Kyoto University

Dainichiseika Color & Chemicals Mfg. Co., Ltd.

Yokohama National University

National Institute of Technology

Emaus Kyoto, Inc.

Panasonic Corporation

Mitsubishi Chemical Corporation

Nanyang Technological University

Daio Paper Corporation

Godo Shigen Co., Ltd

Kosen National Institute of Technology

National University Corporation Yokohama National University

Keita Sakakibara

Yoshinobu Tsujii

Takaya Sato

Ken Nakano

Hiroyuki Shimanaka

Atsushi Goto

Takahiro Imai

Hitoshi Hattori

Toshikazu Oda

Norio Ishizuka

Taiyo Aoyagi

Kyoko Konishi

Shinya Sasaki

Hiromasa Sato

Hiroshi Watanabe

Ikko Matsusue

Shoya Yoda

Junya Okawa

Yoichi Tagi

Chiharu Tadokoro

Takahito Ikuma

Hidetoshi Hiraoka

Hiroyuki Arafune

Michihiko Miyamoto

Koji Tanaka

Takuya Jitsukawa

Hiroto Komatsu

Yoshihiko Shimizu

Takuo Nagamine

Miho Tanishima

Mayu Miyazaki

Kazue Kurihara

The present invention provides a surface treatment film that is capable of imparting durability such as wear resistance, friction resistance, chemical resistance, heat resistance, and solvent resistance to the surfaces of various substrates, and that exhibits excellent adhesion to the surfaces of the substrates. The surface treatment film is provided on the surface of a substrate. The surface treatment film has a laminated structure that includes a polymer layer (i) disposed on the surface side of the substrate and a polymer layer (ii) disposed on the polymer layer (i). The polymer layer (i) contains a first polymer derived from a polymerization initiation group-containing polymer, such as a polyester having, in a side chain, a functional group represented by formula (1) wherein Rrepresents a hydrogen atom, a methyl group, or the like, Rrepresents a methyl group or the like, X represents a chlorine atom or the like, Y represents O or NH, and * shows a bonding position. The polymer layer (ii) contains a second polymer which contains a constituent unit derived from a monomer such as an aromatic vinyl-based monomer and which extends using the functional group represented by formula (i) as a polymerization initiation point.

Surface treatment film, manufacturing method therefor, and article

Material and sliding system

Provided are: a fine cellulose fiber that is superior in handling properties and that can suitably be used as a reinforcing material or the like for resin; a production method of the fine cellulose fiber; and a slurry and a composite comprising the fine cellulose fibers. The present invention pertains to fine cellulose fibers comprising a carbamate group. The degree of substitution with the carbamate group with respect to hydroxy groups in the fine cellulose fibers is preferably no less than 0.05 and no greater than 0.5. The present invention pertains to a slurry comprising the fine cellulose fibers, to a composite comprising the fine cellulose fibers and a resin, and to a production method of the fine cellulose fibers, comprising performing a heat treatment on a mixture of a plant raw material and urea or the like, and performing a miniaturization treatment of the plant raw material.

Fine cellulose fiber, production method thereof, slurry, and composite

A method for manufacturing a graft polymer, that ensures more stable progress of a living radical polymerization by using a monomer structural unit containing an iodine initiating group as an initiator, includes performing a living radical polymerization of a compound with a vinyl monomer by an organic catalyst to manufacture the graft polymer. The compound has a recurring unit represented by a formula (1) below in a main chain:  where, R: linking group (linear, branched, or cyclic alkylene group having 1 to 30 carbon atoms that may contain an ether bond, an amide bond, or an ester bond, an aromatic group), R, R, R, R, R: an aromatic group, an aliphatic group, a hydrogen atom, an aliphatic group, and n=1 to 5.

Method for manufacturing graft polymer, graft polymer, and initiator of graft polymer

An electroacoustic transducer includes: a diaphragm; a magnetic circuit having a magnetic gap; a frame that holds the diaphragm and the magnetic circuit; a voice coil having one end portion positioned within the magnetic gap and the other end portion coupled to the diaphragm; and a low friction material that is disposed in a sliding portion formed by the voice coil and the magnetic circuit, and includes polymer compounds swollen with liquid.

