As A Nitrogen- Or Phosphorus-containing Polymer Patents (Class 430/108.22)
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Patent number: 8936894Abstract: A toner comprising toner particles, each of which contains a binder resin, a compound in which a polymer portion is bound to an azo skeleton structure, and a magenta pigment.Type: GrantFiled: February 26, 2013Date of Patent: January 20, 2015Assignee: Canon Kabushiki KaishaInventors: Takayuki Toyoda, Yasuaki Murai, Waka Hasegawa, Yuki Hasegawa, Masashi Kawamura, Taiki Watanabe, Masanori Seki, Chiaki Nishiura, Ayano Mashida, Masashi Hirose
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Publication number: 20150017582Abstract: An electrostatic latent image developing toner includes toner particles each including a toner core and a shell layer. The shell layer contains a resin including a unit derived from a monomer of a thermosetting resin and a unit derived from a thermoplastic resin. The thermosetting resin is one or more resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin. When heat and pressure are applied to a toner layer formed on a polyester film under conditions of a temperature of 140° C. and a pressure of 7 MPa so that the toner particles are not superimposed, the toner particles of the toner layer are broken in a manner that a melt of a component of the toner core flows out from a plurality of points in an outer surface of the shell layer.Type: ApplicationFiled: July 7, 2014Publication date: January 15, 2015Applicant: KYOCERA DOCUMENT SOLUTIONS INC.Inventors: Yoshio OZAWA, Noriaki SAKAMOTO, Hiroaki MORIYAMA, Tomoyuki OGAWA, Takatoshi NOZAKI
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Patent number: 8932788Abstract: The present invention provides a toner containing at least a binder resin and a pigment, wherein the amount of the pigment in the toner is 3.0% by mass to 8.5% by mass, the volume average particle diameter of the toner is 2.0 ?m to 6.0 ?m, and a monochrome image, which has been fixed on a recording medium so that the amount of the toner adhered onto the recording medium is 0.25 mg/cm2, has a reflection density of 1.2 to 2.5.Type: GrantFiled: October 6, 2008Date of Patent: January 13, 2015Assignee: Ricoh Company, Ltd.Inventors: Shinichi Wakamatsu, Hiroshi Yamashita, Naohiro Watanabe, Tsuyoshi Sugimoto
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Patent number: 8927187Abstract: A cyan toner comprising toner particles, each of which contains a binder resin, a compound in which a polymer portion is bound to an azo skeleton structure, and a phthalocyanine pigment serving as a colorant.Type: GrantFiled: February 26, 2013Date of Patent: January 6, 2015Assignee: Canon Kabushiki KaishaInventors: Yasuaki Murai, Takayuki Toyoda, Waka Hasegawa, Yuki Hasegawa, Masashi Kawamura, Taiki Watanabe, Masanori Seki, Chiaki Nishiura, Ayano Mashida, Masashi Hirose
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Publication number: 20150004538Abstract: An object of the present invention is to provide an azo compound capable of improving the dispersibility of an azo pigment in a non-water-soluble solvent. The object of the present invention is achieved with an azo compound wherein a coloring matter moiety having a diketone azo structure and a polymer are bonded to each other.Type: ApplicationFiled: February 27, 2013Publication date: January 1, 2015Inventors: Masashi Kawamura, Yasuaki Murai, Waka Hasegawa, Yuki Hasegawa, Takayuki Toyoda, Taiki Watanabe, Masanori Seki, Chiaki Nishiura, Ayano Mashida, Masashi Hirose
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Publication number: 20150004539Abstract: An object of the present invention is to provide a magenta toner having improved dispersibility of a magenta pigment in a binder resin and a high coloring ability, enabling suppression of fogging, and having high transfer efficiency. The object can be attained by a toner including toner particles containing a binder resin, a compound having an azo skeleton bound to a polymeric portion, and a magenta pigment as a colorant.Type: ApplicationFiled: February 27, 2013Publication date: January 1, 2015Applicant: Canon Kabushiki KaishaInventors: Taiki Watanabe, Takayuki Toyoda, Yasuaki Murai, Waka Hasegawa, Yuki Hasegawa, Masashi Kawamura, Masanori Seki, Chiaki Nishiura, Ayano Mashida, Masashi Hirose
