Konishiroku Photo Industry Co., Ltd.

Konica Minolta Business Technologies, Inc.

Kabushiki Kaisha Toshiba

Konica Corporation

Lucent Technologies Inc.

Chugai Seiyaku Kabushiki Kaisha

Tokyo Shibaura Denki Kabushiki Kaisha

Konishiroku Photo Ind. Co., Ltd.

Konica Minolta Business Machines Technologies, Inc.

Mikio Koyama

Kenji Hayashi

Kenichiro Okaniwa

Hiroshi Tanimoto

Shozo Kikugawa

Tomoe Kikuchi

Hiroshi Yamazaki

Kazuya Isobe

Masao Asano

Yasuharu Saita

Hideaki Iwama

Meizo Shirose

Noboru Mizukura

Makoto Nomiya

Yasuo Tsuda

Morio Kobayashi

Tadashi Arai

Yoshiaki Koizumi

Kazumi Arai

Masakuni Saruhashi

Takamasa Ueda

Kunihiro Furukawa

Tetsuro Itakura

Shinichi Suzuki

Hiroshi Nagasawa

Hiroyuki Kimura

Jiro Takahashi

Naohiro Hirose

Takashi Ueno

Masafumi Uchida

Hiroaki Obata

Hiroyuki Yasukawa

Satoru Ikeuchi

Yoshiki Nishimori

Satoshi Kawakatsu

Chikashi Nakagawara

Yasuhiko Muramatsu

Tsuyoshi Uchida

Kiyoshi Tamaki

Yuzuru Sato

Yoshitaka Kasagi

Noriyuki Kinpara

Tsutomu Iwamoto

Michitoshi Iwao

Yuko Ohmachi

Seikichi Yasoshima

Soichi Zanma

Takasi Momose

Souichi Zanma

Tomoji Akashi

The object aims to improve the reproducibility of color and the stability in density of a toner. Disclosed is a toner comprising at least a resin and a colorant, wherein the colorant comprises a compound represented by general formula (1) and a compound represented by general formula (2). [In general formula (1), Rto Rrespectively denote a hydrogen atom, a halogen atom, an alkyl group, or an alkyl group containing a fluorine atom, provided that at least one of Rto Rdenotes a chlorine atom]. [In general formula (2), Rto Rrespectively denote a hydrogen atom, or an alkyl group having 1 to 4 carbon atoms; Rand Rrespectively denote a hydrogen atom, or an alkyl group having 1 to 2 carbon atoms; Rdenotes a hydrogen atom, or an alkyl group having 1 to 4 carbon atoms; m denotes a number of 1 or 2; Adenotes a chlorine ion or a sulfonic acid compound ion; and n denotes a number of 1 or 2.

Toner

An electrophotographic toner comprising a resin and a colorant, wherein:

Electrophotographic toner and manufacturing method thereof

A method for producing an electrophotographic toner comprising the step of polymerizing two or more polymerizable monomers under existence of a non-polar liquid hydrocarbon, wherein at least one of the polymerizable monomers comprises a polar group; a kinematic viscosity of the liquid hydrocarbon at 40&#xb0; C. is in the range of 7-300 mm/s.

Method for producing electrophotographic toner

Provided can be easily producible toner containing polyester resin particles, exhibiting excellent fixability and fine line reproduction, in which high quality images can stably be formed for a long duration, the toner manufacturing method, and the image forming method. Also disclosed is a manufacturing method of toner possessing the steps of conducting a polymerization process for acquiring polyester resin particles via condensation-polymerization of carboxylic acid and alcohol employing oil droplets after forming the oil droplets including a polymerizable composite containing at least one kind of carboxylic acid with divalence or more and at least one kind of alcohol with divalence or more in an aqueous medium containing a surfactant including a compound having a long chain hydrocarbon group and acidic group, and conducting a coagulation process for acquiring toner particles by coagulating at least the polyester particles in the aqueous medium.

