# US 11,999,863 B2 · White ink composition and recording method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,999,863 B2 - Document ID: US11999863B2 - Status: Granted - Kind: B2 - Application number: 17/534,525 - Filed: 2021-11-24 - Published: 2022-06-02 - Granted: 2024-06-04 - Earliest claimed: 2020-11-27 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Kohei Ishida - Web page: https://patentgrep.com/patent/US11999863B2 ## CPC - C09D 11/107: from unsaturated acids or derivatives thereof - B41J 2/2107: {characterised by the ink properties (supplying ink in a solid state B41J2/17593)} - B41J 2/2114: {Ejecting specialized liquids, e.g. transparent or processing liquids (B41J2/211 takes precedence)} - B41J 2/2117: {Ejecting white liquids} - B41M 5/0023: {Digital printing methods characterised by the inks used (inks per se C09D11/00)} - C09D 11/322: Pigment inks - C09D 11/38: characterised by non-macromolecular additives other than solvents, pigments or dyes - 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) - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - 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) ## Abstract A white ink composition which is an aqueous ink jet ink, includes a white colorant and a fixing resin, and the fixing resin contains an acrylic-based resin having an acid value of 50.0 to 100.0 mgKOH/g and a glass transition temperature of 20.0° C. to 50.0° C. ## Claims ### Claim 1 A white ink composition which is an aqueous ink jet ink, comprising: a white colorant; and a fixing resin, wherein the fixing resin contains an acrylic-based resin having an acid value of 55.0 to 100.0 mgKOH/g and a glass transition temperature of 23.0° C. to 50.0° C. ### Claim 2 (depends on 1) The white ink composition according to claim 1, wherein the acrylic-based resin is in the form of particles, and a volume average particle diameter of the particles is 100.0 to 150.0 nm. ### Claim 3 (depends on 1) The white ink composition according to claim 1, wherein a content of the acrylic-based resin with respect to the total mass of the composition is 1.0 to 15.0 percent by mass. ### Claim 4 (depends on 1) The white ink composition according to claim 1, wherein the acrylic-based resin includes constituent units derived from a vinyl monomer, and a rate of the constituent units derived from a vinyl monomer to all constituent units of the acrylic-based resin is 35.0 percent by mass or less. ### Claim 5 (depends on 1) The white ink composition according to claim 1, wherein the acrylic-based resin includes constituent units derived from an aromatic (meth)acrylate or an alicyclic (meth)acrylate, and a rate of the constituent units derived from an aromatic (meth)acrylate or an alicyclic (meth)acrylate to all constituent units of the acrylic-based resin is 40.0 percent by mass or less. ### Claim 6 (depends on 1) The white ink composition according to claim 1, wherein the acrylic-based resin includes constituent units derived from a long chain aliphatic (meth)acrylate, and a rate of the constituent units derived from a long chain aliphatic (meth)acrylate to all constituent units of the acrylic-based resin is 30.0 percent by mass or more. ### Claim 7 (depends on 1) The white ink composition according to claim 1, wherein a content of the white colorant with respect to the total mass of the composition is 5.0 to 20.0 percent by mass. ### Claim 8 (depends on 1) The white ink composition according to claim 1, further comprising: a nitrogen-containing solvent or a glycol ether solvent having 8 carbon atoms or less. ### Claim 9 (depends on 1) The white ink composition according to claim 1, wherein the white ink composition is used to form a recorded matter having a recorded surface, and the recorded surface is processed by a laminate treatment. ### Claim 10 (depends on 1) The white ink composition according to claim 1, wherein the white ink composition is used for recording on a low-absorbing recording medium or a non-absorbing recording medium. ### Claim 11 (depends on 1) A recording method comprising: adhering the white ink composition according to claim 1 to a recording medium by an ink jet method.