Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing ink containing dispersed colorant, having good dispersion stability and fixability of the ink, capable of forming an image having high water resistance and applicable to a wide variety of colorants. SOLUTION: The method for the production of the ink contains a step to dissolve a water-insoluble colorant in a solvent immiscible with water, a step to emulsify and disperse the obtained colorant solution in an aqueous medium in the present of a block copolymer having a polyvinyl ether structure containing at least a hydrophobic part and a hydrophilic part and a step to remove the solvent of the colorant solution by distillation. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide ink for inkjet recording which has high solidity and can record high-quality images stably for a long period of time in any case. SOLUTION: The ink for inkjet recording contains a polymer dispersing agent, a water-insoluble color material, a water-soluble organic solvent and water. The polymer dispersing agent is a block copolymer which at least has at least one hydrophobic block and at least one hydrophilic block and whose individual block is constituted by vinyl ethers as its monomer. The water-insoluble color material is a predetermined pigment. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an ink for inkjet recording with which high fastness and excellent quality images are recorded consistently for long period of time in any circumstances. SOLUTION: The ink contains a polymer dispersant, a water-insoluble colorant, a water-soluble organic solvent and water. The polymer dispersant is a block copolymer consisting of at least one kind of hydrophobic block and at least one kind of hydrophilic block. Each of the blocks is constituted of a vinyl ether. The water-soluble organic solvent contains at least a cyclic ether. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a magenta ink for ink-jet recording enabling stable recording of an image having high fastness and excellent picture quality over a long period independent of the recording condition. SOLUTION: The magenta ink for ink-jet recording is composed of a polymer dispersant, a water-insoluble coloring material, a water-soluble organic solvent and water. The water-insoluble coloring material is one or more materials selected from C.I.Solvent Red 8, C.I.Solvent Red 49, C.I.Solvent Red 83:1, C.I.Solvent Red 91, C.I.Solvent Red 127 and C.I.Solvent Red 218, and the polymer dispersant is a block copolymer composed of a hydrophobic block and a hydrophilic block and produced by polymerizing a vinyl ether as the monomer. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a pigment dispersion stably recording an image having high fastness and excellent grade over a long period of time in any case, to provide ink, to provide an ink cartridge, and to provide an inkjet recording apparatus. SOLUTION: The pigment dispersion consists essentially of a polymer dispersant, a pigment, and water. In the pigment dispersion, the polymer dispersant is a straight-chain copolymer composed of at least a hydrophobic unit and a hydrophilic unit, and the hydrophobic unit has a block part composed of at least one hydrophobic monomer. The solubility parameter of the hydrophilic unit is characterized by falling within the range of +2 to +14 (J/cm 3 ) 1/2 based on the solubility parameter of the block part composed of the hydrophobic monomer of the hydrophobic unit. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide ink stably recording an image having high fastness and excellent quality over a long period even in any case and to provide an ink cartridge and an apparatus for inkjet recording. SOLUTION: The ink comprises a polymer dispersing agent which is a copolymer of at least (1) a vinyl monomer having a substituent containing an aromatic hydrocarbon group and (2) a vinyl monomer containing a carboxylic acid group, at least glycerol as a water-soluble organic solvent and at least an ethylene oxide-propylene oxide copolymer as a sedimentation inhibitor. The ink cartridge and apparatus for inkjet recording are provided. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide aqueous ink for inkjet, capable of recording an image having high fastness and excellent in grade stably for a long period, further a method of inkjet-recording capable of recording the image excellent in the fastness and grade, an ink cartridge and a device of the inkjet-recording containing such the ink. SOLUTION: This aqueous ink for inkjet containing mainly a water-insoluble coloring matter, a water-soluble organic solvent, a supplemental component and water is characterized by at least containing an ethylene oxide adduct with the esters of cholesterol, lanosterol or agnosterol with a hydroxy fatty acid as the supplemental component. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an ink for inkjet recording capable of stably recording image having high fastness and excellent in quality appearance over a long period under any circumstances. SOLUTION: The ink for inkjet recording comprises at least: a pigment; (a) a block copolymer composed of a hydrophobic block composed of one or more vinyl ethers and a hydrophilic block of one or more vinyl ethers and (b) a nonionic surfactant having an oxyethylene group, each used for dispersing the pigment; a water-soluble organic solvent; and water. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an ink jet recording ink which has a good extrusion performance and can stably record images having good fastness and grades. SOLUTION: This method for producing a colorant dispersion type ink consisting mainly of a polymer dispersant comprising a block copolymer composed of an anionic hydrophilic group-having hydrophilic block and a hydrophobic block, a water-insoluble colorant, a water-soluble organic solvent and water is characterized by having at least (1) the first process for mixing a colorant dispersion consisting mainly of the polymer dispersant, the water-insoluble colorant and the water with the water and the water-soluble organic solvent to produce the ink, (2) the second process for thermally treating the ink produced in the first process to lower pH, and (3) the third process for filtering the ink obtained in the second process. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To produce a colored dispersion that has excellent storage stability and provides an image having high color development and high fastness and ink for inkjet recording that stably records an image having excellent color development and fastness. SOLUTION: The method for producing the colored dispersion consisting essentially of a water-insoluble colorant used for ink, a polymer dispersant and water comprises a first process to a fourth process. COPYRIGHT: (C)2006,JPO&NCIPI