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US 5,272,201 AGranted
Amine-containing block polymers for pigmented ink jet inks
AssigneeE. I. Du Pont de Nemours and Company
InventorsSheau-Hwa Ma, Walter R. Hertler, Harry J. Spineli, Arthur C. Shor
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Abstract
An aqueous ink jet ink composition having improved dispersion stability comprises an aqueous carrier medium, a pigment having a pH value below 7.0, and an AB block polymer consisting of an A block comprising a hydrophobic polymer having at least one basic amine functional groups, and a B block comprising a hydrophilic polymer selected from the group consisting of nonionic polymers and polymers containing acidic functional groups.
Claims18
An aqueous ink jet ink composition comprising:
- (a) an aqueous carrier medium;
- (b) a pigment having a pH below 7.0;
- and
- (c) an AB block polymer consisting of
- (1) an A block comprising a hydrophobic polymer having at least one basic amine functional group;
- and
- (2) a B block comprising a hydrophilic polymer selected from the group consisting of non-ionic polymers, and polymers containing acidic functional groups.
4 more elements
An aqueous ink jet ink composition comprising
- a) an aqueous carrier medium selected from the group consisting of water and a mixture of water and at least one water soluble organic solvent, said aqueous carrier medium being present in the range of from about 70% to about 99.89% by weight based on the total weight of the ink composition;
- b) a pigment having a pH value below 7.0;
- c) an AB block polymer consisting of
- (1) an A block comprising a hydrophobic polymer having at least one basic amine functional group;
- and
- (2) a B block comprising a hydrophilic polymer selected from the group consisting of non-ionic polymers, and polymers containing acidic functional groups, said AB block polymer being present in the range of from about 0.1% to about 30% by weight based on the total weight of the ink composition;
- and
- d) a surfactant;
- said ink jet ink having a viscosity in the range of about 1.0 to about 10.0 cP at 20.degree. C. and a surface tension in the range of about 30 to about 70 dyne/cm.
6 more elements
Dependencies are inferred from the claim text.