Ink composition and method of preparing same
AssigneeHewlett-Packard Development Company, L.P.
InventorsDoris Pik-Yiu Chun, Hou T. Ng
Life of this patent
Estimating the term…
Abstract
An ink composition includes a particulate pigment, a hydrocarbon vehicle, an organic polyamine and an organic polyacid. A ratio by weight percent of the organic polyamine to the organic polyacid in the hydrocarbon vehicle is sufficient to render a conductivity of the ink composition to equal to or less than 15 nanosiemens per centimeter. The ink composition is prepared by combining the particulate pigment with a composition that includes the hydrocarbon vehicle, the organic polyamine and the organic polyacid. The combination is subjected to conditions under which the particulate pigment becomes dispersed in the composition.
Claims17
An ink composition comprising:
- (a) a particulate pigment,
- (b) a hydrocarbon vehicle,
- (c) an organic polyamine, and
- (d) an organic polyacid,
- wherein a ratio of a weight percent of the organic polyamine to a weight percent of the organic polyacid in the hydrocarbon vehicle is sufficient to render a conductivity of the ink composition to less than or equal to 15 nanosiemens per centimeter.
A method for preparing an ink composition, the method comprising:
- (a) combining a particulate pigment with a composition comprising a hydrocarbon vehicle, an organic polyamine, and an organic polyacid, wherein a ratio by weight percent of the organic polyamine to the organic polyacid in the hydrocarbon vehicle is sufficient to render a conductivity of the ink composition to less than or equal to 15 nanosiemens per centimeter;
- and
- (b) subjecting the combination to conditions under which the particulate pigment is dispersed in the composition.
An ink composition comprising:
- (a) a particulate pigment;
- (b) an isoparaffinic hydrocarbon vehicle;
- (c) an organic polyamine comprising an unsaturated polymeric fatty acid backbone and one or more amine-containing groups;
- and
- (d) a poly(12-hydroxystearic acid),
- wherein a ratio of a weight percent of the organic polyamine to a weight percent of the poly(12-hydroxystearic acid) in the isoparaffinic hydrocarbon vehicle is sufficient to render a conductivity of the ink composition to less than or equal to 15 nanosiemens per centimeter.
Dependencies are inferred from the claim text.