Organic Sulfur Compound Adjuvant Patents (Class 430/108.5)
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Patent number: 11397386Abstract: A toner comprising a toner particle that includes a binder resin, wherein in dynamic viscoelasticity measurement of the toner, the storage elastic modulus of the toner at 70° C. is from 0.10 MPa to 3.00 MPa, and in nanoindentation measurement of the toner, the surface storage elastic modulus of the toner at 25° C. under 150 ?N of load is from 2.80 GPa to 4.50 GPa.Type: GrantFiled: May 11, 2020Date of Patent: July 26, 2022Assignee: CANON KABUSHIKI KAISHAInventors: Hirofumi Kyuushima, Yoshiaki Shiotari, Shintaro Noji, Mai Kato
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Patent number: 11262667Abstract: A magnetic toner includes toner particles. The toner particles each include a toner mother particle and an external additive attached to a surface of the toner mother particle. The toner mother particles contain a binder resin and a magnetic powder. The external additive includes resin particles as external additive particles. The resin particles have a blocking rate of no greater than 40% by mass. The resin particles have a number average primary particle diameter of at least 40 nm and no greater than 120 nm. A resin constituting the resin particles is a vinyl resin including repeating units represented by general formulas (1) and (2), and a repeating unit derived from a sulfo group-containing vinyl compound. The content of the repeating unit derived from the sulfo group-containing vinyl compound in the vinyl resin is at least 0.1 mol % and no greater than 3.Type: GrantFiled: August 4, 2020Date of Patent: March 1, 2022Assignee: KYOCERA Document Solutions Inc.Inventors: Toru Takatsuna, Sho Sumioka
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Patent number: 10266713Abstract: A particle dispersion liquid includes: an aqueous medium; at least one of a compound represented by Formula (I) and a compound represented by Formula (II), which is dispersed in the aqueous medium; and at least one of: (i) a polymer having alkyl (meth) acrylate as a structural unit, the alkyl (meth) acrylate containing an alicyclic hydrocarbon group having a bridged bond, the polymer having an acid value ranging from 6 mgKOH/g to 100 mgKOH/g, and (ii) a polyester resin containing 20% by mass or more of a unit represented by Formula (F1) in the polyester.Type: GrantFiled: July 7, 2017Date of Patent: April 23, 2019Assignee: FUJI XEROX CO., LTD.Inventors: Suguru Nakaso, Naomi Miyamoto, Takahiro Ishizuka, Soichiro Kitagawa
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Patent number: 9110391Abstract: A toner includes a polymeric resin, optionally a colorant, and a small molecule crystalline diester having an aromatic core and a molecular weight less than 1,000 g/mol. The polymeric resin may be an amorphous resin and a mixture of the amorphous resin and the crystalline aromatic diester may be characterized by a reduction in glass transition temperature from that of the resin and by the lack of a significant solid to liquid phase transition peak for the small molecule compound as determined by differential scanning calorimetry, the enthalpy of fusion for the small molecule compound in the mixture being measured to be less than 10% of the enthalpy of fusion of the compound in pure form. Furthermore, the toner may be configured to have a crease fix minimum fusing temperature (MFT) less than or equal to the crease fix MFT of a benchmark ultra-low-melt emulsion aggregation toner.Type: GrantFiled: November 11, 2013Date of Patent: August 18, 2015Assignee: XEROX CORPORATIONInventors: Ke Zhou, Jordan H. Wosnick, Kentaro Morimitsu, Karen A. Moffat, Biritawit Asfaw, Edward G. Zwartz, Valerie M. Farrugia
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Publication number: 20150093698Abstract: There is provided a resin composition containing an infrared absorber as an inner salt, at least either a carboxylic acid ester or a phosphoric acid ester, and a resin; and an image forming material containing an infrared absorber as an inner salt, at least either a carboxylic acid ester or a phosphoric acid ester, and a thermoplastic resin.Type: ApplicationFiled: September 29, 2014Publication date: April 2, 2015Applicant: FUJI XEROX CO., LTD.Inventors: Minquan TIAN, Takahiro ISHIZUKA, Makoto FURUKI, Shinji HASEGAWA
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Patent number: 8951704Abstract: A toner includes a crystalline polyester resin having an unsaturated double bond, a thiol compound having a bi- or more-functional thiol group, and a photopolymerization initiator.Type: GrantFiled: August 8, 2013Date of Patent: February 10, 2015Assignee: Fuji Xerox Co., Ltd.Inventors: Koji Horiba, Yoshihiro Inaba, Daisuke Yoshino, Takako Kobayashi, Akira Imai, Masahiro Oki, Hiroyuki Moriya
