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46results about How to "Hot offset resistance" patented technology
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Toner, developer, and image forming apparatus
ActiveUS20070141498A1Good low temperatureHot offset resistanceDevelopersPolyesterCompound (substance)
A toner is provided including a binder resin; a release agent; a colorant; and a fatty acid amide compound, wherein the binder resin includes: an amorphous polyester (A) having a softening point of from 70 to 140° C.; an amorphous polyester (B) having a softening point of from 120 to 190° C.; and a crystalline polyester (C), and wherein the following relationship is satisfied: TmC<Tm(Asp), wherein TmC represents a softening point of the crystalline polyester (C) and Tm (Asp) represents a softening point of the fatty acid amide compound; and a developer and an image forming apparatus using the toner.
Owner:RICOH KK
Toner and developer
ActiveUS20130059247A1Excellent low temperature fixabilityHot offset resistanceDevelopersVitrificationPolyester resin
To provide a toner, which contains: a non-crystalline polyester resin A obtained through a reaction between a non-linear chain reactive precursor and a curing agent, and having a glass transition temperature of −60° C. to 0° C.; a non-crystalline polyester resin B having a glass transition temperature of 40° C. to 70° C.; and a crystalline polyester resin C, wherein the toner has a glass transition temperature Tg1st of 20° C. to 40° C. as measured with first heating in differential scanning calorimetry (DSC).
Owner:RICOH KK
Toner and developer
InactiveUS20110223532A1Good combination of low-temperature fixabilityImprove bindingDevelopersPolyester resinDifferential scanning calorimetry
A toner, comprising a colorant, a crystalline polyester resin, and an amorphous polyester resin, in which the crystalline polyester resin satisfies the following relations:60≦(T2-cp)<80(T2-cs2)−(T2-cp)<10(T2-cp)−(T2-cs1)<10wherein (T2-cp) (° C.) represents an endothermic peak temperature, (T2-cs1) (° C.) represents a first endothermic shoulder temperature, and (T2-cs2) (° C.) represents a second endothermic shoulder temperature, each determined from a second heating in a differential scanning calorimetry.
Owner:RICOH KK
Toner and two-component developer
Provided is a toner obtained by melting and kneading a binder resin containing a polyester resin A and a polyester resin B, a colorant, and a wax, in which in the resin A, the content of a polyhydric alcohol unit derived from an aromatic diol, the content of a polyhydric alcohol unit derived from an oxyalkylene ether of a novolac type phenol resin, and the content of a polyvalent carboxylic acid unit derived from an aliphatic dicarboxylic acid, which contains a straight-chain hydrocarbon having 4 or more to 16 or less carbon atoms as a main chain and has carboxyl groups at both of its terminals, fall within specific ranges, and in the resin B, the content of a polyhydric alcohol unit derived from an aromatic diol and the content of a polyvalent carboxylic acid unit derived from an aromatic dicarboxylic acid or a derivative thereof fall within specific ranges.
Owner:CANON KK
Toner
InactiveUS20130288173A1Excellent low temperature fixabilityHigh glossDevelopersWaxInorganic particles
Provided is a toner that has excellent low-temperature fixability, hot offset resistance, high image glossiness and fixing wraparound resistance, as well as high durable stability. The toner includes toner particles that contain a binder resin, a colorant and a wax, and fine inorganic particles on a surface of the toner particles, wherein the binder resin contains a polyester resin A and a styrene resin B, and a content ratio A / B of the polyester resin A and the styrene resin B is 85 / 15 or more and 98 / 2 or less based on mass, the styrene resin B has a weight average molecular weight Mw of a tetrahydrofuran soluble component of 2,000 or more and 5,000 or less, and the toner has been subjected to a hot-air surface treatment.
Owner:CANON KK
Toner and developer
ActiveUS20120189951A1Excellent low temperature fixabilityHot offset resistance and heat resistance storage stabilityDevelopersPolymer sciencePolyester resin
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.
Owner:RICOH KK
Toner binder and resin particle
Provided is a toner binder that is excellent in heat resistant storage properties and hot offset resistance properties and also affords excellent anti-blocking properties of paper when printing continuously. The present invention is directed to a toner binder comprising a crystalline resin (A), wherein the crystalline resin (A) comprises two or more crystalline resins (a) and the endothermic peak temperature group that is composed of all of the endothermic peak temperatures of the respective two or more crystalline resins (a) has two or more different endothermic peak temperatures; and a resin particle containing the toner binder.
Owner:SANYO CHEM IND LTD
Electrostatic image developing toner, developer, image forming apparatus, image forming method, and process cartridge
ActiveUS20100330489A1Excellent low temperature fixabilityMaintaining hot offset resistanceDevelopersElectrographic processes using charge patternAlcoholImage formation
An electrostatic image developing toner including a toner particle (C), wherein the toner particle (C) has a structure in which a resin particle (A) containing at least a first resin (a) or a coated film (P) containing the first resin (a) is attached to a surface of a resin-containing particle (B) containing a second resin (b), and wherein the resin (b) includes a polyhydroxycarboxylic acid skeleton, and the resin (a) is a polyester resin containing a polybasic acid and a polyhydric alcohol.
Owner:RICOH KK
Toner, developer including the toner, and developing device and image forming apparatus using the toner
InactiveUS20050208403A1Easy to optimizeLow temperature fixabilityDevelopersElectrographic processes using charge patternParticulatesImage formation
A toner including toner particles including a binder resin containing at least one polyester resin comprising an inorganic tin (II) compound and an external additive including a particulate inorganic material having a volume average particle diameter greater than 70 nm and less than 300 nm. The binder resin preferably includes a polyester resin having a weight average molecular weight of from 5,000 to 50,000 and another resin having a weight average molecular weight of from 200,000 to 400,000. A developer including the toner; and a developing device, an image forming apparatus and a process cartridge, which form toner images using the toner are also provided.
Owner:RICOH KK
Toner, developer, toner container, process cartridge, image forming method, and image forming apparatus
InactiveUS20090214973A1Not to contaminateReduce energy consumptionElectrographic process apparatusDevelopersAlcoholPolyester resin
A toner is provided that includes a release agent, a colorant, a binder resin including a polyester resin, and a fixing auxiliary component including an ester compound of a fatty acid with an alcohol. The fatty acid includes stearic acid and behenic acid in a total amount of 80% by weight or more. The alcohol includes ethylene glycol in an amount of 80% by weight or more. The ester compound has a hydroxyl value of 10 to 100 mgKOH / g.
Owner:RICOH KK
Toner, method for manufacturing the toner, and process cartridge using the toner
InactiveUS20090017391A1Good combination of low-temperature fixabilityHot offset resistanceElectrographic process apparatusDevelopersUreaChemistry
A toner including a colorant, a polyester (I), and an urea-modified polyester is provided. The urea-modified polyester is a reaction product of an isocyanate-modified polyester with an amine. The isocyanate-modified polyester is obtained by modifying a polyester (II) with an isocyanate. The polyester (II) has specific number average molecular weight (Mn) and hydroxyl value [OHV]. The toner can be manufactured by dispersing or emulsifying a toner constituent liquid including the colorant, the polyester (I), and the isocyanate-modified polyester, in an aqueous medium. The toner can be used for a one-component developing device.
Owner:RICOH KK
Toner
InactiveUS20160109820A1Excellent low temperature fixabilityHigh glossDevelopersWaxInorganic particle
Provided is a toner that has excellent low-temperature fixability, hot offset resistance, high image glossiness and fixing wraparound resistance, as well as high durable stability. The toner includes toner particles that contain a binder resin, a colorant and a wax, and fine inorganic particles on a surface of the toner particles, wherein the binder resin contains a polyester resin A and a styrene resin B, and a content ratio A / B of the polyester resin A and the styrene resin B is 85 / 15 or more and 98 / 2 or less based on mass, the styrene resin B has a weight average molecular weight Mw of a tetrahydrofuran soluble component of 2,000 or more and 5,000 or less, and the toner has been subjected to a hot-air surface treatment.
Owner:CANON KK
Toner, developer, and image forming apparatus
ActiveUS20140342283A1Less pollutionImprove image qualityDevelopersElectrographic process apparatusImaging equipmentCrystallization
To provide a toner for developing an electrostatic image, the toner including toner particles, wherein the toner particles contain: a non-crystalline resin A; and a crystalline resin, wherein the crystalline resin contains a crystalline resin C containing a urethane bond, or a urea bond, or both thereof, and wherein the toner particles each have a sea-island structure, where the resin C is dispersed in the non-crystalline resin on a cross-section of the toner particle.
