Bayer Aktiengesellschaft

Bayer Aktiengellschaft

Graboplast

Walter Schroer

Wilhelm Thoma

Josef Pedain

Klaus Nachtkamp

Rolf Langel

Klaus Noll

Waldemar Kling

Helmut Reiff

Gerhard Berndt

Kuno Wagner

Dieter Dieterich

Manfred Dietrich

Harro Traubel

Eberhard Konig

Jurgen Grammel

Karl-Arnold Weber

Karl H Pisaric

Anton Schmitz

Gyula Wlasitsch

Joseph Pedain

Karl Berger

The present invention relates to heat-curable coating compositions containing

Heat-curable coating compositions

The present invention is directed to coating compositions (pastes) containing

Coating materials containing PUR dispersions and solvents and their use

The present invention is directed to a heat hardenable coating composition containing

Heat hardenable coating composition based on polyurethane urea and

The present invention is directed to polyurethane ureas which may be obtained by the reaction of a hydrophilic NCO prepolymer, which has been prepared from a polyhydroxy component based on about 9 to 100% by weight of a polyether containing about 30 to 100% by weight of ethylene oxide, or a mixture of this hydrophilic NCO prepolymer and a hydrophobic NCO prepolymer, the mixture containing .gtoreq.30% by weight of the hydrophilic prepolymer, with an aldimine or ketimine-containing hardener mixture in the presence of water and organic solvents, approximately 30 to 70% of the NCO groups of the prepolymers being reacted with the amino groups of the hardener and the remainder reacting with water. The present invention is also directed to a process for the preparation of these polyurethane ureas and to coated substrates prepared from these polyurethane ureas.

Polyurethane ureas

The present invention is directed to aqueous coating compositions suitable for use as coating and finishing agents for surface coatings, preferably PVC or polyurethane coatings, based on sedimentation-stable polyurethane dispersions having a solids content of about 10-70% by weight wherein the polyurethane-urea solids material is based on polyester diols, low molecular weight diols and optionally triols, chemically incorporated hydrophilic groups, specific mixtures of diisocyanates and polyamine chain extenders having an average functionality of greater than 2 and wherein the aqueous preparations additionally contain alkoxylated dimethyl-polysiloxanes and water-soluble polyethylene oxides. The present invention is also directed to a process for applying top coats and finishes to surface coatings, preferably PVC or polyurethane surface coatings, wherein the above-described aqueous coating and finishing agents are used as the top coat and the coatings are cured at about 70.degree.-170.degree. C.

Polyurethane dispersions and the use thereof as finishing agents

This invention relates to spreading pastes containing polyurethanes which are prepared from special synthesis components selected from the group of silicone resins, polyethers or polyesters containing aromatic segments or perfluorocarbon resins. The spreading pastes also contain organic solvents and optionally non-solvents for the polyurethanes so that when the coatings are used to coat textile substrates according to the direct or transfer process, the coatings may be cured based on the principle of evaporation coagulation.

Spreading pastes containing polyurethane plastics and a process for the

The present invention is directed to the preparation of optionally pigmented spreading paste based on multiphase mixtures of ionically-modified polyurethanes and/or polyurethane ureas which are prepared from special synthesis components based on silicone resins, aromatic hydroxypolyethers, aromatichydroxy polyesters, and perfluorocarbon resins, the multiphase mixtures additionally containing water and organic solvents for the polyurethanes and/or polyurethane ureas. The present invention is also directed to the preparation of these optionally pigmented spreading pastes and to their use for the production of coatings permeable to water vapor on fabric or leather substrates by the direct or transfer method using the technique of evaporation.

Ionically modified pur spreading pastes and their use

This invention relates to a process for multiple-coat reverse coating using at least two different polyurethane coating solutions, all the coating solutions containing one and the same polar solvent, preferably substantially anhydrous dimethyl formamide. By choosing

Process for multiple-coat reverse coating using polyurethane solutions

This invention relates to PU-coating compositions containing solvent and combinations of crosslinking agents and to a process for producing polyurethane coatings on the principle of heat-activated, one-coat reverse coating by knife-coating the polyurethane coating composition onto a temporary support, drying the layer and laminating the textile substrates using preferably heated pressure rollers, followed by heating at elevated temperatures, the coating compositions used being solvent-containing, 20 to 60% compositions of a polyurethane mixture I containing

Coating compositions containing solvents and crosslinking agents and

This invention relates to coating compositions based on aqueous polyurethane dispersions, as well as the use of the coating compositions for the production of top coats or finishes on flexible substrates, particularly on PVC. The present coating agents contain an aqueous polyurethane dispersion having certain physico-chemical properties and the following composition of the solid substance:

Coating agents of polyurethane dispersions and the use thereof for top

The present invention is directed to aqueous dispersion compositions in the form of aqueous, spreadable coating or printing pastes, characterized in that they contain

Dispersion compositions, a process for their production and their use

This invention relates to compositions of aqueous polyurethane dispersions containing polyurethanes having lateral OH-groups, optionally in admixture with PU-dispersions without any lateral OH-groups, which contain a combination of formaldehyde resins and blocked polyisocyanates as crosslinking agent and, optionally handle-improving agents, silicones and standard additives. The present invention also relates to the use of these compositions for the production of light coatings by the heat-activated, one-coat reverse coating process, in which the PU-composition is applied to a temporary support and dried, after which the (textile) substrate is laminated onto the dry polyurethane film at elevated temperature and pressure and the polyurethane laminate formed is subsequently crosslinked at a relatively high temperature. Mixed crosslinking with formaldehyde resins plus blocked polyisocyanates makes it possible to obtain coatings characterized by outstanding substrate adhesion and wet strength values.

Aqueous polyurethane compositions containing crosslinking agents and

A bonded composite laminate is provided comprising a textile layer and a plastic film which contains polyurethane urea coating which laminate is suitable for lining and repair of pipelines and canalizations.

Growing community of inventors

Leverkusen, Germany

Walter Schroer