Coating processes – Applying superposed diverse coating or coating a coated base
Reexamination Certificate
2004-03-03
2009-08-25
Lipman, Bernard (Department: 1796)
Coating processes
Applying superposed diverse coating or coating a coated base
C427S407100, C524S839000, C524S840000, C525S124000, C525S330500
Reexamination Certificate
active
07579048
ABSTRACT:
A process for improving the intercoat adhesion in a multicoat paint system utilizing a primer coat, an aqueous basecoat, and a clearcoat, where the multicoat paint system has been produced by means of a wet-on-wet technique. The clearcoat is produced using a pseudoplastic powder clearcoat slurry prepared by a secondary dispersion process or a melt emulsification process. The aqueous basecoat material used to produce the aqueous basecoat comprises a dispersed graft copolymer whose particles are composed of a hydrophobic core of copolymerized olefinically unsaturated monomers and of a hydrophilic shell which comprises a polyurethane, where said copolymer is prepared by free-radical (co)polymerization of the monomers in the presence of at least one polyurethane containing specially selected olefinically unsaturated groups.
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Schwarte Stephan
Wegner Egon
BASF Coatings
Cantor & Colburn LLP
Lipman Bernard
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