Low VOC clear epoxy acrylic coating composition for basecoat clear coat finish

A coating composition comprising about 40-80% by weight, based on the weight of the coating composition, of binder in volatile organic solvent;

• wherein the binder consists essentially of about
• 40-95% by weight, based on the weight of the binder, of an epoxy acrylic polymer consisting essentially of polymerized monomers of at least one alkyl methacrylate having 2-12 carbon atoms in the alkyl group, a glycidyl methacrylate or glycidyl acrylate and 0.5-40% by weight of styrene and having a weight average molecular weight of about 3,000-10,000 and a glass transition temperature of about -20.degree. to +50.degree. C.;
• 5-60% by weight, based on the weight of the binder of an organic polyisocyanate crosslinking agent;
• and
• a sufficient amount of catalyst to cure the binder;
• and
• wherein the coating composition when cured has a water vapor permeability value of about 1400-3200;

A coating composition comprising about 40-80% by weight, based on the weight of the coating composition, of binder in volatile organic solvent;

• wherein the binder consists essentially of about
• 39-65% by weight, based on the weight of the binder, of an epoxy acrylic polymer consisting essentially of polymerized monomers of at least one alkyl methacrylate having 1-12 carbon atoms in the alkyl group and a glycidyl methacrylate or glycidly acrylate and having a weight average molecular weight of about 3,000-10,000 and a glass transition temperature of about -20.degree. to +50.degree. C.;
• 1--30% by weight, based on the weight of the binder, of a hydroxy acrylic polymer consisting essentially of polymerized monomers of at least two alkyl methacrylates having 2-12 carbon atoms in the alkyl group and a hydroxy alkyl methacrylate having 2-4 carbon atoms in the alkyl group and having a weight average molecular weight of about 3,000-10,000 and a glass transition temperature of about -20.degree. to +50.degree. C.;
• 5-60% by weight, based on the weight of the binder of an organic polyisocyanate crosslinking agent;
• and
• a sufficient amount of catalyst to cure the binder;
• and
• wherein the coating composition when cured has a water vapor permeability value of about 1400-3200.

A coating composition comprising about 40-80% by weight, based on the weight of the coating composition, of binder in volatile organic solvent;

• wherein the binder consists essentially of about
• 39-65% by weight, based on the weight of the binder, of an epoxy acrylic polymer consisting essentially of polymerized monomers of at least one alkyl methacrylate having 2-12 carbon atoms in the alkyl group, a glycidyl methacrylate or glycidyl acrylate
• and 0.5-40% by weight styrene and having a weight average molecular weight of about 3,000-10,000 and a glass transition temperature of about -20.degree. to +50.degree. C.;
• 1-30% by weight, based on the weight of the binder, of a hydroxy acrylic polymer consisting essentially of polymerized monomers of at least two alkyl methacrylates having 2-12 carbon atoms in the alkyl group, a hydroxy alkyl methacrylate having 2-4 carbon atoms in the alkyl group and 0.5-40% by weight styrene and having a weight average molecular weight of about 3,000-10,000 and a glass transition temperature of -20.degree. to +50.degree. C.;
• 5-60% by weight, based on the weight of the binder of an organic polyisocyanate crosslinking agent;
• and
• a sufficient amount of catalyst to cure the binder;
• and
• wherein the coating composition when cured has a water vapor permeability value of about 1400-3200.