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AssigneeCabot Corporation
InventorsQingling Zhang, Lynne K. LaRochelle Richard
Estimating the term…
Disclosed herein is a method of making a modified pigment, comprising: reacting, under Mitsunobu conditions: (a) a first reactant comprising a protonated nucleophile having a pKa<15, and (b) a second reactant comprising a hydroxyl-containing organic group, wherein a pigment is attached to either the first or second reactant. The method further comprises forming the modified pigment having attached an organic species comprising the nucleophile bonded to the organic group, with the net elimination of a proton and a hydroxyl. Also disclosed herein are modified pigments, which can have applications in chemical toners, inkjet ink and electrophoretic ink compositions, black matrix materials, color filters, and coatings.
1-41. (canceled)
A modified pigment comprising a pigment attached to an organic group via an —N—C— bond, wherein the nitrogen atom of the —N—C— bond is native to the pigment and the carbon atom of the —N—C— bond, and substituents thereof, are not native to the pigment prior to modification.
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A modified pigment comprising an organic pigment attached to an organic group via an —O—C— bond, wherein the —O—C— bond forms phenolate or naphtholate linkages, and wherein the phenolate or naphtholate linkages have aromatic groups that are native to the pigment, and wherein the carbon atom of the —O—C— bond, and substituents thereof, are not native to the pigment prior to modification.
49-50. (canceled)
52-53. (canceled)
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Dependencies are inferred from the claim text.