Identified Carbon Black Adjuvant Patents (Class 430/108.9)
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Patent number: 10476082Abstract: The present invention relates to a surface coated positive electrode active material, a preparation method thereof, and a lithium secondary battery including the same. More specifically, it relates to a positive electrode active material of which surface is coated with a nanofilm including polyimide (PI) and carbon black, a preparation method thereof, and a lithium secondary battery including the same. The positive electrode active material of which surface is coated with the nanofilm according to the present invention is capable of preventing direct contact of the positive electrode active material with an electrolyte thereby suppressing a side reaction between the positive electrode active material and the electrolyte, and as a result, a lifespan property of a lithium secondary battery using a positive electrode including the same may be significantly improved, and particularly, a lifespan property and conductivity are capable of being enhanced under a high temperature and high voltage condition.Type: GrantFiled: August 26, 2015Date of Patent: November 12, 2019Assignees: LG Chem, Ltd., UNIST (Ulsan National Institute of Science and Technology)Inventors: Wook Jang, Sang Young Lee, Seung Beom Cho, Jun Seong Ahn, Jang Hoon Park, Ju Myung Kim
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Patent number: 10119031Abstract: The present invention relates to a method for recycling scrap rubber comprising the steps of pyrolyzing scrap rubber to obtain a char material and milling the thus obtained char material. The present invention also relates to carbon black powders and carbon black pellets obtained by the method according to the invention. Moreover, the present invention relates to the use of said carbon black powder and to compositions comprising said carbon black powders.Type: GrantFiled: January 6, 2017Date of Patent: November 6, 2018Assignee: BLACK BEAR CARBON B.V.Inventors: Arnoldus Henricus Adrianus Verberne, Jan Anne Jonkman, Christopher Michael Twigg
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Patent number: 9291930Abstract: Toner for developing an electrostatic latent image contains toner particles, the toner particles contain a resin and a pigment, the pigment includes a first pigment and a second pigment, the first pigment is carbon black, and the second pigment is C. I. Pigment Brown 23 and/or C. I. Pigment Brown 25.Type: GrantFiled: November 7, 2013Date of Patent: March 22, 2016Assignee: KONICA MINOLTA, INC.Inventors: Chiaki Yamada, Masahiro Anno
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Publication number: 20150056548Abstract: Provided are a propylene-based polymer useful for providing a toner that is excellent in offset resistance, can be fixed by using a low-temperature heating element and hardly has stickiness even after stored for a long period of time; and a toner including said propylene-based polymer. The present invention is directed to a propylene/?-olefin copolymer (A) which includes 60 to 90 mol % of structural units derived from propylene (a) and 10 to 40 mol % of structural units derived from ?-olefins having 4 or more carbon atom (b) wherein (a)+(b)=100 mol % and which satisfies: (i) a weight average molecular weight (Mw) as measured by GPC of 3,000 to 40, 000; (ii) a melting point (Tm) as measured by DSC of 60 to 90° C.; and (iii) a half width of a crystalline melting point peak as measured by DSC of 1 to 20° C.Type: ApplicationFiled: March 22, 2013Publication date: February 26, 2015Applicant: Mitsui Chemicals, Inc.Inventors: Kuniaki Kawabe, Hirotaka Kanaya, Toshiyuki Ito, Kan Komiya
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Patent number: 8951707Abstract: A toner, including: a crystalline resin containing a urethane bond, a urea bond, or both thereof; and a compound represented by the following General Formula (1), wherein an amount of the compound represented by the General Formula (1) is 0.01% by mass to 0.25% by mass: CnH2n+1R??General Formula (1) where n is 8 to 22 and R is COOH, NH2 or OH.Type: GrantFiled: August 29, 2013Date of Patent: February 10, 2015Assignee: Ricoh Company, Ltd.Inventors: Suzuka Amemori, Atsushi Yamamoto, Masahide Yamada, Yukiko Nakajima, Shinya Nakayama, Hideyuki Santo
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Patent number: 8852835Abstract: The present disclosure describes a black single component toner with desirable fusing performance.Type: GrantFiled: December 12, 2012Date of Patent: October 7, 2014Assignee: Xerox CorporationInventors: Grazyna E Kmiecik-Lawrynowicz, Michael F Zona, Mark E Mang, Maura A Sweeney, Robert D Bayley
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Patent number: 8846283Abstract: The present disclosure describes hyperpigmented toner compositions containing a mixture of insulative color pigments, which toners exhibit reduced dielectric loss and improved tribo-charging.Type: GrantFiled: November 28, 2012Date of Patent: September 30, 2014Assignee: Xerox CorporationInventors: Richard P N Veregin, Daryl W Vanbesien, Suxia Yang, Majid Kamel, Cuong Vong
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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: 20140147781Abstract: The present disclosure describes hyperpigmented toner compositions containing a mixture of insulative color pigments, which toners exhibit reduced dielectric loss and improved tribo-charging.Type: ApplicationFiled: November 28, 2012Publication date: May 29, 2014Applicant: XEROX CORPORATIONInventors: Richard P.N. Veregin, Daryl W. Vanbesien, Suxia Yang, Majid Kamel, Cuong Vong
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Publication number: 20140099577Abstract: The toner includes toner particles containing a polyester resin A, a polyester resin B and a colorant, the polyester resin A has a polyester portion including a segment capable of forming a crystal structure and a crystal nucleating agent segment, which is bonded to an end of the polyester portion, and the polyester resin B is a resin which is free of any segments capable of forming a crystal structure, the polyester resin B has a weight average molecular weight Mwb by GPC of a THF soluble matter of 3000 or more and 100000 or less, and an SP value Sa ((cal/cm3)1/2) of the polyester portion of the polyester resin A and an SP value Sb ((cal/cm3)1/2) of the polyester resin B satisfy the following relationships: 9.00?Sa?10.50 ?0.40?Sb?Sa?0.80.Type: ApplicationFiled: December 12, 2013Publication date: April 10, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Shuhei Moribe, Kosuke Fukudome, Satoshi Mita, Kazuo Terauchi, Yojiro Hotta, Tetsuya Ida
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Patent number: 8603721Abstract: Disclosed is a process for preparing toner particles which comprises: (a) selecting a carbon black; (b) measuring the surface level of sulfur of the carbon black by X-ray Photoelectron Spectroscopy to ensure that the surface level of sulfur is no more than about 0.05 atomic percent; and (c) mixing the carbon black with a resin to generate a toner composition.Type: GrantFiled: April 6, 2011Date of Patent: December 10, 2013Assignee: Xerox CorporationInventors: Thomas P Debies, Timothy L Lincoln, Kevin F Marcell
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Publication number: 20130295501Abstract: Disclosed herein is a method of making a modified pigment, comprising: reacting, under Mitsunobu conditions: (a) a first reactant comprising a protonated nucleophile having a pKa<15, and (b) a second reactant comprising a hydroxyl-containing organic group, wherein a pigment is attached to either the first or second reactant. The method further comprises forming the modified pigment having attached an organic species comprising the nucleophile bonded to the organic group, with the net elimination of a proton and a hydroxyl. Also disclosed herein are modified pigments, which can have applications in chemical toners, inkjet ink and electrophoretic ink compositions, black matrix materials, color filters, and coatings.Type: ApplicationFiled: March 12, 2013Publication date: November 7, 2013Applicant: CABOT CORPORATIONInventors: Qingling Zhang, Lynne K. LaRochelle Richard
