Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1998-09-24
1999-12-28
Martin, Roland
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430111, 430120, 399262, G03G 9083, G03G 1308, G03G 1508
Patent
active
060079576
ABSTRACT:
A magnetic toner includes magnetic toner particles containing at least a binder resin and a magnetic iron oxide. The magnetic iron oxide contains 0.2 to 4.0% by weight of at least one metal element selected from the group consisting of Mn, Zn, Ni, Cu, Co, Cr, Cd, Al, Sn and Mg, and 0.2 to 0.8% by weight of silicon element on the basis of an iron element; the ratio (B.sub.si /A.sub.Si).times.100 of the content B.sub.Si of the silicon element present in the magnetic iron oxide up to an iron element solubility of 20% by weight to the total content A.sub.Si of the silicon element present in the magnetic iron oxide is 45 to 85%; the ratio (C.sub.si /A.sub.Si).times.100 of the content C.sub.Si of the silicon element present in the magnetic iron oxide up to an iron element solubility of 10% by weight to the total content A.sub.Si is 35 to 70%; and the magnetic toner has a weight average particle diameter of 3.5 to 10.0 .mu.m, and contains 0 to 30% by volume of magnetic toner particles having a volume particle diameter of 12.7 .mu.m or more determined from a volume distribution.
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Patent Abstracts of Japan, vol. 95, No. 8, 9/95 of JP 7-128901.
Data Base, Section Ch., Week 9229, Derwent Publ.; XP 002097605, for JP 4-162050.
Katada Masaichiro
Kobori Takakuni
Okubo Nobuyuki
Onuma Tsutomu
Takano Masao
Canon Kabushiki Kaisha
Martin Roland
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