Polyester Backbone Binder (e.g., Condensation Reaction Product, Etc.) Patents (Class 430/109.4)
-
Publication number: 20150037729Abstract: The toner includes a resin component containing a crystalline polyester resin and a polyester-type resin that has a long-chain monomer bonded by condensation at a terminal, the toner having, in a total heat flow measured by a temperature-modulated differential scanning calorimeter, an endothermic peak resulting from the crystalline polyester resin in a specific temperature range, and the percentage of the endothermic quantity of the endothermic peak in a reversing heat flow with respect to the endothermic quantity of the endothermic peak in the total heat flow being at least 20.0%.Type: ApplicationFiled: July 29, 2014Publication date: February 5, 2015Inventors: Daisuke Yoshiba, Katsuhisa Yamazaki, Koji Nishikawa, Shotaro Nomura, Hiroki Akiyama, Masami Fujimoto
-
Publication number: 20150037718Abstract: A toner, including: a crystalline resin; a non-crystalline resin; and a colorant, wherein the toner has a sea-island structure which includes a sea containing the crystalline resin and an island containing the non-crystalline resin and the colorant, wherein the island is 1.0 ?m or less in domain diameter, and wherein the toner is 1.7×104 Pa or less in storage elastic modulus at 160° C.Type: ApplicationFiled: March 7, 2013Publication date: February 5, 2015Inventors: Tatsuya Morita, Kazumi Suzuki, Shingo Sakashita, Masana Shiba, Taichi Nemoto, Yoshitaka Yamauchi, Azumi Miyaake, Rintaro Takahashi
-
Patent number: 8940468Abstract: Disclosed is a process for production of a decolorable toner, including: aggregating dispersed fine particles of a color material comprising at least a color-forming compound, a color-developing agent and a decoloring agent with dispersed fine particles comprising at least a binder resin comprising a polyester resin to form aggregates in an aqueous medium, adding a reactive polymer having an oxazoline group in to the aqueous medium, and fusing the aggregates in the aqueous medium. As a result, it becomes possible to produce a decolorable toner which suppresses the generation of fine powder due to the release of fine particles of an erasable color material from the toner.Type: GrantFiled: June 29, 2012Date of Patent: January 27, 2015Assignee: Toshiba Tec Kabushiki KaishaInventors: Takayasu Aoki, Takafumi Hara, Tsuyoshi Itou, Masahiro Ikuta, Motonari Udo, Koji Shimokusa, Hiroshi Mizuhata
-
Publication number: 20150024322Abstract: There is provided a toner binder containing a polyester resin (P) composed of two or more polyester resins that are each obtained by polycondensation of a carboxylic acid component (x) and an alcohol component (y). The alcohol component (y) of at least one polyester resin (P1) constituting the polyester resin (P) comprises 30 to 100 molar % of an adduct (y1) of bisphenol A with 2 to 4 ethylene oxide molecules. The alcohol component (y) of at least one other polyester resin (P2) constituting the polyester resin (P) comprises 50 to 95 molar % of an aliphatic diol (y2) having 2 to 4 carbon atoms. The (P2) is other than the (P1), and the polyester resin (P) satisfies relationships as follows. 11.5?SP value [(cal/cm3)1/2] of (P)?13.0; and 5.2?HLB value (according to the Oda method) of (P)?7.1.Type: ApplicationFiled: February 25, 2013Publication date: January 22, 2015Applicant: SANYO CHEMICAL INDUSTRIES, LTD.Inventors: Yuko Sugimoto, Keisuke Miyamoto, Masaru Honda
-
Publication number: 20150024312Abstract: A toner, including: a binder resin; and a colorant, wherein the toner has a storage modulus of 1.0×107 Pa or more at 50° C., a loss modulus of 8.0×104 Pa to 2.0×105 Pa at 80° C., and a loss modulus of 2.0×102 Pa to 1.0×103 Pa at 160° C.Type: ApplicationFiled: February 28, 2013Publication date: January 22, 2015Inventors: Masana Shiba, Hiroshi Yamashita, Tsuyoshi Sugimoto, Daisuke Asahina, Yukari Fukuda, Rintaro Takahashi, Satoyuki Sekiguchi
-
Patent number: 8936895Abstract: To provide a toner, which contains: base particles each having a core-shell structure, where a core of the base particle contains crystalline polyester, non-crystalline polyester, a colorant, and a releasing agent, and a shell of the base particle contain a resin, wherein the toner has thermal hardness of 0.5 to 1.8, wherein the toner has a softening index of 80° C. to 95° C., and wherein the toner has thermal retentiveness of 30° C. to 50° C.Type: GrantFiled: October 7, 2011Date of Patent: January 20, 2015Assignee: Ricoh Company, Ltd.Inventor: Hideki Sugiura
