Abstract: To provide a pigment dispersion liquid which provides an ink capable of recording an image having high fixability and fastness such as scratch resistance and excellent quality stably for a long time in any conditions. A pigment dispersion liquid mainly containing a polymer dispersant, a coloring material and water, in which the polymer dispersant is formed of at least a hydrophobic unit and a hydrophilic unit, the hydrophobic unit having a block portion formed of at least one hydrophobic monomer, the coloring material is formed of a pigment having on its surface an acid form anionic group, and the pigment dispersion liquid further contains a basic compound capable of forming a complex with an alkaline metal.

Abstract: A pigment dispersion liquid capable of stably recording images having high fastness and excellent quality for a long term in any cases has been provided. A pigment dispersion liquid mainly containing a polymer dispersant, a pigment and water, wherein the polymer dispersant is a copolymer comprised of at least a hydrophobic unit and a hydrophilic unit, the hydrophobic unit has a block portion comprised of at least one hydrophobic monomer, the hydrophilic unit has at least a repeating unit structure of an acrylamide structure of the following general formula (1), and the segment number (A) of the block portion comprised of a hydrophobic monomer to the number (B) of all segments of the polymer dispersant is in a range of 0.07 to 0.85 in terms of A/B ratio.

Abstract: Disclosed herein is a resin-containing composition comprising a solvent, a coloring material insoluble in the solvent and a block polymer compound having a repeating structural unit represented by the following general formula (1): wherein X is a polyalkenyl group which may be substituted, A is a linear or branched alkylene group having 1 to 15 carbon atoms, which may be substituted, at least one CH2 of the alkylene group may be substituted by O, m is an integer of from 0 to 30, the respective A groups may be different from each other when m is plural, Y is at least one of S, O and Se with the proviso that Y contains at least one S and that S, O and Se are each linked via a single bond, and R is a linear or branched alkyl group which may be substituted, an aromatic ring which may be substituted, or a structure in which at most 3 fused rings or aromatic rings, which may be substituted, are bonded via a single bond.

Abstract: To provide a pigment dispersion liquid which provides an ink capable of recording an image having high fixability and fastness such as scratch resistance and excellent quality stably for a long time in any conditions. A pigment dispersion liquid mainly containing a polymer dispersant, a coloring material and water, in which the polymer dispersant is formed of at least a hydrophobic unit and a hydrophilic unit, the hydrophobic unit having a block portion formed of at least one hydrophobic monomer, the coloring material is formed of a pigment having on its surface an acid form anionic group, and the pigment dispersion liquid further contains a basic compound capable of forming a complex with an alkaline metal.

Abstract: A pigment dispersion liquid capable of stably recording images having high fastness and excellent quality for a long term in any cases has been provided. A pigment dispersion liquid mainly containing a polymer dispersant, a pigment and water, wherein the polymer dispersant is a copolymer comprised of at least a hydrophobic unit and a hydrophilic unit, the hydrophobic unit has a block portion comprised of at least one hydrophobic monomer, the hydrophilic unit has at least a repeating unit structure of an acrylamide structure of the following general formula (1), and the segment number (A) of the block portion comprised of a hydrophobic monomer to the number (B) of all segments of the polymer dispersant is in a range of 0.07 to 0.85 in terms of A/B ratio.

Abstract: In the present invention, an inkjet recording ink can be provided, which ink can record stably an image with good fastness and elegant-quality over a long period in any conditions. The ink includes a high-molecular dispersant, a water-insoluble colorant, water-soluble organic solvent and water, in which the high-molecular dispersant is a block copolymer including at least one hydrophobic block and at least one hydrophilic block, which have been obtained by polymerizing vinyl ethers as monomers, respectively; and the water-insoluble colorant is a specific pigment. Further the present invention can provide a inkjet recording method, an inkjet cartridge, and an inkjet recording system.

