Kureha Kagaku Kogyo K.k.

Kureha Kagaku Kogyo Kabushiki Kaisha

Kureha Corporation

Kureha Chemical Industry Company, Limited

Kureha Kagaku Kagyo K.k.

Kureha Kagaku Kogho K.k.

Masahito Tada

Takayuki Katto

Takashi Kaneko

Yoshikatsu Satake

Ken Kashiwadate

Shinji Yamamoto

Zenya Shiiki

Toshiya Mizuno

Hiroyuki Endo

Naomitsu Nishihata

Keiichiro Suzuki

Hiroyuki Sato

Kiyomi Ohuchi

Yo Iizuka

Toshitaka Kouyama

Kazuyuki Suzuki

Takumi Katsurao

Chikau Onodera

Yasuhiro Suzuki

Tsukasa Ikeda

Shiro Arai

Sadao Nakanishi

The present invention provides a polyvinylidene fluoride copolymer capable of forming a uniform film, a solution of the copolymer and a thin film comprising the polyvinylidene fluoride copolymer. The polyvinylidene fluoride copolymer of the present invention is characterized in that the ratio of the scattered-light intensity (I) for a 15% solution of the polyvinylidene fluoride copolymer in dimethylformamide solvent to the scattered-light intensity (I) for dimethylformamide, (I/I), is 10 or lower. The polyvinylidene fluoride copolymer solution comprises the polyvinylidene fluoride copolymer and an organic solvent capable of dissolving the copolymer.

Process for preparing polyvinylidene fluoride copolymer

The invention provides an IC socket of synthetic resin, whose surface resistivity is strictly controlled to the desired level and which is much more improved in terms of electrical insulation properties, mechanical properties, heat resistance, chemical resistance, dimensional stability, etc. The IC socket is obtained by molding or otherwise forming a thermoplastic resin composition comprising 40 to 94% by mass of a thermoplastic resin, 5 to 30% by mass of a carbon precursor having a volume resistivity of 10to 10&#x3a9;&#xb7;cm and 1 to 30% by mass of an electrical conductive filler having a volume resistivity of less than 10&#x3a9;&#xb7;cm.

IC socket

A resin composition comprises a resin component containing 40 to 99% by mass of a poly(aryl ketone) and 1 to 60% by mass of a poly(arylene sulfide), and 0.1 to 5 parts by mass, per 100 parts by mass of the resin component, of at least one thermosetting imide resin selected from the group consisting of a polyfunctional unsaturated imide compound and its thermoset product. The resin composition is improved in terms of compatibility, moldability or formability, melt flowability, mechanical properties, etc. while maintaining high levels of various properties such as heat resistance, flame retardancy, chemical resistance and dimensional stability.

Resin composition of poly(aryl ketone), poly(arylene sulfide) and thermosetting imide resine

The invention provides a solid polymer fuel cell separator that is molded or formed of a resin composition comprising a thermoplastic resin, a conductive carbon black having a bulk density of at least 0.3 g/ml and a DBP oil absorption of up to 150 ml/100 g and optionally a conductive filler having a volume resistivity of less than 1 &#x3a9;&#xb7;cm. The invention also provides a solid polymer fuel cell separator production process involving injection molding of the resin composition.

Separator for solid polymer fuel cells, and production process thereof

A poly(arylene sulfide) resin composition comprising a poly(arylene sulfide) and, as a modifier, an organic amide compound compounded in a proportion of 0.2 to 10 parts by weight per 100 parts by weight of the poly(arylene sulfide).

Polyarylene sulfide resin composition

A thermoplastic resin composition is formed by mixing (A) 30-84.9 wt. % of a crystalline thermoplastic resin, (B) 15-65 wt. % of a graft copolymer obtained by graft-polymerizing an ethylenically unsaturated monomer onto a rubber trunk polymer having an alkylene oxide group and (C) 0.1-5 wt. % of an anionic surfactant. As a result, it is possible to obtain a non-black thermoplastic resin composition which shows an antistatic property at a level suitable for use as an ESD (electrical static dissipative) and can be colored into arbitrary hues.

