Canon Kabushiki Kaisha

Tomoya Nagaoka

Daisuke Yoshiba

Takashi Matsui

Koji Nishikawa

Yasuhiro Hashimoto

Yuujirou Nagashima

Masao Suzuki

Takayuki Toyoda

Tomohisa Sano

Kazuyuki Sato

Naoya Isono

Hirofumi Kyuushima

Yuta Komiya

Shuntaro Watanabe

Kozue Uratani

Shohei Tsuda

Hiroki Akiyama

Mariko Yamashita

Ryo Nagata

Hiroki Kagawa

Kazuki Kaneko

A toner comprising a toner particle comprising a binder resin, and an external additive, wherein the toner particle further comprises a monohydric aliphatic alcohol, the monohydric aliphatic alcohol has 8 to 18 carbon atoms, a content ratio of the monohydric aliphatic alcohol extracted from the toner with ethanol is 30 to 300 ppm by mass in the toner, and the external additive comprises at least one selected from the group consisting of hydrotalcite particles and alumina particles.

Toner

A toner comprising a toner particle comprising a binder resin, wherein the toner particle further comprises a compound represented by a following formula (1) and a pigment having a quinacridone structure;

A toner comprising: a toner particle that comprises a core particle comprising a binder resin, and a shell layer comprising a thermoplastic resin on a surface of the core particle; and organosilicon polymer particles on a surface of the toner particle, wherein a peak top molecular weight of the thermoplastic resin, according to measurement by gel permeation chromatography, is 30000 to 500000, a number-average primary particle diameter of the organosilicon polymer particles is 10 nm to 500 nm, and an absolute value of a difference (ΔSP) between an SP value (SP) of the organosilicon polymer particles and an SP value (SP) of the thermoplastic resin present in the shell layer is not more than 2.30.

A toner comprising a toner particle comprising a binder resin and organosilicon polymer particles on a surface of the toner particle, wherein the binder resin comprising an amorphous resin and a crystalline polyester resin, an absolute value |SP−SP| of a difference between an SP value (SP) of the organosilicon polymer particles and an SP value (SP) of the crystalline polyester resin is not more than 2.00 (cal/cm), and an amount of adsorbed water in the organosilicon polymer particles at a temperature of 30° C. and a humidity of 80% RH is not more than 20 mg/g.

A toner is provided, which has a toner particle that contains a binder resin, and organosilicon polymer particle on a surface of the toner particle. A methanol concentration a (vol %) of the organosilicon polymer particle in a wettability test and a methanol concentration b (vol %) of the toner particle in a wettability test satisfy Expression (I) below:||&#x2264;25&#x2003;&#x2003;(I), and

Provided is a positive-charging toner having a toner particle that contains a binder resin, the binder resin contains a polymer A having a first monomer unit derived from a first polymerizable monomer, and a second monomer unit derived from a second polymerizable monomer, the first polymerizable monomer is at least one selected from the group consisting of (meth)acrylic acid esters having a C18 to C36 alkyl group, the content of the first monomer unit in the polymer A is 5.0 to 60.0 mol % and the content of the second monomer unit is 20.0 to 95.0 mol %, SPof the first monomer unit and SPof the second monomer unit satisfy 3.00&#x2264;(SP&#x2212;SP)&#x2264;25.00, and the work function of the toner is 5.0 to 5.4 V.

Positive-charging toner

A toner including a toner particle that contains a binder resin and inorganic fine particles, wherein the binder resin contains a polymer A that includes a first monomer unit derived from a first polymerizable monomer and a second monomer unit derived from a second polymerizable monomer that is different from the first polymerizable monomer; the first polymerizable monomer is at least one selected from the group consisting of (meth)acrylate esters having an alkyl group having 18 to 36 carbons; the SP value of the first monomer unit and the SP value of the second monomer unit satisfy a specified relationship; each of the inorganic fine particles contains a substrate containing at least one inorganic element selected from metal elements and metalloid elements, and a coating layer; and the coating layer has a specified structure.

Toner and method of producing toner

A toner comprising a toner particle including a binder resin and a colorant and an external additive, wherein the external additive contains an external additive A having a Feret diameter of 60 to 200 nm, the external additive A is inorganic fine particles or organic-inorganic composite fine particles, adhesion index of the external additive A to the toner is 0.00 to 3.00, and penetration depth b and protrusion height c satisfy Relational expressions (1) and (2) below, where b (nm) denotes penetration depth of the external additive A, at a portion of the external additive A penetrating into the toner particle interior from the surface thereof, and c (nm) denotes a protrusion height of the external additive A at that portion, in an observation of an image resulting from image processing of a cross section of the toner using TEM;60&#x2264;&#x2264;200&#x2003;&#x2003;(1),0.15&#x2264;/()&#x2264;0.30&#x2003;&#x2003;(2).

A toner comprising a toner particle containing a resin component, wherein the resin component contains an amorphous polyester and a crystalline polyester, and in depth profile measurement of secondary ions on the toner particle surface by TOF-SIMS, given Ia(t) as the intensity of secondary ions derived from the amorphous polyester, Ic(t) as the intensity of secondary ions derived from the crystalline polyester, and I(t) as the total detected intensity of secondary ions derived from resin contained in the toner particle at a depth of t (nm) from the toner particle surface, the following formulae are satisfied within the range of 0&#x2264;t&#x2264;10:()&#x3e;()&#x3e;0.0000(()+())/()&#x2265;0.80and there is only one point of intersection between the depth profile curve of Ia(t) and Ic(t) within the range of 10&#x2264;t&#x2264;30.

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Tokyo, Japan

Tomoya Nagaoka