Preparation of pigment dispersions and toner compositions
First Claim
Patent Images
1. A method for preparing a pigment dispersion, the method comprising:
- milling a starting pigment dispersion containing a pigment and optionally a carrier and a dispersant with milling media having an average particle size of about 100 μ
m or less and being comprised of diamond dust, until a final pigment dispersion having at least one of a desired pigment average particle size and a desired pigment particle size distribution is obtained;
separating the milling media from the final pigment dispersion; and
diluting the final pigment dispersion to obtain a desired pigment particle concentration.
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Abstract
A method for preparing a pigment dispersion includes milling a starting pigment dispersion containing a pigment and optionally a carrier and a dispersant with milling media having an average particle size of about 100 μm or less, until a final pigment dispersion having at least one of a desired pigment average particle size and a desired pigment particle size distribution is obtained; optionally separating the milling media from the final pigment dispersion; and optionally diluting the final pigment dispersion to obtain a desired pigment particle concentration.
24 Citations
12 Claims
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1. A method for preparing a pigment dispersion, the method comprising:
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milling a starting pigment dispersion containing a pigment and optionally a carrier and a dispersant with milling media having an average particle size of about 100 μ
m or less and being comprised of diamond dust, until a final pigment dispersion having at least one of a desired pigment average particle size and a desired pigment particle size distribution is obtained;separating the milling media from the final pigment dispersion; and diluting the final pigment dispersion to obtain a desired pigment particle concentration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for preparing a pigment dispersion, the method comprising:
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milling a starting pigment dispersion containing a pigment and optionally a carrier and a dispersant with milling media having an average particle size of about 100 μ
m or less and being comprised of diamond dust, until a final pigment dispersion having at least one of a desired pigment average particle size and a desired pigment particle size distribution is obtained; andseparating the milling media from the final pigment dispersion, wherein the starting pigment dispersion comprises pigment particles having an average particle size of greater than about 1 μ
m, and the final pigment dispersion comprises pigment particles having an average particle size of less than about 500 nm.
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12. A method for preparing a pigment dispersion, the method comprising:
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milling a starting pigment dispersion containing a pigment and optionally a carrier and a dispersant with milling media having an average particle size of about 100 μ
m or less and comprising aspherical diamond dust, until a final pigment dispersion having at least one of a desired pigment average particle size and a desired pigment particle size distribution is obtained;separating the milling media from the final pigment dispersion; and diluting the final pigment dispersion to obtain a desired pigment particle concentration.
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Specification