Method of manufacturing toner, toner, and image forming method

Disclosed is a method of manufacturing toner possessing the steps of conducting a polymerization process for acquiring wax-containing polyester resin particles via condensation-polymerization of carboxylic acid and alcohol employing oil droplets after forming the oil droplets made of wax and a polymerizable monomer containing at least one kind of carboxylic acid with divalence or more and at least one kind of alcohol with divalence or more in an aqueous medium containing a surfactant including a compound having a long chain hydrocarbon group and acidic group, and conducting a process of coagulating at least the wax-containing polyester particles in the aqueous medium.

A toner including toner particles each containing a resin and a colorant, wherein the toner particle has:

Toner, manufacturing method thereof and image forming method

A method of preparing an electrophotographic toner is disclosed, comprising subjecting polyester resin particles and colored microparticles to coagulation and fusion in an aqueous medium to form toner particles, wherein the colored microparticles comprise a colorant and a crosslinked polyester resin or a nitrogen-containing polycondensate resin.

Electrophotographic toner

An electrostatic image developing toner comprising a binder resin and a colorant, wherein the toner contains a mixture of: (i) a compound represented by Formula (3); and (ii) a compound represented by Formula (1) and/or (2), wherein Rto Reach represent an alkyl group having 10 to 30 carbon atoms and X represents H or &#x2014;CO&#x2014;R, wherein Rrepresents an alkyl group having 1-4 carbon atoms: 

Electrostatic image developing toner

A toner is disclosed, comprising a resin (A), a colorant (B) and an alkylidenecarboxylic acid (C).

Toner and method of manufacturing the toner

A method of manufacturing a toner comprising the steps of: (i) forming oil droplets in an aqueous medium comprising a surfactant having a long chain hydrocarbon group and an acid group, the oil droplets comprising: (i-a) a polycarboxylic acid having two or more carboxyl groups, (-b) a polyalcohol having two or more hydroxyl groups, (i-c) a styrene compound, (i-d) a (meth)acrylate ester; (ii) polycondensing the polycarboxylic acid and the polyalcohol by heating to form a polyester resin in the oil droplets; (iii) radically polymerizing the styrene compound and the (meth)acrylate ester by supplying radicals to form a styrene-acryl copolymer resin in the droplets, as a result of steps (ii) and (iii), composite resin particles containing the polyester resin and the styrene-acryl copolymer resin are formed; and (iv) coagulating the composite resin particles in an aqueous medium.

An electrostatic image developing toner comprising a binder resin and a colorant, wherein the toner comprises a compound represented by the following Formula (1): wherein, R, R, Rand Reach independently represent an alkyl group having 10 to 30 carbon atoms and the alkyl group may have a substituent.

A toner for developing an electrostatic charge image comprising a compound represented by a following formula (1): wherein X represents H or &#x2014;CO&#x2014;R; Rrepresents an alkyl group having 1 to 4 carbon atoms and the alkyl group may have a substituent; Rthough Rindependently represent an alkyl group having 10 to 30 carbon atoms and the alkyl group may have a substituent; and Rthrough Rmay be either the same or different.

Electrostatic charge image developing toner

A toner for electrophotography is disclosed. The resin binder is obtained by fusing fine resin particles comprising a crystalline material and amorphous polymer in a water-based medium. The crystalline material preferably has a melting point of 60 to 130&deg; C., a number average molecular weight of 1,500 to 15,000, and a melt viscosity at the melting point &plus;20&deg; C. of not more than 100 Pa&middot;s, and the amorphous polymer is preferably composed of a radically polymerizable monomer.

Toner and production method of the same

A non-spherical toner particle for developing an electrophotographic image and its producing method are disclosed. The toner particle is one which is produced by coagulating and fusing a plurality of pigment-including polymer particles which are formed by emulsion polymerization of at least one hydrophobic polymerizable monomer in an aqueous phase in the presence of a surfactant, pigment particles, which has a calcium content of zero to 0.1% by weight, dispersed in said aqueous phase and a water-soluble radical polymerization initiator.

Toner particle for electrophotography and production method thereof

Disclosed is a toner for developing an electrostatic latent image, said toner having a BET specific surface area of not less than 5m.sup.2 /g and a particle size distribution (2SD) of not more than 5 .mu.m.

Toner for developing an electrostatic latent image

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Kunitachi, Japan

Mikio Koyama