КОМПОЗИЦИЯ ТОНЕРА

... 1. Тонер, содержащий смолу ядра, содержащую низкоплавкий воск или смесь низкоплавких восков, и смолу оболочки, в котором низкоплавкий воск имеет температуру плавления менее чем около 95°С и, необязательно, Tсмолы ядра ниже чем Tсмолы оболочки.2. Тонер по п.1, отличающийся тем, что тонер имеет показатель текучести расплава (MFI) по меньшей мере около 18 г/10 мин при температуре около 125°С и нагрузке 5 кг.3. Тонер по п.1, отличающийся тем, что Tсмолы оболочки меньше чем около 60°С.4. Тонер по п.1, отличающийся тем, что Tсмолы ядра по меньшей мере на 1°С меньше Tсмолы оболочки.5. Тонер по п.1, отличающийся тем, что Tсмолы ядра меньше чем около 60°С.6. Тонер по п.1, отличающийся тем, что смолу оболочки выбирают из группы, состоящей из стирол-акрилатов, стирол-бутадиенов, стирол-метакрилатов и их комбинаций.7. Тонер по п.1, отличающийся тем, что тонер дополнительно содержит красящее вещество.8. Тонер по п.1, отличающийся тем, что тонер является тонером, полученным агрегацией эмульсии.9. Тонер ...

ЗАЩИТНЫЙ ТОНЕР И СПОСОБ ЕГО ИСПОЛЬЗОВАНИЯ

КОМПОЗИЦИЯ ТОНЕРА С РАЗДЕЛИТЕЛЬНЫМИ ЧАСТИЦАМИ, ОБРАБОТАННЫМИ АГЕНТОМ РЕГУЛИРОВАНИЯ ЗАРЯДА

... 1. Частица тонера, содержащая сердцевину и оболочку, причем оболочка содержит разделительные частицы, обработанные агентом регулирования заряда, которые формируют выступы на поверхности частицы тонера.2. Частица тонера по п.1, которая получает заряд, величина которого превышает примерно 35 мкК/г в среде с температурой 80°F и относительной влажностью 80-85%, превышает примерно 65 мкК/г в среде с температурой 70°F и относительной влажностью 50% и превышает примерно 85 мкК/г в среде с температурой 70°F и относительной влажностью 10%.3. Частица тонера по п.1, для которой разделительные частицы выбирают из группы, состоящей из латексных частиц, полимерных частиц и частиц из алкилтриалкоксисилана.4. Частица тонера по п.1, в которой в качестве разделительных частиц используются латексные частицы, содержащие материал, выбираемый из группы, состоящей из каучука, акрилового, стирольно-акрилового, фтористого и полиэфирного латекса.5. Частица тонера по п.1, в которой в качестве разделительных частиц ...

Способ нанесения покрытий на частицы

Toner und Herstellverfahren für Toner

Toner, der ein Tonerpartikel umfasst, das eine Kern-Schale-Struktur aufweist, die einen Kern und eine Schale auf dem Kern enthält, wobeider Kern ein amorphes Harz A und ein kristallines Harz umfasst,die Schale ein amorphes Harz B umfasst,das amorphe Harz A ein Styrol-Acrylharz umfasst,ein Gehalt des Styrol-Acrylharzes, bezogen auf die Gesamtmasse des amorphen Harzes A, mindestens 50 Massen-% beträgt,ein mit folgender Formel (X) berechner Kompatibilitätsgrad A zwischen dem amorphen Harz A und dem kristallinen Harz mindestens 50% und nicht mehr als 100% beträgt:Kompatibilitätsgrad A (%)=100−(100×ΔH(A))/(ΔH(C)×C/100)undein mit folgender Formel (Y) berechner Kompatibilitätsgrad B zwischen dem amorphen Harz B und dem kristallinen Harz mindestens 0% und nicht mehr als 40% beträgt:Kompatibilitätsgrad B (%)=100−(100×ΔH(B))/(ΔH(C)×D/100)wobei in den Formeln (X) und (Y)ΔH(A) eine exotherme Quantität (in J/g) eines exothermen Peaks einer Harzmischung A bei einer kalorimetrischen Analyse mittels Differentialabtastung ...

EINGEKAPSELTES ELEKTROSTATOGRAPHISCHES TONERMATERIAL

Verfahren zum Aufbringen eines UEberzuges auf kleine Teilchen

ENCAPSULATED ELECTROSTATOGRAPHIC TONER MATERIAL

Preparation of encapsulated electrostatographic toner

In a process for the preparation of an electrostatographic toner material comprising encapsulating a core material containing colorant with a shell material in an aqueous medium to prepare encapsulted toner particles and drying the so prepared encapsulted toner particles, the improvement which comprises washing the encapsulated toner particles with an aqueous solution of a surface active agent in advance of subjecting them to the drying procedure.

PRODUCTION OF COATED CARRIER PARTICLES

... 1319441 Coated steel sheet particles; coating apparatus RANK XEROX Ltd 8 May 1970 [9 May 1969] 23804/69 Headings B2E and B2L [Also in Division G2] Coated steel sheet particles for use as carrier particles in two-component xerographic developers are produced by introducing a solution or dispersion of a resin in a carrier liquid into a fluidized bed of the particles while maintaining the bed at a temperature sufficient to evaporate the carrier liquid, maintaining the fluidized bed by air at a first pressure, and subjecting the central portion of the fluidized bed to jets of air at a second pressure higher than the first pressure to cause agitation of the particles within the bed, supplying the solution or dispersion via nozzles within said jets to cause atomisation thereof, and maintaining the fluidized bed at said temperature by heating said air at said first pressure. The coating material may be a synthetic organic resin, e.g. a terpolymer of methylmethacrylate, styrene and vinyl triethoxy ...

Method of forming fine polymer particles and polymer-encapsulated particulates

DRY TONER AND METHOD OF MAKING SAME

TONER COMPOSITIONS

Toner particles are provided which may, in embodiments, include a core and a shell, one or both of which may include a polyester gel. The gel in the shell and/or core may prevent a crystalline resin in the core from migrating to the toner surface.

IMAGING PROCESSES

The present disclosure provides processes for producing images with toner particles. In embodiments, toner particles of a certain diameter in size are applied to a substrate as an incomplete monolayer, and then fused to form an image that is a complete monolayer and possesses a thickness less than the diameter of the particles utilized to form the image.

MICRO CAPSULAR ELECTROSCOPIC MARKING PARTICLES INCLUDING A CORE OF PRESSURE FIXABLE MATERIAL ENCASED IN A DISCONTINUOUS SHELL

TONER COMPOSITION

Improved toner particles having a core-shell structure and related processes thereof are provided. The core of the toner comprises a first polymer, a complexed cationic dye pigment, and a heteropoly acid, and the shell comprises a second polymer. The heteropoly acid can effectively retain the complexed cationic dye pigment within the toner particle by complexing with one or more of the pigment cations, thereby improving the toner properties such as parent charge.

TONER PROCESSES

A process including mixing a sulfonated polyester resin, a colorant, and a coagulant; heating the resulting sulfonated polyester mixture; adding a polymetal halide and an anionic latex to form coated toner particles; and heating the coated toner particles is disclosed.

NANO-SIZED COMPOSITES CONTAINING POLYMER MODIFIED CLAYS AND METHOD FOR MAKING TONER PARTICLES USING SAME

A method for making toners to include clay composites. The clay composites are incorporated into emulsion of toner and used in making toner via emulsio n aggregation. Such toners may have a core and/or a shell and the clay composites may be included within the core, the shell or both.

CORE-SHELL POLYMER PARTICLES

Disclosed herein are nano-sized particles having a core portion comprising a crystalline polymer and a shell portion comprising a polymer derived from at least one monomer not miscible with the crystalline polymer of the shell portion.

METALLIC TONER COMPRISING METAL INTEGRATED PARTICLES

A toner and a toner process including providing at least one hybrid metallic toner component selected from the group consisting of hybrid metallic-latex particles, hybrid metallic-wax particles, hybrid metallic-colorant particles, and combinations thereof; contacting the at least one hybrid metallic toner component with one or more components selected from the group consisting of a latex polymer, a wax; and a colorant to form a blend; heating the blend at a temperature below the glass transition temperature of the latex polymer to form aggregated toner particles; adding a coalescing agent to the toner particles thereby coalescing the toner particles; and recovering the toner particles.

STYRENE ACRYLATE HYBRID TONER PROCESS UTILIZING A LOW VOC (VOLATILE ORGANIC COMPOUND) COALESCENT AGENT IN TONER SHELLS

Disclosed herein include processes of preparing hybrid toner compositions with toner particles having a core-shell type structure, where the shell contains a non- volatile coalescent agent. More particularly, embodiments relate to processes of preparing styrene acrylate hybrid toner compositions.

TONER COMPOSITIONS

A toner having charge control agents which impart excellent triboelectric charging characteristics. In embodiments, the toner particles are made by a process in which the toner particles are made without a shell which provides homogenous distribution of the charge control agents, providing a toner with higher charge and better environmental stability ...

HYBRID EMULSION AGGREGATE TONER

Emulsion aggregate toner compositions that use two different emulsion aggregation (EA) technologies are described. Namely, there is provided an emulsion aggregation toner that comprises a base resin composed of both styrene-acrylate and polyester resins. Such hybrid emulsion aggregation toner compositions are lower in cost but still maintain desirable developer properties like low minimum fusing temperature (MFT) and lower dielectric loss.

PROCESS FOR PREPARING LATEX COMPRISING CHARGE CONTROL AGENT

A process includes forming, by emulsion polymerization, polymer resin particles in a latex, the polymer resin particles being formed from a mixture including one or more monomer emulsions and a non-surfactant-based charge control agent, the emulsion polymerization is carried out with a solids content in a range from about 10 to about 30 percent by weight of the mixture, and forming toner particles from the polymer resin particles, the toner particles support a sufficient triboelectric charge for use under A-zone environmental conditions in a single-component development system.

IMPROVED PROCESS FOR PREPARING POLYESTER EMULSIONS

A phase inversion emulsification process includes dissolving a polyester resin in a mixture comprising (1) an organic solvent, (2) a first portion of a total amount of neutralizing agent, and (3) a first portion of water, neutralizing the dissolved polyester resin with a second portion of neutralizing agent, the second portion of neutralizing agent including the remaining amount of the total amount neutralizing agent, forming an emulsion by adding a second portion of water after the neutralizing step, and removing a portion of the organic solvent from the emulsion to provide a latex.

Procédé pour l'encapsulage d'eau et de composés en phase aqueuse

Procédé pour l'encapsulage d'eau et de composés en phase aqueuse

Electrostatic charge image developing toner, developer, toner cartridge, process cartridge, image forming apparatus, and image forming method

The invention relates to an electrostatic charge image developing toner, a developer, a toner cartridge, a process cartridge, an image forming apparatus, and an image forming method. The electrostatic charge image developing toner includes toner particles having a core that includes a block copolymer of a crystalline polyester block and an amorphous polyester block, and a shell that covers the core and includes an amorphous polyester resin having an ethylenically unsaturated double bond, and of which a surface layer part includes a crosslinked product of the amorphous polyester resin having an ethylenically unsaturated double bond.

Toner for developing electrostatic latent Image

Toner for electrostatic latent image development and method for preparing toner for electrostatic latent image development

The invention provides a toner for electrostatic latent image development and a method for preparing the toner for electrostatic latent image development. The toner for electrostatic latent image development is comprised toner particles containing toner core particle containing at least a binder resin and a shell layer coating the toner core particle. The shell layer is smoothened to a predetermined level. And, when cross-sections of the toner particles are observed using a transmission electron microscope, cracks approximately perpendicular to surfaces of the toner core particles are observable inside the shell layer. The toner for electrostatic latent image development provided by the present invention has better fixability and heat-resistant storage stability than the conventional toner.

Capsules containing of water and composed in aqueous phase or the absorbent substances

PROCESS FOR THE PREPARATION OF A TONER OR TONER CAPSULE FOR USE IN ELECTROPHOTOGRAPHY AND PRODUCT OBTAINED

PROCEEDED OF PREPARATION ONE TO THUNDER OR THUNDER OUT OF CAPSULE INTENDS TO BE USES IN ELECTROPHOTOGRAPHY AND PRODUCT OBTAINED

GLOW DISCHARGE POLYMERIZATION COATING OF TONERS FOR ELECTROPHOTOGRAPHY

전자사진용 토너 및 그의 제조방법

... 전자사진용 토너 및 그의 제조방법이 제공되며, 상기 토너는 중량평균분자량이 서로 상이한 2종의 수지를 포함하는 바인더, 착색제 및 이형제를 포함한다.

processo de toner incluindo modificação de reologia

Toner for electrostatic charge image developing, developer for electrostatic charge image developing, and image forming apparatus

Provided is a toner for electrostatic charge image developing, comprising a core layer which contains a first binder resin and a coloring agent, and a shell layer which contains a second binder resin and covers the core layer, characterized in that the following equation (1) and the following equation (2) are satisfied, - Equation (1) 2.0x105 G'(60) 4.0x106 - Equation (2) 10 G'(60)/G'(80) 40 wherein, in the equation (1) and the equation (2), G'(60) represents a storage elastic modulus (Pa) of the toner for electrostatic charge image developing measured under the conditions of a temperature of 60 DEG C, a vibration frequency of 6.28 rad/sec, and a strain amount of 0.01 to 0.5%, and G'(80) represents a storage elastic modulus (Pa) of the toner for electrostatic charge image developing measured under the conditions of a temperature of 80 DEG C, a vibration frequency of 6.28 rad/sec, and a strain amount of 0.01 to 0.5%. Also provided is a developer for electrostatic charge image developing ...

TONER AND PROCESS FOR PRODUCING THE SAME

A toner comprising an aqueous medium and, incorporated therein, core particles consisting of at least first resin particles, colorant particles and wax particles, wherein the core particles consist of nuclear particles resulting from aggregation of first resin particles and colorant particles and particles resulting from aggregation of first resin particles and wax particles. Consequently, the time for core particle formation processing can be shortened, and the occurrence of floating particles not participating in the aggregation of colorant particles and wax particles in liquid can be inhibited. Further, through suppression of macroaggregation of core particles, particles with small diameter and sharp particle size distribution can be prepared without the need of classifying step.

DEVELOPING AGENT AND METHOD FOR PRODUCING THE SAME

As a first dispersion liquid containing first fine particles and a second dispersion liquid containing second fine particles, those satisfy the relationship represented by the following formula (1) are used, and these two dispersion liquids are mixed with each other, and an aggregating agent and a pH adjusting agent are added thereto in sequence, whereby encapsulation is achieved by selective formation of core particles through aggregation of the first fine particles and shells through aggregation of the second fine particles. 15 mV|Z2Z1|5 mV(1) In the formula, Z1 and Z2 represent zeta potentials of the first dispersion liquid and the second dispersion liquid, respectively, measured when aluminum sulfate is added to each dispersion liquid in an amount of 1% by weight based on the solid content in each dispersion liquid.

TONER AND TWO-COMPONENT DEVELOPER

There are provided a toner and a two-component developer effective to make exudation of a release agent easy during fixing and to prevent occurrence of high-temperature offset, in which both the preservation stability and the fixing property are improved at the same time. The capsule toner comprises a toner base particle and a resin layer formed of fine resin particles with which a surface of the toner base particle is coated. In the capsule toner, both of the following expressions are satisfied: A Подробнее

Polymerized toner with high chargeability and good charge stability and preparation method thereof

The present invention relates to a polymerized toner with high chargeability and good charge-stability, and a method of preparing the polymerized toner. In particular, the present invention relates to a polymerized toner containing pigments, pigment stabilizers, charge control agents and binder resin monomers, and a method to prepare the polymerized toner by suspension polymerization of pigments, pigment stabilizers, charge control agents and binder resin monomers, wherein the pigment stabilizer is a styrene-butadiene-styrene block copolymer having the weight-average molecular weight of 2,000 to 200,000, and the charge control agent is a copolymer with sulfonate group having the weight-average molecular weight of 2,000 to 200,000.

Toner for electrophotography and process for producing the same

A toner for electrophotography having good electrification stability even under high-temperature and high-humidity conditions is disclosed, which comprises toner particles having a radical-formable substance at least on the surfaces thereof and a copolymer adherent to said surfaces, said copolymer containing as monomer units at least one vinyl group-containing carboxylic acid represented by formulae (I), (II), and (III) and a fluorine-containing vinyl monomer: см. иллюстрацию в PDF-документе wherein R1 represents hydrogen atom or methyl group and n is an integer of 1 to 8.

Electrophotographic toner and manufacturing method thereof

The electrophotographic toner of the present invention comprises toner particles and inorganic fine powder externally added to the toner particles. The toner particles comprise a core particle containing at least a resin, a coloring agent and wax, a first shell layer that is formed on the surface of the core particle to prevent inorganic fine powder from being buried, and a second shell layer that is formed on the surface of the first shell layer to retain inorganic fine powder. This makes it possible to inhibit inorganic fine powder that is an external additive from being buried in a toner and prevent deterioration of developing performance, reduction in transfer efficiency, blocking of a developer and toner aggregation.

Toner for electrostatic charge image developing, developer for electrostatic charge image developing, and image forming apparatus

Provided is a toner for electrostatic charge image developing, comprising a core layer which contains a first binder resin and a coloring agent, and a shell layer which contains a second binder resin and covers the core layer, characterized in that the following equation (1) and the following equation (2) are satisfied, 2.0x10⁵<=G'(60)<=4.0x10⁶ Equation (1) 10<=G'(60)/G'(80)<=40 Equation (2) wherein, in the equation (1) and the equation (2), G'(60) represents a storage elastic modulus (Pa) of the toner for electrostatic charge image developing measured under the conditions of a temperature of 60° C., a vibration frequency of 6.28 rad/sec, and a strain amount of 0.01 to 0.5%, and G'(80) represents a storage elastic modulus ...

TONER

A toner includes toner particles. The toner particles each include a toner core containing a binder resin, a first shell layer covering a surface of the toner core, and a second shell layer partially covering a surface of the first shell layer. The first shell layers include first domains composed of a first thermoplastic resin and second domains composed of a second thermoplastic resin. The first thermoplastic resin has a glass transition point of at least 35° C. and no greater than 66° C. The second thermoplastic resin has a glass transition point of at least 71° C. and no greater than 105° C. The second shell layers contain a third thermoplastic resin that is more hydrophobic than the first thermoplastic resin and the second thermoplastic resin. The third thermoplastic resin has a higher glass transition point than the first thermoplastic resin.

Capsule toner and method of manufacturing capsule toner

A capsule toner achieving both low temperature fixability and hot offset resistance, and a method of manufacturing the capsule toner are provided. A capsule toner includes a toner base particle containing a binder resin and a colorant, and a resin coating layer formed on a surface of the toner base particle. The resin coating layer includes a film of plural fine resin particles having different complex viscosities. The plural fine resin particles include first fine resin particles having complex viscosity at a softening temperature of the toner base particles of 5.0×102 Pa·s or more and 1.0×103 Pa·s or less, and second fine resin particles having complex viscosity at a softening temperature of the toner base particles of 1.0×104 Pa·s or more and 1.0×105 Pa·s or less.

Electrophotographic toner

A decolorable electrophotographic toner, containing a color former compound, a color developing agent, a binder resin, and a release agent, wherein the toner has a pH of from 6 to 9 when dispersed in water with a pH of from 5.5 to 7 at a mass ratio of toner/water of 1/10.

Toner and process for producing toner

A toner is provided which has toner particles and an inorganic fine powder; the toner particles being obtained by suspension polymerization using a specific polar resin. The toner is a toner in which; where, in displacement levels found in a micro-compression test in which a force is applied to a toner single particle at a loading rate of 9.8×106 N/sec to measure a displacement level (m) at a point of time where the force has reached a maximum force of 4.90×104 N, the displacement level of the toner at a measurement temperature of 25° C. is represented by X(25) and the displacement level of the toner at a measurement temperature of 50° C. by X(50), and the number average particle diameter of the toner is represented by D (m), the X(25), X(50) and D satisfies the relations: 0.10X(25)/D0.35(1) 30[X(50)X(25)]/X(25)×100150(2).

Supercritical fluid microencapsulation of dye into latex for improved emulsion aggregation toner

The present disclosure provides methods for incorporating a dye into latex particles via a supercritical fluid microencapsulation technique, in order to achieve improved dispersion of a colorant in the latex and an increase in color gamut.

TONER, PROCESS FOR PRODUCING TONER, AND TWO-COMPONENT DEVELOPING AGENT

A toner or two-component developer is provided. The toner includes toner base particles obtained by mixing in an aqueous medium a first resin particle dispersion, a colorant particle dispersion, and a wax particle dispersion, aggregating the mixed dispersion to form core particles at least part of which is melted, adding a second resin particle dispersion to a core particle dispersion in which the core particles are dispersed, and fusing the second resin particles with the core particles by heating. A GPC measurement of the second resin particles shows that the number-average molecular weight (Mn2) is 9000 to 30000, the weight-average molecular weight (Mw2) is 50000 to 500000, and the ratio (Mw2/Mn2) of the weight-average molecular weight (Mw2) to the number-average molecular weight (Mn2) is 2 to 10. The wax particles include at least a first wax and a second wax. An endothermic peak temperature (melting point Tmw1) of the first wax based on a DSC method is 50° C. to 90° C. The relationship ...

Toner

A toner includes toner particles. Each of the toner particles includes a composite core and a shell layer covering a surface of the composite core. Each of the composite cores is a composite of a toner core and foamable particles provided on a surface of the toner core. An amount of the foamable particles is at least 0.3% by mass relative to mass of the toner cores. Each of the foamable particles includes a base particle and a coat layer covering a surface of the base particle. The base particles are non-foamable. The coat layers include a foamable group. The foamable group is bonded to the surfaces of the base particles through a bond including a bond represented by formula “—O—Si—”.

ELECTROSTATIC LATENT IMAGE DEVELOPING TONER

An electrostatic latent image developing toner includes a plurality of toner particles each including a composite core and a shell layer covering a surface of the composite core. The composite core is a composite of a toner core and a plurality of organic particles each adhering to a surface of the toner core. The shell layer contains a first resin having a glass transition point of at least 50° C. and no greater than 90° C. The organic particles each contain a releasing agent and a second resin having a glass transition point of at least 90° C. and no greater than 110° C.

Electrostatic charge image developing toner set, electrostatic charge image developer set, and toner cartridge set

An electrostatic charge image developing toner set includes a white toner that includes white toner particles containing a core and a coating layer which does not contain a coloring agent and a colored toner that includes colored toner particles containing a core and a coating layer which does not contain a coloring agent, wherein with respect to a difference between an average equivalent circle diameter [Rw1] of the cores (Win) in the white toner particles and an average equivalent circle diameter [Rw2] of the white toner particles [Rw2−Rw1], and a difference between the average equivalent circle diameter [Rc1] of the cores (Cin) in the colored toner particles and the average equivalent circle diameter [Rc2] of the colored toner particles [Rc2−Rc1], a relationship of the following Expression (1) is satisfied: [Rw2−Rw1]<[Rc2−Rc1] (1).

ELECTROSTATIC LATENT IMAGE DEVELOPING TONER

An electrostatic latent image developing toner of the present disclosure contains a toner particle including a toner core containing a binder resin, and a shell layer coating a surface of the toner core. The shell layer is constituted by a resin containing a thermosetting resin. A zeta potential of the toner core measured in an aqueous medium adjusted to pH 4 is negative, and a zeta potential of the toner particle measured in an aqueous medium adjusted to pH 4 is positive. A pH at which the zeta potential of the toner particle measured in an aqueous medium is zero is 4.5 or higher and 7.0 or lower.

Positively chargeable toner

A positively chargeable toner includes a plurality of toner particles. The toner particles each include a toner mother particle and an external additive. The toner mother particle includes a toner core containing a binder resin and a shell layer covering a surface of the toner core. The external additive includes a plurality of silica particles. The silica particles are each present on a surface of the shell layer and include a silica base having a surface treated with a surface treatment agent. The surface treatment agent includes a first treatment agent having a carboxyl group in a molecule thereof. The toner core and each of the silica particles is bonded to each other through a specific covalent bond. An amount of ring-unopened oxazoline groups included in 1 g of the positively chargeable toner as measured by gas chromatography-mass spectrometry is at least 0.10 μmol and no greater than 100 μmol.

Method for producing electrophotographic toner

METHOD OF FORMING TONER IMAGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS CAPABLE OF REALIZING WIDE COLOR GAMUT

Toner for developing electrostatic latent images and production method of the same

A toner for developing electrostatic latent images, including a binder resin, and a colorant, wherein the binder resin includes an amorphous resin obtained from a radical polymerizable monomer unit containing a styrene type monomer and a (meth)acrylic ester type monomer and a crystalline resin, and a ratio (Q2/Q1) is 0.85 or more, where Q1 represents an amount of absorbed heat based on an endothermic peak derived from the crystalline resin in a first temperature rising process from 0 °C to 200 °C in measurement with a differential scanning calorimeter, and Q2 represents an amount of absorbed heat based on an endothermic peak derived from the crystalline resin in a second temperature rising process from 0 °C to 200 °C.

エマルジョン凝集トナー組成物

PRODUCTION OF TONER COMPOSITION

PURPOSE: To produce a capsulated toner compsn. having small particle size and narrow geometric particle size distribution. CONSTITUTION: One or more kinds of monomers are mixed with a pigment and a charge regulating additive as an optional component and the resultant mixture is dispersed in an aq. medium contg. a surfactant to prepare fine mist having a geometric particle size distribution of about 1.4 to about 1.7. A 2nd monomer is added and absorbed in the fine mist to narrow the geometric particle size distribution to about 1.2 to about 1.0 and the resultant mixture is polymerized to produce the objective toner compsn. separating a toner and contg. a core polymer resin, the pigment, the charge regulating additive as an optional component and a shell polymer. COPYRIGHT: (C)1994,JPO ...

TONER COMPOSITIONS WITH AMINO-CONTAINING POLYMERS AS SURFACE ADDITIVES

PROBLEM TO BE SOLVED: To provide an improved toner composition, having negatively chargeable toner particles coated with a positively chargeable surface additive. SOLUTION: The toner composition includes core particles that include a polymeric latex and an optional colorant, and amino-containing polymer particles dispersed on the outer surfaces of the core particles. COPYRIGHT: (C)2007,JPO&INPIT ...

ТОНЕРНАЯ КОМПОЗИЦИЯ И СПОСОБ

Изобретение относится к тонерной композиции и к способу ее получения. Композиция содержит (a) первую аморфную сложную полиэфирную смолу, содержащую сложный полиэфир, полученный из додеценилянтарной кислоты, додеценилянтарного ангидрида или их комбинации, где первый аморфный сложный полиэфир получен посредством каталитической полимеризации мономеров органического диола, органической дикислоты и додеценилянтарной кислоты, додеценилянтарного ангидрида или их комбинации; (b) вторую аморфную сложную полиэфирную смолу, содержащую сложный полиэфир, полученный из додеценилянтарной кислоты, додеценилянтарного ангидрида или их комбинации и агента ветвления, полученного из компонента поликислоты или полиола, где второй аморфный сложный полиэфир получен посредством каталитической полимеризации мономеров органического диола, органической дикислоты, додеценилянтарной кислоты, додеценилянтарного ангидрида или их комбинации и агента ветвления; (c) кристаллическую сложную полиэфирную смолу; (d) воск и ( ...

ПРОЯВЛЯЮЩИЙ ЭЛЕКТРОСТАТИЧЕСКОЕ ИЗОБРАЖЕНИЕ ТОНЕР, УСТРОЙСТВО ФОРМИРОВАНИЯ ИЗОБРАЖЕНИЙ, СПОСОБ ФОРМИРОВАНИЯ ИЗОБРАЖЕНИЙ И ТЕХНОЛОГИЧЕСКИЙ КАРТРИДЖ

Настоящее изобретение относится к проявляющему электростатическое изображение тонеру для проявления скрытого электростатического изображения, сформированного электрофотографическим способом, к способу электростатической записи и к способу электростатической печати; и к устройству формирования изображений, к способу формирования изображений и к технологическому картриджу, в которых используют проявляющий электростатическое изображение тонер. Заявленная группа изобретений включает проявляющий электростатическое изображение тонер, а также устройство формирования изображений и технологический картридж, которые включают вышеуказанный проявляющий электростатическое изображение тонер. При этом проявляющий электростатическое изображение тонер включает в себя частицы основы тонера, каждая из которых включает в себя связующую смолу и краситель; и внешнюю добавку, при этом каждая из частиц основы тонера имеет выступы на ее поверхности, среднее значение длин длинных сторон выступов составляет 0,1 мкм ...

ЧАСТИЦЫ ТОНЕРА ДЛЯ ВЫСОКОСКОРОСТНЫХ ОДНОКОМПОНЕНТНЫХ СИСТЕМ ПРОЯВЛЕНИЯ

... 1. Композиция тонера, содержащая:частицы тонера, содержащие:смолу;необязательный воск; инеобязательное красящее вещество,в которой:смола представляет собой систему из трех латексов, содержащую:латексное ядро, включающее базовый полимер;латексную оболочку, включающую оболочечный полимер; илатексный гель; итемпература стеклования Tg латексного ядра ниже, чем температура стеклования Tg латексной оболочки.2. Композиция тонера по п.1, в которой частицы тонера имеют диаметр от около 3 до около 10 мкм.3. Композиция тонера по п.1, в которой частицы тонера имеют круглость от около 0,945 до около 0,998.4. Композиция тонера по п.1, в которой частицы тонера имеют удельную поверхность по методу БЭТ от около 0,8 м/г до около 1,5 м/г.5. Композиция тонера по п.1, где композиция тонера представляет собой однокомпонентную композицию тонера.6. Композиция тонера по п.1, где:температура стеклования Tg латексного ядра составляет от около 40°C до около 65°C; итемпература стеклования Tg латексной оболочки составляет ...

Polymerisierter Toner und Verfahren zu dessen Herstellung

Mikrokapseltoner

Toner bestehend aus einer thermo- und/oder photolabilen Hüllwand und einem funktionellen Kernmaterial, dadurch gekennzeichnet, dass - die Hüllwand aus photo- und/oder thermolabilen Triazengruppen enthaltenden Polyurethan- und/oder Polyharnstoffpolymeren aufgebaut ist, - das funktionelle Kernmaterial ein Flüssigkeitsgemisch mit einer kinematischen Viskosität bei 100°C nach DIN 51562 kleiner 5·10-3 m2/s enthält und - die Hüllwand des Toners unterhalb 100°C mechanisch und thermisch stabil ist.

VERFAHREN ZUR HERSTELLUNG EINES EINGEKAPSELTEN ELEKTROSTATOGRAPHISCHEN TONERMATERIALS

Herstellungsverfahren eines elektrophotographischen Toners

POLYMERISIERTER, LADUNGSSTEIGERNDER SPACER PARTICLE

Ein Tonerpartikel weist einen Kern auf und eine Hülle umgibt den Kern, wobei die Hülle einen polymerisierten, ladungssteigernden Distanzpartikel enthält, der ein Copolymer eines Ladungskontrollmittels und eines Monomers ist. Ein Verfahren zur Herstellung von Tonerpartikeln enthält die Bildung eines Gemischs durch Zusammenmischen einer ersten Emulsion, die ein Harz enthält, optional eines Wachses, optional eines Farbstoffs, optional eines Tensids, optional eines Fällungsmittels sowie eines oder mehrerer zusätzlicher optionaler Zusatzmittel, Erhitzen des Gemischs, um aggregierte Partikel im Gemisch zu bilden, die Bildung einer zweiten Emulsion, die ein Monomer und ein Ladungskontrollmittel enthält, das Polymerisieren der zweiten Emulsion, um ein Copolymer des Monomers und des Ladungskontrollmittels zu bilden und das Einarbeiten des Copolymers in die Tonerpartikel, wobei die aggregierten Partikel einen Kern aus den Tonerpartikeln bilden.

Verfahren zur Herstellung von eingekapseltem Toner.

ELECTROSTATOGRAPHIC TONER MATERIAL

Encapsulated toner particles

In a process for the preparation of an electrostatographic toner material comprising encapsulating a core material containing colorant with a shell material in an aqueous medium to prepare encapsulated toner particles and drying the so prepared encapsulated toner particles, the improvement which comprises heating the so dried encapsulated toner particles.

POROUS PARTICLES WITH NOT POROUS BOWL

COPPER COMPLEX CONNECTION AND THESE CONTAINING ELECTROPHOTOGRAPHIC TONERS

ELECTROPHOTOGRAPHIC TONER

POLYMER PARTICLES HAVING INORGANIC MATERIAL DISPERSED THEREIN

Chemically prepared toner formulation including a borax coupling agent

A chemically prepared toner composition according to one example embodiment includes a core including a first polymer binder, a colorant and a release agent; a shell that is formed around the core and includes a second polymer binder; and a borax coupling agent between the core and the shell.

COLLOIDAL SIZE HYDROPHOBIC POLYMER PARTICULATE HAVING DISCRETE PARTICLES OF AN INORGANIC MATERIAL DISPERSED THEREIN

MICROCAPSULAR ELECTROSCOPIC MARKING PARTICLES INCLUDING A PRESSURE FIXABLE CORE AND A PRESSURE RUPTURABLE SHELL FORMED BY INTERFACIAL POLYMERIZATION

HYPERPIGMENTED LOW MELT TONER

A low melt toner includes a core having a core polystyrene-butyl acrylate resin, a crystalline polyester resin, a pigment present in an amount from about 7% to about 20% by weight of the low melt toner, and a paraffin wax; a ratio of the polystyrene-butyl acrylate resin to crystalline polyester resin is in a range from about 5:1 to about 7:1; and a shell disposed over the core including a shell polystyrene-butyl acrylate resin.

TONER COMPOSITION AND PROCESS

A toner composition comprising (a) a first lower molecular weight amorphous polyester resin comprising a polyester derived from dodecenyl succinic acid, dodecenyl succinic anhydride, or a combination thereof present in an amount of from about 5 to about 15 weight percent, based on the total weight of the first amorphous polyester; (b) a second higher molecular weight amorphous polyester resin comprising a polyester derived from dodecenyl succinic acid, dodecenyl succinic anhydride, or a combination thereof, and a branching agent derived from a polyacid or polyol component; wherein the dodecenyl succinic acid, dodecenyl succinic anhydride, or combination thereof is present in the second amorphous polyester in an amount of from about 5 to about 15 weight percent, based on the total weight of the second amorphous polyester; (c) a crystalline polyester resin; (d) a wax; and (e) optionally, a colorant.

SECURITY TONER AND PROCESS OF USING THEREOF

The present disclosure relates to toner compositions containing an IR-taggant, and method of making thereof. The disclosure also relates to method for confirming authenticity of an item.

CURABLE TONER COMPOSITIONS AND PROCESSES

Processes for producing emulsion aggregation toners are provided. In embodiments, methods of the present disclosure may be utilized to produce toners suitable for low melt applications, including use in flexible packaging applications, where low pile height is desired for low cost and flexibility. In embodiments, the EA toners may be prepared by optimizing the particle size of the emulsion, the choice of and amount of aggregating agent utilized, and the solids content of the emulsion.

TONER COMPOSITIONS

Toner particles are provided which may, in embodiments, include a core and a shell formed in situ. The resins utilized to form the core, the shell, or both, may be contacted with a water soluble initiator. The resin, in embodiments present in the shell, cross-links at a temperature near the temperature for coalescence, and may prevent a crystalline resin in the core from migrating to the toner surface.

STYRENE/ACRYLATE AND POLYESTER HYBRID TONER

A hybrid toner comprises at least one polyester resin, from about 1 to about 10% by weight of core resin of at least one styrene/acrylate resin, a shell, optionally a wax, and optionally a colorant, wherein the hybrid toner possesses one or more of: (a) less sensitivity to relative humidity as compared to a polyester toner without the styrene/acrylate resin; (b) a lower percentage of fine particles; (c) higher A zone charge; (d) lower B zone charge; or (e) lower J/A ratio.

METHOD OF FORMING FINE POLYMER PARTICLES AND POLYMER-ENCAPSULATED PARTICULATES

... 2078887 9213027 PCTABS00014 Fine polymer particles and polymer-encapsulated particles are formed by dissolving a polymer in a selective solvent, either lowering the temperature of the solution and/or adding thereto, a non-solvent for the polymer precipitating the polymer from the solution. Particulate material may be included when the solution is formed so that when the polymer precipitates out of the solution, the polymer encapsulates the particulate material. Two homopolymers are placed in solution with the selective solvent so that one polymer precipitates first out of the solution and is suspended therein, the other polymer is precipitated later out of the remaining solution, encapsulating the one polymer particles, forming core/shell polymer particles. Pigments, liposomes and other particulate material can be polymer encapsulated, the polymer and polymer-encapsulated particles being uniform in size and morphology.

ENCAPSULATED ELECTROSTATOGRAPHIC TONER PARTICLES AND A PROCESS FOR PRODUCING SUCH TONERS

Encapsulated electrostatographic toner particles and a process for making toner particles. The toner particles comprise a pressure fixable core encapsulated in a pressure rupturable shell with the outer surface of the shell being hydrophobic. Preferably, the outer surface of the shell is rendered hydrophobic by having a thermosetting resin precipitated thereon. The process for producing electrostatographic toner particles comprises preparing a core material, encapsulating a discrete portion of the core material in a shell by interfacial polycondensation, and then treating the outer surfaces of the shells with a thermosetting resin to render them hydrophobic. This enables the particles to be formed as a free-flowing, dry powder without requiring costly spray drying.

Nonmagnetic toner

A nonmagnetic toner which comprises toner particles comprising a binder resin, a colorant, and a wax ingredient and an inorganic fine powder, characterized in that 1) when a temperature at which the value of loss tangent (tand), which is the ratio between the storage elastic modulus (G') and loss elastic modulus (G') of the toner, is maximum in the temperature range of 50-80 DEG C is expressed by T1, then the value of storage elastic modulus of the toner at the temperature (T1), G'(T1), satisfies the relationship 5.00OE07=G'(T1)=1.00OE09 (dN/m2), 2) in the temperature range of 50-80 DEG C, the value of loss tangent (tand), which is the ratio between the storage elastic modulus (G') and loss elastic modulus (G') of the toner, is in the range of 0.80-2.00 at the consecutive temperatures in a range which is not narrower than 15 DEG C, and 3) in the temperature range of 120-160 DEG C, the value of loss tangent (tand), which is the ratio between the storage elastic modulus (G') and loss elastic ...

Toner

Clear styrene emulsion/aggregation toner

A clear styrene emulsion/aggregation toner. The present disclosure describes processes for making clear, high-gloss toners, including toner compositions resulting from such processes that find applications in overcoating and gloss enhancement.

Toner and two-component developer

TONER

Upgrading is attained in the development, transfer and fixation of toner. The toner is one having toner particles containing at least a binder resin, a wax and a colorant, characterized in that the glass transition temperature (TgA), as measured by a differential scanning calorimeter, of the toner is in the range of 40 ° to 60°C, and that the maximum peak temperature (P1), as measured by a differential scanning calorimeter, of the toner is in the range of 70° to 120°C, and that the glass transition temperature (TgB), as measured by a differential scanning calorimeter, of cyclohexane (CHX) insolubles among tetrahydrofuran (THF) solubles of the toner is in the range of 80° to 120°C, and that the above TgA and TgB satisfy a specified formula, and that the viscosity at 100°C, as measured by a flow tester temperature raising method, of the toner is in the range of 5000 to 30,000 Pa.s, and that the acid value of the cyclohexane (CHX) insolubles is in the range of 5 to 40 mgKOH/g. COPYRIGHT KIPO ...

COLORED TONERS

ELECTROPHOTOGRAPHIC TONER AND A METHOD FOR MANUFACTURING THE SAME CAPABLE OF WIDENING A LATEX FIXATION REGION BY INCLUDING A BINDER CONTAINING AT LEAST TOW RESIN WITH DIFFERENT WEIGHT AVERAGE MOLECULAR WEIGHTS

PURPOSE: Electrophotographic toner and a method for manufacturing the same are provided to prevent the change of the total fixable region due to the speed of a printing process. CONSTITUTION: Electrophotographic toner includes a binder containing at least two resins with different weight average molecular weights, a coloring agent, and a releasing agent. The shoulder curve of a gel permeation chromatography-chromatogram molecular weight distribution curve has a main peak(Mp) in a region of 1.0x10^4 to 3.0x10^4 g/mol. The shoulder curve starts in a region of 1.0x10^5 g/mol or more. In a storage elastic modulus curve according to the temperature change of the toner, a temperature, at which the reduction of a storage elastic modulus value starts, is between 50 and 67 degrees Celsius. The average particle size of the toner is between 3 and 9um. The average roundness of the toner is between 0.940 and 0.990. COPYRIGHT KIPO 2012 ...

TONER, A MANUFACTURE METHOD THEREOF, AND AN IMAGE FORMING APPARATUS USING THE SAME

PURPOSE: A toner and a manufacture method thereof are provided to show excellent storage stability at low temperature and to ensure high durability, a toner blocking prevention effect, an offset prevention effect and an improvement in fixation. CONSTITUTION: A toner comprises: a core consisting of a binder resin, wax and a coloring agent; and an external additive layer which covers the core. The core is prepared through extruding, stretching and pulverizing processes. The aspect ratio(A/B) and a diameter of the core are 20-100 and 4~20μm respectively, wherein A is long axis length and B is short axis length of the cross section of the core. The core contains 100 parts of binder resin, 1-20 parts of wax and 0.6-6 parts of coloring agent. The binder resin represents polyester or polystyrene-acrylic resin with 1,000~120,000 of number-average molecular weight and 90~170°C of softening point. © KIPO 2009 ...

Toner for developing electrostatic image, means for supplying the toner, image-forming apparatus employing the toner, and image-forming method employing the toner

TONER WITH HIGH GLOSS COMPRISING EMULSION AGGREGATION TONER PARTICLES CONTAINING ALUMINIZED SILICA AS COAGULATING AGENT

PURPOSE: A toner comprising emulsion aggregation toner particles is provided to form and develop images with high level of gloss and good quality while maintaining a low minimum fixing temperature. CONSTITUTION: The toner comprises emulsion aggregation toner particles which contain a binder including a non-crosslinked styrene acrylate polymer, at least one coloring agent, at least one wax and aluminized silica, wherein an amount of aluminum metal in the toner particles is from about 50 ppm to about 600 ppm. Alternatively, the toner comprises emulsion aggregation toner particles which contain a core and a shell, wherein the core is comprised of a binder including a non-crosslinked styrene acrylate polymer, at least one coloring agent, at least one wax and aluminized silica, and the shell is comprised of a second non-crosslinked styrene acrylate polymer having a glass transition temperature higher than that of the non-crosslinked styrene acrylate polymer in the core. © KIPO 2007 ...