Electroacoustic transducer

A clearance narrowing material containing a brush-shaped polymer chain aggregate formed of multiple polymer chains immobilized on a substrate. The invention provides a clearance narrowing material which can effectively prevent fluid leakage through a clearance and which does not disturb relative movement of members to form a clearance, and can realize an article in which fluid leakage through a clearance can be effectively prevented and the members to form a clearance can move smoothly.

Clearance narrowing material, clearance narrowing material composite, and article using same

Using an organic compound having a bottle brush structure, a material having softness and resilience and having excellent low-friction performance (SRT material) can be provided. Preferably, the SRT material contains a reinforcing filler, and may contain a lubricating liquid to be gelled.

SRT material, composite and method for producing the same

The present invention provides porous particles made of an organic polymer, uniform in shape, and having through holes that are not closed. The porous particles according to the present invention are porous particles having a substantially spherical shape. The porous particles are made of an organic polymer. Each of the porous particles has an interconnected pore structure in which through holes provided inside the porous particle communicate with each other, and ends of the through holes are open toward an outside of the porous particle.

Porous particle made of organic polymer, method for producing porous particle made of organic polymer, and block copolymer

The present invention provides a separating medium including porous resin particles which has a sufficient pore diameter suitable for liquid chromatography applications and which has high strength, is reduced in pressure loss during liquid passing, has the excellent property of separating a desired substance, and has low nonspecific adsorption properties. The separating medium of the invention is a separating medium obtained by treating porous epoxy resin particles and having an average pore diameter of 10 to 2,000 nm, or a separating medium obtained by treating porous epoxy resin particles and having a water content of 50% or higher.

Separating medium and column for liquid chromatography

An object of the present invention is to provide a high-performance polymer dispersant that can be applied to cellulose being a hydrophilic substance, and another object of the present invention is to provide a technology for practical application of obtaining a cellulose-dispersed resin composition that realizes stable dispersion of cellulose in a simpler manner and in an environmentally conscious manner that never uses a large amount of organic solvents when the polymer dispersant for cellulose is applied to cellulose and disperses the cellulose in a thermoplastic resin. These objects are achieved by providing a polymer dispersant for cellulose, being a polymer compound including a block copolymer structure having a resin-affinitive segment A and a cellulose-adsorptive segment B, the polymer compound synthesized by a reversible chain transfer catalyzed polymerization (RTCP) method not using any of a heavy metal, a nitroxide compound, and a sulfur-based compound, using an organic iodine compound as an initiation compound, and using a phosphorus compound, a nitrogen compound, an oxygen compound, or a carbon compound as a catalyst.

Polymer dispersant for cellulose, aqueous dispersion treatment agent containing same, readily dispersible cellulose composition, cellulose dispersion resin composition, and dispersant-containing resin composition for cellulose dispersion

An object of the present invention is to provide a technology of dispersing cellulose readily in a hydrophobic substance such as a resin by treating cellulose being a hydrophilic substance in a system that contains water as a main medium with a polymer dispersant, which has been developed for dispersing a fine and hydrophobic substance such as a pigment, in a simple and efficient manner without conducting surface modification of nanocellulose or other treatments. The object is solved by a process for producing a readily dispersible cellulose composition, the process including dissolving a polymer dispersant having a block copolymer structure having a resin-affinitive segment A and a cellulose-adsorptive segment B in a hydrophilic organic solvent solution, adding a surface active agent to the resultant solution, thereafter adding water to the resultant mixture to prepare an aqueous dispersion treatment agent containing the polymer dispersant, and adding the obtained aqueous dispersion treatment agent to cellulose in a water-containing state or in a dry state, thereby obtaining a readily dispersible cellulose composition. The object is also solved by a process for producing an aqueous dispersion treatment agent for use in the process for producing a readily dispersible cellulose composition, the readily dispersible cellulose composition, and a cellulose-dispersed resin composition using the readily dispersible cellulose composition.

Production method for readily dispersible cellulose composition, readily dispersible cellulose composition, cellulose dispersion resin composition, and production method for water-based dispersant for cellulose

Growing community of inventors

Kyoto, Japan

Keita Sakakibara