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Publication number: 20130252160Abstract: A toner for forming an electrophotographic image is provided, wherein the toner includes at least four types of binder resins, wherein the binder resins includes at least: a crystalline polyester resin (A); a non-crystalline resin (B); a non-crystalline resin (C); and a composite resin (D) which includes a condensation polymerization resin unit and an addition polymerization resin unit, wherein the non-crystalline resin (B) includes a chloroform insoluble matter, wherein the non-crystalline resin (C) has a softening temperature (T½) lower than that of the non-crystalline resin (B) by 25° C. or more, and wherein the toner has a main peak between 1,000 to 10,000 in a molecular weight distribution obtained by GPC from a tetrahydrofuran soluble matter, and the toner has a half-value width of the molecular weight distribution of 15,000 or less.Type: ApplicationFiled: September 14, 2012Publication date: September 26, 2013Inventors: Masashi NAGAYAMA, Mitsuo Aoki, Hisashi Nakajima, Saori Yamada, Mariko Takii
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Patent number: 8426093Abstract: An electrophotographic photoreceptor including a photosensitive layer provided including a first functional layer including a compound represented by the following Formula (I). In Formula (I), F represents an n-valent organic group having hole transportation ability; R1, R2, and R3 each independently represents a hydrogen atom, a halogen atom, or a monovalent organic group; L represents a divalent organic group; n represents an integer of 1 to 4; and j represents an integer of 0 or 1.Type: GrantFiled: September 28, 2007Date of Patent: April 23, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Wataru Yamada, Katsumi Nukada, Masahiro Iwasaki, Kazuhiro Koseki
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Patent number: 8409776Abstract: A toner for developing an electrostatic image, contains a binder resin having an acid value of from approximately 10 mgKOH/g to approximately 20 mgKOH/g and carbon black having a surface carboxyl group density of from approximately 2×10?6 mol/m to approximately 8×10?6 mol/m2, and is prepared in an aqueous medium.Type: GrantFiled: April 7, 2011Date of Patent: April 2, 2013Assignee: Fuji Xerox Co., Ltd.Inventor: Soichiro Kitagawa
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Patent number: 8394567Abstract: There is provided a toner for electrostatic latent image developing, which includes a binder resin; a carbon black-surface treated with an isocyanate compound including a plurality of isocyanate groups which include one or more isocyanate groups that are not bonded to the carbon black; and a release agent having an acid value of about 5 mgKOH/g or higher and/or a hydroxyl value of about 5 mgKOH/g or higher.Type: GrantFiled: March 17, 2010Date of Patent: March 12, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Satoshi Kamiwaki, Akira Matsumoto, Sakon Takahashi
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Patent number: 8394563Abstract: A chemical toner is described as well as methods of preparing the same.Type: GrantFiled: June 6, 2008Date of Patent: March 12, 2013Assignee: Cabot CorporationInventors: Anne K. Shim, Eugene N. Step, Agathagelos Kyrlidis
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Publication number: 20120308925Abstract: The present disclosure describes a hyperpigmented low melt black toner containing a thermal carbon black which exhibits reduced dielectric loss and improved tribo charging.Type: ApplicationFiled: May 30, 2011Publication date: December 6, 2012Applicant: XEROX CORPORATIONInventors: Daryl W. Vanbesien, Magid Kamel, Cuong Vong, Suxia Yang, Kimberly D. Nosella, Richard P.N. Veregin, Tie Hwee Ng
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Patent number: 8293443Abstract: A toner formulation is disclosed comprising a binder and an IR absorbing black pigment at a concentration of 0.25-2.0% by weight, including one or more infrared transmissive pigments, wherein the infrared transmissive pigments are configured to provide a black color. Such toner formulation may provide a response to a toner patch sensor to indicate a mass per unit area of 0.1-1.5 mg/cm2 or a reflectance relative to a substrate to define a reflectance ratio that varies relative to L* values for the toner over the range L*=0-50 or a bulk reflectivity of greater than 6.0% for a portion of the wavelength range of 850-2000 nanometers.Type: GrantFiled: October 12, 2007Date of Patent: October 23, 2012Assignee: Lexmark International, Inc.Inventors: Albert Mann Carter, Jr., Gary Allen Denton, Joseph Edward Johnson, John Melvin Olson, Trent Peter, Cary Patterson Ravitz, Tao Yu
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Patent number: 8268524Abstract: A black toner includes: toner mother particles containing carbon black as a colorant and a binder resin, the toner mother particles being surface-modified with a polyalkyleneimine.Type: GrantFiled: June 30, 2009Date of Patent: September 18, 2012Assignee: Seiko Epson CorporationInventors: Masahiro Oki, Yoshihiro Ueno
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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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Patent number: 8236472Abstract: Provided is a method for forming an image with a set of electrostatic charge image developing toners using a digital electrophotographic method, provided that the set of electrostatic charge image developing toners comprises a black toner and a light gray toner, the method comprising the steps of: forming an electrostatic latent image on an image support; developing the electrostatic latent image with the black toner to form a black toner image; developing the electrostatic latent image with the light gray toner to form a light gray toner image; and fixing the black toner image and the light gray toner image, wherein the black toner and the light gray toner each independently contains a wax having an endothermic peak in the range of 60 to 105° C.; and the light gray toner has a transmittance in the range of 40 to 90%.Type: GrantFiled: November 24, 2009Date of Patent: August 7, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Tatsuya Fujisaki, Kaori Soeda, Shinya Obara, Natsuko Kusaka
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Patent number: 8192906Abstract: A black toner formulation includes at least one non-black colorant selected from the group consisting of dyes, pigments, and combinations thereof. The black toner formulation has a total pigment loading of about 2 percent to less than or equal to about 9.5 percent by weight of total weight of the black toner formulation.Type: GrantFiled: March 13, 2009Date of Patent: June 5, 2012Assignee: Lexmark International, Inc.Inventor: Gary Allen Denton
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Publication number: 20120115080Abstract: A toner for developing an electrostatic image, contains a binder resin having an acid value of from approximately 10 mgKOH/g to approximately 20 mgKOH/g and carbon black having a surface carboxyl group density of from approximately 2×10?6 mol/m to approximately 8×10?6 mol/m2, and is prepared in an aqueous medium.Type: ApplicationFiled: April 7, 2011Publication date: May 10, 2012Applicant: FUJI XEROX CO., LTD.Inventor: Soichiro KITAGAWA
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Publication number: 20120107736Abstract: The present invention relates to a process for preparing a polymerized toner, and in particular to a process for preparing a polymerized toner and a polymerized toner prepared therefrom, wherein a certain block copolymer and copper phthalocyanine are used within a predetermined range of the amounts for a carbon black dispersant during a suspension polymerization, thereby making it possible to realize a narrow particle sizes distribution, high transcription efficiency, and an enhanced image concentration.Type: ApplicationFiled: September 23, 2011Publication date: May 3, 2012Applicant: LG CHEM, LTDInventors: Wook JANG, Chang-Soon LEE, Dong-Jin PARK, Jung-Woo KIM
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Publication number: 20120087698Abstract: A developer includes a binder resin, a carbon black, and a black charge control agent. When an amount of the binder resin is 100 parts by weight, a blending quantity of the carbon black is set in a range of 3.0 to 7.0 parts by weight, both inclusive, and a blending quantity of the black charge control agent is set in a range of 0.3 to 1.2 parts by weight, both inclusive.Type: ApplicationFiled: October 3, 2011Publication date: April 12, 2012Applicant: OKI DATA CORPORATIONInventor: Yuichi FURUKAWA
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Publication number: 20120070772Abstract: 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: ApplicationFiled: February 22, 2011Publication date: March 22, 2012Applicant: FUJI XEROX CO., LTD.Inventors: Atsushi SUGAWARA, Shinpei TAKAGI, Atsushi SUGITATE, Daisuke NOGUCHI
