Conductive developer compositions with surface additives
AssigneeXerox Corporation
InventorsRobert J. Nash, Cheryl A. Hanzlik, Richard N. Muller, Richard J. Hodgson
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Abstract
A developer composition comprised of negatively charged toner particles comprised of crosslinked polyester resin particles, pigment particles, and a surface additive mixture comprised of metal salts of fatty acids in an amount of from about 0.2 to about 0.5 weight percent, metal oxide particles in an amount of from about 0.3 to about 1 weight percent, and silica particles in an amount of from about 0.2 to about 0.5 weight percent; and carrier particles comprised of a core with a coating thereover containing a conductive component.
Claims29
A developer composition consisting essentially of negatively charged toner particles consisting essentially of crosslinked polyester resin particles, pigment particles, and a surface additive mixture comprised of metal salts of fatty acids in an amount of from about 0.2 to about 0.5 weight percent, metal oxide particles in an amount of from about 0.3 to about 1 weight percent, and nonmetallized silica particles in an amount of from about 0.2 to about 0.5 weight percent;
- and carrier particles comprised of a core with a coating thereover containing a conductive component.
A developer composition comprised of negatively charged toner particles comprised of crosslinked polyester resin particles, carbon pigment particles, and a surface additive mixture comprised of metal salts of fatty acids in an amount of from about 0.3 to about 0.4 weight percent, titanium oxide particles in an amount of from about 0.3 to about 1 weight percent, and nonmetallized fumed silica particles in an amount of from about 0.3 to about 0.4 weight percent, and carrier particles comprised of a core with a polymer coating thereover containing a conductive component.
A developer composition comprised of negatively charged toner particles comprised of crosslinked polyester resin particles, carbon black pigment particles in an amount of from about 4 to about 8 weight percent, and a surface additive mixture comprised of zinc stearate in an amount of from about 0.3 to about 0.4 weight percent, nonmetallized silica particles in an amount of from about 0.3 to about 0.4 weight percent, and titanium oxide particles present in an amount of form about 0.7 to about 1 weight percent, and carrier particles comprised of a core with a polymethylmethacrylate polymer coating thereover containing a carbon black conductive component.
A developer composition consisting of negatively charged toner particles consisting of crosslinked polyester resin particles, carbon black pigment particles, and a surface additive mixture consisting of metal salts of fatty acids in an amount of from about 0.3 to about 0.4 weight percent, titanium oxide particles in an amount of from about 0.3 to about 1 weight percent, and nonmetallized fumed silica particles in an amount of from about 0.3 to about 0.4 weight percent;
- and carrier particles comprised of a core with a polymer coating containing therein a conductive component, which conductive component is present in an amount of from about 20 to about 50 weight percent.
A developer composition consisting of negatively charged toner particles consisting of crosslinked polyester resin particles, pigment particles, and a surface additive mixture comprised of metal salts of fatty acids in an amount of from about 0.2 to about 0.5 weight percent, metal oxide particles in an amount of from about 0.3 to about 1 weight percent, and silica particles in an amount of from about 0.2 to about 0.5 weight percent;
- and carrier particles comprised of a core with a coating thereover containing a conductive component.
Dependencies are inferred from the claim text.