

Michael Grahl

Florian Johannes Stempfle

Paul Heinz

Florian Golling

Ursula Tracht

Tanja Hebestreit

Irene Cristina Latorre Martinez

Frank-Stefan Stern

Martin Anstock

Andreas Gosch

Magdalena Fluegel

Achim Meyer

Robert Reyer

Richard Daniel Matthias Meisenheimer

Philip Bahke

Adrian Cosmin Dobre

Klaus Tidow

Uwe Werner

Nadine Der

Katja Riehl

Frank Langenfeld

Fee Strobel

Magdalena FLÜGEL

The present invention relates to a polyisocyanate composition, comprising a mixture of ≥60 wt. %, relative to the total weight of the mixture, of at least one polyisocyanate based on pentamethylene diisocyanate and ≤40 wt. %, relative to the total weight of the mixture, of at least one polyisocyanate based on a cycloaliphatic diisocyanate and and/or of at least one polyisocyanate based on pentamethylene diisocyanate and at least one cycloaliphatic diisocyanate, the polyisocyanate composition having a residual monomer content of monomer diisocyanates below 0.5 wt. %, relative to the total weight of the polyisocyanate composition.

Polyisocyanate composition for coatings

The present invention relates to a process for producing polyaspartic ester compositions by reacting cyclic ethers bearing primary amino and/or primary aminoalkyl groups with fumaric and/or maleic esters, to the polyaspartic ester compositions thus obtainable, and to the use thereof in two-component coating compositions.

Binders containing secondary amine groups, based on cyclic ethers

The present invention relates to a polyisocyanate composition comprising a formation component having isocyanate groups, the isocyanate groups having been reacted to an extent of &#x2265;98% with at least one CH-acidic compound, characterized in that the formation component consists to an extent of &#x2265;51% by weight of at least one polyisocyanate based on pentamethylene 1,5-diisocyanate having a content of isocyanurate trimer of &#x2264;60 area %, based on the total weight of the polyisocyanates based on pentamethylene 1,5-diisocyanate, and the remaining proportion up to 100% by weight of the total amount of polyisocyanates present in the formation component consists of at least one aliphatic or cycloaliphatic polyisocyanate. The present invention further provides a one-component system comprising the polyisocyanate composition, a process for producing a coating on a substrate, and the coatings obtainable from the one-component system.

Blocked polyisocyanate composition based on pentamethylene 1,5-diisocyanate

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

The invention relates to modified polyisocyanates, obtained by reacting at least one polyisocyanate (A) based on 1,5-diisocyanatopentane with at least one silane compound (B) which is reactive with respect to isocyanate groups. The invention also relates to a method for producing the modified polyisocyanates and to the use thereof as starting components in the production of polyurethane plastics, in particular as crosslinker components in polyurethane paints and coatings.

Silane groups containing polyisocyanates based on 1,5-diisocyanatopentane

The invention relates to a polyisocyanate mixture containing at least one polyisocyanate based on 1,5-diisocyanatopentane and at least one organic solvent, said organic solvent being inert with respect to isocyanate groups and the polyisocyanate mixture has a solid body content of &#x2265;35 and &#x2264;65 wt. %. The invention also relates to a two-component system, to a method for producing a coating, to the thus obtained coatings and to a composite consisting of the coating and a substrate.

Polyisocyanate mixture based on 1,5-diisocyanatopentane

The invention relates to polyisocyanates comprising urethane groups, based on toluylene diisocyanate, to a method for their production, and to their use as the polyisocyanate component in one- and two-component polyurethane coatings.

Method for producing light-coloured TDI-polyisocyanates

A process for continuous preparation of oligomeric or polymeric isocyanates by catalytic modification of monomeric di- and/or triisocyanates, characterized in that at least one isocyanate component A and at least one catalyst component B are combined continuously in a reaction apparatus and conducted through the reaction apparatus as a reaction mixture, the residence time distribution being characterized according to the dispersion model by Bo (Bodenstein number) above 40, preferably above 60 and most preferably above 80.

Process for continuous isocyanate modification

The present invention relates to a process for obtaining organic isocyanate from a phosgenation product comprising the isocyanate, comprising the following steps: a) workup to the phosgenation product, the workup comprising at least one distillation step in which a first portion of the organic isocyanate is removed as distillate and a distillation residue comprising a second portion of the organic isocyanate is obtained, b) workup of the distillation residue obtained in a), the workup comprising at least one distillation step which is conducted at a temperature of up to 110&#xb0; C. at a pressure of not more than 1 mbar, wherein at least 50% by weight of the second portion of the organic isocyanate is removed from the distillation residue.

Process for obtaining organic isocyanates from distillation residues from isocyanate preparation

The invention relates to the use of specific pyridines as catalysts for the dimerization of isocyanates (uretdione formation) and a process for preparing polyisocyanates having a high content of uretdione groups.

Preparation of uretdione polyisocyanates

The invention relates to a process for preparing polyisocyanates having a high uretdione group content by phosphine-catalysed isocyanate oligomerization in the presence of organic carbonates and/or nitriles.

Uretdione formation in solution

The invention relates to a novel process for conditioning isocyanates. The purpose of conditioning of isocyanates or of mixtures of isocyanates is to remove organophosphorus components in a suitable manner such that the organophosphorus compounds no longer interfere with processing of the isocyanates.

Process for conditioning isocyanates

A method of dimerizing isocyanates including reacting the isocyanates in the presence of phosphines containing at least one directly phosphorus-attached bicyclic, cycloaliphatic radical. The polyisocyanate compositions obtained as described above can be used in mouldings, coating materials, adhesives, sealants or adjuvants that further include the polyisocyanate compositions and one or more materials selected from antioxidants, light stabilizers, pigments, fillers, additives, levelling assistance, defoamers and matting agents. The coating materials, adhesives or sealants can be used to coat substrates.

Preparation of polyisocyanates containing uretdione groups

The invention relates to the use of cycloalkylphosphines as catalysts for isocyanate dimerization and to a process for preparing polyisocyanates containing uretdione groups.

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Langenfeld, Germany

Andreas Hecking