Bayer Aktiengesellschaft

Covestro Deutschland Ag

Bayer Intellectual Property Gmbh

Bayer Materialscience Ag

Hans-Ulrich Meier-Westhues

Reinhard Halpaap

Hans-Josef Laas

Wolfgang Schultz

Christian Wamprecht

Lothar Kahl

Ulrich Freudenberg

Walter Schafer

Manfred Bock

Hans-Peter Klee

Jan Mazanek

Knud Reuter

Jurgen Meixner

Thomas Klimmasch

Eberhard K&ouml;nig

Hanns P Muller

Harald Blum

Helmut Reiff

Hanns-Peter Muller

Dieter Mager

Dorota Greszta-Franz

Christoph Irle

Rolf Gertzmann

Oswald Wilmes

Gebhard Wagner

Peter Thometzek

Raymond Audenaert

Michael Grahl

Hubertus Eversheim

Rolf Roschu

Karin Naujoks

Hans J Laas

Harald Mertes

Hans Schlegel

Olaf Fleck

Gunter Ruf

Sabine Schlitte

Bernd Steinhilber

Joachim Sch&uuml;ll

Karl-Heinz K Asler

Michèl La Faille

The invention relates to novel solvent-free, monomer-depleted polyisocyanate mixtures, and to the use thereof for producing light-resistant and weather-resistant polyurethane bodies with high optical refraction and low optical dispersion.

Polyisocyanate mixtures

Polyaddition compounds containing uretdione groups prepared by reacting uretdione polyisocyanates formed from diisocyanates having exclusively secondary- and/or tertiary-attached isocyanate groups with a molar fraction of isocyanurate structures, based on the sum of uretdione groups and isocyanurate groups, of not more than 10%, with compounds reactive towards isocyanates. The polyaddition compounds can be use as a starting component in the preparation of polyurethane plastics, in particular as crosslinkers for heat-crosslinkable powder coating materials. The compounds may be used as starting components in the preparation of moldings and shaped parts, and as starting components in the preparation of coating materials and coatings.

Polyadducts containing uretidone groups

The invention relates to particular mixtures of polyisocyanates which are blocked with 3,5-dimethylpyrazole, and to the use thereof as crosslinking component in single-component stoving lacquers, especially automotive clear lacquers.

Dimethylpyrazole-blocked isocyanate mixtures

The present invention relates to blocked polyisocyanate crosslinking agents, to the production thereof and to the use thereof in single-component stoving lacquers, particularly OEM clear lacquers (original equipment material, initial lacquer coating).

Malonic acid ester/triazole mixed blocked HDI trimer/formaldehyde stabilization

The present invention relates to a process for the production of polyisocyanates containing uretdione groups by

Process for the production of light-colored uretdione polyisocyanates

The present invention relates to polyisocyanate-modified dicarboxylic acid derivatives obtainable by reacting organic polyisocyanates with excess quantities, based on the equivalent ratio of NCO/COOH groups, of dicarboxylic acid (poly)anhydrides containing free carboxyl groups and water. The present invention also relates to coating compositions, in particular powder coating compositions, containing these polyisocyanate-modified dicarboxylic acids as curing agents for resins containing epoxy groups.

Polyisocyanate-modified polycarboxylic acids and their use as

The present invention relates to aqueous polyurethane dispersions having a resin solids content of 20 to 60 wt %, a viscosity at 23.degree. C. of 10 to 20,000 mPa.s and a pH of 5.5 to 8.5, wherein the polyurethane has a weight average molecular weight of 5,000 to 500,000 and a urethane group content (calculated as --NHCO--O--, molecular weight=59) of 2.5 to 15 wt %, and is based on a polyisocyanate component containing 50 to 100 wt % of 1-methyl-2,4- and/or -2,6-diisocyanatocyclohexane. The present invention also relates to aqueous binder compositions containing these aqueous polyurethane dispersions and known crosslinking resins and to the use of the aqueous polyurethane dispersions and aqueous binder compositions as binders for glass fiber sizings.

Aqueous polyurethane dispersions based on 1-methyl-2,4-and/or

The present invention relates to polyisocyanates containing

Blocked polyisocyanates containing amide/imide groups and their use in

The present invention relates to a polyurethane powder coating composition containing

Polyurethane powder coating compositions which have a low stoving

The present invention relates to a powder coating composition for the production of matt coatings containing as binder

Matt polyurethane powder coatings and their use for coating heat

The present invention relates to a powder coating composition for the production of matte coatings, containing

Powder coating composition and its use for the preparation of matte

The present invention relates to novel polysiloxane-polyether-based copolymers which contain T units and comprise randomly linked organopolysiloxane units and linear polyether units, to a method for their preparation and their use.

Branched polysiloxane-polyether-based copolymers, their preparation and

The present invention relates to polyaddition compounds that are solid below 40.degree. C. and liquid above 125.degree. C. and contain, based on the weight of the polyaddition compounds,

Uretdione powder coating cross-linking agents having a low melt viscosity

Polyisocyanate polyaddition products which are solid below 40.degree. C. and liquid above 125.degree. C., contain uretdione and urethane groups and have a content of at least 1 wt. % of urethane groups obtained from the reaction of dimeric diols with isocyanate groups; a method of producing the these products by the reaction of polyisocyanates containing uretdione groups with dimeric diols; and the use of these polyaddition compounds as the starting component in the manufacture of polyurethane plastics, particularly as the cross-linking component in thermally cross-linkable two-component polyurethane powder coating compositions.

Dimeric diol-modified powder coating cross-linking agents containing

Polyisocyanate-modified dicarboxylic (poly)anhydrides which are solid below 40.degree. C., liquid above 120.degree. C. and based on the reaction product of organic polyisocyanates with more than equivalent quantities, based on the NCO/COOH reaction, of dicarboxylic (poly)anhydrides containing free carboxyl groups and optional subsequent modification of the reaction product with less than equivalent quantities, based on the anhydride groups, of anhydride-reactive amino and/or hydroxyl groups; and powder coating compositions containing as binder these polyisocyanate-modified dicarboxylic (poly)anhydrides as curing agents for polyepoxides.

Polyisocyanate-modified dicarboxylic (poly) anhydrides

Growing community of inventors

Leverkusen, Germany

Hans-Ulrich Meier-Westhues