Abstract: A pigment composition including at least one pigment selected from the group consisting of a perinone-based pigment and a perylene-based pigment, water, a resin having a constitutional unit represented by Formula 1, and at least one compound selected from the group consisting of a phthalimide compound having a carboxyalkyl group and a naphthalimide compound having a carboxyalkyl group; a method for producing thereof; and an aqueous ink composition using the pigment composition. In Formula 1, R1 represents a hydrogen atom or a methyl group, L2 represents —C(?O)O—, —OC(?O)—, or —C(?O)NR2— and R2 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and R3 represents an alkyl group having 6 or more carbon atoms.

Abstract: An ink composition is an ink composition including titanium dioxide particles, metal oxide particles, a dispersant, and water, in which an average particle diameter of the titanium dioxide particles is 100 nm or greater, an average particle diameter of the metal oxide particles is smaller than the average particle diameter of the titanium dioxide particles, and the metal oxide particles are oxide particles of at least one metal selected from the group consisting of zirconium, aluminum, silicon, zinc, and iron.

Abstract: An ink set includes a first ink composition containing water, a dispersant, a colorant, and an ampholyte; and a second ink composition containing water, a colorant, and a resin containing an unneutralized acid group.

Abstract: A pigment composition including at least one pigment selected from the group consisting of a perinone-based pigment and a perylene-based pigment, water, a resin having a constitutional unit represented by Formula 1, and at least one compound selected from the group consisting of a phthalimide compound having a carboxyalkyl group and a naphthalimide compound having a carboxyalkyl group; a method for producing thereof; and an aqueous ink composition using the pigment composition. In Formula 1, R1 represents a hydrogen atom or a methyl group, L2 represents —C(?O)O—, —OC(?O)—, or —C(?O)NR2— and R2 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and R3 represents an alkyl group having 6 or more carbon atoms.

Abstract: Provided are an aqueous pigment dispersion including: water; a water-soluble organic solvent; a pigment; a polymer dispersant including 20 mass % to 60 mass % of a constitutional unit a-1 represented by Formula 1 with respect to the total mass of the polymer dispersant, 10 mass % to 40 mass % of a constitutional unit a-2 represented by Formula 2 with respect to the total mass of the polymer dispersant, and a constitutional unit a-3 having an acidic group; and an amine compound represented by Formula 3, and an aqueous ink composition using the aqueous pigment dispersion.

Abstract: The present invention provides a pigment dispersion and a method of producing the pigment dispersion. The pigment dispersion includes: water; a pigment; a pigment dispersing polymer; and a rosin acid that includes at least one selected from the group consisting of abietic acid, salts of abietic acid, dihydroabietic acid and salts of dihydroabietic acid, and a total content of abietic acid, salts of abietic acid, dihydroabietic acid and salts of dihydroabietic acid is 50% by mass or higher with respect to a total mass of the rosin acid contained in the pigment dispersion. The pigment dispersion is excellent in terms of dispersibility, storage stability after dispersion, and jettability when used for an inkjet recording ink.

Abstract: A non-aqueous electrolyte secondary battery is capable of suppressing a local reaction of a negative electrode active material due to the electrolyte during charging and discharging and improving a capacity retention ratio of a using a carbon material such as artificial graphite particles for the negative electrode active material. The non-aqueous electrolyte secondary battery includes a negative electrode containing a carbon-based negative electrode active material, an electrolyte layer, and a positive electrode containing a positive electrode active material, and having a tap density of the negative electrode active material of 0.96 g/cc or more.

Abstract: Provided are a method for producing an aqueous inkjet pigment dispersion, including producing a mixed liquid of water, a pigment, a pigment dispersing polymer, and rosin acid in an amount of from 3% by mass to 30% by mass relative to the total mass of the pigment, and reducing the amount of rosin acid included in the produced mixed liquid, to less than 3.0% by mass relative to the total mass of the pigment; an aqueous inkjet pigment dispersion; and an aqueous inkjet ink.

Abstract: A non-aqueous electrolyte secondary battery is capable of suppressing a local reaction of a negative electrode active material due to the electrolyte during charging and discharging and improving a capacity retention ratio of a using a carbon material such as artificial graphite particles for the negative electrode active material. The non-aqueous electrolyte secondary battery includes a negative electrode containing a carbon-based negative electrode active material, an electrolyte layer, and a positive electrode containing a positive electrode active material, and having a tap density of the negative electrode active material of 0.96 g/cc or more.

Abstract: A ceramic electronic component that includes a ceramic element, and baked electrodes on a surface of the ceramic element. A resin film is formed at boundary sites between the ceramic element and the baked electrodes. The resin film includes a resin, and a cationic element that is a constituent element of the glass component in the baked electrodes.

Abstract: Provided are a method for producing an aqueous inkjet pigment dispersion, including producing a mixed liquid of water, a pigment, a pigment dispersing polymer, and rosin acid in an amount of from 3% by mass to 30% by mass relative to the total mass of the pigment, and reducing the amount of rosin acid included in the produced mixed liquid, to less than 3.0% by mass relative to the total mass of the pigment; an aqueous inkjet pigment dispersion; and an aqueous inkjet ink.