TONER FOR DEVELOPING ELECTROSTATIC CHARGE IMAGE, TONER SUPPLY MEANS AND IMAGE-FORMING APPARATUS EMPLOYING TONER, AND IMAGE-FORMING METHOD USING TONER

Disclosed is a toner for developing an electrostatic charge image including at least a binder resin, a coloring agent, and a release agent. The toner for developing an electrostatic charge image has precisely controlled dynamic viscoelasticity characteristics which are represented as a loss tangent by using both a binder rein including a combination between a low molecular weight binder resin and a high molecular weight binder resin and a release agent having appropriate compatibility with the binder resin. According to an embodiment of the present invention, the toner for developing the electrostatic charge image can satisfy all of developing stability, developing lifetime, fixability, charge stability, brilliance, anti-offset properties, heat preservation properties, and the like at a certain level or higher. COPYRIGHT KIPO 2016 (AA) Content(random unit) (BB) Molecular weight ...

Toner having core-shell structure and method of preparing the same

A toner having a core-shell structure and a method of preparing the same. Since a shell includes a crosslinked resin, a toner preventing hot offsets and having excellent charge stability is prepared.

Pressure fixing toner and preparation method thereof

The present invention relates to a pressure fixing toner which can be fixed at a lower temperature to enable energy-efficient high-speed printing, and a preparation method thereof. The pressure fixing toner comprises: a core which comprises a wax mixture including a wax and a pigment; and a shell which comprises a polymer or copolymer of at least one kind of polymerizable monomer selected from the group consisting of an aromatic vinyl-based monomer, an acrylate-based monomer, a methacrylate-based monomer and a diene-based monomer, and surrounds the core. The content of the wax of the core is 44-93 parts by weight based on 100 parts by weight of the total toner.

Electrostatic image developing toner and producing method of the same

A method of producing an electrostatic image developing toner comprising toner particles comprising a binder resin containing at least a non-crystalline polyester resin having a crosslinking structure and a crystalline polyester resin, the method comprising the steps of (a-1) preparing a crystalline polyester resin particle aqueous dispersion liquid; (a-2) preparing a polymerizable unsaturated non-crystalline polyester resin aqueous dispersion liquid; (b) preparing crosslinking non-crystalline polyester resin particles by adding a radical polymerization initiator to the aqueous dispersion liquid of particles containing the non-crystalline polyester resin having a polymerizable unsaturated bond; (c) preparing core particles by aggregating at least the particles containing the crystalline polyester resin in an aqueous medium; and (d) preparing a shell layer containing the non-crystalline polyester resin having a crosslinking structure by fusing the particles containing the non-crystalline polyester resin having a crosslinking structure on surfaces of the core particles in an aqueous medium.

Toner for electrostatic charge image development and method for producing the same

Provided is a toner for an electrostatic charge image development having toner particles which contain: a binder resin; a colorant; and a compound represented by Formula (1) in an amount of 0.1 to 65 ppm based on the total weight of the toner particles: wherein R 1 and R 2 each respectively represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group.

Toner for electrostatic use

Toner particles having excellent cleaning properties and glossing properties. The toner particles include a binder resin, a releasing agent, and a colorant, wherein toner particles satisfy the following conditions. 50° C.≦ T 1/2 −T g ≦100° C.  (1) 50° C.≦ T g 60° C.  (2)

Clear Styrene Emulsion/Aggregation Toner

The present disclosure describes processes for making clear, high-gloss toners, including toner compositions resulting from such processes that find applications in overcoating and gloss enhancement.

Toners Containing Large Strontium Titanate Particles

Disclosed is a toner composition comprising: (a) resin particles; and (b) strontium titanate particles having an average particle diameter of at least about 400 nm.

ELECTROPHOTOGRAPHIC TONER

A decolorable electrophotographic toner, containing a color former compound, a color developing agent, a binder resin, and a release agent, wherein the toner has a pH of from 6 to 9 when dispersed in water with a pH of from 5.5 to 7 at a mass ratio of toner/water of 1/10. 110.-. (canceled)11. A decolorable electrophotographic toner , being produced by aggregating and fusing a particle which includes a color former compound and a color developing agent , a binder resin , and a release agent with use of an aggregating agent and having a pH at 25° C. of from 6 to 9 when dispersed in water with a pH of from 5.5 to 7 at a mass ratio of toner/water of 1/10.12. The toner according to claim 11 , wherein the toner has a pH at 25° C. of from 6 to 7.5 when dispersed in water with a pH of from 5.5 to 7 at a mass ratio of toner/water of 1/10.13. The toner according to claim 11 , wherein the upper limit of the content of the aggregating agent contained in the toner is 1% by mass.14. The toner according to claim 12 , wherein the upper limit of the content of the aggregating agent contained in the toner is 1% by mass.15. The toner according to claim 11 , wherein the aggregating agent is an acidic metal salt and the upper limit of the content of the acidic metal salt contained in the toner is 1% by mass.16. The toner according to claim 12 , wherein the aggregating agent is an acidic metal salt and the upper limit of the content of the acidic metal salt contained in the toner is 1% by mass.17. The toner according to claim 15 , wherein the toner is produced by washing a particle obtained by the aggregation and the fusion until the pH of a filtrate at 25° C. becomes 6 to 9.18. The toner according to claim 16 , wherein the toner is produced by washing a particle obtained by the aggregation and the fusion until the pH of a filtrate at 25° C. becomes 6 to 9.19. The toner according to claim 17 , wherein the toner is produced by washing until the electrical conductivity of the filtrate ...

Toner to develop electrostatic charge image, device to supply the same, and apparatus and method of forming image using the same

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.

Super low melt toner with core-shell toner particles

A toner particle having a core and a shell, and a method for making the toner particle. The core includes a crystalline resin and the shell includes an amorphous resin. The shell is substantially to completely free of the crystalline resin. The toner particle permits inclusion of greater amounts of crystalline resin materials in the core, thereby lowering the minimum fusing temperature of the toner formed from the particles.

Toner Process

The present disclosure describes a toner produced using a coalescing temperature lower than the melting point of a wax in the toner, quench cooling or both. The resulting toners can exhibit reduced dielectric loss and improved tribo charging.

Toners for electrophotography

The present invention relates to a toner for electrophotography including core-shell particles as a resin binder each including a core portion containing an amorphous resin (A) having a softening point of 105° C. or lower which is obtained by polycondensing a carboxylic acid component containing an alkenyl succinic acid with an alcohol component; and a shell portion containing an amorphous resin (B) obtained by polycondensing an alcohol component containing an aliphatic diol having 2 to 6 carbon atoms with a carboxylic acid component containing a trivalent or higher-valent polycarboxylic acid compound in an amount of 20 mol % or less. The toner for electrophotography according to the present invention is excellent in heat resistant storage property, low-temperature fusing property and durability.

PROCESS FOR PRODUCING TONER FOR ELECTROPHOTOGRAPHY

The present invention relates to a process for producing a toner for electrophotography which includes the step of fusing aggregated particles containing resin particles (A) and releasing agent particles in an aqueous mixed solution containing the aggregated particles and an anionic surfactant having a polyalkylene glycol moiety with an average molar number of addition of an alkylene oxide having 2 to 3 carbon atoms of from 5 to 100 after and/or while adjusting a pH value of the aqueous mixed solution to 2.0 to 6.0 as measured at 25° C., and a toner for electrophotography obtained by the process. 1. A process for producing a toner for electrophotography , comprising fusing aggregated particles comprising resin particles (A) and releasing agent particles in an aqueous mixed solution comprising the aggregated particles and an anionic surfactant having a polyalkylene glycol moiety with an average molar number of addition of an alkylene oxide having 2 to 3 carbon atoms of from 5 to 100 , after , while , or during and after adjusting a pH value of the aqueous mixed solution to 2.0 to 6.0 as measured at 25° C.3. The process for producing a toner for electrophotography according to claim 1 , further comprising producing aggregated particles (ii) by:(1) mixing and aggregating the resins particles (A), the releasing agent particles and an aggregating agent in an aqueous medium, to obtain aggregated particles (i); and(2) adding resin particles (B) comprising amorphous polyester (b) to the aggregated particles (1) obtained in said (1) mixing, to obtain the aggregated particles (ii).4. The process for producing a toner for electrophotography according to claim 3 , wherein said fusing the aggregated particles comprises (4) maintaining the aggregated particles (ii) at a temperature lower by 10° C. than a glass transition point of the amorphous polyester (b) or higher but a temperature higher by 5° C. than the glass transition point or lower claim 3 , to obtain fused core/shell ...

TONER AND METHOD FOR ITS PREPARATION

Disclosed are a toner and a preparation method thereof. The toner of the invention has honeycomb-shaped core-shell structured particles. The honeycomb-shaped core-shell structured particles comprise two or more core layers. Each core layer is completely covered by a shell layer. 19-. (canceled)10. A toner having honeycomb-shaped core-shell structured particles , said particles comprising two or more core layers , and each core layer being completely covered by a shell layer.11. The toner of claim 10 , wherein the number of core layers is within the range of 2 to 30.12. The toner of claim 11 , wherein the particles are in a peanut shape claim 11 , a strawberry shape claim 11 , or a potato shape.13. The toner of claim 10 , wherein each core layer and its shell layer form a honeycomb unit claim 10 , and wherein two adjacent honeycomb units share a shell layer.14. The toner of claim 13 , wherein the number of core layers is within the range of 2 to 30.15. The toner of claim 14 , wherein the particles are in a peanut shape claim 14 , a strawberry shape claim 14 , or a potato shape.16. A method for preparing a toner having honeycomb-shaped core-shell structured particles which comprise two or more core layers claim 14 , each of which is completely covered by a shell layer claim 14 , said method comprising:(a) dispersing a core-forming binding resin, a colorant, and a dispersant in an organic solvent to form an oil phase dispersing liquid, adding water to the oil phase dispersing liquid to emulsify and form a mixture emulsion;(b) under shearing, adding a coagulating agent to the resultant emulsion from step (a) to form a dispersion of the coagulated core particles;(c) to the resultant dispersion from step (b), adding a shell-forming binding resin dispersion which contain shell-forming binding resin particles, wherein the shell-forming binding resin particles form shells surrounding the coagulated core particles and yield coagulated core-shell structured particles ...

TONERS FOR ELECTROPHOTOGRAPHY

The present invention relates to a toner for electrophotography which is excellent in low-temperature fusing ability and heat-resistant storage property as well as charging stability under high-temperature and high-humidity conditions and smear resistance (rubbing fixability), and a process for producing the toner. The toner for electrophotography according to the present invention includes core-shell particles each including a core containing a amorphous resin (A) obtained by polycondensing an alcohol component containing an aliphatic diol having 2 to 6 carbon atoms with a carboxylic acid component and a shell containing a amorphous composite resin (B) which contains a segment (B1) formed of a polyester resin and a segment (B2) formed of a styrene-containing addition polymer as a constitutional unit thereof. 1. A toner for electrophotography comprising core-shell particles each comprising a core comprising an amorphous resin (A) obtained by polycondensing an alcohol component comprising an aliphatic diol having 2 to 6 carbon atoms with a carboxylic acid component and a shell comprising an amorphous composite resin (B) which comprises a segment (B1) formed of a polyester resin and a segment (B2) formed of a styrene-containing addition polymer as a constitutional unit thereof.2. The toner for electrophotography according to claim 1 , wherein the alcohol component of the amorphous resin (A) comprises the aliphatic diol having 2 to 6 carbon atoms in an amount of 80 mol % or more.3. The toner for electrophotography according to claim 1 , wherein the amorphous resin (A) has a softening point of not lower than 70° C. and not higher than 140° C.4. The toner for electrophotography according to claim 1 , wherein the amorphous composite resin (B) is present in an amount of from 10 to 120 parts by mass on the basis of 100 parts by mass of the amorphous resin (A).5. The toner for electrophotography according to claim 1 , wherein the segment (B2) is present in an amount of from ...

Toner for electrostatic latent image development

A toner for electrostatic latent image development is comprised toner particles containing toner core particle containing at least a binder resin and a shell layer coating the toner core particle. The shell layer is smoothened to a predetermined level. And, when cross-sections of the toner particles are observed using a transmission electron microscope, cracks approximately perpendicular to surfaces of the toner core particles are observable inside the shell layer.

Emulsion aggregation toner process comprising direct addition of surface-treated pigment

A method of making a toner that includes adding pigments into an emulsion aggregation toner without first preparing a pigment dispersion. The method eliminates the pigment dispersion step in the manufacture of emulsion aggregation toilers by surface-treating pigments. Dry surface-treated pigments can be directly incorporated into the toner prior to aggregation in the aggregation coalescence process without the need to first prepare aqueous pigment dispersions.

RESIN PARTICLES AND METHOD FOR PRODUCING SAME

Provided are resin particles which have excellent thermal bondability, excellent low-temperature fixability, excellent heat resistant storage stability and high bonding strength, and which provide a coating film that has high gloss and excellent water resistance. The resin particles are composed of resin particles (X), each of which has a shell layer (S) containing a crystalline polyurethane resin (B) on the surface of a core layer (Q) containing a crystalline resin (A). The maximum peak temperature (Ta) of the heat of fusion of the crystalline resin (A) is 40 to 70° C. and the maximum peak temperature (Tu) of the heat of fusion of the crystalline polyurethane resin (B) is 50 to 90° C. 114-. (canceled)15. A method for producing a resin particle (X) resulting from attachment of a resin particle (E) to the surface of a resin particle (G) containing a crystalline resin (A) , the resin particle (X) being obtained by following a step of dispersing a solution (D) prepared by dissolving the crystalline resin (A) in an organic solvent (C) in a dispersion medium (F) containing the resin particle (E) containing a crystalline polyurethane resin (B) , thereby obtaining a dispersion (DF) , and then removing the organic solvent (C) and the dispersion medium (F) from the dispersion (DF) , wherein the resin particle (X) is structured to have a shell layer (S) containing the crystalline polyurethane resin (B) on the surface of a core layer (Q) containing the crystalline resin (A) , the maximum peak temperature (Ta) of the heat of fusion of the crystalline resin (A) is 40 to 70° C. , and the maximum peak temperature (Tu) of the heat of fusion of the crystalline polyurethane resin (B) is 50 to 90° C.16. The method for producing a resin particle (X) according to claim 15 , wherein the crystalline resin (A) is obtained from its precursor (A0).17. The method for producing a resin particle (X) according to claim 16 , wherein the precursor (A0) is a combination of a prepolymer (α) having a ...

Electrostatic latent image developing toner

The present disclosure relates to an electrostatic latent image developing toner containing a toner particle including a toner core containing a binder resin and a shell layer coating a surface of the toner core. The shell layer contains a unit derived from a monomer of a thermosetting resin, and a unit derived from a thermoplastic resin. The thermosetting resin is one or more resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin. The toner particle contains fine particles in an interfacial portion between the toner core and the shell layer, and the fine particles have a charge property opposite to that of the toner, or have a volume resistivity lower than both a volume resistivity of the binder resin and a volume resistivity of the shell layer.

TONER FOR DEVELOPING ELECTROSTATIC CHARGE IMAGE AND METHOD FOR PREPARING THE SAME

A toner for developing an electrostatic charge image includes three or more elements selected from a group including an iron element, a silicon element, a sulfur element and a fluorine element and a binder resin including an amorphous polyester-based resin. 1. A toner for developing an electrostatic charge image , comprising:three or more elements selected from a group consisting of an iron element, a silicon element, a sulfur element, and a fluorine element,{'sup': 3', '4', '3', '3', '3', '4, 'wherein, when included, a content of the iron element in the toner is in a range of 1.0×10to 1.0×10ppm, a content of the silicon element in the toner is in a range of 1.0×10to 8.0×10ppm, a content of the sulfur element in the toner is in a range of 500 to 3,000 ppm, and a content of the fluorine element is in a range of 1.0×10to 1.0×10ppm; and'}a binder resin comprising an amorphous polyester-based resin, wherein:an aromatic ring concentration of the amorphous polyester-based resin is in a range of 4.5 to 5.8 mol/kg;a weight average molecular weight (MW) of the amorphous polyester-based resin is in a range of 7,000 to 50,000;a glass transition temperature (Tg) of the amorphous polyester-based resin is in a range of 50 to 70° C.; and [{'br': None, 'i': Tg=', 'MW', 'a', 'a−, '7.26×ln()+(where −19.33≦4.29)\u2003\u2003(Equation 1)'}, {'br': None, 'i': Tg=', 'MW', 'b', 'b≦, '2.67×ln()+(where 21.07≦39.48).\u2003\u2003(Equation 2)'}], 'if a weight average molecular weight (MW) of the amorphous polyester-based resin is in a range of 7,000 or more to less than 14,000, Equation 1 is satisfied, and if the weight average molecular weight (MW) is in a range of 14,000 or more to 50,000 or less, Equation 2 is satisfied2. The toner of claim 1 , wherein:the amorphous polyester-based resin has a polycarboxylic acid component as a structural unit, and the polycarboxylic acid component has a substituent group corresponding to three or more carboxyl groups.4. The toner of claim 3 , wherein:B is a ...

Electrostatic charge image developing toner

An electrostatic charge image developing toner includes a plurality of toner particles. Each of the plurality of toner particles includes a toner core and a shell layer covering the toner core. The shell layer contains a thermosetting resin. A content ratio of a toner component insoluble in tetrahydrofuran is at least 90 mass % relative to mass of the toner. Melt viscosity of the toner at 75° C. is at least 1.0×10 4 Pa·s and no greater than 1.0×10 5 Pa·s. The thermosetting resin is preferably a melamine resin or a urea resin. The toner core preferably contains a binder resin, and the binder resin has a softening point (Tm) of at least 85° C. and no greater than 95° C.

BASE PARTICLE AND ELECTROSTATIC IMAGE DEVELOPING TONER

Provided are a toner base particle having a core-shell structure, which comprise: a core particle containing at least a binder resin and a colorant; and as a shell, a resin fine particle containing at least a release agent and attaching to the surface of the core particle, wherein a mass of the release agent contained in the specific area is from 50 to 100% of a mass of all release agents in said toner base particle, and a shape factor of said toner base particle is 150 or more, and an electrostatic image developing toner obtained by externally adding an external additive to the toner base particle. 1. A toner base particle having a core-shell structure , which comprise: a core particle containing at least a binder resin and a colorant; and as a shell , a resin fine particle containing at least a release agent and attaching to the surface of the core particle , whereinwhen out of TEM images of a cross-section of said toner base particle, a cross-sectional image where a long diameter of the cross-section is 80% or more of a volume median diameter (Dv) of said toner base particle is image-processed and an approximate ellipse having an area corresponding to 84.6% of a cross-sectional area of said toner base particle is delineated inside of said cross-section, a mass of the release agent contained outside of an approximate oval sphere obtained by rotating said approximate ellipse around the major axis thereof is from 50 to 100% of a mass of all release agents in said toner base particle, and a shape factor of said toner base particle is 150 or more.2. A toner base particle having a core-shell structure , which comprise: a core particle containing at least a binder resin and a colorant; and as a shell , a resin fine particle containing at least a release agent and attaching to the surface of the core particle , whereina mass of the release agent in said shell is from 50 to 100% of a mass of all release agent in said toner base particle and a shape factor of said toner ...

Method for preparing suspension polymerization toner of core-shell structure

A method for preparing suspension polymerization toner of core-shell structure comprises following steps: 1) preparing a monomer oil phase containing a certain amount of polar resin forming toner soft core resin and aqueous dispersion liquid respectively; 2) adding the monomer oil phase into the aqueous dispersion liquid, transferring a mixture into a reactor after high-speed shearing and suspension granulation, and carrying out a first heating polymerization reaction to obtain toner particles of soft-core hard-shell structure; 3) taking the toner particles of soft-core hard-shell structure as a core layer, adding a cationic monomer component, and carrying out a second polymerization reaction through a water-soluble initiator to obtain the toner particles of soft-core hard-shell structure with dense charge surface layers uniformly distributed on outer surfaces; and 4) cleaning, filtering, and sufficiently drying a preceding product, and then adding silicon dioxide.

ELECTROSTATIC LATENT IMAGE DEVELOPING TONER

An electrostatic latent image developing toner includes a plurality of toner particles each including a core and a shell layer. The shell layer includes a first domain that is a non-crosslinked resin film and second domains that are crosslinked resin particles. The crosslinked resin has a higher glass transition point than the non-crosslinked resin. In a cross-sectional image of a toner particle, a proportion of a total length of a surface region of the core covered by the first domain is at least 45% and no greater than 80% relative to a circumferential length of the core. In a cross-sectional image of a toner particle, a proportion of second domains adhering to a surface of the first domain is at least 30% by number and no greater than 70% by number relative to all the second domains included in the toner particle. 1. An electrostatic latent image developing toner comprising a plurality of toner particles each including a core and a shell layer disposed over a surface of the core , whereinthe shell layer includes at least one first domain having a film shape and second domains each having a particle shape,the at least one first domain is substantially formed from a non-crosslinked resin and the second domains are substantially formed from a crosslinked resin,the crosslinked resin has a higher glass transition point than the non-crosslinked resin,in a cross-sectional image of one of the plurality of toner particles, a proportion of a total length of at least one surface region of the core covered by the at least one first domain is at least 45% and no greater than 80% relative to a circumferential length of the core, andin a cross-sectional image of one of the plurality of toner particles, a proportion of second domains adhering to a surface of the at least one first domain is at least 30% by number and no greater than 70% by number relative to all the second domains included in the toner particle.2. The electrostatic latent image developing toner according to ...

