Stock material or miscellaneous articles – Composite – Of addition polymer from unsaturated monomers
Reexamination Certificate
2010-12-03
2011-11-22
Kiliman, Leszek (Department: 1788)
Stock material or miscellaneous articles
Composite
Of addition polymer from unsaturated monomers
C428S474700, C525S408000
Reexamination Certificate
active
08062761
ABSTRACT:
This invention relates to a method for forming a multi-layer coating on a vehicle body, comprised of applying primer coating, base coating, and clear coat layers in a wet-on-wet-on-wet manner, and simultaneously curing the applied three layers together in a single baking step. The primer layer comprises a film-forming binder comprising two acrylic polymers, the first being a caprolactone-modified branched acrylic polymer and the second being a caprolactone-modified linear acrylic polymer; and a crosslinking agent selected from aminoplast resin, blocked polyisocyanates, or mixtures thereof, wherein the composition is, essentially free of crosslinked nonaqueous dispersion resin particles or crosslinked microgel resin particles or both. The resulting multi-layered coating has excellent aesthetic appearance, strike-in resistance, chipping resistance, sag resistance, and film build even when formed in a three wet layered application method.
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Hazan Isidor
Johnson Jeffery W.
Matheson Robert R.
Trindade Delson J.
Uhlianuk Peter W.
E. I. du Pont de Nemours and Company
Kiliman Leszek
Xu Gann G.
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