Canon Kabushiki Kaisha

Canon Finetech Inc.

Yasuaki Murai

Takayuki Toyoda

Masashi Hirose

Takeshi Miyazaki

Masashi Kawamura

Waka Hasegawa

Yuki Hasegawa

Ayano Mashida

Masatake Tanaka

Chiaki Nishiura

Masanori Seki

Kei Inoue

Yuki Tsujii

Taiki Watanabe

Yuko Yamagishi

Kosuke Mukumoto

Masayoshi Kato

Yutaka Tani

Taichi Shintou

Naoya Isono

Keiichiro Tsubaki

Norikazu Fujimoto

Kuniaki Fujimoto

Yuhei Terui

Kazuyuki Sato

Yu Yoshida

Ryuji Murayama

Kaoru Takahashi

Haruko Kubo

Masahiro Suenaga

Ryosuke Nagao

Saki Tasaki

Soichiro Kawakami

Masao Suzuki

Tomoya Yamamoto

Hitoshi Itabashi

Masakazu Matsumoto

Minako Kawabe

Hideki Yamakami

Osamu Matsushita

Yoshihide Aikawa

Shoji Umehara

Yoshio Kinoshita

Suzuka Ueno

Junko Chizuwa

Otome Mori

Kousuke Mukumoto

Provided is an aqueous ink capable of recording an image having a good hue as a magenta ink. The aqueous ink is an aqueous ink for ink jet including a first coloring material and a second coloring material. The first coloring material is a compound represented by general formula (1), and the second coloring material is a compound represented by general formula (2). A proportion (% by mass) of a content of the second coloring material to a total content of the first coloring material and the second coloring material in the aqueous ink is 0.60% by mass or more.

Aqueous ink, ink cartridge and ink jet recording method

Provided is an aqueous ink that excels in a hue as a yellow ink, and capable of recording an image that excels both in color developability and light fastness. The aqueous ink is an ink for inkjet, containing a first coloring material and a second coloring material. The first coloring material is a compound represented by general formula (1), and the second coloring material is a compound represented by general formula (2).

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

A compound that improves the dispersibility of pigments in non-water-soluble solvents is provided, the compound having a pigment dispersant, a pigment composition, a pigment dispersion, and a toner wherein the compound has a polymer and a monoazo compound having a certain structure binding to each other.

Compound having azo skeleton, pigment dispersant, pigment composition, pigment dispersion, and toner

The present invention provides a compound capable of improving the dispersibility of color pigments in a water-insoluble solvent; and a pigment-dispersing agent. The present invention also provides a pigment composition, a pigment dispersion, and a toner, which have satisfactory tinting strength. The present invention provides the compound containing a polymer having a monomer unit having a specific chemical structure, the compound having a moiety also having a specific structure.

Compound having azo skeleton structure, pigment-dispersing agent, pigment composition, pigment dispersion, and toner

The present invention provides a compound and a pigment dispersant, each of which improves the dispersibility of various types of pigments in a non-aqueous solvent and also provides a pigment composition, a pigment dispersion, and a toner, each of which has a preferable coloring power. The compound includes a polymer which has a monomer unit having a specific structure and also includes a specific partial structure.

Compound having azo skeleton structure, pigment dispersant, pigment composition, pigment dispersion, and toner

A toner having a toner particle that contains a binder resin, a pigment, a pigment dispersant, and a crystalline polyester, wherein the pigment dispersant has a specific pigment adsorption segment and a polymer moiety and a hydrophobic parameter HP1 for the pigment dispersant and a hydrophobic parameter HP2 for the crystalline polyester satisfy the formula &#x2212;0.28&#x2266;(HP1&#x2212;HP2)&#x2266;0.15.

Toner

A polymer including a unit having a phthalocyanine structure, the polymer having a high capability of dispersing pigments. A pigment composition, a pigment dispersion, and a toner all having a high tinting strength.

Polymer including phthalocyanine structure, method for producing the polymer, pigment composition, pigment dispersion, and toner

Provided are a method of producing a compound having a colorant structure suitable for a pigment dispersant, and a pigment dispersant, a pigment composition, a pigment dispersion, and a toner each containing the compound. The production method is a method of producing a compound in which a polymer portion and a colorant portion are bonded to each other through a linking group, the method including the steps of: (a) polymerizing a vinyl-based polymerizable monomer represented by the formula (A) with a radical initiator having a protective group by living radical polymerization to provide a polymer having the protective group at a terminal thereof; (b) hydrolyzing the protective group of the polymer having the protective group at a terminal thereof obtained by the step (a) to deprotect the polymer; and (c) bonding the deprotected polymer obtained by the step (b) and a colorant to each other through a covalent bond.

Method of producing a compound having a colorant structure, and toner containing a compound obtained by the production method

The present invention provides a compound capable of improving the dispersibility of yellow, magenta, cyan, and black pigments in a water-insoluble solvent and a pigment-dispersing agent. The present invention also provides a pigment composition, a pigment dispersion, and a toner, which have satisfactory tinting strength. The present invention relates to a compound having a structure in which an azo skeleton structure is bound to a polymer portion via a linking group in the azo skeleton structure.

A pigment dispersion containing a pigment, a non-water-soluble solvent, a compound in which an specific azo skeleton structure is bonded to a specific polymer having a monomer unit given, and a polymer compound having a monomer unit that contains a structure selected from the partial structures given by the specific formulas (3) and (4).

Pigment dispersion and toner

Provided is a compound that improves dispersibility of a pigment in a non-water-soluble solvent, and a pigment dispersing agent, a pigment composition, a pigment dispersion and a toner that use that compound. The present invention relates to a compound in which a polymer and a monoazo compound having a specific structure are bonded. The present invention further relates to a pigment dispersing agent, a pigment composition, a pigment dispersion and a toner containing that compound.

Compound, pigment dispersing agent, pigment composition, pigment dispersion and toner containing said compound

To provide a method for producing a compound that enhances dispersibility of a pigment of respective colors in a water-insoluble solvent, as well as a pigment dispersant, and a pigment composition, a pigment dispersion and a toner having a good tinting power. A method for producing a compound, including the following: (i): subjecting a polymerizable monomer forming a monomer unit represented by formula (1) to radical polymerization in the presence of a radical polymerization initiator and an iodine molecule to provide a polymer; and (ii): binding a colorant to a terminal of a main chain of the polymer: whereinRrepresents a hydrogen atom and an alkyl group, andRrepresents a phenyl group, a carboxyl group, an alkoxycarbonyl group or a carboxamide group.

Method for producing compound having colorant structure at main chain terminal of polymer, and pigment dispersant, pigment composition, pigment dispersion and toner containing compound obtained by the production method

Growing community of inventors

Kawasaki, Japan

Yasuaki Murai