Electrophotographic toner containing a vinyl resin and process f

Details Electrophotographic toner containing a vinyl resin and process f Electrophotographic toner containing a vinyl resin and process f

1992-07-23

1995-05-16

McCamish, Marion E.

Radiation imagery chemistry: process, composition, or product th

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

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

430111, G03G 900

Patent

active

054159652

ABSTRACT:
An electrophotographic toner is disclosed which comprises a colorant and a binder resin, in which the binder resin is present as a vinyl resin whose gel content ranges from 15 to 25% by weight and whose tetrahydrofuran-soluble content has a number-average molecular weight (Mn) ranging from 5,000 to 12,000, a weight-average molecular weight (Mw) ranging from 10.times.10.sup.4 to 40.times.10.sup.4 and a higher Mw peak in the range of from 9.times.10.sup.5 to 18.times.10.sup.5. The toner exhibits improved chargeability and improved powder fluidity as well as improved fixing properties and improved offset resistance. A process for producing the toner is also disclosed.

REFERENCES:
patent: 4504563 (1985-03-01), Tanaka et al.
patent: 4626488 (1986-12-01), Inoue
patent: 4900647 (1990-02-01), Hikake et al.
patent: 5185405 (1993-02-01), Nishida
patent: 5266434 (1993-11-01), Hirayama et al.
patent: 5268248 (1993-12-01), Tanikawa et al.

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