PROCESS TO PREPARE POLYESTER PHASE INVERSION LATEXES

A process includes dissolving a polyester resin in an organic solvent to form a solution, the polyester resin has a latex-destabilizing cation, removing substantially all of the latex-destabilizing cation, neutralizing the solution of the polyester resin, adding a sufficient amount of water to the neutralized solution form an emulsion, and removing a portion of the organic solvent from the emulsion to form a latex of the polyester resin. 1. A process comprising:dissolving a polyester resin in an organic solvent to form a solution, wherein the polyester resin has a latex-destabilizing cation;removing substantially all of the latex-destabilizing cation;neutralizing the solution of the polyester resin;adding a sufficient amount of water to the neutralized solution to form an emulsion; andremoving a portion of the organic solvent from the emulsion to form a latex of the polyester resin.2. The process of claim 1 , wherein the polyester resin is amorphous.3. The process of claim 1 , wherein the polyester resin is crystalline.4. The process of claim 1 , wherein the organic solvent comprises methylethylketone (MEK) claim 1 , isopropanol claim 1 , or combinations thereof.5. The process of claim 1 , wherein the latex-destabilizing cation comprises a monovalent cation claim 1 , a divalent cation claim 1 , or combinations thereof.6. The process of claim 5 , wherein the monovalent cation is selected from the group consisting of lithium ion claim 5 , potassium ion claim 5 , sodium ion claim 5 , and combinations thereof.7. The process of claim 5 , wherein the divalent cation is selected from the group consisting of tin claim 5 , iron claim 5 , copper claim 5 , calcium claim 5 , magnesium claim 5 , and zinc ions.8. The process of claim 1 , wherein the latex-destabilizing cation comprises a mixture of potassium and tin ions.9. The process of claim 1 , wherein the latex-destabilizing cation is present in an insoluble fraction of the solution.10. The process of claim 9 , wherein the ...

SUSPENSION POLYMERIZATION TONER OF CORE-SHELL STRUCTURE WITH POSITIVE CHARGES AND PREPARATION METHOD

Suspension polymerization toner of core-shell structure with positive charges comprises core-shell composite particles prepared by mixing composition forming toner core particles with aqueous dispersion liquid, carrying out a heating polymerization reaction to obtain suspension dispersion liquid of toner soft core particles, and carrying out a water-based polymerization reaction to form the core-shell composite particles of which an outer surface of the toner core particles are coated with the rigid shell layer with dense positive charges. 1. A suspension polymerization toner of core-shell structure with positive charges , comprising core-shell composite particles prepared by mixing a composition forming toner core particles with aqueous dispersion liquid , carrying out a heating polymerization reaction to obtain a suspension dispersion liquid of toner soft core particles , then uniformly mixing a monomer emulsion forming a rigid shell layer and a cationic monomer with the suspension dispersion liquid of the toner soft core particles , and carrying out a water-based polymerization reaction to form the core-shell composite particles of which an outer surface of the toner core particles are coated with the rigid shell layer with dense positive charges.2. The suspension polymerization toner of core-shell structure with positive charges of claim 1 , wherein a weight ratio of the rigid shell layer of the core-shell composite particles and the toner soft core particles is 20:80-1:99; an average thickness of the rigid shell layer is 0.05-0.2 μm; and a coverage ratio of the rigid shell layer on the outer surface of the toner soft core particles is greater than 50%.3. The suspension polymerization of core-shell structure with positive charges of claim 1 , wherein an average particle diameter of the core-shell composite particles is 5-10 μm; an average sphericity of the core-shell composite particles is 0.950-0.995.4. A preparation method of the suspension polymerization ...

ELECTROSTATIC LATENT IMAGE DEVELOPING TONER

A composite core of a toner particle is a composite of a toner core containing a polyester resin and a plurality of resin particles each containing a first resin. A shell layer partially covering a surface of the composite core is a film containing a second resin. The first resin has a glass transition point that is 10° C. or more higher than a glass transition point of the second resin. The plurality of resin particles each have a particle diameter that is 1.5 times or more greater than a thickness of the shell layer. An amount of the resin particles is at least 0.3 parts by mass and no greater than 2.0 parts by mass relative to 100 parts by mass of the toner cores. The resin particles have a positive zeta potential at pH 4. 1. An electrostatic latent image developing toner comprising:a plurality of toner particles each including a composite core and a shell layer partially covering a surface of the composite core, whereinthe composite core is a composite of a toner core containing a polyester resin and a plurality of resin particles each containing a first resin,the plurality of resin particles each adhere to a surface of the toner core,the shell layer is a film containing a second resin,the first resin has a glass transition point that is 10° C. or more higher than a glass transition point of the second resin,the plurality of resin particles each have a particle diameter that is 1.5 times or more greater than a thickness of the shell layer,an amount of the resin particles is at least 0.3 parts by mass and no greater than 2.0 parts by mass relative to 100 parts by mass of the toner cores, andthe resin particles have a positive zeta potential at pH 4 measured by laser Doppler electrophoresis.2. The electrostatic latent image developing toner according to claim 1 , whereinthe shell layer selectively covers a surface region of the composite core where the resin particles are not present.3. The electrostatic latent image developing toner according to claim 1 , ...

SUSPENSION POLYMERIZATION TONER OF CORE-SHELL STRUCTURE WITH DENSE CHARGES AND PREPARATION METHOD

Suspension polymerization toner of a core-shell structure with dense charges comprises core-shell composite particles prepared by mixing suspension dispersion liquid of toner core particles with shell monomer emulsion and resin-type CCA dispersion liquid, and carrying out a polymerization reaction to form rigid shell layers with dense charges coated on the soft toner core particles. A preparation method thereof comprises: mixing a low-Tg monomer oil phase forming toner core particles with aqueous dispersion liquid, carrying out a heating polymerization reaction after suspension granulation to convert monomer oil droplet particles to polymer particles, and obtaining soft toner core particles; adding a high-Tg shell monomer forming rigid shell layers into water containing a surfactant to form emulsion, adding the emulsion and CCA dispersion liquid into suspension dispersion liquid of the soft toner core particles for second polymerization after mixing, and cleaning, filtering, drying and performing additive treatment. 1. A suspension polymerization toner of core-shell structure with dense charges , comprising core-shell composite particles prepared by mixing suspension dispersion liquid of soft toner core particles with a shell monomer emulsion and resin-type CCA dispersion liquid , and carrying out a polymerization reaction to form a rigid shell layer with dense charges coated on soft toner core particles.2. The suspension polymerization toner of core-shell structure with dense charges of claim 1 , wherein a weight ratio of the rigid shell layer of the core-shell composite particles and the soft core particles is 20:80-1:99; an average thickness of the rigid shell layer is 0.05-0.2 μm; and a coverage ratio of the rigid shell layer on a surface of the soft core particles is greater than 50%.3. The suspension polymerization toner of core-shell structure with dense charges of claim 1 , wherein an average particle diameter of the core-shell composite particles is 5-10 μm ...

METHOD FOR PRODUCING CAPSULE TONER

A method for producing a capsule toner includes preparing core particles; preparing a shell fine particle dispersion liquid having a surface tension of 50 mN/m or more, as measured at 25° C., by dissolving a polyester resin in an organic solvent, thereafter performing neutralization with a neutralizer, and thereafter forming the polyester resin into fine particles; adjusting the surface tension of the shell fine particle dispersion liquid to less than 50 mN/m, as measured at 25° C., by adding a substance that does not include a surfactant to the shell fine particle dispersion liquid; and adhering the shell fine particle dispersion liquid to the surfaces of the core particles. The substance dissolves in or mixes with water and (i) has a vapor pressure equal to or greater than the vapor pressure of water or (ii) has a vapor pressure less than the vapor pressure of water and can be azeotropic with water. 1. A method for producing a capsule toner including core particles and a shell layer formed on surfaces of the core particles , the method comprising:preparing the core particles;preparing a shell fine particle dispersion liquid having a surface tension of 50 mN/m or more, as measured at 25° C., including (i) dissolving a polyester resin in an organic solvent, thereafter (ii) performing neutralization with a neutralizer, and thereafter (iii) forming the polyester resin into fine particles;adjusting the surface tension of the shell fine particle dispersion liquid to less than 50 mN/m, as measured at 25° C., by adding a substance that does not include a surfactant to the shell fine particle dispersion liquid, wherein the substance dissolves in or mixes with water and (i) has a vapor pressure equal to or greater than the vapor pressure of water or (ii) has a vapor pressure less than the vapor pressure of water and can be azeotropic with water; andadhering the shell fine particle dispersion liquid to the surfaces of the core particles.2. The method of claim 1 , wherein the ...

METHOD FOR MANUFACTURING CORE-SHELL STRUCTURE FINE PARTICLES AND TONER

This invention provides a manufacturing method capable of manufacturing core-shall structure particles even when using fine particles manufactured under the conditions of substantially not using a solvent as shell particles and toner containing the fine particles. 2. The method for manufacturing core-shell structure fine particles according to claim 1 , whereinthe shell particles A are manufactured by emulsifying resin for shell in an aqueous medium by applying shearing force to the resin for shell which are warmed to a temperature higher than a softening temperature (Tm) of the resin for shell in the aqueous medium.3. The method for manufacturing core-shell structure fine particles according to claim 1 , whereinthe metal salt is calcium salt or magnesium salt.4. The method for manufacturing core-shell structure fine particles according claim 1 , whereinto the shell particles A, a surfactant containing carboxylic acid or carboxylic acid salt is adsorbed and, to the core particles B, a surfactant containing sulfonic acid salt is adsorbed.5. The method for manufacturing core-shell structure fine particles according to claim 1 , whereina ratio (% by mass) of an addition amount of the shell particles A to an addition amount of the core particles B satisfies the following relationship (4),(4) (Proportion of the addition amount of the shell particles A (% by mass))>[{(Median diameter based on the volume of the shell particles A (μm))/(Median diameter based on the volume of the core particles B (μm))}×400].6. The method for manufacturing core-shell structure fine particles according to claim 1 , whereinthe shell particles A contain resin having an acid value of 3 mgKOH/g or more and 15 mgKOH/g or lower.7. A toner claim 1 , comprising:toner particles; andan external additive,{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the toner particles being manufactured by the method for manufacturing core-shell structure fine particles according to .'} The present invention ...

DEVELOPING AGENT AND METHOD FOR PRODUCING THE SAME

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. 1. (canceled)2. A composition comprising a binder resin , a particle dispersed in the binder resin , and a color developable compound disposed in the particle.3. The composition of claim 2 , wherein the particle comprises a core and a shell encapsulating the core claim 2 , wherein the color developable compound is disposed in the core.4. The composition of claim 2 , wherein the color developable compound is not in contact with the binder resin.5. The composition of claim 2 , wherein the color developable compound is selected from the group consisting of diphenylmethane phthalides claim 2 , phenylindolyl phthalides claim 2 , indolyl phthalides claim 2 , diphenylmethane azaphthalides claim 2 , phenylindolyl azaphthalides claim 2 , fluorans claim 2 , styrynoquinolines claim 2 , diaza-Rhodamine lactone claim 2 , and mixtures thereof.6. The composition of claim 2 , wherein the color developable compound is selected from the group consisting of 3 claim 2 ,3-bis(p-dimethylaminophenyl)-6-dimethylaminophthalide claim 2 , 3-(4-diethylaminophenyl)-3-(1-ethyl-2-methylindol-3-yl)phthalide claim 2 , 3 claim 2 ,3-bis(1-n-butyl-2-methylindol-3-yl)phthalide claim 2 , 3 claim 2 ,3-bis(2-ethoxy-4-diethylaminophenyl)-4-azaphthalide claim 2 , 3-(2-ethoxy-4-diethylaminophenyl)-3-(1-ethyl-2-methylindol-3-yl)-4-azaphthalide claim 2 , 3-[2-ethoxy-4-(N-ethylanilino)phenyl]-3-(1-ethyl-2-methylindol-3-yl)-4-azaphthalide claim 2 , 3 claim 2 , 6-diphenylaminofluoran claim 2 , 3 claim 2 ,6-dimethoxyfluoran claim 2 , 3 claim 2 ,6-di-n-butoxyfluoran claim 2 , 2-methyl-6-(N-ethyl-N-p-tolylamino)fluoran claim 2 , 2-N claim 2 ,N-dibenzylamino-6- ...

TONER PARTICLE, ELECTROPHOTOGRAPHIC TONER, DEVELOPING AGENT, TONER CARTRIDGE AND IMAGE FORMING APPARATUS, AND MANUFACTURE METHOD OF TONER PARTICLE

In accordance with an embodiment, a toner particle comprises two or more glass transition temperatures. Wherein, a first glass transition temperature is within a range from 5 degrees centigrade to 20 degrees centigrade and a second glass transition temperature is within a range from 50 degrees centigrade to 65 degrees centigrade. 1. A toner particle , comprising: a binder resin , a coloring agent , a wax and another compound , whereintwo or more glass transition temperatures exist, anda first glass transition temperature for a core of the toner particle is in a first range from 5 degrees centigrade to equal to or less than 9 degrees centigrade;a second glass transition temperature for a shell of the toner particle is in a second range from 50 degrees centigrade to 65 degrees centigrade, anda difference between the first glass transition temperature and the second glass transition temperature is within a third range from 40 degrees centigrade to 50 degrees centigrade.2. The toner particle according to claim 1 , whereinthe two or more glass transition temperatures only include the first glass transition temperature and the second glass transition temperature.3. The toner particle according to claim 1 , further comprising:a capsule structure constituted by the core and the shell.4. The toner particle according to claim 1 , whereinthe compound comprises at least one of a charge control agent and a cross-linkable material.5. The toner particle according to claim 1 , whereinthe shell binder resin having a thickness in a range from equal to or greater than 0.4 μm to less than 1.8 μm.6. A manufacture method of a toner particle claim 1 , comprising:adding a flocculant in a mixture containing a first binder resin, a coloring agent, a wax and another compound to form a core through aggregating the mixture at a first temperature of more than 20 degrees centigrade;cooling the core to a second temperature smaller than 20 degrees centigrade and adding a flocculant in the core at a ...

IMAGE FORMING METHOD

The present invention relates to an image forming method in which an electrophotographic cartridge is disposed in at least four-color tandem with respect to a transfer material transporting body, in which, in a case where a fixing step side of the transfer material transporting body is set as a downstream side, and a cleaning step side of the transfer material transporting body is set as an upstream side, a total amount of use amount of specific external additives contained in the toner for each of the color electrophotographic cartridges is adjusted to a specific amount, and a specific amount of a specific external additive is used for toner provided in the electrophotographic cartridge on the most downstream side. 1. An image forming method comprising:a developing step of using an electrophotographic cartridge equipped with an electrophotographic photoreceptor and toner for developing an electrostatic charge image, and carrying a toner image on the electrophotographic photoreceptor with an electrostatic latent image;a transfer step of transferring the toner image on the electrophotographic photoreceptor to a transfer material transporting body;a fixing step of fixing the toner image transferred on the transfer material transporting body to a recording medium; anda cleaning step of removing the toner remaining in the transfer step from the surface of the transfer material transporting body by a cleaning member for a transfer material transporting body,wherein the electrophotographic cartridge is disposed in at least four-color tandem with respect to the transfer material transporting body, andin the transfer step, in a case where the fixing step side of the transfer material transporting body is set as a downstream side, and the cleaning step side of the transfer material transporting body is set as an upstream side, and the electrophotographic cartridge disposed in the four-color tandem satisfies the following (A) to (C):(A) each color toner provided in an ...

Toner

There is provided a toner including toner base particles and an external additive in which the external additive is prevented from being buried in the base particles. The toner can maintain a high transfer efficiency over an extended period of use. The toner includes: (1) toner base particles containing a cycloolefin copolymer and a polyethylene; or (2) toner base particles whose surfaces contain a resin having an elastic deformation rate of 70% or more and a melting temperature of 125.0° C. or less.

IMAGE FORMING METHOD AND IMAGE FORMING SYSTEM

An image forming method uses an electrophotographic photoreceptor and a toner for developing an electrostatic charge image. The image forming method has a charging step, an exposure step, a developing step, a transfer step and a cleaning step, wherein the charging step uses a contact charging device; the photoreceptor has a universal hardness value (HU) of 170 N/mmor more, and an elastic deformation ratio of 40% or more when a Vickers indenter is used in a predetermined environment and pushed by a maximum load of 2 mN. The toner for developing an electrostatic charge image contains toner base particles of a core-shell structure having a shell layer of 10% by mass or less with respect to a mass of a toner base particle on an outside of a resin constituting a core particle, and a solubility parameter value (SPs) of a resin constituting the shell layer is 10.75 or less. 1. An image forming method using an electrophotographic photoreceptor and a toner for developing an electrostatic charge image , and having at least a charging step , an exposure step , a developing step , a transfer step and a cleaning step , wherein the charging step is a step using a contact charging device; in an outermost layer of the electrophotographic photoreceptor , a universal hardness value (HU) of the photoreceptor is 170 N/mmor more , and an elastic deformation ratio of the photoreceptor is 40% or more when a Vickers indenter is used in an environment of 25° C. and a relative humidity of 50% and pushed by a maximum load of 2 mN; and the toner for developing an electrostatic charge image contains toner base particles of a core-shell structure having a shell layer of 10% by mass or less with respect to a mass of the toner base particle on an outside of a resin constituting a core particle , and a solubility parameter value (SPs) of a resin constituting the shell layer is 10.75 or less.2. The image forming method described in claim 1 , wherein a glass transition temperature of the resin ...

Polymerized charge enhanced spacer particle

A toner particle has a core and a shell surrounding the core, wherein the shell contains a polymerized charge enhanced spacer particle, which is a copolymer of a charge control agent and a monomer. A method of making toner particles includes forming a slurry by mixing together a first emulsion containing a resin, optionally a wax, optionally a colorant, optionally a surfactant, optionally a coagulant, and one or more additional optional additive, heating the slurry to form aggregated particles in the slurry, forming a second emulsion containing a monomer and a charge control agent, polymerizing the second emulsion to form a copolymer of the monomer and the charge control agent, and incorporating the copolymer into the toner particles, wherein the aggregated particles form a core of the toner particles.

TONER, TONER STORED UNIT, AND IMAGE FORMING APPARATUS

A toner comprising a binder resin and a release agent, wherein the toner has a difference of 30 or less between a maximum value and a minimum value among peak intensities in a range of Molecular weight M±300 where Molecular weight M is a molecular weight selected from a range of from 300 through 5,000 in a molecular weight distribution of tetrahydrofuran (THF)-soluble components in the toner as measured by gel permeation chromatography (GPC), and wherein the peak intensities are defined as relative values assuming a maximum peak value in molecular weights of 20,000 or less is 100, in a molecular weight distribution curve taking an intensity as a vertical axis and a molecular weight as a horizontal axis as measured by GPC. 1. A toner comprising:a binder resin; anda release agent,wherein the toner has a difference of 30 or less between a maximum value and a minimum value among peak intensities in a range of Molecular weight M±300 where Molecular weight M is a molecular weight selected from a range of from 300 through 5,000 in a molecular weight distribution of tetrahydrofuran (THF)-soluble components in the toner as measured by gel permeation chromatography (GPC), andwherein the peak intensities are defined as relative values assuming a maximum peak value in molecular weights of 20,000 or less is 100, in a molecular weight distribution curve taking an intensity as a vertical axis and a molecular weight as a horizontal axis as measured by GPC.2. The toner according to claim 1 , wherein a toner extract obtained by drying an extraction liquid obtained through Soxhlet extraction of the toner with THF has glass transition temperature Tg in a range of from 40° C. through 60° C. claim 1 , and claim 1 , in a molecular weight distribution of the toner extract as measured by GPC claim 1 , has a weight average molecular weight Mw in a range from 3 claim 1 ,000 through 10 claim 1 ,000 and a ratio of the weight average molecular weight (Mw) to a number average molecular weight (Mn ...

ELECTROSTATIC LATENT IMAGE DEVELOPING TONER

An electrostatic latent image developing toner includes toner particles each including a toner core and a shell layer disposed over a surface of the toner core. The shell layer includes a plurality of first domains (R) and a second domain (R) that is present at least among the first domains (R). The first domains (R) are each substantially formed from a first thermoplastic resin. The second domain (R) is substantially formed from a second thermoplastic resin. The second thermoplastic resin is more hydrophobic than the first thermoplastic resin. The first thermoplastic resin includes at least one specific repeating unit having at least one group selected from the group consisting of a hydroxyl group, an amino group, and an amide group. A proportion of the at least one repeating unit among all repeating units included in the first thermoplastic resin is at least 0.5 mol % and no greater than 50 mol %. 1. An electrostatic latent image developing toner comprising a plurality of toner particles each including a core and a shell layer disposed over a surface of the core , whereinthe shell layer includes a plurality of first domains and a second domain that is present at least among the plurality of first domains,the plurality of first domains are each substantially formed from a first thermoplastic resin,the second domain is substantially formed from a second thermoplastic resin that is more hydrophobic than the first thermoplastic resin,the first thermoplastic resin includes at least one specific repeating unit having at least one group selected from the group consisting of a hydroxyl group, an amino group, and an amide group, anda proportion of the at least one specific repeating unit among all repeating units included in the first thermoplastic resin is at least 0.5 mol % and no greater than 50 mol %.2. The electrostatic latent image developing toner according to claim 1 , whereinthe shell layer has sea-and-island structure in which the plurality of first domains are ...

