Toyoda Gosei Co., Ltd.

Tokyo Institute of Technology

Akishige Seo

Naoki Iwase

Toshikazu Takata

Hideyuki Imai

Yasuhito Koyama

Hidekazu Kurimoto

Yusuke Katono

Kenichiro Kaneko

Toyokazu Tsutsuba

Naoyuki Akahori

Mitsue Tanaka

Kaori Miura

Yoshiaki Mase

Hideaki Kondo

Morio Yonekawa

A crosslinked rubber composition contains ethylene-propylene-diene copolymer rubber crosslinked with a rotaxane compound having a cyclic molecule and an axial molecule penetrating through the cyclic molecule. In the crosslinked rubber composition, the ethylene-propylene-diene copolymer rubber contains vinylnorbornene, dicyclopentadiene, or tetrahydroindene as a diene component, and the rotaxane compound has a nitrile oxide group on the cyclic molecule and one end of the axial molecule, and the cyclic molecule is crown ether.

Crosslinked rubber composition and production method therefor

A method of producing a sealing member for a fuel cell includes: setting a base material made of a modified polypropylene in a mold; bringing a hydrosilicone crosslinked ethylene/&#x3b1;-olefin/non-conjugated diene copolymer into contact with the base material and performing molding in the mold; and vulcanizing the hydrosilicone crosslinked ethylene/&#x3b1;-olefin/non-conjugated diene copolymer and at the same time, bonding the hydrosilicone crosslinked ethylene/&#x3b1;-olefin/non-conjugated diene copolymer and the base material by vulcanization, in the mold with a molding temperature set to a temperature that is higher than a vulcanization start temperature of the hydrosilicone crosslinked ethylene/&#x3b1;-olefin/non-conjugated diene copolymer and lower than a melting point of the modified polypropylene.

Method of producing sealing member for fuel cell and rubber composition for molding

An air hose for an automobile, which has a two-layered structure of an inner tube made of an NBR composition and an outer cover made of a CSM composition, wherein the NBR composition satisfies (A) and (B) below: (A) an unvulcanized NBR in which an amount of AN is 30 to 50 and a Mooney viscosity (ML (1+4) 100&#xb0; C.) is 50 to 90, is vulcanized in the presence of 0.5 to 7.0 parts by mass of a thiuram compound serving as a vulcanization accelerator, 0 to 2.5 parts by mass of 4,4'-dithio dimorpholine, and 2.0 to 7.0 parts by mass of a thiazole compound to 100 parts by mass of the unvulcanized NBR; and (B) 5 to 50 parts by mass of a plasticizer having a molecular weight of 700 to 2,000 is blended to 100 parts by mass of the unvulcanized NBR.

Air hose for automobile

To provide a polymer alloy formed of a non-polar rubber and a polar rubber, and a rubber product, which are improved in ozone resistance (weather resistance) while having oil resistance and can achieve high mechanical strength (in particular, tensile strength), and a production method thereof. A rubber product in which an organic peroxide or other cross-linking agent is used to cross-link a polymer alloy comprising: a modified rubber in which EPDM, NR, or another non-polar rubber having a non-conjugated double bond is modified with 2-methoxy-1-naphthonitrile oxide, 2,6-dimethoxybenzonitrile oxide, or another nitrile oxide of an aromatic nitrile oxide derivative; and nitrile rubber, acrylic rubber, or another polar rubber.

Polymer alloy and rubber product, and production method thereof

The present invention provides a crosslinker used for crosslinking a polymer material having, in the molecule thereof, a multiple bond reactable with a nitrile oxide, the crosslinker including a bifunctional nitrile oxide having an aromatic nitrile oxide derivative structure in which one hydrogen atom of an aromatic ring is substituted with a nitrile oxide group and all hydrogen atoms at an ortho-position of the nitrile oxide group are substituted with a substituent other than a nitrile oxide group, wherein two such aromatic nitrile oxide derivative structures are bonded to either two oxy groups of a di-oxy structure having the two oxy groups or two carbonyl groups of a di-carbonyl structure having the two carbonyl groups.

Crosslinker, crosslinked polymer material, and production method of the crosslinked polymer material

The present invention provides a production method of a crosslinkable polymer material which includes adding 2 -(glycidyloxy)-1-naphthonitrile oxide or 2-[5 -(ethoxycarbonyl)pentyloxy]-1-naphthonitrile oxide by an addition reaction to a polymer material having a multiple bond to which a nitrile oxide is added by an addition reaction so as to introduce a glycidyl group or an ethoxycarbonyl group into the polymer material.

Crosslinkable polymer material, crosslinked polymer material, and production method thereof

The present invention provides a production method of a modified polymer material produced by modifying a polymer material having in a molecule thereof a multiple bond that reacts with a nitrile oxide, includes reacting the polymer material with an aromatic nitrile oxide derivative having a substituent at an ortho-position of a nitrile oxide group of an aromatic nitrile oxide in which the nitrile oxide group is bonded to an aromatic ring.

Growing community of inventors

Kiyosu, Japan

Akishige Seo