# US 2008/0306241 A1 · Method of stabilizing metal pigments against gassing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0306241 A1 - Document ID: US20080306241A1 - Status: Published application - Kind: A1 - Application number: 12/190,279 - Filed: 2008-08-12 - Published: 2008-12-11 - Earliest claimed: 2004-05-06 - Assignees: PPG Industries Ohio, Inc. - Inventors: Cathy A. Taylor; Daniel Rardon; Paul Lamers; Kaliappa G. Ragunathan; Shanti Swarup; Michael Hart - Web page: https://patentgrep.com/patent/US20080306241A1 ## CPC - C08G 59/4071: {phosphorus containing compounds} - C08G 59/4014: {Nitrogen containing compounds} - C08G 59/423: {containing an atom other than oxygen belonging to a functional groups to C08G59/42, carbon and hydrogen} - C09D 5/103: {containing Al} - C09D 163/00: Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins - Y10T 428/2998: including synthetic resin or polymer - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - 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) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The present invention is directed to a passivating material suitable for passivating a metal surface. The passivating material comprises a polymer which comprises (a) at least one nitro group, and/or pyridine group, and/or phenolic hydroxyl group; and (b) at least one group selected from a phosphorous-containing group and/or a carboxylic acid group, wherein the at least one phosphorous-containing group is selected from a phosphate, a phosphite, or a non-nitrogen substituted phosphonate. ## Claims ### Claim 1 A passivating material suitable for passivating a metal surface, the passivating material comprising: a polymer comprising: (a) at least one nitro group, and/or pyridine group, and/or phenolic hydroxyl group; and (b) at least one group selected from a phosphorous-containing group and/or a carboxylic acid group, wherein the at least one phosphorous-containing group is selected from a phosphate, a phosphite, or a non-nitrogen substituted phosphonate. ### Claim 2 (depends on 1) The passivating material of claim 1, wherein the polymer is selected from or is derived from an acrylic polymer, a polyester polymer, a polyurethane polymer, an epoxy polymer, a polyolefin polymer, a polyether polymer, copolymers thereof, or mixtures thereof. ### Claim 3 (depends on 1) The passivating material of claim 1, wherein the polymer comprises or is derived from an epoxy polymer. ### Claim 4 (depends on 1) The passivating material of claim 1, wherein the polymer is derived from a reaction product of reactants comprising a glycidyl ether of an aromatic alcohol. ### Claim 5 (depends on 1) The passivating material of claim 1, wherein the polymer is derived from a reaction product of reactants comprising a polyglycidyl ether of a polyhydric alcohol. ### Claim 6 (depends on 1) The passivating material of claim 1, wherein the polymer comprises or is derived from an acrylic polymer with glycidyl functionality. ### Claim 7 (depends on 1) The passivating material of claim 1, wherein the phosphorous-containing group is selected from at least one of a phosphate group and/or a non-nitrogen substituted phosphonate group. ### Claim 8 (depends on 1) The passivating material of claim 1, wherein the phosphorous-containing group is derived from at least one of phosphoric acid, and/or an alkyl, an aryl, and/or an alkyl aryl phosphonic acid, or mixtures thereof. ### Claim 9 (depends on 8) The passivating material of claim 8, wherein the phosphorous-containing group includes at least one of acid and/or ester functionality. ### Claim 10 (depends on 9) The passivating material of claim 9, wherein the acid functionalities are partially or fully neutralized. ### Claim 11 (depends on 1) The passivating material of claim 1, wherein the nitro group is derived from at least one of an alkyl, an aryl, and/or an alkyl aryl nitro group-containing compound. ### Claim 12 (depends on 1) The passivating material of claim 1, wherein the nitro group is derived from an aromatic nitro group-containing compound selected from 2-nitrobenzoic acid, 4-nitrobenzoic acid, 2-4-dinitrobenzoic acid, and mixtures thereof. ### Claim 13 (depends on 1) The passivating material of claim 1, wherein the nitro group is derived from 4-nitrobenzoic acid. ### Claim 14 (depends on 1) The passivating material of claim 1, wherein the polymer comprises the reaction product of reactants comprising: an aromatic epoxy group-containing compound; an aromatic nitro compound; and a phosphorous-containing compound. ### Claim 15 (depends on 1) The passivating material of claim 1, wherein the polymer comprises the reaction product of: a diglycidyl ether of a polyhydric aromatic alcohol; a nitro compound selected from the group consisting of 2-nitrobenzoic acid, 4-nitrobenzoic acid, 2-4-dinitrobenzoic acid, and mixtures thereof; and a phosphorous-containing compound selected from the group of phosphoric acid, an alkyl, an aryl, and/or an alkyl aryl phosphonic acid, and mixtures thereof. ### Claim 16 (depends on 14) The passivating material of claim 14, wherein the polymer has an equivalent ratio of epoxy:nitro group:phosphoric acid of 3.8/0.3/4.8 to 3.8/3/0.8. ### Claim 17 (depends on 14) The passivating material of claim 14, wherein the polymer has an equivalent ratio of epoxy:nitro group:phosphoric acid of 3.8/0.8/4.2 to 3.8/1/3.2. ### Claim at position 18 18-34. (canceled) ### Claim 35 A passivating material suitable for passivating a metal surface, the passivating material comprising: a polymer comprising: (a) at least one nitro group, and/or pyridine group, and/or phenolic hydroxyl group; and (b) at least one group selected from a phosphorous-containing group wherein the at least one phosphorous-containing group is selected from a phosphate, a phosphite, or a non-nitrogen substituted phosphonate. ### Claim 36 A passivating material suitable for passivating a metal surface, the passivating material comprising: a polymer comprising: (a) at least one nitro group; and (b) at least one group selected from a phosphorous-containing group wherein the at least one phosphorous-containing group is selected from a phosphate, a phosphite, or a non-nitrogen substituted phosphonate.