Patent ID: 7740911

Claim:
A method for forming a multi-layer coating comprising sequentially applying a layer of a primer coating composition, a layer of a base coating composition and a layer of a clear coating composition on a substrate; and simultaneously curing the applied three layers by baking, wherein the primer coating composition comprises: a film forming binder and an organic liquid carrier, and optionally pigment(s) in a pigment to binder weight ratio of about 1:100-150:100; and the binder contains about: (a) 40 to 95% by weight, based on the weight of the binder, of a caprolactone modified branched acrylic polymer having a hydroxyl and/or carboxyl monomer content, all or part of which has been reacted with a cyclic lactone, of about 1 to 65% by weight and a weight average molecular weight of about 10,000 to 150,000; and (b) 5 to 60% by weight, based on the weight of the binder of a crosslinking agent selected from the group consisting of an aminoplast resin, a blocked polyisocyanate resin, or a mixture thereof.