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US 5,665,510 AGranted
Toner for electrophotograph and process for the production thereof
AssigneeTomoegawa Paper Co., Ltd.
InventorKazuyoshi Hattori
Life of this patent
Estimating the term…
Abstract
A toner for electrophotography, which contains a binder resin having a low softening point so that the toner can be fixed at a low temperature, and which is free from blocking, the toner comprising toner matrix particles containing a binder resin containing a resin having an epoxy group, and a colorant, and a cured coating formed from the resin having an epoxy group in the presence of a curing agent, the toner matrix particles being surface-covered with the cured coating.
Claims7
A toner for electrophotography produced by the process which consists essentially of
- mixing toner matrix particles containing a binder resin having an epoxy group and a colorant with a curing agent to form a mixture,
- heat-treating said mixture or applying a mechanical impact force on the mixture to thereby form a cured coating of the resin having an epoxy group and the curing agent on the surface of each of the toner matrix particles.
Dependencies are inferred from the claim text.