Abstract: A rubber composition includes a carboxyl group-containing nitrile rubber of which iodine value is 120 or less, a polyetherester plasticizer, and a metallic compound, wherein an amount of stearic acid adsorbed by the metallic compound is 80 mg/g or more and 300 mg/g or less.

Abstract: A cross-linkable nitrile rubber composition that includes a nitrile group-containing copolymer rubber (A), silica (B1), clay (B2), calcium carbonate (B3), and a polyamine-based cross-linking agent (C). A total amount of the silica (B1), the clay (B2), and the calcium carbonate (B3) is 150 to 200 parts by weight with respect to 100 parts by weight of the nitrile group-containing copolymer rubber (A), a content ratio of the silica (B1) is greater than 0 wt % and 50 wt % or less with respect to the total amount of the silica (B1), the clay (B2), and the calcium carbonate (B3), and a content ratio of the clay (B2) and the calcium carbonate (B3) is 30:70 to 90:10 in a weight ratio of “clay (B2):calcium carbonate (B3)”.

Abstract: A cross-linkable nitrile rubber composition that includes a nitrile group-containing copolymer rubber (A), silica (B1), clay (B2), calcium carbonate (B3), and a polyamine-based cross-linking agent (C). A total amount of the silica (B1), the clay (B2), and the calcium carbonate (B3) is 150 to 200 parts by weight with respect to 100 parts by weight of the nitrile group-containing copolymer rubber (A), a content ratio of the silica (B1) is greater than 0 wt % and 50 wt % or less with respect to the total amount of the silica (B1), the clay (B2), and the calcium carbonate (B3), and a content ratio of the clay (B2) and the calcium carbonate (B3) is 30:70 to 90:10 in a weight ratio of “clay (B2):calcium carbonate (B3)”.

Abstract: A nitrile rubber composition including: a carboxyl group-containing nitrile rubber containing 5 to 30% by weight of an ?,?-ethylenically unsaturated nitrile monomer unit, 0.1 to 10% by weight of a carboxyl group-containing monomer unit, 15 to 60% by weight of an ?,?-ethylenically unsaturated monocarboxylic acid ester monomer unit, and 20 to 64.9% by weight of a conjugated diene monomer unit and having an iodine value of 120 or less; and a reactive silicone oil.

Abstract: A disclosed crosslinkable rubber composition includes a carboxyl group-containing nitrile rubber (A) containing a halogen or a halogen compound, and having an iodine value of 120 or less; a polyamine-based crosslinking agent (B); and a metal-based acid acceptor (C).

Abstract: A rubber composition includes a carboxyl group-containing nitrile rubber of which iodine value is 120 or less, a polyetherester plasticizer, and a metallic compound, wherein an amount of stearic acid adsorbed by the metallic compound is 80 mg/g or more and 300 mg/g or less.

Abstract: A crosslinkable rubber composition includes a carboxyl group-containing highly saturated nitrile copolymer rubber, and silica treated with silicone oil.

Abstract: A disclosed crosslinkable rubber composition includes a carboxyl group-containing nitrile rubber (A) containing a halogen or a halogen compound, and having an iodine value of 120 or less; a polyamine-based crosslinking agent (B); and a metal-based acid acceptor (C).

Abstract: A cross-linkable nitrile rubber composition contains a carboxyl group-containing highly saturated nitrile rubber, a resin, and a polyamine cross-linking agent. The content of the carboxyl group-containing highly saturated nitrile rubber is 30 parts by weight or more with respect to 100 parts by weight of the total amount of the carboxyl group-containing highly saturated nitrile rubber and the resin. The cross-linkable nitrile rubber composition is obtained by performing kneading at a temperature equal to or higher than the melting point of the resin.

Abstract: A highly saturated nitrile rubber composition obtained by mixing 7 to 40 wt % of a carboxyl group-containing highly saturated nitrile rubber (A1) containing 15 to 60 wt % of ?,?-ethylenically unsaturated nitrile monomer units and 1 to 60 wt % of ?,?-ethylenically unsaturated dicarboxylic acid monoester monomer units and having an iodine value of 120 or less, 10 to 78 wt % of a highly saturated nitrile rubber (A2) containing ?,?-ethylenically unsaturated nitrile monomer units in 15 to 60 wt %, having a content of ?,?-ethylenically unsaturated dicarboxylic acid monoester monomer units of 0.9 wt % or less, and having an iodine value of 120 or less, and 15 to 50 wt % of a polyester resin (B) at a temperature of a melting point of the polyester resin (B) or more is provided.

Abstract: A nitrile rubber composition including: a carboxyl group-containing nitrile rubber containing 5 to 30% by weight of an ?,?-ethylenically unsaturated nitrile monomer unit, 0.1 to 10% by weight of a carboxyl group-containing monomer unit, 15 to 60% by weight of an ?,?-ethylenically unsaturated monocarboxylic acid ester monomer unit, and 20 to 64.9% by weight of a conjugated diene monomer unit and having an iodine value of 120 or less; and a reactive silicone oil.

