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410results about How to "Excellent low temperature fixability" patented technology
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Toner and developer for electrostatic development, production thereof, image forming process and apparatus using the same
ActiveUS20050042534A1Excellent low temperature fixabilitySatisfactory low-temperature image-fixing propertyDevelopersPolymer scienceOrganic solvent
A toner is prepared by dissolving and / or dispersing a modified polyester resin in an organic solvent to yield a solution or dispersion, the modified polyester resin being reactive with a compound having an active hydrogen group, mixing the solution or dispersion with an aqueous medium containing resin particles, and subjecting the modified polyester resin to crosslinking and / or elongation in the aqueous medium. The binder resin further includes a crystalline polyester resin in addition to the modified polyester resin.
Owner:RICOH KK
Toner and method for producing the same, and image-forming method using the same
ActiveUS20060068312A1Quality improvementHigh image densityDevelopersElectrographic processes using charge patternPolyesterImage formation
There are provided: a method for producing a toner containing to granulate a toner and to subjecting the granulated toner to at least washing with an alkali washing solution, in which the total organic carbon amount extractable from the alkali-washed toner is 200 ppm / g or less; a toner comprising polyester in which the total organic carbon amount extractable from the toner is 200 ppm / g or less, under the condition that the toner is subjected to washing with the alkali washing solution before extracting; and an image-forming method using such a toner.
Owner:RICOH KK
Toner and image forming method
ActiveUS20130157193A1Good storage stabilityExcellent low temperature fixabilityDevelopersElectrographic processes using charge patternPolyester resinPolymer chemistry
A toner containing colorant, releasing agent, and binder resin containing crystalline polyester resin, and non-crystalline polyester resin containing urethane bond, urea bond, or both, the non-crystalline polyester resin containing first and second non-crystalline polyester resins, both containing urethane bond, or urea bond, or both, wherein monomers constituting the first non-crystalline polyester resin contains isocyanate monomer for forming the urethane bond, the urea bond, or the both, in an amount of 0.5 mol % or greater to total amount of the monomers, monomers constituting the second non-crystalline polyester resin contain isocyanate monomer for forming the urethane bond, the urea bond, or the both, in an amount of 0.5 mol % or greater to total amount of the monomers, the first non-crystalline polyester resin has Tg of −60° C. or higher but lower than 10° C., and the second non-crystalline polyester resin has Tg of 30° C. or higher but lower than 70° C.
Owner:RICOH KK
Toner and full-color image forming method
InactiveUS6586147B2High transparencyExcellent low temperature fixabilityDevelopersElectrographic processes using charge patternWaxImage formation
A toner, particularly a color toner suitable for full-color image formation through a substantially oil-less heat-pressure fixing device, is formed from at least a binder resin, a colorant and a wax. The toner has viscoelasticity including: a storage modulus at 80° C. (G'80) in a range of 1x106-1x1010 dN / m2, storage moduli at temperatures of 120-180° C. (G'120-180) in a range of 5x103-1x106 dN / m2, and loss tangents (tan delta=G'' / G' as a ratio between G'' (loss modulus) and G' (storage molecules)) including a loss tangent at 180° C. (tan delta180) and a minimum of loss tangents over a temperature range of 120-180 ° C. (tan deltamin) satisfying 1<=tan delta180 / tan deltamin. The toner further exhibits a thermal behavior providing a heat-absorption curve according to differential scanning calorimetry (DSC) showing a maximum heat-absorption peak temperature in a range of 50-110° C. in a temperature range of 30-200° C.
Owner:CANON KK
Toner
A toner, particularly a color toner suitable for full-color image formation through a substantially oil-less heat-pressure fixing device, is formed from at least a binder resin, a colorant and a wax. The binder resin comprises a polyester-based resin selected from the group consisting of (a) a polyester resin, (b) a hybrid resin having a polyester unit and a vinyl polymer unit, and (c) a mixture of these resins. The wax is characterized by including a structural unit including an OH group, an amide, or an ester group at a specific position.
Owner:CANON KK
Toner and heat-fixing method
InactiveUS6808852B2Excellent low temperature fixabilityHigh quality imagingDevelopersElectrographic processes using charge patternMethacrylatePolyester
A toner characterized by improved fixing performances with no or minimum oil application is formed of: (i) a binder resin, (ii) a colorant, (iii) a hydrocarbon wax, (iv) a resin composition formed by copolymerization of a styrenic monomer together with at least one of nitrogen-containing vinyl monomers, carboxyl group-containing monomers, hydroxyl group-containing monomers and (meth)acrylate ester monomers, in the presence of a hydrocarbon unit; and (v) an organometallic compound. The binder resin (i) comprises a polyester component in a proportion of at least 60 wt. % of the binder resin. The toner has a GPC molecular weight distribution including a weight-average molecular weight (Mw) of at least 4.0x10<4 >an a ratio Mw / Mn of at least 50 between the Mw and a number-average molecular weight (Mn).