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Patent number: 8133647Abstract: A toner formulation is disclosed comprising a binder, an IR absorbing colorant, and one or more infrared transmissive colorants, wherein the colorants are configured to provide a low reflectivity in the visible region of the spectrum and an intermediate reflectivity in the near infrared region of the spectrum when the toner is printed and fused onto paper.Type: GrantFiled: January 29, 2008Date of Patent: March 13, 2012Assignee: Lexmark International, Inc.Inventors: Gary Allen Denton, Cary Patterson Ravitz
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Publication number: 20110236816Abstract: The invention relates to carbon black having a C-14 content greater than 0.05 Bq/g and a ratio ?D50/Dmode of the aggregate size distribution of less than 0.7. The carbon black is produced by thermal oxidative pyrolysis or thermal cleavage of the carbon black raw material in that the carbon black raw material contains renewable carbon black raw materials and an oxygen deficiency is present in the pyrolysis/cleavage reaction. The carbon blacks can be used in rubber and rubber mixtures, plastic, printing inks, inks, inkjet inks, toners, lacquers, paints, paper, adhesives, batteries, pastes, bitumens, concrete, and other building materials and as reducing agents in metallurgy.Type: ApplicationFiled: October 9, 2009Publication date: September 29, 2011Applicant: Evonik Carbon Black GmbHInventors: Michael Stanyschöfsky, Gernot Meinerzhagen, Paul Messer, Joachim Fröhlich
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Publication number: 20110229811Abstract: The invention provides a toner for developing an electrostatic image including toner particles having a shape factor SF1 of 110 or more and including a binder resin, and particles of an external additive that adhere to the toner particles, wherein the particles of the external additive including first particles, and second particles which are adhered to the first particles and have a primary particle size of 0.2 times to 0.5 times as large as that of the first particles, and in an image obtained by observing the particles of the external additive with a microscope, when the projection surface area of the first particle is defined as S1 and the total of the projection surface areas of the second particles which are not hidden by the first particle is defined as S2, S2 being from 0.1 times to 0.5 times as large as S1.Type: ApplicationFiled: August 9, 2010Publication date: September 22, 2011Applicant: FUJI XEROX CO., LTD.Inventors: Yutaka SAITO, Michio Take, Yoshifumi Iida, Sakon Takahashi, Motoko Sakai, Katsuyuki Kitajima
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Publication number: 20110076608Abstract: Carbon black with a content of polycyclic aromatic hydrocarbons measured by the 22 PAH method of less than 5 ppm and an STSA surface area of <90 m2/g. The carbon black is prepared by treating the starting carbon black with electromagnetic radiation. The carbon black can be used in rubber, plastics, printing inks, liquid inks, inkjet inks, toners, coating materials, paints, adhesives, batteries, pastes, paper, fuel cells, bitumen, concrete and other building materials.Type: ApplicationFiled: September 16, 2010Publication date: March 31, 2011Applicant: Evonik Degussa GmbHInventors: Klaus BERGEMANN, Manfred Dannehl, Ansgar Oelmann, Britta Schwartze, Christoph Tontrup
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Publication number: 20110020744Abstract: Use of a wax in a toner, such as carnauba wax, to give an increase in charge control agent in a toner, such as a magenta toner, to give an increased glass transition temperature is disclosed. The toner may contain a resin comprising amorphous and crystalline polyesters to provide good low melt characteristics.Type: ApplicationFiled: October 5, 2010Publication date: January 27, 2011Applicant: XEROX CORPORATIONInventors: Mark E. Mang, Eugene F. Young
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Publication number: 20110014559Abstract: The present disclosure provides violet toners and methods for their production. In embodiments, methods of the present disclosure include systems which may be utilized to predict the color properties of a violet toner, thereby permitting adjustment of the pigment loading and/or target mass per unit area.Type: ApplicationFiled: July 20, 2009Publication date: January 20, 2011Applicant: XEROX CORPORATIONInventors: Jordan H. Wosnick, Suxia Yang, Richard P.N. Veregin, Karen A. Moffat
