Bayer Materialscience Ag

Bayer Aktiengesellschaft

Covestro Deutschland Ag

Bayer Innovation Gmbh

Bayer Intellectual Property Gmbh

Thorsten Rische

Thomas Feller

Karin Naujoks

Jürgen Meixner

Christoph Gürtler

Jan Mazanek

Tillmann Hassel

Michael Mager

Thomas Münzmay

Rolf Gertzmann

Stefan Sommer

Burkhard Fugmann

Hans Georg Grablowitz

Gerald Kurek

Uwe Klippert

Torsten Pohl

Erhard Luehmann

Holger Casselmann

Melita Dietze

Alfred Zastrow

Ralf Werner

Detlef-Ingo Schütze

Michael Heckes

Harald Blum

Jan Weikard

Lutz Schmalstieg

Sebastian Dörr

Wolfgang Henning

Harald Kraus

Christoph Irle

Meike Niesten

Steffen Hofacker

Wolfgang Arndt

Henricus Peerlings

Jürgen Köcher

Thomas Michaelis

Knut Panskus

Rüdiger Musch

Evgeny Avtomonov

Detlef-Ingo Sch&uuml;tze

Christoph G&uuml;rtler

Jan Schönberger

Daniel Rudhardt

Juergen Meixner

Hans-Peter Klee

Reiner Witkowski

Jürgen Lippemeier

Eberhard König

J&uuml;rgen Urban

Erhard Lühmann

Jürgen Urban

Anne Urban, Legal Representative

Roland Komorek

Eva Urban, Legal Representative

Juergen Urban

Detlev-Ingo Schütze

The present invention relates to a process for the preparation of low-viscosity, radiation-curable, aqueous dispersions based on polyurethane acrylates (UV-PUDs), wherein the UV-PUDs hydrophilized via hydroxy-functionalized carboxylic acids have a lower initial viscosity when a large part of the urethanization, that is to say the reaction of the NCO-functionalized compounds with the OH-functionalized compounds, initially takes place in the absence of the acid-carrying compounds and the incorporation of the acid-carrying compounds via their hydroxyl function takes place as late as possible.

Low-viscosity polyurethane acrylate dispersions

The invention relates to a method for producing aqueous polyurethane-polyurea dispersions, aqueous polyurethane-polyurea dispersions produced by this method and their use to produce coating agents and adhesives.

Aqueous polyurethane-polyurea dispersions

The present invention relates to radiation-curable coating compositions based on tin-free aqueous polyurethane dispersions based on polyurethane acrylates (i), characterized in that the polyurethane acrylate (i) comprises as builder components A) one or more compounds with at least one group which is reactive towards isocyanate and at least one unsaturated group which can undergo free radical polymerization, B) one or more compounds which differ from A) and have at least one group which is reactive towards isocyanate, C) one or more compounds with at least one group which is reactive towards isocyanate and additionally at least one group having a hydrophilizing action, D) one or more organic polyisocyanates, which are reacted in the presence of F) bismuth(III) salt(s) and G) an acid having a pKa of &#x3c;2.5, and a process for the preparation thereof, the use of the coating compositions as lacquers and/or adhesives, and objects and substrates provided with these lacquers and/or adhesives.

Tin-free aqueous polyurethane dispersions

The invention relates to a process for producing polyurethane foams, by frothing and drying mixtures of specific polyurethane dispersions and crosslinkers.

Production of polyurethane foams

The present invention relates to biomedical foam articles for the wound sector which are formed by spraying a polymeric dispersion onto a wound. The polymeric dispersion being sprayed onto a wound surface forms a three-dimensional body which conforms to the spatial shape of the wound and which, as well as covering the wound surface, ensures a complete and accurately fitted packing of the wound in the depth dimension as well as the other dimensions. The biomedical foam articles of the present invention are particularly useful for treating chronic wounds.

Biomedical foam articles

An aqueous polymer dispersion that includes a) a polyurethane dispersion having an average particle size of 60 to 350 nm and b) an aqueous silicon dioxide dispersion having a particle diameter of the SiOparticles of 20 to 400 nm. The dispersion is prepared by mixing the polyurethane dispersion (a) with the silicon dioxide dispersion (b). The aqueous polymer dispersion can be used in adhesive compositions, which can be used to bond substrates together, especially substrates that are structural components of shoes.

