Organic Heavy Metal, Aluminum, Or Silicon Compound Adjuvant Patents (Class 430/108.3)
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Patent number: 8927186Abstract: A toner for use in developing an electrostatic latent image is provided. The toner includes a colored particulate material including at least a binder resin and a colorant; and an external additive present on a surface of the colored particulate material and including a particulate crystalline hydroxyapatite. The particulate crystalline hydroxyapatite has an average aspect ratio of not less than 3 and less than 30.Type: GrantFiled: November 23, 2010Date of Patent: January 6, 2015Assignee: Ricoh Company, LimitedInventors: Masayuki Ishii, Toyoshi Sawada
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Publication number: 20140377696Abstract: A toner comprising toner particles which comprise a binder resin and a colorant, and also inorganic fine particles as external additives, wherein the inorganic fine particles are silica fine particles and a group 2 element titanate fine particles, the inorganic fine particles have specific particle diameters, the silica fine particles have a coverage ratio X1 on the surfaces of the toner particles, which is not less than 40.0 surface area % and not more than 75.0 surface area %, when the theoretical coverage ratio by the silica fine particles is X2, the diffusion index defined as “diffusion index=X1/X2” satisfies the condition: diffusion index??0.0042×X1+0.62, and the external additives have an embedding ratio on the toner particles, which satisfies a specific range.Type: ApplicationFiled: June 13, 2014Publication date: December 25, 2014Inventors: Yusuke Hasegawa, Takashi Matsui, Shuichi Hiroko, Yoshitaka Suzumura, Atsuhiko Ohmori, Keisuke Tanaka
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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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Publication number: 20140370429Abstract: The instant disclosure describes methacrylate coated carrier resins with hydrophobic substituents for charge control and improved RH sensitivity.Type: ApplicationFiled: June 14, 2013Publication date: December 18, 2014Inventors: Richard PN Veregin, Qingbin Li, Andriy Kovalenko, Sergey Gusarov, Daryl W. Vanbesien, Michael S. Hawkins
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Publication number: 20140370433Abstract: This disclosure relates to a polymerized toner prepared by suspension polymerization. Particularly, this disclosure relates to a polymerized toner that comprises a binder resin, and a pigment, a charge control agent, and wax, which are dispersed in the binder resin, and maintains peak molecular weight (Mn) of the binder resin, the ratio of number average molecular weight/peak molecular weight (Mn/Mp), and gel content (Gel %), and thereby, can realize high glossiness and excellent off set property when printing, and a method for preparing the same.Type: ApplicationFiled: December 5, 2012Publication date: December 18, 2014Applicant: LG CHEM, LTD.Inventors: Wook Jang, Chang-Soon Lee, Joo-Yong Park, Woo-Cheul Jung
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Publication number: 20140356774Abstract: A toner including: a core particle containing at least a binder resin, a colorant and a releasing agent; and a shell on a surface of the core particle, wherein the toner gives a supernatant having a transmittance of 50% to 95% with respect to light having a wavelength of 800 nm, where the supernatant is formed after 3 g of the toner is added to 40 g of ion-exchange water containing 0.5% by mass of sodium dodecyl sulfate, followed by stirring for 90 min and by irradiating with ultrasonic waves of 20 kHz and 80 W for 5 min, and a liquid containing the toner dispersed therein is centrifugated at 3,000 rpm for 5 min.Type: ApplicationFiled: September 12, 2012Publication date: December 4, 2014Inventors: Tomoharu Miki, Takuya Kadota, Yoshihiro Mikuriya, Tsuyoshi Nozaki, Yoshimichi Ishikawa, Kazuoki Fuwa, Tomohiro Fukao
