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1. US4963456 - Electrophotographic toner

Office
United States of America
Application Number 07320301
Application Date 22.02.1989
Publication Number 4963456
Publication Date 16.10.1990
Grant Number 4963456
Grant Date 16.10.1990
Publication Kind A
IPC
G03G 9/087
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
9Developers
08with toner particles
087Binders for toner particles
CPC
G03G 9/08702
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
9Developers
08with toner particles
087Binders for toner particles
08702comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
G03G 9/08795
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
9Developers
08with toner particles
087Binders for toner particles
08784Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775
08795characterised by their chemical properties, e.g. acidity, molecular weight, sensitivity to reactants
G03G 9/08797
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
9Developers
08with toner particles
087Binders for toner particles
08784Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775
08797characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature
Y10S 526/934
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
526Synthetic resins or natural rubbers -- part of the class 520 series
934Electrodeposit, e.g. electrophoretic, xerographic
Applicants Mitsui Toatsu Chemicals, Incorporated
Inventors Shin Masaaki
Hirayama Nobuhiro
Ishikawa Keiichi
Misawa Akira
Agents Oblon, Spivak, McClelland, Maier & Neustadt
Priority Data 1987171087 10.07.1987 JP
Title
(EN) Electrophotographic toner
Abstract
(EN)

Electrophotographic toner is provided which contains 30-80% by weight of a polymer per total weight of a resin included in the toner, said polymer is obtained by continuously feeding a vinyl monomer, a polymerization initiator and a solvent into a system of 190.degree.-230.degree. C. to conduct polymerization under a liquid state, and said polymer is a vinyl polymer having a number average molecular weight of 1,000-5,000 and a glass transition temperature of 40.degree.75.degree. C. The preparation method of the electrophotographic toner is also provided. The toner is excellent in the fixing ability at high duplication speed and lower temperatures.