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US 6,641,656 B2Granted
Dispersions comprising modified pigments
AssigneeCabot Corporation
InventorsYuan Yu, Paul S. Palumbo
Life of this patent
Estimating the term…
Abstract
The present invention describes a dispersion comprising a vehicle and a modified pigment. The modified pigment has, when measured in an aqueous medium, a zeta potential of 0.0 mV at a pH of between 5.0 and 11.0. Inkjet ink compositions and an inkjet consumable set are also disclosed.
Claims34
A dispersion comprising:
- a) a vehicle;
- and b) a modified pigment comprising a pigment having attached at least two organic groups, wherein the modified pigment has, when measured in an aqueous medium, a zeta potential of 0.0 mV at a pH of between about 5.0 and about 11.0.
A dispersion comprising:
- a) a vehicle;
- and b) a modified pigment comprising a pigment having attached at least one organic group, wherein the organic group comprises at least one anionic or anionizable group and at least one cationic or cationizable group, and wherein the modified pigment has, when measured in an aqueous medium, a zeta potential of 0.0 mV at a pH of between about 5.0 and about 11.0.
An inkjet consumable set comprising:
- (i) a substrate having a surface pH of between about 4.0 and about 8.0;
- and
- (ii) an inkjet ink composition comprising:
- a) a liquid vehicle;
- and b) a modified pigment comprising a pigment having attached at least two organic groups, wherein the modified pigment has, when measured in an aqueous medium, a zeta potential of 0.0 mV at a pH of between about 4.0 and about 11.0.
2 more elements
An inkjet consumable set comprising:
- (i) a substrate having a surface pH of between about 4.0 and about 8.0;
- and
- (ii) an inkjet ink composition comprising:
- a) a liquid vehicle;
- and b) a modified pigment comprising a pigment having attached at least one organic group, wherein the organic group comprises an anionic or anionizable group and a cationic or cationizable group, and wherein the modified pigment has, when measured in an aqueous medium, a zeta potential of 0.0 mV at a pH of between about 4.0 and about 11.0.
2 more elements
Dependencies are inferred from the claim text.