Toner compositions comprising polyester resin and polypyrrole

A toner comprising particles of a polyester resin, on optional colorant, and polypyrrole, wherein said toner particles are prepared by an emulsion aggregation process, wherein the toner particles comprise a core comprising the polyester resin and optional colorant, said core having a surface, and, coated on the core, a coating comprising the polypyrrole, wherein the polyester resin is a sulfonated polyester resin, and wherein the sulfonated polyester resin anchors the polypyrrole to the core surface.

A toner comprising particles of a polyester resin, an optional colorant, and polypyrrole, wherein said toner particles are prepared by an emulsion aggregation process, wherein the toner particles comprise a core comprising the polyester resin and optional colorant and, coated on the core, a coating comprising the polypyrrole, wherein the polyester resin is a sulfonated polyester, and wherein the sulfonated polyester resin acts as a dopant for the polypyrrole.

A toner comprising particles of a polyester resin, an optional colorant, and polypyrrole, wherein said toner particles are prepared by an emulsion aggregation process, wherein the emulsion aggregation process comprises (1) shearing a first ionic surfactant with a latex mixture comprises (a) a counterionic surfactant with a charge polarity of opposite sign to that of said first ionic surfactant, (b) a nonionic surfactant and (c) the polyester resin, thereby causing flocculation or heterocoagulation of formed particles of resin to form electrostatically bound aggregates;

• and (2) heating the electrostatically bound aggregates to form aggregates of at least about 1 micron in average particle diameter, wherein the toner particles comprise a core comprising the polyester resin and optional colorant, said core having a surface, and, coated on the core, a coating comprising the polypyrrole, wherein the ionic surfactant has a sulfonate group thereon, wherein the ionic surfactant remains on the core surface, and wherein the ionic surfactant acts as a dopant for the polypyrrole.

A toner comprising particles of a polyester resin, a colorant, and polypyrrole, wherein said toner particles are prepared by an emulsion aggregation process, wherein the emulsion aggregation process comprises (1) preparing a colorant dispersion in a solvent, which dispersion comprises the colorant and a first ionic surfactant;

• (2) shearing the colorant dispersion with a latex mixture comprising (a) a counterionic surfactant with a charge polarity of opposite sign to that of said first ionic surfactant, (b) a nonionic surfactant, and (c) the polyester resin, thereby causing flocculation or heterocoagulation of formed particles of colorant and resin to form electrostatically bound aggregates:
• and (3) heating the electrostatically bound aggregates to form aggregates of at least about 1 micron in overage particle diameter, wherein the toner particles comprise a core comprising the polyester resin and colorant, said core having a surface, and, coated on the core, a coating comprising the polypyrrole, wherein the ionic surfactant has a sulfonate group thereon, wherein the ionic surfactant remains on the core surface, and wherein the ionic surfactant acts as a dopant for the polypyrrole.

A toner comprising particles of a polyester resin, an optional colorant, and polypyrrole, wherein said toner particles are prepared by an emulsion aggregation process, wherein the emulsion aggregation process comprises (1) shearing an Ionic surfactant with a latex mixture comprising (a) a flocculating agent, (b) a nonionic surfactant, and (c) the polyester resin, thereby cousins flocculation or heterocoagulation of formed particles of resin to form electrostatically bound aggregates;

• and (2) heating the electrostatically bound aggregates to form aggregates of at least about 1 micron in average particle diameter, wherein the toner particles comprise a core comprising the polyester resin and optional colorant, said core having a surface, and, coated on the core, a coating comprising the polypyrrole, wherein the ionic surfactant has a sulfonate group thereon, wherein the ionic surfactant remains on the core surface, and wherein the ionic surfactant acts as a dopant for the polypyrrole.

A toner comprising particles of a polyester resin, a colorant and polypyrrole, wherein said toner particles are prepared by an emulsion aggregation process, wherein the emulsion aggregation process comprises (1) preparing a colorant dispersion in a solvent, which dispersion comprises the colorant and an ionic surfactant;

• (2) shearing the colorant dispersion with a latex mixture comprising (a) a flocculating agent, (b) a nonionic surfactant, and (c) the polyester resin, thereby causing flocculation or heterocoagulation of formed particles of colorant and resin to form electrostatically bound aggregates;
• and (3) heating the electrostatically bound aggregates to form aggregates of at least about 1 micron in average particle diameter, wherein the toner particles comprise a core comprising the polyester resin and colorant, said core having a surface, and, coated on the core, a coating comprising the polypyrrole, wherein the ionic surfactant has a sulfonate group thereon, wherein the ionic surfactant remains on the core surface, and wherein the ionic surfactant acts as a dopant for the polypyrrole.