PROCESS FOR THE PREPARATION OF OLIGOURETHANES CONTAINING FREE ISOCYANATE GROUPS, THE OLIGOURETHANES OBTAINABLE BY THIS PROCESS AND THEIRUSE AS BINDERS OR BINDER COMPONENTS IN MOISTURE HARDENING ONE-COMPONENT LACQUERS

摘要

PROCESS FOR THE PREPARATION OF OLIGOURETHANES CONTAINING FREE ISOCYANATE GROUPS, THE OLIGOURETHANES OBTAINABLE BY THIS PROCESS AND THEIR USE AS BINDERS OR BINDER COMPONENTS IN MOISTURE HARDENING ONE-COMPONENT LACQUERS The present invention is directed to a process for the preparation of an oligourethane and free isocyanate groups which soluble in aromatic solvents and suitable as a lacquer binder by reacting an organic diisocyanate with a high molecular polyol and a low molecular weight polyol which contains 2,2,4-trimethyl-pentane-1,3-diol, its ethoxylation and/or propoxylation products or addition products of this low molecular weight diol with .epsilon.-caprolactone. The present invention is also directed to oligourethanes produced by this process and to their use as the binder or binder component in moisture hardening one-component lacquers.