Polyurethane resin coating composition containing carbamyl chloride stabilizer

Claim 1

A STABLE, AIR-DRYING LIQUID ORGANIC COATING COMPOSITION CONSISTING ESSENTIALLY OF A SOLUTION IN AN INERT, VOLATILE ORGANIC SOLVENT OF A POLYURETHANE REACTION PRODUCT OF (A) 1 MOL OF POLYALKYLENE GLYCOL HAVING A MOLECULAR WEIGHT OF ABOUT 500-3000 AND BEING A MEMBER OF THE CLASS CONSISTING OF POLYPROPYLENE GLYCOL AND MIXTURES CONTWINING AT LEAST 85 MOL PERCENT THEREOF WITH AT LEAST ONE MEMBER OF THE CLASS CONSISTING OF POLYETHYLENE GLYCOL AND POLYBUTYLENE GLYCOL, (B) UP TO 1 MOL OF SATURATED ALPHATIC DIOL CONTAINING 2-6 CARBON ATOMS PER MOLECULE, (C) 0.5-4.0 MOLS OF SATURATED ALPHATIC TRIOL CONTAINING 3-6 CARBON ATOMS PER MOLECULE AND (D) ORGANIC DIISOCYNATE IN AN AMOUNT SUFFICIENT TO PROVIDE 1.5-2.4 ISOCYNATE GROUPS FOR EACH HYDROXYL GROUP PROVIDED BY COMPONENTS (A), (B), AND (C); SAID POLYURETHAN REACTION PRODUCT BEING PREPARED IN THE PRESENCE OF FROM 0.0003% TO 0.06% BY WEIGHT BASED ON SAID ORGANIC DIISOCYNATE OF CHLORINE IN THE FORM OF CARBAMYL CHLORIDE, WITH SAID SOLUTION FURTHER CONTAINING FROM 0.05 TO 2.0% BY WEIGHT BASED ON THE WEIGHT OF SAID POLYURETHANE REACTION PRODUCT OF N,N-DIMETHYL DODECYLAMINE.