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Publication number: 20140356777Abstract: A toner having good low-temperature fixability, charge stability, environmental stability, and durability and capable of stably producing high-quality images for a long time is provided. The toner includes a toner particle having a core-shell structure constituted of a core and a shell phase. The core contains a binder resin, a colorant, and wax, and the shell phase contains a resin A. The resin A is a comb polymer including a main chain portion (X), a side chain portion (Y), and a side chain portion (Z). The main chain portion (X) is a vinyl polymer, the side chain portion (Y) has an aliphatic polyester structure and has an ester group concentration of a polyester segment of 6.5 mmol/g or less, and the side chain portion (Z) has an organic polysiloxane structure and has an average number of Si—O bond repeating units of a siloxane segment of 2 or more and 100 or less.Type: ApplicationFiled: November 28, 2012Publication date: December 4, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Atsushi Tani, Toshifumi Mori, Takaaki Kaya, Tetsuya Kinumatsu, Kenji Aoki, Shuntaro Watanabe, Yoshihiro Nakagawa, Takashige Kasuya
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Publication number: 20140356776Abstract: A toner particle includes a core including at least one resin, optionally a wax, and a colorant, and a shell comprising at least one charge control agent. The core is substantially free of the charge control agent. The toner particle has improved charging performance compared with core-shell toner particles having the charge control agent in the core of the toner particle.Type: ApplicationFiled: May 31, 2013Publication date: December 4, 2014Inventors: ROBERT D. BAYLEY, MAURA A. SWEENEY, GRAZYNA E. KMIECIK-LAWRYNOWICZ, SHIGANG STEVEN QIU, TIE HWEE NG
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Publication number: 20140356775Abstract: The disclosure relates generally to toner additives, and in particular, toner additives that provide reduced impaction within a toner particle and improved adhesion to the toner particle. The toner additives include alumina nanotubes, and may be used with other non-conventional additives such as silica nanotubes and titania nanotubes.Type: ApplicationFiled: May 28, 2013Publication date: December 4, 2014Inventors: Richard P.N. Veregin, Padam K. Angra
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Publication number: 20140349228Abstract: A toner for electrostatic latent image development of the present invention includes toner particles containing toner mother particles and an external additive. The external additive contains fatty acid metal salt particles, and a volume based particle diameter (size) distribution of the fatty acid metal salt particles has two peaks on a side of smaller size and a side of larger size, respectively. A volume based mean particle diameter of the fatty acid metal salt particles having the peak on the side of smaller size is 3.0 ?m or smaller and a volume based mean particle diameter of the fatty acid metal salt particles having the peak on the side of larger size is larger than a volume based mean particle diameter of the toner mother particles.Type: ApplicationFiled: May 22, 2014Publication date: November 27, 2014Applicant: Konica Minolta, Inc.Inventors: Futoshi KADONOME, Yukio HOSOYA, Kazue NAKAMURA, Saburou HIRAOKA, Yasuko UCHINO
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Publication number: 20140348539Abstract: A brilliant toner includes toner particles which at least contain a brilliant pigment, a binder resin, and a release agent; and an external additive, wherein a ratio (X/Y) of a specific surface area X (m2/g), calculated from a projected image of the toner particles, to a BET specific surface area Y (m2/g) of the toner particles is from 0.3 to 1.0.Type: ApplicationFiled: August 11, 2014Publication date: November 27, 2014Applicant: FUJI XEROX CO., LTD.Inventors: Shotaro TAKAHASHI, Masaru TAKAHASHI, Sakiko HIRAI, Atsushi SUGITATE, Shuji SATO
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Publication number: 20140342278Abstract: A magnetic toner includes: magnetic toner particles containing a binder resin and a magnetic body; and inorganic fine particles that are present on the surface of the magnetic toner particles and are not a magnetic iron oxide and magnetic iron oxide particles that are present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles; when a coverage ratio A (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles and a coverage ratio B (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles thType: ApplicationFiled: January 31, 2013Publication date: November 20, 2014Inventors: Tomohisa Sano, Michihisa Magome, Yusuke Hasegawa, Atsuhiko Ohmori