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Publication number: 20140377698Abstract: This disclosure relates to a polymerized toner prepared by suspension polymerization. Particularly, this disclosure relates to a polymerized toner that further comprises a specific functional macro monomer, a polymer thereof, or a mixture thereof, in addition to a binder resin, and a pigment, a pigment stabilizer, a charge control agent and wax, which are dispersed in the binder resin, and thus can be fixed at low temperature in a development process, and exhibit high glossiness and excellent transfer efficiency.Type: ApplicationFiled: December 4, 2012Publication date: December 25, 2014Applicant: LG CHEM, LTD.Inventors: Wook Jang, Chang-Soon Lee, Woo-Cheul Jung, Jung Woo Kim
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Patent number: 8916318Abstract: A toner comprising toner particles, each of which contains a binder resin, a compound in which a polymer portion is bound to an azo skeleton structure are linked, and carbon black.Type: GrantFiled: February 26, 2013Date of Patent: December 23, 2014Assignee: Canon Kabushiki KaishaInventors: Yuki Hasegawa, Yasuaki Murai, Waka Hasegawa, Takayuki Toyoda, Masashi Kawamura, Masatake Tanaka, Masashi Hirose
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Patent number: 8916324Abstract: The present invention provides a toner containing base particles formed by emulsifying or dispersing, in an aqueous medium, a toner composition liquid which is obtained by dissolving or dispersing, in an organic solvent, at least a binder resin soluble in the organic solvent and a colorant masterbatch containing a colorant and a colorant dispersion resin, wherein the colorant dispersion resin is a resin having sparing solubility defined below: where the “sparing solubility” means that when 4 parts by mass of the colorant dispersion resin are added to and mixed with 10 parts by mass of the organic solvent, the mixture becomes white turbid at 25° C. or becomes a transparent solution once at 25° C. and then becomes white turbid within 12 hours.Type: GrantFiled: January 13, 2011Date of Patent: December 23, 2014Assignee: Ricoh Company, Ltd.Inventors: Kazumi Suzuki, Tatsuya Morita
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Patent number: 8916319Abstract: Provided is a toner manufactured in an aqueous solvent, whereby a satisfactory image density can be obtained and the toner laid-on level on a recording medium can be reduced with a normal added concentration of pigment without adding a large quantity of pigment to the toner. The toner is manufactured in an aqueous medium by the suspension polymerization or dissolution suspension method and contains a binder resin, a pigment and an azo compound. The azo compound is a specific azo compound, and the absolute value of the difference in zeta potential between the binder resin and the azo compound is 25 mV or less.Type: GrantFiled: February 26, 2013Date of Patent: December 23, 2014Assignee: Canon Kabushiki KaishaInventors: Naotaka Ikeda, Takayuki Toyoda, Masashi Kawamura, Hidekazu Fumita, Emi Watanabe, Yasuhiro Hashimoto, Yuhei Terui
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Patent number: 8911925Abstract: A liquid developer contains a carrier liquid, and toner particles containing a binder resin and a pigment surface-treated with a polyallylamine compound as a colorant.Type: GrantFiled: August 21, 2012Date of Patent: December 16, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Masahiro Oki, Yoshihiro Inaba, Akira Imai, Daisuke Yoshino, Takako Kobayashi, Koji Horiba
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Publication number: 20140356779Abstract: Provided is a black toner which has improved dispersibility of carbon black in a binding resin and has a high coloring power. Also provided is a black toner which suppresses fogging and has high transfer efficiency. The toner includes a toner particle containing a binding resin, a compound in which a polymer moiety is bound to an azo skeleton, and carbon black as a coloring agent.Type: ApplicationFiled: February 22, 2013Publication date: December 4, 2014Applicant: CANON KABUAHIK KAISHAInventors: Waka Hasegawa, Yasuaki Murai, Yuki Hasegawa, Takayuki Toyoda, Masatake Tanaka, Masashi Kawamura, Masashi Hirose
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Publication number: 20140342281Abstract: An electrostatic latent image developer of the present invention includes a resin, a colorant and a colorant dispersant, wherein the colorant dispersant contains a first polymer compound containing a constitutional unit derived from a monomer A, a constitutional unit derived from a monomer B and a constitutional unit derived from a monomer C, the monomer A is 4-vinylpyridine, the monomer B is CH2?CR1—COOR2 (where R1 represents hydrogen or a methyl group; and R2 represents an alkyl group having 1 to 10 carbon atoms), and the monomer C is CH2?CR3—COOR4 (where R3 represents hydrogen or a methyl group; R4 represents (CH2CH2O)nCH3 or (CH2CH2O)nCH2CH3; and n represents an integer of 12 to 18).Type: ApplicationFiled: May 6, 2014Publication date: November 20, 2014Applicant: KONICA MINOLTA, INC.Inventors: CHIAKI YAMADA, MASAHIRO ANNO, MIKIHIKO SUKENO