TONER AND METHOD FOR PRODUCING TONER

The toner comprising a toner particle having a core-shell structure that contains a core containing an amorphous resin A and a crystalline resin and a shell containing an amorphous resin B, wherein the amorphous resin A contains a styrene-acrylic resin, the content of the styrene-acrylic resin is at least 50% by mass based on the total mass of the amorphous resin A, a degree of compatibility A between the amorphous resin A and the crystalline resin is at least 50% and not more than 100%, and a degree of compatibility B between the amorphous resin B and the crystalline resin is at least 0% and not more than 40%. 2. The toner according to claim 1 , wherein the crystalline resin is a block polymer in which a crystalline polyester segment is bonded to an amorphous vinyl polymer segment.3. The toner according to claim 2 , wherein a mass ratio of the crystalline polyester segment to the amorphous vinyl polymer segment is at least 30/70 and not more than 70/30. Field of the InventionThe present invention relates to a toner used to form a toner image through the development of an electrostatic latent image that has been formed by a method such as electrophotography, electrostatic recording, and toner jet recording systems. The present invention further relates to a method for producing a toner.Description of the Related ArtLower energy consumption and improved toner performance have been required of printers and copiers in recent years. Specifically, there is demand to bring about toner softening at lower temperatures, but this cannot be achieved with an approach that simply causes toner softening due to the necessity at the same time to maintain the high-temperature storability. Toner that incorporates a crystalline resin has been investigated to respond to this problem. Crystalline resin has little effect on the high-temperature storability of toner because it is crystallized at room temperature, and can bring about toner softening due to a viscosity drop upon melting. ...

Electrostatic charge image developing toner

An electrostatic charge image developing toner includes a toner core including at least a binder resin and a shell layer configured to cover the toner core. The shell layer includes an inner layer and an outer layer. A difference obtained by subtracting a SP value of a material for the inner layer from a SP value of the binder resin, ΔSP 1 , is 0.3 or larger and 1.4 or lower. A difference obtained by subtracting a SP value of a material for the outer layer from the SP value of the material for the inner layer, ΔSP 2 , is 0.5 or larger and 1.6 or lower. The ΔSP 1 is below the ΔSP 2 .

ELECTROSTATIC LATENT IMAGE DEVELOPING TONER, METHOD FOR MANUFACTURING ELECTROSTATIC LATENT IMAGE DEVELOPING TONER, AND METHOD FOR FIXING ELECTROSTATIC LATENT IMAGE DEVELOPING TONER

An electrostatic latent image developing toner includes toner particles. Each toner particle includes a toner core containing a binder resin, a shell layer coating a surface of the toner core, and needle-like inorganic particulates. Each shell layer contains a thermosetting resin, and the inorganic particulates are present within the shell layer. The inorganic particulates have: an aspect ratio of 1.25 or more and 2.5 or less; and an average major diameter and an average minor diameter of 300 nm or less. 1. An electrostatic latent image developing toner comprising toner particles , wherein a toner core containing a binder resin,', 'a shell layer coating a surface of the toner core, and', 'needle-like inorganic particulates, wherein, 'each toner particle includes'}each shell layer contains a thermosetting resin, and the inorganic particulates are present within the shell layer, and an aspect ratio of 1.25 or more and 2.5 or less, and', 'an average major diameter and an average minor diameter of 300 nm or less., 'the inorganic particulates have'}2. An electrostatic latent image developing toner according to claim 1 , whereina content of the inorganic particulates in the toner particles is 0.1% by mass or more and 5.0% by mass or less with respect to a total amount of the toner particles.3. An electrostatic latent image developing toner according to claim 1 , whereinthe inorganic particulates are titanium oxide particulates.4. An electrostatic latent image developing toner according to claim 1 , whereinthe thermosetting resin is a melamine resin or a urea resin.5. A method for manufacturing an electrostatic latent image developing toner claim 1 , comprising:preparing toner cores containing a binder resin; andforming shell layers to coat surfaces of the respective toner cores, whereinthe shell layers contain a thermosetting resin, and an aspect ratio of 1.25 or more and 2.5 or less, and', 'an average major diameter and an average minor diameter of 300 nm or less., ' ...

Toner

A toner is prepared by wet granulation methods, including a monoester wax having carbon atoms of from 36 to 46 on average as a release agent. The toner has a DSC endothermic energy amount (ΔH1) originating from the wax of from 10 to 12 mJ/mg and a DSC endothermic energy amount (ΔH2) originating from the wax of from 0.6 to 0.9 times as much as ΔH1 after a part of the wax is separated by hexane extraction from the toner. The hexane extraction includes mixing 1 g of the toner in 7 ml of n-hexane to prepare a mixture; stirring the mixture at 120 rpm for 1 min by a pot mill to prepare a dispersion; and subjecting the dispersion to suction filtration.

EMULSION AGGREGATION TONER FOR SENSOR AND ANTIBACTERIAL APPLICATIONS

Provided is a toner that has a plurality of toner particles. Each toner particle can include a binder resin core and a shell disposed about the binder resin core. The binder resin core can include at least one binder resin. The shell can include a plurality of metal nanoparticles. The binder resin core can be prepared by forming an aggregate of the binder resin in which metallic nanoparticles are not present. 1. A toner comprising a plurality of toner particles , each toner particle comprising:a binder resin core comprising at least one binder resin; anda shell disposed about the binder resin core, the shell comprising a plurality of metal nanoparticles, 'forming an aggregate of the binder resin in which metallic nanoparticles are not present.', 'wherein the binder resin core is prepared by a method comprising2. The toner of claim 1 , wherein the binder resin is selected from the group consisting of styrene resins claim 1 , acryl resins claim 1 , vinyl resins claim 1 , polyether polyol resins claim 1 , phenol resins claim 1 , silicon resins claim 1 , polyester resins claim 1 , epoxy resins claim 1 , polyamide resins claim 1 , polyurethane resins claim 1 , and polybutadiene resins.3. The toner of claim 1 , wherein each metal nanoparticle comprises at least one metal selected from the group consisting of silver (Ag) claim 1 , gold (Au) claim 1 , platinum (Pt) claim 1 , palladium (Pd) claim 1 , iron (Fe) claim 1 , nickel (Ni) claim 1 , aluminum (Al) claim 1 , antimony (Sb) claim 1 , tungsten (W) claim 1 , terbium (Tb) claim 1 , dysprosium (Dy) claim 1 , gadolinium (Gd) claim 1 , europium (Eu) claim 1 , neodymium (Nd) claim 1 , praseodymium (Pr) claim 1 , strontium (Sr) claim 1 , magnesium (Mg) claim 1 , copper (Cu) claim 1 , zinc (Zn) claim 1 , cobalt (Co) claim 1 , manganese (Mn) claim 1 , chromium (Cr) claim 1 , vanadium (V) claim 1 , molybdenum (Mo) claim 1 , zirconium (Zr) claim 1 , and barium (Ba).4. The toner of claim 1 , wherein each metal nanoparticle comprises ...

Polymer-Encapsulated Carbon Nanotube: Process for Its Preparation and Use Thereof

A process for preparing a polymer-encapsulated carbon nanotube material is described. The process comprises a suspension polymerization process involving a carbon nanotube material. The process can also involve a charge control agent. The polymer-encapsulated carbon nanotube material has particles size in the micron range. The material can be used in toner applications. 1. A process for preparing a toner material , wherein the process comprises a suspension polymerization process involving a carbon nanotube material and a charge control agent that is free of any chemical group which reacts with radicals , wherein the charge control agent is at a concentration of about 0.01 to 0.03 wt % relative to the suspension polymerization mixture.2. (canceled)3. (canceled)4. The process according to claim 1 , wherein the charge control agent is free of any carbonyl group or thiocarbonyl group.5. The process according to claim 1 , wherein the charge control agent is modified with boron.6. (canceled)7. A process for preparing a polymer-encapsulated carbon nanotube material claim 1 , comprising:(a) preparing a first mixture or dispersed phase comprising monomers of at least one type, a cross-linker, an initiator and a charge control agent;(b) preparing a second mixture or continuous phase comprising a polymeric alcohol, a stabilizer and a carbon nanotube material; and(c) mixing the dispersed phase with the continuous phase to obtain a suspension polymerization mixture which leads to the polymer-encapsulated carbon nanotube material.8. The process according to claim 7 , wherein step (a) comprises a step of adding the charge control agent to a mixture comprising the monomers claim 7 , the cross-linker and the initiator.9. The process according to claim 7 , wherein step (b) comprises heating to a temperature of about 50 to 90° C.10. The process according to claim 7 , wherein step (c) comprises adding the dispersed phase to the continuous phase claim 7 , drop by drop claim 7 , under ...

TONER FORMULATION INCLUDING A SOFTENING AGENT AND METHOD OF PREPARING THE SAME

A chemically prepared core shell toner formulation for use in electrophotography having an inventive softening agent consisting of a core shell latex having an encapsulated interpenetrating polymer network microgel in the core of the toner is disclosed. Having this core shell latex with an encapsulated IPN microgel in the core of the toner results in a toner that can simultaneously fuse at a desirable low temperature and survive the temperature extremes associated with shipping and storage. 1. A chemically prepared toner , comprising:a core including a first polymer binder, a synthetic core shell latex containing an encapsulated interpenetrating polymer network microgel, a pigment, and a wax; anda shell formed around the core including a second polymer binder, wherein the encapsulated interpenetrating polymer network microgel includes a first acrylate polymer network and a second polymer network having a self-crosslinkable non water soluble silicon oil.2. The chemically prepared toner of claim 1 , wherein the synthetic core shell latex includes a hydrophilic monomer having carboxyl (—COOH) and hydroxy (—OH) functional groups and a hydrophobic monomer having styrene and acrylate functionality.3. The chemically prepared toner of claim 2 , wherein the hydrophobic monomer having acrylate functionality is an alkyl acrylate.4. The chemically prepared toner of claim 3 , wherein the alkyl acrylate monomer is lauryl acrylate.5. The chemically prepared toner of claim 2 , wherein the hydrophilic monomers having carboxyl (—COOH) and hydroxy (—OH) functional groups are hydroxyethyl methacrylate and beta-carboxyethyl acrylate.6. (canceled)7. (canceled)8. The chemically prepared toner of claim 1 , wherein the self-crosslinkable non water soluble silicon oil is selected from the group consisting of monomethoxysilane claim 1 , dimethoxysilane claim 1 , trimethoxysilane claim 1 , octyltrimethoxysilane claim 1 , octadecyltrimethoxysilane claim 1 , monoethoxysilane claim 1 , ...

TONER FORMULATION INCLUDING A SOFTENING AGENT AND METHOD OF PREPARING THE SAME

A method for producing core shell toner particles wherein the toner core includes a unique softening agent consisting of a core shell styrene acrylic latex having an encapsulated IPN microgel. A first polymer emulsion is combined and agglomerated with a pigment dispersion and a wax emulsion and the above described styrene acrylic latex having an encapsulated IPN microgel to form toner cores. A second polymer emulsion is combined and agglomerated with the toner cores to form toner shells around the toner cores. The toner cores and toner shells are then fused to form toner particles. 1. A method of producing toner comprising:combining and agglomerating a first polymer emulsion with a pigment dispersion, a wax emulsion and a synthetic core shell latex having an encapsulated interpenetrating polymer network microgel to form toner cores;combining and agglomerating a second polymer emulsion with the toner cores to form toner shells around the toner cores; andfusing the aggregated toner cores and toner shells to form toner particles having a core shell structure, wherein the encapsulated interpenetrating polymer network microgel is formed by the encapsulation of a self-crosslinkable, non-water soluble oil in the synthetic core shell latex.2. The method of producing toner of claim 1 , wherein the synthetic core shell latex includes a hydrophilic monomer having carboxyl (—COOH) and hydroxy (—OH) functional groups and a hydrophobic monomer having styrene and acrylate functionality.3. The method of producing toner of claim 2 , wherein the hydrophobic monomer having acrylate functionality is an alkyl acrylate.4. The method of producing toner of claim 3 , wherein the alkyl acrylate monomer is lauryl acrylate.5. The method of producing toner of claim 2 , wherein the hydrophilic monomers having carboxyl (—COOH) and hydroxy (—OH) functional groups are hydroxyethyl methacrylate and beta-carboxyethyl acrylate.6. (canceled)7. The method of producing toner of claim 1 , wherein the self ...

TWO-COMPONENT DEVELOPER

A two-component developer includes a toner and a carrier. The toner is a positively chargeable toner that is positively charged by friction with the carrier. The toner includes a plurality of toner particles each including a toner mother particle and a plurality of first resin particles. An anionic surfactant having higher negative chargeability than the first resin particles is present on surfaces of the first resin particles. The carrier includes a plurality of carrier particles each including a carrier mother particle and a plurality of second resin particles. A cationic surfactant having higher positive chargeability than the second resin particles is present on surfaces of the second resin particles. The first resin particles have a zeta potential lower than 0 mV at a pH of 5. The second resin particles have a zeta potential higher than 0 mV at a pH of 5. 1. A two-component developer comprising a toner and a carrier , whereinthe toner is a positively chargeable toner that is positively charged by friction with the carrier,the toner includes a plurality of toner particles each including a toner mother particle and a plurality of first resin particles attached to a surface of the toner mother particle,an anionic surfactant having higher negative chargeability than the first resin particles is present on surfaces of the first resin particles,the carrier includes a plurality of carrier particles each including a carrier mother particle and a plurality of second resin particles attached to a surface of the carrier mother particle,a cationic surfactant having higher positive chargeability than the second resin particles is present on surfaces of the second resin particles,the first resin particles has a zeta potential lower than 0 mV at a pH of 5, andthe second resin particles has a zeta potential higher than 0 mV at a pH of 5.2. The two-component developer according to claim 1 , whereinthe first resin particles has a zeta potential of at least −30.0 mV and no ...

Positively chargeable toner and two-component developer

A positively chargeable toner includes a plurality of toner particles each including a toner mother particle and an external additive attached to a surface of the toner mother particle. The external additive includes first resin particles each having a surface to which a cationic surfactant is attached and second resin particles each having a surface to which a cationic surfactant is attached. The first resin particles have a hydrophobicity of at least 15% and no greater than 30%. The second resin particles have a hydrophobicity of at least 50% and no greater than 80%. A first resin particle coverage ratio and a second resin particle coverage ratio each are at least 10% and no greater than 30%. Each blocking rate of the first resin particles and the second resin particles is no greater than 30% by mass.

ELECTROSTATIC LATENT IMAGE DEVELOPING TONER

An electrostatic latent image developing toner includes toner particles each including a toner core and a shell layer. The shell layer includes first and second domains. The first domain includes a first copolymer of a first main monomer having a mole fraction of at least 20 mol % and one or more first additional monomers each having a mole fraction of less than 20 mol %. The second domain includes a second copolymer of a second main monomer having a mole fraction of at least 20 mol % and one or more second additional monomers each having a mole fraction of less than 20 mol %. A difference in polymer SP value between the first and second main monomers is at least 0.5 and no greater than 5.0. The first and second additional monomers each include one or more common monomers having a homopolymerization glass transition point of no greater than −20° C. 1. An electrostatic latent image developing toner comprising a plurality of toner particles each including a core and a shell layer disposed over a surface of the core , whereinthe shell layer has a first domain and a second domain,the first domain includes a first copolymer of one or more first main monomers and one or more first additional monomers, the one or more first main monomers each being a monomer having a mole fraction of at least 20 mol %, the one or more first additional monomers each being a monomer having a mole fraction of less than 20 mol %,the second domain includes a second copolymer of one or more second main monomers and one or more second additional monomers, the one or more second main monomers each being a monomer having a mole fraction of at least 20 mol %, the one or more second additional monomers each being a monomer having a mole fraction of less than 20 mol %,a difference in polymer SP value between the one or more first main monomers and the one or more second main monomers calculated according to Fedors' method is at least 0.5 and no greater than 5.0, andthe one or more first additional ...

Electrostatic latent image developing toner and method for producing the same

An electrostatic latent image developing toner includes toner particles each including a toner core containing a binder resin and a shell layer on a surface of the toner core. The shell layer includes a unit derived from a monomer of a thermosetting resin. The thermosetting resin is one or more resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin. The inorganic particles intervene in an interface between the toner core and the shell layer. The inorganic particles have a number average particle diameter of 60 nm or more and 250 nm or less. Protrusions having a shape that follows a shape of the inorganic particles are on surfaces of the toner particles.

TONER AND METHOD FOR MANUFACTURING THE SAME

A toner includes a plurality of toner particles each having a core and a shell layer on a surface of the core. In a cross section of the toner particle analyzed by EELS, for at least 50% of a circumferential length of the core, the shell layer has one or more portions each satisfying conditions that: a ratio of INc to INs is no less than 0.0 and no greater than 0.2; and a thickness of the shell layer is at least 5 nm. Here, INs indicates an intensity of an N-K shell absorption-edge originating from nitrogen atoms in the shell layer, and INc indicates an intensity of an N-K shell absorption-edge originating from nitrogen atoms in the core. In addition, the longest length among the one or more portions of the shell layer each satisfying the conditions is at least 100 nm. 1. A toner comprising: a core, and', 'a shell layer on a surface of the core, wherein, 'a plurality of toner particles each having'}in a cross section of the toner particle analyzed by EELS, a ratio of INc to INs is no less than 0.0 and no greater than 0.2, and', 'a thickness of the shell layer is at least 5 nm, and, 'for at least 50% of a circumferential length of the core, the shell layer has one or more portions each satisfying conditions that'}a longest length among the one or more portions of the shell layer each satisfying the conditions is at least 100 nm,whereINs indicates an intensity of an N-K shell absorption-edge originating from nitrogen atoms in the shell layer, andINc indicates an intensity of an N-K shell absorption-edge originating from nitrogen atoms in the core.2. A toner according to claim 1 , whereina greatest thickness among the one or more portions of the shell layer each satisfying the conditions is no less than 5 nm and no greater than 15 nm.3. A toner according to claim 1 , whereinfor no less than 65% and no greater than 86% of the circumferential length of the core, the shell layer has the one or more portions each satisfying the conditions, anda longest length among the one ...

ELECTROSTATIC LATENT IMAGE DEVELOPING TONER AND MANUFACTURING METHOD OF THE SAME

An electrostatic latent image developing toner includes toner particles that each include a toner mother particle. The toner mother particle includes a toner core, a shell layer disposed over a surface of the toner core, and inorganic particles. The inorganic particles are located at an interface between the toner core and the shell layer, or within the shell layer. The shell layer contains a thermosetting component. The toner mother particle has a BET specific surface area of at least 0.95 m/g. 1. An electrostatic latent image developing toner comprisingtoner particles that each include a toner mother particle, whereinthe toner mother particle includes a toner core, a shell layer disposed over a surface of the toner core, and inorganic particles,the inorganic particles are located at an interface between the toner core and the shell layer, or within the shell layer,the shell layer contains a thermosetting component, and{'sup': '2', 'the toner mother particle has a BET specific surface area of at least 0.95 m/g.'}2. The electrostatic latent image developing toner according to claim 1 , whereineach of the toner particles further includes one or more types of inorganic particles, including at least silica, located on a surface of the toner mother particle.3. The electrostatic latent image developing toner according to claim 1 , whereinthe shell layer has a thickness of no greater than 15 nm.4. The electrostatic latent image developing toner according to claim 1 , whereina surfactant is not present between the toner core and the shell layer.5. The electrostatic latent image developing toner according to claim 1 , wherein{'sup': '2', 'the toner mother particle has a BET specific surface area of at least 0.97 m/g.'}6. The electrostatic latent image developing toner according to claim 1 , whereinthe toner particles have a volume average particle size of at least 4.0 μm and no greater than 10.0 μm.7. The electrostatic latent image developing toner according to claim 1 , ...

ELECTROSTATIC LATENT IMAGE DEVELOPING TONER

An electrostatic latent image developing toner contains a plurality of toner particles each including a toner core and a shell layer disposed over a surface of the toner core. The shell layer has at least one first domain having a film shape and a plurality of second domains each having a particle shape. The first domain is formed substantially from a non-crosslinked resin. The second domains are formed substantially from a crosslinked resin. The crosslinked resin has a glass transition point 45° C. or more greater than the non-crosslinked resin. The first domain has an average height from the surface of the toner core of at least 10 nm and less than 50 nm. The second domains have an average height from the surface of the toner core of at least 50 nm and no greater than 100 nm. 1. An electrostatic latent image developing toner comprising a plurality of toner particles each including a core and a shell layer disposed over a surface of the core , whereinthe shell layer has at least one first domain having a film shape and a plurality of second domains each having a particle shape,the first domain is formed substantially from a non-crosslinked resin,the second domains are formed substantially from a crosslinked resin,the crosslinked resin has a glass transition point 45° C. or more greater than the non-crosslinked resin,the first domain has an average height from the surface of the core of at least 10 nm and less than 50 nm, andthe second domains have an average height from the surface of the core of at least 50 nm and no greater than 100 nm.2. The electrostatic latent image developing toner according to claim 1 , whereina ratio of a region of the core covered with the first domain relative to an entire surface region of the core is at least 40% and no greater than 80%.3. The electrostatic latent image developing toner according to claim 2 , whereinthe first domain and the second domains are stacked in order of the first domain and the second domains from a side close ...

