Bayer Aktiengesellschaft

Bruno Zorn

Harro Traubel

Josef Pedain

Klaus Konig

Hans Rudolph

Hans J Rosenkranz

Klaus Noll

Karl Fuhr

Hans Muller

Karl-Ernst Schuster

Rosemarie Schmid

The present invention is directed to a process for the production of high-gloss patent leather from two-component polyurethane compositions by reacting hydroxyl group-containing oligourethanes with polyisocyanates, characterized in that the oligourethanes have been synthesized from

Process for the production of patent leather and patent leather prepared

A radiation-hardenable binder consisting of a reaction product of:

Radiation-hardenable binders based on thio-polyols

This invention is concerned with a process for producing microporous coatings comprising (1) mixing an NCO-prepolymer prepared from polyisocyanates with compounds containing at least two isocyanate-reactive hydrogen atoms with about 3 to 40% by weight, based on the NCO-prepolymer, of a substantially inert, non-migrating liquid organic compound miscible with said NCO-prepolymer as a plasticizer; (2) adding about 3 to 300 weight % of water, based on the NCO-prepolymer, into the NCO-prepolymer-plasticizer mixture to form a water-in-oil emulsion; (3) adding a polyamine in a quantity substantially equivalent to the isocyanate groups; (4) applying a coating of the water-in-oil emulsion to a substrate; and (5) hardening the coating by evaporating the chemically unbound water from said coating.

Reactive polyurethane coatings

Growing community of inventors

Cologne, Germany

Bruno Zorn