Owner:CANON KK
Toner
ActiveUS9034549B2Satisfactory heat-resistant storabilityExcellent low temperature fixabilityDevelopersWaxPolyester resin
Owner:CANON KK
Toner
ActiveUS8778585B2Excellent low temperature fixabilityReduce pollutionDevelopersPolymer scienceImaging quality
Owner:CANON KK
Yellow toner for developing electrostatic images
InactiveUS6022659AExcellent low temperature fixabilityImprove featuresDevelopersVitrificationAcid value
A yellow toner for developing electrostatic images is formed of yellow toner particles containing a binder resin and a yellow colorant. The yellow toner has a storage modulus G'180 at 180 DEG C. and a minimum storage modulus G'min(120-170) in a temperature range of 120-170 DEG C. giving a ratio [G'180 / G'min(120-170)] of 2.0-8.0. The binder resin comprises a polyester resin having a glass transition temperature of 50-65 DEG C. and an acid value of 2.0-25.0 mgKOH / g. The yellow toner is a compound represented by Formula (1) below: Formula (1): The primary particles of the yellow colorant exhibit a length / breadth ratio of at most 1.5. The yellow colorant is dispersed in the toner particles as independent particles (including primary particles and secondary particles) providing a number-average particle size of 0.1-0.7 mu m. The yellow toner is provided with improved fixability and anti-offset property as well as good color toner performances.
Owner:CANON KK
Toner, method of producing the toner, developer including the toner, and image forming method and apparatus using the developer
ActiveUS7056635B2Good dispersibilityImproved pulverizabilityDevelopersElectrographic processes using charge patternWaxCrystallography
A toner including a thermoplastic resin; a colorant; a wax; and a crystalline polymer, wherein a DSC endothermic peak temperature of the wax or the crystalline polymer determined by subjecting the toner to a differential scanning calorimetric analysis is lower by not less than 2° C. than a DSC endothermic peak temperature thereof determined when only the wax or the crystalline polymer is subjected to the differential calorimetric analysis.
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
ActiveUS20070218380A1Easy to chargeStable charging propertyDevelopersPhysical chemistryAqueous medium
A toner containing a colorant, a binder resin and a laminar inorganic mineral in which part or all of the ions present between layers are modified by organic ions. The toner can be prepared by a method including dispersing or emulsifying a toner constituent mixture liquid containing the colorant, the binder resin and / or a precursor thereof, and the laminar inorganic mineral, in an aqueous medium. The density of the laminar inorganic mineral measured by XPS for the toner surface before (A) and after(B) mixing and kneading satisfies the following relationship: A>B.
Owner:RICOH KK
Polyester Resin for Toner, Toner Composition and Resin Particle
ActiveUS20070281235A1Excellent low-temperatureExcellent grindabilityMixingDevelopersChemistryPolyester
[PROBLEMS] Disclosed is a heat-fusible electrostatic image developing toner which has an excellent balance between fixability at low temperatures and grindability and is excellent in glossiness after fixing. Also disclosed is a resin for toners. [MEANS FOR SOLVING PROBLEMS] A polyester resin for toners which is obtained by polycondensing a polyol component and a polycarboxylic acid component is characterized by containing 20-100 weight % of one or more polyester resins (A1) having a storage elastic modulus from 2.5×103 Pa to 5×106 Pa at 150° C. wherein the molar average cohesive energy of the polyol component is between 7.0×104 and 1.4×105 J.
Owner:SANYO CHEM IND LTD
Toner and developer
InactiveUS20080076055A1Excellent low temperature fixabilityChargeability deterioratesDevelopersParaffin waxEndotherm
To provide a developer that includes a carrier and a toner having base particles each containing a binder resin and a paraffin wax, wherein the base particle has a paraffin wax-originated endotherm from 2.0 J / g to 5.5 J / g at an endothermic peak as measured by DSC, an average circularity from 0.94 to 1.00, and a contact area-to-whole projected area ratio from 15% to 40%.
Owner:RICOH KK
Toner for developing electrostatic latent image, toner container, developer, image forming apparatus, process cartridge and method of preparing the toner
InactiveUS20080227015A1Good transferabilityGood low-temperature fixabilityElectrographic process apparatusDevelopersIonAspect ratio
A toner, including at least a binder resin; a colorant; and a modified layered inorganic mineral in which at least a part of ions between the layers are modified with an organic material ion, wherein the toner includes at least one external additive having an average primary particle diameter of from 80 to 180 nm and an aspect ratio of from 0.7 to 0.95.
Owner:RICOH KK
Toner and method of producing toner
ActiveUS9348247B2Excellent low temperature fixabilityGood storage stabilityDevelopersThermoplastic elastomerEngineering
An object of the present invention is to provide a toner that produces an excellent bending resistance in the output image and that also exhibits an excellent low-temperature fixability and an excellent storage stability. This toner includes a binder resin and a thermoplastic elastomer having a crystalline part, wherein the binder resin and the thermoplastic elastomer in the toner are compatible with each other and the toner has a crystalline part originating from the thermoplastic elastomer.
Owner:CANON KK
Toner
ActiveUS9599919B2Excellent low temperature fixabilityForming favorable toner images over a long period of timeDevelopersPolyesterPolymer science
Owner:CANON KK
Toner
Provided is a toner having an excellent low-temperature fixability and hot offset resistance, a broad fixing temperature latitude in low-temperature areas to high-temperature areas, and a high heat-resistant storage stability. The toner includes toner particles having a core-shell structure in which a shell phase containing a resin A is formed on a core containing a binder resin, a colorant and a wax. In measurement of resin A by a differential scanning calorimetry (DSC), the peak temperature TpA (° C.) of a maximum endothermic peak in the first temperature rise is at least 55° C. but not more than 80° C. In measurement of a viscoelasticity of resin A, the loss elastic modulus at TpA−10 (° C.) is at least 1×107 Pa but not more than 1×108 Pa. In measurement of the viscoelasticity of resin A, the loss elastic moduli at TpA (° C.), TpA+10 (° C.) and TpA+25 (° C.) satisfy specific conditions.
Owner:CANON KK
Toner
Provided is toner which is excellent in developing property, transferring property, and fixing property, hardly affected by its surrounding, and has good endurance. The toner has a peak temperature of maximum endothermic peak in the range of 60 to 100° C. in an endothermic curve of differential scanning calorimetry (DSC) measurement;silica particles in the toner contain a titanium element; andthe silica particles satisfy the following expressions.0.7≦(Ia1 / Ib1)≦2.00.7≦(Ia2 / Ib2)≦2.0where Ia1 represents a maximum intensity in the case of 2θ=25.3 deg, Ib1 represents a mean intensity in the cases of 2θ=25.3 deg+2.0 deg. and of 2θ=25.3 deg.−2.0 deg., Ia2 represents a maximum intensity in the case of 2θ=27.5 deg and Ib2 represents a mean intensity in the cases of 2θ=27.5. deg+2.0 deg. and of 2θ=27.5 deg.−2.0 deg.
Owner:CANON KK
Toner
ActiveUS7923190B2Excellent low temperature fixabilityHigh image densityDevelopersPolymer scienceCarboxylic acid
In a toner containing at least a binder resin, a colorant, an ester compound and a low-melting material, the ester compound is an ester of dipentaerythritol with a carboxylic acid having 18 or more to 25 or less carbon atoms, and, where the melting point of the ester compound is represented by Tm(A) (° C.) and the melting point of the low-melting material is represented by Tm(B) (° C.), the toner satisfies the relationship of:Tm(B)≦Tm(A)+5.
Owner:CANON KK
Toner and two-component developer
Owner:CANON KK
Toner for developing a latent electrostatic image, and image forming method and apparatus using the toner
To provide a toner containing toner particles, wherein each toner particle contains at least: a releasing agent having an average dispersed particle diameter of 0.1 to 0.5 μm; and a modified layered inorganic mineral in which at least a part of ions present in between layers of a layered inorganic mineral is replaced with an organic ion, wherein the toner has a ratio A / B of 0.2 to 2.0 where A denotes the average dispersed particle diameter of the releasing agent and B denotes an average dispersed particle diameter of the modified layered inorganic mineral, or a proportion of the dispersed particles of the releasing agent having a diameter of 1 μm or more in the dispersed particles of the releasing agent having a diameter of 0.5 μm or more is 20% by number or less.
Owner:RICOH KK
Toner production method
A method for producing a toner that comprises toner particles, each of which comprises a binder resin, which comprises a resin (A) capable of forming a crystalline structure, and a colorant, the method including: a pressure holding step of, after preparing toner particles, holding the toner particles for 5 minutes or more at a pressure of 2.0 MPa or more under conditions of a temperature T1 (° C.) represented by formula (1):20≦T1≦Tp2 (1)(wherein, Tp2 represents the onset temperature of the maximum endothermic peak derived from the resin (A)), wherein a peak temperature Tp1 of the maximum endothermic peak derived from the resin (A) during the first temperature rise of the toner particles as determined by differential scanning calorimetric measurement is 50° C. to 90° C.
Owner:CANON KK
Toner with specified amounts of the THF-soluble matter having certain intrinsic viscosity
ActiveUS7700254B2Excellent developabilityExcellent low temperature fixabilityDevelopersEngineeringIntrinsic viscosity
The present invention aims to provide a toner having excellent developability and excellent low-temperature fixability without causing adhesion of ejected sheets even in a high-speed oilless fixing system and capable of preventing a frameless printing from causing a twisted offseting phenomenon. Specifically, provided is a toner having toner particles including at least a binder resin and a colorant, in which, when the toner is dissolved in a tetrahydrofuran (THF) solvent at 25° C. for 24 hours, the ratio of a THF-soluble matter having an intrinsic viscosity of 5.0×10−2 dl / g or less with respect to the total amount of the THF-soluble matter in a GPC-RALLS-viscometer analysis is 15.0 mass % to 60.0 mass %, and the ratio of a THF-soluble matter having an intrinsic viscosity of 1.5×10−1 dl / g or more with respect to the total amount of the THF-soluble matter in a GPC-RALLS-viscometer analysis is 20.0 mass % to 40.0 mass %.
Owner:CANON KK
Toner and method for manufacturing toner
ActiveUS20110305984A1Excellent low temperature fixabilityFixing performanceDevelopersMonomer compositionPolyester
A toner having a toner particle including a core particle obtained by polymerizing a polymerizable monomer composition containing at least a polymerizable monomer, a colorant, a release agent, a polar resin, and a crystalline polyester in an aqueous medium and an outer shell formed by fixing resin fine particles to the surface of the core particle, wherein the resin constituting the resin fine particles is an amorphous resin and the acid value of the resin fine particles is 4.0 to 50.0 mgKOH / g.
Owner:CANON KK
Toner
ActiveUS9250548B2Excellent low temperature fixabilityInhibitionDevelopersMagnificationMaterials science
The toner comprises: toner particles each containing a binder resin and a releasing agent; and an organic-inorganic composite fine particle, wherein: the organic-inorganic composite fine particle comprises: a vinyl resin particle containing a vinyl resin, the vinyl resin containing THF-insoluble matter in an amount of 95% by mass or more; and inorganic fine particles which are exposed at surfaces of the respective organic-inorganic composite fine particles, the organic-inorganic composite fine particle 1) has a plurality of convexes derived from the inorganic fine particles on the surfaces thereof, 2) has a number average particle size of 70-500 nm, and 3) has a shape factor SF-2 as measured at a magnification of 200,000 times of 103-120, and an absolute value of difference between an SP value of the releasing agent and an SP value of the vinyl resin is 0.50 (cal / cm3)1 / 2 or less.
Owner:CANON KK
Image forming method and image forming apparatus
ActiveUS20070059063A1Easy to cleanExcellent low temperature fixabilityElectrographic process apparatusDevelopersImage transferCharge control
To provide an image forming method including forming a latent electrostatic image on a latent electrostatic image bearing member, developing the latent electrostatic image using a toner to form a visible image, transferring the visible image to a recording medium, and fixing a transfer image transferred on the recording medium, wherein the toner includes a toner base particle containing at least a binder resin, a colorant and an inorganic fine particle, and a charge control agent; and wherein the condition Xsurf>Xtotal is satisfied (where Xsurf is an average proportion of the inorganic fine particles in a near-surface region of the toner base particle, Xtotal is an average proportion of inorganic fine particles in the whole toner base particle.
Owner:RICOH KK
Toner
ActiveUS9341970B2Excellent low temperature fixabilityExcellent and stable low-temperature fixabilityDevelopersHeat flowPolyester resin
The toner includes a resin component containing a crystalline polyester resin and a polyester-type resin that has a long-chain monomer bonded by condensation at a terminal, the toner having, in a total heat flow measured by a temperature-modulated differential scanning calorimeter, an endothermic peak resulting from the crystalline polyester resin in a specific temperature range, and the percentage of the endothermic quantity of the endothermic peak in a reversing heat flow with respect to the endothermic quantity of the endothermic peak in the total heat flow being at least 20.0%.
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
ActiveUS9261804B2Excellent low temperature fixabilitySuppress of adhesionDevelopersEngineeringGlass transition
The present invention provides a toner that exhibits an excellent low-temperature fixability and an excellent ejected paper adhesiveness during high-speed printing, without affecting the long-term storage stability, in which the toner has a toner particle that contains a resin component, wherein the toner has, in a DSC curve measured with a differential scanning calorimeter, a glass transition temperature of at least 50° C. and not more than 65° C. and a cold crystallization peak during cooling of at least 40° C. and not more than 70° C., and has an endothermic peak in a DSC curve measured with a differential scanning calorimeter for the resin component of at least 70° C. and not more than 95° C.
Owner:CANON KK
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