Bayer Aktiengesellschaft

Bayer Materialscience Ag

Agfa-gevaert Ag

Bayer Intellectual Property Gmbh

Bayeraktiengesellschaft

Bayer Innovation Gmbh

Covestro Deutschland Ag

Michael Mager

Steffen Hofacker

Burkhard Fugmann

Michael Ludewig

Wolfgang Podszun

Christian Wamprecht

Burkhard Kohler

Friedrich Jonas

Christoph Gürtler

Serge M Tavernier

Knud Reuter

Frank Richter

Markus Mechtel

Harald Kraus

Melita Dietze

Mathias Matner

Joachim Simon

Thorsten Rische

Nusret Yuva

Jorg-Dietrich Jentsch

Udo Guntermann

Aloys Eiling

Thomas Stingl

Malte Homann

Michael Heckes

Lothar Puppe

Stephan Kirchmeyer

Sebastian Dörr

Michael Schelhaas

Burkhard Köhler

Helmut-Martin Meier

Klaus Wussow

Thomas Münzmay

Johan Kijlstra

Rolf Gertzmann

Ludger Heiliger

Meike Niesten

Thomas Feller

Heike Windisch

Arno Nennemann

Sigurd Becke

Thomas Klimmasch

Stefanie Eiden

Volker Wege

Christoph Schild

Uwe Denninger

Jan Schönberger

Daniel Rudhardt

Kamelia Detig-Karlou

Hermann-Jens Womelsdorf

Christoph Gurtler

Raf Voets

Martin Schloh

Thiemo Marx

Karl-Heinz K&auml;sler

Rainer Bellinghausen

Johannes Eickmans

J&uuml;rgen Kirsch

Karsten Dierksen

The present invention provides novel polyurethane-based wound dressing foams, obtained by foaming and curing silane-terminated polyurethanes.

Production of polyurethane foams for wound management

Processes comprising: (a) providing a composition comprising at least one silane-terminated polyurethane preploymer prepared by a process comprising: reacting (A) at least one polyether having a number average molecular weight (Mn) of 2000 to 8000 g/mol, and comprising 10 to 30 wt % ethylene oxide units based on all alkylene oxide units in the polyether; with (B) at least one isocyanate and alkoxysilane group-containing compound of the formula (I): wherein each of X, Y, and Z independently represents a C-Calkyl or a C-Calkoxy residue, with the proviso that at least one of X, Y, and Z represents a C-Calkoxy group; and wherein R is an at least bifunctional, organic residue; (b) foaming the composition, and (c) curing the foamed composition in the presence of water; and uses of polyurethane foams prepared thereby.

Processes for producing polyurethane foams containing alkoxysilane functional polymers and uses therefor

The present invention relates to aqueous binder dispersions based on silane-modified polymeric binders and inorganic nanoparticles, a process for the preparation thereof and the use thereof for the production of high quality coatings, in particular clear lacquers.

Binders containing nanoparticles

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

The invention concerns novel hydrogels, a process for the preparation of these hydrogels and would contact materials comprising these hydrogels. These polyurethane hydrogels are obtained by the reaction of aliphatic isocyanate prepolymers with polyols comprising tertiary nitrogen in water.

Hydrogels based on aliphatic NCO prepolymers

The present invention relates to innovative, nanoparticle-modified polyisocyanates, a process for their preparation and to their use in coating compositions and adhesives. The process comprises the steps of 1) reacting A) polyisocyanates with B) alkoxysilanes, and subsequently 2) incorporating by dispersion inorganic particles, optionally surface modified, having an average particle size of less than 200 nm as determined by means of dynamic light scattering in dispersion, where the alkoxysilanes are according to formula (I)Q-Z&#x2014;SiXY&#x2003;&#x2003;(I)in which Q is an isocyanate-reactive group, X is a hydrolysable group, Y is identical or different alkyl groups, Z is a C-Calkylene group and a is an integer from 1 to 3.

Nanoparticle-modified polyisocyanates

Processes for preparing polyurethane hydrogels which include free-radically cross-linking: A) hydrophilic polyurethanes having one or more olefinically unsaturated groups selected from the group consisting of acrylate and methacrylate groups; in the presence of B) water; and C) a redox system including a water-soluble oxidizing agent and a water-soluble reducing agent, the oxidizing agent being capable in terms of redox potential of reacting with the water-soluble reducing agent by free-radical formation, wherein the hydrophilic polyurethanes are based on hydroxyl-functional polyalkylene oxides.

Hydrogels of hydrophilic polyurethane (meth)acrylates

The present invention relates to two-component coating systems for producing flexible coatings. The coating systems comprise polyurethane prepolymers with allophanate structures and also amino-functional polyaspartic esters as curing agents.

Two-component systems for producing flexible coatings

The present invention relates to a process for preparing amino-functional polyurethane prepolymers by The present invention also relates coatings, adhesives, sealants, casting compounds or moldings obtained from these amino-functional polyurethene prepolymers. Finally, the present invention relates to reactive systems containing the amino-functional polyurethane prepolymers, compounds containing on average more than one oxirane group per molecule, and optionally organic amines and additives.

Amino-functional polyurethane prepolymers and a process for their preparation

The present invention relates to novel polyurethane prepolymers (PU prepolymers) of low viscosity containing NCO groups blocked with compounds containing phenol groups and to their use for producing polyurethane polymers. The PU prepolymers are prepared by reacting one or more diisocyanates or polyisocyanates with at least one isocyanate-reactive compound with a functionality of at least 1.5 to form an NCO-functional polyurethane prepolymer and subsequently blocking the free NCO groups with at least one hydrocarbon resin containing phenolic OH groups and/or one optionally substituted phenol in the presence of a catalyst which comprises at least one triorganoamine.

Phenolically blocked polyurethane prepolymers

The invention relates to novel blocked polyurethane prepolymers, to a process for their preparation, to reactive systems prepared therefrom that cure at room temperature, and to their use.

Reactive systems, their preparation and their use

A process for preparing polyisocyanate prepolymers containing allophanate structural units that includes reacting

Polyether allophanates stable towards discolouration

The invention relates to a plastic article with a coating containing at least one zinc oxide-containing layer and at least one abrasion-resistant outer layer.

Plastics stabilized with zinc oxide-containing, abrasion-resistant multilayers

The present invention relates to compositions containing inorganic UV absorbers and to coatings produced therefrom for the long-term protection of materials, especially plastics, against photochemical degradation.

Compositions comprising inorganic UV absorbers

Growing community of inventors

Leverkusen, Germany

Michael Mager