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1. EP0323512 - TONER FOR ELECTROPHOTOGRAPHY.

Office
European Patent Office
Application Number 87906448
Application Date 30.09.1987
Publication Number 0323512
Publication Date 12.07.1989
Publication Kind B1
IPC
G03G 9/08
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
9Developers
08with toner particles
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
G03G 9/08
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
9Developers
08with toner particles
Applicants MITSUI TOATSU CHEMICALS
Inventors SHIN MASAAKI
HIRAYAMA NOBUHIRO
ISHIKAWA KEIICHI
MISAWA AKIRA
Designated States
Priority Data 1987171087 10.07.1987 JP
8700718 30.09.1987 JP
Title
(DE) TONER FÜR ELEKTROPHOTOGRAPHIE.
(EN) TONER FOR ELECTROPHOTOGRAPHY.
(FR) TONER POUR ELECTROPHOTOGRAPHIE.
Abstract
(EN) Improved toner for electrophotography contains 30 to 80 wt.% based on the total wt. of resins in the toner, of a vinyl polymer (1). The vinyl polymer (1) is obtd. by a liq. state polymerisation process, in which vinyl monomers (2), polymerisation initiator and solvent are continuously supplied into a system, the temp. of which is maintained in the range 190-230 deg.C. The obtd. polymer (1) has number average wt. between 1,000 and 5,000 (pref. 1,500-2,800) and a glass transition temp. between 40 and 75 deg.C (pref. 50-70 deg.C). The vinyl monomer is styrene alone, or a mixt. of styrene and methacrylic acid methylester and/or methacrylic acid. The polymerisation initiator is dialkylperoxide. It is specified that in the process for producing the toner the polymerisation is carried out at 190-230 deg.C and the monomers are reacted in a soln. having the above-mentioned polymerisation initiator and the above-mentioned compsn. of reaction materials. When the polymerisation is complete, the soln.is subject to flashing in a vacuum and the solvent sepd. from the soln. should be used again.
(FR) Toner pour électrophotographie et procédé de production. Le toner contient de 30 à 80 % en poids, en fonction du poids total de résines incorporées dans le toner, d'un polymère vinylique obtenu par l'alimentation en continu en un monomère vinylique, un initiateur de polymérisation et un solvant, d'un système à une température comprise entre 190 et 230°C, pour effectuer la polymérisation à l'état liquide. Le polymère vinylique présente un poids moléculaire moyen compris entre 40 et 75°C. Ce toner présente d'excellentes caratéristiques de fixage à grande vitesse ou à basse température.