Electrophotographic toner and production process thereof

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

1993-01-29

1994-12-06

Goodrow, John

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

430137, G03G 9087

Patent

active

053709586

ABSTRACT:
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.degree.-75.degree. 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, offset 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.

REFERENCES:
patent: 3938992 (1976-02-01), Jadwin et al.
patent: 4504563 (1985-03-01), Tanaka et al.
patent: 5147750 (1992-09-01), Nakanishi
patent: 5241019 (1993-08-01), Otsuki et al.

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