EMULSION AGGREGATION POLYESTER TONERS
First Claim
1. An emulsion aggregation polyester toner comprised of an amorphous resin and a crystalline resin, wherein the toner has an acid value of from about 16 mg/eq. KOH to about 40 mg/eq. KOH, wherein the toner has a melting point of from about 50°
- C. to about 130°
C.
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Accused Products
Abstract
An emulsion aggregation toner including an amorphous resin and a crystalline resin, wherein the toner has an acid value of from about 16 mg/eq. KOH to about 40 mg/eq. KOH and a relative humidity sensitivity ratio of from about 1 to about 2, and wherein the crystalline resin has a melting point of at least about 60° C. The process for forming particles including generating an emulsion of a polyester resin having an acid value of from about 16 mg/eq. KOH to about 40 mg/eq. KOH and generating aggregate particles from the emulsion. Increased charge maintainability and resistivity of the toner result, thereby generating high print quality and high gloss, and provide stable xerographic charging in all ambient environments.
150 Citations
22 Claims
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1. An emulsion aggregation polyester toner comprised of an amorphous resin and a crystalline resin, wherein the toner has an acid value of from about 16 mg/eq. KOH to about 40 mg/eq. KOH, wherein the toner has a melting point of from about 50°
- C. to about 130°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- C. to about 130°
-
9. A process for forming particles, comprising
generating an emulsion of a polyester resin having an acid value of from about 16 mg/eq. KOH to about 40 mg/eq. KOH; - and
generating aggregate particles from the emulsion. - View Dependent Claims (10, 11, 12, 13, 14, 15)
- and
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16. A process for forming particles, comprising
forming a latex by generating an emulsion of a polyester resin initially having an acid value of from about 16 mg/eq. KOH to 40 mg/eq. KOH; -
optionally adding thereto a colorant dispersion, a wax dispersion, and/or a surfactant; shearing and adding an aqueous solution of acid until the pH of the mixture is from about 3 to about 5.5, followed by optionally adding an aqueous solution of coagulant; heating to temperature of from about 30°
C. to about 60°
C., wherein the aggregate grows to a size of from about 3 to about 20 microns;raising the pH of the mixture to a range of 7 to about 9; heating the mixture to about 60°
C. to about 95°
C.; andoptionally decreasing the pH to a range of about 6.0 to about 6.8. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification