Patent ID: 8227544
Filing Date: 2012-07-24
Classification: C08G,C08K,C08L,C09D

Abstract:
1. A process for forming a multi-layer coating comprising sequentially applying directly onto a layer of a cured electrocoat composition, a layer of a primer composition, a layer of a basecoat composition and a layer of a clearcoat composition; and simultaneously curing the applied layers by heating; wherein the basecoat composition comprises a crosslinkable component, a crosslinking component, an organic liquid carrier, and optionally pigment; wherein wherein the total weight percentage of the linear or branched C8 or higher alkyl acrylate monomer and polyester-extended acrylate monomer is at least 40 percent by weight based on the total weight of the acrylic polyol; wherein the applied layer of primer composition and the applied layer of basecoat composition resist intermixing; and wherein said curing is the first curing for each of the applied primer, basecoat, and clearcoat layers; and wherein the primer composition comprises a crosslinkable primer component and a crosslinking primer component wherein the crosslinkable primer component comprises about 40 to 95 percent by weight, based on the total weight of the crosslinkable primer component and the crosslinking primer component, of a film-forming acrylic polymer component comprising two acrylic polymers, the first being a polyester-extended branched acrylic polymer and the second being a polyester-extended linear acrylic polymer, the polymers being provided in a relative weight ratio of from about 5:95 to 95:5; and wherein the crosslinking primer component comprises about 5 to 60 percent by weight, based on the total weight of the crosslinkable primer component and the crosslinking primer component, of an aminoplast resin, a blocked polyisocyanate resin, or a combination thereof.