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US 2015/0362851 A1Published application
Electrophotographic toner using bioplastic and production method thereof
AssigneeCasio Computer Co., Ltd.
InventorsKenji KIHIRA, Hideki IKEDA, Yuichiro IEGAKI, Yuta KAN, Hideki HASEGAWA
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Abstract
An electrophotographic toner which is excellent in grindability, fixing property and durability by being obtained via a step of melt-kneading a mixture containing an amorphous bioplastic having a weight-average molecular weight (Mw) of 55000 to 120000, a terpene phenol resin, and a styrene acrylic resin having a weight-average molecular weight (Mw) of 85500 to 118000 so as to obtain a kneaded mixture, and a step of grinding the kneaded mixture after hardening.
Claims7
An electrophotographic toner comprising:
- an amorphous bioplastic having a weight-average molecular weight (Mw) of 55000 to 120000, a terpene phenol resin, and a styrene acrylic resin having a weight-average molecular weight (Mw) of 85500 to 118000.
A method of producing an electrophotographic toner, comprising:
- a step of melt-kneading a mixture containing an amorphous bioplastic having a weight-average molecular weight (Mw) of 55000 to 120000, a terpene phenol resin, and a styrene acrylic resin having a weight-average molecular weight (Mw) of 85500 to 118000, so as to obtain a kneaded mixture;
- and
- a step of grinding the kneaded mixture after hardening.
Dependencies are inferred from the claim text.