ELECTROSTATIC LATENT IMAGE DEVELOPING TONER

An electrostatic latent image developing toner includes toner particles each including a core and a shell layer disposed over a surface of the core. The shell layer contains first resin particles having a number average particle diameter of 60 nm to 100 nm and second resin particles having a number average particle diameter of 10 nm to 50 nm. A particle diameter difference obtained by subtracting the number average particle diameter of the second resin particles from the number average particle diameter of the first resin particles is +20 nm to +50 nm. The first resin particles contain a charge control agent. The first resin particles have a higher softening point than the second resin particles. A ratio of a mass of the first resin particles to a sum of the mass of the first resin particles and a mass of the second resin particles is 0.7 to 0.9. 1. An electrostatic latent image developing toner comprising a plurality of toner particles each including a core and a shell layer disposed over a surface of the core , whereinthe shell layer contains first resin particles having a number average particle diameter of at least 60 nm and no greater than 100 nm, and second resin particles having a number average particle diameter of at least 10 nm and no greater than 50 nm,a particle diameter difference obtained by subtracting the number average particle diameter of the second resin particles from the number average particle diameter of the first resin particles is at least +20 nm and no greater than +50 nm,the first resin particles contain a charge control agent,the first resin particles have a higher softening point than a softening point of the second resin particles, anda ratio of a mass of the first resin particles to a sum of the mass of the first resin particles and a mass of the second resin particles is at least 0.7 and no greater than 0.9.2. The electrostatic latent image developing toner according to claim 1 , whereinthe core contains a polyester resin, and the ...

High Visibility Fluorescent Yellow Toner And Toner Process

A fluorescent yellow toner including a core comprising a first solvent yellow 160-incorporated amorphous polyester; a second solvent yellow 160-incorporated amorphous polyester; wherein the first amorphous polyester and the second amorphous polyester are different; and a crystalline polyester; a shell disposed over the core, the shell comprising at least one amorphous polyester; wherein the toner provides printed images having an L* value of greater than 90, an a* value of from about less than −40 to about −20, and a b*value of greater than 75. A process of printing the fluorescent yellow toner. 1. A fluorescent yellow toner comprising:a core comprising a first solvent yellow 160-incorporated amorphous polyester; a second solvent yellow 160-incorporated amorphous polyester; wherein the first amorphous polyester and the second amorphous polyester are different; and a crystalline polyester;a shell disposed over the core, the shell comprising at least one amorphous polyester;wherein the toner provides printed images having an L* value of greater than 90, an a* value of from about less than −40 to about −20, and a b*value of greater than 75.2. The fluorescent yellow toner of claim 1 , wherein the first solvent yellow 160-incorporated amorphous polyester is a poly(propoxylated bisphenol-co-terephthalate-fumarate-dodecenylsuccinate) and the second solvent yellow 160-incorporated amorphous polyester is a poly(propoxylated-ethoxylated bisphenol-co-terephthalate-dodecenylsuccinate-trimellitic anhydride).4. The fluorescent yellow toner of claim 1 , wherein the crystalline polyester is a poly(1 claim 1 ,6-hexylene-1 claim 1 ,12-dodecanoate).5. The fluorescent yellow toner of claim 1 , wherein the core further comprises a third amorphous polyester and a fourth amorphous polyester;wherein the third amorphous polyester is not incorporated with solvent yellow 160;wherein the fourth amorphous polyester is not incorporated with solvent yellow 160; andwherein the third amorphous ...

ELECTROSTATIC LATENT IMAGE DEVELOPING TONER AND PRODUCTION METHOD OF THE SAME

An electrostatic latent image developing toner includes a plurality of toner particles each including a toner core and a shell layer covering a surface of the toner core. The shell layer contains a hydrophobic thermoplastic resin and a positively chargeable hydrophilic water-insoluble resin. An existing amount A of alkali metal elements present in a surface layer of the shell layer measured by X-ray photoelectron spectroscopy and an existing amount B of alkali metal elements present in a toner particle as a whole measured by fluorescent X-ray analysis satisfy expressions (a) and (b) shown below 1. An electrostatic latent image developing toner comprisinga plurality of toner particles each including a toner core and a shell layer covering a surface of the toner core, whereinthe shell layer contains a hydrophobic thermoplastic resin and a positively chargeable hydrophilic water-insoluble resin, and [{'br': None, 'A≤300 ppm \u2003\u2003(a)'}, {'br': None, 'i': 'A/B<', '0.5≤1.0 \u2003\u2003(b).'}], 'an existing amount A of alkali metal elements present in a surface layer of the shell layer measured by X-ray photoelectron spectroscopy and an existing amount B of alkali metal elements present in each of the toner particles as a whole measured by fluorescent X-ray analysis satisfy expressions (a) and (b) shown below'}2. The electrostatic latent image developing toner according to claim 1 , wherein {'br': None, 'i': 'A<', '230 ppm<300 ppm \u2003\u2003(c).'}, 'the existing amount A satisfies an expression (c) shown below'}3. The electrostatic latent image developing toner according to claim 1 , wherein {'br': None, 'i': 'A<', '180 ppm<230 ppm \u2003\u2003(d).'}, 'the existing amount A satisfies an expression (d) shown below'}4. The electrostatic latent image developing toner according to claim 3 , wherein {'br': None, 'i': 'A/B<', '0.8<0.9 \u2003\u2003(e).'}, 'the existing amount A and the existing amount B satisfy an expression (e) shown below'}5. The electrostatic latent ...

POSITIVELY CHARGEABLE TONER

A positively chargeable toner includes a plurality of toner particles. The toner particles each include a toner mother particle and an external additive. The toner mother particle includes a toner core containing a binder resin and a shell layer covering a surface of the toner core. The external additive includes a plurality of silica particles. The silica particles are each present on a surface of the shell layer and include a silica base having a surface treated with a surface treatment agent. The surface treatment agent includes a first treatment agent having a carboxyl group in a molecule thereof. The toner core and each of the silica particles is bonded to each other through a specific covalent bond. An amount of ring-unopened oxazoline groups included in 1 g of the positively chargeable toner as measured by gas chromatography-mass spectrometry is at least 0.10 μmol and no greater than 100 μmol. 2. The positively chargeable toner according to claim 1 , whereinthe silica particles has a hydrophobicity of at least 60%.3. The positively chargeable toner according to claim 2 , whereinthe surface treatment agent further includes a second treatment agent, andthe second treatment agent is a hydrophobizing agent.4. The positively chargeable toner according to claim 3 , whereinthe first treatment agent is a reactive silicone oil having a carboxyl group in a molecule thereof, andthe second treatment agent is an alkoxysilane having an alkyl group in a molecule thereof.5. The positively chargeable toner according to claim 4 , whereinthe surface treatment agent further includes a third treatment agent, andthe third treatment agent is an alkoxysilane having an amino group in a molecule thereof.6. The positively chargeable toner according to claim 1 , whereinthe binder resin includes at least one resin having an acid value of at least 5 mgKOH/g and no greater than 50 mgKOH/g. The present application claims priority under 35 U.S.C. § 119 to Japanese Patent Application No. 2017 ...

Toner Comprising Colorant Wax Dispersion

A toner including a resin; and a colorant wax comprising a plurality of colorant wax particles comprising a colorant core surrounded by a wax shell, wherein the colorant wax particles exhibit a particle size distribution of from about 150 nanometers to less than about 300 nanometers; and wherein the colorant wax is prepared by (a) melting and mixing a dry colorant with at least one wax to form a colorant concentrate, wherein the colorant concentrate contains at least 25 percent by weight of colorant; (b) milling the colorant concentrate of step (a) to form a milled colorant concentrate; (c) combining the milled colorant concentrate of (b) with water and dispersing to form the plurality of colorant wax particles; wherein the melting and mixing of step (a) and the milling of step (b) is done in an immersion media mill; and wherein the combining of step (c) is done using a piston homogenizer. 1. A toner process comprising:contacting a resin and a colorant wax comprising a plurality of colorant wax particles comprising a colorant core surrounded by a wax shell, wherein the colorant wax particles exhibit a particle size distribution of from about 150 nanometers to less than about 300 nanometers; and wherein the colorant wax is prepared by (a) melting and mixing a dry colorant with at least one wax to form a colorant concentrate, wherein the colorant concentrate contains at least 25 percent by weight of colorant; (b) milling the colorant concentrate of step (a) to form a milled colorant concentrate; (c) combining the milled colorant concentrate of (b) with water and dispersing to form the plurality of colorant wax particles to form a blend;wherein the melting and mixing of step (a) and the milling of step (b) is done in an immersion media mill; andwherein the combining of step (c) is done using a piston homogenizer;optionally, with an aggregating agent, heating the blend at a temperature near the glass transition temperature of the resin to form aggregated toner particles ...

TONER FORMULATION USING WAX ENCAPSULATED WITH A STYRENE ACRYLATE LATEX FORMULATION AND METHOD OF PREPARING THE SAME

The present disclosure relates to a chemically prepared toner composition including a toner particle having a core including a first polymer binder, an styrene acrylate encapsulated wax latex, a pigment, and a shell formed around the core including a second polymer binder and method to make the same. The disclosed method of preparing the toner results in a change in the distribution of the components of the toner particle wherein the lower molecular weight resins, the pigment, and the wax are located away from the surface of the toner particle and the pigment is clinging to the edge of the wax domain. 1. A method of producing toner comprising: (a) preparing a wax dispersion;', '(b) preparing a monomer solution;', '(c) seeding the wax dispersion with a portion of the monomer solution;', '(d) preparing an initiator solution; and', 'to the seeded wax dispersion, wherein a monomer encapsulated wax latex is formed;', '(e) adding the initiator solution and a remaining portion of the monomer solution'}, 'preparing a first polymer emulsion;', 'preparing a second polymer emulsion;', 'preparing a pigment dispersion;', 'combining and agglomerating the first polymer emulsion with the pigment dispersion and the monomer encapsulated wax latex to form toner cores;', 'combining and agglomerating the second polymer emulsion with the toner cores to form toner shells around the toner cores; and', 'fusing the aggregated toner cores and toner shells to form toner particles., 'preparing a latex to encapsulate a wax, the preparing of the latex including the steps of2. The method of claim 1 , wherein the monomer solution includes a hydrophilic monomer having carboxyl (—COOH) and hydroxy (—OH) functional groups and a hydrophobic monomer having styrene and acrylate functionality.3. The method of claim 2 , wherein the hydrophobic monomer having acrylate functionality is an alkyl acrylate.4. The method of claim 3 , wherein the alkyl acrylate monomer is butyl acrylate.5. The method of claim 3 , ...

TONER FORMULATION USING CRYSTALLINE POLYESTER ENCAPSULATED WITH A STYRENE ACRYLATE LATEX FORMULATION AND METHOD OF PREPARING THE SAME

The present disclosure relates to a chemically prepared toner composition including a toner particle having a core including a first polymer binder, an styrene acrylic encapsulated crystalline polyester latex, a pigment, a wax, and a shell formed around the core including a second polymer binder and method to make the same. The disclosed method of preparing the toner results in a change in the distribution of the components of the toner particle wherein the lower molecular weight resins, the pigment, and the wax are located away from the surface of the toner particle. 1. A method of producing toner comprising:preparing a latex to encapsulate a crystalline polyester, the preparing of the latex including the steps of:(a) preparing a crystalline polyester dispersion;(b) preparing a monomer solution;(c) seeding the crystalline polyester dispersion with a portion of the monomer solution;(d) preparing an initiator solution; and(e) adding the initiator solution and a remaining portion of the monomer solution to the seeded crystalline polyester dispersion, wherein a polymer encapsulated crystalline polyester latex is formed;preparing a first polymer emulsion;preparing a second polymer emulsion;preparing a wax emulsion;preparing a pigment dispersion;combining and agglomerating the first polymer emulsion with the pigment dispersion, wax emulsion and the monomer encapsulated crystalline polyester latex to form toner cores;combining and agglomerating the second polymer emulsion with the toner cores to form toner shells around the toner cores; andfusing the aggregated toner cores and toner shells to form toner particles,wherein the monomer solution includes a hydrophilic monomer having one of a carboxyl (—COOH) functional group and a hydroxy (—OH) functional group and a hydrophobic monomer having styrene and acrylate functionality, and wherein the hydrophilic monomer having having one of a carboxyl (—COOH) functional group and a hydroxy (—OH) functional group is at least one of ...

ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER AND METHOD FOR PRODUCING ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER

An electrostatic charge image developing toner contains a plurality of toner particles. Each of the toner particles includes a toner core containing a binder resin and a shell layer coating the toner core. The shell layers contain a thermosetting resin. The toner cores have a negative zeta potential in an aqueous medium adjusted to pH 4. The toner particles have a positive zeta potential in an aqueous medium adjusted to pH 4. The shell layers have a film thickness of 1 nm or more and 20 nm or less. 1. An electrostatic charge image developing toner containing a plurality of toner particles ,the toner particles each including a toner core containing a binder resin and a shell layer coating the toner core,the shell layers containing a thermosetting resin,the toner cores having a negative zeta potential in an aqueous medium adjusted to pH 4,the toner particles having a positive zeta potential in an aqueous medium adjusted to pH 4,the shell layers having a film thickness of 1 nm or more and 20 nm or less.2. An electrostatic charge image developing toner according to claim 1 , whereinthe binder resin has a glass transition point equal to or lower than a cure onset temperature of the thermosetting resin contained in the shell layers.3. An electrostatic charge image developing toner according to claim 1 , whereinthe toner cores have a glass transition point of 25° C. or higher and 55° C. or lower.4. An electrostatic charge image developing toner according to claim 1 , whereinthe thermosetting resin is a melamine resin or a urea resin.5. An electrostatic charge image developing toner according to claim 1 , whereinthe shell layers have a film thickness of 4 nm or more and 10 nm or less.6. An electrostatic charge image developing toner according to claim 1 , whereinthe binder resin has a solubility parameter of 10 or more.7. A method for producing an electrostatic charge image developing toner containing a plurality of toner particles claim 1 , comprising:forming toner cores ...

Radiation Curable Dry Toner and Method for Preparing the Same

A radiation curable dry toner includes core-shell toner particles. The core-shell toner particles have an average volume-based diameter between 5 and 10 micrometre, and a core-shell toner particle thereof includes an inner portion having a radiation curable first resin material consisting of at least 90 weight %, preferably at least 95 weight %, of the total amount of resin material of the inner portion; an outer shell surrounding said inner portion, said outer shell including a second resin material, said second resin material being any one of the following: cured first resin material; or a resin material which is different from the first resin material. 1. A radiation curable dry toner comprising core-shell toner particles , wherein the core-shell toner particles have an average volume-based diameter between 5 and 10 micrometre , wherein a core-shell toner particle thereof comprises:a. an inner portion comprising a radiation curable first resin material consisting of at least 90 weight % of the total amount of resin material of the inner portion;b. an outer shell surrounding said inner portion, said outer shell comprising a second resin material, said second resin material being any one of the following:cured first resin material: ora resin material which is different from the first resin material.2. The radiation curable dry toner of claim 1 , wherein the resin material of the inner portion and of the outer shell is chosen such that the dry toner has a melt viscosity of less than 1000 Pa.s at 120° C. claim 1 , measured at a frequency of 1 Hz and an amplitude of 0.005 radians.3. The radiation curable dry toner of claim 1 , wherein the dry toner has a storage stability of at maximum 100 g/kg; wherein the storage stability is determined by shaking 20 g of the dry toner in a 50 ml bottle claim 1 , followed by conditioning the dry toner for 40 hours at 40° C. claim 1 , whereupon the dry toner is manually sieved over a 300 μm sieve and the amount of toner remaining on ...

METHOD FOR PRODUCING CARRIER FOR DEVELOPING ELECTROSTATIC LATENT IMAGE AND METHOD FOR PRODUCING TWO-COMPONENT DEVELOPER

Provided is a method for producing a carrier for developing an electrostatic latent image, the carrier including carrier particles each including a core particle with a surface coated with a coating material including a resin, and the method including the steps of: a) obtaining first coating resin particles by polymerizing an alicyclic methacrylate monomer using, as a polymerization initiator, an azo compound having a nitrogen atom-containing substituent; b) obtaining second coating resin particles by polymerizing an alicyclic methacrylate monomer using a persulfate as a polymerization initiator; and c) forming carrier particles by coating surfaces of core particles with a coating material obtained by mixing at least the first and second coating resin particles. 1. A method for producing a carrier for developing an electrostatic latent image , the carrier comprising carrier particles each comprising a core particle with a surface coated with a coating material comprising a resin , the method comprising the steps of:a) obtaining first coating resin particles by polymerizing an alicyclic methacrylate monomer using, as a polymerization initiator, an azo compound having a nitrogen atom-containing substituent;b) obtaining second coating resin particles by polymerizing an alicyclic methacrylate monomer using a persulfate as a polymerization initiator; andc) forming carrier particles by coating surfaces of core particles with a coating material obtained by mixing at least the first and second coating resin particles.2. The method for producing a carrier for developing an electrostatic latent image according to claim 1 , whereinthe ratio between the first and second coating resin particles is in the range of 10:90 to 90:10.3. The method for producing a carrier for developing an electrostatic latent image according to claim 1 , whereinthe alicyclic methacrylate monomers make up 20 to 100% by weight of the total weight of monomers used to form the first and second coating ...

TONER

Toner particles each have a toner core, a shell layer covering a surface of the toner core, and first resin particles containing a melamine resin. A shell layer coverage is 60% to 80%. The first resin particles each have an embedded portion and a protrusion portion. The embedded portions are embedded beneath the surface of the toner core. The protrusion portions protrude outward from the surface of the toner core in a radial direction of the toner particle. An average value Wd of thicknesses b of the shell layers, a number average value Dp of embedment depths c of the first resin particles, and a number average value Pd of primary particle diameters d of the first resin particles satisfy relations (1) to (3) shown below. 1. A toner comprising a plurality of toner particles , the toner being positively chargeable , whereineach of the toner particles has a toner core, a shell layer covering a surface of the toner core, and a plurality of first resin particles containing a melamine resin,a proportion of an area of a region, of a surface of the toner core, that is covered with the shell layer is at least 60% and no greater than 80%,each of the first resin particles has an embedded portion and a protrusion portion,the embedded portions are embedded beneath the surface of the toner core,the protrusion portions protrude outward from the surface of the toner core in a radial direction of the toner particle, and [{'br': None, 'i': 'Dp/Pd≤', '0.2≤0.8\u2003\u2003(1)'}, {'br': None, 'i': Pd−Dp', 'Wd, '()>\u2003\u2003(2)'}, {'br': None, 'i': 'Pd≤', '0.10 μm≤1.00 μm\u2003\u2003(3)'}], 'an average value Wd of thicknesses b of the shell layers, a number average value Dp of embedment depths c of the first resin particles, and a number average value Pd of primary particle diameters d of the first resin particles satisfy relations (1) to (3) shown below,'}where in relation (1), the number average value Dp of the embedment depths c of the first resin particles refers to a number ...

TONER FORMULATION HAVING A SILANE SURFACE TREATED ON ITS OUTER SURFACE AND METHOD OF PREPARING THE SAME

A chemically prepared toner composition according to one example embodiment includes a core including a first polymer binder, a colorant and a release agent; a shell that is formed around the core that includes a second polymer binder; and a borax coupling agent between the core and the shell and an alkoxysilane hydrocarbon or combination of different alkoxysilane hydrocarbons that are bonded to the outer surface of the shell using a hydrolytic deposition process. This successful alkoxysilane hydrocarbon surface treatment on the outer surface of the toner particle results in attaining a desirable charge stability in hot and humid environments and ultimately improving the quality of the toner, especially by reducing toner dusting, toner fuming and ultra-fine particles generation 1. A chemically prepared toner composition , comprising:a core having an outer surface, the core having components including a first polymer binder, a colorant and a release agent;a shell formed around the outer surface of the core, wherein the core and the shell form a toner particle having an outer surface; and1,3-di-n-octyltetramethyldisiloxane and diethoxydimethylsilane located on the outer surface of the toner particle, wherein alkoxy groups found in the 1,3-di-n-octyltetramethyldisiloxane and the diethoxydimethylsilane covalently bond with functional groups located on the outer surface of the toner particle.2. The chemically prepared toner of claim 1 , wherein the first polymer binder and the second polymer binder each include a polyester resin.3. The chemically prepared toner of claim 1 , wherein the first polymer binder and the second polymer binder each include a styrene polymer.4. A chemically prepared toner composition claim 1 , comprising: 'a shell formed around the outer surface of the core, wherein the core, the shell form a toner particle having an outer surface; and', 'a core having an outer surface, the core having components including a first polymer binder, a colorant and a ...

