Canon Kabushiki Kaisha

Canon Medical Systems Corporation

Ryo Natori

Junji Ito

Ayano Mashida

Yasuhiro Aichi

Takeshi Miyazaki

Takeshi Sekiguchi

Waka Hasegawa

Jun Shirakawa

Takaho Shibata

Yuya Chimoto

Ryuji Higashi

Hayato Ida

Junichi Tamura

Takayuki Toyoda

Masayoshi Kato

Fumio Yamauchi

Keiichiro Tsubaki

Takashi Hirasa

Kengo Kanazaki

Sakae Suda

Motokazu Kobayashi

Masayuki Ikegami

Kazumichi Nakahama

Minako Nakasu

Keiko Yamagishi

Yutaka Tani

Norishige Kakegawa

Tetsushi Yamamoto

Masao Suzuki

To provide a method for producing a particle that can suppress non-specific adsorption without using BSA. A method for producing a particle, including: a first step of mixing a radically polymerizable monomer, an organic silane compound having a silicon atom to which an alkoxy group is bonded and having radical polymerizability, a radical polymerization initiator, a water-soluble polymer, and an aqueous medium to prepare an emulsion; and a second step of adding a specific reactive compound after the first step.

Particle and method for producing particle

The present disclosure provides a particle showing a small non-specific adsorption, having a reactive functional group for chemically bonding a ligand thereto, and being suitable for an agglutination method; a particle for the agglutination method having a ligand chemically bonded to the particle; a reagent, a kit and a method for detecting a target substance, each for in vitro diagnosis, each of which contains the particle. The particle includes a polymer having a unit having a linker A in a side chain, wherein when both terminals of the linker A are represented by X1 and X2, the linker A has a reactive functional group for chemically bonding a ligand thereto in one of X1 and X2; one of X1 and X2 includes an ester structure; and a sum of bonds between atoms linearly connecting X1 and X2 is 18 to 24 and the X1 and X2 contain CHor CH.

Particle, particle for agglutination method, and reagent, kit and detection method containing the same

Provided is a liquid developer containing a carrier liquid with an SP value of not more than 8.20, a toner particle that is insoluble in the carrier liquid, and a toner particle dispersing agent, wherein the toner particle contains a polyester resin with an acid value of from 5 mg KOH/g to 50 mg KOH/g, a number-average molecular weight of the polyester resin is from 3,500 to 20,000, the toner particle dispersing agent is a polymer having a primary amino group, an amine value of the polymer having the primary amino group is from 30 mg KOH/g to 200 mg KOH/g, and a ratio of a total number of acid groups in the polyester resin relative to a total number of amino groups in the polymer having the primary amino group is from 1.0 to 10.0.

Liquid developer and method for manufacturing liquid developer

A liquid developer comprising a carrier liquid, a toner particle insoluble in the carrier liquid, and a polymer having a primary amino group and soluble in the carrier liquid, wherein the toner particle comprises a polyester resin having an acidic group, an acid value of the polyester resin is at least 5 mg KOH/g, a pKa of the acidic group is not more than 3.4, and the polymer having a primary amino group has a primary amino group at a position other than the end of a main chain of the polymer, and method of producing thereof.

Liquid developer and method of producing liquid developer

A method for producing a liquid developer, the method including a step of producing a toner particle by applying a shear force to a mixture of a polyester resin A and B, and a toner particle dispersing agent in a liquid a, wherein the polyester resin A has a number-average molecular weight from 3,000 to 7,000, an acid value of at least 5, and a carboxy group; the polyester resin B has a number-average molecular weight from 4,000 to 20,000 and an acid value of not more than 2; the toner particle dispersing agent has a primary amino group and an amine value of at least 40; the mass ratio (B/(A+B)) for the polyester resin B is 0.3 to 0.9; and the following relationship is satisfied: SP value of liquid a&#x3c;SP value of the toner particle dispersing agent&#x3c;SP value of polyester resin B.

Method for producing liquid developer

A curable liquid developer production method that can efficiently produce a curable liquid developer is provided. A curable liquid developer is also provided. The method is a method of producing a curable liquid developer containing a pigment, a binder resin, a toner particle dispersing agent, and a curable insulating liquid, this method including: a pigment dispersion step of preparing a pigment dispersion containing a pigment, a binder resin, a toner particle dispersing agent, and a solvent; a mixing step of mixing the pigment dispersion with a curable insulating liquid; and a distillative removal step of distillatively removing the solvent from a mixture obtained in the mixing step.

Method of producing curable liquid developer and curable liquid developer

The ultraviolet-curable liquid developer contains a hydrophobic cationically polymerizable liquid monomer, a photopolymerization initiator, a toner particle insoluble in the liquid monomer, and a toner particle dispersing agent, wherein the toner particle contains a binder resin that has an acid value of at least 5 mg KOH/g; the toner particle dispersing agent is a polymer that contains at least both a monomer unit represented by general formula (1) and a monomer unit represented by general formula (2); and the toner particle dispersing agent has a monomer unit represented by general formula (1) at a position other than the terminal position.