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Publication number: 20140342277Abstract: The magnetic toner contains: magnetic toner particles containing a binder resin and a magnetic body; and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles comprise strontium titanate fine particles and metal oxide fine particles, and the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles. In addition, the magnetic toner has a characteristic state of coverage, by the inorganic fine particles, of the magnetic toner particle surface, and the ratio [D4/D1] of the weight-average particle diameter (D4) to the number-average particle diameter (D1) is in a prescribed range.Type: ApplicationFiled: January 31, 2013Publication date: November 20, 2014Inventors: Atsuhiko Ohmori, Michihisa Magome, Yusuke Hasegawa, Keisuke Tanaka
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Publication number: 20140342279Abstract: A method for making polymer-encapsulated metallic ink particles is disclosed herein. An ethylene-based polymeric resin powder is formed, and is mixed with a metallic pigment powder to form a powder mixture. The powder mixture is melted to form a metallic polymer melt. A non-polar carrier is added to the metallic polymer melt to form a slurry. The slurry is processed in a microfluidizer.Type: ApplicationFiled: January 5, 2012Publication date: November 20, 2014Inventors: Doris Chun, Hou T. Ng, Albert Teishev
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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: 8889329Abstract: The disclosure relates generally to toner additives, and in particular, toner additives that provide reduced impaction within a toner particle and improved adhesion to the toner particle. The toner additives include alumina nanotubes, and may be used with other non-conventional additives such as silica nanotubes and titania nanotubes.Type: GrantFiled: May 28, 2013Date of Patent: November 18, 2014Assignee: Xerox CorporationInventors: Richard P. N. Veregin, Padam K. Angra
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Publication number: 20140335450Abstract: A magnetic toner is provided that exhibits an excellent electrostatic offset resistance both initially and after long-term use. The magnetic toner contains: magnetic toner particles containing a binder resin and a magnetic body; and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain a prescribed metal oxide fine particle in a prescribed proportion; the magnetic toner has prescribed numerical value ranges for a coverage ratio A of the magnetic toner particle surface covered by the inorganic fine particles and for a coverage ratio B by the inorganic fine particles that are fixed to the magnetic toner particle surface; the magnetic toner particle contains a crystalline polyester; and measurement of the magnetic toner with a differential scanning calorimeter provides a characteristic differential scanning calorimetric curve.Type: ApplicationFiled: January 31, 2013Publication date: November 13, 2014Inventors: Shotaro Nomura, Michihisa Magome, Yusuke Hasegawa, Takashi Matsui
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Publication number: 20140335449Abstract: A magnetic toner including: magnetic toner particles containing a binder resin, a magnetic body, and a release agent; and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, wherein the magnetic toner has a coverage ratio A of the magnetic toner particles' surface by the inorganic fine particles and a coverage ratio B of the magnetic toner particles' surface by the inorganic fine particles fixed to the magnetic toner particles' surface that reside in prescribed numerical value ranges; the binder resin contains a styrene resin; the reType: ApplicationFiled: January 31, 2013Publication date: November 13, 2014Inventors: Kozue Uratani, Michihisa Magome, Yusuke Hasegawa, Shuichi Hiroko
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Patent number: 8877416Abstract: A toner includes a binder resin, a colorant, and a benzilic acid compound. The binder resin contains a polyester resin A obtained by subjecting aromatic dicarboxylic acid, rosin and trivalent or higher-valent alcohol as starting materials to polycondensation, a content of the rosin in a sum of the starting materials being 60% by weight or more, and a polyester resin B obtained by subjecting aromatic dicarboxylic acid and polyhydric alcohol as starting materials to polycondensation.Type: GrantFiled: June 9, 2011Date of Patent: November 4, 2014Assignee: Sharp Kabushiki KaishaInventors: Satoru Ariyoshi, Yasuhiro Shibai, Katsuru Matsumoto, Nobuhiro Maezawa
