# US 8,569,397 B2 · Ink set for ink jet recording and ink jet recording method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,569,397 B2 - Document ID: US8569397B2 - Status: Granted - Kind: B2 - Application number: 12/627,541 - Filed: 2009-11-30 - Published: 2010-07-01 - Granted: 2013-10-29 - Earliest claimed: 2008-12-26 - Assignees: FUJIFILM Corporation - Applicants: Tomoyuki Ohzeki - Inventors: Tomoyuki Ohzeki - Web page: https://patentgrep.com/patent/US8569397B2 ## CPC - C09D 11/38: characterised by non-macromolecular additives other than solvents, pigments or dyes - C09D 11/322: Pigment inks - C09D 11/40: Ink-sets specially adapted for multi-colour inkjet printing - B41M 5/0017: {Application of ink-fixing material, e.g. mordant, precipitating agent, on the substrate prior to printing, e.g. by ink-jet printing, coating or spraying} - B41M 7/0018: {using ink-fixing material, e.g. mordant, precipitating agent, after printing, e.g. by ink-jet printing, coating or spraying} - C08K 5/0041: {Optical brightening agents, organic pigments} - C08K 5/12: of cyclic polycarboxylic acids - C08K 5/20: Carboxylic acid amides - 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) - B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) ## Abstract An ink set for ink jet recording containing an ink composition containing a pigment, polymer particles, a water-soluble organic solvent, a lubricant, and water and a reaction liquid that forms an aggregate by contacting with the ink composition and an ink jet recording method using the same are provided. ## Claims ### Claim 1 An ink set for ink jet recording, comprising: an ink composition containing a pigment, polymer particles, a water-soluble organic solvent, a lubricant, and water; and a reaction liquid that forms an aggregate by contacting with the ink composition, wherein the polymer particles are self-dispersing polymer particles, wherein the self-dispersing polymer particles contain a constituent unit derived from an aromatic group-containing (meth)acrylate monomer, and the content thereof in the self-dispersing polymer particles is 10% by mass to 95% by mass. ### Claim 2 (depends on 1) The ink set for ink jet recording according to claim 1, wherein the lubricant is at least one selected from a wax, a silicone compound, an ester compound, a fatty acid amide compound, a fluorine compound, a higher aliphatic acid, salts thereof, or an organic or inorganic matting agent. ### Claim 3 (depends on 1) The ink set for ink jet recording according to claim 1, wherein the lubricant is at least one selected from a wax of a straight chain higher fatty acid ester, a hydrocarbon wax, a silicone oil having a structure of —(—Si(CH3)2)n- in which n is an integer of 1 or more, 1-pentadecyl-2-hexadecyl-phthalic acid diester, or palmitic acid amide. ### Claim 4 (depends on 1) The ink set for ink jet recording according to claim 1, wherein the lubricant is a wax. ### Claim 5 (depends on 4) The ink set for ink jet recording according to claim 4, wherein the lubricant is a wax emulsion. ### Claim 6 (depends on 5) The ink set for ink jet recording according to claim 5, wherein an average particle size of the lubricant is 0.1 μm to 2 μm. ### Claim 7 (depends on 1) The ink set for ink jet recording according to claim 1, wherein the lubricant is contained in the ink composition in a proportion of 0.1% by mass to 5% by mass in terms of solid matter concentration. ### Claim 8 (depends on 1) The ink set for ink jet recording according to claim 1, wherein the pigment is dispersed by a water-insoluble polymer. ### Claim 9 (depends on 1) The ink set for ink jet recording according to claim 1, wherein the self-dispersing polymer particles contain a carboxy group. ### Claim 10 (depends on 1) The ink set for ink jet recording according to claim 1, wherein the self-dispersing polymer particles contain a water insoluble polymer having an acid value of 25 mgKOH/g to 100 mgKOH/g and a weight average molecular weight of 3,000 to 200,000. ### Claim 11 (depends on 1) The ink set for ink jet recording according to claim 1, wherein a glass transition temperature of a polymer of the polymer particles is from 20° C. to 200° C. ### Claim 12 (depends on 1) An ink jet recording method comprising forming an image on a recording medium using the ink set for ink jet recording according to claim 1. ### Claim 13 (depends on 12) The ink jet recording method according to claim 12, comprising, after the image formation process: drying the image; and bringing a surface of the image into contact with a heating member after drying to fix the image. ### Claim 14 (depends on 12) The ink jet recording method according to claim 12, wherein the image formation process comprises: applying the reaction liquid on the recording medium; and applying the ink composition on the reaction liquid applied on the recording medium for contact therebetween to form an aggregate. ### Claim 15 (depends on 1) The ink set for ink jet recording according to claim 1, wherein the lubricant is in the form of dispersed particles comprising 25% by mass to 99% by mass of a lubricant and 1% by mass to 75% by mass of a dispersant represented by the Formula (1): (R3)a-G-(D)d Formula (1) wherein R3 represents a substituted or unsubstituted alkyl group, alkenyl group, aralkyl group, or aryl group, which has 10 to 60 carbon atoms; G represents a linking group having a valency of 2 to 7; D represents (B)n-E, wherein B represents —CH2CH2O—, —CH2CH2CH2O—, —CH(CH3)CH2O—, or —CH2CH(OH)CH2O—; and n represents an integer of from 1 to 50, and E represents hydrogen, or a substituted or unsubstituted alkyl group, aryl group, alkyl carbonyl group, or aryl carbonyl group, which has 1 to 8 carbon atoms; each of a and d represents an integer of 1 to 6; and plural R3s, Ds, and Es may be mutually the same or different.