Coating system for a porous substrate using an asphalt-containing thermosetting basecoat composition and a thermoplastic top coat composition
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United States of America Patent
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Feb 1, 2005
Grant Date -
Jun 19, 2003
app pub date -
Jan 8, 2003
filing date -
Nov 29, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A coating system comprises a basecoat of an thermosetting asphalt extended, chemically cross linked-urethane/epoxy hybrid basecoat resting on a substrate, preferably a porous substrate such as concrete or wood that off-gas when coated with a thermoplastic material; and a thermoplastic powder coating topcoat overlying at least the base coat. The thermosetting basecoat composition consisting essentially of, in weight percent based on final formulation, and between 10 and 90% of a petroleum asphalt; between 10 and 90%, of a hydroxy-terminated homopolymer; and between 0.1 and 30% of a functional epoxy reactive diluent for reducing the viscosity of the composition; and further up to 5% of a surfactant for improving surface imperfections, up to 5% of an anti-oxidant; and up to 25% of a thickening agent.
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Cited Art Landscape
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