Kawamura Institute of Chemical Research

Dic Corporation

Dainippon Ink and Chemicals, Incorporated

Kyushu University

Ren-Hua Jin

Jian-Jun Yuan

Seungtaeg Lee

Yoshiyuki Sano

Norimasa Fukazawa

Pei-Xin Zhu

Masafumi Uota

Hideo Nagashima

Tsuyoshi Morita

Hitoshi Hayakawa

Koichiro Matsuki

Yuji Ohashi

Hirohide Nakaguma

Kaori Kawamura

Hiroyuki Yamazaki

Hiroshi Yonehara

Shota Niibayashi

Haifeng Zhao

Zhiqiang Shi

Rika Kimura

Nobuhiro Sekine

There are provided an infrared absorbing thin film that efficiently absorbs infrared rays and has good versatility by controlling the absorption intensity of titanium oxide in an infrared region and a method for producing the infrared absorbing thin film. The infrared absorbing thin film containing a rutile-type titanium oxide crystal.

Infrared absorbing thin film containing rutile-type titanium oxide crystal and method for producing the same

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

An organic/inorganic composite coating film comprising an inorganic material as a matrix and an organic material combined therewith. The coating film has a regular hollow structure therein, and the coating film surface has a rugged pattern with semispherical protrusions. Also provided is a large-area structural color film obtained by burning the composite coating film. The organic/inorganic composite coating film is obtained by applying an aqueous coating composition comprising a metal alkoxide, an aqueous dispersion of monodisperse polymer particles, and an acid catalyst to a substrate and curing the coating composition. Burning the organic/inorganic composite coating film gives the structural color film.

Organic/inorganic composite coating film, structural color film using the same, and preparation methods thereof

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

The present invention provides a structure in which the surface of a solid substrate of any shape is covered with metal oxide, in particular, a nanostructure composite in which polyethyleneimine, which is an organic substance, and metal oxide, which is an inorganic substance, are combined in nano-meter scale, spreads at the entire surface of a substrate, and the nanostructure composite forms a nano-boundary of complex shapes so as to thoroughly cover the entire surface of the substrate; a structure in which metal ions, metal nano-particles, organic pigment molecules are contained in the nanostructure composite; a process for producing these structures which can produce these structures with ease and efficiently; and an application method for the structures as an immobilized catalyst type reactor.

Process for producing nanostructure composite-covered structure, nanostructure composite-covered structure, and reactor using nanostructure composite-covered structure

Disclosed is a method for producing a silver-containing nanostructure which can reduce the time required for a post treatment step and the amount of a waste material and which is achieved by the application of the reduction reaction of silver oxide; and a silver-containing nanostructure having a specific structure, which can be produced by the method. Specifically disclosed is a method for producing a silver-containing nanostructure, including dispersing a polymeric compound in which a hydrophilic segment is bonded to a polyalkyleneimine chain in a medium, adding silver oxide thereto, and carrying out a reduction reaction of the silver oxide, thereby obtaining a silver-containing nanostructure. In the method, a structure having a branched structure can be produced when a specific compound is used as a complexing agent. The silver-containing nanostructure thus produced can be used as a conductive paste or the like.

Method for production of silver-containing nano-structure, and silver-containing nano-structure

The present invention provides a doped titanium oxide having visible light-responsiveness whose structure is specified, and a simple production method thereof. By burning with heat a layered structure composite laminated alternately with polymer and the titania, which is obtained using basic polymer having amino group(s) and water-soluble titanium compound, carbon atoms and nitrogen atoms in the polymer are, doped to the crystalline surface of titanium oxide. As making the polymer complex with metal ions beforehand, the metal ions can be also doped to the titanium oxide.

Method for production of doped titanium oxide, doped titanium oxide, and visible light-responsive photocatalyst comprising the doped titanium oxide

The present invention relates to a structural object coated with a superhydrophobic nanostructure composite, the structural object being obtained by densely coating a surface of a solid substrate having a desired shape with a nanostructure obtained by combining a polymer having a polyethyleneimine skeleton with silica on the nanometer order, and bonding a hydrophobic group to the surface of the nanostructure, and a process for producing the structural object. The present invention also relates to a structural object coated with a superhydrophobic nanostructure composite, the structural object being obtained by removing the polymer having the polyethyleneimine skeleton from the nanostructure and bonding a hydrophobic group to the surface of the residual nanostructure containing silica as a main constituent component, and a process for producing the structural object. Furthermore, the present invention provides a method of using the structural object as a container for transferring an aqueous solution.

