Carboxylic Acid Or Ester Compound Adjuvant Patents (Class 430/108.4)
-
Publication number: 20140072908Abstract: A toner including toner particles containing a binder resin, a colorant and a charge controlling agent, wherein the charge controlling agent is a polymer A having a structure “a” represented by formula (1), and the polymer A has a weight average molecular weight (Mw) of 1,000 to 100,000: wherein R1 represents a hydroxyl group, a carboxyl group, an alkyl group having 1 to 18 carbon atoms, or an alkoxyl group having 1 to 18 carbon atoms, R2 represents a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atoms, or an alkoxyl group having 1 to 18 carbon atoms, and g represents an integer of 1 to 3 and h represents an integer of 0 to 3, wherein when h is 2 or 3, R1 can be each independently selected.Type: ApplicationFiled: May 17, 2012Publication date: March 13, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Akane Masumoto, Hitoshi Itabashi, Takashi Kenmoku
-
Patent number: 8663886Abstract: The present disclosure provides polymeric additives for use with toner particles. The polymeric additive of the present disclosure includes a copolymer possessing at least one monomer having a high carbon to oxygen ratio, a monomer having more than one vinyl group, and at least one amine-functional monomer. Toners possessing this polymeric additive exhibit excellent stability with respect to relative humidity and excellent charging characteristics.Type: GrantFiled: December 21, 2010Date of Patent: March 4, 2014Assignee: Xerox CorporationInventors: Daryl W. Vanbesien, Richard P. N. Veregin, Suxia Yang, Corey L. Tracy, Karen Ann Moffat, Cuong Vong, Eric Rotberg, Michael S. Hawkins
-
Publication number: 20140057201Abstract: A method for producing a developing agent including preparing a dispersion liquid containing first fine particles containing a binder resin and second fine particles containing a color developable compound, a color coupler, and a color eraser, and aggregating the first and second fine particles in the dispersion liquid to form aggregated particles.Type: ApplicationFiled: August 27, 2013Publication date: February 27, 2014Applicant: TOSHIBA TEC KABUSHIKI KAISHAInventors: Takahito Kabai, Tsuyoshi Itou
-
Patent number: 8658340Abstract: A toner containing a binder resin comprising a first binder resin A and a second binder resin B, a coloring agent, and a releasing agent, wherein the first binder resin A is formed by reacting a compound A1 having an active hydrogen group with a resin A2 having a portion reactive with the compound A1 in an organic solvent and the resin A2 is formed by reacting a non-crystalline polyester resin “a” having a polyhydroxy carboxylic acid skeleton in the main chain with a compound having the portion reactive with the compound A1 having an active hydrogen group.Type: GrantFiled: May 9, 2011Date of Patent: February 25, 2014Assignee: Ricoh Company, Ltd.Inventors: Shingo Sakashita, Shinya Nakayama, Ryota Inoue, Yoshihiro Moriya, Akiyoshi Sabu, Yukiko Nakajima, Daiki Yamashita
-
Patent number: 8652724Abstract: The present invention is to provide a toner for developing electrostatic images having a low minimum fixing temperature, and high hot offset resistance and high heat-resistant shelf stability, and a method for producing the toner. Also, the present invention is to provide a toner for developing electrostatic images, comprising a binder resin, a colorant, a release agent and a retention aid, wherein the retention aid is a copolymer of 70 to 98% by weight styrene and 2 to 30% by weight (meth)alkyl acrylate, and the copolymer has a glass transition temperature of 5 to 60° C.Type: GrantFiled: November 23, 2011Date of Patent: February 18, 2014Assignee: Zeon CorporationInventor: Azusa Wada
-
Patent number: 8652723Abstract: A toner composition including a colorant-polyester polymer having at least one colorant and at least one polyester resin, an optional non-colorant polyester polymer, an optional additional colorant, an optional wax, and an optional additive, where the colorant is covalently linked to some or all of the polyester resin and the polyester resin is obtained by polymerizing a lactone using an enzyme catalyst. Methods for preparing a toner composition including an emulsion aggregation process.Type: GrantFiled: March 9, 2011Date of Patent: February 18, 2014Assignee: Xerox CorporationInventors: Santiago Faucher, Kimberly D. Nosella, Shigang S. Qiu
-
Patent number: 8637217Abstract: Disclosed is an decolorizable electrophotographic toner, containing a binder resin, an electron-donating color-developable agent, and a wax having a color-developing action and having an acid value of 60 mgKOH/g or more.Type: GrantFiled: May 18, 2010Date of Patent: January 28, 2014Assignee: Toshiba Tec Kabushiki KaishaInventors: Takayasu Aoki, Takahito Kabai, Tsuyoshi Itou
-
Patent number: 8632932Abstract: A toner including a binder resin comprising a resin (a) comprising a polyhydroxycarboxylic acid skeleton formed from an optically-active monomer. The polyhydroxycarboxylic acid skeleton has a weight average molecular weight of from 7,000 to 60,000. The binder resin comprises the polyhydroxycarboxylic acid skeleton in an amount of from 10 to 90% by weight. The optical purity X (%) of the polyhydroxycarboxylic acid skeleton represented by the following formula is 80% or less: X(%)=|X(L-isomer)?X(D-isomer)| wherein X(L-isomer) and X(D-isomer) represent molar ratio (%) of L-isomer and D-isomer of the optically-active monomer, respectively.Type: GrantFiled: December 30, 2009Date of Patent: January 21, 2014Assignee: Ricoh Company, LimitedInventors: Akiyoshi Sabu, Akihiro Kotsugai, Ryota Inoue, Keiko Osaka, Shingo Sakashita, Yukiko Nakajima, Satoshi Mochizuki
-
Patent number: 8632933Abstract: A developer for electrostatic latent image development including a positively chargeable toner and a fatty acid metal salt is used, in which the fatty acid metal salt is a metal salt selected from the group consisting of zinc, calcium, and magnesium salts of fatty acids of 12 to 20 carbon atoms and has a certain volume average particle diameter and particle size distribution.Type: GrantFiled: July 20, 2012Date of Patent: January 21, 2014Assignee: Kyocera Document Solutions Inc.Inventors: Masami Tujihiro, Yukinori Nakayama
-
Patent number: 8617780Abstract: The present disclosure provides white toner compositions and processes for making same. In embodiments, a desirable white toner may be produced without having to resort to excessive pigment loading, having desirable gloss characteristics.Type: GrantFiled: August 25, 2009Date of Patent: December 31, 2013Assignee: Xerox CorporationInventors: Yi Xin Gong, Daryl W. Vanbesien, Shigang Qiu, Edward Graham Zwartz, Karen Ann Moffat, Richard P. N. Veregin, Cuong Vong, C. Geoffrey Allen
-
Publication number: 20130344429Abstract: A toner for magnetic single-component development, which contains at least a binder resin which is a polyester resin, magnetic powder, and a charge control resin, wherein the ratio (%) of the area of the charge control resin present on the surface of the toner particles with respect to the area of the toner particles on an electron microscope image is made to be in a predetermined range corresponding to the particle diameter of the toner particles.Type: ApplicationFiled: June 18, 2013Publication date: December 26, 2013Inventors: Masashi Tamagaki, Takanori Tanaka
-
Patent number: 8614044Abstract: To provide a toner which can achieve both low-temperature fixing performance and dot reproducibility and further can obtain images on which any density non-uniformity has been kept from coming about, the toner has toner particles, each of the toner particles has a toner base particle containing a binder resin, a colorant and a release agent, and an inorganic fine powder; the toner having: (1) an average circularity of 0.960 or more; (2) a number-average molecular weight Mn(25° C.) of from 500 or more to 3,000 or less in measuring a tetrahydrofuran-soluble matter at 25° C. of the toner by SEC-MALLS; and (3) a value of Mn(135° C.)/Mn(25° C.) of from 25 or more to 50 or less which is the ratio of number-average molecular weight Mn(135° C.) in measuring an o-dichlorobenzene-soluble matter at 135° C. of the toner by SEC-MALLS to number-average molecular weight Mn(25° C.) in measuring a tetrahydrofuran-soluble matter at 25° C. of the toner by SEC-MALLS.Type: GrantFiled: June 13, 2011Date of Patent: December 24, 2013Assignee: Canon Kabushiki KaishaInventors: Takashi Matsui, Michihisa Magome, Yusuke Hasegawa, Tomohisa Sano, Shuichi Hiroko, Yoshitaka Suzumura, Shotaro Nomura, Atsuhiko Ohmori
-
Publication number: 20130337377Abstract: The disclosure describes a pigment treated with a rosin and a toner particle containing that rosin-treated pigment particle. The toner has a lower level of dielectric loss.Type: ApplicationFiled: August 19, 2013Publication date: December 19, 2013Applicant: XEROX CORPORATIONInventors: Ke Zhou, Rina Carlini, Daryl W. Vanbesien, Cuong Vong, Karen A. Moffat, Richard P.N. Veregin
-
Patent number: 8609312Abstract: A toner is provided which has toner particles containing a charging component and containing an aromatic compound represented by the following formula (1): wherein R1 to R3 each independently represent a hydrogen atom, a hydroxyl group, a carboxyl group, an alkyl group having 1 to 18 carbon atom(s) or an alkoxyl group having 1 to 18 carbon atom(s); R4 to R7 each independently represent a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atom(s) or an alkoxyl group having 1 to 18 carbon atom(s); R8 represents a hydrogen atom or a methyl group; and m represents an integer of 1 to 3.Type: GrantFiled: April 27, 2012Date of Patent: December 17, 2013Assignee: Canon Kabushiki KaishaInventors: Hitoshi Itabashi, Akane Masumoto, Takashi Kenmoku
-
Patent number: 8603714Abstract: A series of resins were synthesized using a range of bio-based materials to control the molecular architecture, and therefore the properties, of the inventive resins. The resins were formulated into toner formulations such as those useful in printers and copiers.Type: GrantFiled: February 14, 2011Date of Patent: December 10, 2013Assignees: Battelle Memorial Institute, Advanced Image Resources, LLCInventors: Bhima R. Vijayendran, Jerry L. King, II, Jeffrey Clark, Jan Bartus
-
Patent number: 8597865Abstract: An electrostatic-image-developing toner includes a polyester resin; two or more pigments; a polyethylene wax; and a polyolefin-polyvinyl-based graft copolymer, and satisfies the relationship represented by the following equation (1): 0.2?wd/wp?5.0??(1) wherein wp represents a total content (wt. %) of the pigments, and wd represents a content (wt. %) of the polyolefin-polyvinyl-based graft copolymer.Type: GrantFiled: February 3, 2010Date of Patent: December 3, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Daisuke Ishizuka, Shinichi Yaoi, Yasushige Nakamura
-
Patent number: 8592117Abstract: A toner including: a binder resin component; crystal nucleating agent; releasing agent; and colorant, wherein the binder resin component contains a crystalline polyester resin and a non-crystalline polyester resin, the crystal nucleating agent is at least one of an aliphatic ester compound and an aliphatic amide compound each having a melting point of 60° C. or higher but lower than 150° C., and wherein the toner satisfies Expressions (I) and (II): Tc>Tp+10??Expression (I) Tm>Tp+2??Expression (II) where Tp denotes lowest exothermic peak temperature [° C.] in 0° C. to 200° C. in DSC curve obtained DSC of the crystalline polyester resin, Tc denotes lowest exothermic peak temperature [° C.] in 0° C. to 200° C. in DSC curve obtained DSC of the crystal nucleating agent, and Tm denotes lowest exothermic peak temperature [° C.] in 0° C. to 200° C. in DSC curve through DSC of the mixture of the crystalline polyester resin and the crystal nucleating agent.Type: GrantFiled: December 23, 2011Date of Patent: November 26, 2013Assignee: Ricoh Company, Ltd.Inventors: Tsuyoshi Sugimoto, Hiroshi Yamashita, Daisuke Asahina, Masaki Watanabe, Satoyuki Sekiguchi, Rintaro Takahashi
-
Patent number: 8592116Abstract: A toner to develop an electrostatic charge image, a method of preparing the toner, a toner supply device employing the toner, an apparatus to form an image employing the toner, and a method of forming an image using the toner are provided. The toner includes a binder resin including a first type of binder resin having a first weight-average molecular weight and a second type of binder resin having a second weight-average molecular weight different than the first weight-average molecular weight, a colorant, and a releasing agent.Type: GrantFiled: February 17, 2012Date of Patent: November 26, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Kyeong Pang, Tae-hoe Koo, Su-bum Park, Ju-yeon Lee, Jun-young Lee
-
Patent number: 8592113Abstract: A toner including a mother toner comprising a binder resin and a calixarene having a halogen group, and a charge controlling agent having a halogen group that is present on a surface of the mother toner. The ratio of halogen ion to carbon ion on a surface of the toner is from 0.01 to 0.5, when determined by TOF-SIMS. The toner can be prepared by preparing a first liquid by dissolving or dispersing toner components including a calixarene having a halogen group and a binder resin and/or a precursor of the binder resin in an organic solvent; preparing a second liquid by emulsifying or dispersing the first liquid in an aqueous medium; removing the organic solvent from the second liquid; preparing a third liquid by washing the second liquid from which the organic solvent is removed; and adding a charge controlling agent having a halogen group to the third liquid.Type: GrantFiled: October 6, 2010Date of Patent: November 26, 2013Assignee: Ricoh Company, LimitedInventors: Masaki Watanabe, Hiroshi Yamashita, Tomoh Kubo
-
Patent number: 8592118Abstract: In accordance with some embodiments, a toner including a first binder resin, a release agent, a release agent dispersing resin, and a colorant is provided. The first binder resin includes an amorphous polyester resin (a) having a polyhydroxycarboxylic acid skeleton in its main chain. The polyhydroxycarboxylic acid skeleton comprises optically-active monomers having an optical purity X of 80% by mole or less. The optical purity X is represented by the following formula: X(% by mole)=|X(L-form)?X(D-form)| wherein X(L-form) and X(D-form) represent ratios (% by mole) of L-form and D-form optically-active monomers, respectively. The release agent includes an ester of a fatty acid having an average carbon number of 18 to 24 with glycerin or a polyglycerin having an average polymerization degree of 2 to 10. The ester has a melting point of 55 to 80° C.Type: GrantFiled: April 26, 2012Date of Patent: November 26, 2013Assignee: Ricoh Company, Ltd.Inventors: Shingo Sakashita, Kazumi Suzuki, Tatsuya Morita
-
Patent number: 8580470Abstract: A modified charge control agent composition comprising a metal compound (A) of aromatic hydroxycarboxylic acid bonded with a metal atom selected from a zirconium atom, a calcium atom, an aluminum atom, a chromium atom, a boron atom, and a zinc atom via at least one of an ionic bond, a covalent bond, and a coordinate bond; and at least one inorganic pigment (B), wherein the pigment (B) is contained in an amount of from 1 to 20 parts by mass in 100 parts by mass of the composition. The modified charge control agent composition exhibits a high charge-imparting effect, and an electrostatic image developing toner that contains the charge control agent composition will have a high electrostatic charge amount and a high environmental stability.Type: GrantFiled: April 16, 2007Date of Patent: November 12, 2013Assignee: Hodogaya Chemical Co., Ltd.Inventors: Hideyuki Otsuka, Masaki Okubo, Osamu Mukudai
-
Publication number: 20130295341Abstract: A fluorescing dry toner particle comprises a polymeric binder phase comprising a non-fluorescing binder polymer and a polymeric fluorescing colorant dispersed within the non-fluorescing binder polymer. The polymeric fluorescing colorant comprises a fluorescing moiety that is covalently attached to a colorant polymer that is the same or different than the non-fluorescing binder polymer, but the polymeric fluorescing colorant is blendable with the non-fluorescing binder polymer to form a homogeneous polymeric binder matrix, and is present in an amount of at least 1 weight % and up to and including 40 weight %, based on the total fluorescing dry toner particle weight. These fluorescing dry toner particles can be used in various dry developers to provide fluorescing toner images with or without non-fluorescing color toner images.Type: ApplicationFiled: May 2, 2012Publication date: November 7, 2013Inventors: Dinesh Tyagi, Louise Granica
-
Publication number: 20130295500Abstract: A fluorescing dry toner particle comprises a polymeric binder phase comprising a non-fluorescing binder polymer and a polymeric fluorescing colorant dispersed within the non-fluorescing binder polymer. The polymeric fluorescing colorant comprises a fluorescing moiety that is covalently attached to a colorant polymer that is the same or different than the non-fluorescing binder polymer, but the polymeric fluorescing colorant is blendable with the non-fluorescing binder polymer to form a homogeneous polymeric binder matrix, and is present in an amount of at least 1 weight % and up to and including 40 weight %, based on the total fluorescing dry toner particle weight. These fluorescing dry toner particles can be used in various dry developers to provide fluorescing toner images with or without non-fluorescing color toner images.Type: ApplicationFiled: March 15, 2013Publication date: November 7, 2013Inventors: Dinesh Tyagi, Louise Granica
-
Patent number: 8574804Abstract: Toners are provided, which possess low melt properties capable of producing a low gloss finish. The toners include a core and a shell. The shell includes a crystalline resin. The core may include at least one amorphous resin, an optional crystalline resin, an optional wax, and an optional colorant.Type: GrantFiled: August 26, 2010Date of Patent: November 5, 2013Assignee: Xerox CorporationInventors: Allan K. Chen, Santiago Faucher, Edward Graham Zwartz, Kimberly D. Nosella, Daryl W. Vanbesien
