Canon Kabushiki Kaisha

Harumi Takada

Yoshihiro Nakagawa

Naoya Isono

Reo Tagawa

Masatake Tanaka

Katsuyuki Nonaka

Takashi Kenmoku

Yuhei Terui

Hitoshi Itabashi

Tsuneyoshi Tominaga

Akane Masumoto

Taiji Katsura

Yasushi Katsuta

Koji Abe

Shiro Kuroki

Sara Yoshida

Dai Nozaki

Yuichi Yajima

Kohei Mizushima

Provided is a toner having a toner particle containing a binder resin and a wax, wherein the wax concentrations near the outermost surface of the toner and in the surface layer region below the outermost surface are controlled, so that the wax moves with high efficiency to near the outermost surface during heating.

Toner

A toner comprising a toner particle that contains a binder resin and a wax, wherein in a cross sectional image of the toner observed with a transmission electron microscope, the toner satisfies the following formulas (1) and (2)18.0%&#x2265;&#x2265;1.5%&#x2003;&#x2003;(1)10.0&#x2265;&#x2265;2.0&#x2003;&#x2003;(2)where As represents the proportion for the area taken up by the wax present in the surface layer region having distance 1.0 &#x3bc;m in a radial direction inward from the surface of the toner, and Ac represents the proportion for the area taken up by the wax present in the inner region positioned further inside than the surface layer region.

Toner and method of producing toner

Provided is a toner including a toner particle containing a graft polymer, in which: the graft polymer has a crystalline polyester segment and an amorphous vinyl polymer segment; the crystalline polyester segment has a unit derived from a specific monomer (a) and a unit derived from a specific monomer (b); a content X (mol %) of the unit derived from the monomer (b) calculated from a specific formula is 1.0 mol % or more and 24 mol % or less; and a melting point of the graft polymer is 50&#xb0; C. or more and 85&#xb0; C. or less.

Toner and production method thereof

Provided is a toner, including a toner particle containing: a binder resin containing a styrene acrylic resin as a main component, a colorant, a hydrocarbon wax, and a wax dispersant, in which: the wax dispersant includes a polymer of a vinyl resin component and a hydrocarbon compound, the vinyl resin component including styrene and one or more kinds of vinyl-based polymerizable monomers except a styrene derivative; and a solubility parameter of the binder resin (A) a solubility parameter of the vinyl resin segment of the wax dispersant (C), and a solubility parameter of the hydrocarbon compound segment of the wax dispersant (D) satisfy the formulae (1) and (2).||&#x2266;0.20&#x2003;&#x2003;(1)&#x3c;1.65&#x2003;&#x2003;(2)

A toner contains a styrene acrylic resin, a block polymer, and an organosilicon polymer, in which the organosilicon polymer has a specific partial structure, the block polymer has a polyester segment and a vinyl polymer segment, the melting point is 55&#xb0; C. or more and 90&#xb0; C. or less, the mass ratio of the polyester segment to the vinyl polymer segment is 40/60 to 80/20, and the polyester segment has a specific unit.

Toner and method for producing toner

Provided is a toner that has satisfactory chargeability and hardly causes a reduction in image density, fogging, and density unevenness in various environments ranging from a low-temperature and low-humidity environment to a high-temperature and high-humidity environment. The toner includes toner particles obtained by fixing resin particles to toner base particles each containing resins, in which: the resins contain 50.0 mass % or more of a styrene-acrylic resin and 1.0 to 40.0 mass % of a polyester resin A; the polyester resin A contains 0.10 to 30.00 number % of an isosorbide unit; the fixing amount of the resin particles to the toner base particles is from 0.1 to 5.0 parts by mass with respect to 100 parts by mass of the toner base particles; and the glass transition temperature of the resin particles is higher than the glass transition temperature of the toner base particles.

A toner having a toner particle including a binder resin, wherein the binder resin includes a styrene acrylic resin and a vinyl-modified crystalline polyester resin, the vinyl-modified crystalline polyester resin has a crystalline polyester segment having structures of following i) or a structure of following ii),

The present invention provides a toner having a toner particle that contains a binder resin, wherein the binder resin contains a vinylic resin and a polyester resin, the vinylic resin contains an organic silicon polymer having a specific structure, the organic silicon polymer is contained in the surface layer of the toner particle, the proportion of a silicon atom in the organic silicon polymer having a specific structure is at least 5%, the polyester resin is a specific polymer, and the toner particle contains a specific amount of the polyester resin.

To obtain a toner which has excellent charge rise and stability, tends to have a sharp charge distribution, has excellent pigment dispersion properties, exhibits no disarray in an image even during a high-speed copying operation, and can stably output high-resolution images. A toner comprising toner particle containing a binder resin, a colorant, resin PA, and resin PB, wherein the resin PA has unit A represented by Formula (1), the resin PB has unit B represented by Formula (2), a content 'a' of the unit A in the toner particle is 2.00 &#x3bc;mol/g or more, and a molar ratio b/a of the content 'a' and a content &#x201c;b&#x201d; of the unit B in the toner particle is 0.10 or more and 10.00 or less.

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Susono, Japan

Harumi Takada