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Publication number: 20140322640Abstract: A magnetic toner containing: magnetic toner particles containing a binder resin and a magnetic body; and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain silica fine particles and alumina fine particles and/or titania fine particles; a coverage ratio A of the magnetic toner particles' surface by the inorganic fine particles each of which has a particle diameter of from 5 nm to not more than 50 nm and a coverage ratio B of the magnetic toner particles' surface by the inorganic fine particles each of which has a particle diameter of from at least 5 nm to not more than 50 nm and is fixed to the magnetic toner particles' surface, have prescribed values and a prescribed relationship in the magnetic toner; and alumina fine particles and/or titania fine particles each of which has a particle diameter of from at least 100 nm to not more than 800 nm is present on the surface of the magnetType: ApplicationFiled: January 31, 2013Publication date: October 30, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Keisuke Tanaka, Michihisa Magome, Yusuke Hasegawa, Tomohisa Sano
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Publication number: 20140322639Abstract: A magnetic toner contains magnetic toner particles containing a binder resin, a release agent, and a magnetic body and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, the coverage ratio of the magnetic toner particles' surface by the inorganic fine particles and the coverage ratio by the inorganic fine particles fixed to the magnetic toner particles' surface reside in a prescribed relationship, the binder resin contains a polyester resin, the release agent contains an ester compound, and an endothermic peak for the magnetic tonerType: ApplicationFiled: December 26, 2012Publication date: October 30, 2014Inventors: Yoshitaka Suzumura, Yusuke Hasegawa, Michihisa Magome, Kozue Uratani
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Publication number: 20140315126Abstract: The magnetic toner includes magnetic toner particles comprising a binder resin and a magnetic body and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles comprise metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, wherein; when a coverage ratio A (%) is a coverage ratio of the magnetic toner particle's surface by the inorganic fine particles and a coverage ratio B (%) is a coverage ratio of the magnetic toner particle' surface by the inorganic fine particles that are fixed to the magnetic toner particle's surface, the magnetic toner has a coverage ratio A, a coefficient of variation on theType: ApplicationFiled: December 26, 2012Publication date: October 23, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Michihisa Magome, Tadashi Dojo, Yusuke Hasegawa
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Publication number: 20140315125Abstract: The magnetic toner contains magnetic toner particles containing a binder resin and a magnetic body, and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles comprise metal oxide fine particles, wherein the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles. In addition, the coverage ratio of the magnetic toner particle surface by the inorganic fine particles resides in a prescribed range for this magnetic toner; the binder resin is a styrene resin; the weight-average molecular weight and radius of gyration of the magnetic toner reside in a prescribed relationship; and the viscosity of the magnetic toner at 110° C.Type: ApplicationFiled: December 26, 2012Publication date: October 23, 2014Inventors: Takashi Matsui, Yusuke Hasegawa, Shotaro Nomura, Michihisa Magome
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Publication number: 20140308608Abstract: The present disclosure describes toner additive packages comprising two or more colloidal silicas.Type: ApplicationFiled: April 15, 2013Publication date: October 16, 2014Inventor: Xerox Corporation
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Publication number: 20140302433Abstract: A magnetic toner contains magnetic toner particles containing a binder resin and a magnetic body, and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, when a coverage ratio A (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles and a coverage ratio B (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles that are fixed to the magnetic toner particles' surface, the magnetic toner has a coverage ratio A and a coverage ratio B/coverage ratio A in prType: ApplicationFiled: December 26, 2012Publication date: October 9, 2014Inventors: Yusuke Hasegawa, Tadashi Dojo, Michihisa Magome