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Patent number: 8889328Abstract: A developer to develop an electrostatic latent image satisfying the requirements of 0.85?Q60/Q600 and 10?Q600?20, where Q60 (??C/g) represents a charge amount of the developer when a sample, made by adding the developer to a carrier such that the concentration of the developer is 5%, is shaken for 60 seconds, and Q600 (??C/g) represents a charge amount of the developer when shaken for 600 seconds under the same conditions.Type: GrantFiled: October 23, 2012Date of Patent: November 18, 2014Assignee: Oki Data CorporationInventor: Hayato Matsumoto
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Patent number: 8859175Abstract: The invention provides a transparent toner for developing an electrostatic latent image, including a binder resin and a release agent, the difference between the endothermic peak Tm of the release agent in a temperature increasing process and the exothermic peak Tc of the release agent in a temperature decreasing process being from about 10° C. to about 50° C., where Tm and Tc are measured with a differential scanning calorimeter (DSC) according to the ASTM method.Type: GrantFiled: October 13, 2009Date of Patent: October 14, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Atsushi Sugawara, Masaru Takahashi, Yasuo Kadokura, Masanobu Ninomiya
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Patent number: 8852841Abstract: A method for producing a toner for electrostatic image development containing at least a resin binder and a charge control agent, including step 1: melt-kneading components containing a resin binder and a charge control agent to provide a melt-kneaded product; and step 2: pulverizing the melt-kneaded product, and classifying a pulverized product, wherein the resin binder contains a polyester A obtained by polycondensing an alcohol component containing 1,2-propanediol and a carboxylic acid component containing a rosin compound and an aliphatic dicarboxylic acid compound having 6 to 10 carbon atoms, wherein 1,2-propanediol is contained in the alcohol component of the polyester A in an amount of 85% by mol or more. The toner for electrostatic image development obtained by the method of the present invention can be suitably used in, for example, the development or the like of latent image formed in electrophotography, an electrostatic recording method, an electrostatic printing method, or the like.Type: GrantFiled: November 30, 2012Date of Patent: October 7, 2014Assignee: Kao CorporationInventors: Takeshi Ashizawa, Shogo Watanabe, Takashi Kubo, Norihiro Hirai
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Publication number: 20140295341Abstract: Metal-oxide composite particles are used as a toner additive.Type: ApplicationFiled: October 25, 2012Publication date: October 2, 2014Inventors: Dmitry Fomitchev, Eugene N. Step
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Publication number: 20140255841Abstract: A toner having charge control agents which impart excellent triboelectric charging characteristics. In embodiments, the toner particles are made by a process in which charge control agent is added and adhered to the particle surface through washing steps and is maintained through the drying steps. The process of the present embodiments impart desirable charging characteristics to the toner particles.Type: ApplicationFiled: May 22, 2014Publication date: September 11, 2014Applicant: XEROX CORPORATIONInventors: Robert D. Bayley, Maura A. Sweeney, Grazyna E. Kmiecik-Lawrynowicz, Daniel W. Asarese
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Patent number: 8828638Abstract: A two-component developer including a yellow toner and a carrier, the yellow toner including at least one of C. I. Pigment Yellow 155 or C. I. Pigment Yellow 185, and an azo pigment, the carrier including a first resin, magnetic particles dispersed in the first resin, and elements of Cu, Zn, Ni and Mn each in an amount of from 0 to about 2,000 ppm.Type: GrantFiled: September 28, 2009Date of Patent: September 9, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Norihito Fukushima, Manabu Serizawa, Katsuyuki Kitajima
