Abstract: The present invention is directed to a polyester polyol having a molecular weight between about 850 and 2000, a functionality of about 5 to 9 and an OH number of about 200 to 350, based on 100% solids, which is prepared by reacting(a) an acid component based on at least one polyfunctional cycloaliphatic or aromatic carboxylic acid, anhydride or ester and optionally up to about 50 percent by weight of at least one acyclic, polyfunctional carboxylic acid and(b) a hydroxyl component containing at least a portion of at least one polyol having a functionality of at least 3.The present invention is also directed to a process for preparing these polyester polyols by reacting the above components and is further directed to the use of these polyester polyols in combination with organic polyisocyanates for the production of polyurethanes, particularly polyurethane coatings.

Abstract: The present invention is directed to a process for improving the storage stability of a composition which contains(a) a blocked polyisocyanate prepared by blocking the isocyanate groups of an organic polyisocyanate with a blocking agent comprising a di-C.sub.1 -C.sub.12 -alkyl and/or -alkoxyalkyl malonate and(b) is free from compounds containing at least two isocyanate-reactive hydrogens, which comprises incorporating a stabilizing amount of a compound having monofunctional reactivity towards isocyanates into the composition.The present invention is also directed to the storage stable composition produced in accordance with the above process.

Abstract: The present invention is directed to a process for improving the storage stability of a composition containing(a) a blocked polyisocyanate component prepared by blocking the isocyanate groups of an organic polyisocyanate with a blocking agent comprising a di-C.sub.1 -C.sub.12 -alkyl and/or -alkoxyalkyl malonate and(b) a component comprising a compound containing at least two isocyanate-reactive hydrogens, which comprises incorporating a stabilizing amount of a compound having monofunctional reactivity towards isocyanates into the composition by adding said compound to component (a), component (b) or to the mixture of components (a) and (b).The present invention is also directed to the storage stable composition produced in accordance with the above process.

Abstract: A method for applying a polyurethane coating onto a substrate by employing a catalyzed coating composition comprising the steps:(1) Providing a coating composition comprised of:(A) a polyol composition comprising (1) a polymerized low molecular weight polyol selected from the group consisting of (a) polycaprolactone; (b) a copolymer of a compound of the formula CH.sub.2 .dbd.C(R)--R.sup.1 and allyl alcohol; and (c) mixtures thereof; (2) a saturated aliphatic polyol from 4 to 12 carbon atoms or a saturated cycloaliphatic polyol of from 5 to 8 carbon atoms per ring; wherein R is methyl, ethyl or hydrogen; R.sup.1 is a group having 6 to 12 carbon atoms containing an aromatic carbocyclic ring;(B) a polyisocyanate; wherein the ratio of NCO/OH of A and B ranges from about 0.9 to 1.

Abstract: A method for applying a polyurethane coating onto a substrate by employing a catalyzed coating composition comprising the steps:1. Providing a coating composition comprised of:A. a polyol composition comprising (1) a polymerized low molecular weight polyol selected from the group consisting of (a) polycaprolactone; (b) a copolymer of a compound of the formula CH.sub.2 .dbd.C(R)--R.sup.1 and allyl alcohol; and (c) mixtures thereof; (2) a saturated aliphatic polyol from 4 to 12 carbon atoms or a saturated cycloaliphatic polyol of from 5 to 8 carbon atoms per ring; wherein R is methyl, ethyl or hydrogen; R.sup.1 is a group having 6 to 12 carbon atoms containing an aromatic carbocyclic ring;B. a polyisocyanate; wherein the ratio of NCO/OH of A and B ranges from about 0.9 to 1.2; the coating composition having a range of solids content from about 40 to about 100% by weight; andC. a compatible polyurethane catalyst;2. Applying the coating composition to a substrate; and3.