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US 5,702,859 AGranted
Electrophotographic toner and process for the production thereof
AssigneeTomoegawa Paper Co., Ltd.
InventorHideyuki Kubota
Life of this patent
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AssigneeTomoegawa Paper Co., Ltd.
InventorHideyuki Kubota
Estimating the term…
An electrophotographic toner which can be fixed at a low fixing temperature, causes no practical problem on offsetting-free properties and has excellent fixing strength to a transfer sheet, and a process for the production thereof, the toner containing a binder resin and a colorant as main components and further containing a Fischer-Tropsch wax formed from natural gas and/or a Fischer-Tropsch wax formed from coal and having a melt viscosity, measured at 110.degree. C., of 1.times.10.sup.5 to 1.times.10.sup.6 poise, the process comprising solution-polymrerizing, suspension-polymerizing or emulsion-polymerizing a vinyl-containing monomer in which the Fischer-Tropsch wax formed from natural gas and/or a Fischer-Tropsch wax formed from coal are/is dissolved in advance, to prepare the binder resin.
An electrophotographic toner containing a binder resin and a colorant as main components, the toner further containing a Fischer-Tropsch wax formed from natural gas and having a melting point, measured with a differential scanning calorimeter, of 85.degree. to 100.degree. C.
An electrophotographic toner containing a binder resin and a colorant as main components, the toner further containing a Fischer-Tropsch wax formed from natural gas and having a melt viscosity, measured at 110.degree. C., of 1.times.10.sup.5 to 1.times.10.sup.6 poise.
An electrophotographic toner containing a binder resin and a colorant as main components, the toner containing a Fischer-Tropsch wax formed from natural gas, the binder resin being a styrene/(meth)acrylate copolymer, the toner showing two maximal values when measured by GPC, one maximal value being at least 8.times.10.sup.5, the other being in the range of from 3,000 to 10,000.
An electrophotographic toner containing a binder resin and a colorant as main components, the binder resin containing a vinyl-containing copolymer formed by polymerization in the presence of a Fischer-Tropsch wax formed from natural gas.
Dependencies are inferred from the claim text.