Oblon, McClelland, Maier & Neustadt, L.L.P.
Method for producing toner for electrophotography
The present invention relates to a process for producing a toner for electrophotography that is excellent in the low-temperature fusing property, the initial image quality after storage, and the document offset property. A process for producing a toner for electrophotography, including step 1: melt-mixing a mixture containing a crystalline resin (C) and ester wax (W) having a dipentaerythritol unit as a constitutional component, wherein a difference |Cmp−Wmp| between a melting point Cmp of the crystalline resin (C) and a melting point Wmp of the ester wax (W) is 30° C. or less, and the melt-mixing is performed at a temperature Kt that is the melting point Cmp or more and the melting point Wmp or more.
KAO CORPORATION
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Kotaro Shogo Arisa
Shimada Watanabe Yamamoto