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US 7,604,915 B2Granted
Toner compositions having magenta pigment
AssigneeXerox Corporation
InventorsJoo T. Chung, Scott M. Silence, Julia Kohlmeier, John Ianni
Life of this patent
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Abstract
Use of a charge control agent in a toner, such as a magenta toner, to give an increased triboelectric charge is disclosed. The magenta toner may contain a magenta resin, such as xanthene. The charge control agent is a styrene-acrylate polymer, such as the following polymer of Formula II:
Claims22
A toner comprising:
- resin;
- magenta pigment;
- and
- an internal charge control agent having the formula:
1 more element
A toner comprising:
- resin;
- magenta pigment, wherein the magenta pigment is a xanthene pigment;
- and
- an internal charge control agent having the formula:
- wherein the triboelectric charge of the toner is at least about 10 μC/g when the toner environment has a relative humidity of about 10% or more at about 70° F.
2 more elements
A method of making a toner comprising admixing resin, magenta pigment, and an internal charge control agent having the formula:
- grinding the mixture;
- and
- classifying the ground mixture.
Dependencies are inferred from the claim text.