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US 8,771,411 B2Granted
Modified pigments
AssigneeCabot Corporation
InventorAlexander I. Shakhnovich
Life of this patent
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Abstract
Modified pigments including an organic group containing a 5-membered heteroaromatic ring, as well as related compositions, articles, and methods, are disclosed. The diazonium salts containing a 5-membered heteroaromatic ring exhibit enhanced activity in modifying pigments, thereby resulting in modified pigments with a higher treatment level and improved dispersibility in an ink composition.
Claims10
A method, comprising:
- reacting a pigment with a diazonium salt comprising a 5-membered heteroaromatic ring and a diazonium group directly bonded to the 5-membered heteroaromatic ring, thereby forming a modified pigment that comprises the 5-membered heteroaromatic ring;
- wherein the 5-membered heteroaromatic ring comprises three ring heteroatoms, at least two of which are nitrogen atoms, and
- wherein the diazonium salt comprises 1,2,4-triazolyl, 1,2,3-triazolyl, 1,3,4-thiadiazolyl, 1,2,4-thiadiazolyl, 1,2,3-thiadiazolyl, 1,2,5-thiadiazolyl, 1,3,4-oxadiazolyl, 1,2,4-oxadiazolyl, 1,2,3-oxadiazolyl, or 1,2,5-oxadiazolyl or a compound of formula:
A method, comprising:
- reacting a pigment with a diazonium salt comprising a 5-membered heteroaromatic ring, thereby forming a modified pigment that comprises the 5-membered heteroaromatic ring;
- wherein the diazonium salt comprises a cation of formula:
An ink composition, comprising:
- a liquid vehicle;
- and
- a material comprising a pigment and an organic group bonded to the pigment, the organic group comprising only one aromatic ring and the only one aromatic ring being a 5-membered heteroaromatic ring;
- wherein the 5-membered heteroaromatic ring comprises three ring heteroatoms, at least two of which are nitrogen atoms, and
- wherein the organic group comprises 1,2,4-triazolyl, 1,2,3-triazolyl, 1,3,4-thiadiazolyl, 1,2,4-thiadiazolyl, 1,2,3-thiadiazolyl, 1,2,5-thiadiazolyl, 1,3,4-oxadiazolyl, 1,2,4-oxadiazolyl, 1,2,3-oxadiazolyl, or 1,2,5-oxadiazolyl or a compound of formula:
2 more elements
A composition, comprising:
- a pigment;
- and
- an organic group bonded to the pigment, the organic group comprising only one aromatic ring and the only one aromatic ring being a 5-membered heteroaromatic ring;
- wherein the 5-membered heteroaromatic ring comprises three ring heteroatoms, at least two of which are nitrogen atoms, and
- wherein the organic group comprises 1,2,4-triazolyl, 1,2,3-triazolyl, 1,3,4-thiadiazolyl, 1,2,4-thiadiazolyl, 1,2,3-thiadiazolyl, 1,2,5-thiadiazolyl, 1,3,4-oxadiazolyl, 1,2,4-oxadiazolyl, 1,2,3-oxadiazolyl, or 1,2,5-oxadiazolyl or a compound of formula
2 more elements
An ink composition, comprising:
- a liquid vehicle;
- and
- a material comprising a pigment and an organic group bonded to the pigment;
- wherein the organic group is
1 more element
A composition, comprising:
- a pigment;
- and
- an organic group bonded to the pigment, the organic group being of formula
Dependencies are inferred from the claim text.