# US 5,705,227 A · Solvent resistant refinish paint composition and method of applying same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,705,227 A - Document ID: US5705227A - Status: Granted - Kind: A - Application number: 08/482,689 - Filed: 1995-06-07 - Granted: 1998-01-06 - Earliest claimed: 1988-03-15 - Assignees: BASF SE - Inventors: Douglas H. Larrow; Lawrence E. Thieben - Web page: https://patentgrep.com/patent/US5705227A ## CPC - C09D 5/002: {Priming paints (C09D5/08 takes precedence)} - B05D 7/584: {at least some layers being let to dry, at least partially, before applying the next layer (B05D7/587 takes precedence)} - C09D 163/10: Epoxy resins modified by unsaturated compounds - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02) ## Abstract Air-dry refinish primer compositions containing microparticles have been found to exhibit superior air-dry properties as well as being resistant to solvent attack when a primer-surfacer or topcoat is applied after a short (30 minute or less) dry time of the primer composition. ## Claims ### Claim 1 A method for refinishing a substrate surface comprising: preparing a refinish primer composition comprising an organic solvent based dispersion having a solids content in the range from about 45 to 70% by weight, wherein said solids comprise: from about 10 to about 50% by weight of crosslinked acrylic polymer microparticles having a diameter of 0.1 to 10 microns which are insoluble in the organic solvent and are stabilized in the solvent system by steric barriers; from about 30 to about 60% by weight of an oxidatively-curable resin; and from about 15 to about 40% by weight of one or more additional ingredients selected from the group consisting of corrosion inhibitors, inert fillers, pigments, surface builders and mixtures thereof; applying said refinish primer composition to a substrate surface to form a protective layer; applying on said protective layer, when said protective layer is tacky, a primer surfacer composition comprising an organic solvent, an oxidatively-curable or plastic resin and an inert filler to form a refinish primer system having an overlaid primer surfacer layer on said protective layer; smoothing the overlaid primer surfacer layer without using a heat treatment as soon as said primer surfacer is dry to touch, such that the smoothing step is carried out while said refinish primer system is uncured; applying a topcoat on the smoothed overlaid primer surfacer layer; and allowing said refinish primer system to oxidatively cure. ### Claim 2 (depends on 1) The method for refinishing a substrate surface according to claim 1 wherein said one or more additional ingredients comprises a corrosion inhibitor. ### Claim 3 (depends on 1) The method for refinishing a substrate surface according to claim 1 wherein said one or more additional ingredients comprises an inert filler, a colored pigment or a mixture thereof. ### Claim 4 (depends on 1) The method for refinishing a substrate surface according to claim 1 wherein the microparticles are associated with dispersion stabilizing polymers which form the surrounding steric barriers, and contain at least two segments, one being soluble in the organic solvent and the other being substantially insoluble therein. ### Claim 5 (depends on 4) The method for refinishing a substrate surface according to claim 4 wherein the dispersion stabilizing polymers are chemically bound to the microparticles. ### Claim 6 (depends on 1) The method for refinishing a substrate surface according to claim 1 wherein the oxidatively-curable resin comprises an alkyd resin, an oil-modified acrylic resin, an epoxy-unsaturated fatty acid ester resin, or an addition or condensation resin with pendant olefinic groups. ### Claim 7 (depends on 6) The method for refinishing a substrate surface according to claim 6 wherein the addition or condensation resin is a polyester, polyurethane, polyamide, polylactone, polycarbonate or polyolefin. ### Claim 8 (depends on 2) The method for refinishing a substrate surface according to claim 2 wherein the corrosion inhibitor is a zinc salt. ### Claim 9 (depends on 8) The method for refinishing a substrate surface according to claim 8 wherein the zinc salt is zinc phosphate. ### Claim 10 (depends on 1) The method for refinishing a substrate surface according to claim 1 wherein the organic solvent system has nonpolar solvating power. ### Claim 11 (depends on 10) The methods for refinishing a substrate surface according to claim 10 wherein the solvent system comprises an aromatic hydrocarbon, an aliphatic ketone, an aliphatic ester or a mixture thereof. ### Claim 12 (depends on 1) The method for refinishing a substrate surface according to claim 1 wherein the microparticles are polymers of methyl acrylate or methacrylate, acrylic or methacrylic acid and glycidyl acrylate or methacrylate with surrounding steric barriers of the adduct of self-condensed 12-hydroxystearic acid and glycidyl acrylate or methacrylate, which adduct is copolymerized with methyl acrylate or methacrylate and acrylic or methacrylic acid. ### Claim 13 (depends on 1) The method for refinishing a substrate surface according to claim 1 wherein said refinish primer composition comprises silica, bentonite or kaoline clay, zeolites, talcs, inorganic carbonate or silicate or mixtures thereof. ### Claim 14 (depends on 1) The method for refinishing a substrate surface according to claim 1 wherein the solids content of said organic solvent based dispersion is 50 to 60 percent by weight. ### Claim 15 (depends on 1) The method for refinishing a substrate surface according to claim 1 wherein said solids comprise from about 20 to about 40% by weight of the crosslinked acrylic polymer microparticles. ### Claim 16 (depends on 1) The method for refinishing a substrate surface according to claim 1 wherein said solids comprise from about 40 to about 50% by weight of the oxidatively-curable resin. ### Claim 17 (depends on 1) The method for refinishing a substrate surface according to claim 1 wherein said solids comprise from about 20 to about 35% by weight of one or more ingredients selected from the group consisting of corrosion inhibitors, inert fillers, pigments, surface builders and mixtures thereof. ### Claim 18 (depends on 1) The method for refinishing a substrate surface according to claim 1 wherein said solids comprise: from about 20 to about 40% by weight of the crosslinked acrylic polymer microparticles; from about 40 to about 50% by weight of the oxidatively-curable resin; and from about 20 to about 35% by weight of one or more ingredients selected from the group consisting of corrosion inhibits, inert fillers, pigments, surface builders and mixtures thereof. ### Claim 19 (depends on 1) The method for refinishing a substrate surface according to claim 1 wherein said smoothing is by sanding, buffing or carving. ### Claim 20 (depends on 1) The method for refinishing a substrate surface according to claim 1 wherein said refinish primer system is allowed to oxidatively cure without applying heat.