Pigment dispersion, method for producing pigment dispersion, water-based ink composition comprising pigment dispersion, ink jet recording method using ink composition and ink jet recorded matter using ink composition
First Claim
1. A pigment dispersion at least comprising a pigment, a water-insoluble polymer that coats the pigment to make the pigment dispersible in water, a wetting agent, and water,wherein the pigment dispersion is prepared by heating a dispersion at least containing the pigment, the water-insoluble polymer, and 0.1 mass % to 10 mass % of the wetting agent relative to the total amount of the dispersion.
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Abstract
A water-based ink composition that has high ejection stability even when it is used in an ink jet recording method that involves a high driving frequency and that can achieve high-resolution printing, a pigment dispersion for use in the water-based ink composition, and a method for producing the pigment dispersion are provided. Moreover, an inkjet recording method and a recorded matter using the water-based ink composition are provided.
A pigment dispersion of the present invention is a pigment dispersion at least containing a pigment, a water-insoluble polymer that coats the pigment to make the pigment dispersible in water, a wetting agent, and water, wherein the pigment dispersion is prepared by heating a dispersion at least containing the pigment, the water-insoluble polymer, and 0.1 mass % to 10 mass % of the wetting agent relative to the total amount of the dispersion.
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Citations
18 Claims
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1. A pigment dispersion at least comprising a pigment, a water-insoluble polymer that coats the pigment to make the pigment dispersible in water, a wetting agent, and water,
wherein the pigment dispersion is prepared by heating a dispersion at least containing the pigment, the water-insoluble polymer, and 0.1 mass % to 10 mass % of the wetting agent relative to the total amount of the dispersion.
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7. A method for producing a pigment dispersion for use in a water-based ink composition, the method comprising:
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a heat treatment step of heating a dispersion at least containing a pigment, a water-insoluble polymer that coats the pigment to make the pigment dispersible in water, and a wetting agent, wherein, in the heat treatment step, the total amount of the wetting agent is in the range of 0.1 mass % to 10 mass % relative to the total amount of the dispersion. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification