Nippon Shokubai Co., Ltd.

Ckd Corporation

Industrial Science and Technology

Yoshinobu Asako

Satoru Ono

Ryuji Aizawa

Seiichi Teshima

Minoru Kobayashi

Kozo Tajiri

Izuho Okada

Kazushi Omote

Ai Nishichi

Yoshikuni Mori

Hayato Ikeda

Toshiya Iida

Shimpei Sato

Minoru Aoki

Shoji Ito

Sadao Miki

Satoshi Ishida

Kazuhiko Murata

Masayoshi Konishi

Kiyomi Arimatsu

Mitsuo Kushino

Tatsuhito Matsuda

Nobuyuki Ando

Masanori Ando

Kazuhiro Anan

Hironobu Toribuchi

Kazutoshi Ito

Akihiko Fukada

Keiichi Uehara

Shinichi Goto

Hayahide Yamasaki

Eiji Uematu

Tetsuhiko Kobayashi

Toru Sakaguchi

Kumiko Kawada

The present invention has an object to provide a transparent resin material having a low water absorption ratio without deteriorating various properties such as transparency which transparent resin has and also having a controllable refractive index. The present invention provides a transparent resin material containing a polymer capable of forming a formed product having transparency, wherein the transparent resin material comprises a fluorine atom-containing polymer and/or compound and contains 0.3 to 35% by weight of a fluorine atom in 100% by weight of the formed product.

Transparent resin material

It is an object of the present invention to provide a liquid composition for an organic-inorganic composite dielectric excellent in dispersibility of an inorganic dielectric in an organic polymer and exhibiting a high dielectric constant in the case where the composition is used for producing an organic-inorganic composite dielectric. The present invention is directed to a liquid composition for a composite dielectric, which comprises an inorganic dielectric and a fluorinated aromatic polymer.

Resin composition for composite dielectric material, composite dielectric material and electric circuit board using the same

The present invention has an object to provide a fluorine-containing compound which can be used for applications such as additives making a transparent resin material low in a water absorbing ratio and high in water repellency without deteriorating of various properties such as transparency which the transparent resin material has, a fluorine-containing ester compound which is superior in properties such as heat resistance and low moisture(water) absorption property and can be suitably used in various fields such as a material for electronic information, a material for precision instruments and an optical material, a fluorine-containing aryl ester polymer, methods of producing the same. The present invention provides a fluorine-containing compound represented by the following formula (1): 

Fluorine-containing compound

A method for producing a fluorine-containing polyimide film excelling in heat resistance, resistance to chemicals, water repellency, dielectric properties, electrical properties, and optical properties and a spin coater suitable for the method are to be provided. A method for the production of a fluorine-containing polyimide film which comprises forming a coating film of a fluorine-containing polyimide precursor in an atmosphere having a relative humidity thereof adjusted to a level of not more than 50 RH % and then subjecting the fluorine-containing polyimide precursor to heat treatment thereby forming a fluorine-containing polyimide film is provided. By adjusting the relative humidity in accordance with this method, the fluorine-containing polyimide precursor can be prevented from being decomposed by the absorption of moisture and consequently prevent effectively the fluorine-containing polyimide film from forming piriform spots and scratches. Further, by forming the coating film while keeping the coating film sprayed with a gas particularly during the course of spin coating thereby giving rise to a layer of air flow on the coating film, misty substances of the coating solution generated within the spin coater can be prevented from adhering again to the coating film and consequently ensure the production of a coating film of uniform quality. This formation of the layer of air flow can be facilitated by providing the spin coater with a lid and furnishing the lid with a gas feed port.

Method and apparatus for production of fluorine-containing polyimide film

According to the present invention, electrorheological fluid is deaerated after it is sealed in a closed device which is operated by the electrorheological fluid. Thus, it is possible to control the operation of the closed device in accordance with an electric field. Additionally, the control of viscosity is not affected by repetitive operations of the closed device, thereby obtaining a closed device having a smooth operation and good repeatability. The deaeration is achieved under a predetermined reduced pressure, for example, of not more than 100 torr. In addition thereto, a suitable heating process is carried out as required.