-
Patent number: 8574801Abstract: A toner is provided which has toner particles containing an aromatic compound represented by the following formula (1), and a colorant: wherein R1 to R3 each independently represent a hydrogen atom, a hydroxyl group, a carboxyl group, an alkyl group having 1 to 18 carbon atom(s) or an alkoxyl group having 1 to 18 carbon atom(s); R4 to R8 each independently represent a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atom(s) or an alkoxyl group having 1 to 18 carbon atom(s); and m represents an integer of 1 to 3.Type: GrantFiled: April 27, 2012Date of Patent: November 5, 2013Assignee: Canon Kabushiki KaishaInventors: Hitoshi Itabashi, Takashi Kenmoku, Akane Masumoto
-
Patent number: 8574800Abstract: A toner for electrostatic charge image development includes toner particles and fatty acid metal salt particles. The content of the fatty acid metal salt particles is from 0.2 parts by weight to 5 parts by weight with respect to 100 parts by weight of the toner particles; the weight of fatty acid metal salt particles remaining on a sieve having an opening of 25 ?m when the toner is sieved with the sieve having an opening of 25 ?m is from 0.015% by weight to 0.300% by weight with respect to the total weight of the toner; and the weight of fatty acid metal salt particles remaining on a sieve having an opening of 45 ?m when the toner is sieved with the sieve having an opening of 45 ?m is 0.030% by weight or less with respect to the total weight of the toner.Type: GrantFiled: December 9, 2009Date of Patent: November 5, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Masahiro Okita, Yutaka Saito, Yasuaki Hashimoto
-
Publication number: 20130280649Abstract: 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: ApplicationFiled: April 17, 2013Publication date: October 24, 2013Inventors: Hiroshi NAGASAWA, Kouji SUGAMA, Hiroyuki KONNO, Takaki KAWAMURA
-
Patent number: 8563206Abstract: A negatively chargeable developer includes: negatively chargeable toner mother particles including at least binding resin and colorant; and an external additive that is externally added to a surface of the toner mother particles, wherein the external additive includes polymethyl methacrylate that is within a range from approximately 0.4 parts by weight to approximately 0.8 parts by weight inclusive per 100 parts by weight of the toner mother particles and that has positive chargeability.Type: GrantFiled: August 30, 2011Date of Patent: October 22, 2013Assignee: Oki Data CorporationInventor: Yuki Matsuura
-
Publication number: 20130273467Abstract: 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: ApplicationFiled: March 11, 2013Publication date: October 17, 2013Applicant: Kao CorporationInventors: Takeshi ASHIZAWA, Shogo Watanabe, Takashi Kubo, Norihiro Hirai
-
Patent number: 8557491Abstract: A toner according to the present invention contains at least a polyester resin as a binder resin, a colorant, a releasing agent, a fixing-assisting component, and a fatty acid, wherein the fixing-assisting component has a melting point of 60° C. to 120° C. and contains at least one of an esterified compound obtained by esterification of the fatty acid and an amide compound obtained by amidation of the fatty acid.Type: GrantFiled: July 27, 2009Date of Patent: October 15, 2013Assignee: Ricoh Company, Ltd.Inventors: Tsuyoshi Sugimoto, Naohito Shimota, Hiroshi Yamashita, Naohiro Watanabe, Shinichi Wakamatsu, Masaki Watanabe
-
Patent number: 8552141Abstract: A hyper-branched polyester and a method of making the same having a tri-functional monomer A3, a di-functional monomer B2 and a mono-functional monomer C1 having a monomer ratio of A3:B2:C1 from about 1:0.2:2 to about 1:1.4:0.2 for use in a chemically processed electrophotographic toner providing a lower fusing temperature. In one form, the hyper-branched polyester includes a tri-hydroxy monomer, a di-acid and its derivatives, and a mono-acid and its derivatives. In other forms, a substituted anhydride and a long chain hydrocarbon carboxylic acid and its derivatives may also be included in the di-functional monomer.Type: GrantFiled: December 3, 2009Date of Patent: October 8, 2013Assignee: Lexmark International, Inc.Inventors: Charles Edward Akers, Jr., Michael James Bensing, John Joseph Kraseski, Claudia Alexandra Marin, Jing X. Sun
