# US 8,465,142 B2 · Aqueous inkjet printing fluid compositions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,465,142 B2 - Document ID: US8465142B2 - Status: Granted - Kind: B2 - Application number: 12/915,482 - Filed: 2010-10-29 - Published: 2012-05-03 - Granted: 2013-06-18 - Earliest claimed: 2010-10-29 - Assignees: Eastman Kodak Company - Applicants: Mark E. Irving; Steven Evans; Yongcai Wang; Margaret D. Steele - Inventors: Mark E. Irving; Steven Evans; Yongcai Wang; Margaret D. Steele - Web page: https://patentgrep.com/patent/US8465142B2 ## CPC - B41J 2/16552: {using cleaning fluids} - C09D 11/322: Pigment inks - C09D 11/38: characterised by non-macromolecular additives other than solvents, pigments or dyes - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - 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) ## Abstract An aqueous inkjet printing fluid composition for use in an inkjet printer including a silicon-based material which contacts the aqueous printing fluid composition, having in a concentration sufficient to inhibit corrosion of the silicon-based material when contacted by the aqueous printing fluid composition a soluble metal ligand complex having a divalent or a trivalent metal M and one or more organic ligands of Formula (I): wherein X may be chosen from the group consisting of H and carboalkoxy, alkyl, alkoxy, aryl, hetaryl, carboxy, sulfo and phospho substituents; and Y may be chosen from the group consisting of H and carboalkoxy, alkyl, alkoxy, aryl, hetaryl, carboxy, amino, hydroxyl, sulfo and phospho substituents. The useful lifetime of microelectromechanical fluidic devices based on silicon fabrication is extended. ## Claims ### Claim 1 An aqueous inkjet printing fluid composition for use in an inkjet printer comprising a silicon-based material which contacts the aqueous printing fluid composition, comprising in a concentration sufficient to inhibit corrosion of the silicon-based material when contacted by the aqueous printing fluid composition a soluble metal ligand complex comprising a divalent or a trivalent metal M and one or more organic ligands of Formula (I): wherein X may be chosen from the group consisting of H and carboalkoxy, alkyl, alkoxy, aryl, hetaryl, carboxy, sulfo and phospho substituents; and Y may be chosen from the group consisting of H and carboalkoxy, alkyl, alkoxy, aryl, hetaryl, carboxy, amino, hydroxyl, sulfo and phospho substituents. ### Claim 2 (depends on 1) The aqueous inkjet printing fluid composition of claim 1, further comprising at least one of an anionically charged or dispersed colorant and an anionic charged polymer. ### Claim 3 (depends on 2) The aqueous inkjet printing fluid composition of claim 2, comprising an anionically dispersed pigment. ### Claim 4 (depends on 2) The aqueous inkjet printing fluid composition of claim 2, comprising a self-dispersed negatively surface charged pigment. ### Claim 5 (depends on 2) The aqueous inkjet printing fluid composition of claim 2, comprising a water soluble or dispersible anionic charged polymer. ### Claim 6 (depends on 2) The aqueous inkjet printing fluid composition of claim 2, wherein the composition comprises less than 2 weight percent of any colorants. ### Claim 7 (depends on 1) The aqueous inkjet printing fluid composition of claim 1, wherein X is a carboxymethyl group. ### Claim 8 (depends on 1) The aqueous inkjet printing fluid composition of claim 1, wherein the ligand of Formula I is citric acid. ### Claim 9 (depends on 1) The aqueous inkjet printing fluid composition of claim 1, wherein the soluble metal ligand complex is present at a concentration of less than or equal to about 1.0 weight percent. ### Claim 10 (depends on 1) The aqueous inkjet printing fluid composition of claim 1, wherein the soluble metal ligand complex is present at a concentration of from 0.0001 to less than 1.0 weight percent. ### Claim 11 (depends on 1) The aqueous inkjet printing fluid composition of claim 1, wherein M represents aluminum, gallium, indium, chromium, iron, or zinc. ### Claim 12 (depends on 1) The aqueous inkjet printing fluid composition of claim 1, wherein M represents Al(III). ### Claim 13 (depends on 12) The aqueous inkjet printing fluid composition of claim 12, wherein X is a carboxymethyl group. ### Claim 14 (depends on 12) The aqueous inkjet printing fluid composition of claim 12, wherein the ligand of Formula I is citric acid. ### Claim 15 (depends on 1) A process for printing an inkjet printing fluid composition with an inkjet printer comprising a silicon-based material which contacts the inkjet printing fluid composition, comprising loading the printer with an aqueous inkjet printing fluid composition according to claim 1 comprising a soluble metal ligand complex in a concentration sufficient to inhibit corrosion of the silicon-based material when contacted by the aqueous ink composition, and ejecting the aqueous inkjet printing fluid composition against a recording material. ### Claim 16 (depends on 15) The process according to claim 15, wherein the inkjet printer is a drop-on-demand thermal inkjet printer which employs a silicon-based drop generating printhead. ### Claim 17 (depends on 15) The process according to claim 15, wherein the inkjet printer is a continuous inkjet printer which employs a silicon-based drop generating printhead. ### Claim 18 (depends on 1) An inkjet system comprising a) a silicon-based printhead; and b) an aqueous inkjet printing fluid composition according to claim 1 comprising a soluble metal ligand complex in a concentration sufficient to inhibit corrosion of the silicon-based printhead when contacted by the aqueous inkjet printing fluid composition.