1. A PROCESS WHICH COMPRISES COATING THE SURFACE OF AN ORGANIC POLYMERIC STRUCTURE HAVING AN ACTIVE-HYDROGEN-CONTAINING SURFACE WITH A COMPOSITION CONTAINING AT LEAST ONE ORGANIC COMPOUND HAVING A PLURALITY OF ISOCYANATE GROUPS AND AT LEAST ONE BENZOYL COMPOUND, SAID BENZOYL COMPOUND HAVING SUBSTITUTED THEREIN AT LEAST ONE ORTHO-HYDROXYL GROUP AND AT LEAST ONE ADDITIONAL ACTIVEHYDROGEN-CONTAINING GROUP BESIDES SAID HYDROXYL GROUP, THE RATIO OF THE NUMBER OF GRAM EQUIVALENTS OF ISOCYANATE GROUPS IN SAID ORGANIC COMPOUND TO THE NUMBER OF GRAM EQUIVALENTS OF ACTIVE-HYDROGEN ATOMS IN SAID ADDITIONAL ACTIVE-HYDROGEN-CONTAINING GROUPS OF SAID BENZOYL COMPOUND BEING AT LEAST 1:20, AND CAUSING SAID STRUCTURE, SAID ISOCYANATE COMPOUND AND SAID BENZOYL COMPOUND TO INTERREACT.