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Publication number: 20140363762Abstract: A two-component developing agent for developing an electrostatic latent image includes toner particles composed of toner base particles and an exterior additive attached on the toner base particles, and carrier particles composed of carrier core particles and a coating resin provided on the carrier core particles. The coating resin includes a sulfur atom and a resin obtained by polymerizing an isobutyl methacrylate monomer, and the toner base particles include a sulfur atom.Type: ApplicationFiled: May 28, 2014Publication date: December 11, 2014Applicant: Konica Minolta, Inc.Inventors: Kosuke NAKAMURA, Yoshiyasu MATSUMOTO, Satoshi UCHINO, Hidehito HARUKI, Hiroyuki KOZURU
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Patent number: 8841056Abstract: A toner is provided which has toner particles and an inorganic fine powder; the toner particles being obtained by suspension polymerization using a specific polar resin. The toner is a toner in which; where, in displacement levels found in a micro-compression test in which a force is applied to a toner single particle at a loading rate of 9.8×10?6 N/sec to measure a displacement level (?m) at a point of time where the force has reached a maximum force of 4.90×10?4 N, the displacement level of the toner at a measurement temperature of 25° C. is represented by X(25) and the displacement level of the toner at a measurement temperature of 50° C. by X(50), and the number average particle diameter of the toner is represented by D (?m), the X(25), X(50) and D satisfies the relations: 0.10?X(25)/D?0.35??(1) 30?[X(50)?X(25)]/X(25)×100?150??(2).Type: GrantFiled: March 28, 2011Date of Patent: September 23, 2014Assignee: Canon Kabushiki KaishaInventors: Kazumi Yoshizaki, Shinya Yachi, Yasushi Katsuta, Kenichi Nakayama, Takeshi Kaburagi
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Publication number: 20140205945Abstract: To provide a charge controlling agent for electrophotography, which presents sufficient triboelectric chargeability to a toner, is useful particularly for a color toner and further for a polymerized toner, increases a charge rising rate, has a high electric charge amount, is excellent in charging characteristics, stability over time and environmental stability and yet is safe without posing any problem regarding waste regulations, and a negatively chargeable toner for developing an electrostatic image, which uses such a charge controlling agent and which has a high charging performance.Type: ApplicationFiled: January 24, 2014Publication date: July 24, 2014Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Ikuo KIMURA, Masami ITO, Masaya TOJO, Masafumi ASAKAI
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Patent number: 8765344Abstract: An electrophotographic toner and a method of preparing the same, the electrophotographic toner including a binder that includes two kinds of resin having different weight average molecular weights, a colorant, and a releasing agent.Type: GrantFiled: February 7, 2012Date of Patent: July 1, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Jun-young Lee, Kyeong Pang, Tae-hoe Koo, Su-bum Park, Ju-yeon Lee
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Publication number: 20140127620Abstract: A toner particle has a core and a shell surrounding the core, wherein the shell contains a polymerized charge enhanced spacer particle, which is a copolymer of a charge control agent and a monomer. A method of making toner particles includes forming a slurry by mixing together a first emulsion containing a resin, optionally a wax, optionally a colorant, optionally a surfactant, optionally a coagulant, and one or more additional optional additive, heating the slurry to form aggregated particles in the slurry, forming a second emulsion containing a monomer and a charge control agent, polymerizing the second emulsion to form a copolymer of the monomer and the charge control agent, and incorporating the copolymer into the toner particles, wherein the aggregated particles form a core of the toner particles.Type: ApplicationFiled: November 2, 2012Publication date: May 8, 2014Applicant: XEROX CORPORATIONInventors: Robert D. BAYLEY, Maura A. SWEENEY, Grazyna E. KMIECIK-LAWRYNOWICZ
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Publication number: 20140120467Abstract: A toner having charge control agents which impart excellent triboelectric charging characteristics.Type: ApplicationFiled: November 1, 2012Publication date: May 1, 2014Applicant: Xerox CorporationInventors: Maura A. Sweeney, Robert D. Bayley, Grazyna E. Kmiecik-Lawrynowicz, Brian S. Wang
