Abstract: A toner comprising a toner particle, the toner particle comprising a resin, wherein, where a chloroform-soluble component of the resin is analyzed by gradient LC analysis using acetonitrile as a poor solvent and chloroform as a good solvent for the chloroform-soluble component of the resin, a peak detected in a range of a ratio of chloroform in the mobile phase of 50.0 to 75.0% by volume and a peak detected in a range of a ratio of chloroform in the mobile phase of 75.0 to 95.0% by volume satisfy a specific relationship.

Abstract: A nonmagnetic toner comprises a nonmagnetic toner particle. The nonmagnetic toner particle comprises a crystalline resin A, an amorphous resin B, and a colorant. The crystalline resin A has a monomer unit (a). the amorphous resin B has a monomer unit (b). A content of the crystalline resin A in the nonmagnetic toner is 10.0 to 58.0 mass %. The sum of the contents of the crystalline resin A and the amorphous resin B in the nonmagnetic toner is 65.0 mass % or more. A content of the monomer unit (a) in the crystalline resin A is 50.0 to 100.0 mass %. Using SPA [(J/cm3)0.5] for a SP value of the crystalline resin A and using SPB [(J/cm3)0.5] for a SP value of the amorphous resin B, SPA and SPB satisfy 0.15?SPB?SPA?2.00.

Abstract: A magnetic toner comprising a toner particle, the toner particle comprising a magnetic body, a crystalline resin A, and an amorphous resin B. The crystalline resin A has a monomer unit (a). The amorphous resin B has a monomer unit (b). A content of the crystalline resin A in the toner is 6.2 to 77.0 mass %. The sum of contents of the crystalline resin A and the amorphous resin B in the toner is 30.0 mass % or more. A content of the monomer unit (a) in the crystalline resin A is 50.0 to 100.0 mass %. Using SPA [(J/cm3)0.5] for a SP value of the crystalline resin A and using SPB [(J/cm3)0.5] for a SP value of the amorphous resin B, SPA and SPB satisfy 0.15?SPB?SPA?2.00.

Abstract: A core-shell particle includes a core, and a shell on a surface of the core. The core includes a crystalline release agent. A value of a sum of a number-average value of Feret diameter of the core-shell particle and a standard deviation of the Feret diameter of the core-shell particle is 20 to 500 nm. The shell comprises an organosilicon polymer. In a differential scanning calorimetric measurement of the core-shell particle, a maximum endothermic peak is present when a temperature is raised from 30° C. to 120° C. at 10.0° C./min, a maximum exothermic peak is present when the temperature is lowered from 120° C. to 30° C. at 10.0° C./min, and Tc (° C.) is at least 5° C. lower than Tm (° C.) where Tm is a peak temperature of the maximum endothermic peak and Tc is a peak temperature of the maximum exothermic peak.

Abstract: A toner comprising a toner particle comprising a toner core particle and a shell covering the toner core particle, wherein the shell comprises an organosilicon polymer, the shell encapsulates a domain of a release agent, and in cross-sectional observation of the toner particle by a transmission electron microscope, a ratio of domains of the release agent that are not in contact with the toner core particle to a total number of the observed domains of the release agent is 85% by number or more.

Abstract: A toner comprising a toner particle, wherein the toner particle comprises a binder resin, the binder resin comprises a resin A and a resin B, the toner particle comprises protrusions on a surface thereof, each of the protrusions comprises the resin B, a shape factor SF-2 of the toner as observed under SEM is 105 to 120, and when the toner is observed under the SEM, a surface unevenness index of the toner as calculated by formula (1) below is 0.010 to 0.050: Surface unevenness index=(area of region surrounded by convex hull of toner?projected area of toner)/projected area of toner??(1).

Abstract: A toner comprising a toner particle that includes a binder resin, wherein in dynamic viscoelasticity measurement of the toner, the storage elastic modulus of the toner at 70° C. is from 0.10 MPa to 3.00 MPa, and in nanoindentation measurement of the toner, the surface storage elastic modulus of the toner at 25° C. under 150 ?N of load is from 2.80 GPa to 4.50 GPa.

Abstract: A toner comprising a toner particle comprising a core particle comprising a binder resin, and a shell on a surface of the core particle, wherein the shell comprises an oxazoline group and a polyvalent metal, and in an electron image of a cross-section of the toner particle taken with a transmission electron microscope, the polyvalent metal has atomic concentration C(M) of 0.0010 to 0.5000 atomic % as measured by energy dispersive X-ray analysis of the shell.

Abstract: A toner comprising a toner particle, wherein the toner particle comprises a binder resin, the binder resin comprises a resin A and a resin B, the toner particle comprises protrusions on a surface thereof, each of the protrusions comprises the resin B, a shape factor SF-2 of the toner as observed under SEM is 105 to 120, and when the toner is observed under the SEM, a surface unevenness index of the toner as calculated by formula (1) below is 0.010 to 0.050: Surface unevenness index=(area of region surrounded by convex hull of toner?projected area of toner)/projected area of toner??(1).

