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US 8,227,163 B2Granted
Coated carriers
AssigneeXerox Corporation
InventorsRichard P. N. Veregin, Daryl W. Vanbesien, Michael S. Hawkins, Corey L. Tracy
Life of this patent
Estimating the term…
Abstract
The present disclosure provides carriers for use with toner compositions. In embodiments, a carrier may include a core having a polymeric coating on at least a portion thereof. The polymer coating possesses cation binding groups. Processes for coating such carriers with the polymeric coatings are also provided.
Claims17
A carrier comprising:
- a magnetic core;
- and
- a polymeric coating over at least a portion of a surface of the core, the polymeric coating comprising a cation binding group comprising at least one cyclic structure selected from the croup consisting of crown ethers, cryptands, cyclens, porphin, meso-tetraphenyloorphyrin, tetratolylporphyrin, tetrabenzoporphyrin, tetraphenylporphyrin, orthophenyltetraazoporphyrin, and combinations thereof, wherein the polymeric coating comprises a polymer selected from the group consisting of acrylates and methacrylates, the polymeric coating has a carbon to oxygen ratio of from about 3:1 to about 8:1, and wherein the coated carrier has a resistivity of from about 108 ohm-cm to about 1013 ohm-cm at 500 volts.
A composition comprising:
- a toner comprising at least one resin and one or more optional ingredients selected from the group consisting of colorants, waxes, and combinations thereof;
- and
- a carrier comprising a magnetic core and a polymeric coating over at least a portion of a surface of the core, the polymeric coating comprising a cation binding group selected from the group consisting of crown ethers, cryptands, cyclens, porphin, meso-tetraphenylporphyrin, tetratolylporphyrin, tetrabenzoporphyrin, tetraphenylporphyrin, orthophenyltetraazoporphyrin, and combinations thereof, wherein the polymeric coating comprises a polymer selected from the group consisting of acrylates and methacrylates, the polymeric coating has a carbon to oxygen ratio of from about 3:1 to about 8:1, and wherein the coated carrier has a resistivity of from about 108 ohm-cm to about 1013 ohm-cm at 500 volts.
A composition comprising:
- a toner comprising at least one resin and at least one carrier, the carrier comprising a magnetic core and a polymeric coating over at least a portion of a surface of the core, the polymeric coating comprising at least one resin having a carbon to oxygen ratio of from about 3:1 to about 8:1, and possessing a cation binding group selected from the group consisting of crown ethers, cryptands, cyclens, porphin, porphyrins and combinations thereof,
- wherein the toner possess an A-zone charge from about −15 μC/g to about −80 μC/g and a C-zone charge from about −15 μC/g to about −80 μC/g,
- wherein the polymeric coating comprises a polymer selected from the group consisting of acrylates and methacrylates, the polymeric coating has a carbon to oxygen ratio of from about 3:1 to about 8:1, and wherein the coated carrier has a resistivity of from about 108 ohm-cm to about 1013 ohm-cm at 500 volts.
Dependencies are inferred from the claim text.