-
Patent number: 8936897Abstract: A composite color toner image can be enhanced by applying a separate fluorescing toner image over it to provide an enhanced color toner image having a “pinkish” fluorescing effect. This separate fluorescing toner image is obtained using visible fluorescing dry magenta toner particles. Each of these toner particles consists essentially of a polymeric binder phase and a visible fluorescing colorant that emits at one or more peak wavelengths of at least 510 nm and up to and including 590 nm and that is dispersed within the polymeric binder phase.Type: GrantFiled: May 2, 2012Date of Patent: January 20, 2015Assignee: Eastman Kodak CompanyInventors: Dinesh Tyagi, Louise Granica, Chung-Hui Kuo
-
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
-
Patent number: 8932789Abstract: To provide a toner, which contains: a non-crystalline polyester resin A obtained through a reaction between a non-linear chain reactive precursor and a curing agent, and having a glass transition temperature of ?60° C. to 0° C.; a non-crystalline polyester resin B having a glass transition temperature of 40° C. to 70° C.; and a crystalline polyester resin C, wherein the toner has a glass transition temperature Tg1st of 20° C. to 40° C. as measured with first heating in differential scanning calorimetry (DSC).Type: GrantFiled: August 24, 2012Date of Patent: January 13, 2015Assignee: Ricoh Company, Ltd.Inventors: Tsuyoshi Sugimoto, Hiroshi Yamashita, Daisuke Asahina, Satoyuki Sekiguchi, Rintaro Takahashi, Masana Shiba, Yukari Fukuda, Saki Konno
-
Patent number: 8932790Abstract: The toner includes a pigment; and a block copolymer having a polyester block A including a residual group of a hydroxycarboxylic acid, and a polyester block B including an anionic group. When cross-section of the block copolymer is observed by a tapping mode atomic force microscope to obtain a phase image of the cross-section, the polyester block B, which has relatively large phase delay, is dispersed as domains having an average size of from 20 nm to 100 nm in a domain of the polyester block A, which has relatively small phase delay. The block copolymer has a first glass transition temperature of from ?20° C. to 20° C., and a second glass transition temperature of from 35° C. to 65° C. when the first and second glass transition temperatures are determined from a thermogram obtained by subjecting the block copolymer to differential scanning calorimetry (DSC) at a temperature rising speed of 5° C./min.Type: GrantFiled: December 17, 2012Date of Patent: January 13, 2015Assignee: Ricoh Company, Ltd.Inventors: Yoshitaka Yamauchi, Masahide Yamada, Yoshihiro Moriya, Taichi Nemoto, Yukiko Nakajima, Keiji Makabe, Daiki Yamashita, Suzuka Amemori, Akiyoshi Sabu
-
Publication number: 20150010862Abstract: According to one implementation, a two-component developer for developing an electrostatic latent image includes a toner particle and a carrier particle. The toner particle includes an external additive on a surface of a toner mother particle including at least a binding resin. The carrier particle includes a resin covering layer on a surface of a carrier core material particle. The resin covering layer includes a covering resin obtained by polymerizing at least an isobutyl methacrylate monomer and includes a nitrogen atom as an atom composing the covering resin.Type: ApplicationFiled: July 3, 2014Publication date: January 8, 2015Inventors: Yoshiyasu MATSUMOTO, Kosuke NAKAMURA, Satoshi UCHINO, Hidehito HARUKI, Hiroyuki KOZURU
-
Publication number: 20150010336Abstract: The present disclosure provides for enzymatic polymerization to produce polyester resins suitable for use in manufacturing toners. In embodiments, crystalline copolymers, which are polyesters, may be synthesized from lactones, cyclic anhydrides, cyclic carbonates, and combinations thereof. These crystalline copolymers, in turn, may be utilized in the synthesis of toner particles.Type: ApplicationFiled: September 20, 2014Publication date: January 8, 2015Inventors: Jordan H Wosnick, Santiago Faucher, Edward G Zwartz, Michael S Hawkins, Karen A Moffat
-