-
Publication number: 20130260304Abstract: There is provided a toner, including toner mother particles which contain a binder resin, a colorant, and a wax, wherein a difference between a density of the wax in a solid state and a density of the wax in a liquid state is not less than 0.11 g/cm3; the density of the wax in the liquid state is not more than 0.835 g/cm3; and a heat quantity of the wax per unit mass which is obtained from an endothermic peak area at a low temperature side measured by a differential scanning calorimetry is not less than 190 mJ/mg.Type: ApplicationFiled: March 15, 2013Publication date: October 3, 2013Applicant: Brother Kogyo Kabushiki KaishaInventors: Kumiko Suzuki, Jun Ikami
-
Publication number: 20130260300Abstract: In accordance with the embodiment, a developer includes a toner, wherein the toner includes a binder resin, a coloring material, a crystalline polyester resin having a peak DSC melting point of higher than 90 degree Celsius but lower than 110 degree Celsius, a toner core particle including an ester wax having a liner alky having 15-48 carbons, containing an ester compound of the carbon number of which represents the maximum strength in mass spectrometer content of more than 20 weight percent but smaller than 45 percent of the total weight of all of the ester wax and containing a silica particle having a volume average particle size of smaller than 85 nm combined by a sol-gel method, wherein the toner with the silica particle content of 0.2-2.0 weight percent.Type: ApplicationFiled: March 28, 2013Publication date: October 3, 2013Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBAInventor: Satoshi Araki
-
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
-
Patent number: 8541153Abstract: A toner for developing an electrostatic image contains at least one of an oxidation polymerizable monomer and a polymer having an ethylenically unsaturated group, and an oxidation polymerization catalyst in a form of a composite with inorganic particles, wherein a temperature T(10 Mpa) and a temperature T(1 Mpa) satisfies the following expression (1): 20° C.?T(1 MPa)?T(10 MPa)??(1) wherein, the temperature T(10 Mpa) is a temperature at which a viscosity of the toner under a pressure of 10 Mpa applied with a flow tester becomes 104 Pa·s, and the temperature T(1 Mpa) is a temperature at which a viscosity of the toner under a pressure of 1 Mpa applied with a flow tester becomes 104 Pa·s.Type: GrantFiled: August 30, 2010Date of Patent: September 24, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Yasuo Matsumura, Hirotaka Matsuoka, Hideo Maehata, Yuki Sasaki, Fumiaki Mera
-
Publication number: 20130244154Abstract: Toner containing a binder resin that contains at least one kind of resin having a crystalline polyester unit as its main component and a releasing agent containing a straight-chain mono ester having 48 or more carbon atoms accounting for 40% by weight or more of the releasing agent.Type: ApplicationFiled: March 4, 2013Publication date: September 19, 2013Inventors: Atsushi YAMAMOTO, Shinya NAKAYAMA, Hideyuki SANTO, Suzuka AMEMORI, Shingo SAKASHITA, Masahide YAMADA
-
Publication number: 20130236825Abstract: 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: ApplicationFiled: March 9, 2012Publication date: September 12, 2013Applicant: XEROX CORPORATIONInventors: Maura A. SWEENEY, Robert D. BAYLEY, Grazyna E. KMIECIK-LAWRYNOWICZ, Anne Marie SWEENEY-JONES
-
Publication number: 20130224642Abstract: A toner to develop an electrostatic charge image, a toner supply device employing the toner, an apparatus to form an image employing the toner, and a method of forming an image using the toner are provided. The toner includes at least a binder resin, a colorant, and a releasing agent. By using the binder resin including a combination of a reduced molar weight binder resin, an increased molar weight binder resin, and the releasing agent having an effecdtive compatibility with the binder resin together, the toner has accurately-controlled dynamic viscoelastic properties represented by a loss tangent. The toner to develop an electrostatic charge image according to an embodiment has development stability, development lifetime, fixability, charging stability, gloss, an anti-offset property, and heat storage ability at predetermined levels or higher.Type: ApplicationFiled: February 27, 2013Publication date: August 29, 2013Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: Samsung Electronics Co., Ltd.