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Patent number: 8852836Abstract: A toner including: a base resin; and charge-controlling resin particles contained in the base resin, wherein the toner is in shape of particles, and the charge-controlling resin particles are present in a region of each toner particle which is 500 nm in depth from a surface of the toner particle and an average of amounts of the charge-controlling resin particles present in the regions of the toner particles is 20% by volume to 70% by volume, wherein an average of embedment rates of the charge-controlling resin particles in the toner particles is 90% or higher, where each embedment rate is an average of embedment rates of the charge-controlling resin particles in each toner particle, and wherein the charge-controlling resin particles have a charge amount of 60 ?C/m2 or more as measured by a blow-off method.Type: GrantFiled: June 18, 2012Date of Patent: October 7, 2014Assignee: Ricoh Company, Ltd.Inventors: Masahiro Seki, Yoshitaka Sekiguchi, Ryota Inoue, Kazuoki Fuwa
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Patent number: 8852837Abstract: A toner includes toner base particles containing at least a binder resin, a coloring agent, and a release agent; and alumina fine particles whose phase angle (?) is |80°| or less at an alternating current frequency of 1 to 10 kHz in an alternating current impedance method.Type: GrantFiled: April 9, 2010Date of Patent: October 7, 2014Assignee: Seiko Epson CorporationInventors: Hideki Okada, Tomotaka Mori, Tomohiro Aruga
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Publication number: 20140295340Abstract: An electrostatic charge image developing toner includes toner particles and silica particles that have a titanium content of from 0.001% by weight to 10% by weight in a surface layer, an average particle diameter of from 30 nm to 500 nm, and a particle size distribution index of from 1.1 to 1.5, and are surface-treated with a titanium compound in which an organic group is bonded to a titanium atom via an oxygen atom, and a hydrophobizing agent in sequence.Type: ApplicationFiled: July 25, 2013Publication date: October 2, 2014Applicant: FUJI XEROX CO., LTD.Inventors: Yoshifumi IIDA, Takeshi IWANAGA, Yuka ZENITANI, Yasunobu KASHIMA, Chika HAMA
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Patent number: 8846965Abstract: Disclosed is a toner for electrophotography, which has good hue, good light resistance and good electrostatic charge, and is capable of providing images that are free from white spots. The toner for electrophotography exhibits a good performance. Specifically disclosed is a toner for electrophotography, which is characterized by containing at least one metal-containing compound that is represented by general formula (1). (In the formula, R1 represents an alkyl group; R2 represents a hydrogen atom, an alkoxycarbonyl group, an aryloxycarbonyl group, a sulfamoyl group, a sulfinyl group, an alkylsulfonyl group, an arylsulfonyl group, an acyl group, a halogen atom or a cyano group; and R3 represents a group that has 9 or more carbon atoms and an aromatic hydrocarbon structure.Type: GrantFiled: June 4, 2010Date of Patent: September 30, 2014Assignee: Konica Minolta Business Technologies, Inc.Inventors: Kimihiko Ookubo, Keiko Ishidai, Issei Nakahara
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Patent number: 8822119Abstract: A two-component developer including at least a toner and a carrier. The toner includes a coloring particle prepared by agglutinating and fusing a resin particle having colorants and a resin particle having wax, and 0.2-2.0 wt. % hydrophobic silica and 0.01-1.0 wt. % a hydrotalcite-like compound as external additives. A shape coefficient of the toner is 0.93-0.99. The carrier includes at least a magnetic particle coated with a silicone resin layer, with a volume average particle diameter of 20-100 ?m.Type: GrantFiled: July 8, 2011Date of Patent: September 2, 2014Assignee: Hubei Dinglong Chemical Co., Ltd.Inventors: Shunquan Zhu, Yubin Wang
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Publication number: 20140234766Abstract: A toner T1 develops an electrostatic latent image, the toner T1 having relieved charge-up characteristics, improved development characteristics, and improved transfer characteristics. The toner T1 may ensure high charge stability against environmental condition changes, and an appropriate amount of charges at a high printing speed, may reduce background contamination on a photoreceptor, may prevent undesirable fusing onto a blade even after prolonged printing, and may have high transfer efficiency and high image uniformity. The toner T1 may have effective flowability and transportability, and may have good storage stability, so as to be unlikely to cause blocking when stored for an extended time.Type: ApplicationFiled: January 29, 2014Publication date: August 21, 2014Applicant: SAMSUNG Electronics Co., Ltd.Inventors: Se-young YOON, Sung-jin PARK, Seung-sik WOO, Hae-ree JOO