TONER FORMULATION HAVING A SILANE SURFACE TREATED ON ITS OUTER SURFACE AND METHOD OF PREPARING THE SAME

A method for producing core shell toner for electrophotography according to one embodiment, includes surface treating the outer surface of a core shell toner particle with a alkoxysilane hydrocarbon or combination of different alkoxysilane hydrocarbons using a hydrolytic deposition process after the core shell toner particle is fully formed. This method results in the bonding of the alkoxysilane hydrocarbon or combination of different alkoxysilane hydrocarbons to the outer surface of the core shell toner particle. In an alternative method, the outer surface of the toner is surface treated with the alkoxysilane hydrocarbon solution and then fused to form toner particles. The alkoxysilane hydrocarbon surface treated core shell toner also can be mixed with magnetic carrier beads to form a developer mix to be used in a dual component development electrophotographic printer. 1. A method for producing toner comprising:combining and agglomerating a first polymer emulsion with a pigment dispersion and a wax dispersion to form toner cores;combining and agglomerating a second polymer emulsion with the toner cores to form toner shells around the toner cores;fusing the aggregated toner cores and toner shells to form toner particles; andtreating the surface of the formed toner particles with 1,3-di-n-octyltetramethyldisiloxane and diethoxydimethylsilane, wherein alkoxy groups in the 1,3-di-n-octyltetramethyldisiloxane and the diethoxydimethylsilane covalently bond to functional groups located on the outer surface of the toner particle.2. A method for producing toner comprising:combining and agglomerating a first polymer emulsion with a pigment dispersion and a wax dispersion to form toner cores;combining and agglomerating a second polymer emulsion with the toner cores to form toner shells around the toner cores;fusing the aggregated toner cores and toner shells to form toner particles; andtreating the surface of the formed toner particles with n-octadecyltrimethoxysilane, ...

ELECTROSTATIC LATENT IMAGE DEVELOPER AND METHOD FOR PRODUCING ELECTROSTATIC LATENT IMAGE DEVELOPER

The disclosure concerns an electrostatic latent image developer including: a toner having toner base particles and an external additive; and a carrier, wherein the external additive contains silicone oil-treated silica and titanium oxide, Net intensity of titanium (Ti) in the toner to be measured by X-ray fluorescence analysis is 0.5 to 5 kcps, the carrier has a resin coating layer coating core material particles, and the resin coating layer has a constituent unit formed from an alicyclic (meth)acrylic acid ester. 1. An electrostatic latent image developer comprising:a toner having toner base particles and an external additive; anda carrier, whereinthe external additive contains silicone oil-treated silica and titanium oxide,Net intensity of titanium (Ti) in the toner to be measured by X-ray fluorescence analysis is 0.5 to 5 kcps,the carrier has a resin coating layer coating core material particles, andthe resin coating layer has a constituent unit formed from an alicyclic (meth)acrylic acid ester.2. The electrostatic latent image developer according to claim 1 , wherein an average aspect ratio to be calculated from a ratio of a number average major axis diameter to a number average minor axis diameter of the titanium oxide is 2 to 15.3. The electrostatic latent image developer according to claim 1 , wherein a number average primary particle size of the silicone oil-treated silica is 20 to 200 nm.4. The electrostatic latent image developer according to claim 1 , wherein a ratio of the Net intensity of titanium (Ti) to Net intensity of silicon (Si) in the toner to be measured by X-ray fluorescence analysis (Net intensity of titanium (Ti)/Net intensity of silicon (Si)) is less than 0.13.5. The electrostatic latent image developer according to claim 1 , wherein the toner base particles include a crystalline resin.6. A method for producing an electrostatic latent image developer claim 1 , comprising:mixing toner base particles, silicone oil-treated silica, and titanium ...

TONER PARTICLE, ELECTROPHOTOGRAPHIC TONER, DEVELOPING AGENT, TONER CARTRIDGE AND IMAGE FORMING APPARATUS, AND MANUFACTURE METHOD OF TONER PARTICLE

In accordance with an embodiment, a toner particle comprises two or more glass transition temperatures. Wherein, a first glass transition temperature is within a range from 5 degrees centigrade to 20 degrees centigrade and a second glass transition temperature is within a range from 50 degrees centigrade to 65 degrees centigrade. 1. A toner particle , including:two or more glass transition temperatures, whereina first glass transition temperature for a core of the toner particle is in a first range from 5 degrees centigrade to equal to or less than 9 degrees centigrade; anda second glass transition temperature for a shell of the toner particle is in a second range from 50 degrees centigrade to 65 degrees centigrade.2. The toner particle according to claim 1 , whereinthe two or more glass transition temperatures only includes the first glass transition temperature and the second glass transition temperature.3. The toner particle according to claim 1 , further comprising:a capsule structure constituted by the core and the shell.4. The toner particle according to claim 1 , further comprising:a coloring agent and a wax.5. A manufacture method of a toner particle claim 1 , including:adding a flocculant in a mixture containing a first binder resin, a coloring agent and a wax to form a core through aggregating the mixture at a first temperature of more than 20 degrees centigrade;cooling the core to a second temperature smaller than 20 degrees centigrade and adding a flocculant in the core at a third temperature smaller than 20 degrees centigrade; andadding a second binder resin in the core added with the flocculant more than twice at different temperatures to form a shell through fusing the second binder resin for the shell in the core; whereina first glass transition temperature of the first binder resin for the core is in a range from 0 degree centigrade to 20 degrees centigrade; anda second glass transition temperature of the second binder resin for the shell is in a ...

ELECTROGRAPHIC PRINTING USING ENCAPSULATED INK DROPLETS

An electrographic printer includes an image carrier configured to receive ink capsules onto the surface of the image carrier. The image carrier is configured to transfer the ink capsules to a medium. The ink capsules comprise an ink having a viscosity in a range of about 100 cP to about and 100,000 cP and an encapsulant layer surrounding the ink. A roller configured to compress the ink capsules onto the medium such that the encapsulant layer ruptures and the ink adheres to the medium. 1. An electrographic printer , comprising:an image carrier configured to receive ink capsules onto the surface of the image carrier and to transfer the ink capsules to a medium, the ink capsules comprising an ink having a viscosity in a range of about 100 cP to about and 100,000 cP and an encapsulant layer surrounding the ink; anda roller configured to compress the ink capsules onto the medium such that the encapsulant layer ruptures and the ink adheres to the medium.2. The electrographic printer of claim 1 , wherein the ink capsules are charged and the image carrier comprises an addressably charged surface which is configured to attract the charged ink capsules.3. The electrographic printer of claim 1 , wherein:the ink capsules are electrostatically charged to a first state; andfurther comprising a scorotron configured to electrostatically charge the image carrier to a second state.4. The electrographic printer of claim 3 , further comprising a laser configured to selectively optically discharge image elements on the image carrier to provide an electrostatic image on the image carrier that attracts the charged ink capsules.5. The electrographic printer of claim 1 , wherein:the image carrier comprises an insulating layer; andfurther comprising a source configured to direct the charged capsules toward the insulating layer of the image carrier to form an electrostatic image on the insulating layer that attracts the charged ink capsules.6. The electrographic printer of claim 5 , wherein ...

Additive Attachment on Toner Particles by Plasma

A process for attaching additives onto toner particles using plasma is described.

Metallic Toner Comprising Metal Integrated Particles

A toner and a toner process including providing at least one hybrid metallic toner component selected from the group consisting of hybrid metallic-latex particles, hybrid metallic-wax particles, hybrid metallic-colorant particles, and combinations thereof; contacting the at least one hybrid metallic toner component with one or more components selected from the group consisting of a latex polymer, a wax; and a colorant to form a blend; heating the blend at a temperature below the glass transition temperature of the latex polymer to form aggregated toner particles; adding a coalescing agent to the toner particles thereby coalescing the toner particles; and recovering the toner particles.

Electrostatic latent image developing toner

An electrostatic latent image developing toner includes a plurality of toner particle each including a toner mother particle and silica particles attached to a surface of the toner mother particle. The toner mother particle includes a toner core and a shell layer. The shell layer includes a first domain substantially formed from a first resin and a second domain substantially formed from a second resin. Both the first resin and the silica particles have higher positive chargeability than the second resin. A shell coverage is at least 40% and no greater than 90%. The toner particles each have an average value of surface potentials measured using a scanning probe microscope of at least +50 mV and no greater than +350 mV and a standard deviation thereof of no greater than 120 mV.

Method for producing toner for developing electrostatic charge image, and toner for developing electrostatic charge image

A method for producing a toner for developing an electrostatic charge image includes: performing first aggregation that involves aggregating at least resin particles and releasing agent particles contained in a dispersion to prepare a dispersion A containing first aggregated particles; performing second aggregation that involves adding a dispersion B containing shell resin particles to the dispersion A and aggregating the shell resin particles to form second aggregated particles; and heating and fusing the second aggregated particles to form fused particles. A total of 40 mmol or more and 190 mmol or less of a basic compound is added, per kilogram of toner particles to be obtained, from a time aggregation starts to terminate in the second aggregation to a time a temperature is elevated to a fusion temperature in the heating and fusing.

Preparing method of electrostatic charge image developing toner, electrostatic charge image developing toner, and electrostatic charge image developer

A preparing method of an electrostatic charge image developing toner includes: aggregating binder resin particles in a dispersion containing the binder resin particles to form aggregated particles; and coalescing the aggregated particles by heating a dispersion containing the aggregated particles to form toner particles, in which the aggregating includes adding a divalent or higher valent metal salt compound to the dispersion containing the binder resin particles, and the preparing method satisfies the following Requirement (1), Requirement (1): a ratio M/S of a total metal ion amount M (mol) generated from the divalent or higher valent metal salt compound to a total surface area S (m 2 ) of the binder resin particles at a start of the aggregating is 1.5×10 10 or more and 2.5×10 13 or less.

METHOD FOR PRODUCING RESIN PARTICLE DISPERSION, METHOD FOR PRODUCING TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT, AND TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT

A method for producing a resin particle dispersion includes using a resin particle dispersion production apparatus including: two or more resin particle dispersion production lines each including an emulsification tank in which a resin is subjected to phase inversion emulsification using two or more organic solvents and an aqueous medium to thereby obtain a phase-inverted emulsion, a distillation tank in which the organic solvents are removed from the phase-inverted emulsion by reduced pressure distillation to thereby obtain a resin particle dispersion, and plural distillate collection tanks that collect distillates formed during the reduced pressure distillation according to respective target distillate compositions; and a reusable distillate storage tank A that collects and stores a distillate collected in at least one distillate collection tank A among the distillates collected in the plural distillate collection tanks in each of the two or more resin particle dispersion production lines. The distillate collected in the reusable distillate storage tank A is delivered to the emulsification tank in at least one resin particle dispersion production line among the two or more resin particle dispersion production lines to reuse the distillate for production of a phase-inverted emulsion in the at least one resin particle dispersion production line. 1. A method for producing a resin particle dispersion , the method comprising:using a resin particle dispersion production apparatus including:two or more resin particle dispersion production lines each including an emulsification tank in which a resin is subjected to phase inversion emulsification using two or more organic solvents and an aqueous medium to thereby obtain a phase-inverted emulsion, a distillation tank in which the organic solvents are removed from the phase-inverted emulsion by reduced pressure distillation to thereby obtain a resin particle dispersion, and a plurality of distillate collection tanks that ...

PROCESS FOR PRODUCING A TONER

The production process of the present invention includes: a first step of heating a dispersion containing an aqueous medium and a binder resin containing a crystalline resin to a temperature higher than or equal to the melting point of the crystalline resin in a step of aggregating and fusing a fine particle of the binder resin containing the crystalline resin to produce a toner base particle; a second step of cooling the dispersion having been heated in the first step and having a temperature higher than the recrystallization temperature Rc of the crystalline resin to a temperature lower than Rc at a temperature-lowering rate of 1° C./min or higher; and a third step of maintaining the dispersion having been cooled in the second step at a temperature higher than or equal to Rc−25° C. and lower than or equal to Rc−5° C. for 30 minutes or longer. 1. A process for producing a toner comprising:a first step of heating a dispersion containing an aqueous medium and a binder resin containing a crystalline resin to a temperature higher than or equal to a melting point of the crystalline resin in a step of aggregating and fusing a fine particle of the binder resin containing the crystalline resin to produce a toner base particle;a second step of cooling the dispersion having been heated in the first step and having a temperature higher than a recrystallization temperature Rc of the crystalline resin to a temperature lower than the Rc at a temperature-lowering rate of 1° C./min or higher; anda third step of maintaining the dispersion having been cooled in the second step at a temperature higher than or equal to the Rc−25° C. and lower than or equal to the Rc−5° C. for 30 minutes or longer.2. The process for producing a toner according to claim 1 , wherein claim 1 , in the third step claim 1 , the temperature of the dispersion is maintained at a temperature higher than or equal to the Rc−25° C. and lower than or equal to the Rc−10° C. for 30 minutes or longer.3. The process for ...

Toner

A toner includes toner particles. The toner particles each include a toner core, silica particles located on a surface of the toner core, and a shell layer disposed over the surface of the toner core on which the silica particles are located. For at least 80% by number of the toner particles, along at least 80% of a circumferential length of a cross-section of the toner particle when the cross-section is analyzed by EELS, the shell layer has a thickness of at least 5 nm and satisfies a condition that a ratio of an intensity INc relative to an intensity INs is at least 0.0 and no greater than 0.2. The intensity INs indicates intensity of an N—K shell absorption-edge originating from nitrogen atoms in the shell layer. The intensity INc indicates intensity of an N—K shell absorption-edge originating from nitrogen atoms in the toner core.

RESIN PARTICLE AND METHOD OF PRODUCING THE RESIN PARTICLE, AND TONER AND METHOD OF PRODUCING THE TONER

Provided is a toner, comprising a toner particle having a core-shell structure composed of a core particle and a shell phase on a surface of the core particle, the core particle containing a resin X and a colorant, the shell phase being derived from a resin fine particle containing a resin Y, in which a relationship among a SP value of the resin X, a SP value of the resin Y, and a SP value of an organic solvent falls within a specific range, and a relationship between a number-average particle diameter of the resin fine particle when the resin fine particle is dispersed in water and a number-average particle diameter of the resin fine particle when the resin fine particle is dispersed in the organic solvent falls within a specific range. 2. A toner according to claim 1 , wherein the shell phase is formed through a step of bringing the core particle and the resin fine particle into contact with each other in presence of the organic solvent.3. A toner according to claim 1 , wherein the resin Y is a resin having a crosslinked structure.4. A toner according to claim 1 , wherein the resin X comprises a polyester as a main component and the resin Y comprises a polyester.5. A toner according to claim 1 , wherein the SPsatisfies the following formula (7).{'br': None, 'i': 'SP', 'sub': 'SOL', '18.0≦≦23.0\u2003\u2003(7)'}6. A toner according to claim 1 , wherein the SPis 24.0 (J/cm)or less.7. A toner according to claim 1 , wherein the resin Y is a polymer of a monomer composition comprising a polyester having a polymerizable unsaturated group.8. A toner according to claim 7 , wherein an average number of polymerizable unsaturated groups in one molecule of the polyester having a polymerizable unsaturated group is 1.0 or more and 3.0 or less.9. A toner according to claim 7 , wherein the monomer composition further comprises a monomer having two or more polymerizable unsaturated groups claim 7 , the monomer having a weight-average molecular weight of 200 or more and 2 claim 7 , ...

Resin fine particle, method of producing resin particle including using the resin fine particle, and method of producing toner

Provided is a method of producing a toner including the steps of: mixing a resin solution comprising a resin R, a colorant, and an organic solvent, a resin fine particle comprising a resin S containing an element α, and carbon dioxide to form a droplet having a surface covered with the resin fine particle; introducing carbon dioxide in a liquid state and pressurizing to extract the organic solvent in the droplet; and removing the extracted organic solvent together with the carbon dioxide to provide a toner particle. In the method of producing a toner, when the resin fine particle is treated with the carbon dioxide in a liquid state, a change in amount of the element α on the surface of the resin fine particle after the treatment as compared to the amount before the treatment falls within a specific range.

Liquid electrophotographic ink composition

A method for coating pigment particles is provided, the method comprising heating a polymer resin in a carrier fluid to dissolve the polymer resin; suspending in the carrier fluid white pigment particles to be coated; cooling the carrier fluid to effect precipitation of the polymer resin from the carrier fluid such that a coating of the resin is at least partially formed on the pigment particles; reheating the suspension of partially coated white pigment particles in the carrier fluid; and cooling the carrier fluid at a controlled rate to effect precipitation of the polymer resin from the carrier fluid such that a coating of the resin is formed on the pigment particles, thereby producing the white liquid electrophotographic ink composition.

CONSTITUENT PARTICLES USED FOR PRODUCTION OF THREE-DIMENSIONAL OBJECT, POWDER INCLUDING CONSTITUENT PARTICLES, AND METHOD FOR PRODUCING THREE-DIMENSIONAL OBJECT FROM CONSTITUENT PARTICLES

Provided are constituent particles containing a water-soluble material with high flowability in the form of powder, the constituent particles being capable of forming a support member that can be removed with a water-containing solvent in a process for producing a three-dimensional object. The constituent particles used for the production of a three-dimensional object each include a core and a shell that covers at least part of a surface of the core, the core containing a water-soluble material most abundantly, and a material contained in the shell most abundantly having a lower water solubility than the water-soluble material contained in the core. 1. Constituent particles each containing at least one water-soluble material , each of the constituent particles comprising:a core; anda shell that covers at least part of a surface of the core,the core containing the at least one water-soluble material most abundantly, anda material contained in the shell most abundantly having a lower water solubility than the at least one water-soluble material contained in the core.2. The constituent particles according to claim 1 , wherein a coverage of the surface of the core by the shell is 40% or more and 95% or less.3. The constituent particles according to claim 1 , wherein each of the constituent particles contains the at least one water-soluble material in an amount of 70% or more by volume.4. The constituent particles according to claim 1 , wherein a percentage of the core of each of the constituent particles is 50% or more by volume.5. The constituent particles according to claim 1 , wherein a percentage of the at least one water-soluble material contained in the core is 50% or more by volume with respect to the entire core.6. The constituent particles according to claim 1 , wherein the at least one water-soluble material contained in the core is any of a water-soluble inorganic material claim 1 , a water-soluble hydrocarbon claim 1 , poly(alkylene oxide) claim 1 , poly( ...

PROCESS FOR PRODUCING TONER FOR DEVELOPMENT OF ELECTROSTATIC IMAGES

The present invention relates to a process for producing a toner for development of electrostatic images, including the following steps (1) to (3): Step (1): aggregating resin particles (X) containing a composite resin that contains a segment constituted of a polyester resin (a) obtained by polycondensing an alcohol component containing 80 mol % or more of a propyleneoxide adduct of bisphenol A and a polycarboxylic acid component, and a vinyl-based resin segment containing a constitutional unit derived from a styrene-based compound, in an aqueous medium, to obtain aggregated particles (1); Step (2): aggregating the aggregated particles (1) obtained in the step (1) with resin particles (Y) containing a polyester resin (b) obtained by polycondensing an alcohol component containing 80 mol % or more of an ethyleneoxide adduct of bisphenol A and a polycarboxylic acid component to obtain aggregated particles (2); and Step (3): coalescing the aggregated particles (2) obtained in the step (2). 1. A process for producing a toner for development of electrostatic images , comprising:(1) aggregating resin particles (X) comprising a composite resin that comprises a segment of a polyester resin (a) obtained by polycondensing an alcohol component comprising 80 mol % or more of a propyleneoxide adduct of bisphenol A and a polycarboxylic acid component, and a vinyl-based resin segment comprising a constitutional unit derived from a styrene-based compound, in an aqueous medium, to obtain aggregated particles (1);(2) aggregating the aggregated particles (1) obtained from said (1) aggregating with resin particles (Y) comprising a polyester resin (b) obtained by polycondensing an alcohol component comprising 80 mol % or more of an ethyleneoxide adduct of bisphenol A and a polycarboxylic acid component to obtain aggregated particles (2); and(3) coalescing the aggregated particles (2) obtained in the step from said (2) aggregating.2. The process for producing a toner for development of ...

Toner and method of manufacturing the same

A toner contains a plurality of toner particles. Each of the toner particles includes a toner core containing a binder resin, a shell layer disposed over a surface of the toner core, internal particles located within the shell layer, and an external additive located on a surface of the shell layer. Each of the toner particles has 4 to 169 projections resulting from the internal particles and having a height of no less than 40 nm and no greater than 200 nm when a 1-μm 2 region of the surface of the toner particle is observed, and the projections satisfy the following equation (1) {(1000/2 Y )−0.5} 2 ≦X ≦{(1000/2 Y )+0.5} 2   (1) wherein X represents the number of the projections, and Y represents the height of the projections.

Electrostatic charge image developing toner, electrostatic charge image developer, and toner cartridge

An electrostatic charge image developing toner includes a toner particle including a core particle containing a polyester resin and a coating layer containing a vinyl resin that coats the surface of the core particle, and an external additive that is formed of silica particles having an average circularity of from 0.75 to 0.9 and an average value of ratios of circle equivalent diameters Da obtained by a plane image analysis to the maximum height H obtained by a stereoscopic image analysis of more than 1.5 and less than 1.9.

Method for manufacturing electrostatic latent image developing toner

An electrostatic latent image developing toner is manufactured by mixing an aqueous medium dispersion liquid (X) containing negatively chargeable toner cores and an aqueous medium dispersion liquid (Y) containing positively chargeable resin particulates, followed by stirring the mixture liquid to form shell layers each on a surface of the toner cores with the resin particulates. The shell layers are formed with the resin particulates subjected to a stirring treatment together with an anionic surfactant.

