Patent ID: 6159549
Filing Date: 2000-12-12
Classification: C08G,C09D

Abstract:
A coating composition which comprises:(a) a polyester-based resin component present in amount ranging from about 50 to about 70 weight percent, said polyester-based component comprising not more than one phosphatized polyester resin having a number average molecular weight ranging from about 3,000 to about 5,000;(b) an epoxy component present in amount ranging from about 5 to about 15 weight percent, said epoxy component comprising at least one phosphatized epoxy resin having a number average molecular weight ranging from about 500 to about 5,000;(c) a crosslinker component present in amount ranging from about 15 to about 25 weight percent, said crosslinker component comprising the isocyanurate of hexamethylene diisocyanate blocked with 2-butanone oxime;(d) a catalyst component present in amount ranging from about 1 to about 5 weight percent, said catalyst component comprising at least one catalyst compound selected from the group consisting of dibutyltindilaurate and dibutyltindiacetate; and(e) a diluent component present in amount ranging from about 60 to about 40 weight percent, said diluent component comprising at least one diluent compound selected from the group consisting of aromatic petroleum distillates, methyl ethyl ketone, methyl isobutyl ketone, alcohols, dimethyl phthalate, mono- and dialkyl ethers of ethylene and diethylene glycol;said weight percentages for components (a) through (d) are based on the total weight of the resin solids in the resulting coating composition; said weight percentages for component (e) is based on the total weight of the resulting coating composition; and said number average molecular weights for components (a) and (b) measured by gel permeation chromatography using the calibration curve of polystyrene standards.