Dic Corporation

Dainippon Ink and Chemicals, Incorporated

Activus Pharma Co., Ltd.

Yoshiyuki Sano

Hidetsugu Takagaki

Jian-Jun Yuan

Kazuo Itoya

Shingo Takada

Ren-Hua Jin

Masayoshi Abe

Masamichi Hayashi

Takayuki Kanematsu

Fumihiko Maekawa

Kaori Kawamura

Masafumi Uota

Masanori Miyamoto

Hironobu Oki

Nobuyuki Kimura

Yasuo Aoki

Mitsuru Sakai

Shigenori Nakanishi

Hitoshi Kondou

Masayuki Moriwaki

Nobuhiro Sekine

Hiroshi Yonehara

Yasuyuki Katakami

Hiromi Ohki

Yutaka Tachikawa

Hirohito Nagata

Flaky alumina particles including mullite in a surface layer of the flaky alumina particles. A method for producing flaky alumina particles including forming a mixture by mixing together an aluminum compound that contains elemental aluminum, a molybdenum compound that contains elemental molybdenum, and silicon or a silicon compound that contains elemental silicon, the aluminum compound being in an amount greater than or equal to 50 mass %, calculated as AlO, the molybdenum compound being in an amount less than or equal to 40 mass %, calculated as MoO, the silicon or the silicon compound being in an amount of 0.5 mass % or greater and less than 10 mass %, calculated as SiO, relative to a total mass of the flaky alumina particles taken as 100 mass %; and firing the mixture.

Flaky alumina particles and method for producing flaky alumina particles

To provide plate-like alumina particles that are less likely to wear apparatuses. Plate-like alumina particles containing germanium or a germanium compound. The plate-like alumina particles preferably have a molar ratio of Ge to Al, [Ge]/[Al], of 0.08 or more as determined in an XPS analysis. The plate-like alumina particles preferably contain the germanium or germanium compound in a surface layer. The plate-like alumina particles preferably have a density of 3.7 g/cmor more and 4.1 g/cmor less. The plate-like alumina particles preferably have a molar ratio of Ge to Al, [Ge]/[Al], of 0.08 or less as determined in an XRF analysis.

Tabular alumina particles and method of producing tabular alumina particles

The present invention provides alumina particles having a fixed card-house structure formed of three or more flat plate-like alumina particles and having an average particle diameter of 3 to 1000 &#x3bc;m. Also, there is provided alumina particles having an average particle diameter of 3 to 1000 &#x3bc;m and having a fixed card-house structure in which the three or more flat plate-like alumina are aggregated to be crossed each other at two or more plurality of positions, and the plane directions of the flat plates crossed each other are in a state of disordered arrangement.

Alumina particle

A problem is to provide a silver paste which can produce, without variation in resistivity value, a conductive silver coating film exhibiting resistivity substantially equivalent to the resistance value of bulk silver in low-temperature sintering. The problem is solved by providing a silver paste including a silver nanoparticle aqueous dispersion prepared by using a compound having a polyethyleneimine skeleton as a protective agent, a compound having a functional group reactable with nitrogen atoms in the polyethyleneimine, and at least one compound selected from the group consisting of a compound having an amine functional group and a compound having an amide functional group.

Silver paste, and conductive molded article obtained using same

Provided is a phthalocyanine compound which is halogen-free and which has a green hue, excellent resistance to organic solvents and acids, and high chroma. Also provided are a metal-free phthalocyanine compound or a metal phthalocyanine compound represented by specified general formula (1-1) or (1-2) and having a N,N'-disubstituted imidazolone structure or piperazinedione structure introduced therein, and a coloring composition including the compound and a synthetic resin. The phthalocyanine compound of the present invention exhibits a clear green color and is halogen-free, and is thus useful as a clear green pigment for coloring materials such as a coating material, plastic, a printing ink, rubber, leather, textile printing, a color filter, a jet ink, a heat transfer ink, etc. 