Publication number: 20150004541Abstract: A toner comprising a binder resin and a wax, wherein the binder resin contains a binder resin A and a binder resin B, the binder resin A has a softening point of at least 120° C. and not more than 150° C., has a polyester unit, and has a terminal of which a first aliphatic compound having a melting point of 60° C. or more and not more than 85° C. has been condensed, and the binder resin B has a softening point of at least 80° C. and not more than 115° C., has a polyester unit, and has a terminal of which a second aliphatic compound having a melting point of 90° C. or more and not more than 120° C. has been condensed.Type: ApplicationFiled: June 19, 2014Publication date: January 1, 2015Inventors: Toru Takahashi, Yoshihiro Ogawa, Daisuke Tsujimoto, Naohiko Tsuchida, Wakashi Iida
-
Publication number: 20150004540Abstract: An electrostatic latent image developing toner contains toner particles each including a toner core containing a binder resin, and a shell layer coating the surface of the tore core. The shell layer contains a unit derived from a monomer of a thermosetting resin, and a unit derived from a thermoplastic resin. The resin contained in the shell layer has a unit derived from one or more monomers of thermosetting resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin.Type: ApplicationFiled: June 26, 2014Publication date: January 1, 2015Applicant: KYOCERA DOCUMENT SOLUTIONS INC.Inventors: Yoshio OZAWA, Naruo YABE, Masami TSUJIHIRO, Ryotaro KOMADA
-
Patent number: 8921021Abstract: A polyester resin for a toner obtained by polycondensing a carboxylic acid component and an alcohol component, wherein the polyester resin for a toner is obtained using, as the carboxylic acid component and/or the alcohol component, a specified aromatic compound; a polyester resin for a toner obtained by polycondensing a reaction product obtained by treating a specified aromatic compound with a carboxylic acid having an unsaturated reactive group, a carboxylic acid component, and an alcohol component; a resin binder for a toner, containing the polyester resin for a toner; and a toner for electrophotography, containing the resin binder. The polyester resin for a toner of the present invention is suitably used for a resin binder of a toner used in developing and the like of latent images formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.Type: GrantFiled: October 1, 2010Date of Patent: December 30, 2014Assignee: Kao CorporationInventors: Norihiro Fukuri, Takashi Kubo, Yasunori Inagaki, Katsutoshi Aoki
-
Patent number: 8921022Abstract: A toner for electrostatic image development containing a resin binder and a releasing agent, wherein the resin binder contains a polyester A having a furan ring, and wherein the releasing agent contains an ester wax, and a method for producing the toner. The toner for electrostatic image development 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: March 11, 2013Date of Patent: December 30, 2014Assignee: Kao CorporationInventors: Takeshi Ashizawa, Shogo Watanabe, Takashi Kubo, Norihiro Hirai
-
Publication number: 20140377700Abstract: Provided is a toner for electrostatic image development, having both sufficient low-temperature fixability and good post-fixing separability simultaneously. The toner for electrostatic image development includes: a second amorphous polyester resin including a structural unit represented by any of the following general formulas (1) to (3); and a first amorphous polyester resin including no structural units represented by the general formulas (1) to (3).Type: ApplicationFiled: June 16, 2014Publication date: December 25, 2014Inventors: Tomoko MINE, Anju Hori, Ken Ohmura, Mikio Kouyama
-
Patent number: 8916320Abstract: A process for making a latex emulsion including contacting at least one amorphous polyester resin with at least two organic solvents to form a resin mixture, adding a neutralizing agent, and deionized water to the resin mixture, removing the solvent from the formed latex, and separating the solvent from water. Further, the process is carried out above the resin Tg for making the latex, which drives the latex particle size under 100 nm, where toners made from the latex show improved charging performance.Type: GrantFiled: January 15, 2013Date of Patent: December 23, 2014Assignee: Xerox CorporationInventors: Shigang Qiu, Richard P N Veregin, Kimberly D Nosella, Santiago Faucher, Cuong Vong, Enno E Agur
-
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
-
Publication number: 20140370435Abstract: The instant disclosure describes methacrylate coated carrier resins with aromatic substituent groups with optionally carbon atoms replaced by heteroatoms such as S, N, and O 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