-
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
-
Patent number: 8518622Abstract: A toner containing a binder resin, a colorant, and a releasing agent, wherein the colorant contains a mixed crystal of a C. I. PIGMENT YELLOW 185 and a C. I. PIGMENT YELLOW 139, and wherein a mass ratio of the C. I. PIGMENT YELLOW 185 to the C. I. PIGMENT YELLOW 139 (mass of the C. I. PIGMENT YELLOW 185/mass of the C. I. PIGMENT YELLOW 139) in the toner is 95/5 to 50/50.Type: GrantFiled: June 14, 2011Date of Patent: August 27, 2013Assignee: Ricoh Company, Ltd.Inventors: Satoshi Ogawa, Daisuke Inoue, Daisuke Ito, Osamu Uchinokura, Junichi Awamura, Teruki Kusahara, Satoshi Kojima, Mamoru Hozumi, Shoko Sato
-
Publication number: 20130216944Abstract: A toner contains a binder resin, a colorant, and a releasing agent, wherein the toner contains toner particles, and wherein a proportion of the toner particles containing one or more voids having diameters D1 of larger than 0.0 ?m but 0.5 ?m or smaller is more than 5.0% to 60%, and a proportion of the toner particles containing one or more voids having diameters D2 of 1.0 ?m or larger is 10% or less.Type: ApplicationFiled: October 18, 2011Publication date: August 22, 2013Inventors: Masana Shiba, Ryuta Chiba, Tsuneyasu Nagatomo
-
Publication number: 20130209930Abstract: Disclosed is a toner for electrostatic image development, having excellent low-temperature fixability and also having hot offset resistance and post-fixing separability. The toner for electrostatic image development includes toner particles containing a releasing agent and a binder resin, and the binder resin contains a copolymer including a structural unit derived from a monomer represented by the general formula (1). In the general formula (1), R1 represents a hydrogen atom or a methyl group, and R2 represents a hydrogen atom, an alkyl group having 1 to 16 carbon atoms, or an aryl group having 6 to 15 carbon atoms. m is an integer of 2 or 3, and n is an integer of 1 to 8.Type: ApplicationFiled: February 12, 2013Publication date: August 15, 2013Applicant: Konica Minolta Business Technologies IncInventors: Takaki KAWAMURA, Kouji SUGAMA, Hiroyuki KONNO, Hiroshi NAGASAWA
-
Patent number: 8501379Abstract: A toner containing base particles produced by dissolving and/or dispersing a toner material in an organic solvent so as to prepare a toner material solution, and emulsifying and/or dispersing the toner material solution in an aqueous medium, wherein the toner material contains a binder resin and a releasing agent, the binder resin contains a polyester resin, and the releasing agent is a hydrocarbon wax which is modified with a carboxylic acid or carboxylic anhydride.Type: GrantFiled: June 9, 2008Date of Patent: August 6, 2013Assignee: Ricoh Company, Ltd.Inventors: Tsuyoshi Sugimoto, Hiroshi Yamashita
-
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
-
Publication number: 20130196261Abstract: To provide a toner, which contains: toner base particles each containing a binder resin and a colorant; and an external additive containing inorganic particles and fatty acid metal salt particles, wherein the inorganic particles contain at least hydrophobic silica particles, wherein a liberation ratio Ya of the hydrophobic silica particles from the toner is 1% by mass to 20% by mass, and wherein a libration ratio Yb of the fatty acid metal salt particles from the toner is 30% by mass to 90% by mass.Type: ApplicationFiled: January 17, 2013Publication date: August 1, 2013Inventors: Osamu UCHINOKURA, Tomoyuki Satoh, Takahiro Honda, Daisuke Inoue, Mamoru Hozumi
-