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Publication number: 20100248120Abstract: The invention relates to a method for producing carbon black or other flame aerosols, comprising the following steps: the heat is removed from the flame by dissipation and/or radiation; a thin gas boundary layer is formed; the flow formed by the flame and the gas boundary layer is accelerated or expanded; the obtained aerosol is withdrawn; and the cooling surface is cleaned. The invention further relates to a device for carrying out such a method and a black carbon having a maximum pH value of 6.0, a maximum ignition residue of 0.1 percent, and a maximum 5 ?m screening refuse of 200 ppm. The inventive black carbon can be used in rubber, plastic, printing inks, inks, inkjet inks, toners, lacquers, dyes, paper, bitumen, concrete, and other construction materials.Type: ApplicationFiled: June 10, 2010Publication date: September 30, 2010Applicant: Evonik Degussa GmbHInventors: Ulrich RIEBEL, Matthias Katzer, Kai Krauss, Alfons Karl, Jürgen Behnisch
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Publication number: 20100239969Abstract: A bio-toner for use in electrophotographic image forming that contains a bio-resin component that is at least partially derived from a renewable resource is provided. A method of making the bio-toner that contains a bio-resin component for use in electrophotographic image forming is also provided. A method for electrophotographic image formation using the bio-toner that contains a bio-resin is also provided.Type: ApplicationFiled: March 19, 2010Publication date: September 23, 2010Applicant: MITSUBISHI KAGAKU IMAGING CORPORATIONInventors: Takeshi OWADA, David Urban
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Publication number: 20100167195Abstract: A chemical toner is described as well as methods of preparing the same.Type: ApplicationFiled: November 24, 2009Publication date: July 1, 2010Inventors: Anne K. Shim, Eugene N. Step, Agathagelos Kyrlidis
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Patent number: 7655372Abstract: The present invention relates to toner compositions comprising a resin and a colorant. Various embodiments of the colorant used in the toner compositions are disclosed, including a modified pigment comprising a pigment having attached at least one organic group having the formula —X—I, wherein X, which is directly attached to the pigment, represents an arylene or heteroarylene group, or an alkylene group, and I represents a non-polymeric group comprising at least one ionic group or at least one ionizable group. Processes for preparing toner compositions are also described.Type: GrantFiled: January 24, 2006Date of Patent: February 2, 2010Assignee: Cabot CorporationInventors: Eugene N. Step, Agathagelos Kyrlidis
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Publication number: 20090317737Abstract: A color toner is provided which has a dielectric strength equal to or lower than that of a black toner containing carbon black, and which has an improved charging rate and charge stability against changes in the environment.Type: ApplicationFiled: April 10, 2009Publication date: December 24, 2009Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hisao Okada, Mitsuru Oikawa
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Patent number: 7632618Abstract: A method for manufacturing polyhydroxyalkanoate-containing structure, at least a part of a base material surface of the structure being coated with polyhydroxyalkanoate, the method comprises the steps of immobilizing a polyhydroxyalkanoate synthase on the base material surface, synthesizing, on the base material surface, polyhydroxyalkanoate using a 3-hydroxyacyl coenzyme A to become the substrate of the synthase and the synthase and coating at least a part of the base material surface with the synthesized polyhydroxyalkanoate, wherein the synthase contains an amino acid sequence capable of binding to the base material.Type: GrantFiled: July 21, 2008Date of Patent: December 15, 2009Assignee: Canon Kabushiki KaishaInventors: Tsuyoshi Nomoto, Tetsuya Yano, Shinya Kozaki, Tsutomu Honma
