IP Library Granted Patent US 9,366,983
Granted Patent B2
US 9,366,983 · App. 14/208,433 · Granted Jun 14, 2016

Decolorizable toner

Inventors: Takafumi Hara (Shizuoka-ken, JP); Masahiro Ikuta (Shizuoka-ken, JP); Tsuyoshi Itou (Shizuoka-ken, JP); Motonari Udo (Shizuoka-ken, JP); Kazuhisa Takeda (Shizuoka-ken, JP)
Assignee: TOSHIBA TEC KABUSHIKI KAISHA
G03G9/09371G03G9/09328G03G9/09378G03G9/09385G03G9/09392
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Quick Facts
Patent No.
US 9,366,983
App. No.
14/208,433
Granted
Jun 14, 2016
Kind
B2
Abstract

Provided is a decolorizable toner including a binder resin and colorant particles which contain a color developable compound, a color developing agent, and a decolorizing agent, and have a capsule structure coated with an outer shell, wherein the binder resin is contained in an amount of 60 to 80% by mass with respect to the total amount of the toner components.

Claims (10)

1. A decolorizable toner, comprising:

colorant particles which contain a color developable compound, a color developing agent, and a decolorizing agent, and have a capsule structure coated with an outer shell;

release agent particles; and

a polyester binder resin which is contained in an amount of 60 to 80% by mass with respect to the total amount of components to be contained in the toner particles, wherein the components comprise the colorant particles, the release agent particles and the binder resin,

wherein the toner is produced by mixing a dispersion of the colorant particles and a dispersion of the release agent particles to form a dispersion of the colorant particles and the release agent particles, aggregating the colorant particles and the release agent particles to produce a dispersion of first aggregates, mixing a dispersion of resin particles containing the polyester binder resin and the dispersion of the first aggregates, and aggregating the first aggregates and the resin particles to coat the first aggregates with the resin particles, thereby producing second aggregates, and fusing the second aggregates to obtain the toner,

wherein the colorant particles are contained in an amount of 10% by mass or more with respect to the total amount of the components to be contained in the toner.

2. The toner according to claim 1 , wherein the binder resin is contained in an amount of 60 to 70% by mass with respect to the total amount of the components to be contained in the toner particles.

3. The toner according to claim 1 , wherein the colorant particles are contained in an amount of 15% by mass or more with respect to the total amount of the components to be contained in the toner particles.

4. The toner according to claim 1 , wherein the release agent particles are contained in an amount of 10% by mass or more with respect to the total amount of the components to be contained in the toner particles.

5. The toner according to claim 1 , wherein the binder resin has a glass transition temperature of 54° C. or higher.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 13, 2014
From: HARA, TAKAFUMI; IKUTA, MASAHIRO; ITOU, TSUYOSHI; UDO, MOTONARI; TAKEDA, KAZUHISA
To: TOSHIBA TEC KABUSHIKI KAISHA
Reel/Frame 032428/0693 →
Continuity (4)
Continuation In Part 13664704 · Oct 31, 2012
Provisional Application 61564087 · Nov 28, 2011
Provisional Application 61788626 · Mar 15, 2013
Related Publication 20140212805A1 · Jul 31, 2014