Owner:RICOH KK
Toner, developer, process cartridge, and image forming apparatus
ActiveUS20130244157A1Excellent hot offset resistanceImprove low-temperature fixabilityElectrographic process apparatusDevelopersVolume averageImaging equipment
A toner, including: a binder resin; releasing agent-encapsulating capsules; and a colorant, wherein the releasing agent-encapsulating capsules each include: a capsule formed of a resin (I) which is different from the binder resin; and a releasing agent (RA) which is encapsulated in the capsule, and the releasing agent-encapsulating capsules exist in the binder resin, and wherein 50% to 100% of the releasing agent-encapsulating capsules exist in a region from a surface of the toner to a depth of 0.10 times a volume-average particle diameter of the toner.
Owner:RICOH KK
Dry toner
InactiveUS7303847B2Small particle sizeHigh temperature resistanceDevelopersElectrographic processes using charge patternPolyesterOrganic solvent
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 μm and a ratio of the volume average particle diameter (Dv) to a number average particle diameter (Dp) is from 1.00 to 1.25.
Owner:RICOH KK
Toner, developer, and image forming apparatus
A toner is provided including a binder resin; a release agent; a colorant; and a fatty acid amide compound, wherein the binder resin includes: an amorphous polyester (A) having a softening point of from 70 to 140° C.; an amorphous polyester (B) having a softening point of from 120 to 190° C.; and a crystalline polyester (C), and wherein the following relationship is satisfied: TmC<Tm(Asp), wherein TmC represents a softening point of the crystalline polyester (C) and Tm (Asp) represents a softening point of the fatty acid amide compound; and a developer and an image forming apparatus using the toner.
Owner:RICOH KK
Toner and method of manufacturing toner
ActiveUS20120237869A1Good combination of low-temperature fixabilityHot offset resistanceDevelopersChemistryColoring agents
A toner including a colorant and a binder resin is provided. The binder resin includes a polyester resin having a glass transition temperature of 18 to 40° C., a weight average molecular weight of 10,000 to 100,000, and a flow beginning temperature of 70 to 120° C. The toner has a volume average particle diameter of 3 to 10 μm.
Owner:RICOH KK
Toner for developing electrostatic images
ActiveUS9170509B2Excellent heat-resistant shelf stabilityLow-temperature fixabilityDevelopersVitrificationGlass transition
Disclosed is a toner for developing electrostatic images comprising a colored resin particle containing a binder resin, a colorant and a softening agent, and an external additive, wherein the colored resin particle contains a diester compound represented by the following general formula (1) as the softening agent, and a content of the diester compound is in the range from 1 to 15 parts by mass with respect to 100 parts by mass of the colored resin particle, and the toner has a softening temperature “Ts” of 55 to 70° C., a flow starting temperature “Tfb” of 80 to 100° C. and a glass transition temperature of 40 to 70° C. in a flow tester:wherein, R1 is an ethylene group or a trimethylene group; and each of R2 and R3 is independently a linear alkyl group having 11 to 25 carbons.
Owner:NOF CORP
Toner
ActiveUS20200124999A1Excellent in stick resistanceHot offsetDevelopersElastic modulusPolymer chemistry
A toner has a toner particle that has a binder resin and a release agent, wherein when the temperature when G′=1.0×105 Pa in a dynamic viscoelastic measurement on the toner is denoted by Ta, and the glass transition temperature in a differential scanning calorimetric measurement on the toner is denoted by Tg, the Ta and the Tg satisfy the following formulas:40° C.≤Tg≤70° C.,60° C.≤Ta≤90° C., and0° C.≤Ta−Tg≤35° C.; andthe toner has a storage elastic modulus G′ having a minimum value in the range from 110° C. to 150° C. in a dynamic viscoelastic measurement on the toner.
Owner:CANON KK
Toner for developing electrostatic images and developer
InactiveUS20130171557A1Stable low temperature fix ability and hot offset resistanceStable resistanceDevelopersWaxChemistry
To provide a toner containing: a binder resin containing a non-crystalline polyester resin and a crystalline polyester resin; a colorant; and wax, wherein the toner satisfies the following formula 1, and has loss tangent of 1 or smaller at 80° C. or higher, B−A<20 Formula 1 where A represents a melting point of the crystalline polyester resin and B represents a temperature at which the toner has storage modulus G′ of 20,000 Pa.
Owner:RICOH KK
Resin for toner binder and toner composition
InactiveUS7049041B2Good low temperature fixabilityPreventing Image Quality DeteriorationDevelopersDiketoneDibutyltin oxide
The present invention provides a toner binder for developing electrostatic charge images,which binder comprises a polycondensate polyester resin,said polyester resin being a product formed in the presence of at least one titanium-containing catalyst (A) selected from the group consisting of a titanium halides (A1), a titanium diketone enolate (A2), a titanium carboxylate (A3), a titanyl carboxylate (A4), and a titanyl carboxylate salt (A5).Furthermore, the present invention provides a toner binder for developing electrostatic charge images,which binder comprises a polycondensate polyester resin,said polyester resin being a product formed in the presence of at least one tin-containing catalyst (B) selected from the group consisting of dioctyltin oxide (B1), monobutyltin oxide (B2), and dibutyltin oxide (B3), with the content of tributyltin compounds in (B3) being not more than 250 ppm.