Image forming apparatus and electrophotographic cartridge

The invention is to provide an image forming apparatus and an electrophotographic cartridge, which are free from problems of cleaning failure, filming, soiling, residual images (ghosts), fogging, density reduction, noise and the like and which can provide high-definition images even when a toner having a small particle size and having a high degree of circularity is used and even when a photoreceptor having a small outer diameter is used. An image forming apparatus comprising: an electrophotographic photoreceptor containing a conductive support and a photosensitive layer on the conductive support, a charging unit for charging the electrophotographic photoreceptor, an imagewise exposing unit for imagewise exposing the charged electrophotographic photoreceptor to form an electrostatic latent image thereon, a developing unit for developing the electrostatic latent image with a toner, and a transferring unit for transferring the toner from the electrophotographic photoreceptor to a receiving unit, wherein the outer diameter of the electrophotographic photoreceptor is 20 mm or less, the photosensitive layer contains a polyarylate resin, and the toner satisfies the specific requirements (1) and (2).

TONER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPMENT

The present invention relates to a toner for electrostatic charge image development, including toner base particles containing a binder resin containing as a main component a vinyl resin having a constitutional unit derived from a monomer having an acid group, and aluminum, wherein a concentration of the aluminum in the toner base particles, as measured by radio inductively coupled plasma emission spectral analysis, is from 900 to 2,200 ppm. According to the present invention, there is provided a means for improving the environmental stability of electrification, and the glossiness and the image density of the image to be formed in a good balance while maintaining sufficient low temperature fixability in a toner for electrostatic charge image development. 1. A toner for electrostatic charge image development , comprising toner base particles containing a binder resin containing as a main component a vinyl resin having a constitutional unit derived from a monomer having an acid group , and aluminum , whereina concentration of the aluminum in the toner base particles, as measured by radio inductively coupled plasma emission spectral analysis, is from 900 to 2,200 ppm.2. The toner for electrostatic charge image development according to claim 1 , wherein the acid group is a carboxylic acid group.3. The toner for electrostatic charge image development according to claim 1 , wherein the monomer having an acid group is (meth)acrylic acid.4. The toner for electrostatic charge image development according to claim 1 , wherein a content of the constitutional unit derived from a monomer having an acid group is from 3 to 20% by mass claim 1 , relative to the total constitutional units of the vinyl resin.5. The toner for electrostatic charge image development according to claim 1 , where in the concentration of the aluminum is from 1 claim 1 ,200 to 1 claim 1 ,800 ppm.6. The toner for electrostatic charge image development according to claim 1 , wherein the toner base particles ...

PROCESS FOR PRODUCING A TONER

The process for producing a toner according to the present invention includes: a first step of heating a dispersion containing an aqueous medium and a binder resin containing a crystalline resin to a temperature higher than or equal to the melting point of the crystalline resin; a second step of maintaining the temperature of the dispersion at temperature T1 for 30 minutes or longer; and a third step of maintaining the temperature of the dispersion at temperature T2 for 30 minutes or longer. In the following formula, Rc denotes the recrystallization temperature of the crystalline resin. 2. The process for producing a toner according to claim 1 , further comprising a step of cooling the dispersion having been heated in the first step and having a temperature higher than the Rc to a temperature lower than the Rc at a temperature-lowering rate of 1° C./min or higher.3. The process for producing a toner according to claim 2 , wherein the cooling rate for the dispersion is 2° C./min or higher.4. The process for producing a toner according to claim 1 , further comprising a step of cooling the dispersion having been heated in the first step and having a temperature higher than the Rc to a temperature lower than Rc−25° C.5. The process for producing a toner according to claim 1 , wherein the second step is carried out after the third step.6. The process for producing a toner according to claim 1 , wherein a crystalline polyester resin is used as the crystalline resin. This application is entitled to and claims the benefit of Japanese Patent Application No. 2016-013355, filed on Jan. 27, 2016, the disclosure of which including the specification, drawings and abstract is incorporated herein by reference in its entirety.1. Field of the InventionThe present invention relates to a process for producing a toner for development of electrostatic images.2. Description of Related ArtTo increase printing speed and achieve further saving of energy for reduction of environmental loads ...

ELECTROSTATIC LATENT IMAGE DEVELOPING TONER

Toner particles each include a toner core, a shell layer covering a surface of the toner core, and a plurality of wax particles. The toner core contains a binder resin and does not contain a wax. The wax particles are each located on a surface of the shell layer. The toner core and each of the wax particles are bonded together through covalent bonds within the shell layer. The covalent bonds include a first amide bond and a second amide bond. The shell layer contains a vinyl resin. The vinyl resin includes a constitutional unit (1-1), a constitutional unit (1-2), and a constitutional unit (1-3). An amide bond included in the constitutional unit (1-1) is the first amide bond. An amide bond included in the constitutional unit (1-2) is the second amide bond. 2. The electrostatic latent image developing toner according to claim 1 , whereinthe shell layer further contains a positively chargeable resin and a hydrophobic resin,the positively chargeable resin has stronger positive chargeability than the binder resin, andthe hydrophobic resin has stronger hydrophobicity than the positively chargeable resin.3. The electrostatic latent image developing toner according to claim 2 , whereinthe vinyl resin is present in a portion of the shell layer located between the toner core and each of the wax particles, andthe positively chargeable resin and the hydrophobic resin cover a surface region of the toner core exposed from the vinyl resin.4. The electrostatic latent image developing toner according to claim 3 , whereinthe shell layer has an extended portion,the extended portion extends from the portion of the shell layer located between the toner core and each of the wax particles toward an outer side of the toner particle in a radial direction thereof, and covers a part of a surface of at least one of the wax particles, andthe extended portion contains the vinyl resin.5. The electrostatic latent image developing toner according to claim 1 , whereinan acid value of the binder ...

COMPLEX PARTICLE, EXTERNAL ADDITIVE FOR TONER AND METHOD OF PREPARING COMPLEX PARTICLE

A complex particle including a core particle and a shell particle, 1. A complex particle comprising:a core particle and a shell particle,wherein the shell particle is disposed on the core particle,wherein the core particle comprises an organic material or an inorganic material as a primary component and the shell particle comprises the other of the organic material and the inorganic material as a primary component, an average particle diameter of the core particle is greater than or equal to about 80 nanometers and less than or equal to about 300 nanometers,', 'a coefficient of variation of an average particle diameter of the core particle is greater than or equal to about 2% and less than or equal to about 10%,', 'an average particle diameter of the shell particle is greater than or equal to about 5 nanometers and less than or equal to about 30 nanometers,', 'a ratio of the average particle diameter of the shell particle relative to the average particle diameter of the core particle is greater than or equal to about 0.016 and less than or equal to about 0.25,', 'an average particle diameter of the complex particle is greater than or equal to about 90 nanometers and less than or equal to about 350 nanometers,, 'wherein'}{'sub': 1', '2', '1', 'v', '1', '2', 's', '2, 'sup': β1', 'β2, 'a ratio of multipliers a volume resistance and a sheet resistance of the complex particle is greater than or equal to about 0.7 and less than or equal to about 1.4, wherein the ratio of multipliers is a ratio of β/β, wherein βis an exponent in an expression of the volume resistance according to the formula ρ=α·10and wherein βis an exponent in an expression of the sheet resistance according to the formula ρ=α·10, and'}wherein a change of a number of shell particles present on the core particle before and after ultrasonic irradiation of a dispersion liquid of the complex particle including about 1 weight percent of the complex particle dispersed in water, using a power of about 110 Watts ...

DEVELOPER WITH TONER AND CARRIER, AND IMAGE FORMING APPARATUS USING THE SAME

A developer according to an embodiment includes a toner having a color erasable by heating and a carrier. The carrier includes a core portion and a coating portion covering at least 50% of the core portion. The coating portion includes a white-colored additive agent which suppresses an increase in electrification due to friction between the toner and the carrier, a mass of the additive agent being between 20% and 60% of a total mass of the coating portion. 1. A developer for use in an image forming apparatus , the developer comprising:a toner having a color erasable by heating; and{'sup': 8', '10, 'a carrier including a core portion and a coating portion covering at least 50% of the core portion, the coating portion including a white-colored additive agent which suppresses an increase in electrification due to friction between the toner and the carrier, a mass of the additive agent being between 20% and 60% of a total mass of the coating portion, and an electrical resistivity of the carrier is between 8×10and 8×10(Ω·cm).'}2. The developer according to claim 1 , wherein the mass of the additive agent included in the coating portion is between 30% and 50% of the total mass of the coating portion.3. The developer according to claim 1 , wherein the electrical resistivity of the carrier is between 5×10and 2×10(Ω·cm).4. The developer according to claim 1 , wherein a ratio of a mass of the coating portion to a mass of the core portion is between 0.004 and 0.02.5. The developer according to claim 4 , wherein the ratio of the mass of the coating portion to the mass of the core portion is between 0.01 and 0.02.6. The developer according to claim 1 , wherein a mass of the carrier is between 90% and 93% of the total mass of the developer.7. The developer according to claim 1 , wherein a volume average particle diameter of a particle group of the carrier is between 37 μm and 43 μm.8. The developer according to claim 1 , wherein the toner includes a coloring agent and a binder ...

ELECTROSTATIC LATENT IMAGE DEVELOPING TONER

Toner particles of a toner each include a toner mother particle and an external additive. The toner mother particle includes a toner core containing a binder resin and a shell layer covering a surface of the toner core. The external additive contains a plurality of first external additive particles each containing a resin. The first external additive particles are present on a surface of the shell layer. The toner core and each of the first external additive particles are bonded together through a covalent bond in the shell layer. The covalent bond includes a first amide bond and a second amide bond. The shell layer contains a vinyl resin. The vinyl resin includes constitutional units (1-1), (1-2), and (1-3). The first amide bond is an amide bond included in the constitutional unit (1-1). The second amide bond is an amide bond included in the constitutional unit (1-2). 2. The electrostatic latent image developing toner according to claim 1 , whereina detachment ratio of the first external additive particles is at least 0.1% and less than 5.0% after 10-minute irradiation of the electrostatic latent image developing toner with a ultrasonic having a high frequency output of 100 W and an oscillation frequency of 50 kHz.3. The electrostatic latent image developing toner according to claim 1 , whereinthe shell layer further contains a positively chargeable resin and a hydrophobic resin,the positively chargeable resin has higher positive chargeability than the binder resin, andthe hydrophobic resin has higher hydrophobicity than the positively chargeable resin.4. The electrostatic latent image developing toner according to claim 3 , whereinthe vinyl resin is present at a part of the shell layer that is located between the toner core and each of the first external additive particles, andthe positively chargeable resin and the hydrophobic resin cover a part of a surface region of the toner core that is exposed from among the vinyl resin.5. The electrostatic latent image ...

TONER

By controlling the migration to the toner particle surface of the crystalline polyester present in the toner particle, a toner is provided that exhibits an excellent durability in long-term use, a stable charging performance after holding in a high-temperature, high-humidity environment, and an excellent low-temperature fixability, in which the toner having a toner particle that contains an amorphous resin, a crystalline polyester, and a wax, wherein the toner particle includes, at the surface thereof, a coat layer containing a cyclic polyolefin resin. 16-. (canceled)7. A process for producing a toner containing a toner particle , comprising the steps of:obtaining a resin base particle containing an amorphous resin, a crystalline polyester, and a wax,adsorbing a cyclic polyolefin resin particle to the resin base particle surface, andmelting the cyclic polyolefin resin particle by contacting hot air current with the resin base particle adsorbing the cyclic polyolefin resin particle, thereby forming a coat layer containing a cyclic polyolefin resin on the resin base particle surface, thereby obtaining the toner particle, whereinthe toner particle contains an amorphous resin, a crystalline polyester, and a wax,the toner particle comprises said coat layer and an inner region which is coated by the coat layer,the coat layer is present at the surface of the toner particle, and contains a cyclic polyolefin resin, andthe inner region contains the crystalline polyester.8. The process according to claim 7 , wherein a temperature of the hot air current is 100 to 300° C.9. The process according to claim 7 , wherein a temperature of the hot air current is 130 to 170° C.10. The process according to claim 7 , wherein a glass transition temperature of the cyclic polyolefin resin is 65 to 105° C.11. The process according to claim 7 , wherein a glass transition temperature of the cyclic polyolefin resin is 75 to 85° C.12. The process according to claim 7 , wherein an average layer ...

Polyester Resins Comprising Gallic Acid and Derivatives Thereof

The present disclosure provides a polyester toner resin comprising gallic acid for use in manufacturing an emulsion aggregation (EA) toner for imaging devices.

EMULSION AGGREGATION TONER FOR SENSOR AND ANTIBACTERIAL APPLICATIONS

Provided is a toner that has a plurality of toner particles. Each toner particle can include a binder resin core and a shell disposed about the binder resin core. The binder resin core can include at least one binder resin. The shell can include a plurality of metal nanoparticles. The binder resin core can be prepared by forming an aggregate of the binder resin in which metallic nanoparticles are not present. 1. A print comprising a substrate and a toner disposed on a surface of the substrate , the toner comprising a plurality of toner particles and each toner particle comprising:a binder resin core comprising at least one binder resin; anda shell disposed about the binder resin core comprising a plurality of metal nanoparticles, 'forming an aggregate of the binder resin in which metallic nanoparticles are not present.', 'wherein the binder resin core is prepared by a method comprising2. The print of claim 1 , wherein the substrate is a polymer claim 1 , a fabric claim 1 , paper claim 1 , or a microchip.3. The print of claim 1 , wherein the print is a component of a sensor claim 1 , a detector claim 1 , a textile claim 1 , a toy claim 1 , a label claim 1 , an antimicrobial coating.4. A print comprising a substrate that requires antimicrobial claim 1 , antiviral or antiviral properties and a toner disposed on a surface of the substrate claim 1 , the toner comprising a plurality of toner particles and each toner particle comprising:a binder resin core comprising at least one binder resin; anda shell disposed about the binder resin core comprising a plurality of silver nanoparticles,wherein the binder resin core is prepared by a method comprising:forming an aggregate of the binder resin in which silver nanoparticles are not present.5. The print of claim 4 , wherein the silver nanoparticles are incorporated in or on the substrate claim 4 , and wherein the silver nanoparticles include an effective amount of a biomolecule for causing the silver particles to possess ...

TONER FORMULATION USING CRYSTALLINE POLYESTER ENCAPSULATED WITH A STYRENE ACRYLATE LATEX AND METHOD OF PREPARING THE SAME

The present disclosure relates to a chemically prepared toner composition including a toner particle having a core including a first polymer binder, an styrene acrylate encapsulated crystalline polyester latex, a pigment, and a shell formed around the core including a second polymer binder and method to make the same. The disclosed method of preparing the toner results in a change in the distribution of the components of the toner particle wherein the lower molecular weight resins, the pigment and the wax are located away from the surface of the toner particle and the pigment is clinging to the edge of the wax domain. 1. A chemically prepared toner comprising:a core including a first polymer binder, a crystalline polyester encapsulated by a polymer latex that is polymerized by a monomer solution including a hydrophilic monomer having one of a carboxyl (—COOH) functional group and a hydroxyl (—OH) functional group and hydrophobic styrene and acrylate monomers, a pigment, a wax; anda shell formed around the core including a second polymer binder wherein the pigment and wax are located away from the surface of the toner particle.2. The chemically prepared toner of claim 1 , wherein the hydrophobic acrylate monomer is an alkyl acrylate.3. The chemically prepared toner of claim 2 , wherein the alkyl acrylate monomer is butyl acrylate.4. The chemically prepared toner of claim 2 , wherein the alkyl acrylate monomer is lauryl acrylate.5. The chemically prepared toner of claim 1 , wherein the hydrophilic monomer having the carboxyl (—COOH) functional group is beta-carboxyethyl acrylate and the hydrophilic monomer having the hydroxy (—OH) functional group is hydroxyethyl methacrylate.6. The chemically prepared toner of claim 1 , wherein a glass transition temperature (Tg) of the polymer latex is between 20° C. and 60° C.7. The chemically prepared toner of claim 1 , wherein the first polymer binder and the second polymer binder each include a polyester resin.8. The chemically ...

Crash cooling method to prepare toner

The present disclosure relates generally to a method to make a chemically prepared toner that employs a crash cooling process. In particular, the crash cooling process involves the addition of a toner slurry having a temperature between 70° C. and 90° C. to an equivalent amount of cold water having a temperature between 5° C. and 20° C. Polyester and styrene acrylic toners as well as polyester core shell toners having a borax coupling agent between the toner core and toner shell made from this cooling process results in an improvement to the amount of toner waste, thereby achieving a higher toner usage efficiency for an electrophotographic printing system.

SECURITY TONER AND PROCESS OF USING THEREOF

The present disclosure relates to toner compositions containing an IR-taggant, and method of making thereof. The disclosure also relates to method for confirming authenticity of an item. 1. An emulsion aggregation toner having toner particles comprising a core and a shell , wherein the core comprises 'wherein the IR-taggant has an emission peak in the wavelength range of about 800 to 1600 nm;', 'an IR-taggant selected from the group consisting of an inorganic ceramic nanoparticle, an IR-emitting organic dye, and an IR-emitting quantum dot;'}a crystalline polyester resin; andan amorphous polyester resin.2. The toner composition of wherein the IR-taggant is present in an amount of from about 0.01 weight percent to 40 weight percent by weight of the toner.3. The toner composition of wherein the IR-taggant has an absorption peak in the wavelength range of about 300 to about 1100 nm.4. (canceled)5. The toner composition of wherein the IR-taggant has an average particle size of from about 10 nm to about 800 nm.6. The toner composition of wherein the inorganic ceramic nanoparticle is selected from the group consisting of silicon oxide claim 1 , yttrium oxide claim 1 , lithium oxide claim 1 , ytterbium oxide claim 1 , and mixtures thereof.7. The toner composition of wherein the IR-emitting organic dye is selected from the group consisting of polymethine dyes claim 1 , anthraquinone dyes claim 1 , dithiol metal salt dyes claim 1 , phthalocyanine dyes claim 1 , indophenol dyes claim 1 , aminium dyes claim 1 , diimonium dyes claim 1 , azo dyes claim 1 , cyanine dyes claim 1 , oxazine dyes claim 1 , rhodamine dyes claim 1 , distyryl-boradiazaindacene dyes claim 1 , sulfoindocyanine succidimidyl esters claim 1 , acridone dyes claim 1 , and mixtures thereof.8. The toner composition of wherein the IR-emitting quantum dots is selected from the group consisting of CdTexSe1-x/CdS quantum dots claim 1 , CuInZnSeS quantum dot claim 1 , AgInS2 and mixtures thereof.9. The toner ...

Toner Process Employing Dual Chelating Agents

A toner process including a) mixing reagents comprising at least one amorphous resin, an optional crystalline resin, an optional styrene, acrylate or styrene/acrylate, an optional wax, and an optional colorant to form an emulsion comprising a resin particle; b) adding at least one aggregating agent and aggregating said resin particle to form a nascent toner particle; c) optionally, adding one or more resins to form a shell on said nascent toner particle to yield a core-shell particle; d) adding a first chelating agent and a second chelating agent; wherein said first chelating agent and said second chelating agent are different; e) freezing particle growth to form an aggregated toner particle; f) coalescing said aggregated toner particle to form a toner particle; and g) optionally, collecting said toner particle. 1. A toner process comprising:a) mixing reagents comprising at least one amorphous resin, an optional crystalline resin, an optional styrene, acrylate or styrene/acrylate, an optional wax, and an optional colorant to form an emulsion comprising a resin particle;b) adding at least one aggregating agent and a metal coagulant and aggregating said resin particle to form a nascent toner particle;c) optionally, adding one or more resins to form a shell on said nascent toner particle to yield a core-shell particle;d) adding a first chelating agent and a second chelating agent;wherein said first chelating agent and said second chelating agent are different;wherein said first chelating agent has a first ability to remove metal from the toner particle;wherein said second chelating agent has a second ability to remove metal from the toner particle; andwherein said first ability to remove metal from the toner particle and said second ability to remove metal from the toner particle are different;e) freezing particle growth to form an aggregated toner particle;f) coalescing said aggregated toner particle to form a toner particle; andg) optionally, collecting said toner ...

ELECTROSTATIC LATENT IMAGE DEVELOPING TONER

An electrostatic latent image developing toner includes a plurality of toner particles each including a core and a shell layer covering a surface of the core. The shell layer includes a resin film and a plurality of resin particles. The shell layer contains a first resin forming the resin film, a second resin forming the resin particles, and an alkyl benzene sulfonic acid compound. The first resin is more hydrophobic than the second resin. The second resin is more positively chargeable than the first resin. The second resin has a repeating unit capable of forming a salt with the alkyl benzene sulfonic acid compound. 1. An electrostatic latent image developing toner , comprisinga plurality of toner particles each including a core and a shell layer covering a surface of the core, whereinthe shell layer includes a resin film and a plurality of resin particles,the shell layer contains a first resin forming the resin film, a second resin forming the resin particles, and an alkyl benzene sulfonic acid compound,the first resin is more hydrophobic than the second resin,the second resin is more positively chargeable than the first resin, andthe second resin has a repeating unit capable of forming a salt with the alkyl benzene sulfonic acid compound.2. The electrostatic latent image developing toner according to claim 1 , whereinthe shell layer contains p-toluenesulfonic acid or a derivative thereof as the alkyl benzene sulfonic acid compound.3. The electrostatic latent image developing toner according to claim 2 , whereinan amount of the alkyl benzene sulfonic acid compound contained in the shell layer is at least 50 ppm and no greater than 4000 ppm relative to a total mass of the electrostatic latent image developing toner.4. The electrostatic latent image developing toner according to claim 1 , whereinthe second resin has at least one repeating unit derived from an electron-donating heteroaromatic compound as the repeating unit capable of forming a salt with the alkyl ...