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Patent number: 8795938Abstract: To provide a toner, which contains: toner base particles each containing a binder resin and a colorant; and an external additive containing inorganic particles and fatty acid metal salt particles, wherein the inorganic particles contain at least hydrophobic silica particles, wherein a liberation ratio Ya of the hydrophobic silica particles from the toner is 1% by mass to 20% by mass, and wherein a libration ratio Yb of the fatty acid metal salt particles from the toner is 30% by mass to 90% by mass.Type: GrantFiled: January 17, 2013Date of Patent: August 5, 2014Assignee: Ricoh Company, Ltd.Inventors: Osamu Uchinokura, Tomoyuki Satoh, Takahiro Honda, Daisuke Inoue, Mamoru Hozumi
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Publication number: 20140205943Abstract: Since a charge amount of a toner and a charge rise characteristic thereof are liable to be influenced by the change in temperature and humidity condition, the change in image density occurs in printing, and in particular, in high temperature and high humidity environment, inconveniences, such as image fogging, occur due to non-uniformity of the charge amount distribution. In a toner including toner particles obtained by dispersing a monomer composition containing a polymerizable monomer and a colorant in an aqueous medium to form droplets and polymerizing the polymerizable monomer in the droplets, the toner particles contain a polymer formed by a polymerization reaction of the polymerizable monomer and a metal compound having a vinyl group.Type: ApplicationFiled: September 5, 2012Publication date: July 24, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Takashi Kenmoku, Hitoshi Itabashi, Akane Masumoto
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Publication number: 20140205942Abstract: The disclosure relates generally to toner additives, and in particular, toner additives that provide desired higher and stable toner charge. The toner additives comprise silica nanotubes in combination with or in place of the commonly used silica or titania particulate additives.Type: ApplicationFiled: January 18, 2013Publication date: July 24, 2014Applicant: XEROX CORPORATIONInventors: PADAM K. ANGRA, Richard P. Veregin
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Patent number: 8785093Abstract: An image forming toner, including a mother particle including a paraffin wax having a melting point of from 60 to 90° C. and a binder resin, wherein the mother particle has an endothermic peak of the paraffin wax of from 2.0 J/g to 5.5 J/g when measured by a DSC and an aspect ratio of from 0.8 to 0.90.Type: GrantFiled: October 29, 2008Date of Patent: July 22, 2014Assignee: Ricoh Company, Ltd.Inventors: Toyoshi Sawada, Tomomi Suzuki, Tsuneyasu Nagatomo, Satoshi Kojima
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Patent number: 8785094Abstract: An electrostatic latent image developing toner contains toner particles that contain a binder resin and a pigment; and an external additive that contains inorganic particles, a ratio (C/D) of an average maximum thickness C to an average equivalent circle diameter D in the toner particles is from 0.05 to 0.7, the inorganic particles include silicone oil-treated inorganic particles in which the amount of free silicone oil with respect to the inorganic particles is from 0.1% by weight to 10% by weight, and the amount of the silicone oil-treated inorganic particles added with respect to 100 parts by weight of the toner particles is from 0.1 part by weight to 10 parts by weight.Type: GrantFiled: August 1, 2012Date of Patent: July 22, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Shuji Sato, Atsushi Sugitate, Masaru Takahashi, Shotaro Takahashi
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Patent number: 8778583Abstract: A toner including a mother particle and an external additive covering a surface of the mother particle is provided. The mother particle includes a binder resin, a colorant, and a release agent. The external additive includes a particulate cellulose having a number average particle diameter within a range of 15 to 105 nm.Type: GrantFiled: November 16, 2012Date of Patent: July 15, 2014Assignee: Ricoh Company, Ltd.Inventors: Masayuki Ishii, Toyoshi Sawada
