Daikin Industries, Ltd.

Kyoto University

Dow Corning Corporation

Greene, Tweed of Delaware, Inc.

Greene, Tweed Technologies, Inc.

Tatsuya Morikawa

Mitsuru Kishine

Masanori Kitaichi

Junpei Terada

Daisuke Ota

Shoji Fukuoka

Meiten Koh

Shigeru Morita

Yutaka Ueta

Manabu Fujisawa

Kazuyoshi Kawasaki

Hirokazu Komori

Yoshiyuki Tanaka

Toshio Sogabe

Tsuyoshi Noguchi

Takafumi Yamato

Hideya Saito

Satoshi Tokuno

Katsuki Fujiwara

Susumu Kitagawa

Kazuhiro Yamamura

Etsuo Minamino

Tomizo Sota

Mitsuhiro Otani

Mitsuo Tsukamoto

Masakazu Higuchi

Masao Otsuka

Jiazhong Luo

Mana Shimokawa

Tetsuo Shimizu

Hiroyuki Tanaka

Tomohiro Iimura

Peter Cheshire Hupfield

Katsuhiko Imoto

Yoshihiro Shirai

Hiroshi Aihara

Satoshi Kawai

Masayuki Hayashi

Koji Matsumoto

Terada Junpei

Morita Shigeru

The present invention provides a hose excellent in mechanical properties at high temperatures. The hose of the present invention comprises a cross-linked fluororubber layer obtainable by cross-linking a fluororubber composition containing a fluororubber (A) and a carbon black (B). The cross-linked fluororubber layer has a loss modulus E&#x2033; of 400 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test (measurement temperature: 160&#xb0; C., tensile strain: 1%, initial force: 157 cN, frequency: 10 Hz).

Hose

The method according to this disclosure is a method for separating an unsaturated hydrocarbon having 2 or 3 carbon atoms and a halogenated unsaturated carbon compound formed by replacing at least one of hydrogen atoms included in the unsaturated hydrocarbon with a fluorine atom, from each other and is a method for selectively adsorbing either the unsaturated hydrocarbon or the halogenated unsaturated carbon compound by a porous coordination polymer that includes a metallic ion having a valence of 2 to 4 and an aromatic anion having 1 to 6 aromatic ring(s).

Separation method for halogenated unsaturated carbon compound

An aqueous perfluoroelastomer dispersion and method for producing a perfluoroelastomer using a specific fluorosurfactant and capable of achieving a sufficient number of particles and a sufficient polymerization rate. The method includes providing an aqueous dispersion containing perfluoroelastomer particles by emulsion-polymerizing a perfluoromonomer in an aqueous medium in the presence of a specific fluorosurfactant in an amount of 2 parts by mass or more for 100 parts by mass of the aqueous medium.

Method for producing aqueous perfluoroelastomer dispersion, and method for producing perfluoroelastomer

There is provided a curable fluorine-containing polymer composition which is quickly cured at relatively low temperatures by hydrosilylation reaction and provides a coating film which has high hardness, excellent solvent resistance and flexibility. The curable fluorine-containing polymer composition comprises a fluorine-containing polymer comprising a fluorinated ethylenic monomer unit and a non-fluorinated ethylenic monomer unit, in which a part or the whole of the non-fluorinated ethylenic monomer units is a unit represented by the formula: wherein Ris hydrogen or methyl; Ris a hydrocarbon group having ethylenic C&#x2550;C; X is &#x2014;C(O)NH&#x2014; or &#x2014;C(O)&#x2014;; Ris &#x2014;O&#x2014;, &#x2014;O[CH(R)]O&#x2014;, &#x2014;(CH)O&#x2014;, &#x2014;OC(O)&#x2014;(CH)O&#x2014; or &#x2014;(CH)OC(O)&#x2014;(CH)O&#x2014;, where Ris &#x2014;H, &#x2014;OH, &#x2014;CHOH or &#x2014;O&#x2014;X&#x2014;R, a siloxane compound having hydrogen atom bonded to silicon atom, and a catalyst for hydrosilylation reaction.

Curable fluorine-containing polymer composition

The present invention includes crosslinked perfluoroelastomeric compositions and molded articles formed from a cross-linkable perfluoroelastomeric composition having a first curable perfluoropolymer having a cure site monomer and a second perfluoropolymer having a cure site monomer. The molar ratio of the tetrafluoroethylene monomer to perfluoroalkylvinyl ether in one perfluoropolymer is about 0 to 100 to about 65 to 35 in the perfluoropolymer. The molar ratio of the tetrafluoroethylene monomer to the perfluoroalkylvinyl ether monomer in the second polymer is about 65:35 to about 95:5 in the second perfluoropolymer. The composition further includes a curative. One fluorine-containing elastomer composition herein, having a short crosslinking time, has perfluoroelastomers (A) having a tetrafluoroethylene unit, a perfluoralkylvinyl ether unit (a) and a monomer unit (b) having at least one kind selected from the group consisting of a nitrile group, a carboxyl group and an alkoxycarbonyl group, wherein the composition has two or more kinds of perfluoroelastomers (A) having differing contents of perfluoroalkylvinyl ether unit (a).

