Master batch and toner for use in electrophotography

Details Master batch and toner for use in electrophotography Master batch and toner for use in electrophotography

2006-04-11

2006-04-11

Chapman, Mark A. (Department: 1756)

Radiation imagery chemistry: process, composition, or product th

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

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

C430S109400, C524S495000, C524S496000

Reexamination Certificate

active

07026088

ABSTRACT:
The master comprises a polyester resin as a binder resin and a carbon black as a colorant having a primary particle size of 10 nm to 100 nm, is blended with 30 to 60 parts by weight of the carbon black, has a lightness L* of 20 or more; and the reflectance A at 400 nm thereof and the reflectance B at 700 nm thereof fall within the range satisfying the relation given by the following formula [1]:in-line-formulae description="In-line Formulae" end="lead"?0.5<B/A<5[1]in-line-formulae description="In-line Formulae" end="tail"?The carbon black in the toner can be made to be present stably in the conditions such that the carbon black has a small primary particle size and is homogeneously dispersed.

REFERENCES:
patent: 6121369 (2000-09-01), Stack et al.
patent: 61-156054 (1986-07-01), None
patent: 62-030259 (1987-02-01), None
patent: 63-205664 (1988-08-01), None
patent: 10-319642 (1998-12-01), None

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