Canon Kabushiki Kaisha

Koh Ishigami

Takeshi Yamamoto

Yoshinobu Baba

Kentaro Kamae

Takayuki Itakura

Masaharu Miura

Hiroyuki Fujikawa

Naoki Okamoto

Yuichi Mizo

Takeshi Ohtsu

Yosuke Iwasaki

Wakiko Katsumata

Nozomu Komatsu

Ryuichiro Matsuo

Hitoshi Sano

Kenta Kubo

Kenta Mitsuiki

Nobuyoshi Sugahara

Takaho Shibata

Tomoko Endo

Kunihiko Nakamura

Takakuni Kobori

Tetsuya Ida

Yojiro Hotta

Noriyoshi Umeda

Hirohide Tanikawa

Daisuke Yamashita

Manami Haraguchi

Kazuo Terauchi

Ryo Nakajima

Chika Inoue

Toru Takahashi

Hiroaki Kawakami

Masayuki Hama

Yuu Nishimura

Yoshiaki Shiotari

Takeshi Naka

Kazunari Ooyama

Shin Kitamura

Daisuke Tsujimoto

Akira Hashimoto

Hironori Minagawa

Junichi Tamura

Hayato Ida

Kosuke Fukudome

Yasuhiro Ichikawa

Ryuji Murayama

Tomoaki Miyazawa

Katsuhiro Watanabe

Kazuhiko Hayami

Rei Hijikawa

Kazuki Murata

Kohji Takenaka

Satoshi Mita

Juun Horie

Hirokazu Usami

Jumpei Shirono

Takeshi Ootsu

Kazuo Uchida

A toner includes toner particles containing a binder resin, a colorant, and inorganic fine particles, in which in a depth profile of an element distribution in a depth region from the outermost surface of a particle to a depth of 500 nm the depth profile being obtained by an element analysis performed by X-ray photoelectron spectroscopy using the toner as a sample, two or more minimum points of a concentration of a carbon element in the depth region exist, a concentration of an inorganic element becomes a maximum value at a depth position corresponding to each of the minimum points, and the inorganic element is an element derived from the inorganic fine particle.

Toner

A toner comprising a toner particle containing a binder resin containing at least 50 mass % of a polyester resin, wherein the polyester resin contains a polyester resin A having a silicone segment, and in XPS analysis, when X is a ratio of the number of silicon atoms attributable to silicone segments relative to a total number of measured atoms, X1 is a value of the X on the toner particle surface, X2 is a value of the X at a depth of 30 nm from the surface, Z is a ratio of the number of carbon atoms attributable to ester bonds relative to a total number of measured atoms, Z1 is a value of the Z on the toner particle surface and Z2 is a value of the Z at a depth of 30 nm from the toner particle surface, X1, Z1, X2 and Z2 satisfy a specific relationship.

A toner comprising a toner particle comprising a binder resin including a polyester resin, and a polyolefin resin having a sulfonic acid group, wherein the polyolefin resin having a sulfonic acid group is a polymer in which a vinyl polymer is bonded to a polyolefin, a content ratio of a monomer unit containing a sulfonic acid group in the vinyl polymer is from 1.0 mass % to 20.0 mass %, in a FT-IR spectrum obtained through measurement of a large particle size toner and a small particle size toner resulting from dividing, on a number basis, the toner into two substantially equal parts, a ratio of an intensity of a maximum absorption peak in a range from 1130 cmto 1170 cmwith respect to an intensity of a maximum absorption peak in a range from 1713 cmto 1723 cmexhibits a specific relationship.

A toner including a toner particle comprising a binder resin and a crystalline polyester, wherein the binder resin contains a polyester having a structure represented by the following formula (1): in formula (1), Rs each independently represent hydrogen, a methyl group, or a phenyl group;A represents a polyester segment;B represents a polyester segment or any functional group selected from the group consisting of &#x2014;ROH, &#x2014;RCOOH, and &#x2014;RNHwherein Rrepresents a single bond or a Calkylene group; andthe average repeat number n is 10 to 80.

A toner containing a toner particle that contains a binder resin including a polyester resin, and a polyolefin resin having &#x2014;COOM that is a neutralized carboxy group with a monovalent metal ion M, wherein the polyolefin resin having &#x2014;COOM is a polymer in which a vinyl polymer is bonded to a polyolefin, a content of a monomer unit containing &#x2014;COOM in the polyolefin resin having &#x2014;COOM is 1 to 20 mass %, and in a FT-IR spectrum obtained through measurement of a large particle size-side particle group and a small particle size-side particle group obtained by dividing the toner into two substantially equal parts, on a number basis, a ratio of the intensity of a maximum absorption peak in a range from 1545 cmto 1555 cmwith respect to the intensity of a maximum absorption peak in a range from 1713 cmto 1723 cmexhibits a specific relationship.

Toner and method of producing toner

A toner that is suppressed from deteriorating owing to its long-term use and can maintain high transferability. The toner includes: a toner particle containing an amorphous polyester serving as a binder resin and a polymer A; and inorganic fine particles, wherein the polymer A includes a graft copolymer of a polyolefin and a vinyl-based polymer unit having a carboxylate anion group, and a metal ion having a valence of 2 or more.

A toner includes a toner particle containing a binder resin and a silica fine particle A on a surface of the toner particle, wherein D50 on a number basis of the toner is 3.0 to 6.0 the silica fine particle A is a particle having a particle diameter of 80 to 500 nm, the particle diameter being confirmable by observing the toner with a SEM, and when the average coverage with the silica fine particle A determined by image analysis of a particle group of a small particle diameter side of the toner with a SEM is set to Sand the average coverage with the silica fine particle A determined by image analysis of a particle group of a large particle diameter side of the toner with a scanning electron microscope is set to S, Sis 20 to 70 area %, Sand Ssatisfy S/S&#x2264;0.80.