Perfluoroelastomer compositions and methods of preparing same

To provide a sealing material which is excellent in sealability under high-temperature conditions as well as crack resistance at high temperatures and high compression. A sealing material comprising a cross-linked fluororubber layer obtainable by cross-linking a fluororubber composition containing a fluororubber (A) and a carbon black (B), the cross-linked fluororubber layer having a loss modulus E&#x2033; of 600 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test under conditions of measurement temperature: 160&#xb0; C., tensile strain: 1%, initial force: 157 cN, and frequency: 10 Hz.

Sealing material

There is provided a perfluoroelastomer composition having a low glass transition temperature and excellent cold resistance and heat resistance and comprising a perfluoroelastomer comprising a tetrafluoroethylene unit (a), a perfluoro vinyl ether unit (b) and a cure site unit (c) having nitrile group, carboxyl group and/or alkoxycarbonyl group as a cure site, wherein the perfluoro vinyl ether unit (b) is contained in an amount of 8 to 23% by mole in the perfluoroelastomer.

Perfluoroelastomer composition

The present invention provides a complex-shaped fluororubber formed product having excellent demoldability in molding. The complex-shaped fluororubber formed product of the present invention comprises a cross-linked fluororubber layer obtainable by cross-linking a fluororubber composition containing a fluororubber (A) and a carbon black (B). The cross-linked fluororubber layer has a loss modulus E&#x2033; of 400 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test (measurement temperature: 160&#xb0; C., tensile strain: 1%, initial force: 157 cN, frequency: 10 Hz).

Complex-shaped fluororubber formed product

The present invention provides a belt excellent in mechanical properties at high temperatures. The belt of the present invention comprises a cross-linked fluororubber layer obtainable by cross-linking a fluororubber composition containing a fluororubber (A) and a carbon black (B). The cross-linked fluororubber layer has a loss modulus E&#x2033; of 400 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test (measurement temperature: 160&#xb0; C., tensile strain: 1%, initial force: 157 cN, frequency: 10 Hz).

Belt

The invention provides a fluoropolymer composition capable of improving the characteristics of the cured material obtained therefrom. A fluoropolymer composition comprising a methylene group-containing fluoropolymer (A) and a hydrosilylation catalyst (B), wherein the methylene group-containing fluoropolymer (A) has methylene group-containing repeating units in the main chain thereof and is capable of hydrosilylation in the presence of the hydrosilylation catalyst (B) and one terminus of the chain is a carbon-carbon double bond or an Si&#x2014;H group and the other terminus of the chain is an Si&#x2014;H group or a carbon-carbon double bond.

Fluorine-containing polymer composition and cured body

A fluorine-containing elastomer composition assuring a low compression set and comprising a perfluoroelastomer (A) comprising (a) 18 to 33% by mole of a perfluoro(alkyl vinyl ether) unit, (b) 0.3 to 0.6% by mole of a monomer unit having at least one selected from the group consisting of a nitrile group, a carboxyl group and an alkoxycarbonyl group and (c) a tetrafluoroethylene unit.

Fluorine-containing elastomer composition and sealing material made of same

The present invention has for its object to provide a fluorocopolymer which is available at low cost, has fluidity at room temperature, and is curable, a method of producing the same copolymer and a curable composition having good processability and in situ moldability. The present invention is directed to a fluorocopolymer which is fluid at room temperature and curable, and which is obtainable from a trifluorovinyl group-containing monomer with an ethylenically unsaturated double bond moiety being a trifluorovinyl group.

Fluorocopolymer, process for producing fluorocopolymer, fluorocopolymer curable composition, and cured object

The present invention provides a graft or a block polymer in which a fluorine rubber and a silicone rubber are chemically bonded. The present invention is a graft or a block polymer comprising at least one kind of a silicone rubber segment and at least one kind of a fluorine elastomer segment. Furthermore, it is preferable that a fluorine containing elastomer segment is an elastomer segment comprising vinylidene fluoride or an elastomer segment comprising tetrafluoroethylene and that a silicone rubber segment has a unit of dimethylsiloxane and/or methyl-3,3,3-trifluoropropylsiloxane.

Fluorine-containing graft or block polymer

Growing community of inventors

Settsu, Japan

Tatsuya Morikawa