US 6,849,338 B2 · Coating system for a porous substrate using an asphalt-containing thermosetting basecoat composition and a thermoplastic top coat composition

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.

Claims14

Dependent claims

A coating system comprising:

a) basecoat of an thermosetting asphalt extended, chemically cross linked-urethane/epoxy hybrid basecoat resting on a substrate that off-gases when coated with a thermoplastic material;
and
b) a thermoplastic powder coating topcoat overlying at least the base coat;
c) wherein the thermosetting asphalt extended, chemically cross linked-urethane/epoxy hybrid basecoat comprises, in weight percent based on final formulation:
between 10 and 90% of a petroleum asphalt;
between 10 and 90% of a hydroxy-terminated homopolymer;
between 0.1 and 30% of an epoxy-functional reactive diluent for reducing the viscosity of the composition;
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 for improved thermal resistance, resiliency, adhesion to the substrate and topcoat, and chemical resistance.

8 more elements

A coating system comprising:

a) basecoat of an thermosetting asphalt extended, chemically cross linked-urethane/epoxy hybrid basecoat resting on a substrate that off-gases when coated with a thermoplastic material;
and
b) a thermoplastic powder coating topcoat overlying at least the base coat;
wherein the thermoplastic powder coating topcoat has a topcoat thermoplastic composition comprising, in weight percent, based on final formulation:
between 10 and 90% of a modified ethylene terpolymer;
between 5 and 95% of a polyethylene/methacrylic acid copolymer;
between 5 and 95% of a polyethylene/methacrylic acid copolymer ionomer;
up to 50% of a coloring pigment;
up to 5% of an anti-oxidant;
up to 5% of an ultraviolet stabilizer;
up to 5% of a surfactant for improving surface imperfections;
and
up to 25% of a thickening agent.

10 more elements

Dependencies are inferred from the claim text.

Coating system for a porous substrate using an asphalt-containing thermosetting basecoat composition and a thermoplastic top coat composition

Life of this patent

Coating system for a porous substrate using an asphalt-containing thermosetting basecoat composition and a thermoplastic top coat composition

Life of this patent

Abstract

Claims14