Bayer Aktiengesellschaft

Baker Aktiengesellschaft

Bayer Materialscience Ag

Wolfgang Kremer

Jurgen Meixner

Manfred Muller

Erhard L&uuml;hmann

Christoph Irle

Rolf Roschu

Lutz Schmalstieg

Hans-Joachim Traenckner

Joachim Probst

Martin Brahm

Hans-Josef Laas

Harald Blum

Jan Weikard

Werner Kubitza

J&uuml;rgen Meixner

Josef Pedain

Wolfgang Fischer

Christian Wamprecht

John W Goossens

Hans J Kreuder

Bernd Riberi

Theo Kempermann

Bernd Peltzer

Horst Clemens

Carl-Gerd Dieris

Johannes Beckers

Dieter Erdmann

G&uuml;nther Ruf

Heinz Kronke

Erhard Lühmann

The invention relates to an aqueous 2-component polyurethane (PU) coating composition comprising a vinyl polymer polyol dispersion, having a hydroxyl number between 10 and 264 mg KOH/g solid resin, an acid value (calculated from the sum of neutralized and non-neutralized acid groups) between 0 and 55 mg KOH/g solid resin, a number-average molecular weight M of at least 5000 g/mol and a weight average molecular weight M of at least 30,000 g/mol, a glass transition temperature of at least 20&deg; C. and an average particle diameter of no greater than 300 nm, which is prepared in the presence of 0.1 to 10.0 wt. %, relative to the sum of the solids contents of polymer polyol and polyisocyanate, of a non-ionic polyether surfactant and a polyisocyanate having a viscosity at 23&deg; C. of no more than 12,000 mPa*s and either a non-hydrophilic or a non-ionically or anionically hydrophilic character, whereby the equivalent ratio of isocyanate groups of component b) to hydroxyl groups of component a) is 0.2:1 to 5:1; a process for the preparation of such aqueous 2-component coating compositions, and their use as 2-component PU paints for painting any type of substrate.

Aqueous 2-component PU systems

This invention relates to binders for aqueous coatings, to a process for the production thereof and to the use thereof for lacquers and coatings.

Polyurethane dispersions

The present invention relates to radiation curable aqueous polyurethane dispersions containing 0.05 to 20 wt. %, based on the weight of the non-aqueous constituents of the aqueous polyurethane dispersions, of 2,2-dimethyl-3-hydroxypropionic acid-(2,2-dimethyl-3-hydroxypropyl ester), (HPSNPG, calculated as MW 204.3). The invention also relates to substrates coated with these polyurethane dispersions, in particular to coated wood substrates with good grain enhancing properties.

Aqueous polyurethane emulsions

Binder compositions and their use in aqueous coating and adhesive compositions

Polyurethane-polyacrylate hybrid dispersions containing allophanate groups

The present invention relates to storage stable, aqueous polyurethane-polyacrylate hybrid dispersions, which are self crosslinkable at room temperature and contain A) 10 to 95 wt. %, of a polyurethane dispersion,

Self crosslinkable polyurethane-polyacrylate hybrid dispersions

A process for the preparation of isocyanurate group-containing polyisocyanates in solvents which are inert towards isocyanate groups by reacting 0.2 to 1.5% of the isocyanate groups of diisocyanatotoluene with an aliphatic monohydric alcohol having 6 to 22 carbon atoms and subsequently trimerizing at least a portion of the isocyanate groups of the urethanized diisocyanates in the form of 40 to 70 wt. % solutions in lacquer solvents which are inert towards isocyanate groups, and the use of these polyisocyanates in two-component polyurethane coating compositions.

Process for preparing isocyanurate group-containing polyisocyanates and

Water-dispersible polyisocyanate compositions based on aliphatic and aromatic diisocyanates and having an NCO content, based on solids, of 6 to 21% by weight, a weight ratio of incorporated TDI units to incorporated HDI units of 6:1 to 0.1:1 and a content of ethylene oxide units, arranged within terminal polyether chains, of 5 to 40% by weight; a method for the preparation of these polyisocyanate compositions by reacting a polyisocyanate component with monovalent polyether alcohols containing ethylene oxide units at an NCO/OH equivalent ratio of 2:1 to 120:1; and aqueous coating compositions containing these polyisocyanate compositions and polyhydroxyl compounds as the binder.

Water-dispersible polyisocyanate compositions

A water-dispersible polyisocyanate composition obtained by the partial urethanization of the isocyanate groups of 2,4- and/or 2,6-diisocyanatotoluene with monohydric and polyhydric alcohols, a process for its production, its use as the binder for an aqueous two-component coating composition in combination with a water-soluble or water-dispersible polyhydroxyl component and coatings for water-resistant sheet-form substrates prepared from this coating composition.

Water-soluble or water-dispersible polyisocyanate composition, a process

The present invention relates to hydrophilic polyurethanes having a content of (i) olefinic double bonds (expressed as C.dbd.C, molecular weight 24) of at least 1.0% by weight and (ii) ethylene oxide units incorporated through polyethylene glycol of 20 to 80% by weight, which are based on the reaction product of

Hydrophylic, olefinically unsaturated polyurethanes and their use as

The present invention relates to a process for the production of olefinically unsaturated polyester resins containing at least 0.025 moles of urethane groups per 100 g of resin by reacting

Unsaturated urethanized polyester resins, a process for their production

Unsaturated polyester resins having an acid number of from 0 to 50 and a hydroxyl number of from 10 to 150 which are composed of 0.6 to 0.8 moles of groups derived from maleic and/or fumaric acid, 0.2 to 0.4 moles of groups derived from norbornene dicarboxylic acid, 0.6 to 0.8 moles of groups derived from ethylene and/or propylene glycol, 0.2 to 0.4 moles of groups derived from diethylene glycol, 0.1 to 0.2 moles of groups derived from benzylalcohol and/or benzoic acid and 0 to 0.2 moles of groups derived from other alcohols, a process for their manufacture by a solvent-free or azeotropic esterification of said monomers and compositions which can be cured under influence of UV radiation, containing from 40 to 80 parts by weight of said polyester resins, from 20 to 60 parts by weight of styrene from 0.5 to 5 parts by weight of at least one photoinitiator and optionally known auxiliary agents and additives.

Unsaturated polyester resins, a process for their preparation and

Opaquely pigmented coatings can be produced from lacquers based on monomer-free air-drying polyesters by means of UV radiation if hydroperoxides are additionally employed alongside UV initiators.

Process for the production of UV-hardened opaquely pigmented coatings

Unsaturated polyesters of defined composition with a low content of polyalkylene glycol radicals in a narrow molecular weight range can be dispersed in water without external emulsifiers. These dispersions produce, after hardening, water and chemical resistant coatings with good mechanical properties.

Growing community of inventors

Kerken, Germany

Wolfgang Kremer