HIGH TRANSPARENCY PIGMENTS
First Claim
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1. A method for producing a conditioned pigment comprising:
- (a) milling a pigment with a dispersant comprising polyurethane; and
(b) isolating the resulting slurry.
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Abstract
The present invention provides a method for preparing conditioned pigments that have smaller diameter and increased color strength, masstone and travel by milling pigment with a dispersant comprising polyurethane. Further, the invention provides the conditioned pigments prepared by the method of the invention and their applications to paints, coatings, inks, plastics, optical devices, color filters and so forth.
27 Citations
23 Claims
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1. A method for producing a conditioned pigment comprising:
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(a) milling a pigment with a dispersant comprising polyurethane; and (b) isolating the resulting slurry. - View Dependent Claims (3, 5, 6, 7, 8, 9, 10, 11, 12, 17, 18, 19, 20, 21, 22, 23)
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- 2. The method of claim 2 wherein the pigment is a perylene.
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13. (canceled)
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14. A method for improving travel of a conditioned pigment comprising:
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(a) milling a pigment with a dispersant comprising polyurethane for a sufficient period of time; and (b) drying the resulting slurry.
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15. (canceled)
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16. A method for improving travel of a conditioned pigment comprising:
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(a) milling a pigment with a dispersant comprising polyurethane for a sufficient period of time; and (b) drying the resulting slurry.
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Specification