Ink process
AssigneeXerox Corporation
InventorsRaj D. Patel, Guerino G. Sacripante, Daniel A. Foucher
Life of this patent
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Abstract
A process for the preparation of inks comprised of i) flushing pigment into a sulfonated polyester resin, and which resin possesses a degree of sulfonation of from between about 2.5 and about 20 mol percent; ii) dispersing the pigmented polyester resin in water at a temperature of from about 40.degree. C. about 95.degree. C. by a polytron shearing device operating at speeds of from about 100 to about 5,000 revolutions to yield stable pigmented submicron sized particles of from about 5 to about 150 nanometers; and thereafter separating said submicron particles and mixing said submicron particles with water.
Claims19
A process for the preparation of inks consisting essentially of
- i) flushing pigment into a sulfonated polyester resin, and which resin possesses a degree of sulfonation of from between about 2.5 and about 20 mol percent;
- ii) dispersing the pigmented polyester resin in water at a temperature of from about 40.degree. C. to about 95.degree. C. by a polytron shearing device operating at speeds of from about 100 to about 5,000 revolutions per minute to yield stable pigmented submicron sized particles of from about 5 to about 150 nanometers;
- and thereafter separating said submicron particles and mixing said submicron particles with water.
A process for the preparation of ink compositions consisting essentially of flushing a pigment into a sulfonated polyester resin, and which resin possesses a degree of sulfonation of from about 2.5 to about 20 mol percent, and dispersing the pigmented polyester resin in warm water at a temperature of from about 40.degree. C. to about 95.degree. C.
A process in accordance with claim magnetite the pigment is magnetite, a cyan pigment, a yellow pigment, a magenta pigment, or mixtures thereof.
A process for the preparation of ink compositions comprised of water and a sulfonated polyester pigment mixture, and which process is comprised of
- i) flushing a pigment into a sulfonated polyester resin and which resin possesses a degree of sulfonation between about 2.6 and about 20 mol percent;
- ii) dispersing the pigmented polyester resin in water at a temperature of from about 40.degree. C. to about 95.degree. C. by a polytron shearing device to yield stable submicron sized particles, and separating said submicron particles therefrom, and thereafter dispersing said particles in water.
A process for the preparation of inks consisting essentially of
- i) flushing pigment into a sulfonated polyester resin, and which resin possesses a degree of sulfonation of from 2.5 to 20 mol percent;
- ii) dispersing the pigmented polyester resin in water, which water is at a temperature of from about 40.degree. C. to about 95.degree. C., and wherein dispersing is accomplished by a shearing device, thereby providing pigmented submicron sized particles of from about 5 to about 150 nanometers;
- separating said submicron particles, and mixing said particles with an ink vehicle.
A process for the preparation of inks consisting of
- i) flushing pigment into a sulfonated polyester resin, and which resin possesses a degree of sulfonation of from between about 2.5 and about 20 mol percent;
- ii) dispersing the pigmented polyester resin in water at a temperature of from about 40.degree. C. about 95.degree. C. by a polytron shearing device operating at speeds of from about 100 to about 5,000 revolutions per minute to yield stable pigmented submicron sized particles of from about 5 to about 150 nanometers;
- and thereafter separating aid submicron particles and mixing aid submicron particles with water.
Dependencies are inferred from the claim text.