Daikin Industries, Ltd.

Daikin Kogyo Co., Ltd.

Kaikin Kogyo Co., Ltd.

Yutaka Ueta

Masayasu Tomoda

Masanori Kitaichi

Masahiko Oka

Yasuyoshi Furukawa

Shigeru Morita

Shoji Kawachi

Daisuke Ota

Takeshi Suzuki

Shoji Fukuoka

Mitsuru Kishine

Tatsuya Morikawa

Junpei Terada

Kazuyoshi Kawasaki

Hiroyuki Tanaka

Masayoshi Tatemoto

Hideo Kano

Nobuyuki Tomihashi

Hideya Saito

Masafumi Akamatsu

Akira Ohmori

Manabu Fujisawa

Satoshi Komatsu

Kazutaka Hosokawa

Tsuneo Nakagawa

Masaru Hirai

Shinichi Nakagawa

Sadashige Irie

Yoshiki Tanaka

Hiroshi Aihara

Yoshihiro Shirai

Katsuhiko Iseki

Satoshi Kawai

Mitsuo Tsukamoto

Yutaka Kometani

Katsuhide Otani

Tetsuya Higuchi

Yasuji Iwasaki

Satoshi Oishi

Koji Matsumoto

Yousuke Nishimura

Masanori Yamashita

Yoshiki Maruya

Singo Tanigawa

Shintarou Ogata

Yoshiko Mori

Settsu Minamino

Tutomu Terada

Takesi Suzuki

Akihiro Nakashima

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

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

The present invention provides a fluororubber composition that has excellent heat resistance and excellent mechanical properties at high temperatures. The fluororubber composition comprises a peroxide cross-linkable fluororubber (A); a carbon black (B); a peroxide cross-linking agent (C); and a low-self-polymerizing cross-linking accelerator (D), wherein to 100 parts by mass of the fluororubber (A), the amount of the carbon black (B) is 5 to 50 parts by mass, the amount of the cross-linking agent (C) is 0.01 to 10 parts by mass, and the amount of the cross-linking accelerator (D) is 2.5 parts by mass or smaller.

Fluororubber 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 present invention provides a method of producing a fluoroelastomer excellent in dispersion stability at low cost, at a high rate of polymerization and in high yields. The present invention is a method of producing a fluoroelastomer comprising an emulsion polymerization of a fluorinated monomer in the presence of a water-soluble radical polymerization initiator, wherein the emulsion polymerization is carried out in the presence of a compound (1) containing a functional group reactive in radical polymerization and a hydrophilic group and a fluorinated compound (2) containing a fluorocarbon group comprising 1 to 6 continuously united carbon atom with fluorine atom directly bound to each of them as well as a hydrophilic group.

Method for producing fluorine-containing elastomer

A process for preparing a fluorine-containing elastomeric copolymer, a vulcanizing agent and a vulcanization accelerator, said process comprising the step of coagulating the copolymer from an aqueous dispersion of the fluorine-containing elastomeric copolymer and drying the resulting coagulate of the copolymer while kneading, wherein a mixture of mutually soluble components consisting of the vulcanizing agent and the vulcanization accelerator is added to the coagulate, can give a fluororubber composition having stable vulcanization physical properties, wherein the vulcanizing agent and the vulcanization accelerator are homogeneously dispersed in the fluororubber.

Process for producing elastic fluorocopolymer composition

A laminate, which is in the form of an O-ring, a square ring, a rubber roll, a diaphragm, a rubber hose, a rubber tube or a vial stopper, comprising a layer of a perfluororubber, a layer of other rubber and an adhesive layer containing a polyfunctional compound which adheres the rubber layers by vulcanization is produced by coating a polyfunctional compound on a surface of at least one of the perfluororubber layer or the other rubber layer, laminating the layers with the coated surface facing the other layer, and vulcanizing the layers to adhere them. Thereby, the adhesion strength between the layer of perfluororubber and the layer of the other rubber is improved.

Perfluororubber laminate and processes for producing the same

A process for preparing a fluorine-containing polymer through emulsion polymerization method which enhances productivity while maintaining excellent physical properties of the fluorine-containing polymer and comprises (a) a first polymerization step for emulsion-polymerizing a fluorine-containing monomer or a mixture of a fluorine-containing monomer and a non-fluorine-containing monomer in an aqueous medium in the presence of a radical polymerization initiator and an emulsifying agent, (b) a dilution step for diluting the obtained aqueous emulsion of polymer particles with water to reduce the number of emulsified polymer particles per unit amount of aqueous medium in the emulsion and a concentration of emulsifying agent, and (c) a second polymerization step for emulsion-polymerizing a fluorine-containing monomer and/or a non-fluorine-containing monomer in the obtained diluted emulsified solution.

Process for preparing fluorine-containing polymer

A fluorine-containing triallyl isocyanurate of the formula &lsqb;I&rsqb;:

Fluorinated triallyl isocyanurates, vulcanizable elastomer compositions containing the same, and method for vulcanization

Fluororubber composition and molded article thereof

Fluororubber copolymer and curable composition thereof

A fluororubber-containing powder coating composition comprising a fluororubber, an adhesion-preventing material and optionally a cross-linking agent, which composition has an particle size of 10 to 2,000 .mu.m and an apparent density of at least 0.2 g/cc, which provides a homogeneous smooth coated film having no or only a small amount of bubbles.

Fluororubber-containing powder coating composition

Vulcanizable fluororubber composition

Growing community of inventors

Settsu, Japan

Yutaka Ueta