Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1998-02-12
1999-08-24
Martin, Roland
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430126, 399252, G03G 1322, G03G 1508
Patent
active
059423668
ABSTRACT:
An electrophotographic toner composition suitable for heat-fixation and showing good storage characteristics is constituted by polymer components, a colorant and a metal-containing organic compound. The toner composition shows a melt index (at 125.degree. C., 10 kg-load) of 5-25 g/10 min., and the polymer components are characterized by (a) containing substantially no THF (tetrahydrofuran)-insoluble content, (b) including a THF-soluble content thereof providing a GPC (gel permeation chromatography) chromatogram showing i) a main peak in a molecular weight region of 2.times.10.sup.3 -3.times.10.sup.4, and a sub-peak or shoulder in a molecular weight region of at least 10.sup.5, and ii) an areal percentage of 3-10% in a molecular weight region of at least 10.sup.6, and (c) including a polymer component (H) in a molecular weight region of at least 10.sup.5 obtained by polymerization using a polyfunctional polymerization initiator and a mono-functional polymerization initiator.
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Patent Abstracts, Japan, vol. 14, No. 425, P-1082 (4188) May 24, 1990, JPA 02-064556 Database WPI Week 8941, Derwent Publn. AN-89-298039 of JPA 1-221-757.
Nakazawa Akihiko
Ohno Manabu
Okubo Nobuyuki
Suematsu Hiroyuki
Suzuki Shunji
Canon Kabushiki Kaisha
Martin Roland
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