Method for deaerating electrorheological fluid in a closed device

Method for production of halogen-containing aromatic compound

Process for production of 1,4-bis(difluoroalkyl)benzene derivative

This invention relates to a method for the production of an aromatic compound (II) having a (CH,),CX,Br group (wherein X represents a fluorine or chlorine atom and the X's may be same or different, and n is an integer in the range of 0 to 4) by the reaction of photo-bromination of an aromatic compound (I) having a (CH,),CX,H group (wherein X and n are as defined above) with a brominating agent, wherein the photo-bromination reaction is carried out while removing hydrogen bromide generated in the reaction system and/or in an atmosphere of a low oxygen content, and a halogen-containing naphthalene compound represented by the following formula (1):

For example, a blended composition is produced first by letting a monomer composition, mainly composed of alkyl (meth)acrylate and including a compound having a plurality of polymeric groups within a molecule, contain microscopic particles, such as carbon black, having an average primary particle size in a range between 1 nm and 200 nm, and then the blended composition is polymerized. Consequently, it has become possible to produce inexpensive crosslinked elastomer having excellent physical properties, such as small creep (low creep) in compression set, tensile elongation set, etc., and excellent mechanical strength, such as tensile break strength and tensile break elongation, in a simple procedure omitting the post-crosslinking step at a high-level productivity while saving energy and time spent in the kneading step.

Crosslinked elastomer and producing process thereof

The sulfonation of a polyaniline or a derivative thereof by the use of a sulfonating agent, characterized by dispersing the polyaniline or the derivative thereof in a reaction solvent thereby inhibiting the formation of lumps of grains due to substantial aggregation. Preferably, the solvent for the reaction is an organic solvent incapable of reacting with the sulfonating agent. The initial stirring power for the reaction of sulfonation is preferred to be not less than 0.03 kW/m,and the polyaniline or the derivative thereof is preferred to have a water content of not more than 8 wt. %. Further, this invention is characterized by subjecting a polyaniline having introduced a sulfonic acid group therein or a derivative thereof to hydrolysis in a mixed solution of water with a hydrophilic organic solvent. The hydrophilic organic solvent is preferred to be an alcohol. The aqueous solution of the water-soluble conducting polyaniline obtained by the method of production mentioned above can be made to form a thin film by a simple technique such as spin coat, dip coat, or bar coat and utilized for various antistatic applications and non-linear optical materials.

Method for production of water-soluble conducting polyaniline

An electrorheological fluid composition comprises dielectric particles as a disperse-phase and an electrically insulating oil as a dispersion medium, wherein the dielectric particle has a polymer portion and an electrically conductive carbon black portion and the polymer portion is grafted on the carbon black portion. The electrorheological fluid composition shows a large change in viscosity and the small current properties under an applied electric field, and excellent fluidity and dispersion stability in an absence of an applied electric field.

Electrorheological fluid composition comprising an electrically

A method for the production of a fluorine-containing aromatic compound is provided which allows the relevant reaction to proceed in a standard reaction vessel such as, for example, a glass vessel at room temperature under an ambient pressure without requiring provision of such special devices as have been necessary heretofore or adoption of harsh reaction conditions. This method comprises causing an aromatic compound (A) having a cyclic skeletal part of 6 to 16 carbon atoms containing a plurality of --C(.dbd.O)X groups, wherein X stands for a hydrogen atom, a halogen atom, or an alkyl group of 1 to 10 carbon atoms, and having the remaining hydrogen atoms unsubstituted or partly or wholly substituted with at least one species of halogen atom to react with a compound (B) represented by the formula: ##STR1## wherein R.sup.1 and R.sup.2 independently stand for an alkyl group of 1 to 6 carbon atoms or a phenyl group.

Method for production of fluorine-containing aromatic compounds

A third-order nonlinear optical material having a metal oxide contained in a transparent polymer.

Third-order nonlinear optical material and method for production thereof

The water-soluble electrically-conductive polyaniline of this invention is such that the aromatic rings of the skeleton thereof are substituted by an average of 0.1-4 sulfonic acid (salt) groups and an average of 0-3.9 H's or other substituents (providing that the total of the number of sulfonic acids (salts) and that of other substituents is 4) per aromatic ring and 0.025-1 nitrogen atom of each of the nitrogen atoms in the main skeleton is doped with an external dopant. It is obtained by causing polyaniline to react with chlorosulfuric acid and then subjecting the reaction product to hydrolysis. The antistatic agent of this invention is formed by using a water-soluble electrically-conductive polymer which has been doped with an external dopant.

Water-soluble electrically-conductive polyaniline and method for

Carbon black graft polymer, method for production thereof, and use

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Hyogo, Japan

Yoshinobu Asako