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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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Patent number: 8691482Abstract: The instant disclosure describes methods for preparing latex resins for coated carriers using surfactant partitioning, which resins exhibit both lower ? potential and greater latex stability, while not adversely affecting particle size, toner charge or other metrics.Type: GrantFiled: June 1, 2013Date of Patent: April 8, 2014Assignee: Xerox CorporationInventors: Daryl W Vanbesien, Michael Steven Hawkins, Corey Tracy, Richard P N Veregin, Karen A Moffat, Paul Joseph Gerroir, Thomas E Enright, Valerie Farrugia
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Publication number: 20140004459Abstract: The present invention is a toner for developing electrostatic charge image containing a wax derived from a plant cholesterol, an electric charge-controlling agent, a coloring agent and a binding resin. The toner is suited for use in the electromagnetic induction-heated fixing system which is capable of heating the heating member up to a predetermined fixing temperature in a short period of time, makes it possible to maintain images free of irregular luster or fouling for extended periods of time and is, further, suited for being fixed at a low temperature.Type: ApplicationFiled: March 27, 2012Publication date: January 2, 2014Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Masaki Okubo, Tasuji Orita, Hideyuki Otsuka, Kenichi Sato, Kanae Hiraishi
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Publication number: 20130260305Abstract: The instant disclosure describes methods for preparing latex resins for coated carriers using surfactant partitioning, which resins exhibit both lower ? potential and greater latex stability, while not adversely affecting particle size, toner charge or other metrics.Type: ApplicationFiled: June 1, 2013Publication date: October 3, 2013Inventors: Daryl W Vanbesien, Michael Steven Hawkins, Corey Tracy, Richard PN Veregin, Karen A Moffat, Paul Joseph Gerroir, Thomas E Enright, Valerie Farrugia
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Patent number: 8541154Abstract: A method for making toners to include at least one nanoscale fluorescent pigment particle composition and/or a fluorescent organic nanoparticle composition. The particles are incorporated into emulsion of toner and used in making toner via emulsion aggregation. Such toners may have a core and/or a shell and the clay composites may be included within the core, the shell or both. The fluorescent organic nanoparticle composition includes a polymeric matrix obtained by modified EA latex process and/or emulsion polymerization and one or more fluorescent dyes and the nanoscale fluorescent pigment particle composition includes pigment molecules with at least one functional moiety, and a sterically bulky stabilizer compound including at least one functional group, the functional moiety of the pigment associates non-covalently with the functional group of the stabilizer, and the presence of the associated stabilizer limits the extent of particle growth and aggregation, to afford nanoscale-sized pigment particles.Type: GrantFiled: October 6, 2008Date of Patent: September 24, 2013Assignee: Xerox CorporationInventors: Gabriel Iftime, Daryl W. Vanbesien, Maria M. Birau, Jordan H. Wosnick, Peter M. Kazmaier
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Patent number: 8530127Abstract: A process for preparing toner and a polymerized toner prepared thereby are provided. The process for preparing toner comprises: forming an aqueous dispersion medium comprising calcium phosphate; forming a monomer mixture of a polymer charge control agent having weight average molecular weight of about 10,000 to 20,000, pigment, and a monomer for a binder resin; dispersing the monomer mixture in the aqueous dispersion in the form of droplets; and suspension-polymerizing the monomer mixture dispersed in the form of droplets, wherein about 2 to 6 parts by weight of the calcium phosphate and about 0.6 to 10 parts by weight of the charge control agent are used, on the basis of 100 parts by weight of the monomer mixture.Type: GrantFiled: July 23, 2010Date of Patent: September 10, 2013Assignee: LG Chem, Ltd.Inventors: Wook Jang, Chang-Soon Lee
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Patent number: 8518623Abstract: A toner includes a toner particle, which contains at least a binding resin, a colorant, and two types of polar resins, i.e., a polar resin H and a polar resin L, and which is obtained with granulation in a water-based medium, wherein solubility parameters, glass transition points, and weight-average molecular weights of the binding resin, the polar resin H, and the polar resin L, as well as amounts of the added resins satisfy respective specific relationships.Type: GrantFiled: March 30, 2011Date of Patent: August 27, 2013Assignee: Canon Kabushiki KasihaInventors: Kenta Kamikura, Shinya Yachi, Kazumi Yoshizaki, Yasushi Katsuta, Takeshi Kaburagi
