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US 2010/0136472 A1Published application
Toner compositions
AssigneeXerox Corporation
InventorsMaria N.V. McDougall, Ke Zhou, Edward G. Zwartz, Daryl W. Vanbesien, John L. Pawlak, Paul J. Gerroir, Suxia Yang, Richard P.N. Veregin, Karen Ann Moffat
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Abstract
Toner particles are provided which may, in embodiments, include a high molecular weight branched or cross-linked polyester to decrease image gloss and to increase toner elasticity to prevent surface additives impaction. In embodiments, the toner particles may have a core-shell configuration, with the high molecular weight polyester in the core, the shell, or both.
Claims20
A toner comprising:
- at least one linear polyester;
- at least one crystalline polyester;
- and
- at least one high molecular weight polyester having a Mw greater than about 15,000 and a polydispersity index of greater than about 4,
- wherein the linear polyester and the high molecular weight polyester have a difference in solubility parameter of from about 0.1 to about 1.
2 more elements
A toner comprising:
- at least one linear polyester resin, at least one crystalline polyester resin, and one or more optional ingredients selected from the group consisting of colorants, optional waxes, and combinations thereof;
- and
- at least one high molecular weight polyester having a Mw of from about 20,000 to about 100,000, and a polydispersity index of from about 4 to about 100,
- wherein the linear polyester and the high molecular weight polyester have a difference in solubility parameter of from about 0.1 to about 1.
1 more element
A process comprising:
- contacting at least one linear resin with at least one crystalline polyester resin in an emulsion comprising at least one surfactant;
- contacting the emulsion with at least one high molecular weight polyester having a Mw greater than about 15,000 and a polydispersity index of greater than about 4, wherein the linear polyester and the high molecular weight polyester have a difference in solubility parameter of from about 0.1 to about 1, an optional colorant, and an optional wax;
- aggregating the small particles to form a plurality of larger aggregates;
- coalescing the larger aggregates to form particles;
- and
- recovering the particles.
3 more elements
Dependencies are inferred from the claim text.