INK, INK CARTRIDGE, AND IMAGE-RECORDING METHOD

摘要

An ink including: a self-dispersing pigment; polymer particles; a surfactant; a water-soluble organic solvent; and water, wherein the amount of anionic functional group on the surface of the polymer particles is 0.2 mmol/g or less, the surfactant is represented by the general formula (1) and contains a fluorinated surfactant having a hydrophile-lipophile balance (HLB) of 11 or less as determined by a Griffin method, and the water-soluble organic solvent contains at least one water-soluble organic solvent selected from glycerin, ethylene glycol, diethylene glycol, poly(ethylene glycol) having a weight-average molecular weight of 10,000 or less, 1,3-propanediol, 1,4-butanediol, and diglycerol.

主权项

1. An ink comprising: a self-dispersing pigment; polymer particles; a surfactant; a water-soluble organic solvent; and water,
wherein an amount of anionic functional group on the surface of the polymer particles is 0.2 mmol/g or less, the surfactant is represented by the following general formula (1) and contains a fluorinated surfactant having a hydrophile-lipophile balance (HLB) of 11 or less as determined by a Griffin method,
R1(CR2R3)nCH2CH2(OCH2CH2)mOH  (1) wherein R1 denotes a fluorine atom or a hydrogen atom, R2 and R3 independently denote a fluorine atom or a hydrogen atom, and at least one of R2 and R3 denotes a fluorine atom, n is 1 or more and 30 or less, and m is 1 or more and 60 or less, and the water-soluble organic solvent contains at least one water-soluble organic solvent selected from the following group A: glycerin, ethylene glycol, diethylene glycol, poly(ethylene glycol) having a weight-average molecular weight of 10,000 or less, 1,3-propanediol, 1,4-butanediol, and diglycerol.