Electrophotographic toner

Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...

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430138, G03G 900

Patent

active

053894863

ABSTRACT:
An electrophotographic toner containing a specific compound as the charge control agent is described. The electrophotographic toner according to the present invention have a sharper distribution of the amount of electrification and better moisture resistance and time stability than those of a toner wherein a conventional charge control agent is used. Therefore it can provide an image having a very high gradation and has a very high capability of repeatedly forming an image. Since the charge control agent, as such, is essentially colorless, a colorant can freely be selected according to a hue required of a color toner and the toner is not detrimental to the hue inherent in a dye and a pigment.

REFERENCES:
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patent: 4837394 (1989-06-01), Alexandrovich et al.
patent: 4988615 (1991-01-01), Davies et al.
patent: 5061589 (1991-10-01), Shindoh et al.
patent: 5147748 (1992-09-01), Gitzel et al.
patent: 5225305 (1993-07-01), Kiyoyanagi et al.

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