Bayer Aktiengesellschaft

Bayer Aktiengesselschaft

Wolfhart Wieczorrek

Josef Pedain

Joachim Probst

Adolf Schmidt

Peter Hohlein

Hanns P Muller

Heinrich Alberts

Harald Blum

Lutz Schmalstieg

Klaus Nachtkamp

Walter Schafer

Manfred Bock

Bruno Bomer

Eberhard Konig

Oswald Wilmes

Gerhard Mennicken

Beate Baumbach

Klaus Schuster

Werner Drouve

Randall Dearth

Peter Hihlein

The present invention relates to aqueous polyurethane coating compositions wherein the binder contains

Coating compositions for glass substrates

Suspensions of solid polyisocyanates inactivated on the surface of adduct formation in organic, isocyanate reactive compounds as continuous phase, which suspensions are stable in storage at room temperature and heat curable and optionally contain auxiliary agents and additives, the continuous phase containing at least 10% by weight of ether group- and ester group-containing polyhydroxyl compounds having an (average) hydroxyl functionality of from 0.5 to 3 and an (average) hydroxyl number of from 15 to 150 constituting esterification products of (i) polyether polyols having an (average) hydroxyl functionality of from 3 to 8 and an (average) hydroxyl number of from 200 to 1000 with (ii) from 40 to 90 equivalents percent of inorganic monocarboxylic acids and the use of these suspensions for the production of coatings, adhesives or sealing compounds, in particular as underseal and doorseal compounds for motor vehicles.

Polyisocyanate suspensions in isocyanate reactive compounds and their use

The present invention relates to isocyante prepolymers containing ether and ester groups, having an isocyanate content of 1.9% to 25% by weight and based on the reaction product of

Isocyanate prepolymers containing ether and ester groups a process for

Water-dilutable binders for water-dilutable lacquers, coating compositions or sealing compounds consist essentially of a mixture of 5 to 40 parts by weight of a crosslinker resin and 60 to 95 parts by weight of a copolymer containing carboxyl groups or acid anhydride groups or both and further containing hydroxyl groups, and wherein the carboxyl or acid anhydride groups have been at least partially converted into carboxylate groups to the degree necessary to provide solubility or dispersibility of the binder in water and said copolymer is obtained by copolymerizing an alpha, beta-unsaturated carboxylic acid, a hydroxyalkyl acrylate or methacrylate, an olefinic monomer, a hydroxy-free acrylate or methacrylate and, optionally other mono-or polyunsaturated monomer, and wherein at least 30% of the hydroxyl groups of the copolymer are modified by esterification with a lactone.

Water-dilutable binders, a process for their production and their use

An improved coating for heat resistant substrates is an aqueous dispersion of polymers prepared by polymerization of olefinically unsaturated monomers in an aqueous medium in the presence of radical formers and emulsifiers, wherein the emulsifiers are polyisocyanate addition products having a molecular weight below 20,000 and containing from 5 to 1000 milliequivalents of anionic structures corresponding to the following formula

Process for the preparation of aqueous polymer dispersions the

Aqueous polymer dispersions useful for coating substrates are prepared by polymerization of olefinically unsaturated monomers in aqueous medium in the presence of radical formers and hydrophilically modified, urethane-group-containing emulsifiers having an average molecular weight below 30,000, wherein the urethane-group-containing emulsifiers are oligourethanes having a branched molecular structure which

Process for the production of aqueous polymer dispersions, the

The invention relates to a new process for the shatterproof coating of glass surfaces by coating the surfaces with a coating composition based on a two-component system reacting fully to form a polyurethane, the glass surfaces to be coated being coated before application of the coating composition with a physically drying priming lacquer containing a silane adhesion promoter and a catalyst which accelerates hardening of the coating composition and, as binder, a polyurethane polyurea which has a linear molecular structure and which is soluble in lacquer solvents.

Process for the shatterproof coating of glass surfaces

Growing community of inventors

Cologne, Germany

Wolfhart Wieczorrek