A single- or multicomponent polyurethane composition containing polyisocyanate and tannin as contact adhesive useful as a surface coating material and as a contact adhesive in a polyurethane-containing surface coating material

摘要

A single- or multicomponent polyurethane composition containing at least one polyisocyanate and a proportion of tannin acting as a contact adhesive is new. An Independent claim is included for preparation of the composition by mixing the tannin with the polyisocyanate.