Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yosuke Iwasaki0
Ryuichiro Matsuo0
Takeshi Ohtsu0
Wakiko Katsumata0
Yuichi Mizo0
Kenta Mitsuiki0
Kentaro Kamae0
Koh Ishigami0
...
Date of Patent
September 24, 2019
Patent Application Number
16203864
Date Filed
November 29, 2018
Patent Citations
Patent Citations Received
...
Patent Primary Examiner
Patent abstract
Provided is a magenta toner having a magenta toner particle containing a binder resin, a colorant, a wax, a wax dispersant, and a crystalline polyester, wherein the wax dispersant is a graft polymer in which a styrene acrylic resin is grafted to a hydrocarbon compound, and the styrene acrylic resin has a monomer unit having a saturated alicyclic group, the colorant contains C.I. Pigment Red 32, and when observing a cross-section of the magenta toner particle using a transmission electron microscope (TEM), crystals of the crystalline polyester are dispersed in the cross-section, and the number average value of maximum lengths of the crystals is 50 nm or less.
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