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Patent number: 8501378Abstract: An electrophotographic toner includes a latex, a colorant, and a release agent, wherein G?(80) is in a range of about 2.0×105 Pa to about 3.0×106 Pa and G?(80)/G?(140) is in a range of about 2.0×102 to about 3.0×103, wherein in regard to a molecular weight distribution on a gel permeation chromatography (GPC) chromatogram, the molecular weight region of 1.0×104 g/mol or less of a tetrahydrofuran (THF)-soluble component of the electrophotographic toner is about 5% or less, and the molecular weight region of 1.0×105 g/mol or more of the THF-soluble component of the electrophotographic toner is in a range of about 5% to about 20%, where G?(80) and G?(140) respectively denote storage moduli of the electrophotographic toner at temperatures of 80° C. and 140° C. when a dynamic viscoelasticity according to a sine-wave vibration is measured at an angular velocity of 6.28 rad/sec and at a temperature increase rate of 2.0° C./min.Type: GrantFiled: November 25, 2009Date of Patent: August 6, 2013Assignee: Samsung Electronics Co., LtdInventors: Jeong-hyun Lee, Yong-kyun Jung, Kyeong Pang
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Patent number: 8497054Abstract: Provided is a toner in which faulty transfer under an extremely-low-temperature, low-humidity environment hardly occurs, including toner particles and a zeolite as an external additive, in which a ratio of the alminium atoms to a total of the silicon atoms and the aluminium atoms contained in the zeolite is 0.2 to 24.0%.Type: GrantFiled: October 20, 2010Date of Patent: July 30, 2013Assignee: Canon Kabushiki KaishaInventors: Akira Sugiyama, Katsuyuki Nonaka, Koji Abe, Yasuhiro Hashimoto, Naoya Isono, Yuhei Terui
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Publication number: 20130149641Abstract: To provide a charge controlling agent for electrophotography, which presents sufficient triboelectric chargeability to a toner, is useful particularly for a color toner and further for a polymerized toner, increases a charge rising rate, has a high electric charge amount, is excellent in charging characteristics, stability over time and environmental stability and yet is safe without posing any problem regarding waste regulations, and a negatively chargeable toner for developing an electrostatic image, which uses such a charge controlling agent and which has a high charging performance.Type: ApplicationFiled: September 13, 2011Publication date: June 13, 2013Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Ikuo Kimura, Masami Ito, Masaya Tojo, Masafumi Asakai
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Patent number: 8431298Abstract: Provided are a toner and a toner manufacturing method with which high image density and a broad range of color reproduction are obtained, and with which high-quality images are also obtained. The toner is composed of toner particles that comprise a binding resin containing a polyester resin and a colorant, and contains 10-1,500 ppm of a metal element selected from titanium, germanium, and aluminum, and a cyclic phenol sulfide represented by general formula (1) selected from thiacalixarene, sulfinyl thiacalixarene and sulfonyl thiacalixarene.Type: GrantFiled: June 26, 2009Date of Patent: April 30, 2013Assignee: Konica Minolta Business Technologies, Inc.Inventors: Masahiro Anno, Masahiko Nakamura, Tsuyoshi Uchida, Kouichi Sugama, Kenichi Onaka, Junya Onishi
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Patent number: 8426097Abstract: An electrophotographic toner including a latex, a coloring agent, and a release agent, wherein a difference between an average circularity of toner having a particle size of D16p or less (S16) and an average circularity of toner having a particle size of D50p or less (S50) is about 0.01 or less, wherein the circularity is measured using a flow particle image analyzer (FPIA), and the ratio of an area of wax to a total cross-sectional area of the toner having a particle size of D16p or less is about 8/100 or greater, and wherein the area is measured using a transmission electron microscope (TEM).Type: GrantFiled: December 3, 2009Date of Patent: April 23, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Yo-da Shin, Jun-young Lee, Jae-hwan Kim, Tae-hoe Koo