Aqueous adhesive dispersions

The present invention relates to aqueous non-ionically hydrophilised binding-agent dispersions based on polyurethane ureas with terminal polyethylene-oxide groups, to the preparation thereof, and to the use thereof for producing coatings.

Non-ionically hydrophilised binding-agent disperisions

The invention relates to a method for coating sheet-form textile materials, in which there is applied to a sheet-form textile material an aqueous dispersion containing anionically modified polyurethane ureas comprising (A) aromatic diisocyanate, (B) polyether polyol having a mean molecular weight greater than 1500, (C) at least one compound containing from 1 to 2 isocyanate-reactive groups and at least one ionogenic group, (D) polyamine having a mean molecular weight of at least 32, and (E) water, wherein the mean total functionality of the isocyanate-reactive compounds B to D is from 1.85 to 2.2, the molar ratio of the isocyanate groups of component A to the isocyanate-reactive groups of components B to D is greater than 1, and the polyurethane ureas have a content of from 800 to 1500 mmol of urethane groups/kg of anionically modified polyurethane urea and a content of from 800 to 1800 mmol of urethane plus urea groups/kg of anionically modified polyurethane urea.

Aqueous dispersion of anionically modified polyurethane ureas for coating a sheet-form textile material

The invention relates to water-dilutable, hydroxy-functional polyurethanes containing amide structural units, to a process for preparing them, to aqueous coating compositions prepared from them, and to their use for coating substrates.

Aqueous coating compositions based on polyurethane dispersions

Coating compositions that are stable to thermal yellowing that include coating materials containing I) one or more dispersions of hydroxyl-free polyurethanes and/or polyurethane-ureas, II) one or more aqueous solutions or dispersions of ionically modified, hydroxyl-containing polyurethanes and/or polyurethane-ureas, other than the constituents of component I), and III) at least one crosslinker. The dispersions are obtained by A) preparing an NCO-containing polyurethane prepolymer by reacting polyisocyanates with polymeric polyols and/or polyamines having number-average molecular weights of 400 to 8000 g/mol, isocyanate-reactive, ionically or potentially ionically hydrophilicizing compounds and/or isocyanate-reactive nonionically hydrophilicizing compounds; B) either dissolving the prepolymer obtained from step A) in aliphatic ketones or, diluting the prepolymer solution if the preparation has already been carried out in the presence of A6) by further addition of aliphatic ketones, and C) reacting the remaining free NCO groups of the prepolymer with a chain extender component.

Coating material composition

The present invention relates to new hydrophilicized blocked polyisocyanates, a process for preparing them and their use.

Hydrophilicized blocked polyisocyanates

Novel sizing compositions, their preparation and use. The compositions contain water-dispersible and/or water-soluble and alkylamine-blocked polyisocyanates, film-forming resins, coupling agents and lubricants. The isocyanates are synthesized from at least one polyisocyanate, at least one ionic and/or potentially ionic and/or nonionic compound, and at least one blocking agent which is at least 20% by weight aralkylamines.

Sizing composition

The present invention relates to a binder composition containing  The polyurethane dispersions are manufactured in the presence of components a) and b). It is possible for components a) and b), depending on the grade used, to be incorporated into the polymer framework as structural units. For this reason binder compositions comprising  The present invention also relates to a process for the preparation of these binder compositions. Further, the present invention relates to coating, adhesive and sizing compositions containing the binder compositions according to the invention. Finally, the present invention also relates to glass fibers sized with sizing compositions containing the binder compositions according to the invention.

Stabilized aqueous polyurethane-polyurea dispersions

The present invention relates to a water vapor-permeable coating composite containing one or more flexible substrates, which are coated on one or both sides with one or more identical or different coating compositions, provided that at least one coating composition contains, as binder, a silica sol-modified aqueous polymer dispersion prepared from unsaturated monomers.

Water vapor-permeable coating composite

The present invention relates to new hydrophilic polyurethane prepolymers and to their aqueous polyurethane-polyurea (PU) dispersions.

Hydrophilic polyurethane-polyurea dispersions

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Unna, Germany

Thorsten Rische