-
Publication number: 20140370434Abstract: A method for reclaiming an out-of-spec emulsion material includes recovering the out-of-spec emulsion material from a scrap manufacturing batch; distilling the out-of-spec emulsion material to raise a solids content of the out-of-spec emulsion material to about 45 wt % or more based on a total weight of the emulsion material; dissolving the distilled emulsion material in a solvent to form a first mixture; adding a base to the first mixture to neutralize acid groups present in the distilled emulsion material, forming a second mixture; emulsifying the second mixture by adding water to the second mixture; and forming particles having an average particle diameter (D50v) within a target range, wherein the out-of-spec emulsion material has an average particle diameter falling outside of the target range.Type: ApplicationFiled: June 13, 2013Publication date: December 18, 2014Inventors: Shigang Steven QIU, Amy GRILLO, Chieh-Min CHENG, Tie Hwee NG
-
Patent number: 8911924Abstract: A toner including base particles each containing a crystalline polyester and a non-crystalline polyester, wherein the toner has a glass transition temperature of 45° C. or higher where the glass transition temperature is determined from a DSC curve of the toner obtained in the first elevation of temperature thereof, and wherein the toner has a temperature width of 8° C. or lower where the temperature width is a temperature width at ? the height of an endothermic peak attributed to the crystalline polyester in the DSC curve.Type: GrantFiled: October 13, 2011Date of Patent: December 16, 2014Assignee: Ricoh Company, Ltd.Inventors: Tomoyuki Sato, Naohiro Watanabe, Tsuyoshi Sugimoto, Shinya Hanatani, Mamoru Hozumi
-
Publication number: 20140363209Abstract: A toner for developing an electrostatic image, which contains: resin particles (C), wherein the resin particles (C) each contain a resin particle (B) and resin particles (A) or a coating film (P) deposited on a surface of the resin particle (B), where the resin particle (B) contains a second resin (b) and a filler (f), wherein the resin particles (A) or the coating film (P) contains a first resin (a), wherein the second resin (b) contains a crystalline resin, and wherein the resin particle (B) contains the filler (f) in an amount of 15% by mass or greater.Type: ApplicationFiled: February 7, 2013Publication date: December 11, 2014Inventors: Ryota Inoue, Yoshitaka Sekiguchi, Hiroaki Katoh, Shun Saito
-
Patent number: 8906588Abstract: An electrostatic charge image developing toner is provided which includes a core particle that contains an amorphous polyester resin and a colorant; and a shell layer that covers the core particle and contains a polystyrene resin, wherein a softening temperature Ma of the shell layer and a softening temperature Mb of the core particle satisfy a relationship of 10° C.?Ma-Mb?45° C.Type: GrantFiled: June 6, 2013Date of Patent: December 9, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Tomohiro Shinya, Shinpei Takagi, Soichiro Kitagawa, Shinya Sakamoto
-
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
-
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
-
Publication number: 20140349231Abstract: Disclosed is a toner for electrostatic image development that has excellent low-temperature fixability and also has sufficient heat-resistant storage stability. The toner for electrostatic image development includes toner particles containing an amorphous resin including amorphous resins A and B and a crystalline polyester resin. The toner particles have a domain-matrix structure in which a domain phase including fine core particles of the crystalline polyester resin is dispersed in a matrix phase formed of the amorphous resin A composed of a vinyl-based polymer. The surface of the fine core particles of the crystalline polyester resin is coated with the amorphous resin B composed of a vinyl-based polymer.Type: ApplicationFiled: May 21, 2014Publication date: November 27, 2014Applicant: Konica Minolta, Inc.Inventors: Aya SHIRAI, Hiroshi Nagasawa, Kaori Matsushima, Masahiro Matsuoka, Takaki Kawamura, Taiki Amemiya
-