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Publication number: 20140186761Abstract: A toner having good development durability, storage stability, environmental stability, and low-temperature fixability is provided. The toner contains toner particles each including a surface layer that contains an organic silicon polymer. The organic silicon polymer contains a specific unit. In a chart obtained by 29Si-NMR measurement of THF insoluble components of the toner particles, the ratio of a peak area attributable to a specific structure to the total peak area of the organic silicon polymer is 0.40 or more.Type: ApplicationFiled: December 26, 2013Publication date: July 3, 2014Inventors: Koji Abe, Naoya Isono, Taiji Katsura, Yuhei Terui, Katsuyuki Nonaka
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Publication number: 20140186760Abstract: A toner having good development durability, storage stability, environmental stability, and low-temperature fixability is provided. The toner contains toner particles each including a surface layer that contains an organic silicon polymer. The organic silicon polymer contains a unit having a specific structure. The average thickness Dav. of the surface layers is a specific value and the silicon concentration determined by ESCA is 2.5% or more. The toner has a shape factor SF-2 of 140 or more and 260 or less and an average circularity of 0.970 or more and 0.990 or less.Type: ApplicationFiled: December 26, 2013Publication date: July 3, 2014Inventors: Shintaro Kawaguchi, Katsuyuki Nonaka, Koji Abe, Naoya Isono, Yuhei Terui, Taiji Katsura, Akira Sugiyama
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Patent number: 8715897Abstract: The present disclosure provides polyesters suitable for use in forming toners. In embodiments, a polyester may be subjected to phase inversion emulsification, in which charge control agents are added so that the polyester emulsion includes charge control agents therein. The resulting polyester emulsion with charge control agents may then be utilized to form toner particles.Type: GrantFiled: November 16, 2009Date of Patent: May 6, 2014Assignee: Xerox CorporationInventors: Robert D. Bayley, Yuhua Tong, Timothy L. Lincoln, Grazyna Kmiecik-Lawrynowicz, Maura A. Sweeney
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Patent number: 8703374Abstract: Toner particles include a shell and a core, wherein the shell includes charge control agent-treated spacer particles that cause protrusions from the toner particle surface.Type: GrantFiled: March 9, 2012Date of Patent: April 22, 2014Assignee: Xerox CorporationInventors: Maura A. Sweeney, Robert D. Bayley, Grazyna E. Kmiecik-Lawrynowicz, Anne Marie Sweeney-Jones
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Publication number: 20140106270Abstract: A transparent electrostatic charge image developing toner includes a binder resin and a compound represented by the following Formula (1): wherein in Formula (1), R1 represents a methyl group or a trifluoromethyl group; R2 represents a hydrogen atom; R3 represents a methyl group, a trifluoromethyl group, a t-butyl group, a phenyl group, or a naphthyl group; and M represents a rare earth element.Type: ApplicationFiled: May 2, 2013Publication date: April 17, 2014Applicant: FUJI XEROX CO., LTD.Inventors: Yuki TAKAMIYA, Tsuyoshi MURAKAMI, Eisuke IWAZAKI, Satoshi INOUE
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Patent number: 8697323Abstract: A toner composition including toner particles that have a resin, an optional wax, and an optional colorant; and a surface additive at least partially coating toner particle surfaces. The surface additive includes a mixture of a hexamethyldisilazane (HMDS) surface treated silica, a sol-gel silica that is not surface treated, and a polydimethylsiloxane (PDMS) surface treated silica.Type: GrantFiled: April 3, 2012Date of Patent: April 15, 2014Assignee: Xerox CorporationInventors: Grazyna E. Kmiecik-Lawrynowicz, Brian S. Wang, Robert D. Bayley, Maura A. Sweeney, Daniel W. Asarese
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Patent number: 8691483Abstract: 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: GrantFiled: May 25, 2011Date of Patent: April 8, 2014Assignee: Mitsubishi Chemical CorporationInventor: Shiro Yasutomi
