Patent ID: 8431730

Claim:
A curable coating composition comprising a total solids content of at least 50 percent, said coating composition being capable of acid catalyzed crosslinking and containing at least one active hydrogen-containing resin, at least one curing agent present externally and/or internally as a part of the active hydrogen-containing resin, optionally, at least one basic anticorrosive pigment, and a catalytic amount of at least one non-ionic ester of a sulfonic acid having the following structural formula (s): R is wherein, E is or a cycloalkyl having from 3 to 20 carbon atoms; R1 is hydrogen, carboalkoxy, C3-C20 alkyl, C6-C18 aryl, or C3-C20 cycloalkyl; R2 is hydrogen, carboalkoxy, C3-C20 alkyl, C6-C18 aryl, or C3-C20 cycloalkyl; R3 is hydrogen, carboalkoxy, acyloxy, N-alkylcarbamyloxy, N-arylcarbamyloxy, C3-C20 alkyl, C6-C18 aryl, or C3-C20 cycloalkyl; R4 is hydrogen, carboalkoxy, acyloxy, N-alkylcarbamyloxy, N-arylcarbamyloxy, C3-C20 alkyl, C6-C18 aryl, or C3-C20 cycloalkyl; R5 is hydrogen, carboalkoxy, acyloxy, N-alkylcarbamyloxy, N-arylcarbamyloxy, C3-C20 alkyl, C6-C18 aryl, or C3-C20 cycloalkyl R11 and R12 independently are the same or different and are linear or branched alkyl group having from 6 to 40 carbons; y″ is 0 to 3, z is 0 to 3, and y″+z is 1 to 4.