Phthalocyanine compound and production method therefor, and coloring composition containing the phthalocyanine compound

Provided is a composite including copper nanoparticles or copper(I) oxide nanoparticles and a thioether-containing organic compound represented by X(OCHCHR)OCHCH(OH)CHSZ [X represents an alkyl group; Rrepresents a hydrogen atom or a methyl group; n represents an integer of 2 to 100; Ris independent between repeating units and may be the same or different; and Z represents an alkyl group, an allyl group, an aryl group, an arylalkyl group, &#x2014;R&#x2014;OH, &#x2014;R&#x2014;NHR, or &#x2014;R&#x2014;(COR)(where Rrepresents a saturated hydrocarbon group; Rrepresents a hydrogen atom, an acyl group, an alkoxycarbonyl group, or a benzyloxycarbonyl group; Rrepresents a hydroxy group, an alkyl group, or an alkoxy group; and m represents 1 to 3)]. Provided is a method for producing a composite of an organic compound and copper nanoparticles or a composite of an organic compound and copper(I) oxide nanoparticles, the method including reducing a copper compound in the presence of a thioether-containing organic compound represented by the general formula (1) above.

Composite of organic compound and copper nanoparticles, composite of organic compound and copper(I) oxide nanoparticles, and methods for producing the composites

Provided are a composite of nanoparticles of a metal such as gold, silver, a platinum metal, or copper, and a polymer, the composite allowing formation of a metal film having a sufficiently low resistivity in terms of practicality simply by drying at room temperature without requiring any special heating-baking step or any step of removing a protective agent with a solvent; a dispersion liquid of the composite; methods for producing the foregoing; and a plastic substrate formed from the dispersion liquid. The composite comprises a (meth)acrylic-based copolymer having, as side chains, a polyethylene glycol chain and a phosphate residue represented by &#x2014;OP(O)(OH)2 and having, at at least one end of the molecular chain, &#x2014;SR (where R represents an alkyl group or the like).

Metal-nanoparticle-containing composite, dispersion liquid thereof, and methods for producing the metal-nanoparticle-containing composite and the dispersion liquid

A quaternary ammonium compound of the present invention is a quaternary ammonium compound represented by general formula (I) or (I') (wherein, A represents a linear alkyl group having 1 to 4 carbon atoms, a branched alkyl group having 2 to 4 carbon atoms, a linear alkyl group having 1 to 4 carbon atoms and a hydroxyl group, or a branched alkyl group having 2 to 4 carbon atoms and a hydroxyl group, Rto Rmay be the same or different and represent a linear or branched alkyl group having 1 to 12 carbon atoms, one of Rto Rrepresents COor SO, while no more than three of the remaining Rto Rrepresent a group selected from the group consisting of a hydroxyl group and an alkoxy group having 1 to 4 carbon atoms, and other Rto Rrepresent a hydrogen atom, one of R&#x2032;to R&#x2032;represents COH or SOH, no more than three of the remaining R&#x2032;to R&#x2032;represent a group selected from a protected hydroxyl group and an alkoxy group having 1 to 4 carbon atoms, while other R&#x2032;to R&#x2032;represent a hydrogen atom, and Xrepresents an anion capable of forming a salt with a quaternary ammonium group).

Quaternary ammonium compound, process for producing the same, therapeutic agent for cerebrovascular disorder, and therapeutic agent for heart disease

There are provided novel compounds of the formulae I and II: ##STR1## and their physiologically acceptable salts. The compounds according to the present invention and their physiologically acceptable salts exhibit an antiallergic activity and are useful for treating allergic diseases.

3- or 4-glycosyloxybenzopyran derivative and antiallergic agent

Chalcone derivatives having at least one tetrahydropyranyloxy group is disclosed. Typically, the compounds are represented by general formula (I) ##STR1## wherein X and X' each represent a tetrahydropyranyl group, R and R', which are then same or different, each represent an alkyl group or a hydrogen atom, n and n' each are an integer of from 0 to 5, m and m' each are integers of from 0 to 5, provided that n+n' is 1 or more, and that n+m is an integer of from 0 to 5 and n'+m' is an integer of from 0 to 5. Also, disclosed are processes for producing the chalcone derivatives starting from acetophenone or its derivative and benzaldehyde or its derivative at least one of which has at least one tetrahydropyranyloxy group. Further, disclosed is 2,3,4,2',4'-pentahydroxychalcone.

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Chiba, Japan

Yoshiyuki Sano