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Patent number: 8679715Abstract: An electrostatic image developing toner includes a toner mother particle that contains a binder resin and a releasing agent; and an external additive that contains a zinc compound particle and a silica particle, wherein the zinc compound particle has a number average particle diameter of from about 2.0 ?m to about 10.0 ?m, the silica particle has a number average particle diameter of from about 60 nm to about 250 nm, the number of free zinc compound particles in all toner particles is from about 0.2% by number to about 1.0% by number, and the free zinc compound particle has an average circularity of about 0.6 or less.Type: GrantFiled: August 28, 2009Date of Patent: March 25, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Masahiro Okita, Rieko Kataoka
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Patent number: 8663885Abstract: In a positively chargeable toner, calcium carbonate fine particles having a certain average primary particle diameter are attached to the surface of toner base particles. The toner base particles contain at least a binder resin and a colorant. The calcium carbonate fine particles are ones which had been subjected to a surface treatment with a positively chargeable surface treating agent and a silicone oil. A mass ratio of the positively chargeable surface treating agent to the silicone oil attached to the surface of the calcium carbonate fine particles is set to be 7:3 to 3:7 in terms of the positively chargeable surface treating agent:the silicone oil.Type: GrantFiled: August 9, 2012Date of Patent: March 4, 2014Assignee: Kyocera Document Solutions Inc.Inventor: Toru Takatsuna
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Publication number: 20140051020Abstract: The present invention provides magnetic iron oxide particles having a high bonding property to a resin as well as a magnetic carrier for electrophotographic developers which is improved in durability by enhancing adhesion between a magnetic carrier core material and a coating resin. The magnetic iron oxide particles of the present invention are magnetic iron oxide particles having an average particle diameter of 0.5 to 30 ?m onto which a plurality of granules are bonded, and the magnetic carrier for electrophotographic developers according to the present invention is a magnetic carrier for electrophotographic developers which comprises spherical magnetic composite particles produced by dispersing magnetic iron oxide particles in a binder resin in which the magnetic iron oxide particles comprise at least the above magnetic iron oxide particles having an average particle diameter of 0.5 to 30 ?m onto which the plurality of granules are bonded.Type: ApplicationFiled: March 29, 2012Publication date: February 20, 2014Applicant: TODA KOGYO CORPORATIONInventors: Shigenori Harada, Shinji Uemoto, Hiromitsu Misawa, Eiichi Kurita, Koso Aoki
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Patent number: 8652732Abstract: The present disclosure provides toners having a tunable gloss level, electrophotographic apparatus for suing such toners as well as processes for making such toners.Type: GrantFiled: March 4, 2013Date of Patent: February 18, 2014Assignee: Xerox CorporationInventors: Edward G. Zwartz, T. Brian McAneney, Valerie M. Farrugia, Jordan H. Wosnick, Richard P N Veregin, Eric Rotberg
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Patent number: 8652737Abstract: A toner which has i) toner base particles containing at least a binder resin and a colorant and ii) a fatty acid metal salt composition as an external additive. The fatty acid metal salt composition contains a nonionic surface-active agent and a fatty acid metal salt. This toner and an image forming process making use of the toner can keep the toner from adhering to a toner carrying member throughout running, promise a stable chargeability of the toner and can keep any deterioration of halftone image quality from being caused by excess charging of the toner and any image fog from being caused by insufficient charging of the toner.Type: GrantFiled: November 6, 2008Date of Patent: February 18, 2014Assignee: Canon Kabushiki KaishaInventors: Satoshi Handa, Naoya Isono, Katsuyuki Nonaka, Koji Abe, Yasuhiro Hashimoto, Akira Sugiyama, Yuhei Terui
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Patent number: 8632933Abstract: A developer for electrostatic latent image development including a positively chargeable toner and a fatty acid metal salt is used, in which the fatty acid metal salt is a metal salt selected from the group consisting of zinc, calcium, and magnesium salts of fatty acids of 12 to 20 carbon atoms and has a certain volume average particle diameter and particle size distribution.Type: GrantFiled: July 20, 2012Date of Patent: January 21, 2014Assignee: Kyocera Document Solutions Inc.Inventors: Masami Tujihiro, Yukinori Nakayama