# US 8,770,737 B2 · Ink jet inks containing nanodiamond black colorants > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,770,737 B2 - Document ID: US8770737B2 - Status: Granted - Kind: B2 - Application number: 13/680,226 - Filed: 2012-11-19 - Published: 2013-04-04 - Granted: 2014-07-08 - Earliest claimed: 2008-11-17 - Assignees: Xerox Corporation - Applicants: Xerox Corporation - Inventors: Jin Wu - Web page: https://patentgrep.com/patent/US8770737B2 ## CPC - B41J 2/2107: {characterised by the ink properties (supplying ink in a solid state B41J2/17593)} - B41J 2/01: Ink jet - B41J 2/045: by pressure, e.g. electromechanical transducers - B41J 2/17593: {Supplying ink in a solid state} - B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites - C08J 5/005: {Reinforced macromolecular compounds with nanosized materials, e.g. nanoparticles, nanofibres, nanotubes, nanowires, nanorods or nanolayered materials} - C09D 11/101: Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing - C09D 11/32: characterised by colouring agents - C09D 11/322: Pigment inks - C09D 11/34: Hot-melt inks - B41J 2/14201: {Structure of print heads with piezoelectric elements} - Y10S 977/773: Nanoparticle, i.e. structure having three dimensions of 100 nm or less - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - 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) - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract A liquid ink including (a) a carrier, (b) a colorant including nanodiamond black, and (c) a polymeric additive selected from the group including Gum Arabic, polyacrylate salts, polymethacrylate salts, polyvinyl alcohols, hydroxyl propylcellulose, hydroxyethylcellulose, polyvinylpyrrolidinone, polyvinyl ether, starch, polysaccharides, polyethylene imines derivatized with polyethylene oxide, polyethylene imines derivatized with polypropylene oxide, and mixtures thereof. ## Claims ### Claim 1 An aqueous ink comprising (a) an aqueous liquid ink carrier (b) a colorant comprising nanodiamond black; and (c) a polymeric additive selected from the group consisting of Gum Arabic, polyacrylate salts, polymethacrylate salts, polyvinyl alcohols, hydroxyl propylcellulose, hydroxyethylcellulose, polyvinylpyrrolidinone, polyvinyl ether, starch, polysaccharides, polyethylene imines derivatized with polyethylene oxide, polyethylene imines derivatized with polypropylene oxide, and mixtures thereof. ### Claim 2 (depends on 1) The ink of claim 1, wherein the nanodiamond black has an average grain size of from about 5 to about 500 nanometers. ### Claim 3 (depends on 1) The ink of claim 1, wherein the nanodiamond black comprises a diamond-like core substantially surrounded by a graphite shell, and wherein the core is present in an amount of from about 10 to about 70 weight percent with respect to the total weight of the core and shell. ### Claim 4 (depends on 1) The ink of claim 1, wherein the nanodiamond black comprises a diamond-like core substantially surrounded by a graphite shell, and wherein the core is present in an amount of about 50 weight percent and wherein the shell is present in an amount of about 50 weight percent, with respect to the total weight of the core and shell. ### Claim 5 (depends on 1) The ink of claim 1, wherein the nanodiamond black has a diamond-like core substantially surrounded by a graphite shell, and wherein the graphite shell is surface modified with at least one functional group. ### Claim 6 (depends on 1) The ink of claim 1, wherein the nanodiamond black has a diamond-like core substantially surrounded by a graphite surface, and wherein the surface is modified with at least one functional group, and wherein the at least one functional group is selected from the group consisting of carboxyl, carbonyl, quinine, ether, alkyl, nitrile, hydroxyl, lactone, amine, quaternized amine, and combinations thereof. ### Claim 7 (depends on 1) The ink of claim 1, wherein the nanodiamond black is present in an amount of from about 0.05% to about 30% by weight of the ink wherein a total weight of the ink is about 100%. ### Claim 8 (depends on 1) The ink of claim 1, wherein the aqueous ink carrier is selected from a member of the group consisting of water, glycols, mixtures of glycols, a mixture of water and a miscible organic component, amides, ethers, carboxylic acids, esters, alcohols, organosulfides, organosulfoxides, sulfones, dimethylsulfoxide, sulfolane, alcohol derivatives, carbitol, butyl carbitol, cellosolve, ether derivatives, amino alcohols, ketones, and mixtures thereof. ### Claim 9 (depends on 1) The ink of claim 1, further comprising a dispersant. ### Claim 10 (depends on 1) The ink of claim 1, further comprising a carbon black. ### Claim 11 (depends on 1) The ink of claim 1, further comprising an additive selected from the group consisting of biocides, penetration control additives, pH controlling agents, penetrants, surfactants, and mixtures thereof. ### Claim 12 A process which comprises (a) incorporating into an ink jet printing apparatus an aqueous ink comprising an aqueous liquid vehicle, a colorant comprising nanodiamond black; and a polymeric additive selected from the group consisting of Gum Arabic, polyacrylate salts, polymethacrylate salts, polyvinyl alcohols, hydroxyl propylcellulose, hydroxyethylcellulose, polyvinylpyrrolidinone, polyvinyl ether, starch, polysaccharides, polyethylene imines derivatized with polyethylene oxide, polyethylene imines derivatized with polypropylene oxide, and mixtures thereof; and (b) causing droplets of the ink to be ejected in an imagewise pattern onto a substrate. ### Claim 13 (depends on 12) The process of claim 12, wherein the printing apparatus employs a piezoelectric printing process wherein droplets of the ink are caused to be ejected in an imagewise pattern by oscillations of piezoelectric vibrating elements. ### Claim 14 (depends on 12) The process according to claim 12, wherein the substrate is a final recording sheet and droplets of the ink are ejected in an imagewise pattern directly onto the final recording sheet. ### Claim 15 (depends on 12) The process of claim 12, wherein the nanodiamond black has an average grain size of from about 5 to about 500 nanometers. ### Claim 16 (depends on 12) The process of claim 12, wherein the nanodiamond black comprises a diamond-like core substantially surrounded by a graphite shell, and wherein the core is present in an amount of from about 10 to about 70 weight percent with respect to the total weight of the core and shell. ### Claim 17 (depends on 12) The process of claim 12, wherein the nanodiamond black has a diamond-like core substantially surrounded by a graphite shell, and wherein the graphite shell is surface modified with at least one functional group. ### Claim 18 (depends on 12) The process of claim 12, wherein the aqueous ink carrier is selected from a member of the group consisting of water, glycols, mixtures of glycols, a mixture of water and a miscible organic component, amides, ethers, carboxylic acids, esters, alcohols, organosulfides, organosulfoxides, sulfones, dimethylsulfoxide, sulfolane, alcohol derivatives, carbitol, butyl carbitol, cellosolve, ether derivatives, amino alcohols, ketones, and mixtures thereof.