Electrophotographic toner and production process thereof

Details Electrophotographic toner and production process thereof Electrophotographic toner and production process thereof

G - Physics

03

G

G03G 9/08 (2006.01) G03G 9/087 (2006.01)

Patent

CA 2088093

An object of the present invention is to provide an electrophotographic toner for high-speed copying machines having a high hot-roll speed and capable of fixing a toner at lower temperatures. The toner according to the present invention comprises a vinyl resin which has a wide molecular-weight distribution (Mn:1,000-20,000, Mw: 50,000-2,000,000), a glass transition temperature (Tg) of 40-75°C and a low acid value (AV:1-10); and a glycidyl compound in an amount sufficient to provide 0.05-1.0 equivalent of glycidyl groups per equivalent of COOH groups in the vinyl resin. It assures well-balanced fixing property, off-set resistance and blocking resistance. In particular, it exhibits a remarkable effect in improving offset resistance and also in grindability during the production of the toner.

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