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Publication number: 20090233203Abstract: The present invention provides a toner comprising core particles that contain at least first resin particles, colorant particles, and wax particles, in an aqueous medium, wherein the core particles contain nucleus particles in which the first resin particles and the colorant particles are aggregated and particles in which the first resin particles and the wax particles are aggregated. Accordingly, the treatment time for forming the core particles can be shortened, generation of colorant particles or wax particles that are not aggregated but suspended in a liquid can be suppressed, and particles having a small particle size and a sharp particle size distribution can be formed without classification, by suppressing an increase in the size of core particles.Type: ApplicationFiled: December 5, 2006Publication date: September 17, 2009Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yasuhito Yuasa, Hidekazu Arase, Kazuhiro Yanagi
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Publication number: 20090162775Abstract: The present invention is an ink comprising a solid phase and a liquid phase wherein the solid phase comprises a polymeric binder and the liquid phase comprises oil and a pigment, the solid phase and the liquid phase forming a discrete particle having multiple domains of the liquid phase.Type: ApplicationFiled: December 21, 2007Publication date: June 25, 2009Inventor: Mridula Nair
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Publication number: 20090109448Abstract: An electrostatic charge image developing carrier includes: a magnetic particle; and a resin coating layer that covers a surface of the magnetic particle with a resin, the resin coating layer containing an acid having a cyclic diterpene structure and either of carbon black or nigrosine dispersed therein.Type: ApplicationFiled: July 2, 2008Publication date: April 30, 2009Applicant: FUJI XEROX CO., LTD.Inventors: Fusako Kiyono, Taichi Yamada, Yosuke Tsurumi, Akira Matsumoto, Akihiro Iizuka, Tsuyoshi Murakami
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Publication number: 20090098476Abstract: A toner formulation is disclosed comprising a binder, an IR absorbing colorant, and one or more infrared transmissive colorants, wherein the colorants are configured to provide a low reflectivity in the visible region of the spectrum and an intermediate reflectivity in the near infrared region of the spectrum when the toner is printed and fused onto paper.Type: ApplicationFiled: January 29, 2008Publication date: April 16, 2009Inventors: Gary Allen Denton, Cary Patterson Ravitz
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Publication number: 20090087766Abstract: The present invention relates to a toner for developing electrostatic latent images, comprising carbon black having a number average particle size of Feret's diameter of 5 to 300 nm and containing primary particles at a content of 5% or more on a number basis. The toner of the present invention can prevent change of Q/M caused by adhesion of a carrier or a sleeve, and stable characteristics can be maintained for a long period without causing fogging or tone-flying.Type: ApplicationFiled: June 29, 2005Publication date: April 2, 2009Applicant: Konica Minolta Business Technologies, Inc.Inventors: Meizo Shirose, Ryuji Kitani
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Publication number: 20090081573Abstract: A toner for development of an electrostatic image includes at least a crystalline polyester resin and a colorant. The toner shows a dielectric loss index ?? of 0.1 or less at 0.1 Hz and 500 V at 30° C. and 90% RH.Type: ApplicationFiled: March 20, 2008Publication date: March 26, 2009Applicant: FUJI XEROX CO., LTD.Inventors: Eisuke IWAZAKI, Shuji SATO, Atsushi SUGAWARA, Hiroshi NAKAZAWA
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Publication number: 20090011347Abstract: The invention provides an electrophotographic toner having a crystalline polyester resin; a non-crystalline polyester resin; a colorant; and a releasing agent. A resin (i), that is included in a toluene-soluble component of the toner and having a molecular weight of 30,000 to 100,000 as measured by gel permeation chromatography relative to polystyrene standards, has an acid value A. A resin (ii), that is included in a toluene-soluble component of the toner and having a molecular weight of 8,000 to 12,000 as measured by gel permeation chromatography relative to polystyrene standards, has an acid value B. A resin (iii), that is included in a toluene-insoluble component of the toner, has an acid value C. The acid values A, B, and C satisfy the inequation of B>A>C. The invention further provides an electrophotographic developer using the toner, a toner cartridge storing the toner, and an image forming method using the developer.Type: ApplicationFiled: March 12, 2008Publication date: January 8, 2009Applicant: FUJI XEROX CO., LTD.Inventors: Katsumi DAIMON, Yutaka SUGIZAKI, Susumu YOSHINO, Hiroshi NAKAZAWA