Patent number: 8895220Abstract: An emulsion aggregation toner formulation for electrophotography and a method for preparation thereof. The emulsion aggregation toner formulation includes a polyester resin emulsion formed using an extruded polyester binder resin having a broad molecular weight distribution. The extruded polyester binder resin is formed using a plurality of polyester binder resins. Further, the emulsion aggregation toner formulation comprises at least one colorant dispersion and a wax dispersion.Type: GrantFiled: August 29, 2013Date of Patent: November 25, 2014Assignee: Lexmark International, Inc.Inventors: Michael James Bensing, Craig Michael Bartelsen, John Joseph Kraseski, Bryan Patrick Livengood, Jing X. Sun, Vincent Wen-Hwa Ting
-
Patent number: 8895217Abstract: An electrostatic image forming toner including: toner base particles each containing at least a colorant, a binder resin, and a releasing agent, wherein the binder resin contains a non-crystalline polyester resin A and a crystalline polyester resin B, wherein a ratio of B/(A+B)×100 is 10 or more but less than 50 where (A+B) is a total mass of the non-crystalline polyester resin A and the crystalline polyester resin B and “B” is a mass of the crystalline polyester resin B, and wherein the toner base particles have a TMA compression deformation amount (TMA %) of 10% or less which is measured at 50° C. and a relative humidity of 90%.Type: GrantFiled: January 28, 2013Date of Patent: November 25, 2014Assignee: Ricoh Company, Ltd.Inventors: Daisuke Asahina, Tsuyoshi Sugimoto, Rintaro Takahashi, Hiroshi Yamashita, Taichi Nemoto, Shingo Sakashita, Yoshitaka Yamauchi, Satoyuki Sekiguchi
-
Publication number: 20140342284Abstract: An electrophotographic toner including: a binder resin, wherein the binder resin has one glass transition temperature Tg and the glass transition temperature Tg of the binder resin is within 25° C. to 65° C. as measured in second heating with a differential scanning calorimeter at a heating rate of 5° C./min, and wherein a phase image of the binder resin obtained with an atomic force microscope (AFM) of tapping mode contains first phase difference regions and a second phase difference region such that the first phase difference regions are dispersed in the second phase difference region, where the first phase difference regions correspond to greater phase difference regions and the second phase difference region corresponds to a smaller phase difference region when an intermediate value between a maximum value and a minimum value of the phase differences is used as a threshold.Type: ApplicationFiled: September 12, 2012Publication date: November 20, 2014Inventors: Yoshihiro Moriya, Masahide Yamada, Taichi Nemoto, Yukiko Nakajima, Yoshitaka Yamauchi, Keiji Makabe, Daiki Yamashita, Suzuka Amemori, Akiyoshi Sabu
-
Publication number: 20140342283Abstract: To provide a toner for developing an electrostatic image, the toner including toner particles, wherein the toner particles contain: a non-crystalline resin A; and a crystalline resin, wherein the crystalline resin contains a crystalline resin C containing a urethane bond, or a urea bond, or both thereof, and wherein the toner particles each have a sea-island structure, where the resin C is dispersed in the non-crystalline resin on a cross-section of the toner particle.Type: ApplicationFiled: May 12, 2014Publication date: November 20, 2014Inventors: Atsushi Yamamoto, Hiroshi Yamada, Takamasa Hase, Kohsuke Nagata
-
Patent number: 8889327Abstract: A toner for developing electrostatic images contains a binder resin, a colorant, a release agent, and a charge control agent. The release agent contains a wax having a polar group. The toner for developing electrostatic images has tan ? of 1 to 2 at a temperature of 80° C. to 145° C. as measured with a viscoelasticity measuring apparatus at a frequency of 10 Hz and a shear stress of 500 Pa, and has a breaking point of 180° C. or less in a temperature-tan ? curve.Type: GrantFiled: October 15, 2012Date of Patent: November 18, 2014Assignee: Kyocera Document Solutions Inc.Inventor: Toshiki Takemori
-
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
-
Patent number: 8889326Abstract: A toner including a colorant, a resin, and a volatile organic compound in an amount from 1 to 200 ?g/g is provided. The toner has a softening index Ct within a range from 70 to 100° C.Type: GrantFiled: February 1, 2013Date of Patent: November 18, 2014Assignee: Ricoh Company, Ltd.Inventor: Hideki Sugiura
-