Owner:SANYO CHEM IND LTD
Toner, developer including the toner, and developing device and image forming apparatus using the toner
ActiveUS20110268474A1Easy to optimizeLow temperature fixabilityMaterial nanotechnologyDevelopersParticulatesVolume average
A toner including toner particles including a binder resin containing at least one polyester resin comprising an inorganic tin (II) compound and an external additive including a particulate inorganic material having a volume average particle diameter greater than 70 nm and less than 300 nm. The binder resin preferably includes a polyester resin having a weight average molecular weight of from 5,000 to 50,000 and another resin having a weight average molecular weight of from 200,000 to 400,000. A developer including the toner; and a developing device, an image forming apparatus and a process cartridge, which form toner images using the toner are also provided.
Owner:LQ PROD & DEVICES
Toner
A toner having a toner particle including a binder resin and a wax, wherein the wax includes a specific diester compound; a proportion As of an area occupied by the wax in a region from a surface of the toner particle to 0.5 μm is 15.0% or less; wax domains are observed in the cross section of the toner particle, and an average number of the domains per cross section of one toner particle is from 10 to 2000; when a mass concentration of a polyvalent metal element in the toner particle determined by fluorescent X-ray analysis is denoted by Mi (ppm), Mi is from 3.5 ppm to 1100 ppm; and when a mass concentration of a polyvalent metal element in the toner particle determined by X-ray photoelectron spectroscopy is denoted by Ms (ppm),Mi>Ms.
Owner:CANON KK
Toner for developing electrostatic images and method for producing the same
ActiveUS20120135344A1Excellent heat-resistant shelf stabilityImprove low-temperature fixabilityDevelopersVitrificationMeth-
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.
Owner:ZEON CORP
Toner and developer
ActiveUS8932789B2Excellent low temperature fixabilityHot offset resistanceDevelopersPolyester resinGlass transition
Owner:RICOH KK
Toner for developing electrostatic images and method for producing the same
ActiveUS8652724B2Increased shelf stabilityHot offset resistanceDevelopersEngineeringGlass transition
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.
Owner:ZEON CORP
Toner, image forming apparatus, and process cartridge
ActiveUS20160195826A1Slow changeExcellent low temperature fixabilityDevelopersAqueous solutionMethanol
A toner including a binder resin and a release agent, wherein the toner has a component soluble in a 50% by mass aqueous methanol solution in an amount of 0.10% by mass to 0.60% by mass, and wherein the toner has a flowing-out beginning temperature (Tfb) of 55.0° C. to 100.0° C. as determined by a flowtester method.
Owner:RICOH KK
Toner
Owner:CANON KK
Toner, toner accommodating unit, and image forming apparatus
A toner, including: a polyester resin, wherein the polyester resin has a structure represented by any one of formulas 1) to 3) below: 1) R1-(NHCONH-R2)n-, 2) R1-(NHCOO-R2)n-, and 3) R1-(OCONH-R2)n-, where n is 3 or more, R1 represents an aromatic organic group or an aliphatic organic group, and R2 represents a group derived from a resin that is polyester formed of polycarboxylic acid, polyol, or both thereof; or that is a modified polyester obtained by modifying polyester with isocyanate.
Owner:RICOH KK
Toner and two-component developer
Provided is a toner obtained by melting and kneading a binder resin containing a polyester resin A and a polyester resin B, a colorant, and a wax, in which in the resin A, the content of a polyhydric alcohol unit derived from an aromatic diol, the content of a polyhydric alcohol unit derived from an oxyalkylene ether of a novolac type phenol resin, and the content of a polyvalent carboxylic acid unit derived from an aliphatic dicarboxylic acid, which contains a straight-chain hydrocarbon having 4 or more to 16 or less carbon atoms as a main chain and has carboxyl groups at both of its terminals, fall within specific ranges, and in the resin B, the content of a polyhydric alcohol unit derived from an aromatic diol and the content of a polyvalent carboxylic acid unit derived from an aromatic dicarboxylic acid or a derivative thereof fall within specific ranges.
Owner:CANON KK
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