Structural object coated with superhydrophobic nanostructure composite and process for producing the same

The object of the present invention is to provide a method of producing a polymer wherein radical-polymerizable monomers can be polymerized in a quantitative manner in a relatively short time, and a polymer or a block copolymer having at its termini a functional group that can be chemically converted while the polymer or the block copolymer has a high molecular weight can be produced. Furthermore, the object of the present invention is to provide a method of producing a polymer wherein the polymer is re-precipitated in a general solvent by an easy method, and the used iron complexes are recovered in the solvent, thereby recycling the iron complexes.

Method of producing polymer using iron complex as catalyst

A silica nanofiber is derived from a crystalline polymer filament of a polymer including straight chain polyethyleneimine backbones, which is capable of forming a water-insoluble crystal in the presence of water molecules at room temperature, and the crystalline polymer filament in the silica concentrates metal ions, thereby realizing a composite nanofiber including metals or metal ions in the silica. Furthermore, the composite nanofiber of the present invention can be easily produced by fixing a polymer structure in the silica as the scaffold for metal ions and concentrating metal ions at the scaffold or reducing the metal ions. Furthermore, a metal-containing silica nanofiber can be easily obtained by removing a polymer component from the composite nanofiber, the composite nanofiber association, and the complex nanofiber structure. These nanofibers can be assembled and integrated, and the assembled or integrated association or structure can realize various shapes.

Composite nanofiber, composite nanofiber association, complex structure, and production method thereof

An aqueous coating composition comprising a hydrophilic cationic polymer having an amino group (A), nonionic polyalcohol (B), a tri- or more valent silane compound (C), and water (D). According to the aqueous coating composition of the present invention, it is possible to produce an organic and inorganic hybrid coating film having a high degree of hardness and excellent abrasion resistance in relative mild production conditions by a simple method.

Aqueous coating composition

Monodisperse silica spheres containing polyamine, which comprise a polymer (A) having a linear polyethyleneimine chain, a compound (B) having an acidic group, and silica (C).

Monodisperse silica spheres containing polyamine and process for producing the same

The present invention provides a comb-shaped epoxy resin represented by the following formula (1): in the formula (1), Xand Xrepresent a divalent group having a residue selected from xanthene residue, biphenylene residue, hydrogenated bisphenol residue, alkylene residue and polyoxyalkylene residue, each may having a methyl group or a ethyl group as a substituent, and at least one of them is an aromatic residue, Y represents a polymer chain such as linear polymer chain, a number average polymerization degree being 5 to 2000, and n (number average polymerization degree) represents an integer within a range of 3 to 200, and to a method for preparing the comb-shaped epoxy resin.

Comb-shaped epoxy resin and method for preparing comb-shaped epoxy resin

A styrene resin composition is provided which has a high molecular weight enabling a molded product obtained therefrom to have satisfactory strength, has a high melt mass-flow rate, high melt tension, and hence excellent moldability, and is less apt to gel during production, and a process for producing such a styrene resin composition. The styrene resin composition comprises a linear polystyrene having a weight average molecular weight of 200,000 to 350,000 and a multibranched polystyrene having a weight average molecular weight of 1,000,000 to 10,000,000, has an average molecular weight of 250,000 to 700,000, and a melt mass-flow rate (MFR) and melt tension (MT) which satisfy the following formulas (1) and (2) respectively:&#x2267;45&#xd7;exp(&#x2212;0.1&#xd7;&#xd7;10)&#x2003;&#x2003;(1)&#x2267;0.07&#xd7;10+1.8.&#x2003;&#x2003;(2)

Styrene resin composition and process for producing the same

A water-soluble block copolymer having a mass average molecular weight of 2500 to 800000 and comprising, within a molecule, a poly(ethylene imine) block unit and a poly(N-propionylethylene imine) block unit is a novel linear or star-shaped water-soluble block copolymer.

Growing community of inventors

Tokyo, Japan

Ren-Hua Jin