Abstract:
The first invention relates to a water-based ink for ink-jet printing which includes colorant-containing polymer particles (A) obtained by dispersing a colorant with a water-soluble polymer (x) and a water-insoluble polymer (y), a water-soluble organic solvent (B) and water, wherein a weight ratio of the water-insoluble polymer (y) to the water-soluble polymer (x) [(y)/(x)] is from 2.0 to 5.0, and a content of the water-soluble organic solvent (B) in the ink is from 10 to 70% by weight. The water-based ink for ink-jet printing according to the first invention is excellent in ejection property and optical density and exhibits a low viscosity. The second invention relates to a process for producing a water dispersion for ink-jet printing, which includes a step (I) of mixing a dispersion of a colorant with an emulsion of a water-insoluble polymer containing an organic solvent; a step (II) of subjecting the resulting mixture to dispersing treatment to obtain a dispersion of the colorant onto which the water-insoluble polymer is deposited; and a step (III) of removing the organic solvent from the resulting dispersion. The water dispersion produced by the process of the second invention is capable of exhibiting a high optical density suitable for high-speed printing.
Abstract:
K17-103 Provided is a method for producing an inorganic oxide in the form of a thin film, the method including a step of bringing a first liquid and a second liquid with each other, the first liquid containing an inorganic oxide precursor and the second liquid containing a 5 substance reacting with the inorganic oxide precursor of the first liquid to form an inorganic oxide derived from the inorganic oxide precursor. The step is performed by continuous operation. At least one of the first liquid and the second liquid includes an ionic liquid.
Abstract:
K17-104 Provided is a method for producing an inorganic oxide in the form of a thin film, the method including a step of bringing a first liquid and a second liquid into contact with each other, the first liquid having an inorganic oxide precursor dissolved therein, the second liquid phase-separating from the first liquid and having a substance dissolved therein, the 5 substance reacting with the inorganic oxide precursor of the first liquid to form an inorganic oxide derived from the inorganic oxide precursor. The segment size of the first liquid at the time of contact between the first and second liquids is 500 µm or smaller.