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Publication number: 20130059245Abstract: The present invention relates to a polymerized toner and a method for preparing the same, wherein the toner can realize an excellent offset feature, high transfer efficiency, and a uniform image and thus can exhibit excellent performances in the applications of high speed copying, development of transferred photos, etc.Type: ApplicationFiled: February 22, 2011Publication date: March 7, 2013Applicant: LG CHEM, LTD.Inventors: Wook Jang, Hak-Soo Kim, Chang-Soon Lee
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Patent number: 8298736Abstract: Provided is a toner comprising toner particles containing a binder resin and coloring matters, wherein the coloring matters comprise a dye represented by Formula (X-1), a metal compound represented by Formula (1) and a quinacridone pigment represented by Formula (2):Type: GrantFiled: May 15, 2009Date of Patent: October 30, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Naohiro Hirose, Hiroyuki Yasukawa, Natsuko Kusaka, Miyuki Murakami, Yohei Ohno
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Publication number: 20120202149Abstract: An electrophotographic toner and a method of preparing the same, the electrophotographic toner including a binder that includes two kinds of resin having different weight average molecular weights, a colorant, and a releasing agent.Type: ApplicationFiled: February 7, 2012Publication date: August 9, 2012Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jun-young LEE, Kyeong Pang, Tae-hoe Koo, Su-bum Park, Ju-yeon Lee
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Publication number: 20120141931Abstract: A negatively charged polymerized toner having high charging performance, which comprises a charge control agent particularly useful for color toners and polymerized toners, the charge control agent comprising a cyclic phenol sulfide as an active ingredient, which speeds up charging risetime, has a high charge amount and charging characteristics particularly excellent in environmental stability, and is safe since it does not have any problem with the waste regulations.Type: ApplicationFiled: August 5, 2010Publication date: June 7, 2012Inventors: Masateru Yasumura, Masami Ito, Motonori Tsuji, Masataka Sawano, Kanae Hiraishi, Masaya Tojou
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Patent number: 8093342Abstract: Provided are a novel polymer having a sulfonic group, a sulfonic acid ester group, or a derivative thereof incorporated therein, a method of producing the polymer, and a novel compound suitable for producing the polymer. A polymer is characterized by containing a unit represented by the following formula (1): wherein R1w and R1x are each independently a halogen atom or a hydrogen atom, R1y is a CH3 group or a hydrogen atom, and any one of R1a, R1b, and R1c is a sulfonate group represented by SO3R1f.Type: GrantFiled: July 23, 2010Date of Patent: January 10, 2012Assignee: Canon Kabushiki KaishaInventors: Masato Minami, Tatsuki Fukui, Takashi Kenmoku, Tetsuya Yano, Takeshi Ikeda, Norikazu Fujimoto, Atsushi Tani
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Publication number: 20110300480Abstract: The present disclosure relates to a toner including a core comprising at least one amorphous resin, at least one crystalline resin and one or more optional ingredients such as optional colorants, optional waxes, gels, and combinations thereof. The toner also includes a shell having an environmentally friendly charge control agent co-emulsified with at least one amorphous shell resin.Type: ApplicationFiled: August 21, 2011Publication date: December 8, 2011Applicant: XEROX CORPORATIONInventors: Ke Zhou, Karen Ann Moffat, Richard P.N. Veregin, Cuong Vong
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Patent number: 8039186Abstract: A toner for developing an electrostatic image comprises: a binder resin; and a releasing agent, wherein the binder resin comprises a polycondensation resin obtained by polycondensing a polycondensation monomer in the presence of a polycondensation catalyst, the releasing agent comprises a condensation compound obtained by condensing a condensation monomer in the presence of a condensation catalyst, the toner contains a metallic element derived from the polycondensation catalyst and the condensation catalyst in an amount of from 0 to 10 ppm, and the toner contains a sulfur component in an amount of from 100 to 20,000 ppm.Type: GrantFiled: August 18, 2006Date of Patent: October 18, 2011Assignee: Fuji Xerox Co., Ltd.Inventors: Yuki Sasaki, Fumiaki Mera, Satoshi Hiraoka, Hirotaka Matsuoka, Yasuo Matsumura