Abstract: The present invention provides a pigment dispersion and a method of producing the pigment dispersion. The pigment dispersion includes: water; a pigment; a pigment dispersing polymer; and a rosin acid that includes at least one selected from the group consisting of abietic acid, salts of abietic acid, dihydroabietic acid and salts of dihydroabietic acid, and a total content of abietic acid, salts of abietic acid, dihydroabietic acid and salts of dihydroabietic acid is 50% by mass or higher with respect to a total mass of the rosin acid contained in the pigment dispersion. The pigment dispersion is excellent in terms of dispersibility, storage stability after dispersion, and jettability when used for an inkjet recording ink.

Abstract: A ceramic electronic component that includes a ceramic element, and baked electrodes on a surface of the ceramic element. A resin film is formed at boundary sites between the ceramic element and the baked electrodes. The resin film includes a resin, and a cationic element that is a constituent element of the glass component in the baked electrodes.

Abstract: The invention provides a chroman derivative represented by the following Formula (I) that enables the production of an SMTP compound having a desired structure: wherein, in Formula (I), each of Y1 and Y2 independently represents a hydrogen atom, a hydroxy group, an alkoxy group, an aryloxy group, or a halogen atom; each of R1 and R2 independently represents a hydrogen atom, an alkyl group, an aryl group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, or a carbamoyl group; L represents an aliphatic hydrocarbon group having from 4 to 10 carbon atoms; each X independently represents a hydroxy group or a carboxy group; and n represents an integer from 0 to 2.

Abstract: The invention provides a chroman derivative represented by the following Formula (I) that enables the production of an SMTP compound having a desired structure: wherein, in Formula (I), each of Y1 and Y2 independently represents a hydrogen atom, a hydroxy group, an alkoxy group, an aryloxy group, or a halogen atom; each of R1 and R2 independently represents a hydrogen atom, an alkyl group, an aryl group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, or a carbamoyl group; L represents an aliphatic hydrocarbon group having from 4 to 10 carbon atoms; each X independently represents a hydroxy group or a carboxy group; and n represents an integer from 0 to 2.

Abstract: The present invention provides an ink composition having excellent jetting stability, which contains water, a cross-liked polymer-coated pigment in which at least a portion of a surface of the pigment is covered with a cross-liked polymer, a free polymer that is not bound to the cross-liked polymer-coated pigment, and at least one divalent metal ion in an amount of from 30 ppm to 200 ppm with respect to the total mass of the ink composition, and an ink set and an image forming method using the same, which are excellent in jetting stability.

Abstract: Disclosed is an ink set including: an ink composition containing at least water, a pigment, and a resin at least partially coating a surface of the pigment and having a structural unit represented by the following Formula (1) and a structural unit having an ionic group; and a treatment liquid containing a cationic polymer having reactivity to the pigment at least partially coated with the resin, wherein, in Formula (1), R1 represents a hydrogen atom, a methyl group or a halogen atom; L1 represents *—COO—, *—OCO—, *—CONR2—, *—O—, or a substituted or unsubstituted phenylene group; R2 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms; the symbol “*” in the L1 represents a bond linked to the main chain; and L2 represents a single bond or a bivalent linking group having 1 to 30 carbon atoms.

Abstract: An aqueous pigment dispersion including: (A) a pigment; (B) a dispersion polymer having a neutralization degree of from 50% to 90% and a solubility of from 0.2 g to 0.8 g per 5 ml of water (25° C.), and containing an acidic group and a hydrophobic structural unit (a) having an aromatic ring linked via a linking group to an atom included in a main chain, a content ratio of the aromatic ring being from 10% by mass to less than 20% by mass based on a total mass of the polymer; and (C) a water-based liquid medium.

Abstract: A water-based black ink composition for ink jet recording including: a carbon black pigment at least partially coated with a water-insoluble first dispersant polymer containing a structural unit represented by the following formula (1) and a structural unit different from the structural unit represented by the following formula (1); a coloring pigment selected from the group consisting of a phthalocyanine pigment, a quinacridone pigment and an azo pigment, the coloring pigment being at least partially coated with the first dispersant polymer or a second dispersant polymer consisting of the same structural units as the structural units constituting the first dispersant polymer but having a composition ratio of the structural units different from a composition ratio of the structural units of the first dispersant polymer; and an aqueous medium:

Abstract: Disclosed is an ink set including: an ink composition containing at least water, a pigment, and a resin at least partially coating a surface of the pigment and having a structural unit represented by the following Formula (1) and a structural unit having an ionic group; and a treatment liquid containing a cationic polymer having reactivity to the pigment at least partially coated with the resin, wherein, in Formula (1), R1 represents a hydrogen atom, a methyl group or a halogen atom; L1 represents *—COO—, *—OCO—, *—CONR2—, *—O—, or a substituted or unsubstituted phenylene group; R2 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms; the symbol “*” in the L1 represents a bond linked to the main chain; and L2 represents a single bond or a bivalent linking group having 1 to 30 carbon atoms.