Polymers and other groups attached to pigments and subsequent reactions
AssigneeCabot Corporation
InventorsPaul S. Palumbo, Curtis E. Adams
Life of this patent
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Abstract
Methods of making a modified pigment by reacting a first chemical group and a second chemical group to form a pigment having attached a third chemical group. The first chemical group includes at least one nucleophile and the second chemical group includes at least one electrophile, or vice versa. Resulting modified pigments, and ink compositions containing such pigments, are also described.
Claims27
A modified pigment comprising a pigment having attached at least one organic group, wherein said organic group comprises:
- the reaction product of at least one electrophile and a nucleophilic polymer which is then further reacted with an acylating agent, wherein the organic group is attached by reacting a diazonium salt having the electrophile with at least one type of pigment and wherein the electrophile is selected from the group consisting of:
- acyl azides, isocyanates, ketones, aldehydes, anhydrides, amides, imides, imines, α,β-unsaturated ketones and aldehydes, alkyl halides, epoxides, alkyl sulfonates and sulfates, aromatic compounds which undergo addition-elimination reactions, and salts and derivatives thereof.
An ink composition comprising a liquid vehicle and a modified pigment, wherein the modified pigment comprises a pigment having attached at least one organic group, wherein said organic group comprises:
- the reaction product of at least one electrophile and a nucleophilic polymer which is then further reacted with an acylating agent, wherein the organic group is attached by reacting a diazonium salt having the electrophile with at least one type of pigment and wherein the electrophile is selected from the group consisting of:
- acyl azides, isocyanates, ketones, aldehydes, anhydrides, amides, imides, imines, α,β-unsaturated ketones and aldehydes, alkyl halides, epoxides, alkyl sulfonates and sulfates, aromatic compounds which undergo addition-elimination reactions, and salts and derivatives thereof.
Dependencies are inferred from the claim text.