Canon Kabushiki Kaisha

Masashi Hirose

Yasuaki Murai

Takayuki Toyoda

Takeshi Miyazaki

Waka Hasegawa

Masashi Kawamura

Yuki Hasegawa

Akio Kashiwazaki

Katsuhiro Shirota

Koichiro Nakazawa

Ayano Mashida

Chiaki Nishiura

Masanori Seki

Masatake Tanaka

Taichi Shintou

Yutaka Tani

Kaoru Takahashi

Kei Inoue

Satoshi Saito

Taiki Watanabe

Yoshihisa Yamashita

Masao Nakano

Takayuki Ujifusa

Yuki Tsujii

Kosuke Mukumoto

Kazuyuki Sato

Mayumi Yokoyama

Shoji Shiba

Ryuji Murayama

Masahiro Suenaga

Ryosuke Nagao

Koichi Suzuki

Soichiro Kawakami

Masao Suzuki

Toshio Tanaka

Tsuyoshi Nomoto

Tomoyuki Noda

Ryuji Higashi

Kohei Watanabe

Yasushi Takatori

Masayoshi Kato

Minako Kawabe

Taketoshi Okubo

Hideto Kuribayashi

Osamu Matsushita

Yoshihide Aikawa

Yasuhito Shimada

Kuniaki Fujimoto

Yuhei Nishimura

Yoshio Kinoshita

Norihiro Nishimura

Otome Mori

Kousuke Mukumoto

Provided is a toner external additive containing a base material, wherein the base material is surface-treated with an isocyanurate ring-bearing silane coupling agent, and a toner including a toner particle and a toner external additive on a surface of the toner particle, wherein the toner external additive is the aforementioned toner external additive.

Toner external additive and 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

Provided is a novel probe for a biological specimen for labelling by itself and clearly visualizing one of a specific cell and a specific cell organ in a living body, the probe having excellent spectral characteristics and exhibiting excellent storage stability. The probe for a biological specimen contains, as an active agent, at least one kind of compound represented by a general formula (I). 

Probe for a biological specimen and labelling method and screening method using the probe

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

To provide an azo compound which improves the dispersibility of an azo pigment in a non-water soluble solvent. The purpose is achieved by an azo compound having a specific structure in which a high molecular weight polymer unit is bonded.

Compound having azo skeleton and pigment dispersant, pigment composition, pigment dispersion, and toner containing the compound

There are provided a new compound which has the following general formula (1) and which is useful as a coloring material, an ink containing the compound, an ink cartridge containing the ink and an ink jet recording method including ejecting the ink from a recording head of an ink jet system to record an image on a recording medium. 

Compound, ink, ink cartridge and ink jet recording method

The invention provides a production process for a self-dispersible pigment, having a step of bonding a group Rin the following general formula (1) to a particle surface of a pigment by radical addition reaction induced by removal of a hydrogen atom from a compound represented by the general formula (1):HN&#x2550;N&#x2014;R&#x2003;&#x2003;(1)wherein Ris a group having at least one of an aliphatic group and an aromatic group and being substituted with at least one hydrophilic group selected from the group consisting of a carboxylic acid group, a sulfonic acid group, a phosphoric acid group and a phosphoric acid group.

Production process for self-dispersible pigment, self-dispersible pigment, ink, ink cartridge and ink jet recording method

An object of the present invention is to provide an azo compound capable of improving the dispersibility of an azo pigment in a non-water-soluble solvent. The object of the present invention is achieved with an azo compound wherein a coloring matter moiety having a diketone azo structure and a polymer are bonded to each other.

Azo compound, pigment dispersant containing the azo compound, pigment composition, pigment dispersion and toner

Growing community of inventors

Machida, Japan

Masashi Hirose