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Publication number: 20110244386Abstract: A toner includes a toner particle, which contains at least a binding resin, a colorant, and two types of polar resins, i.e., a polar resin H and a polar resin L, and which is obtained with granulation in a water-based medium, wherein solubility parameters, glass transition points, and weight-average molecular weights of the binding resin, the polar resin H, and the polar resin L, as well as amounts of the added resins satisfy respective specific relationships.Type: ApplicationFiled: March 30, 2011Publication date: October 6, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Kenta Kamikura, Shinya Yachi, Kazumi Yoshizaki, Yasushi Katsuta, Takeshi Kaburagi
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Publication number: 20110236815Abstract: The present disclosure provides carriers for use with toner compositions. In embodiments, a carrier may include a core having a polymeric coating on at least a portion thereof. The polymer coating possesses cation binding groups. Processes for coating such carriers with the polymeric coatings are also provided.Type: ApplicationFiled: March 23, 2010Publication date: September 29, 2011Applicant: XEROX CORPORATIONInventors: Richard P.N. Veregin, Daryl W. Vanbesien, Michael S. Hawkins, Corey L. Tracy
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Publication number: 20110123920Abstract: The present invention is toner particle that includes a continuous phase of binder polymer and a second phase of hydrocolloid. The particle has a porosity of at least 10 percent.Type: ApplicationFiled: December 7, 2010Publication date: May 26, 2011Inventors: Mridula Nair, Xiqiang Yang, Tamara K. Jones, Jason Morgan
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Publication number: 20110097660Abstract: Provided is a toner in which faulty transfer under an extremely-low-temperature, low-humidity environment hardly occurs, including toner particles and a zeolite as an external additive, in which a ratio of the alminium atoms to a total of the silicon atoms and the aluminium atoms contained in the zeolite is 0.2 to 24.0%.Type: ApplicationFiled: October 20, 2010Publication date: April 28, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Akira Sugiyama, Katsuyuki Nonaka, Koji Abe, Yasuhiro Hashimoto, Naoya Isono, Yuhei Terui
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Patent number: 7901858Abstract: The present invention discloses a mixed cyclic phenol sulfide which is a mixture of the cyclic phenol sulfide wherein m is 8 and the cyclic phenol sulfide wherein m is an integer other than 8, the cyclic phenol sulfide being represented by the following formula (1): wherein R is a straight or branched alkyl group having 1 to 6 carbon atoms, and m is an integer from 4 to 9; or a cyclic phenol sulfide of formula (1) wherein m is 8. The present invention also discloses a charge control agent which comprises the above sulfide(s) as the active ingredient; and a toner which comprises the charge control agent, a coloring agent and a binder resin. This charge control agent is particularly useful for color toners, and it speeds up charging risetime, and has a high charge amount and charging characteristics excellent in the environmental stability. Further, the charge control agent is safe since it does not have any problem with the waste regulations.Type: GrantFiled: September 29, 2008Date of Patent: March 8, 2011Assignee: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masafumi Umekawa, Masaki Okubo, Hideyuki Otsuka, Jun Watanabe
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Publication number: 20110045396Abstract: The present invention discloses a charge control agent which comprises a metal compound of a cyclic phenol sulfide of the following formula (1) as an active ingredient: wherein at least one of several Y is a metal atom. The present invention also discloses a toner which comprises one or more kinds of said metal compound, a coloring agent and a binder resin. The charge control agent of the present invention overcomes disadvantages such as lack of sharpness of first copied images and instability of the quality of the copied images in continuously copying, and it is those applicable to recent high speed printers, which have a quick charging rise time, an excellent environmental stability since the charge amount thereof less varies depending on the changes of temperature and humidity, and a high frictional charge amount. In addition, by using said charge control agent, a toner having a negative electric with high charging performance can be provided.Type: ApplicationFiled: May 8, 2009Publication date: February 24, 2011Inventors: Masateru Yasumura, Masami Ito, Yoshikazu Aoki, Masaki Okubo, Hideyuki Otsuka, Jun Watanabe
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Publication number: 20110027713Abstract: The disclosure provides an electrophotographic toner including a binder resin; and a light absorber, wherein the light absorber includes a metal nanorod and a surfactant covering a surface of the metal nanorod.Type: ApplicationFiled: July 19, 2010Publication date: February 3, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Moon-il JUNG, Seung-Jin Oh, Eun-ha Lee
