Abstract: Provided is an electrostatic charge image developing toner including toner base particles which contain a polyester resin and a vinyl resin and does not have a coating layer and wherein the concentration of the polyester resin on the particle surface is higher than the concentration of the polyester resin in the inside of the particles, and a sol-gel silica which has an average circularity of from 0.75 to 0.9, on the surface of the toner base particles.

Abstract: Provided is an electrostatic charge image developing toner including toner base particles which contain a polyester resin and a vinyl resin and does not have a coating layer and wherein the concentration of the polyester resin on the particle surface is higher than the concentration of the polyester resin in the inside of the particles, and a sol-gel silica which has an average circularity of from 0.75 to 0.9, on the surface of the toner base particles.

Abstract: A toner for developing an electrostatic image is provided, which contains at least a binder resin, a colorant and a releasing agent, the releasing agent, has an endothermic peak temperature measured by a differential scanning calorimeter of from 60 to 100° C., and an endothermic amount a of the releasing agent per unit weight (J/g) at temperatures equal to or lower than a glass transition onset temperature of the binder resin measured by a differential scanning calorimeter, a total endothermic amount b of the releasing agent per unit weight (J/g) and a volume average particle diameter c(?m) of the toner has the relationship: 0.05?(a/b)×c?0.6.

Abstract: There is provided an electrophotographic toner, which includes a binder resin and a colorant, wherein, with a total intensity (kcps) of all elements detected in the toner due to fluorescent X-ray measurement designated as A and an intensity of nitrogen designated as B, B/A is from about 0.01 to about 0.5, and a ratio of nitrogen measured by X-ray photoelectron spectrometry after ion etching at an accelerating voltage of 10 mV for 180 seconds is from about 0.1 atom % to about 7.5 atom %.

Abstract: The present invention provides a toner for electrophotography having a capsule structure including a core and a shell that covers the core, wherein the core contains a colorant, a releasing agent, an amorphous resin, and a block polymer containing a crystalline part and an amorphous part, the weight-average molecular weight of the block polymer is 10,000 or more, the weight-average molecular weight of the resin used in formation of the amorphous part of the block polymer is 1000 to 5000, and the weight-average molecular weight of the resin used in formation of the crystalline part of the block polymer is at least 2 times the weight-average molecular weight of the resin used in formation of the amorphous part of the block polymer, a method of manufacturing the same, a developer for electrophotography including the toner and a carrier, and an image forming method using the developer for electrophotography.

Abstract: Provided are a toner for developing an electrostatic image comprising a crystalline resin having an ester bond and at least one of a sulfide bond or a disulfide bond in the main-chain, an electrostatic image developer and an image-forming process by using the same, a method of producing the toner for developing electrostatic image, and a resin particle dispersion using the same.

Abstract: A toner for developing an electrostatic latent image includes a binder resin, a colorant and a releasing agent. The releasing agent contains a hydrocarbon component including a linear hydrocarbon component, and the liner hydrocarbon component has a carbon number distribution and an average carbon number N. An amount of a component having a carbon number of from N?4 to N+4 in the releasing agent is 80% by mass or more based on the total mass of the hydrocarbon component of the releasing agent. An amount of a component having a carbon number of N?10 or less in the releasing agent is 0.05% by mass or less based on the total mass of the hydrocarbon component of the releasing agent, and an amount of a component having a carbon number of N+10 or more in the releasing agent is 0.05% by mass or less based on the total mass of the hydrocarbon component of the releasing agent.

Abstract: A toner for electrophotography contains a binder resin and a coloring agent, and is characterized in that the binder resin contains a crystalline polyester resin, and a low-molecular compound having at least one of a naphthalene skeleton and a biphenyl skeleton, and the crystalline polyester resin contains 0.5 to 30 construction mole % of an aromatic dicarboxylic acid-derived constitutional component. Further, a developer for electrophotography and an image forming method using the toner for electrophotography are disclosed.

Abstract: An electrophotographic toner contains a resin, a colorant and a releasing agent. The releasing agent has a solidifying point of from 79° C. to 109° C., and one peak in an endothermic curve measured by a differential scanning calorimeter. A difference between temperature to give a maximum endothermic peak of the releasing agent and an end-set temperature of the releasing agent is within 10° C. A melt viscosity of the releasing agent at 110° C. is in a range of from 4 mPa·s to 9 mPa·s. The releasing agent in one particle of the toner forms 3 or more domains. Domains having a ratio of a major axis to a minor axis which is in a range of from 5 to 15 occupy 90% or more by number based on the total number of domains.

Abstract: The present invention provides a toner for developing an electrostatic latent image comprising of: toner particles containing at least a binder resin, a colorant and a releasing agent; wherein a volume-average particle diameter of the toner particles is in a range of about 5 to 8 ?m; an average of shape factor SF1 of the toner particles is in a range of about 125 to 140; and an arithmetical mean undulation height of the surface of the toner particles at the 90% point on the cumulative distribution curve is in a range of about 0.15 to 0.25 ?m. Further, the present invention provides an electrostatic latent image developer containing the toner. The invention also provides a method for producing the toner.

