Jsr Corporation

Eneos Materials Corporation

Michitaka Kaizu

Noboru Oshima

Takuya Sano

Toshihiro Hayashi

Takashi Imamura

Katsutoshi Sawada

Hirofumi Senga

Satoshi Ebata

Kenzo Ohkita

Takumi Adachi

Toshimitsu Kikuchi

Yooichiroh Maruyama

Toshiyuki Hayakawa

Takato Fukumoto

Yuto Sakagami

A cross-linked product obtained through crosslinking a polymer composition that contains a rubber component, an inorganic filler and a cross-linking agent and that satisfies conditions (a) to (c): (a) the rubber component contains a conjugated diene-based polymer (A) having, when composition ratios (molar ratios) in the conjugated diene-based polymer (A) of structural units represented by formulae (1) to (4) are p, q, r, and s, respectively, a value α represented by formula (i) of 0.80 or more and 0.97 or less; (b) a blending ratio of the conjugated diene-based polymer (A) is 10% by mass or more relative to a total amount of the rubber component; and (c) a blending ratio of the inorganic filler is 40 to 150 parts by mass relative to 100 parts by mass of the rubber component, wherein the Tg of the cross-linked product is −25° C. or lower.

Cross-linked product and tire

A hydrogenated conjugated diene-based polymer which has a structure formed by bonding a nitrogen-containing compound having two or more alkoxysilyl groups and two or more nitrogen atoms with a plurality of conjugated diene-based polymer chains, wherein: when a composition ratio (molar ratio) in the hydrogenated conjugated diene-based polymer of each of a structural unit represented by formula (1), a structural unit represented by formula (2), a structural unit represented by formula (3), and a structural unit represented by formula (4) is p, q, r, and s, respectively, a value a represented by formula (i) is 0.80 or more and 0.97 or less, and an equilibrium storage modulus E' of the hydrogenated conjugated diene-based polymer is 2.4 MPa or more,α=(+(0.5×))/(+(0.5×)+)  (i)

Hydrogenated conjugated diene polymer, polymer composition, crosslinked body and tire

A process for producing a cycloolefin addition polymer in which one or more cycloolefin monomers can be (co)polymerized by addition polymerization with a small palladium catalyst amount to produce a cycloolefin addition (co)polymer while attaining high catalytic activity. The process for cycloolefin addition polymer production is characterized by addition-polymerizing one or more cycloolefin monomers comprising a cycloolefin compound represented by a specific formula in the presence of a multi-component catalyst comprising (a) a palladium compound and (b) a specific phosphorus compound.

Process for producing cycloolefin addition polymer

The present invention provides a cyclic olefin addition copolymer which has a reactive silyl group having a specific structure, excels in optical transparency, heat resistance, and adhesion, and is capable of producing a crosslinked product having improved dimensional stability, solvent resistance, and chemical resistance. The present invention also provides a process for producing the cyclic olefin addition copolymer, a crosslinking composition, a crosslinked product and a process for producing the same, and an optically transparent material (transparent resin film) comprising the cyclic olefin addition copolymer. The optically transparent material excels in optical transparency and heat resistance, exhibits improved dimensional stability, adhesion, solvent resistance, and chemical resistance, and is capable of improving fragility and preventing occurrence of cracks in the film.

Cyclic olefin addition copolymer and process for producing same, crosslinking composition, crosslinked product and process for producing same, and optically transparent material and application thereof

CYCLIC OLEFIN ADDITION COPOLYMER AND PROCESS FOR PRODUCING SAME, CROSSLINKING COMPOSITION, CROSSLINKED PRODUCT AND PROCESS FOR PRODUCING SAME, AND OPTICALLY TRANSPARENT MATERIAL AND APPLICATION THEREOF

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Tokyo, Japan

Michitaka Kaizu