Coating composition comprising a blend of polyurethane reaction products

Claim 1

A STABLE, CURABLE COATING COMPOSITION CONSISTING ESSENTIALLY OF A BLEND IN INERT SOLVENT OF (A) THE POLYURETHANE REACTION PRODUCT OF (1) ONE HYDROXYL EQUIVALENT OF AT LEAST ONE POLYOL SELECTED FROM THE GROUP CONSISTING OF POLYALKYLENE ETHER GLYCOLS AND POLYESTERS HAVING ESTER LINKAGES AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN, SAID POLYOL HAVING AN AVERAGE MOLECULAR WEIGHT OF ABOUT FROM 400 TO 3000, AN ACID NUMBER OF LESS THAN ABOUT 5 AND AN AVERAGE OF ABOUT 2 TO 3 FREE HYDROXYL GROUPS PER MOLECULE, AND (2) ABOUT 2 HYDROXYL EQUIVALENTS OF POLYOL CONSISTING OF SATURATED ALIPHATIC DIOL HAVING 2 TO 8 CARBON ATOMS WITH (3) ABOUT FROM 1.2 TO 2.0 ISOCYANATE EQUIVALENTS OF ORGANIC DIISOCYANATE FOR EACH HYDROXYL EQUIVALENT OF POLYOL AND (B) THE POLYURETHANE REACTION PRODUCT OF (1) ONE HYDROXYL EQUIVALENT OF MONOMERIC ALIPHATIC POLYOL HAVING AT LEAST 3 HYDROXYL GROUPS PER MOLECULE WITH (2) 1.5 TO 2.0 ISOCYANATE EQUIVALENTS OF ORGANIC DIISOCYANATE, SAID CHEMICALLY COMBINED POLYOL IN SAID COMPONENT (A) AND SAID CHEMICALLY COMBINED POLYOL IN SAID COMPONENT (B) BEING PRESENT IN A MOLE RATIO OF ABOUT FROM 6:1 TO 1:12.