Abstract: The invention provides a self-dispersible polymer having one or more hydrophilic structural units and one or more aromatic group-containing structural units. The content of the aromatic group-containing structural units is in a range from 10 mass % to 95 mass % with respect to the total mass of the self-dispersible polymer, and the content of one or more water soluble components, which are contained in the self-dispersible polymer and exhibit solubility in water when the self-dispersible polymer is dispersed in a water-based medium, is 10 mass % or less with respect to the total mass of the self-dispersible polymer.

Abstract: The invention provides an aqueous colorant dispersion having: a colorant (A); a polymer (B); and an aqueous liquid medium (I), a method of producing the dispersion, and an aqueous ink for inkjet recording using the dispersion. The polymer (B) is a copolymer containing a hydrophilic structural unit and a hydrophobic structural unit. The hydrophobic structural unit contains a hydrophobic structural unit (a) containing a benzene ring which is not directly bonded to an atom that forms a main chain of the polymer (B). The hydrophilic structural unit contains a hydrophilic structural unit (b) containing an ionic group. The polymer (B) contains a structural unit (c) different from the hydrophobic structural unit (a) and the hydrophilic structural unit (b). A content of the hydrophobic structural unit and a content of the structural unit (c) with respect to a total mass of the polymer (B) are respectively in specific ranges.

Abstract: The invention provides a method of producing an inkjet ink, the method including at least subjecting a polymer particle dispersion liquid to centrifuge processing, and mixing the polymer particle dispersion liquid that has been subjected to the centrifuge processing and a water-insoluble coloring particle dispersion liquid, as well as an ink set including the produced inkjet ink and a processing liquid that causes the ink to aggregate.

Abstract: There is provided a water-based ink composition including water-insoluble colored particles, and water-insoluble particles that includes a carboxylate emulsifier and a water-insoluble polymer, and an ink set including at least one water-based ink composition, and a treating liquid that changes pH of the water-based ink composition.

Abstract: A composition comprising an organic crystal having a minor axis length of from 3 to 100 nm and a major axis length of from 10 to 2,000 nm and a matrix material, wherein the organic crystal satisfies that (1) a surfactant is adsorbed on the organic crystal, (2) an inorganic ion is adsorbed on the organic crystal, (3) silicon oxide, titanium oxide, aluminum oxide, zirconium oxide, barium oxide or hydroxyapatite is bonded with the organic crystal, or (4) the organic crystal is modified with a group represented by the following formula (1): wherein L1 represents —O—, —S—, —CO— or others, n is 0 to 4, and R1 represents an organic group.

Abstract: An ink composition includes: first particles which are insoluble and dispersed in an aqueous dispersion medium, a polarity of the first particles being one of positive and negative; and second particles which are insoluble and dispersed in the aqueous dispersion medium, the second particles including both a cationic group and an anionic group, the second particles having a zeta potential that changes along with a change in pH of the aqueous dispersion medium, percentage of a water-soluble component in the second particles being not higher than 5% by mass.

Abstract: An optical film having a recurring unit of the following formula (1) with good heat resistance and good optical properties: wherein X represents a divalent linking group containing a monocyclic or condensed polycyclic aromatic ring; Y represents a methylene group, an ethylene group or an ethenylene group; and X is represented by the following formula (2): wherein R1 and R2 each represent a halogen atom, an alkyl group, an alkoxy group or an aryl group; and m and n each indicate from 0 to 4.

Abstract: The invention provides a colored fine particle dispersion wherein colored fine particles including a dispersible polymer having both of a hydrophilic polymer moiety and a hydrophobic polymer moiety which has a glass transition temperature (Tg) of 0° C. or less and an oil-soluble dye are dispersed in an aqueous medium; an ink using the same; and an ink-jet recording method using the ink. Preferably, a content of the hydrophobic polymer moiety is from 60 to 90% by mass, and a content of the hydrophilic polymer moiety is from 10 to 40% by mass.

Abstract: A magnetic recording medium including a support having thereon a magnetic layer and a non-magnetic layer in this order, the magnetic layer being formed by applying and drying a magnetic nanoparticle dispersion liquid in which magnetic nanoparticles having a number average particle diameter of 20 nm or less are dispersed, applying the non-magnetic layer onto the magnetic layer, fixing the magnetic nanoparticles, and carrying out annealing for ferromagnetization, and the non-magnetic layer containing a gelatinous composition formed by gelating at least one selected from hydrolysates of the silane compound represented by (R10)m—Si(X)4-m and partial condensates thereof, wherein R10 represents a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; X represents a hydroxy group or hydrolyzable group; and m represents an integer from 1 to 3.

Abstract: To provide an inkjet recording head in which a high ink repelling property is kept even against the repeated use and which is excellent in film strength and abrasion resistance and is excellent with respect to printing quality of the resulting image, the inkjet recording head includes a nozzle having: a hole for discharging a recording liquid including an ink; and a portion capable of repelling the ink at the periphery of the hole, wherein the portion includes a cured film formed from a composition having a block copolymer, and the block copolymer includes: a block polymer having a fluorine-containing polymer; and a block polymer having a repeating unit having a siloxane structure.