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Patent number: 8828633Abstract: To obtain a toner which has excellent charge rise and stability, tends to have a sharp charge distribution, has excellent pigment dispersion properties, exhibits no disarray in an image even during a high-speed copying operation, and can stably output high-resolution images. A toner comprising toner particle containing a binder resin, a colorant, resin PA, and resin PB, wherein the resin PA has unit A represented by Formula (1), the resin PB has unit B represented by Formula (2), a content “a” of the unit A in the toner particle is 2.00 ?mol/g or more, and a molar ratio b/a of the content “a” and a content “b” of the unit B in the toner particle is 0.10 or more and 10.00 or less.Type: GrantFiled: December 20, 2010Date of Patent: September 9, 2014Assignee: Canon Kabushiki KaishaInventors: Hitoshi Itabashi, Takashi Kenmoku, Harumi Takada
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Patent number: 8815484Abstract: An object of the present invention is to provide a toner having high dispersibility of an azo pigment in a binder resin and a good color tone, having suppressed image fogging and high transfer efficiency, and providing a stable image for a long time. The toner including toner base particles, each of which includes: at least a binder resin, a compound in which a specific bisazo skeleton unit bonds to a specific polymer resin unit, and an azo pigment as a colorant.Type: GrantFiled: October 5, 2012Date of Patent: August 26, 2014Assignee: Canon Kabushiki KaishaInventors: Masatake Tanaka, Masashi Hirose, Takayuki Toyoda, Waka Hasegawa, Yasuaki Murai, Masashi Kawamura, Yuki Hasegawa
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Publication number: 20140193750Abstract: An electrostatic charge image developing toner includes toner particles; and an external additive that is externally added to surfaces of the toner particles, in which a content of nitrogen atoms on the surfaces of the toner particles is from 0-8 atomic % to 5.0 atomic % and a content of nitrogen atoms at a depth of 10 nm inside from the surfaces of the toner particles is 0.4 atomic % or less when measured by X-ray photoelectron spectroscopy.Type: ApplicationFiled: October 8, 2013Publication date: July 10, 2014Applicant: FUJI XEROX CO., LTD.Inventors: Noriyuki MIZUTANI, Tsuyoshi MURAKAMI, Yukiaki NAKAMURA, Satoshi KAMIWAKI
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Publication number: 20140120466Abstract: An electrostatic latent image developing toner includes toner base particles including a binder resin and an external additive attached to surfaces of the toner base particles. The external additive contains silica covered with a coating layer containing a nitrogen containing resin.Type: ApplicationFiled: October 24, 2013Publication date: May 1, 2014Applicant: KYOCERA DOCUMENT SOLUTIONS INC.Inventors: Masami TSUJIHIRO, Yoshio OZAWA
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Publication number: 20140106272Abstract: Provided is a toner having high charging rapidity to reach a sufficient charging amount in a short time, high stability of charging from the initial stage to a time when a large amount of sheets is printed out, and high stability of charging under a high temperature and high humidity. In a toner including toner particles, each of which contains at least a binder resin, a colorant, and a charge controlling resin, the charge controlling resin is a copolymer of a structure A having at least a specific salicylic acid derivative structure and a structure B having sulfonic acid or sulfonic acid ester as a substituent.Type: ApplicationFiled: May 17, 2012Publication date: April 17, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Takashi Kenmoku, Hitoshi Itabashi, Akane Masumoto
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Patent number: 8685603Abstract: An electrostatic charge image developer includes a toner containing an external additive and a carrier comprising a resin-coated layer formed on a surface of a core material. The average shape factor SF1 of the toner is from 125 to 135, the number of particles having shape factor SF1 of less than 125 is from 5% to 30% by number with respect to the total number of toner particles, the number of particles having shape factor SF1 of greater than 135 is from 5% to 30% by number with respect to the total number of toner particles, the scratch line width in a scratch strength test of the resin used in the resin-coated layer is from 80 ?m to 200 ?m, and the scratch depth is from 60 ?m to 150 ?m.Type: GrantFiled: July 2, 2008Date of Patent: April 1, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Fusako Kiyono, Taichi Yamada, Yosuke Tsurumi, Akira Matsumoto, Akihiro Iizuka
