Canon Kabushiki Kaisha

Naoya Isono

Masatake Tanaka

Katsuyuki Nonaka

Masao Suzuki

Akira Sugiyama

Yoshihiro Nakagawa

Yuhei Terui

Tsutomu Shimano

Yu Yoshida

Koji Abe

Shintaro Noji

Yasuhiro Hashimoto

Harumi Takada

Kenichi Nakayama

Hirofumi Kyuushima

Taiji Katsura

Reo Tagawa

Yasuaki Murai

Keiichiro Tsubaki

Takayuki Toyoda

Satoshi Handa

Yoshiaki Shiotari

Tomoya Nagaoka

Mai Kato

Takeshi Kaburagi

Shiro Kuroki

Sara Yoshida

Toshihiko Katakura

Shinsuke Mochizuki

Dai Nozaki

Shintaro Kawaguchi

Shohei Shibahara

Yuichi Yajima

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 and a silica particle on a surface of the toner particle, wherein an area formed by a polyester resin and an area formed by a styrene-acrylic resin are present on the surface of the toner particle; the silica particle has the number-average particle diameter of 15 to 60 nm; the silica particle has the average pore diameter of 5.0 to 20.0 nm; and the silica particle has the total pore volume of 0.20 to 1.50 cm/g.

A toner comprises a toner particle comprising a core particle comprising a resin component, a shell coating the surface of the core particle, and a polyvalent metal. The resin component comprises a polyester resin, and the shell comprises an amino resin; in an electron image of a cross section of the toner acquired using a transmission electron microscope, a polyvalent metal content P(M) obtained by energy-dispersive x-ray analysis at the core/shell interface and in the vicinity of this interface is 0.0010 to 2.00 atomic %; and the surface storage elastic modulus of the toner at a load of 30 μN at 25° C., according to nanoindentation measurement of the toner, is from 6.50 GPa to 12.00 GPa.

The toner includes a toner particle that comprising a core particle containing a resin component and a shell on a surface of the core particle, wherein the resin component comprises more than 50.0 mass % of a polyester resin comprising a monomer unit that contains a heterocyclic group, and the shell comprises at least one resin selected from the group consisting of prescribed (meth)acrylic resins and melamine resins.

The toner has a toner particle that contains a binder resin, wherein the binder resin contains a styrene-acrylic resin that has a structure derived from a crosslinking agent, the binder resin includes tetrahydrofuran-insoluble matter in an amount of from 5 mass % to 60 mass % of the binder resin, and the crosslinking agent contains a polymeric compound provided by an addition reaction at least between a particular multifunctional (meth)acrylate compound and a particular polyvalent mercapto compound.

Toner and method for producing toner

The toner contains a toner particle that has a binder resin, wherein an amount of a tetrahydrofuran THF-insoluble matter A collected when a THF dispersion of the binder resin is passed through a first filter having an average pore diameter of 8 &#x3bc;m, is not more than 10 mass % of the binder resin, and an amount of a THF-insoluble matter B collected when the THF dispersion that has been passed through the first filter is passed through a second filter having an average pore diameter of 0.8 &#x3bc;m, is from 5 mass % to 50 mass % of the binder resin.

Toner having a toner particle with a binder resin containing a copolymer of a styrenic polymerizable monomer, and at least one of an acrylic or methacrylic polymerizable monomer

Provided is a toner having a toner particle that contains a binder resin and a wax, wherein the solubility parameter Sof the binder resin is at least 9.4 and not more than 10.0; the binder resin contains a resin having a structure represented by the following formula (1) in the terminal position on a main chain of the resin,*&#x2014;CO&#x2014;R&#x2003;&#x2003;formula (1)(in formula (1), R represents a phenyl group or a derivative thereof, or &#x2014;COOR, Rrepresents an alkyl group having 1 to 4 carbons, and * represents a bond to the main chain of the resin); the solubility parameter Sof the wax is at least 8.1 and not more than 9.0; and Sand Ssatisfy formula (2),||&#x3e;0.5&#x2003;&#x2003;formula (2).

Toner and method of producing toner

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.

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.

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.

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&#x2266;V&#x2266;1.10.

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.

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Suntou-gun, Japan

Naoya Isono