# US 5,344,858 A · Coating from phosphated epoxy and COOH-vinyl addition resins > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,344,858 A - Document ID: US5344858A - Status: Granted - Kind: A - Application number: 08/068,264 - Filed: 1993-05-28 - Granted: 1994-09-06 - Earliest claimed: 1984-09-10 - Assignees: PPG Industries, Inc. - Inventors: Terence J. Hart; Ellor J. Van Buskirk; Thomas R. Hockswender - Web page: https://patentgrep.com/patent/US5344858A ## CPC - C09D 163/00: Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins - C08G 59/1422: {containing phosphorus} - C09D 5/4473: {Mixture of polymers} - C09D 133/064: {containing anhydride, COOH or COOM groups, with M being metal or onium-cation} - C08L 63/00: Compositions of epoxy resins; Compositions of derivatives of epoxy resins - 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) - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract A composition useful as an aqueous anionic electrodepositable coating comprises a film-former of from about 67-95% by weight of a phosphated polyepoxide resin, from about 5-33% by weight of a carboxyl group-containing vinyl addition resin, and up to about 40% by weight of the film-former of a crosslinking agent. ## Claims ### Claim 1 A coating composition comprising as a film-former: (A) up to about 40 percent by weight of crosslinking agent based other than the vinyl addition resin on film-former resin content; (B) the remainder of the film former comprising a blend of: (i) from about 67 to 95 percent by weight based on resin solids of the blend of an ungelled phosphated epoxy which is derived from reacting a 1,2-epoxy group of a polyepoxide resin and a phosphoric acid in a ratio of 0.1 to 1 mole of a phosphoric acid per equivalent of the epoxy group; and (ii) from about 5 to 33 percent by weight based on resin solids of the blend of a vinyl addition resin which is derived from copolymerizing ethylenically unsaturated monomers, at least one of which is a carboxyl group-containing monomer, which has an acid value of from 20 to 350. ### Claim 2 (depends on 1) A coating composition of claim 1, wherein the polyepoxide resin is a polyglycidyl ether of a polyol which has an epoxy equivalent weight of 170 to 5000. ### Claim 3 (depends on 2) A coating composition of claim 2, wherein the epoxy equivalent weight is from about 850 to 3000. ### Claim 4 (depends on 1) A coating composition of claim 1, wherein at least one of the ethylenically unsaturated monomers contains an N-(alkoxymethyl)amide group. ### Claim 5 (depends on 4) A coating composition of claim 4 wherein the N-(alkoxymethyl)amide group-containing monomer is N-ethoxymethylacrylamide or N-butoxymethylacrylamide. ### Claim 6 (depends on 1) A coating composition of claim 1 wherein the crosslinking agent is an aminoplast, phenoplast or blocked polyisocynate. ### Claim 7 An anionic electrodepositable composition comprising as a film-former: (A) up to about 40 percent by weight of crosslinking agent based on film-former resin content; (B) the remainder of the film former comprising an aqueous dispersion of a base-neutralized blend of: (i) from about 67 to 95 percent by weight based on resin solids of the blend of an ungelled phosphated epoxy consisting essentially of a reaction product of a polyepoxide resin and a phosphoric acid in a ratio of 0.1 to 1 mole of phosphoric acid per equivalent of the polyepoxide epoxy group; and (ii) from about 5 to 33 percent by weight based on resin solids of the blend of a vinyl addition resin which is derived from copolymerizing ethylenically unsaturated monomers, at least one of which is carboxy group-containing monomer, which has an acid value of from 20 to 350. ### Claim 8 (depends on 7) An electrodepositable composition of claim 7, wherein the polyepoxide resin has an epoxy equivalent weight of 170 to 5000. ### Claim 9 (depends on 8) An electrodepositable composition of claim 8, wherein the epoxy equivalent weight is 850 to 3000. ### Claim 10 (depends on 7) An electrodepositable composition of claim 7, wherein the base is diisopropanolamine or dimethylethanolamine. ### Claim 11 (depends on 1) A coating composition of claim 1 wherein the phosphated epoxy is derived from reacting the polyepoxide resin and the phosphoric acid in a ratio of 0.1 to 0.5 mole of phosphoric acid per equivalent of epoxy groups. ### Claim 12 (depends on 10) A coating composition of claim 10 wherein the phosphated epoxy is derived from reacting the polyepoxide resin and the phosphoric acid in a ratio of 0.1 to 0.5 mole of phosphoric acid per equivalent of epoxy groups. ### Claim 13 (depends on 1) A coating composition of claim 1 wherein the vinyl addition resin has an acid value of about 20 to about 350. ### Claim 14 (depends on 1) A coating composition of claim 1 wherein the vinyl addition resin has an acid value of about 45 to about 150. ### Claim 15 (depends on 7) A coating composition of claim 7 wherein the vinyl addition resin has an acid value of about 20 to about 350. ### Claim 16 (depends on 7) A coating composition of claim 7 wherein the vinyl addition resin has an acid value of about 45 to about 150.