Abstract: A toner comprising a toner particle that includes a binder resin, wherein in dynamic viscoelasticity measurement of the toner, the storage elastic modulus of the toner at 70° C. is from 0.10 MPa to 3.00 MPa, and in nanoindentation measurement of the toner, the surface storage elastic modulus of the toner at 25° C. under 150 ?N of load is from 2.80 GPa to 4.50 GPa.

Abstract: The present invention provides a toner that exhibits an excellent colorant dispersibility and hence maintains the formation of a high-quality image, that is capable of low-temperature fixing, and that has a satisfactory heat-resistant storability and a satisfactory durability, in which the toner comprising a toner particle that contains a colorant and a binder resin containing a styrene-acrylic resin and a crystalline resin, wherein a compatibility parameter (V) between the styrene-acrylic resin and the crystalline resin satisfies 0.40?V?1.10.

Abstract: Provided is a toner for which the heat-resistant storability and the low-temperature fixability are able to co-exist at higher levels and for which the temporal stability of the low-temperature fixability is also excellent. The toner has a toner particle that contains a binder resin and a pigment, and this binder resin contains a polyester resin that has a specific structure and specific properties.

Abstract: The present invention relates to a toner having a toner particle containing a binder resin containing a styrene acrylic resin and a block polymer, wherein the block polymer has a polyester segment and a vinyl polymer segment and has a melting point of 55° C. to 90° C., the polyester segment has a specific structure and a solubility parameter (SP) value of 9.40 to 9.85, and the vinyl polymer segment has a weight-average molecular weight (Mw) of 4000 to 15000.

Abstract: A toner particle production method has an annealing step that is performed after the preparation of a resin solution by the dissolution or dispersion, in an organic solvent, of a binder resin having a polyester resin as its major component and a block polymer having a polyester segment and a vinyl polymer segment, and the preparation of a resin particle dispersion in which resin particles are dispersed by a dissolution suspension method, wherein, in this annealing step, the temperature of the obtained resin particle dispersion is held for at least 60 minutes in the temperature range from TgA-15 (° C.) to TmA (° C.), and under the conditions of a temperature variation range of not more than 20° C. and a temperature variation rate of not more than 0.35° C./minute.

Abstract: It is an object of the present invention to provide a toner capable of being fixed at low energy and forming an image with high resistance to external forces, such as rubbing and scratching. The object is achieved by a toner including toner particles that contain a binder resin and a colorant, a sea-island structure including a sea portion composed of the crystalline resin C serving as a main component and island portions composed of the amorphous resin A serving as a main component is observed at the observation of a cross section of each of the toner particles.

Abstract: A toner that comprises a toner particle that contains a binder resin that contains a styrene-acrylic resin and a block polymer, wherein the block polymer has a polyester segment and a vinyl polymer segment; the polyester segment is obtained by condensation polymerization of: a monomer (a) selected from a group consisting of a prescribed monomer group A; and a monomer (b) selected from a group consisting of a prescribed monomer group B, and the content in the polyester segment of the substructure originating with the monomer (b) as calculated from the following formula is from at least 1.0 mol % to not more than 30.0 mol %: {monomer (b) [mol]/(monomer (a) [mol]+monomer (b) [mol])}×100.

Abstract: The present invention relates to a toner including a toner particle containing a binder resin, wherein the binder resin contains a block polymer and a styrene-acrylic resin, the block polymer has a vinyl polymer segment and a polyester segment, the polyester segment has a branch structure and the block polymer has a melting point of 50° C. to 95° C.

Abstract: A toner containing a toner particle containing a binder resin, wherein the binder resin contains a styrene-acrylic resin and a crystalline resin, and the crystalline resin is a block polymer or a graft polymer in which the mass ratio between the crystalline segment and an amorphous segment is 30:70 to 90:10, and wherein, in the total heat flow measured for the binder resin by a temperature-modulated differential scanning calorimeter, the peak temperature of an endothermic peak is from 55.0° C. to 90.0° C., and the percentage of the endothermic quantity of the endothermic peak in the reversing heat flow with respect to the endothermic quantity of the endothermic peak in the total heat flow is from 0.0% to 35.0%.

Abstract: Provided is a toner for which the heat-resistant storability and the low-temperature fixability are able to co-exist at higher levels and for which the temporal stability of the low-temperature fixability is also excellent. The toner has a toner particle that contains a binder resin and a pigment, and this binder resin contains a polyester resin that has a specific structure and specific properties.

Abstract: A method for producing toner particles that contain a binder resin having a styrene-acrylic resin as a main component, a colorant, and a block polymer that has polyester segments and vinyl polymer segments, has a step of producing resin particles in accordance with a suspension polymerization method or a dissolution suspension method, and thereafter, holding the temperature of the aqueous medium in which the resin particles are dispersed, for 60 minutes or more, between a glass transition point TgA (° C.) of the resin particles and an onset temperature TmA (° C.) of an endothermic peak derived from the block polymer in the resin particles, in such a manner that a temperature fluctuation rate not greater than 0.35° C./minute, and a temperature fluctuation range is not greater than 20° C.