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Publication number: 20090004589Abstract: The present invention provides toner containing core particles prepared by mixing and aggregating in an aqueous medium at least a first resin particle dispersion in which first resin particles are dispersed, a colorant particle dispersion in which particles of colorant are dispersed and a wax particle dispersion in which particles of wax are dispersed. The colorant contains carbon black having a DBP oil absorption of 45 to 70 (ml/100 g) and the wax contains a wax having an endothermic peak temperature (referred to as melting point Tmw1 (° C.)) according the DSC method of 50 to 90° C. It is thus possible to prepare toner that has a small particle size and a sharp particle size distribution without requiring a classification process and that can prevent transfer void and toner scattering during transfer and obtain high transfer efficiency. The present invention provides also a method for producing the toner.Type: ApplicationFiled: November 28, 2006Publication date: January 1, 2009Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yasuhito Yuasa, Mamoru Soga, Hidekazu Arase, Masahisa Maeda
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Patent number: 7303847Abstract: A dry toner is provided that is prepared by a method including the steps of (A) dissolving or dispersing a toner composition in an organic solvent to prepare a toner composition liquid and (B) dispersing the toner composition liquid in an aqueous liquid which contains a binder resin formed of a modified polyester (i) and a colorant containing a carbon black having a pH not greater than 7, wherein the toner has a volume average particle diameter (Dv) is from 3 to 7 ?m and a ratio of the volume average particle diameter (Dv) to a number average particle diameter (Dp) is from 1.00 to 1.25.Type: GrantFiled: December 1, 2003Date of Patent: December 4, 2007Assignee: Ricoh Company LimitedInventors: Masami Tomita, Toshiki Nanya, Shigeru Emoto, Shinichiro Yagi, Hiroshi Yamada, Naohiro Watanabe, Tadao Takigawa
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Patent number: 7070895Abstract: The present invention relates to a magnetic toner composition, and more particularly to a magnetic toner composition having an improved chargeability and excellent uniform chargeability, and that is capable of reducing a difference in electrostatic charge between a toner remaining in a cartridge or in a developing unit and that of a newly supplied toner. A magnetic toner composition of the present invention comprises magnetic toner particulate comprising a binder resin and a magnetic substance, a conductive fine powder having a specific surface area of 30 to 300 m2/g, a hydrophobic silica having a specific surface area of 100 to 240 m2/g, and an inorganic fine powder having an average diameter of 0.1 to 4.O ?m.Type: GrantFiled: December 20, 2002Date of Patent: July 4, 2006Assignee: LG Chem, Ltd.Inventors: In-Hee Lim, Chang-Soon Lee, Won-Sup Lee
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Patent number: 7052814Abstract: A toner for use in an oil-less fixing system free from an oil coating on a fixing roller, the toner includes a binder resin and a wax as well as carbon black having an oil absorption of 50 to 100 mL/100 g where the toner is the black toner or a coloring agent where the toner is the color toner, and wherein the binder resin has a rate of decrease of storage elastic modulus G? of not more than 0.3 Pa/° C. as determined in association with temperature increase in the range of 160 to 200° C. The binder resin preferably has a weight average molecular weight [Mw] of 10,000 to 200,000, an [Mw/Mn] ratio between [Mw] and a number average molecular weight [Mn] thereof in the range of 1 to 15, or a peak rate of decrease of the storage elastic modulus G? in the temperature range of 70 to 100° C. The toner suited for use in the oil-less fixing system and particularly suitable for forming a color image is provided.Type: GrantFiled: October 27, 2003Date of Patent: May 30, 2006Assignee: Kyocera Mita CorporationInventor: Keiichi Tanida