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公开(公告)号：JP5561050B2
公开(公告)日：2014-07-30
申请号：JP2010203334
申请日：2010-09-10
申请人： 三菱化学株式会社
摘要： PROBLEM TO BE SOLVED: To provide an image forming device and a process cartridge that can stably form an image with high quality by using a toner for electrostatic charge image development that can provide stable quality excellent in fixation image intensity with either of low-temperature fixability and blocking resistance as well as production stability, and electrophotographic photoreceptor containing a charge transport material with a certain structure.SOLUTION: In an image forming device using at least a toner for electrostatic charge image development and electrophotographic photoreceptor, the toner contains crystalline polyester resin of 5-40 pts.mass and wax of 3-20 pts.mass based on 100 pts.mass of polyester resin modified by at least vinyl resin, and elastic deformation rate of an outermost surface layer of the photoreceptor is equal to or greater than 40%.
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公开(公告)号：JP5088470B2
公开(公告)日：2012-12-05
申请号：JP2007175865
申请日：2007-07-04
申请人： 三菱化学株式会社
发明人： 宇清 徐
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing an electrostatic charge image developing toner, the toner having favorable fixability appropriate for enhancing picture qualities and processing speed, and stable preservability. SOLUTION: The method of manufacturing an electrostatic charge image developing toner includes an aggregation step of aggregating polymer primary particles to obtain particle aggregates and an ageing step of melt-sticking the polymer primary particles constituting the particle aggregates, wherein two kinds of polymer primary particles having glass transition temperatures different by not less than 15°C from each other are aggregated in the aggregation step. COPYRIGHT: (C)2009,JPO&INPIT
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公开(公告)号：JP3961231B2
公开(公告)日：2007-08-22
申请号：JP2001109447
申请日：2001-04-09
申请人： 三菱化学株式会社
发明人： 宇清 徐
摘要： PROBLEM TO BE SOLVED: To provide a method for producing an electrostatic charge image developing toner excellent in electrostatic property and giving good image quality. SOLUTION: In the method for producing the electrostatic charge image developing toner having an aggregating step in which primary polymer particles and colorant particle are aggregated while agitating a dispersion containing at least these particles in an agitation vessel to obtain particle aggregates and an aging step in which the particle aggregates are fused by holding at a temperature higher than the glass transition temperature of the primary polymer particles by >=10 deg.C for a prescribed time, the proportion of a carboxyl- containing monomer in monomer units constituting the primary polymer particles is adjusted to
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公开(公告)号：JP3917009B2
公开(公告)日：2007-05-23
申请号：JP2002163892
申请日：2002-06-05
申请人： 三菱化学株式会社
发明人： 宇清 徐
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing an electrostatic charge image developing toner capable of controlling the shape and particle size distribution of particle agglomerates, imparting sharpness to the particle size distribution of toner particles, capable of attaining the objective circularity in a short period of time and ensuring a small amount of coarse powder produced in aging. SOLUTION: In the method for manufacturing the toner including an agglomeration step in which polymer primary particles are agglomerated in a dispersion containing the particles and a colorant and an aging step in which fusion between particles in the resulting particle agglomerates is caused, polymer primary particles are additionally added in the agglomeration step. COPYRIGHT: (C)2004,JPO
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公开(公告)号：JP3875499B2
公开(公告)日：2007-01-31
申请号：JP2001058230
申请日：2001-03-02
申请人： 三菱化学株式会社
IPC分类号： G03G9/08 , G03G9/087 , C08F2/22 , C08F2/44 , C08F289/00 , C08J3/16 , C08L101/00 , G03G9/097
摘要： PROBLEM TO BE SOLVED: To provide an electrostatic charge image developing toner excellent in fixing property and offset resistance. SOLUTION: In the electrostatic charge image developing toner prepared through a process of aggregating at least polymer primary particles and coloring agent fine particles to obtain particle aggregates, the polymer primary particles are prepared by emulsion polymerization of a monomer mixture in the presence of wax fine particles having 0.4 to 1.5 μm volume average particle size.
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公开(公告)号：JP3680688B2
公开(公告)日：2005-08-10
申请号：JP2000067944
申请日：2000-03-13
申请人： 三菱化学株式会社
摘要： PROBLEM TO BE SOLVED: To provide an electrostatic charge image developing toner superior in fixability and offset resistance and blocking resistance and good in the OHP transparency of an image to be formed, and to provide a method for manufacturing the toner at a low cost. SOLUTION: The method for manufacturing the toner comprises a first process for executing a seed emulsion polymerization by adding a monomer mixture containing a monomer having an acid polar group or a basic polar group in the presence of a fine wax powder, and a second process for mixing the obtained polymer dispersed liquid with at least a colorant dispersed liquid and further, adding 0.01-100 pts.wt. of an electrolyte per 100 pts.wt. of the slid component of the polymer to form a mixed dispersion liquid and a third process for aggregation of the particles in this mixed dispersion liquid to obtain the aggregated particles.
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公开(公告)号：JP5560994B2
公开(公告)日：2014-07-30
申请号：JP2010168420
申请日：2010-07-27
申请人： 三菱化学株式会社
摘要： PROBLEM TO BE SOLVED: To provide an image forming device for stably forming an image of high quality by using toner for developing an electrostatic charge image which satisfies both low-temperature fixability and blocking resistance, is excellent in fixed image strength, is further excellent in production stability and is capable of providing stable quality and an electrophotographic photoreceptor containing a charge transport material having a specific structure.SOLUTION: In an electrophotographic process using toner for developing an electrostatic charge image and an electrophotographic photoreceptor, the toner contains at least a binder resin, a colorant and wax and the binder resin is produced by a first step of polymerizing a long chain (meth) acrylate resin through a second step of polymerizing a vinyl monomer in the presence of the polymer obtained in the first step. In addition, the electrophotographic photoreceptor contains a binder resin containing a repeating unit represented by the following general formula (1) in the outermost surface layer. (Rto Rrepresent a hydrogen atom or an alkyl group.)
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