Modified emulsion aggregation processes
AssigneeXerox Corporation
InventorsRaj D. Patel, Marcel P. Breton, Michael A. Hopper, Grazyna E. Kmiecik-Lawrynowicz, Beng S. Ong
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Abstract
A process for the preparation of ink compositions comprising the emulsion polymerization of monomer, water, surfactant, and initiator with stirring and heating to provide a latex; mixing therewith a pigment dispersion of pigment particles, water, and cationic surfactant; blending the mixture; thereafter stirring the mixture; and subsequently adding additional anionic surfactant to stabilize the aggregate particles.
Claims33
A process for the preparation of ink compositions consisting essentially of in the following order the emulsion polymerization of monomer, water, surfactant, and initiator with stirring and heating to provide a latex;
- mixing therewith a pigment dispersion of pigment particles, water, and cationic surfactant;
- blending the mixture;
- thereafter stirring the mixture;
- and subsequently adding anionic surfactant to stabilize the aggregate particles, and wherein said cationic surfactant is selected in an amount of from about 0.1 weight percent to about 0.75 weight percent, and wherein said ink compositions contain a polymer formed by the emulsion polymerization of said monomer and pigment.
A process for the preparation of ink compositions consisting of accomplishing in the following order the emulsion polymerization of monomer, water, surfactant, and initiator with stirring and heating to provide a latex;
- mixing therewith a pigment dispersion of pigment particles, water, and cationic surfactant, blending the mixture;
- thereafter stirring the mixture;
- and subsequently adding anionic surfactant to stabilize the aggregate particles, and wherein the molar ratio of cationic surfactant to anionic surfactant is from 0.5 to 1.5, and wherein the latex in an amount of from about 10 to about 25 weight percent is mixed with the pigment dispersion of pigment particles, and which dispersion is selected in an amount of from about 1 to about 10 weight percent, water, and cationic surfactant;
- blending the mixture resulting for a period of 1 to 30 minutes;
- thereafter stirring the mixture at a speed in the range of 100 to 300 rpm for a period of 5 to 30 minutes;
- and subsequently adding extra anionic surfactant in the range of 2 to 10 percent to stabilize the aggregate particles.
A process for the preparation of ink compositions consisting essentially of accomplishing in the following order the emulsion polymerization of monomer, water, surfactant, and initiator with stirring and heating to provide a latex;
- mixing therewith a pigment dispersion of pigment particles, water, and cationic surfactant;
- blending the mixture;
- thereafter stirring the mixture;
- and subsequently adding anionic surfactant to stabilize the aggregate particles, and wherein the molar ratio of cationic to anionic surfactant is from 0.5 to 1.5, and wherein said ink compositions contain a polymer and pigment.
A process for the preparation of ink compositions consisting of in the following order the emulsion polymerization of monomer, water, surfactant, and initiator with stirring and heating to provide a latex;
- mixing therewith a pigment dispersion of pigment particles, water, and cationic surfactant;
- blending the mixture;
- thereafter stirring the mixture;
- and subsequently adding additional anionic surfactant to stabilize the aggregate particles, and wherein said cationic surfactant is selected in an amount of from about 0.1 weight percent to about 0.75 weight percent, and wherein said ink compositions contain a polymer and pigment.
Dependencies are inferred from the claim text.