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Patent number: 8669033Abstract: Provided is a toner containing toner particles containing a polyester resin which has a structure part represented by Formula (1): wherein, “A” represents a polyester structure unit having at least one linking group; R1 represents a hydrogen atom, or a chlorine atom; R2 represents a hydrogen atom, a chlorine atom, or a methoxy group; and “L” represents a divalent organic group.Type: GrantFiled: March 17, 2011Date of Patent: March 11, 2014Assignee: Konica Minolta Business Technologies, Inc.Inventors: Mikio Kouyama, Ken Ohmura, Kenji Hayashi, Hiroaki Obata, Koji Shibata
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Patent number: 8652720Abstract: Environmentally friendly latex particles are provided which include a gelling agent and a pigment encapsulated in an amorphous resin which may be utilized in forming EA super low melt toners. Methods for providing these resins and toners are also provided.Type: GrantFiled: May 11, 2011Date of Patent: February 18, 2014Assignee: Xerox CorporationInventors: Hadi K. Mahabadi, Ke Zhou, Michelle N. Chretien, Edward Graham Zwartz, Guerino G. Sacripante
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Patent number: 8628899Abstract: There is provided an azo compound for improvement in the dispersibility of an azo pigment into a water-insoluble solvent.Type: GrantFiled: August 23, 2011Date of Patent: January 14, 2014Assignee: Canon Kabushiki KaishaInventors: Masashi Kawamura, Yuki Hasegawa, Masatake Tanaka, Takayuki Toyoda, Kei Inoue, Yasuaki Murai, Masashi Hirose, Takeshi Miyazaki
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Publication number: 20140011130Abstract: To provide a polymeric compound having superior charge-providing properties, the polymeric compound contains at least one unit represented by the following general formula (5). In the general formula (5), R1 represents a hydrogen atom or an alkyl group; R2 to R4 each represent a hydrogen atom, an alkyl group, an alkoxy group, a hydroxyl group or a halogen atom, or R3 and R4 may combine each other to form a ring; and A represents a divalent linking group.Type: ApplicationFiled: March 27, 2012Publication date: January 9, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Kei Inoue, Yasuaki Murai, Ryuji Murayama, Kazuyuki Sato, Soichiro Kawakami, Masashi Hirose
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Publication number: 20140011129Abstract: A polymerizable monomer is provided which is represented by the following formula (1): wherein R1 represents a hydrogen atom or an alkyl group; A represents —CO— or —SO2—; and the moiety represented by the formula (1) is, at the part shown by an asterisk *, linked to a moiety represented by the following formula (2), at any position of a, b, c or d thereof; wherein the sites among a, b, c and d at which the moiety represented by the formula (2) is not linked to the moiety represented by the formula (1) each has a hydrogen atom or a substituent selected from the group consisting of an alkyl group, an alkoxy group and a sulfonic acid group, or any of which may connect at mutually adjoining positions to form a ring.Type: ApplicationFiled: March 27, 2012Publication date: January 9, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Yasuaki Murai, Kei Inoue, Ryuji Murayama, Kazuyuki Sato, Masashi Hirose
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Publication number: 20130295501Abstract: Disclosed herein is a method of making a modified pigment, comprising: reacting, under Mitsunobu conditions: (a) a first reactant comprising a protonated nucleophile having a pKa<15, and (b) a second reactant comprising a hydroxyl-containing organic group, wherein a pigment is attached to either the first or second reactant. The method further comprises forming the modified pigment having attached an organic species comprising the nucleophile bonded to the organic group, with the net elimination of a proton and a hydroxyl. Also disclosed herein are modified pigments, which can have applications in chemical toners, inkjet ink and electrophoretic ink compositions, black matrix materials, color filters, and coatings.Type: ApplicationFiled: March 12, 2013Publication date: November 7, 2013Applicant: CABOT CORPORATIONInventors: Qingling Zhang, Lynne K. LaRochelle Richard
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Publication number: 20130244153Abstract: A development agent containing toner that contains a binder resin having a crystalline resin that has a urethane and/or urea bond in its main chain, a coloring agent, and an organically modified inorganic laminate compound in which organic ions are at least partially substituted for ions present between layers of the organically modified inorganic laminate compound, and toner carrier that contains a core material whose surface is coated with a coating layer having a condensed compound of a melamine resin and/or a guanamine resin and an acrylic resin having a hydroxyl group.Type: ApplicationFiled: March 4, 2013Publication date: September 19, 2013Inventors: Shinya NAKAYAMA, Atsushi Yamamoto, Yukiko Nakajima, Masahide Yamada, Hideyuki Santo, Suzuka Amemori
