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US 8,133,312 B2Granted
Dispersion of a water-insoluble colorant, production method thereof, recording liquid, ink set, printed article, image-forming method and image-forming apparatus using the same
AssigneeFUJIFILM Corporation
InventorsRyo Saito, Jun Matsumoto
Life of this patent
Estimating the term…
Abstract
A dispersion having particles of a water-insoluble colorant containing at least two kinds of pigments dispersed with a dispersing agent in a medium containing water, wherein the water-insoluble colorant has a crystalline structure, and a light-scattering intensity is 30,000 cps or less, when a peak value of absorbance in the visible light region is set to 1.
Claims22
A dispersion comprising:
- particles of a water-insoluble colorant containing at least two kinds of pigments dispersed with a dispersing agent in a medium containing water,
- wherein an average size of the particles is from 5 nm to 50 nm, and
- wherein the water-insoluble colorant has a crystalline structure, and a light-scattering intensity is 30,000 cps or less, when a peak value of absorbance in the visible light region is set to 1.
A recording liquid comprising:
- a dispersion comprising particles of a water-insoluble colorant containing at least two kinds of pigments dispersed with a dispersing agent in a medium containing water,
- wherein the water-insoluble colorant has a crystalline structure, and a light-scattering intensity is 30,000 cps or less, when a peak value of absorbance in the visible light region is set to 1, and
- wherein the water-insoluble colorant is contained in an amount of 0.1 to 15% by mass with respect to a total mass of the recording liquid.
An ink set comprising:
- an inkjet recording liquid,
- wherein the inkjet recording liquid is a dispersion comprising particles of a water-insoluble colorant containing at least two kinds of pigments dispersed with a dispersing agent in a medium containing water,
- wherein the water-insoluble colorant has a crystalline structure, and a light-scattering intensity is 30,000 cps or less, when a peak value of absorbance in the visible light region is set to 1, and
- wherein the water-insoluble colorant is contained in an amount of 0.1 to 15% by mass with respect to a total mass of the recording liquid.
1 more element
A dispersion comprising particles of a water-insoluble colorant containing at least two kinds of pigments dispersed with a dispersing agent in a medium, wherein an average size of the particles is from 5 nm to 50 nm, and the water-insoluble colorant has a crystalline structure.
A recording liquid comprising:
- a dispersion comprising particles of a water-insoluble colorant containing at least two kinds of pigments dispersed with a dispersing agent in a medium,
- wherein an average size of the particles is from 5 nm to 50 nm, and the water-insoluble colorant has a crystalline structure, and
- wherein the water-insoluble colorant is contained in an amount of 0.1 to 15% by mass with respect to a total mass of the recording liquid.
An ink set comprising:
- an inkjet recording liquid,
- wherein the inkjet recording liquid is a dispersion comprising particles of a water-insoluble colorant containing at least two kinds of pigments dispersed with a dispersing agent in a medium,
- wherein an average size of the particles is from 5 nm to 50 nm, and the water-insoluble colorant has a crystalline structure, and
- wherein the water-insoluble colorant is contained in an amount of 0.1 to 15% by mass with respect to a total mass of the recording liquid.
1 more element
A method of producing a dispersion containing a water-insoluble colorant, which comprises:
- (1) a step of dissolving a water-insoluble colorant together with a dispersing agent in an aprotic water-soluble organic solvent in the presence of alkali, to prepare a solution thereof;
- (2) a step of preparing a dispersion by mixing the resultant solution with an aqueous solvent, in which particles of the water-insoluble colorant and the dispersing agent are dispersed in a medium containing water;
- (3) a step of converting the particles of the water-insoluble colorant into a soft aggregate thereof, the aggregate of the water-insoluble colorant being capable of re-dispersing, and then separating the soft aggregate from the dispersion;
- (4) a step of filtrating and washing the soft aggregate with an ester series solvent or a ketone series solvent;
- and
- (5) a step of unbinding aggregation of the soft aggregate, and re-dispersing the unbound water-insoluble colorant in a re-dispersion medium, wherein particles of the water-insoluble colorant containing at least two kinds of pigments, and
- wherein the water-insoluble colorant has a crystalline structure.
4 more elements
A dispersion containing a water-insoluble colorant and produced by a method which comprises:
- (1) a step of dissolving a water-insoluble colorant together with a dispersing agent in an aprotic water-soluble organic solvent in the presence of alkali, to prepare a solution thereof;
- (2) a step of preparing a dispersion by mixing the resultant solution with an aqueous solvent, in which particles of the water-insoluble colorant and the dispersing agent are dispersed in a medium containing water;
- (3) a step of converting the particles of the water-insoluble colorant into a soft aggregate thereof, the aggregate of the water-insoluble colorant being capable of re-dispersing, and then separating the soft aggregate from the dispersion;
- (4) a step of filtrating and washing the soft aggregate with an ester series solvent or a ketone series solvent;
- and
- (5) a step of unbinding aggregation of the soft aggregate, and re-dispersing the unbound water-insoluble colorant in a re-dispersion medium, wherein particles of the water-insoluble colorant containing at least two kinds of pigments, and
- wherein the water-insoluble colorant has a crystalline structure.
4 more elements
A recording liquid containing a dispersion containing a water-insoluble colorant and produced by a method which comprises:
- (1) a step of dissolving a water-insoluble colorant together with a dispersing agent in an aprotic water-soluble organic solvent in the presence of alkali, to prepare a solution thereof;
- (2) a step of preparing a dispersion by mixing the resultant solution with an aqueous solvent, in which particles of the water-insoluble colorant and the dispersing agent are dispersed in a medium containing water;
- (3) a step of converting the particles of the water-insoluble colorant into a soft aggregate thereof, the aggregate of the water-insoluble colorant being capable of re-dispersing, and then separating the soft aggregate from the dispersion;
- (4) a step of filtrating and washing the soft aggregate with an ester series solvent or a ketone series solvent;
- and
- (5) a step of unbinding aggregation of the soft aggregate, and re-dispersing the unbound water-insoluble colorant in a re-dispersion medium, wherein particles of the water-insoluble colorant containing at least two kinds of pigments, and
- wherein the water-insoluble colorant has a crystalline structure.
4 more elements
Dependencies are inferred from the claim text.