Thermoplastic resin composition

An optical pickup device-holding container, which is formed from a resin composition comprising a poly(arylene sulfide) (A) and an inorganic filler (B) and having a thermal conductivity of at least 1 W/mK; and an optical pickup device in which at least a light source, an objective lens and a light-receiving part are held in the holding container.

Optical pickup device holding container

A moderately conductive synthetic resin composition comprising a synthetic resin (A), a carbon precursor (B) and at least one conductive filler (C) selected from the group consisting of a non-fibrous conductive filler and a metallic fibrous material, both, having a volume resistivity lower than 10 &OHgr;&middot;cm, and a moderately conductive synthetic resin composition comprising a synthetic resin (A), a carbon precursor (B) and carbon fiber (E).

Synthetic resin composition

A thermoplastic resin composition improved in compatibility, molding or forming ability, melt-flow properties and mechanical properties, which comprises 100 parts by weight of a resin component containing 40 to 99 wt. % of a poly(arylene sulfide) (A) and 1 to 60 wt. % of polyamide-imide (B), and 0.01 to 10 parts by weight of a silane compound (C) containing at least one functional group selected from the group consisting of amino, ureido, epoxy, isocyanate and mercapto groups.

A coil part which is obtained by sealing at least part of the periphery of a coil with a conductor wound on a bobbin with a high heat-conductive and magnetism-impermeable resin composition, and can efficiently guide out a magnetic flux generated to the outside and efficiently radiate heat generated to the outside.

Coil component

A resin composition comprising a synthetic resin and a powdered magnetic material, wherein (1) the powdered magnetic material is soft ferrite powder having a rate of permeability change by temperature ranging from &minus;0.040 to 0.010%/&deg; C. in a temperature range of from 20&deg; C. to 80&deg; C. and an average particle diameter ranging from 2 to 1,000 &mgr;m, and (2) the powdered magnetic material is contained in a proportion of 50 to 1,400 parts by weight per 100 parts by weight of the synthetic resin, and a molded or formed product which is formed from the resin composition and exhibits a permeability stable to changes in environmental temperature.

Resin composition and molded or formed product

A soft magnetic composite material obtained by dispersing a powdered magnetic material (A) composed of soft ferrite in a polymer (B), wherein the powdered magnetic material (A) is a powdered magnetic material of a random form obtained by grinding a sintered magnetic material, and the average particle size (d ) of the powdered magnetic material (A) is greater than the average crystal grain size (d ) of the sintered magnetic material by at least twice.

Soft magnetic composite material

Resin composition

The disclosure describes a flame-resisting resin composition comprising: (A) 90 to 99.5% by weight of a polyarylene sulfide; and (B) 0.5 to 10% by weight of a graft copolymer composed of an olefinic copolymer (a) having 30 to 59% by weight (based on the weight of said graft copolymer) of an .alpha.-olefin repeating unit and a glycidyl ester residue repeating unit of an .alpha.,.beta.-unsaturated mono-carboxylic acid, and at least one of polymers (b) having the repeating unit represented by the following formula (I): said olefinic copolymer (a) being branched or crosslinked with at least one of the polymers (b), ##STR1## wherein R represents a hydrogen atom or a lower alkyl group having from 1 to about 6 carbon atoms, X represents a benzyl group, --COOCH.sub.3, --COOC.sub.2 H.sub.5, --COOC.sub.4 H.sub.9, --COOCH.sub.2 CH(C.sub.2 H.sub.5)C.sub.4 H.sub.9, --CN, a phenyl group or a maleimide group.

Flame-resisting resin composition

A resin magnetic compound is disclosed, comprising (i) from 65 to 77% by weight of a magnetic powder having been surface treated with from 0.01 to 5% by weight, based on the magnetic powder, of a mercaptosilane represented by the following formula (I) or a hydrolysis product of the mercaptosilane:

Growing community of inventors

Fukushima, Japan

Masahito Tada