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AssigneePPG Industries Ohio, Inc.
InventorsKaren A. Barkac, Dennis Leroy Faler, Mary E. Grolemund, Debra Lynn Singer
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A multi-component composite coating composition is provided which includes a pigmented base coat and a transparent topcoat composition applied over the base coat. The transparent topcoat is deposited from a substantially solvent free film-forming composition which includes a thermosettable dispersion of polymeric microparticles having functionality adapted to react with a crosslinking agent and a hydrophilic crosslinking agent reactive with the functionality of the microparticles. The microparticles are prepared from one or more reaction products of ethylenically unsaturated monomers, one or more hydrophobic polymers and one or more hydrophobic crosslinking agents. Pigmented film-forming compositions as well as curable compositions containing the above-described dispersions also are provided. A method of forming the dispersion of polymeric microparticles is provided. The substantially solvent-free film-forming compositions of the invention are storage stable at room temperature and provide coatings with excellent application properties such as sag resistance and tack-free overspray, and excellent performance properties such as chip resistance and adhesion. The film-forming compositions are suitable for wet-on-wet application over a base coat with little or no mudcracking.
A multi-component composite coating composition comprising a base coat deposited from a pigmented film-forming composition and a transparent topcoat composition applied over the base coat in which the transparent topcoat is deposited from a film-forming composition which is substantially free of organic solvent and capable of forming a generally continuous film at ambient temperature, said topcoat film-forming composition comprising:
A pigmented film-forming composition which is substantially free of organic solvent and capable of forming a generally continuous film at ambient temperature, said pigmented film-forming composition comprising at least one pigment and at least one thermosettable dispersion in a medium substantially free of organic solvent comprising polymeric microparticles which contain (1) at least one polymer formed from polymerizable ethylenically unsaturated monomers;
A curable composition which is substantially free of organic solvent, said composition comprising:
An aqueous dispersion in a medium substantially free of organic solvent comprising polymeric microparticles which contain (1) at least one polymer formed from polymerizable ethylenically unsaturated monomers;
A method for preparing a thermosettable aqueous dispersion of polymeric microparticles in a medium which is substantially free of organic solvent, said method comprising the following steps:
Dependencies are inferred from the claim text.