Electrophotographic toner
An electrophotographic and toner technology, applied in electrographics, optics, instruments, etc., can solve the problems of image quality stability, suppress the change of image quality concentration without touching, and be appropriate without any disclosure or description, and achieve stable charging. Excellent performance, widened fixing temperature range, and the effect of preventing low temperature excursions
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Embodiment 1
[0102] ・Polyester resin (acid value: 21mgKOH / g)
[0103] Aromatic alcohol components: PO-BPA and EP-BPA
[0104] Acid component: 87.5% by weight of fumaric acid and mellitic anhydride
[0105] · C.I. Pigment Blue 15:1 5% by weight
[0106] ·Non-polar paraffin (DSP peak 78°C, Mw8.32×10 2 6% by weight
[0107] ・Electrification control agent (volume average particle diameter produced in the above production example is 2 μm)
[0108] 1.5% by weight
[0109] Mw of the above-mentioned nonpolar paraffin is known to represent a weight average molecular weight.
[0110] The above constituent materials were premixed with a Henschel mixer, and then melted and stirred in a biaxial extrusion mixer. The kneaded mixture was coarsely pulverized by a cutter, finely pulverized by a jet mill, and then classified by an air classifier to obtain a toner having an average particle diameter of 6.5 μm. Then, 1.0 parts by weight of silica...
Embodiment 2
[0112] Except that the acid value of the polyester resin was changed to 5 mgKOH / g as shown in Table 1, a toner was produced in the same manner as in Example 1.
Embodiment 3
[0114] Except that the acid value of the polyester resin was changed to 28 mgKOH / g as shown in Table 1, the procedure was the same as in Example 1 to prepare a toner.
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