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Publication number: 20130244165Abstract: A toner is provided that, even in a small amount thereof, gives a satisfactory image density and that is free of image problems, e.g., fogging and offset resistance, even during long-term use and in a high-temperature, high-humidity environment. The toner contains a binder resin, a pigment, and a prescribed azo compound wherein, designating as (A) the solubility of the azo compound in a toluene-hexane solubility test and as (B) the solubility of the binder resin constituting the toner in the toluene-hexane solubility test, the (A) and the (B) satisfy the relationship |(B)?(A)|?60.Type: ApplicationFiled: February 26, 2013Publication date: September 19, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Yasuhiro Hashimoto, Takayuki Toyoda, Masashi Kawamura, Naotaka Ikeda, Hidekazu Fumita, Emi Watanabe, Yuhei Terui
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Publication number: 20130224644Abstract: A toner comprising toner particles, each of which contains a binder resin, a compound in which a polymer portion is bound to an azo skeleton structure are linked, and carbon black.Type: ApplicationFiled: February 26, 2013Publication date: August 29, 2013Applicant: CANON KABUSHIKI KAISHAInventor: Canon Kabushiki Kaisha
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Publication number: 20130224645Abstract: A toner comprising toner particles, each of which contains a binder resin, a compound in which a polymer portion is bound to an azo skeleton structure, and a magenta pigment.Type: ApplicationFiled: February 26, 2013Publication date: August 29, 2013Applicant: CANON KABUSHIKI KAISHAInventor: CANON KABUSHIKI KAISHA
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Publication number: 20130224647Abstract: Provided is a toner manufactured in an aqueous solvent, whereby a satisfactory image density can be obtained and the toner laid-on level on a recording medium can be reduced with a normal added concentration of pigment without adding a large quantity of pigment to the toner. The toner is manufactured in an aqueous medium by the suspension polymerization or dissolution suspension method and contains a binder resin, a pigment and an azo compound. The azo compound is a specific azo compound, and the absolute value of the difference in zeta potential between the binder resin and the azo compound is 25 mV or less.Type: ApplicationFiled: February 26, 2013Publication date: August 29, 2013Applicant: CANON KABUSHIKI KAISHAInventor: CANON KABUSHIKI KAISHA
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Publication number: 20130224646Abstract: A cyan toner comprising toner particles, each of which contains a binder resin, a compound in which a polymer portion is bound to an azo skeleton structure, and a phthalocyanine pigment serving as a colorant.Type: ApplicationFiled: February 26, 2013Publication date: August 29, 2013Applicant: CANON KABUSHIKI KAISHAInventor: CANON KABUSHIKI KAISHA
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Patent number: 8486596Abstract: A toner produced by a method including dissolving or dispersing toner components comprising a colorant and at least one of a binder resin and a precursor thereof in an organic solvent to prepare a toner components liquid, dispersing the toner components liquid in an aqueous medium including a surfactant, a particulate resin A having the same polarity as the surfactant and a volume average particle diameter of from 5 to 50 nm, and a particulate resin B having a volume average particle diameter of from 10 to 500 nm to form liquid droplets, and removing the organic solvent from the liquid droplets. The particulate resin B is incompatible with the binder resin and swells in the organic solvent.Type: GrantFiled: June 26, 2009Date of Patent: July 16, 2013Assignee: Ricoh Company, LimitedInventors: Masaki Watanabe, Hiroshi Yamashita, Tsuyoshi Sugimoto, Naohiro Watanabe, Shinichi Wakamatsu
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Publication number: 20130130164Abstract: Provided is a pigment dispersant for improving the dispersibility of an azo pigment for a water-insoluble solvent. More specifically, provided is a polyester, including at least one unit represented by one of the following formula (1) and the following formula (2): in the formula (1) and the formula (2): R1 represents an alkyl group having 1 to 6 carbon atoms or a phenyl group; R2 to R6 each represent a hydrogen atom, a COOR7 group, or a CONR8R9 group, provided that at least one of the R2 to R6 represents the COOR7 group or the CONR8R9 group; and the R7 to R9 each represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms.Type: ApplicationFiled: August 18, 2011Publication date: May 23, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Yasuaki Murai, Masashi Kawamura, Masatake Tanaka, Takayuki Toyoda, Yuki Hasegawa, Masashi Hirose, Takeshi Miyazaki
