Toner

Details Toner Toner

2006-05-30

2006-05-30

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...

C430S109100, C430S109200, C430S109300, C430S109400, C430S111400, C430S107100

Reexamination Certificate

active

07052814

ABSTRACT:
A toner for use in an oil-less fixing system free from an oil coating on a fixing roller, the toner includes a binder resin and a wax as well as carbon black having an oil absorption of 50 to 100 mL/100 g where the toner is the black toner or a coloring agent where the toner is the color toner, and wherein the binder resin has a rate of decrease of storage elastic modulus G′ of not more than 0.3 Pa/° C. as determined in association with temperature increase in the range of 160 to 200° C. The binder resin preferably has a weight average molecular weight [Mw] of 10,000 to 200,000, an [Mw/Mn] ratio between [Mw] and a number average molecular weight [Mn] thereof in the range of 1 to 15, or a peak rate of decrease of the storage elastic modulus G′ in the temperature range of 70 to 100° C. The toner suited for use in the oil-less fixing system and particularly suitable for forming a color image is provided.

REFERENCES:
patent: 5968701 (1999-10-01), Onuma et al.
patent: 6500594 (2002-12-01), Hamano et al.
patent: 2001-296692 (2001-10-01), None
patent: 2001-296693 (2001-10-01), None

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