Abstract: A chemically prepared toner composition made up of a toner particle with a core having a first polymer binder, a monomer free radical polymerization formed core shell styrene acrylic latex having a liquid gel core, a pigment, a wax, and a shell formed around the core including a second polymer binder and method to make the same is disclosed. An optional borax coupling agent can be placed between the outer surface of the core and the shell to assist in the binding of the polymer found in the shell onto the surface of the toner core containing the first polymer.

Abstract: A chemically prepared toner composition made up of a toner particle with a core having a first polymer binder, a monomer free radical polymerization formed core shell styrene acrylic latex having a liquid gel core, a pigment, a wax, and a shell formed around the core including a second polymer binder and method to make the same is disclosed. An optional borax coupling agent can be placed between the outer surface of the core and the shell to assist in the binding of the polymer found in the shell onto the surface of the toner core containing the first polymer.

Abstract: An electrostatic charge image developing carrier includes magnetic particles and a resin coating layer which covers the magnetic particles, wherein a sulfate ion concentration of the resin coating layer is 0.05% by weight or less with respect to a total weight of the resin coating layer, and when a total value of a molar amount of sulfate ions contained and a molar amount of sulfo groups contained per 1 g of the resin coating layer is A mol and a molar amount of sodium ions contained per 1 g of the resin coating layer is B mol, a relationship of 0.1<B/A<1.2 is satisfied.

Abstract: Environmentally friendly toner particles are provided which may include a bio-based amorphous polyester resin including camphoric acid, optionally in combination with a crystalline resin. Methods for providing these toners are also provided.

Abstract: A toner includes a binder resin including a copolymer resin containing structural units derived from crystalline and non-crystalline resins, respectively. Spin-spin relaxation time (t50) of the toner at 50° C. measured by pulse NMR is ?0.05 msec., spin-spin relaxation time (t130) at 130° C. when warmed from 50° C. to 130° C. is >15 msec., and spin-spin relaxation time (t?70) at 70° C. when cooled from 130° C. to 70° C. is ?1.00 msec. A binarized image obtained by binarizing a phase image of the toner observed by a tapping mode AFM based on intermediate value between maximum and minimum phase difference values in the phase image includes first phase difference images constituted by large phase-difference portions and a second phase difference image constituted by a small phase-difference portion. The first phase difference images are dispersed in the second phase difference image. The dispersion diameter of the first phase difference images is 150 nm or less.

Abstract: An image forming apparatus includes an image holding member, a first charging unit that charges a surface of the image holding member, a latent image forming unit that forms an electrostatic latent image on a charged surface of the image holding member, a second charging unit that charges a toner contained in a liquid developer, a developing unit that accommodates the liquid developer and develops the electrostatic latent image by using the liquid developer containing the toner charged by the second charging unit to form a toner image, a transfer unit that transfers the toner image to a recording medium, and a fixing unit that fixes the toner image to the recording medium. The liquid developer includes a toner in which a compound having a charge-accepting functional group has been bonded to a surface of toner particles, an ionization-controlling agent that ionizes the charge-accepting functional group, and a carrier liquid.

Abstract: A benzidine derivative is represented by general formula (1). In the general formula (1), R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 each represent, independently of one another, a hydrogen atom, a halogen atom, an optionally substituted alkyl group having a carbon number of at least 1 and no greater than 6, an optionally substituted alkoxy group having a carbon number of at least 1 and no greater than 6, or an optionally substituted aryl group having a carbon number of at least 6 and no greater than 14. n represents an integer of at least 0 and no greater than 2.

Abstract: A support, a conductive layer, and an intermediate layer of an electrophotographic photosensitive member have a particular surface profile. The intermediate layer is a cured film containing particles.

Abstract: A magnetic carrier is provided which can suppress a decrease in glossiness even in a long term use for POD which requires high glossiness. A magnetic carrier includes a filled core particle in which a silicone resin is filled in pores of a porous magnetic core particle and a vinyl resin coating a surface of the filled core particle. In a pore distribution of the porous magnetic core particle measured by a mercury intrusion method, a cumulative pore volume in a pore diameter range of 0.1 to 3.0 ?m is 35.0 to 95.0 mm3/g, and in a pore distribution of the filled core particle measured by a mercury intrusion method, a cumulative pore volume in a pore diameter range of 0.1 to 3.0 ?m is 3.0 to 15.0 mm3/g. The magnetic carrier includes 1.2 to 3.0 parts by mass of the vinyl resin to 100.0 parts by mass of the filled core particle.

Abstract: Provided is a toner having high coloring power and being excellent in light fastness. Specifically, provided is a yellow toner, including at least: a binder resin; a wax; and a colorant, in which the colorant contains a compound represented by the general formula (1).