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Patent number: 8304157Abstract: A toner for an electrophotography and its manufacturing method are disclosed. The toner comprises toner particles containing a cross-linked polymer having two-valent crosslinking group represented by Formula (1), wherein, R1 is a hydrogen atom or a chlorine atom, R2 is a hydrogen atom, a chlorine atom or a methoxy group. The toner satisfies storage durability against heat as well as sufficient low temperature fixing ability.Type: GrantFiled: June 10, 2010Date of Patent: November 6, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Mikio Kouyama, Ken Ohmura, Kenji Hayashi, Yukio Hosoya, Hiroaki Obata, Koji Shibata
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Patent number: 8298738Abstract: A positively-chargeable toner for developing electrostatic images which can prevent damage of photosensitive members and filming due to an external additive, can impart a stable charge property and flowability to toner particles over time, and thus hardly causes deterioration of image quality due to fog, blur, white streaks or the like, and therefore is excellent in printing durability even if continuous printing of plural prints is performed is provided. A positively-chargeable toner for developing electrostatic images of the present invention is a positively-chargeable toner for developing electrostatic images comprising colored resin particles containing a colorant and a binder resin, and an external additive, wherein the external additive contains magnesium silicate having negatively charging ability, with a Mohs hardness of 3 or less and a number average primary particle diameter in the range from 1 to 15 ?m.Type: GrantFiled: February 27, 2008Date of Patent: October 30, 2012Assignee: Zeon CorporationInventor: Osamu Ieda
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Publication number: 20120251938Abstract: A method for producing colored resin particles including: dissolving or dispersing at least binder resin and colorant in organic solvent to prepare oil phase; dissolving resin A and basic compound in aqueous medium to prepare aqueous phase, the resin A having solubility <2.0 g/100 g water having temperature 25° C. and pH 3.0 and solubility ?2.0 g/100 g water having temperature 25° C. and pH 10.0; dispersing the oil phase in the aqueous phase to prepare core particle dispersion liquid; dispersing resin particles in aqueous medium to prepare resin particle dispersion liquid, and adding the resin particle dispersion liquid to the core particle dispersion liquid so that the resin particles are attached onto the core particles, to prepare dispersion liquid containing particles each having the core particle and the resin particles attached thereonto; removing the organic solvent from the dispersion liquid; washing the particles; and drying the particles.Type: ApplicationFiled: February 1, 2012Publication date: October 4, 2012Inventors: Atsushi Yamamoto, Takuya Kadota, Yoshihiro Mikuriya, Tsuyoshi Nozaki, Yoshimichi Ishikawa, Kazuoki Fuwa, Tomohiro Fukao, Tomoharu Miki
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Patent number: 8268524Abstract: A black toner includes: toner mother particles containing carbon black as a colorant and a binder resin, the toner mother particles being surface-modified with a polyalkyleneimine.Type: GrantFiled: June 30, 2009Date of Patent: September 18, 2012Assignee: Seiko Epson CorporationInventors: Masahiro Oki, Yoshihiro Ueno
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Patent number: 8252493Abstract: Single component toners are provided with at least one surface additive including a large polymeric spacer, and processes for producing the same. In embodiments, the toner is a non-magnetic single component toner produced by emulsion aggregation methods. The large polymeric spacer additives provide excellent flow characteristics to the resulting toners, and reduce the incidence of clogging failure and print defects such as ghosting, white bands, and low toner density compared with conventionally produced toners.Type: GrantFiled: October 15, 2008Date of Patent: August 28, 2012Assignee: Xerox CorporationInventors: Samir Kumar, Grazyna L. Kmiecik-Lawrynowicz, Maura A. Sweeney, Michael L. Grande, Julie C. Pickering, Timothy L. Lincoln
