Zeon Corporation

Masato Sakamoto

Yasuo Tsunogae

Tomonori Nakashima

Kazunori Taguchi

Masaharu Tokoro

Wolfgang Anton Herrmann

Daisuke Uchida

Arinobu Katada

Shintaro Ikeda

Chikara Katano

Masanobu Shinohara

Kazuhiro Ejiri

Nobuyoshi Emori

Seiji Okada

Hiroshi Kurakata

Kentarou Mori

Karl Oefele

A nitrile group-containing highly saturated copolymer rubber composition containing a nitrile group-containing highly saturated copolymer rubber (A) having a Mooney viscosity [ML, 100&#xb0; C.] of 50 to 200, a nitrile group-containing highly saturated copolymer rubber (B) having a Mooney viscosity [ML, 100&#xb0; C.] of 5 to 45, and staple fibers (C) having an average fiber length of 0.1 to 12 mm is provided. According to the present invention, a nitrile group-containing highly saturated copolymer rubber composition which can give cross-linked rubber which is extremely high in tensile stress and is excellent in low heat buildup property and has good workability can be provided.

Nitrile group-containing highly saturated copolymer rubber composition

An adhesive composition containing a latex of a highly saturated nitrile rubber (A) which has &#x3b1;,&#x3b2;-ethylenically unsaturated nitrile monomer units 10 to 55 wt %, conjugated diene monomer units 25 to 89 wt %, and &#x3b1;,&#x3b2;-ethylenically unsaturated dicarboxylic acid monoester monomer units 1 to 20 wt % and has an iodine value of 120 or less and a polyvalent amine compound (B).

Adhesive composition

A highly saturated nitrile rubber composition containing a carboxyl group-containing highly saturated nitrile rubber (A1) which contains &#x3b1;,&#x3b2;-ethylenically unsaturated nitrile monomer units 15 to 60 wt % and &#x3b1;,&#x3b2;-ethylenically unsaturated dicarboxylic acid monoester monomer units 1 to 60 wt % and has an iodine value of 120 or less, a highly saturated nitrile rubber (A2) which contains &#x3b1;,&#x3b2;-ethylenically unsaturated nitrile monomer units 15 to 60 wt %, has a content of the &#x3b1;,&#x3b2;-ethylenically unsaturated dicarboxylic acid monoester monomer units of 0.9 wt % or less, and has an iodine value of 120 or less, and a polyamide resin (B), a content ratio of the carboxyl group-containing highly saturated nitrile rubber (A1) and the highly saturated nitrile rubber (A2) being a weight ratio of 'carboxyl group-containing highly saturated nitrile rubber (A1):highly saturated nitrile rubber (A2)' of 2:98 to 98:2, is provided.

Highly saturated nitrile rubber composition and cross-linked rubber

A nitrile group-containing copolymer rubber which has a hydroxyl group, carboxyl group, or carbon-carbon double bond at an end carbon atom or on a carbon atom which bonds with the end carbon atom is provided. The nitrile group-containing copolymer rubber is preferably obtained by a metathesis reaction. A nitrile group-containing copolymer rubber which is excellent in cross-linkability can be provided.

Nitrile group-containing copolymer rubber, cross-linkable rubber composition, and cross-linked rubber

A nitrile rubber composition containing a carboxyl group-containing nitrile rubber and an allylamine-based polymer which contains units expressed by the following general formula (1) is provided. (In the general formula (1), R, R, and Rrespectively independently are one selected from a group including a hydrogen atom, alkyl group containing 1 to 4 carbon atoms which may have substituents, aryl group containing 6 to 12 carbon atoms which may have substituents, and halogen atom.).

Nitrile rubber composition and cross-linked rubber

The present invention relates to ruthenium complex compound wherein a heteroatom-containing carbene compound having a six-membered ring structure is bonded to ruthenium and a process for the preparation thereof; a process for producing ring-opened cyclic olefin polymer by subjecting a cyclic olefin to ring-opening metathesis polymerization in the presence of such a ruthenium complex compound; and a process for producing hydrogenated product of ring-opened cyclic olefin polymers by hydrogenating the carbon-carbon double bonds of the above ring-opened polymers. The invention gives hydrogenated product of ring-opened cyclic olefin polymers having physical properties different from those of hydrogenated product of ring-opened polymers of the prior art. Particularly, the use of dicyclopentadiene can give a hydrogenated product of ring-opened cyclic olefin polymer excellent in heat resistance, and this product can be advantageously used as parts or formed products for medical appliances or electrical components.

Ruthenium complexes, process for preparation thereof, and processes for producing open-ring polymer of cycloolefins and hydrogenation products thereof by using the complex as catalyst

A process for producing a hydrogenated product of a polymer prepared through ring-opening polymerization which comprises a polymerization step of polymerizing a cyclic olefin through ring-opening polymerization in the presence of a polymerization catalyst comprising an organoruthenium compound or an organoosmium compound to prepare a polymer, and a hydrogenation step of adding a hydrogenation catalyst and hydrogen into a polymerization system resulting from the polymerization step to hydrogenate the carbon-carbon double bonds of the polymer prepared through the ring-opening polymerization. When the organoruthenium compound- or organoosmium compound-containing catalyst further comprises a carbene compound, the catalyst exhibits a higher activity for the ring-opening polymerization.

Process for producing hydrogenated product of cyclic olefin polymer prepared through ring-opening polymerization

A ring-opened metathesis copolymer formed by the ring-opening metathesis copolymerization of a cycloolefin monomer having a carboxylic anhydride group selected from bicycloheptene derivatives, tetracyclododecene derivatives and hexacycloheptadecene derivatives with a cycloolefin monomer selected from bicycloheptene derivatives, tetracycloheptene derivatives and hexacycloheptene derivatives; and a hydrogenation product of the copolymer. This copolymer is produced by using a polymerization catalyst comprises an organoruthenium compound having a heterocyclic carbene compound as a ligand. The ring-opened metathesis copolymer and the hydrogenation product thereof have a low dielectric constant, a low water absorption, a high adhesion to metals and a high heat resistance.

Copolymer formed by ring-opening polymerization, product of hydrogenation of copolymer formed by ring-opening polymerization, and process for producing these

Using a polymerization catalyst comprising as a main ingredient a metal compound containing a transition metal of group of the periodic table and having at least one imide group and at least two substituent (A) selected from the group consisting of an alkoxy group, an aryloxy group, an alkylamide group and an arylamide group, a polycyclic norbornene monomer is polymerized to give a ring-opened norbornene polymer having a weight average molecular weight of 500 to 1,000,000 as expressed in terms of polystyrene and a melting point of 140&deg; C. or higher. This polymer is hydrogenated to give a hydrogenated product having a melting point of 140&deg; C. or higher.

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Tokyo, Japan

Masato Sakamoto