Publication number: 20130196260Abstract: A toner including: a binder resin containing a non-crystalline resin and a crystalline resin; a colorant; and, a releasing agent, wherein the releasing agent has a melting point of 55° C. to 80° C., and wherein the toner satisfies the following Expressions 1 and 2: (Expression 1): 20,000 Pa·s?G1?50,000 Pa·s; and (Expression 2): (G4/G2)/(G3/G1) 1.00, where G1 is a storage modulus, G2 is a loss modulus, G3 is a storage modulus and G4 is a loss modulus, and the storage modulus G1 and the loss modulus G2 are measured at 80° C. when the toner is heated from 70° C. to 150° C. and the storage modulus G3 and the loss modulus G4 are measured at 80° C. when the toner heated to 150° C. is cooled to 70° C.Type: ApplicationFiled: December 28, 2012Publication date: August 1, 2013Inventors: Ryuuta YOSHIDA, Takahiro HONDA, Junichi AWAMURA, Osamu UCHINOKURA, Masaki WATANABE, Daisuke INOUE, Tomoki MURAYAMA, Mamoru HOZUMI
-
Publication number: 20130189612Abstract: The present invention relates to a two-component developer which comprises a toner, and a carrier having a surface of a core material particle coated with a resin having a unit of general formula (1). The present invention provides a two-component developer which has enhanced environmental stability of carrier charging performance.Type: ApplicationFiled: December 27, 2012Publication date: July 25, 2013Applicant: Konica Minolta Business Technologies, Inc.Inventors: Hitomi MOTANI, Tomoko MINE, Tomomi OSHIBA
-
Patent number: 8492061Abstract: The disclosure provides electrophotographic toner and a method of preparing the same. The toner includes a latex, a colorant, and a releasing agent, wherein the toner has a weight-average molecular weight of about 50,000 to about 80,000; a complex viscosity of about 1×103 to about 5×104 (Pa·s) at a temperature ranging from about 100° C. to about 140° C.; and a storage modulus Pa (dG?) to a loss modulus Pa (dG?) (dG?/dG?) ratio of about 1.10 to about 1.25.Type: GrantFiled: November 4, 2009Date of Patent: July 23, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-Hyeuk Jeong, Kyeong Pang, Jung-Ik Choi, Soon-Cheol Jeong, Hong-Chul Shin
-
Patent number: 8486596Abstract: A toner produced by a method including dissolving or dispersing toner components comprising a colorant and at least one of a binder resin and a precursor thereof in an organic solvent to prepare a toner components liquid, dispersing the toner components liquid in an aqueous medium including a surfactant, a particulate resin A having the same polarity as the surfactant and a volume average particle diameter of from 5 to 50 nm, and a particulate resin B having a volume average particle diameter of from 10 to 500 nm to form liquid droplets, and removing the organic solvent from the liquid droplets. The particulate resin B is incompatible with the binder resin and swells in the organic solvent.Type: GrantFiled: June 26, 2009Date of Patent: July 16, 2013Assignee: Ricoh Company, LimitedInventors: Masaki Watanabe, Hiroshi Yamashita, Tsuyoshi Sugimoto, Naohiro Watanabe, Shinichi Wakamatsu
-
Patent number: 8486599Abstract: According to an embodiment, provided is a developer, which is used for a full-color image forming apparatus, wherein the developer includes a monochrome toner and a color toner, each including a coloring material, an amorphous polyester resin, a crystalline polyester resin, and an ester wax which includes ester compounds having an alkyl group and also having a carbon number of from 32 to 48, the amorphous polyester resin to be blended in the monochrome toner has a melting point (Tm2) of from 140 to 155° C. and the amorphous polyester resin to be blended in the color toner has a melting point (Tm1) of from 115 to 130° C., and the Tm1 and the Tm2 satisfy the following formula (1): 10(° C.)?Tm2?Tm1?40(° C.).Type: GrantFiled: September 6, 2012Date of Patent: July 16, 2013Assignee: Toshiba Tec Kabushiki KaishaInventor: Koichi Kuroyama