Patent number: 8883387Abstract: An electrostatic image developing toner of the exemplary embodiment of the invention contains an amorphous first polyester resin of a polycondenzation product of at least a carboxylic acid component and an alcohol component containing rosin, and a second polyester resin having the difference (absolute value) in parameter of solubility relative to the first polyester resin of from about 0.3 (cal/cm3)1/2 to about 3 (cal/cm3)1/2.Type: GrantFiled: September 25, 2012Date of Patent: November 11, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Emi Miyata, Sumiaki Yamasaki, Satoshi Hiraoka, Yuki Sasaki, Susumu Yoshino, Hirotaka Matsuoka
-
Patent number: 8883385Abstract: A toner includes a binder resin, a coloring agent, and a releasing agent containing two or more kinds of alkyl monoester compounds having a different number of carbon atoms in a range of from 30 to 50 carbon atoms. The toner has a crystallinity of 10% or more as measured by x-ray diffraction and/or the binder resin is a crystalline resin in an amount of 50% by weight or more of the binder resin. The two or more kinds of alkyl monoester compounds include a component A accounting for the largest amount ranging from 30% by weight to less than 50% by weight of the releasing agent and a component B accounting for the second largest amount ranging from 10% by weight to less than 50% by weight of the releasing agent.Type: GrantFiled: December 5, 2012Date of Patent: November 11, 2014Assignee: Ricoh Company, Ltd.Inventors: Shingo Sakashita, Hiroshi Yamashita, Masahide Yamada, Shinya Nakayama, Atsushi Yamamoto, Yukiko Nakajima
-
Patent number: 8883386Abstract: Disclosed herein is a toner for use in an electronic photograph-duplicating process or in an electrostatic printing process, and a polyester resin included in the toner as a binder. The polyester resin comprises lactic acids (D or L-lactic acids) or lactides (D or L-lactides) which are derivative compounds thereof, and dianhydrohexitols which are bio-derived sugar derivatives.Type: GrantFiled: January 6, 2011Date of Patent: November 11, 2014Assignee: SK Chemicals Co., Ltd.Inventors: Young Man Yoo, Kye Yune Lee, Tae Woong Lee, Jong Wook Shin
-
Patent number: 8877417Abstract: In a toner formed of toner particles which include a colorant, a wax, and a binder resin containing a crystalline resin (a) primarily composed of a polyester, the crystalline resin has an endothermic peak temperature (Tp) in a range of 50° C. to 80° C., and in a viscoelasticity measurement of the toner, G?(Tp?10) is in a range of 5.0×107 to 5.0×108 Pa, G?(Tp+10) is in a range of 5.0×105 to 5.0×106 Pa, and G?(Tp?20), G?(Tp?10), G?(Tp+10), and G?(Tp+30) satisfy specific relationships.Type: GrantFiled: July 19, 2011Date of Patent: November 4, 2014Assignee: Canon Kabushiki KaishaInventors: Takaaki Kaya, Kenji Aoki, Ayako Okamoto, Atsushi Tani, Takashige Kasuya
-
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
-
Patent number: 8877420Abstract: A method for producing particles, including: bringing a compressive fluid into contact with a pressure plastic material, so as to plasticize the pressure plastic material; applying a shear force to the compressive fluid and the plasticized pressure plastic material, between which an interface exists, in the presence of a surfactant to granulate the pressure plastic material in the compressive fluid, so as to produce particles.Type: GrantFiled: March 9, 2011Date of Patent: November 4, 2014Assignee: Ricoh Company, Ltd.Inventors: Chiaki Tanaka, Ryota Inoue, Taichi Nemoto, Yoshitaka Yamauchi
-
Patent number: 8877414Abstract: An electrostatic image developing toner including: a toner matrix particle having an adhering particle adhered onto the surface of a central particle, wherein a volume average value of a ratio X of a peripheral length PM to a circle-corresponding diameter D is from 3.6 to 5.0.Type: GrantFiled: February 22, 2011Date of Patent: November 4, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Atsushi Sugawara, Shinpei Takagi, Atsushi Sugitate, Daisuke Noguchi
-
Publication number: 20140322643Abstract: A toner including a non-crystalline polyester resin and a crystalline polyester resin, wherein a tetrahydrofuran soluble component of the non-crystalline polyester resin has a weight-average molecular weight of 3,000 to 8,000 measured by gel permeation chromatography, and wherein the toner has a glass transition temperature A before an extraction process of the toner with methanol and a glass transition temperature B after the extraction process of the toner with methanol, and a difference between A and B (B?A) is 2.0° C. or less.Type: ApplicationFiled: October 17, 2012Publication date: October 30, 2014Inventors: Masaki Watanabe, Satoshi Ogawa, Teruki Kusahara, Ryuta Yoshida