Abstract: The present invention provides a toner for electrophotography having a capsule structure including a core and a shell that covers the core, wherein the core contains a colorant, a releasing agent, an amorphous resin, and a block polymer containing a crystalline part and an amorphous part, the weight-average molecular weight of the block polymer is 10,000 or more, the weight-average molecular weight of the resin used in formation of the amorphous part of the block polymer is 1000 to 5000, and the weight-average molecular weight of the resin used in formation of the crystalline part of the block polymer is at least 2 times the weight-average molecular weight of the resin used in formation of the amorphous part of the block polymer, a method of manufacturing the same, a developer for electrophotography including the toner and a carrier, and an image forming method using the developer for electrophotography.

Abstract: Provided are a toner for developing an electrostatic image comprising a crystalline resin having an ester bond and at least one of a sulfide bond or a disulfide bond in the main-chain, an electrostatic image developer and an image-forming process by using the same, a method of producing the toner for developing electrostatic image, and a resin particle dispersion using the same.

Abstract: A toner for electrophotography contains a binder resin and a coloring agent, and is characterized in that the binder resin contains a crystalline polyester resin, and a low-molecular compound having at least one of a naphthalene skeleton and a biphenyl skeleton, and the crystalline polyester resin contains 0.5 to 30 construction mole % of an aromatic dicarboxylic acid-derived constitutional component. Further, a developer for electrophotography and an image forming method using the toner for electrophotography are disclosed.

Abstract: A toner for developing an electrostatic latent image includes a binder resin, a colorant and a releasing agent. The releasing agent contains a hydrocarbon component including a linear hydrocarbon component, and the liner hydrocarbon component has a carbon number distribution and an average carbon number N. An amount of a component having a carbon number of from N?4 to N+4 in the releasing agent is 80% by mass or more based on the total mass of the hydrocarbon component of the releasing agent. An amount of a component having a carbon number of N?10 or less in the releasing agent is 0.05% by mass or less based on the total mass of the hydrocarbon component of the releasing agent, and an amount of a component having a carbon number of N+10 or more in the releasing agent is 0.05% by mass or less based on the total mass of the hydrocarbon component of the releasing agent.

Abstract: The present invention provides a toner for developing an electrostatic latent image comprising of: toner particles containing at least a binder resin, a colorant and a releasing agent; wherein a volume-average particle diameter of the toner particles is in a range of about 5 to 8 ?m; an average of shape factor SF1 of the toner particles is in a range of about 125 to 140; and an arithmetical mean undulation height of the surface of the toner particles at the 90% point on the cumulative distribution curve is in a range of about 0.15 to 0.25 ?m. Further, the present invention provides an electrostatic latent image developer containing the toner. The invention also provides a method for producing the toner.

Abstract: An electrophotographic toner contains a resin, a colorant and a releasing agent. The releasing agent has a solidifying point of from 79° C. to 109° C., and one peak in an endothermic curve measured by a differential scanning calorimeter. A difference between temperature to give a maximum endothermic peak of the releasing agent and an end-set temperature of the releasing agent is within 10° C. A melt viscosity of the releasing agent at 110° C. is in a range of from 4 mPa.s to 9 mPa.s. The releasing agent in one particle of the toner forms 3 or more domains. Domains having a ratio of a major axis to a minor axis which is in a range of from 5 to 15 occupy 90% or more by number based on the total number of domains.

Abstract: A toner for developing an electrostatic image is provided, which contains at least a binder resin, a colorant and a releasing agent, the releasing agent, has an endothermic peak temperature measured by a differential scanning calorimeter of from 60 to 100° C., and an endothermic amount a of the releasing agent per unit weight (J/g) at temperatures equal to or lower than a glass transition onset temperature of the binder resin measured by a differential scanning calorimeter, a total endothermic amount b of the releasing agent per unit weight (J/g) and a volume average particle diameter c (?m) of the toner has the relationship: 0.05?a/(b×c)?0.6.

Abstract: An electrophotographic toner excellent in coloring property, fixing property, OHP transmittance and charging property, a process for producing the same, and a two-component developer are provided. The electrophotographic toner contains at least a binder resin, a colorant, a releasing agent and inorganic fine particles, in which the toner has a conglobation degree of about from 100 to 130, the releasing agent has an average particle diameter of about from 0.1 to 1 &mgr;m, a ratio of a major axis and a minor axis of about from 1.1 to 10, and the inorganic particles are dispersed in the toner particles.

Abstract: An electrophotographic toner excellent in coloring property, fixing property, OHP transmittance and charging property, a process for producing the same, and a two-component developer are provided. The electrophotographic toner contains at least a binder resin, a colorant, a releasing agent and inorganic fine particles, in which the toner has a conglobation degree of about from 100 to 130, the releasing agent has an average particle diameter of about from 0.1 to 1 &mgr;m, a ratio of a major axis and a minor axis of about from 1.1 to 10, and the inorganic particles are dispersed in the toner particles.

Abstract: A colorant in a toner comprising a binder resin and a colorant is dispersed by a dispersant polymer having an acid value of from 1 mgKOH/g or more to 27 mgKOH/g or less and an amine value of from 1 or more to 100 or less. Thus, dispersibility of the colorant in the toner is improved, so as to obtain a negatively chargeable toner for electrophotography having excellent chargeability, storage ability, color developability, and light transmittance through OHP transparencies.