# US 8,740,370 B2 · Liquid composition, set, liquid cartridge, inkjet recording method, and inkjet recording apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,740,370 B2 - Document ID: US8740370B2 - Status: Granted - Kind: B2 - Application number: 12/874,964 - Filed: 2010-09-02 - Published: 2011-03-10 - Granted: 2014-06-03 - Earliest claimed: 2009-09-10 - Assignees: Canon Kabushiki Kaisha - Applicants: Yukako Tamanuki; Shin-ichi Hakamada; Tomohiro Yamashita; Yasuhito Mori - Inventors: Yukako Tamanuki; Shin-ichi Hakamada; Tomohiro Yamashita; Yasuhito Mori - Web page: https://patentgrep.com/patent/US8740370B2 ## CPC - C09D 11/40: Ink-sets specially adapted for multi-colour inkjet printing - 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 A liquid composition used in combination with an ink containing a coloring material is ejected by the action of thermal energy from a recording head including a heating resistor having a protecting layer that is to come into contact with the liquid composition and that contains at least one of a metal and a metal oxide. The liquid composition contains at least either an organic compound having a carboxy group and an amino group or an amine oxide compound, an organic acid having a carboxy group, and water. ## Claims ### Claim 1 An inkjet recording method comprising: a step of ejecting a liquid composition to a recording medium by the action of thermal energy from a recording head including a heating resistor having a protecting layer that is to come into contact with the liquid composition and that contains at least one of a metal and a metal oxide; and a step of applying an ink containing a coloring material to contact with the liquid composition, wherein the liquid composition comprises: an organic compound having a carboxy group and an amino group; an organic acid having a carboxy group, and water, and wherein the liquid composition shows an absorption spectrum not having a peak in the range of 400 nm to 800 nm when it is diluted to 50 times on a mass basis with water. ### Claim 2 (depends on 1) The inkjet recording method according to claim 1, wherein the organic acid having the carboxy group comprises a dicarboxylic acid. ### Claim 3 (depends on 1) The inkjet recording method according to claim 1, wherein the pH of the liquid composition is 3.5 or more and 5.5 or less. ### Claim 4 (depends on 1) The inkjet recording method according to claim 1, wherein the content of the organic acid having the carboxy group is 3.0% or more and 15.0% or less by mass relative to the total mass of the liquid composition. ### Claim 5 (depends on 1) The inkjet recording method according to claim 1, wherein the metal comprises tantalum, and the metal oxide comprises tantalum oxide. ### Claim 6 (depends on 1) The inkjet recording method according to claim 1, wherein the step of ejecting a liquid composition is performed before the step of applying the ink. ### Claim 7 (depends on 1) The inkjet recording method according to claim 1, wherein the content of the organic compound having a carboxy group and an amino group is 4.1% or more and 7.0% or less by mass relative to the total mass of the liquid composition. ### Claim 8 An inkjet recording method comprising: a step of ejecting a liquid composition to a recording medium by the action of thermal energy from a recording head including a heating resistor having a protecting layer that is to come into contact with the liquid composition and that contains at least one of a metal and a metal oxide; and a step of applying an ink containing a coloring material to contact with the liquid composition, wherein the liquid composition comprises an amine oxide compound, an organic acid having a carboxy group, and water, and wherein the liquid composition shows an absorption spectrum not having a peak in the range of 400 nm to 800 nm when it is diluted to 50 times on a mass basis with water. ### Claim 9 (depends on 8) The inkjet recording method according to claim 8, wherein the organic acid having the carboxy group comprises a dicarboxylic acid. ### Claim 10 (depends on 8) The inkjet recording method according to claim 8, wherein the pH of the liquid composition is 3.5 or more and 5.5 or less. ### Claim 11 (depends on 8) The inkjet recording method according to claim 8, wherein the content of the organic acid having the carboxy group is 3.0% or more and 15.0% or less by mass relative to the total mass of the liquid composition. ### Claim 12 (depends on 8) The inkjet recording method according to claim 8, wherein the metal comprises tantalum, and the metal oxide comprises tantalum oxide. ### Claim 13 (depends on 8) The inkjet recording method according to claim 8, wherein the step of ejecting a liquid composition is performed before the step of applying the ink.