Dainichiseika Color & Chemicals Mfg. Co., Ltd.

Ukima Chemicals & Color Mfg. Co., Ltd.

Kabushiki Kaisha Toshiba

Zeon Corporation

Sanyo Denki Co., Ltd.

Osamu Kawakami

Kenichi Takahashi

Kazuyuki Hanada

Kazuya Kimura

Manabu Uruno

Katsuharu Iwamoto

Makoto Takemura

Hidehiko Kuroda

Hideo Miyagawa

Naruhiko Kudou

Hisashi Takizawa

Naruhiko Mukai

Ikuo Tashiro

Kesatsugu Watanabe

Fujio Shiraishi

Yuka Takada

Nobuyuki Aoki

Takiji Ishimura

Provided is a fibrous carbon nanostructure that has excellent dispersibility after surface modification treatment. The fibrous carbon nanostructure has an amount of localized electrons of 1.0×10/g or more as determined by electron spin resonance measurement at a temperature of 10 K.

Fibrous carbon nanostructure and method of producing surface-modified fibrous carbon nanostructure

Provided is a fibrous carbon nanostructure that is easy to surface modify. A peak of a temperature derivative curve that is a first derivative curve of a thermogravimetric curve obtained by thermogravimetric analysis of the fibrous carbon nanostructure in a dry air atmosphere has a full width at half maximum of not less than 38&#xb0; C. and less than 90&#xb0; C., and a high-temperature-side temperature at a height equivalent to 1/10 of the peak top height of the peak is 658&#xb0; C. or higher.

Fibrous carbon nanostructure, method of producing fibrous carbon nanostructure, and method of producing surface-modified fibrous carbon nanostructure

Disclosed is a method of producing surface-treated carbon nanostructures which comprises: a depressurization step wherein a carbon nanostructure-containing liquid which comprises carbon nanostructures and a dispersion medium is depressurized; and a surface treatment step wherein an oxidizing agent is added in the carbon nanostructure-containing liquid after or during the depressurization step so that the carbon nanostructures have a surface oxygen atom concentration of 7.0 at % or more. The carbon nanostructures preferably comprise carbon nanotubes.

Method of producing surface-treated carbon nanostructures

Provided is a fibrous carbon nanostructure that is easy to surface modify. A symmetry factor of a peak of a first derivative curve of a thermogravimetric curve obtained through thermogravimetric analysis of the fibrous carbon nanostructure in a dry air atmosphere is 3.70 or less. The first derivative curve of the thermogravimetric curve can be a temperature derivative curve of the thermogravimetric curve or a time derivative curve of the thermogravimetric curve.

Fibrous carbon nanostructure, method of evaluating fibrous carbon nanostructure, and method of producing surface-modified fibrous carbon nanostructure

Provided is a fibrous carbon nanostructure with which a dispersion liquid having high dispersibility can be obtained without using a dispersant and thus with which a homogeneous film that is free of clumps can be obtained. In temperature programmed desorption of the fibrous carbon nanostructure, carboxyl group-derived carbon dioxide desorption among carbon dioxide desorption at from 25&#xb0; C. to 1,000&#xb0; C. is more than 1,200 &#x3bc;mol/g.

Fibrous carbon nanostructure

Provided are a self-crosslinking polyhydroxy polyurethane resin derived from a reaction of a 5-membered cyclic carbonate compound and an amine compound and having masked isocyanate groups in its structure; a process for producing the resin; an imitation leather composed of a base fabric and a resin composition composed of the resin as its principal component and impregnated in or laminated on the base fabric; as kin material made of a thermoplastic polyolefin resin, said skin material including a thermoplastic polyolefin resin sheet and a top coat layer formed directly or via a primer layer on the sheet, wherein the top coat layer has been formed with a resin composition composed of the resin as its principal component; and a weather strip material composed, as its principal components, of the resin and a specific diorganopolysiloxane and/or a silicone oil.

Self-crosslinkable polyhydroxy polyurethane resin, resinaceous material that contains the resin, process for production of the resin, and imitation leather, surfacing material and weatherstrip material, using the resin

Provided are a self-crosslinking polysiloxane-modified polyhydroxy polyurethane resin derived from a reaction of a 5-membered cyclic carbonate polysiloxane compound represented by the following formula (1) and an amine compound and having polysiloxane segments and masked isocyanate groups in its structure: wherein A means and its production process. The present invention can provide a polyhydroxy polyurethane resin, the development of applications of which has not moved ahead in the prior art, as a novel self-crosslinking polyhydroxy polyurethane resin that enables to provide products excellent in lubricity, abrasion resistance, chemical resistance, non-tackiness, heat resistance and the like, is useful from the viewpoint of the reduction of warming gas, and is responsive to the environment.

