# US 9,039,824 B2 · Thermal ink jet ink composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,039,824 B2 - Document ID: US9039824B2 - Status: Granted - Kind: B2 - Application number: 13/242,768 - Filed: 2011-09-23 - Published: 2012-01-19 - Granted: 2015-05-26 - Earliest claimed: 2008-03-31 - Assignees: Videojet Technologies Inc. - Applicants: Casey Robertson; Anthony Selmeczy; John P. Folkers - Inventors: Casey Robertson; Anthony Selmeczy; John P. Folkers - Web page: https://patentgrep.com/patent/US9039824B2 ## CPC - C09D 11/38: characterised by non-macromolecular additives other than solvents, pigments or dyes - C09D 11/30: Inkjet printing inks - 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 inkjet ink includes an organic solvent, a resin, a surfactant, and a colorant. The ink has a decap time of at least about 1 minute. ## Claims ### Claim 1 An inkjet ink comprising: an organic solvent, a resin, a surfactant, a humectant, and a colorant, wherein the organic solvent is selected from the group consisting of ethanol, propanol, isopropanol, acetone, methyl ethyl ketone, methyl acetate, ethyl acetate, and combinations thereof; wherein the ink optionally includes water up to about 5% by weight of the ink; wherein the binder resin is present in an amount from about 0.3 to about 8% by weight of the ink; wherein the organic solvent is present in an amount 60% or more by weight of the ink; wherein the humectant is present in an amount from about 3% to about 40% by weight of the ink and is selected from polyol, glycol ether, diacetone alcohol and mixtures thereof; and wherein the ink is suitable for use in a thermal ink jet printer and has a decap time of at least about 1 minute. ### Claim 2 (depends on 1) The ink of claim 1, wherein the resin is selected from the group consisting of phenolic resin, styrene-acrylic resin, polyketone resin, and combinations thereof. ### Claim 3 (depends on 1) The ink of claim 1, wherein the surfactant comprises a non-ionic surfactant. ### Claim 4 (depends on 1) The ink of claim 1, wherein the surfactant comprises an ionic surfactant. ### Claim 5 (depends on 1) The ink of claim 1, wherein the surfactant comprises a fluorosurfactant, a siloxane-based surfactant, a hydrocarbon-based surfactant, or a combination thereof. ### Claim 6 (depends on 1) The ink of claim 1, wherein the surfactant comprises a fluorosurfactant. ### Claim 7 (depends on 1) The ink of claim 1, wherein the surfactant is present in an amount of less than about 1% by weight of the ink. ### Claim 8 (depends on 1) The ink of claim 1, wherein the surfactant is present in an amount of from about 0.1% to about 2% by weight of the ink. ### Claim 9 (depends on 1) The ink of claim 1, wherein the organic solvent has a relative evaporation rate of less than about 0.1. ### Claim 10 (depends on 1) The ink of claim 1, wherein the organic solvent has a relative evaporation rate of less than about 0.01. ### Claim 11 (depends on 1) The ink of claim 1, wherein the ink has a drying time of less than about 5 seconds. ### Claim 12 (depends on 1) The ink of claim 1, wherein the ink has a viscosity of less than about 10 centipoise. ### Claim 13 (depends on 1) The ink of claim 1, wherein the ink has a surface tension of from about 20 dynes/cm to about 50 dynes/cm. ### Claim 14 (depends on 1) A method of forming a mark on a substrate, the method comprising: transferring an ink of claim 1 to the substrate to provide a mark on the substrate. ### Claim 15 (depends on 14) The ink of claim 14, wherein the substrate comprises a porous or a non-porous substrate. ### Claim 16 (depends on 1) An inkjet printer comprising a printhead, a cartridge, and a reservoir including an ink of claim 1. ### Claim 17 (depends on 1) The ink of claim 1, wherein the organic solvent comprises ethanol. ### Claim 18 (depends on 1) The ink of claim 1, wherein the ink has a drying time of less than about 2 seconds. ### Claim 19 (depends on 1) The ink of claim 1, wherein the organic solvent comprises methyl ethyl ketone. ### Claim 20 (depends on 1) The ink of claim 1, wherein the ink optionally includes water up to about 2% by weight of the ink.