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Publication number: 20100323289Abstract: The present invention relates to chemical toner compositions comprising a resin and a polymer modified pigment comprising a pigment having attached at least one polymeric group. The polymer modified pigment comprises the reaction product or combination product of a modified pigment comprising the pigment having attached at least one organic group which comprises at least one first functional group, and at least one polymer comprising at least one second functional group.Type: ApplicationFiled: June 16, 2010Publication date: December 23, 2010Inventors: Joseph B. Carroll, Qingling Zhang
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Patent number: 7851112Abstract: A photoconductor containing an optional supporting substrate, a thiophosphate containing photogenerating layer, and a charge transport layer which includes a polyhedral oligomeric silsesquioxane (POSS)-containing material and an optional thiophosphate.Type: GrantFiled: November 28, 2006Date of Patent: December 14, 2010Assignee: Xerox CorporationInventors: Jin Wu, Kenny-Tuan Dinh, Kathleen M. Carmichael, Michael S. Roetker, Liang-Bih Lin
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Patent number: 7842446Abstract: An object of the present invention is to provide a toner excellent in durability and storage stability, and having good fixing performance in a wide fixing temperature region even at a high process speed. According to the present invention, there is provided a toner containing: a binder resin; a colorant; and a polyester resin, in which: I) the polyester resin contains at least, as a main component, polyester obtained by subjecting a monomer composition containing an alcohol selected from aliphatic diols each having 2 to 22 carbon atoms and a carboxylic acid selected from aliphatic dicarboxylic acids each having 2 to 22 carbon atoms to a polycondensation reaction; and II) a region having a lamellar structure is present at a surface layer of the toner.Type: GrantFiled: September 13, 2005Date of Patent: November 30, 2010Assignee: Canon Kabushiki KaishaInventors: Eriko Yanase, Michihisa Magome, Takashi Matsui, Akira Sakakibara
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Publication number: 20100297546Abstract: Toner particles are provided which may, in embodiments, include a core and a shell. In embodiments, charge control agents may be co-emulsified with a resin utilized to form a shell. The shell may prevent a crystalline resin in the core from migrating to the toner surface. Inclusion of the charge control agent in the shell itself may provide the resulting toner particles with desirable charge characteristics and sensitivity to relative humidity.Type: ApplicationFiled: May 20, 2009Publication date: November 25, 2010Applicant: Xerox CorporationInventors: Ke Zhou, Maria N.V. McDougall, Karen A. Moffat, Richard P.N Veregin, Enno E. Agur
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Publication number: 20100291482Abstract: Provided are a novel polymer having a sulfonic group, a sulfonic acid ester group, or a derivative thereof incorporated therein, a method of producing the polymer, and a novel compound suitable for producing the polymer. A polymer is characterized by containing a unit represented by the following formula (1): wherein R1w and R1x are each independently a halogen atom or a hydrogen atom, R1y is a CH3 group or a hydrogen atom, and any one of R1a, R1b, and R1c is a sulfonate group represented by SO3R1f.Type: ApplicationFiled: July 23, 2010Publication date: November 18, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Masato Minami, Tatsuki Fukui, Takashi Kenmoku, Tetsuya Yano, Takeshi Ikeda, Norikazu Fujimoto, Atsushi Tani
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Publication number: 20100239968Abstract: Toner compositions for electrophotographic printing are disclosed, along with methods for making such toners, and printing systems utilizing them. The disclosed process imparts qualities to the toner making it more efficiently and effectively incorporated into printed images.Type: ApplicationFiled: November 30, 2007Publication date: September 23, 2010Inventors: Sivapackia Ganapathiappan, Manoj K. Bhattacharyya, Hou T. Ng