Abstract: A photothermographic material of the present invention comprises: a support; a photosensitive silver halide; a non-photosensitive organic silver salt; a heat developer; a binder; and a fluorine compound containing a specific structure.

Abstract: To provide a radiation-curable ink composition that can form a high-quality image on not only liquid absorbing materials to be recorded but also non-liquid absorbing materials to be recorded, is superior in curing properties in air, and is superior in storage stability, color tone, light fastness and water resistance of ink, and also to provide an image recording method. The radiation-curable ink composition comprises a monomer having a polymerizable group selected from the group consisting of an acryloyl group, a methacryloyl group, an allyl group, and a vinyl group, an oil-soluble dye, and from 0.005 to 1% by weight of a storage stabilizer, wherein the oil-soluble dye is dissolved in the ink.

Abstract: To provide an inkjet recording head in which a high ink repelling property is kept even against the repeated use and which is excellent in film strength and abrasion resistance and is excellent with respect to printing quality of the resulting image, the inkjet recording head includes a nozzle having: a hole for discharging a recording liquid including an ink; and a portion capable of repelling the ink at the periphery of the hole, wherein the portion includes a cured film formed from a composition having a block copolymer, and the block copolymer includes a unit A and a unit B, wherein the unit A represents a block polymer (A) having at least one of a fluorine-containing polymer and a siloxane-containing polymer having a specific structure; and the unit B represents a block polymer (B) having a polyester polymer.

Abstract: To provide an inkjet recording head which is excellent in water repellency and wearing resistance and attains high printed-image quality, the inkjet recording head includes a nozzle having: a hole for discharging a recording liquid including an ink; and a portion capable of repelling the ink at the periphery of the hole, wherein the portion contains a crosslinked resin formed from a polymerizable composition having a fluorine-containing polymerizable polymer, and the fluorine-containing polymerizable polymer has: a first structural unit having a fluorine atom; and a second structural unit having a radical-polymerizable group.

Abstract: A colored particulate dispersion is provided, in which the particle diameter of colored particulates is small and dispersion stability is excellent. Also provided is an ink for ink-jet recording in which there is little dependency on paper such that excellent color formation and color tone are obtained when printing on a freely selected paper, and which has excellent water resistance and light resistance. The colored particulate dispersion contains colored particulates that contain an oil-soluble dye and a block copolymer, which is formed of a hydrophobic segment and a hydrophilic segment. The ink for ink-jet recording contains the colored particulate dispersion.

Abstract: An anti-reflection film that is an optical film, at least has a hard coat layer, and a low-refractive-index layer containing a binder polymer, on a transparent support, wherein said hard coat layer and/or said low-refractive-index layer contains: (a) a hydrolysate of an organosilane in which a hydroxyl group or a hydrolysable group is directly bonded to silicon, and/or a partial condensation product thereof; and (b) at least one metal chelate compound of an alkylalcohol, and a compound of R4COCH2COR5, in which R4 is an alkyl group, and R5 is an alkyl or alkoxy group, as ligands, and a metal selected from Zr, Ti and Al, as a central metal.

Abstract: The present invention provides an aqueous ink composition comprising a color microparticle dispersion including an oil-soluble dye, a hydrophilic organic solvent and a perfluoroalkylenesulfonic acid or a fluorine type surfactant other than derivatives thereof, and an ink jet method for recording an image by using this aqueous ink composition.

Abstract: The invention provides an inkjet ink which exhibits, at the printing particularly on paper, excellent ink permeability to eliminate the problem of soiling immediately after printing, can be polymerized in higher sensitivity after printing and enables the recording of an image excellent in water resistance and light fastness through polymerization curing, the inkjet ink comprising a coloring fine particle dispersion containing coloring fine particles and at least one oil-soluble dye, a polymerizable hydrophobic ethylenic unsaturated monomer and a polymerization initiator, the at least one oil-soluble dye having an oxidation potential of 1.0 V or more.

Abstract: To provide an ink composition that when printed using a nozzle, does not cause clogging at the chip of the nozzle, is free from paper dependency, and when printed on an arbitrarily chosen paper, exhibits superior properties in water resistance, scratch resistance, lightfastness and ozone resistance and an inkjet recording method using it. The ink composition contains colored fine particles containing an oil-soluble polymer and an oil-soluble dye having an oxidation potential higher than 1.0 V (vs SCE), in an aqueous medium.

Abstract: Disclosed is a silver halide photographic light-sensitive material having one or more layers including a light-sensitive silver halide emulsion layer on a support, wherein any of the layers contains the specific fluorine compound. The silver halide photographic light-sensitive material can be stably produced and is imparted with antistatic property.