Self-crosslinking polysiloxane-modified polyhydroxy polyurethane resin, resin material containing same, method for producing same, artificial leather comprising same, and thermoplastic polyolefin skin material comprising same

Provided is a liquid level measuring technique capable of measuring a liquid level with high accuracy even if a liquid stored in a container is boiling. The liquid level measuring apparatus includes: ultrasonic sensors each configured to transmit and receive an ultrasonic wave, the ultrasonic sensors being respectively set at a plurality of positions on an outer surface of a container that stores a liquid; a transmission/reception controlling unit configured to set, as a target, any one of the ultrasonic sensors at the plurality of positions and control the transmission and reception of the ultrasonic wave of the target; an intensity detecting unit configured to detect an intensity of the ultrasonic wave that satisfies at least 2&#x2266;N (N: natural number), of the ultrasonic waves that are reflected N times on an inner surface of the container; a gas/liquid determining unit configured to determine which of the liquid and a gas a reflection point on the inner surface is in contact with, on a basis of the detected intensity of the ultrasonic wave; and a level determining unit configured to determine a liquid level of the liquid on a basis of gas/liquid determination results respectively derived by the ultrasonic sensors at the plurality of positions.

Liquid level measuring apparatus, method, and program

Disclosed are a polysiloxane-modified polyhydroxy polyurethane resin characterized by being derived from a reaction between a 5-membered cyclic carbonate polysiloxane compound represented by the below-described formula (1) and an amine compound, and its production process; and a resin composition, thermal recording medium, imitation leather, thermoplastic polyolefin resin skin material, weather strip material, and weather strip, all of which make use of the resin. wherein A means 

Polysiloxane-modified polyhydroxy polyurethane resin, method for producing same, heat-sensitive recording material using the resin, imitation leather, thermoplastic polyolefin resin skin material, material for weather strip, and weather strip

A 5-membered cyclic carbonate polysiloxane compound is represented by the below-described formula (1), and is produced by a process that reacts an epoxy-modified polysiloxane compound with carbon dioxide. wherein A means in which Rmeans an alkylene group which has from 1 to 12 carbon atoms and may be linked via an element of O, S or N and/or &#x2014;(CHO)&#x2014;, Rmeans a direct bond or an alkylene group having from 2 to 20 carbon atoms, Rmay be linked to an alicyclic group or aromatic group, b stands for a number of from 1 to 300, and a stands for a number of from 1 to 300.

Five-membered cyclocarbonate polysiloxane compound and process for preparation of same

Disclosed are a polysiloxane-modified polyhydroxy polyurethane resin derived from a reaction between a 5-membered cyclic carbonate compound and an amine-modified polysiloxane compound, and its production process; and a resin composition, thermal recording medium, imitation leather, thermoplastic polyolefin resin skin material, weather strip material, and weather strip, all of which make use of the resin.

A method of manufacturing a watertight brushless fan motor includes first, combining a stator assembly with a stator and a circuit substrate, a case, a die, and an annular member. The stator assembly is mounted on the bearing supporting cylindrical section of the case. The bearing supporting cylindrical section is engaged and the die and annular member are fixed to the case. An insulating resin is poured into the die to mold spaces between the plate-like section and the bearing supporting cylindrical section so that the stator and the circuit substrate are included inside. The resin may be poured under low vacuum. With this arrangement, the watertight brushless fan motor is provided that can prevent occurrence of a crack in the outer surface of the molded part due to molding shrinkage of the insulating resin or expansion and shrinkage of the insulating resin caused by a change in ambient temperature.

Method of manufacturing a watertight brushless fan motor

In a watertight brushless fan motor of the present invention, a first pad is disposed in a first space between a stator and a circuit substrate , A second pad is disposed in a second space between the circuit substrate and a plate-like section of a case . Spaces between the plate-like section of the case and a bearing supporting cylindrical section are formed with an insulating resin in such a manner that the stator and the circuit substrate are included inside, thereby forming a molded part , With this arrangement, the watertight brushless fan motor is provided that can prevent occurrence of a crack in the outer surface of the molded part due to the so-called molding shrinkage of the insulating resin or expansion and shrinkage of the insulating resin caused by a change in ambient temperature.

Watertight brushless fan motor

It is the object of the present invention to provide a long-life brushless fan motor which can be used for a long time in the environmental conditions in which water containing oil mist is splashed on the fan motor. A stator a circuit substrate including an electronic parts and a plurality of lead wires are received in a stator side case These parts in the case are molded with an epoxy resin having a Shore hardness of D30 to D90 after curing, thereby forming a molded part The pole faces of the stator magnetic poles of the stator are covered with the molded part

Growing community of inventors

Tokyo, Japan

Osamu Kawakami