-
Publication number: 20140322641Abstract: The present disclosure provides a polyester toner resin comprising gallic acid for use in manufacturing an emulsion aggregation (EA) toner for imaging devices.Type: ApplicationFiled: April 30, 2013Publication date: October 30, 2014Applicant: Xerox CorporationInventors: Ke Zhou, Guerino G. Sacripante, Marko Saban
-
Publication number: 20140322642Abstract: The present disclosure provides a polyester toner resin comprising a natural phenol used in manufacturing a toner for imaging devices.Type: ApplicationFiled: April 30, 2013Publication date: October 30, 2014Applicant: Xerox CorporationInventors: Guerino G. Sacripante, Ke Zhou, Biritawit Asfaw, Sonja Hadzidedic, Rosa Duque
-
Patent number: 8871415Abstract: There is provided a toner for electrostatic-image development that can obtain heat-resistant storability, fixed image strength and long-term stability of charging while having excellent low-temperature fixing property. The toner is formed, with toner particles containing a binder resin and a crystalline ester compound, and the binder resin contains a styrene-acrylic resin including a structural unit derived from an acrylic ester monomer.Type: GrantFiled: April 17, 2013Date of Patent: October 28, 2014Assignee: Konica Minolta, Inc.Inventors: Hiroshi Nagasawa, Kouji Sugama, Hiroyuki Konno, Takaki Kawamura
-
Patent number: 8865384Abstract: An electrophotographic toner, including: a binder resin; a colorant; and an organically-modified layered inorganic mineral, wherein the binder resin contains 50% by mass or more of a crystalline resin relative to the binder resin, and the crystalline resin contains a resin having a sulfonic acid group, and wherein an amount of the sulfonic acid group is 0.1% by mass to 2.0% by mass relative to the resin having the sulfonic acid group.Type: GrantFiled: March 8, 2013Date of Patent: October 21, 2014Assignee: Ricoh Company, Ltd.Inventors: Masahide Yamada, Shinya Nakayama, Atsushi Yamamoto, Hideyuki Santo, Shingo Sakashita, Yukiko Nakajima, Suzuka Amemori, Akiyoshi Sabu
-
Publication number: 20140308611Abstract: It is an object of the present invention to provide a toner capable of being fixed at low energy and forming an image with high resistance to external forces, such as rubbing and scratching. The object is achieved by a toner including toner particles that contain a binder resin and a colorant, a sea-island structure including a sea portion composed of the crystalline resin C serving as a main component and island portions composed of the amorphous resin A serving as a main component is observed at the observation of a cross section of each of the toner particles.Type: ApplicationFiled: June 27, 2014Publication date: October 16, 2014Inventors: Tsutomu Shimano, Shintaro Noji, Hitoshi Itabashi
-
Patent number: 8859179Abstract: A developer, including a toner including a binder resin comprising a crystalline resin; and a colorant, and a resin carrier comprising a resin; a magnetic particulate material having a magnetic anisotropy, dispersed in the resin, and having a saturated magnetization of from 16 to 30 emu/g, a coercive force of from 15 to 40 kA/m and an average particle diameter not less than 15 ?m and less than 100 ?m.Type: GrantFiled: November 16, 2012Date of Patent: October 14, 2014Assignee: Ricoh Company, Ltd.Inventors: Hideyuki Santo, Masahide Yamada, Kazumi Suzuki, Shinya Nakayama, Atsushi Yamamoto, Tatsuya Morita, Shingo Sakashita, Yukiko Nakajima, Keiji Makabe, Daiki Yamashita
-
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
-
Publication number: 20140301757Abstract: A toner including at least a crystalline resin as a binder resin, wherein a tetrahydrofuran soluble content of the toner includes 5.0% or more as a peak area of a component having a molecular weight of 100,000 or greater in a molecular weight distribution measured by gel permeation chromatography, and the tetrahydrofuran soluble content of the toner has a weight-average molecular weight of 20,000 to 60,000.Type: ApplicationFiled: October 17, 2012Publication date: October 9, 2014Inventors: Shingo Sakashita, Shinya Nakayama, Masahide Yamada, Atsushi Yamamoto, Hideyuki Santo, Yukiko Nakajima, Suzuka Amemori