Abstract: An inkjet recording ink is composed of an encapsulated water-insoluble colorant encapsulated with a high-molecular dispersant, a water-soluble organic solvent, and water. The water-insoluble colorant is at least one colorant selected from the group consisting of C.I. Solvent Yellow 21, 42, 79, 82, 83:1, 88 and 151, at least one colorant selected from the group consisting of C.I. Solvent Red 8, 49, 83:1, 91, 127 and 218, at least one colorant selected from the group consisting of C.I. Solvent Black 3, 27, 29 and 45, or at least one colorant selected from the group consisting of C.I. Solvent Blue 25, 38, 44, 67 and 70. The high-molecular dispersant is a block copolymer comprising at least one hydrophobic block and at least one hydrophilic block, which have been obtained by polymerizing vinyl ethers as monomers, respectively. The inkjet recording ink can stably record images of high fastness and excellent quality over a long period even under severe environmental conditions.

Abstract: A water-based inkjet printer ink contains at least a colorant and a resin. The resin is a block copolymer, which contains at least one hydrophilic block and at least one hydrophobic block. Each of the blocks is a vinyl ether polymer, wherein said block copolymer is obtained by polymerizing vinyl ethers as monomer by using at least one aluminum compound selected from the group consisting of tripropylaluminum, triisopropylaluminum and aluminum compounds as Ziegler-Natta catalysts.

Abstract: In the present invention, an inkjet recording ink can be provided, which ink can record stably an image with good fastness and elegant-quality over a long period in any conditions. The ink comprises a high-molecular dispersant, a water-insoluble colorant, water-soluble organic solvent and water, in which the high-molecular dispersant is a block copolymer comprising at least one hydrophobic block and at least one hydrophilic block, which have been obtained by polymerizing vinyl ethers as monomers, respectively; and the water-insoluble colorant is a specific pigment. Further the present invention can provide a inkjet recording method, an inkjet cartridge, and an inkjet recording system.

Abstract: A water-based ink for inkjet printers contains at least a water-insoluble colorant, a block copolymer of a polyvinyl ether structure comprising at least one kind of hydrophilic segments and at least one kind of hydrophobic segments, water and an alkali. Each of the hydrophilic segments contains acidic groups. A content of the alkali is such that, when an infrared absorption intensity ascribable to ionic groups to be formed upon addition of an excess amount of the alkali to the block copolymer is supposed to be 100%, an infrared absorption intensity ascribable to ionic groups formed by dissociation of the acidic groups contained in the block copolymer becomes at least 80%, with a proviso that the content does not exceed twice as much as a smallest amount of the alkali that an infrared absorption intensity ascribable to ionic groups to be formed from the block copolymer becomes 100%.

Abstract: Disclosed herein is a resin-containing composition comprising a solvent, a coloring material insoluble in the solvent and a block polymer compound having a repeating structural unit represented by the following general formula (1): wherein X is a polyalkenyl group which may be substituted, A is a linear or branched alkylene group having 1 to 15 carbon atoms, which may be substituted, at least one CH2 of the alkylene group may be substituted by O, m is an integer of from 0 to 30, the respective A groups may be different from each other when m is plural, Y is at least one of S, O and Se with the proviso that Y contains at least one S and that S, O and Se are each linked via a single bond, and R is a linear or branched alkyl group which may be substituted, an aromatic ring which may be substituted, or a structure in which at most 3 fused rings or aromatic rings, which may be substituted, are bonded via a single bond.

Abstract: An inkjet recording ink is composed of a high-molecular dispersant, a water-insoluble colorant, a water-soluble organic solvent, and water. The water-insoluble colorant is at least one colorant selected from the group consisting of C.I. Solvent Yellow 21, 42, 79, 82, 83:1, 88 and 151, at least one colorant selected from the group consisting of C.I. Solvent Red 8, 49, 83:1, 91, 127 and 218, at least one colorant selected from the group consisting of C.I. Solvent Black 3, 27, 29 and 45, or at least one colorant selected from the group consisting of C.I. Solvent Blue 25, 38, 44, 67 and 70. The high-molecular dispersant is a block copolymer comprising at least one hydrophobic block and at least one hydrophilic block, which have been obtained by polymerizing vinyl ethers as monomers, respectively. The inkjet recording ink can stably record images of high fastness and excellent quality over a long period even under severe environmental conditions.

Abstract: A water-based inkjet printer ink contains at least a colorant and a resin. The resin is a block copolymer, which contains at least one hydrophilic block and at least one hydrophobic block. Each of the blocks is a vinyl ether polymer. The ink further contains aluminum or an aluminum compound.