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Patent number: 7759035Abstract: An object is to provide an electrostatic charge image developing toner and an image forming method using the same capable of maintaining image properties for a long duration, which exhibit not only sufficient transparency and chromaticness, accompanied with high color reproduction and excellent charging characteristic, but also excellent heat resistance, together further with excellent light fastness and sufficient image holding ability. Disclosed is an electrostatic charge image developing toner of the present invention comprising a binder resin for toner particle formation and colorant particles dispersed in the binder resin, wherein the colorant particles comprise a dye and an antioxidant. Further, the electrostatic charge image developing toner wherein a volume-based median particle diameter of the colorant particles is preferably 10-100 nm, and also the dye contained in the colorant particles is preferably an oil-soluble dye or a metal chelate dye.Type: GrantFiled: December 1, 2006Date of Patent: July 20, 2010Assignee: Konica Minolta Business Technologies, Inc.Inventors: Hidetaka Ninomiya, Mikio Kouyama, Takato Chiba, Kenji Hayashi, Hiroyuki Yasukawa
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Patent number: 7740999Abstract: To achieve improvements in developing performance, transferring performance, and fixing performance, a toner has a glass transition temperature (TgA) of 40 to 60° C. and a temperature (P1) of the highest peak of 70 to 120° C.; cyclohexane (CHX) insoluble matter in the tetrahydrofuran (THF) soluble matter of the toner has a glass transition temperature (TgB) of 80 to 120° C.; TgA and TgB satisfy a specific formula; the toner has a viscosity at 100° C. of 5,000 to 30,000 Pa·s; and the cyclohexane (CHX) insoluble matter has an acid value of 5 to 40 mgKOH/g.Type: GrantFiled: August 5, 2008Date of Patent: June 22, 2010Assignee: Canon Kabushiki KaishaInventors: Koji Inaba, Kazumi Yoshizaki, Yasushi Katsuta
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Patent number: 7732116Abstract: The present invention is an electrophotographic photoconductor having a photosensitive layer on a conductive substrate. The photosensitive layer contains N-arylphthalimides additives.Type: GrantFiled: September 27, 2007Date of Patent: June 8, 2010Assignee: Eastman Kodak CompanyInventors: David S. Weiss, William T. Gruenbaum, John C. Wilson
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Publication number: 20100129749Abstract: A polymerized toner is provided. The polymerized toner has cores containing a wax with a polydispersity of 1.05 to 1.1. The fixability of the polymerized toner is improved by the presence of the wax. Further provided is a method of producing the polymerized toner.Type: ApplicationFiled: November 18, 2009Publication date: May 27, 2010Applicant: LG CHEM LTD.Inventors: Wook JANG, Chang Soon LEE, Woo Cheul JUNG
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Patent number: 7709172Abstract: The present invention discloses an oxidized mixed cyclic phenol sulfide which is a mixture of the oxidized cyclic phenol sulfide wherein m is 8 and the oxidized cyclic phenol sulfide wherein m is an integer other than 8, the oxidized cyclic phenol sulfide being represented by the following formula (1): wherein R is a straight or branched alkyl group having 1 to 6 carbon atoms, m is an integer from 4 to 9, and n is 1 or 2; or an oxidized cyclic phenol sulfide of formula (1) wherein m is 8. The present invention also discloses a charge control agent which comprises the above sulfide(s) as the active ingredient; and a toner which comprises the charge control agent, a coloring agent and a binder resin. This charge control agent is particularly useful for color toners, and it speeds up charging risetime, and has a high charge amount and charging characteristics excellent in environmental stability. Further, the charge control agent is safe since it does not have any problem with the waste regulations.Type: GrantFiled: October 10, 2008Date of Patent: May 4, 2010Assignee: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masafumi Umekawa, Masaki Okubo, Hideyuki Otsuka, Jun Watanabe
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Publication number: 20100104968Abstract: A polymerized toner is provided. The polymerized toner comprises a reactive anionic surfactant having at least one reactive functional group. The reactive anionic surfactant is added simultaneously with a dispersant to prepare an aqueous dispersion or is added within 2 hour after a polymerization reaction of a monomer mixture is initiated in an aqueous dispersion. This simultaneous or rapid addition allows the reactive anionic surfactant to be dispersed on the surface of the toner particles. The reactive anionic surfactant is located over the entire surface of the toner particles to increase the surface charge density of the toner, achieving good charge stability and excellent imaging characteristics.Type: ApplicationFiled: October 23, 2009Publication date: April 29, 2010Inventors: Dong Jin Park, Chang Soon Lee, Wook Jang, Yu Na Kim, Jung Woo Kim