A toner comprising a toner particle including a binder resin and a crystalline polyester resin, wherein the binder resin is an amorphous polyester resin having a linear alkyl group at a molecular chain terminal; the crystalline polyester resin is a polycondensate of a diol and a dicarboxylic acid; the number of carbon atoms Cof the linear alkyl group, the number of carbon atoms Cof the diol, and the number of carbon atoms Cof the dicarboxylic acid, excluding carbon that belongs to carboxyl groups, satisfy the following relationships; and a glass transition temperature of the toner as measured by a differential scanning calorimeter is from 40.0&#xb0; C. to 55.0&#xb0; C.8&#x2264;C&#x2264;20&#x2003;&#x2003;(1)C/C&#x2265;3.5 and 0&#x2264;|C&#x2212;C|&#x2264;3&#x2003;&#x2003;(2)C/C&#x2265;3.5 and 0&#x2264;|C&#x2212;C|&#x2264;3&#x2003;&#x2003;(3)

Provided is a magenta toner having a magenta toner particle containing a binder resin, a colorant, a wax, a wax dispersant, and a crystalline polyester, wherein the wax dispersant is a graft polymer in which a styrene acrylic resin is grafted to a hydrocarbon compound, and the styrene acrylic resin has a monomer unit having a saturated alicyclic group, the colorant contains C.I. Pigment Red 32, and when observing a cross-section of the magenta toner particle using a transmission electron microscope (TEM), crystals of the crystalline polyester are dispersed in the cross-section, and the number average value of maximum lengths of the crystals is 50 nm or less.

Magenta toner and toner kit

A toner is provided, which is obtained by heat treating a toner particle containing a crystalline polyester resin, an amorphous polyester resin, a hydrocarbon wax and a wax dispersant, wherein the crystalline polyester resin is a hybrid resin having crystalline polyester segments and amorphous vinyl segments, and a mass ratio of crystalline polyester segments and amorphous vinyl segments in the crystalline polyester resin (crystalline segments/amorphous segments) is 70/30 to 98/2.

Toner and method for manufacturing toner

A toner production method including: a melt-kneading step of melt-kneading a resin composition including a binder resin, a colorant, a wax, and a wax dispersant to obtain a melt-kneaded product; and a pulverizing step of pulverizing the melt-kneaded product. Where the temperature of the melt-kneaded product at the end of the melt-kneading step is Tk (&#xb0; C.), and the softening point of the wax dispersant is Tm (&#xb0; C.), the relationship of &#x2212;18&#x2264;[Tk&#x2212;Tm]&#x2264;10 is satisfied. The wax dispersant is a polymer in which a styrene acrylic polymer is graft-polymerized to a polyolefin. The styrene acrylic polymer has a monomer unit derived from &#x3b1;-methylstyrene and a monomer unit derived from a cycloalkyl (meth)acrylate.

Toner production method and polymer

Provided is a toner including a toner particle containing an amorphous resin, a colorant, a release agent, and a crystalline resin, wherein, when &#x3b7;represents the extensional viscosity of the toner at a Hencky strain at 90&#xb0; C. of 0.01 and &#x3b7;represents the extensional viscosity of the toner at a Hencky strain at 90&#xb0; C. of 0.69, &#x3b7;and &#x3b7;satisfy the relationships of the following formulas (1) and (2):3.0&#xd7;10Pa&#x2264;&#x3b7;&#x2264;2.0&#xd7;10Pa&#x2003;&#x2003;formula (1)2.0&#x2264;[&#x3b7;/&#x3b7;].&#x2003;&#x2003;formula (2)

A toner having a toner particle containing an amorphous resin, a crystalline resin, a colorant, a release agent, and a polymer in which a styrene-acrylic polymer is graft-polymerized on a polyolefin, wherein the amorphous resin contains an amorphous polyester resin A, and the amorphous polyester resin A has a monomer unit derived from polyhydric alcohol and a monomer unit derived from polyhydric carboxylic acid, has, a particular amount of a succinic acid-derived monomer unit in the monomer unit derived from polyhydric carboxylic acid, and has, a particular amount of a monomer unit derived from a propylene oxide adduct on bisphenol A in the monomer unit derived from polyhydric alcohol; and has a particular softening point, a particular solubility parameter, and a particular peak molecular weight.

A toner having a toner particle that is produced through a step of melt-kneading a resin composition containing a binder resin, a colorant, a hydrocarbon wax, and a wax dispersing agent, cooling the obtained kneaded material, pulverizing the obtained cooled material, and heat treating the resulting resin particles, wherein the wax dispersing agent is a polymer provided by graft polymerizing a styrene-acrylic polymer onto a polypropylene, the styrene-acrylic polymer is a polymer having a monomer unit derived from a cycloalkyl (meth)acrylate, and specific relationships are satisfied where Mp(p) is the melting point (&#xb0; C.) of the polypropylene and Mp(w) is the melting point (&#xb0; C.) of the hydrocarbon wax.

Toner and method for producing toner

A wax dispersant for a toner including a polymer obtained by graft polymerization of a styrene-acrylic resin onto a hydrocarbon compound, wherein the styrene-acrylic resin has a structural segment derived from a saturated alicyclic compound, and a toner including a toner particle that contains a binder resin, a wax, and a polymer obtained by graft polymerization of a styrene-acrylic resin onto a hydrocarbon compound, wherein the styrene-acrylic resin has a structural segment derived from a saturated alicyclic compound.

Wax dispersant for toner and toner

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Mishima, Japan

Koh Ishigami