Electrophotographic toner, electrophotographic developer, and im

Details Electrophotographic toner, electrophotographic developer, and im Electrophotographic toner, electrophotographic developer, and im

1998-11-03

2000-03-21

Martin, Roland

Radiation imagery chemistry: process, composition, or product th

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

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

430111, 430124, G06G 9097, G06G 9087

Patent

active

060401044

ABSTRACT:
An electrophotographic toner containing a binding resin and a coloring agent, wherein as the binding resin, a resin is included in which the minimum value of tan .delta. of the binding resin exists between the glass transition temperature (Tg) and a temperature at which the loss modulus (G") is 1.times.10.sup.4 Pa, the minimum value of tan .delta. is less than 1.2, the storage modulus (G') at a temperature wherein tan .delta. is minimum is 5.times.10.sup.5 Pa or more, and the value of tan .delta. is 3.0 or more at a temperature wherein G"=1.times.10.sup.4 Pa. Further, a vinyl-based resin can be added in a small amount to the polyester resin having these features to provide a mixture to be used. Further, image formation is conducted using a transfer material in which the same resin is also used in an image-receiving layer. By this, an electrophotographic toner which has the same oil-less fixing property as that for monochrome tone fixing, can conduct fixing without using a releasing agent or using a releasing agent coated at an extremely small amount, provide high image quality and high color developing properties, and has high reliability, and an image forming method using the toner are provided.

REFERENCES:
patent: 5256507 (1993-10-01), Aslam et al.
patent: 5258256 (1993-11-01), Aslam et al.
patent: 5637433 (1997-06-01), Uchida et al.
patent: 5707771 (1998-01-01), Matsunaga

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