BINDER RESIN COMPOSITION FOR TONER

To provide a binder resin composition for toner that has sufficiently low temperature fixability and hot offset resistance while having excellent scratch resistance and bending resistance, a method for producing the binder resin composition, and toner for electrophotography containing the binder res...

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1. Verfasser: KAMIYOSHI NOBUMICHI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide a binder resin composition for toner that has sufficiently low temperature fixability and hot offset resistance while having excellent scratch resistance and bending resistance, a method for producing the binder resin composition, and toner for electrophotography containing the binder resin composition.SOLUTION: A binder resin composition for toner contains a polyester resin (A) with a softening point of 120°C or higher and 150°C or lower. The polyester resin (A) is a polycondensate of at least one starting monomer having a valence of three or more selected from an alkylene oxide adduct of bisphenol A, an aromatic dicarboxylic acid compound, an alcohol having a valence of three or more, and a carboxylic acid compound having a valence of three or more, and a starting monomer (a) containing an amine polymer compound.SELECTED DRAWING: None 【課題】優れた低温定着性及び耐ホットオフセット性を有しつつ、耐擦過性及び耐折り曲げ性に優れるトナー用結着樹脂組成物、当該結着樹脂組成物の製造方法、及び当該結着樹脂組成物を含有する電子写真用トナー等に関する。【解決手段】軟化点が120℃以上150℃以下であるポリエステル系樹脂(A)を含有するトナー用結着樹脂組成物であり、該ポリエステル系樹脂(A)が、ビスフェノールAのアルキレンオキシド付加物、芳香族ジカルボン酸化合物、3価以上のアルコール及び3価以上のカルボン酸化合物から選ばれる少なくとも1種の3価以上の原料モノマー、及びアミン系高分子化合物を含む原料モノマー(a)の重縮合物である、トナー用結着樹脂組成物。【選択図】なし