Waterbased coating compositions of methylol(meth)acrylamide acrylic polymer, polyurethane and melamine crosslinking agent

A substrate coated with a clear coat layer adhered to a color coat layer being adhered to the substrate;

• wherein the color coat layer is formed from a waterbased coating composition comprising an acrylic polymer, a polyurethane and a crosslinking agent and comprises about 10-30% by weight of film forming binder dispersed in an aqueous carrier and having a pH of about 7-10;
• wherein the binder consists essentially of about
• a. 20-85% by weight, based on the weight of the binder, of an methylol (meth)acrylamide acrylic polymer consisting essentially of polymerized monomers of alkyl methacrylate, alkyl acrylate or mixtures thereof, 1-10% by weight, based on the weight of the acrylic polymer, of methylol methacrylamide, methylol acrylamide or mixtures thereof, 0.5-10% by weight, based on the weight of the acrylic polymer of an ethylenically unsaturated carboxylic acid, 0.5-10% by weight, based on the weight of the acrylic polymer, of an ethylenically unsaturated hydroxyl containing monomer and the acrylic polymer has a glass transition temperature of -40.degree. to +40.degree. C. and a weight average molecular weight of 500,000 to 3,000,000;
• and the carboxyl groups of the carboxylic acid are reacted with ammonia to provide a pH of about 7.0-10;
• b. 10-40% by weight, based on the weight of the binder, of a polyurethane selected from the group consisting of polyester urethane, polyether urethane or polyacrylourethane;
• and
• c. 5-40% by weight, based on the weight of the binder, of a water-soluble or a water-dispersible alkylated melamine formaldehyde crosslinking agent consisting essentially of a partially methylated melamine formaldehyde resin having a degree of polymerization of about 1-3 and
• contains pigments in a pigment to binder weight ratio of about 1:100-200:100.