Abstract: Provided are a method for producing a negatively-chargeable toner that has a narrow particle diameter distribution even when produced by a polymerization method, and a negatively-chargeable toner that is excellent in balance between low-temperature fixability and heat-resistant shelf stability, has fine thin-line reproducibility, and generates little fog, even in high-speed printing. The negatively-chargeable toner includes colored resin particles which contain at least a binder resin, a colorant, a charge control agent and a softening agent, wherein the charge control agent is a copolymer which is obtained by copolymerizing a vinyl aromatic hydrocarbon, a (meth)acrylate and a sulfonic acid group-containing (meth)acrylamide and in which a copolymerization ratio of the sulfonic acid group-containing (meth)acrylamide is 0.8 to 4.0% by mass, and wherein the softening agent is at least one of a monoester compound and a polyglycerol ester compound.

Abstract: There is provided an electrostatic charge image developing toner containing: a toner particle containing an amorphous resin having a polyester resin segment and a styrene acrylic resin segment, and a crystalline polyester resin dispersed in the amorphous resin, wherein a loss modulus G? of the toner particles satisfies the following (1) and (2): (1) the loss modulus G? at 40° C. is from 1.0×107 Pa to 1.0×108 Pa; and (2) the loss modulus G? at the time when 60 minutes has passed from start of keeping the toner particles at 55° C. is from 1.0×108 Pa to 1.0×109 Pa.

Abstract: Provided is a decolorizable toner including a binder resin and colorant particles which contain a color developable compound, a color developing agent, and a decolorizing agent, and have a capsule structure coated with an outer shell, wherein the binder resin is contained in an amount of 60 to 80% by mass with respect to the total amount of the toner components.

Abstract: In a positively chargeable single-layer electrophotographic photosensitive member, a photosensitive layer contains at least a hole transport material, and particles of a first resin. A compound represented by general formula (1) is contained as the hole transport material. In the general formula (1), R1 represents an alkyl group having a carbon number of at least 2 and no greater than 4. R2, R3, R4, R5, and R6 each represent, independently of one another, a hydrogen atom or an alkyl group having a carbon number of at least 1 and no greater than 4. Ar1 and Ar2 each represent, independently of each other, a hydrogen atom or an optionally substituted aryl group having a carbon number of at least 6 and no greater than 20. At least one of Ar1 and Ar2 represents an optionally substituted aryl group having a carbon number of at least 6 and no greater than 20.

Abstract: Provided is a magnetic carrier, including: a ferrite core particle; and a coating resin, in which: the coating resin has a surface resin layer and a resin composition in the stated order from a surface side thereof; the resin composition contains a resin, and an inorganic particle or carbon black that is subjected to a hydrophilic treatment; the surface resin layer contains a resin, is free of the inorganic particle or the carbon black, and has a thickness of from 0.01 ?m or more to 4.00 ?m or less; and a moisture percentage change between a moisture percentage when the magnetic carrier is left to stand under an environment of 30° C. and 80% RH for 24 hours, and a moisture percentage when the magnetic carrier is left to stand under an environment of 23° C. and 5% RH for 24 hours after the standing is 0.030 mass % or less.

Abstract: An undercoat layer of an electrophotographic photosensitive member includes a binder resin, and a complex particle composed of a core particle coated with tin oxide doped with zinc.

Abstract: Provided is a toner having good endurance stability and good low-temperature fixability in high-speed printing, and having good resistance to the adhesion of printed paper. The toner is a magnetic toner having, on the surface of toner particle containing a binder resin and an ester compound as a releasing agent, inorganic fine particle “a” and organic-inorganic composite fine particle having a volumetric specific heat of from 2,900 kJ/(m3·° C.) to 4,200 kJ/(m3·° C.), in which a coverage A of the surface of the toner particle with the inorganic fine particle “a” is 45.0% or more and 70.0% or less.

Abstract: There is provided a resin composition containing an infrared absorber as an inner salt, at least either a carboxylic acid ester or a phosphoric acid ester, and a resin; and an image forming material containing an infrared absorber as an inner salt, at least either a carboxylic acid ester or a phosphoric acid ester, and a thermoplastic resin.

Abstract: An electrophotographic photosensitive member includes a single-layer type photosensitive layer including phthalocyanine or a derivative thereof and an electron transport material. The electron transport material includes at least one first compound represented by formula (1) or (2) shown below and at least one second compound represented by formula (3), (4), or (5) shown below. A total amount of the at least one first compound and the at least one second compound is no less than 60 parts by mass and no greater than 120 parts by mass relative to 100 parts by mass of the binder resin. An amount of the at least one first compound is no less than 35 parts by mass and no greater than 80 parts by mass. An amount of the at least one second compound is no less than 25 parts by mass and no greater than 40 parts by mass.

Abstract: A toner binder comprising a polyester, the end of which is partially esterified with a monocarboxylic acid and/or a monohydric alcohol, the polyhydric alcohol component of which comprises a C3 alkylene glycol (a21) and an aromatic-ring-bearing diol (a22) at an (a21)/(a22) molar ratio of 5/95 to 70/30, and which has an ester group concentration of 16 to 30 wt % and satisfies a specific relationship between the ester group concentration and the hydroxy value. The toner binder combines low-temperature fixability and storage stability under high-temperature conditions or heat-temperature and -humidity conditions, and exhibits excellent durability.