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Publication number: 20120189953Abstract: Domains of a charge control resin are formed by dispersing a charge control resin containing a quaternary ammonium salt functional group-containing resin of a copolymer of an addition-polymerizable monomer having a quaternary ammonium salt functional group and a styrene and/or acrylic monomer into a polyester resin as binder resin, and the proportion of the number of domains of the charge control resin with a domain diameter of no less than 0.01 ?m to less than 0.3 ?m versus the number of domains of the charge control resin with a domain diameter of no less than 0.01 ?m, which is measured by a predetermined method, is adjusted to no less than 98% by number.Type: ApplicationFiled: January 24, 2012Publication date: July 26, 2012Applicant: KYOCERA MITA CORPORATIONInventors: Masami TUJIHIRO, Toshiki TAKEMORI
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Polymer having a sulfonic group or a sulfonate group and an amide group and method of producing same
Patent number: 8178271Abstract: A polymer is provided in which a sulfonic group or a derivative thereof is introduced. The polymer includes a unit represented by the following chemical formula (1): wherein R represents -A1-SO2R1; A1 is selected from an alkylene group, a heterocyclic ring, an aromatic ring; and —SO2R1 is a sulfonic group or of a derivative of a sulfonic acid.Type: GrantFiled: May 20, 2010Date of Patent: May 15, 2012Assignee: Canon Kabushiki KaishaInventors: Tatsuki Fukui, Takashi Kenmoku, Ako Kusakari, Chieko Mihara, Tetsuya Yano, Norikazu Fujimoto -
Publication number: 20120021347Abstract: To provide a toner A containing: base particles, each containing polyester, microcrystalline wax, and a colorant; and spherical silica particles having an average primary particle diameter of 100 nm to 150 nm, wherein the microcrystalline wax has an onset temperature of 45° C. to 60° C. as determined by DSC, and a carbon number distribution of 25 to 55.Type: ApplicationFiled: July 22, 2011Publication date: January 26, 2012Inventors: Naohito Shimota, Takahiro Honda, Tsuneyasu Nagatomo, Ryuta Chiba
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Publication number: 20110294060Abstract: To provide a toner for developing an electrostatic charge image, which is free from fogging even by means of a high speed and long operating life machine and which brings about no OPC filming or soiling of components. A toner for developing an electrostatic charge image, which contains at least a binder resin and a colorant, wherein the toner has silica particles satisfying at least the following (1) to (3) and particles having an electrostatic property antipolar to the silica particles: (1) the average primary particle diameter is at least 60 nm and at most 300 nm, (2) the moisture content is at most 1.0 mass %, and (3) the absolute specific gravity is at least 2.0 and at most 2.4.Type: ApplicationFiled: May 25, 2011Publication date: December 1, 2011Applicant: MITSUBISHI CHEMICAL CORPORATIONInventor: Shiro YASUTOMI
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Publication number: 20110294059Abstract: Disclosed is a toner comprising at least a binder resin, a colorant and a polyurethane resin, wherein the polyurethane resin is a carboxy-denatured polyurethane resin.Type: ApplicationFiled: May 23, 2011Publication date: December 1, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Kentarou MOGI, Noboru UEDA, Hiroyuki KOZURU
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Patent number: 8067140Abstract: A toner for developing electrostatic image which has a reduced residual amount of a decomposed product of a polymerization initiator remaining in the toner upon production (mainly an ether component) and an unreacted polymerizable monomer (mainly styrene), less odor produced upon fixing so as to avoid deteriorating surrounding environment, an excellent shelf stability at high temperature upon storing or anti-blocking property, and an excellent printing durability under both N/N environment and H/H environment upon printing is provided. A toner for developing electrostatic image comprising a colored resin particle which is obtained by polymerizing a polymerizable monomer composition containing a polymerizable monomer, a colorant and a charge control resin in an aqueous dispersion medium in the presence of a polymerization initiator, wherein the charge control resin is a quaternary ammonium base containing copolymer having a glass transition temperature “Tg” in the range from 70 to 100° C.Type: GrantFiled: January 30, 2008Date of Patent: November 29, 2011Assignee: Zeon CorporationInventor: Keita Sensui