Toda Kogyo Corporation

Sumitomo Electric Industries, Limited

Todyo Kogyo Corporation

Toda Kogyo Cororation

Kazuyuki Hayashi

Hiroko Morii

Keisuke Iwasaki

Yasuyuki Tanaka

Seiji Ishitani

Mineko Ohsugi

Mamoru Kamigaki

Minoru Ohsugi

Yusuke Shimohata

Norio Sugita

Nanao Horiishi

Koso Aoki

Toru Maeda

Haruhisa Toyoda

Naoto Igarashi

Hiroshi Sumita

Mineko Sakoda

Masaaki Maekawa

Hiroko Itamochi

Hirokazu Kugai

Tomoyuki Imai

Naruo Yokoyama

Suminori Tanaka

Masaaki Fukugauchi

Toshiharu Harada

Masaharu Nishihara

Satoru Saito

Masayuki Watanabe

Masaaki Nishikawa

Akihiro Nishimura

Kunihiro Ichimura

Tosiharu Harada

Masaru Isoai

Yoshiro Okuda

Kazushi Takama

Kazuhiro Hirose

Hirofumi Nishikawa

Toru Iwaki

Shinji Horie

Seiji c/o Toda Kogyo Corp Ishitani

Toru Sumitomo Electric Imdustries Ltd Maeda

Haruhisa Sumitomo Electric Industries Ltd Toyoda

Composite particles of the present invention comprise white inorganic particles, a surface modifier coating layer formed on surface of the respective white inorganic particles, and a dye or lake coat adhered onto the surface of the respective surface-modifier-coated white inorganic particles. The composite particles of the present invention not only exhibit excellent color-developing property and tinting strength but also suppress bleeding.

Composite particles, and coloring composition and resin composition using the same

A manufacturing method of a soft magnetic material has a step of preparing a metal magnetic particle containing iron as the main component, and a step of forming an insulating film surrounding the surface of the metal magnetic particle. The step of forming the insulating film includes a step of mixing and stirring the metal magnetic particle, aluminum alkoxide, silicon alkoxide, and phosphoric acid.

Manufacturing method of soft magnetic material and manufacturing method of dust core

A soft magnetic material is a soft magnetic material including a composite magnetic particle () having a metal magnetic particle () mainly composed of Fe and an insulating coating () covering metal magnetic particle (), and insulating coating () contains an iron phosphate compound and an aluminum phosphate compound. The atomic ratio of Fe contained in a contact surface of insulating coating () in contact with metal magnetic particle () is larger than the atomic ratio of Fe contained in the surface of insulating coating (). The atomic ratio of Al contained in the contact surface of insulating coating () in contact with metal magnetic particle () is smaller than the atomic ratio of Al contained in the surface of insulating coating (). Thus, iron loss can be reduced.

Soft magnetic material, powder magnetic core and method of manufacturing soft magnetic material

Colored composite microparticles comprising silica and an organic pigment in which the silica is enclosed in the organic pigment and contained in an amount of 0.001 to 9% by weight (calculated as Si) based on the weight of the composite particles. These microparticles have a high tinting strength and are excellent in dispersibility and light fastness.

Colored composite microparticles, process for producing the colored composite microparticles, colorant, color filter and ink for ink-jet printing

The soft magnetic material includes a plurality of composite magnetic particles having a metal magnetic particle and an insulating film surrounding the surface of the metal magnetic particle. The metal magnetic particle contains iron as the main component. The insulating film contains aluminum, silicon, phosphorus, and oxygen. The insulating film satisfies the relationship 0.4&#x2266;M/(M+M)&#x2266;0.9 and the relationship of 0.25&#x2266;(M+M)/M&#x2266;1.0 in the case that molar amount of aluminum contained in the insulating film is represented by M, the sum of the molar amount of aluminum contained in the insulating film and the molar amount of silicon contained in the insulating film is represented by (M+M), and the molar amount of phosphorus contained in the insulating film is represented by M.

Soft magnetic material comprising an insulating layer containing aluminum, silicon, phosphorous and oxygen; dust magnetic core; process for producing soft magnetic material; and process for producing dust magnetic core

A color agent for a road marking material comprising composite particles having an average particle diameter of 0.01 to 10.0 &#x3bc;m, said composite particles comprising: inorganic particles; a gluing agent coating layer formed on surface of said inorganic particle; and an organic pigment coat formed onto said gluing agent coating layer in an amount of from 1 to 500 parts by weight based on 100 parts by weight of said inorganic particles. The color agent for a road marking material, contains no harmful elements and exhibits excellent tinting strength, hiding power, light resistance and heat resistance, and is suppressed in surface activity thereof. The road marking material using the color agent, shows a less change in hue with the passage of time and an excellent retroreflective property.

Color agent for road marking material and road marking material using the same

A functional material comprising fine coloring particles having an average primary particle diameter of 1 to 50 nm in a dried state, and having a BET specific surface area value of 30 to 500 m/g and a light transmittance of not less than 80%. The functional material composed of fine coloring particles, exhibits not only an excellent transparency but also a high tinting strength and a clear hue.

Functional material, dispersion containing the functional material, and process for producing the functional material

The transparent coloring composition comprises a solvent and an organic-inorganic composite pigment comprising (i) fine white inorganic particles and an organic pigment adhered to the surface of the respective fine white inorganic particles, or (ii) fine white inorganic particles, a surface modifier coated on the surface of the respective fine white inorganic particles and an organic pigment adhered onto the surface modifier coating layer, primary particles of the composite pigment having an average particle diameter of 1 to 100 nm. The transparent coloring composition for color filter comprises the above transparent coloring composition and a transparent resin containing at least one acid group and/or latent acid group. The color filter is produced by applying a film-forming material made of the above transparent coloring composition for color filter on a substrate. The transparent coloring composition is suitable as a coloring composition for color filter because of excellent dispersibility and spectral properties. Further, the color filter produced from the transparent coloring composition can be suitably used as color filters for color liquid crystal displays (LCD) or the like owing to the excellent spectral properties.

Transparent coloring composition and color filter

A coloring composition for a color filter composed of composite particles having an average particle diameter of 0.00 1 to 1.0 &#x3bc;m, and containing white inorganic particles, a glue coating layer formed on the surface of the white inorganic particle and an organic pigment coat formed on the glue. A dispersant, binder resin, monomer as a reactive diluent, a polymerization initiator and a solvent are also present. The colorant provides not only a sharp particle size distribution but also excellent light resistance.

Coloring composition for color filter containing colorant and color filter using the same

Black composite particles for a semiconductor sealing material of the present invention, comprises:

Black composite particles for semiconductor sealing material, and semiconductor sealing material using the same

Composite particles having an average particle diameter of 0.001 to 10.0 &#x3bc;m, comprise:

Composite particles, process for producing the same, and pigment, paint and resin composition using the same

A magnetic recording medium comprises: Such a magnetic recording medium exhibits not only a smooth surface, a smaller light transmittance and a lower surface electrical resistivity value, but also a small friction coefficient and an excellent running durability.

Black magnetic acicular composite particles for magnetic recording medium and magnetic recording medium using the same

A black toner comprises a binder resin and black composite particles having an average particle diameter of 0.005 to 0.30 &#x3bc;m, and comprising: extender pigments as core particles; a gluing agent-coating layer formed on surface of the respective core particles; and a black pigment coat uniformly formed on the gluing agent-coating layer in an amount of 1 to 500 parts by weight based on 100 parts by weight of the extender pigments. Such a black toner using black composite particles having not only excellent blackness, fluidity and light resistance, but also an excellent dispersibility in binder resins, which toner also exhibits excellent blackness, fluidity and light resistance.

Black toner

Growing community of inventors

Hiroshima, Japan

Kazuyuki Hayashi