Toner for developing electrostatic image and image forming metho

Details Toner for developing electrostatic image and image forming metho Toner for developing electrostatic image and image forming metho

1994-12-02

1995-09-05

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 9083

Patent

active

054478138

ABSTRACT:
A toner for developing an electrostatic image is composed by a binder resin, and a magnetic material and/or a colorant. The binder resin (a) comprises a styrene resin polymerized in the presence of a poly-functional polymerization initiator, (b) provides a molecular weight distribution on a GPC chromatogram showing a maximum (P1) in a molecular weight range of 3.5.times.10.sup.3 -5.times.10.sup.4 and a maximum (P2) or shoulder in a molecular weight range of at least 1.times.10.sup.5, and (c) contains 15 wt. % or less of a resin component in a molecular weight range of at most 3.times.10.sup.3. Further the toner contains at most 100 ppm of styrene and benzaldehyde.

REFERENCES:
patent: 5166027 (1992-11-01), Machida et al.
patent: 5185229 (1993-02-01), Sato et al.

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