# US 7,611,570 B2 · Ink jet recording ink, recording method and recording apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,611,570 B2 - Document ID: US7611570B2 - Status: Granted - Kind: B2 - Application number: 11/730,828 - Filed: 2007-04-04 - Published: 2007-11-08 - Granted: 2009-11-03 - Earliest claimed: 2006-04-05 - Assignees: Canon Kabushiki Kaisha - Inventors: Shoji Koike; Ryota Kato - Web page: https://patentgrep.com/patent/US7611570B2 ## CPC - 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) ## Abstract An ink jet recording ink is provided which does not have a problem concerning curling of a recording medium containing cellulose, and can deal with high-definition image recording while maintaining good response at a high level during ejection at a high drive frequency and good startup properties. The ink contains water, a colorant, a compound represented by the following general formula (I) accounting for 8 to 40% by mass of the total mass of the ink, and plural types of nonionic surfactants accounting for 0.3 to 5% by mass of the total mass of the ink, wherein the mass ratio (A:B) between the mass (A) of the compound represented by the general formula (I) and the mass (B) of the plural types of nonionic surfactants is in a range of 5:1 to 90:1: ## Claims ### Claim 1 An ink jet recording ink comprising at least water, a colorant, a compound represented by the following general formula (I) accounting for 8 to 40% by mass of a total mass of the ink, and plural types of nonionic surfactants accounting for 0.3 to 5% by mass of a total mass of the ink, wherein a mass ratio (A:B) between a mass (A) of the compound represented by general formula (I) and a mass (B) of the plural types of nonionic surfactants is in a range of from 5:1 to 90:1, wherein R1, R2 and R3 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R4 represents an alkylene group having 1 to 5 carbon atoms. ### Claim 2 (depends on 1) The ink jet recording ink according to claim 1, wherein the compound represented by general formula (I) is trimethyl glycine. ### Claim 3 (depends on 1) The ink jet recording ink according to claim 1, wherein one of the plural types of nonionic surfactants is an ethylene oxide adduct of acetylene glycol or polyoxyethylene alkyl ether. ### Claim 4 (depends on 1) The ink jet recording ink according to claim 1, further comprising at least one compound selected from the group consisting of a compound represented by the following general formula (II), polyalkylene glycol having a molecular weight of 200 to 1,000, polyglycerine and bishydroxyethyl sulfone; R5R6NCONHCH2CH2OH General formula (II) wherein R5 and R6 each independently represent a hydrogen atom or CnH2nOH (n is 2 or 3), and R5 and R6 are not a hydrogen atom at the same time. ### Claim 5 An ink jet recording method which conducts recording by utilizing an ink jet recording head to apply ink onto a recording medium containing cellulose where a recording area on the recording medium is 15 cm2 or more, and an amount of ink applied onto the recording medium is 0.03 to 30 mg/cm2, wherein the ink applied on the recording medium comprises at least water, a colorant, a compound represented by the following general formula (I) accounting for 8 to 40% by mass of a total mass of the ink, and plural types of nonionic surfactants accounting for 0.3 to 5% by mass of a total mass of the ink, and a mass ratio (A:B) between a mass (A) of the compound represented by the following general formula (I) and a mass (B) of the plural types of nonionic surfactants is in a range of 5:1 to 90:1, wherein R1, R2 and R3 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R4 represents an alkylene group having 1 to 5 carbon atoms. ### Claim 6 (depends on 5) The ink jet recording method according to claim 5, wherein the amount of ink applied onto the recording medium is in a range of 0.1 to 20 mg/cm2. ### Claim 7 (depends on 5) The ink jet recording method according to claim 5, wherein the recording medium containing cellulose is plain paper. ### Claim 8 (depends on 1) An ink jet recording apparatus comprising an ink storage portion for storing the ink according to claim 1, and an ink jet head for ejecting the ink.