Patent ID: 6051674
Filing Date: 2000-04-18
Classification: C08G,C09D

Abstract:
A compound having blocked isocyanate functionality, the compound having the blocked isocyanate functionality being formed by reacting a blend of a compound having an average isocyanate functionality of from about 1 to about 4 isocyanate groups per molecule and a phenolic ester alcohol having at least one aliphatic hydroxyl group and at least one phenolic hydroxyl group, the compound having isocyanate functionality reacting with the phenolic hydroxy group of the phenolic ester alcohol, the compound with the isocyanate functionality being blocked with a phenolic blocking group from the phenolic ester alcohol, the isocyanate functionality being blocked with the phenolic blocking group through the phenolic oxygen on a phenyl ring of the phenolic blocking group, wherein the phenolic blocking group has the general formula ##STR31## wherein R.sub.4 is selected from the group consisting of hydrogen, halogen, hydroxyl, C.sub.1 to C.sub.8 alkyl and C.sub.1 to C.sub.8 alkoxy,R.sub.5 is selected from the group consisting of a direct bond, C.sub.1 to C.sub.20 organic radical having only carbon and hydrogen atoms, and a C.sub.1 to C.sub.20 organic radical which includes in its structure a substitution group selected from the group consisting of phenol, aliphatic hydroxyl, ester, ether, carbonate and combinations thereof,R.sub.6 is selected from the group consisting of hydrogen, a C.sub.1 to C.sub.20 organic radical, and a C.sub.1 to C.sub.20 organic radical which includes in its structure at least one ester linkage or a direct bond which forms with R.sub.7 part of a 5 or 6 carbon atom cyclic ring structure,R.sub.7 is CH.sub.2 R.sub.8 wherein R.sub.8 is selected from the group consisting of hydroxy, OR.sub.9, ##STR32## and R.sub.11, wherein R.sub.9 is selected from the group consisting of a primary or secondary aliphatic group containing 3 to 20 carbon atoms, an aromatic group containing 6 to 20 carbon atoms, a primary aliphatic group containing 3 to 20 carbon atoms which includes at least one ester linkage and a secondary aliphatic group containing 3 to 20 carbon atoms which includes at least one ester linkage,wherein R.sub.10 is selected from the group consisting of a primary aliphatic group containing 4 to 20 carbon atoms, a secondary aliphatic group containing 4 to 20 carbon atoms, a tertiary aliphatic group containing 4 to 20 carbon atoms, an aromatic group containing 6 to 20 carbon atoms, and combinations thereof, wherein the primary, secondary and tertiary aliphatic groups include at least one ester linkage; andwherein R.sub.11 is selected from the group consisting of a C.sub.2 to C.sub.20 organic radical, a C.sub.2 to C.sub.20 organic radical which includes in its structure at least one ester linkage, a C.sub.2 to C.sub.20 organic radical which forms with R.sub.6 part of a 5 or 6 carbon atom cyclic ring structure, and combinations thereof, the phenolic blocking group after the reaction having its at least one aliphatic hydroxyl group unreacted with the compound having isocyanate functionality.