Ultraviolet-curable liquid developer and method of producing same

A curable liquid developer containing a curable insulating liquid and a toner particle that contains a pigment and a resin, wherein the viscosity of the curable insulating liquid at 25&#xb0; C. is at least 1 mPa&#xb7;s and not more than 100 mPa&#xb7;s, and when A (mPa&#xb7;s) is the viscosity of the curable liquid developer at 25&#xb0; C. in a case where the toner particle concentration in the curable liquid developer is 50 mass %, and B (mPa&#xb7;s) is the viscosity of the curable liquid developer at 25&#xb0; C. in a case where the toner particle concentration in the curable liquid developer is 1 mass %, the value of A&#x2212;B is not more than 1,000 mPa&#xb7;s.

Curable liquid developer and image-forming method using curable liquid developer

Provided is a method of producing a liquid developer containing a dispersing agent, an insulating liquid (a), and a toner particle that contains a colorant and a binder resin, the method including a step (1) of preparing a mixture containing the colorant, the binder resin, the insulating liquid (a), a solvent (b), and the dispersing agent, and a step (2) of distillatively removing the solvent (b) from the mixture, wherein the binder resin dissolves in the solvent (b) and does not dissolve in the insulating liquid (a), the dispersing agent dissolves in both the insulating liquid (a) and the solvent (b), and the binder resin contains a polymer A that has an alkali metal sulfonate group or an alkaline-earth metal sulfonate group.

Method of producing liquid developer

An object of the present invention is to provide a toner that produces an excellent bending resistance in the output image and that also exhibits an excellent low-temperature fixability and an excellent storage stability. This toner includes a binder resin and a thermoplastic elastomer having a crystalline part, wherein the binder resin and the thermoplastic elastomer in the toner are compatible with each other and the toner has a crystalline part originating from the thermoplastic elastomer.

Toner and method of producing toner

Provided is a method for producing core-shell structured resin particles, comprising the steps of: providing a dispersion liquid of hydrophobic resin particles in which the hydrophobic resin particles are dispersed into an aqueous medium containing an anionic surfactant A and an anionic surfactant B; providing a dispersion liquid of resin microparticles in which resin microparticles are dispersed into an aqueous medium; mixing the dispersion liquid of hydrophobic resin particles and the dispersion liquid of resin microparticles; adhering the resin microparticles to surfaces of the hydrophobic resin particles by adding a water soluble metal salt to a mixture resulting from above step, wherein the surfactant A and the surfactant B satisfy the specific conditions.

Method for producing core-shell structured resin microparticles and core-shell structured toner containing core-shell structured resin microparticles

A process for producing a core-shell toner is provided in which the toner has core particles containing at least a binder resin (), a colorant and a release agent and shell layers which contain at least a resin () and with which the core particles are covered; and the process including the steps of (A) mixing a binder resin-() dispersion, a colorant dispersion and a release agent dispersion, (B) adding to a mixed dispersion thus obtained an agglomerating agent to effect agglomeration, (C) adding to core agglomerated particles thus formed a mixture prepared by mixing the resin-() dispersion and a metal salt to make the resin () adhere to the surfaces of the core agglomerated particles, and (D) heating core-shell agglomerated particles thus formed to a temperature not lower than the glass transition temperatures of the binder resin () and resin () to effect fusion thereof.

Toner production process and toner

The invention provides an ink composition, which is improved in dispersibility and fastness properties and is excellent in dispersion stability and re-solubility owing to dispersed particles in which a coloring material is included by a crosslinked hydrophobic block segment in a dispersing polymer. The ink composition contains an amphiphilic block polymer compound, in which a coloring material is included, and a medium, wherein the amphiphilic block polymer compound, in which the coloring material is included, forms a dispersed particle having the hydrophobic block segment as an internal core part, and the hydrophobic block segment is crosslinked.

Polymeric compound containing composition, and image forming process and apparatus

The present invention provides an aqueous dispersion of nonspherical fine resin particles having excellent storage stability and processability such as aggregation and adherence to other substances, a method for producing the aqueous dispersion of fine resin particles, and a method for producing toner particles using the aqueous dispersion of fine resin particles. The present invention relates to an aqueous dispersion of fine resin particles characterized in that the fine resin particles are nonspherical particles with an average minor axis being 0.02 &#x3bc;m or more and 1.00 &#x3bc;m or less and an average ratio of a major axis to a minor axis being 2.0 or more and 5.0 or less, a method for producing the aqueous dispersion of fine resin particles, and a method for producing toner particles using the aqueous dispersion of fine resin particles.

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Tokyo, Japan

Ryo Natori