Abstract: A nitrile rubber composition comprising a carboxyl group-containing highly saturated nitrile rubber (A) containing an ?,?-ethylenically unsaturated nitrile monomer unit in a content of 5 to 60 wt % and an ?,?-ethylenically unsaturated dicarboxylic acid monoester monomer unit in a content of 1 to 30 wt %, and having an iodine value of 120 or less, and a phenol compound (B) represented by the following general formula (1): (In the general formula (1), R1 to R5 are each independently a hydrogen atom, a heteroatom-free alkyl group having 1 to 8 carbon atoms, or a heteroatom-containing alkyl group having 1 to 15 carbon atoms, and at least one of R1 to R5 is a heteroatom-containing alkyl group having 1 to 15 carbon atoms.

Abstract: Provided is a method for producing a cross-linkable rubber composition, comprising: a first step of providing a carboxyl group-containing nitrile copolymer rubber (A) having an iodine value of 120 or less; a second step of mixing an acrylic rubber (b1) with an aromatic polyamine cross-linking agent (b2) to obtain a masterbatch (B); and a third step of mixing the carboxyl group-containing nitrile copolymer rubber (A) with the masterbatch (B).

Abstract: A cross-linked rubber is excellent in both fuel oil resistance and cold resistance. A cross-linkable rubber composition contains: a nitrile group-containing copolymer rubber [A] including less than 30 wt % ?,?-ethylenically unsaturated nitrile monomer units (a1), conjugated diene monomer units (b1), and ?,?-ethylenically unsaturated dicarboxylic acid monoester monomer units (d1), wherein at least part of the conjugated diene monomer units (b1) is hydrogenated; a nitrile group-containing copolymer rubber [B] including not less than 30 wt % ?,?-ethylenically unsaturated nitrile monomer units (a2) and conjugated diene monomer units (b2), wherein at least part of the conjugated diene monomer units (b2) may be hydrogenated; and an amine-based cross-linking agent.

Abstract: A cross-linkable nitrile rubber composition contains a carboxyl group-containing highly saturated nitrile rubber, a resin, and a polyamine cross-linking agent. The content of the carboxyl group-containing highly saturated nitrile rubber is 30 parts by weight or more with respect to 100 parts by weight of the total amount of the carboxyl group-containing highly saturated nitrile rubber and the resin. The cross-linkable nitrile rubber composition is obtained by performing kneading at a temperature equal to or higher than the melting point of the resin.

Abstract: A highly saturated nitrile rubber composition obtained by mixing 7 to 40 wt % of a carboxyl group-containing highly saturated nitrile rubber (A1) containing 15 to 60 wt % of ?,?-ethylenically unsaturated nitrile monomer units and 1 to 60 wt % of ?,?-ethylenically unsaturated dicarboxylic acid monoester monomer units and having an iodine value of 120 or less, 10 to 78 wt % of a highly saturated nitrile rubber (A2) containing ?,?-ethylenically unsaturated nitrile monomer units in 15 to 60 wt %, having a content of ?,?-ethylenically unsaturated dicarboxylic acid monoester monomer units of 0.9 wt % or less, and having an iodine value of 120 or less, and 15 to 50 wt % of a polyester resin (B) at a temperature of a melting point of the polyester resin (B) or more is provided.

Abstract: A cross-linked rubber is excellent in both fuel oil resistance and cold resistance. A cross-linkable rubber composition contains: a nitrile group-containing copolymer rubber [A] including less than 30 wt % ?,?-ethylenically unsaturated nitrile monomer units (a1), conjugated diene monomer units (b1), and ?,?-ethylenically unsaturated dicarboxylic acid monoester monomer units (d1), wherein at least part of the conjugated diene monomer units (b1) is hydrogenated; a nitrile group-containing copolymer rubber [B] including not less than 30 wt % ?,?-ethylenically unsaturated nitrile monomer units (a2) and conjugated diene monomer units (b2), wherein at least part of the conjugated diene monomer units (b2) may be hydrogenated; and an amine-based cross-linking agent.

Abstract: A nitrile rubber composition contains a carboxyl group-containing nitrile rubber with an iodine value of 120 or less (A) and bituminous coal (B). The bituminous coal (B) has a carbon purity of preferably 60 to 95 wt % and further has a volume average particle size of preferably 2 to 10 ?m. It is possible to provide a nitrile rubber composition which can give a cross-linked rubber which is excellent in normal physical properties and further is superior in compression set resistance and oil resistance (in particular, oil resistance to lubricating oil and fuel oil).

Abstract: An electrochemical element electrode for obtaining electrochemical elements having both low internal resistance and high capacitance, and a secondary battery and an electric double layer capacitor using the electrode are provided. An electrochemical element electrode which is made by forming an active material layer on a collector, and the active material layer is formed by press-molding composite particles with high strength at moderate pressure not to crush the composite particles under pressure, while the structures of the composite particles being maintained, to bond the composite particles together, wherein the composite particles comprise an electrode active material, an electric conductive material, a dispersible binder and a soluble resin, in which the electrode active material and the electric conductive material are bonded by the dispersible binder. By use of this electrode, an electric double layer capacitor or a secondary battery is obtained.

Abstract: An electrode material for an electric double layer capacitor, where a moldability is good, a flexion resistance and a cohesiveness to a current collector after molding into an active material layer are high and an internal resistance can be reduced, an electrode for an electric double layer capacitor obtained using the electrode material, and a capacitor are provided. The electrode material for the electric double layer capacitor is composed of a mixture particle containing a binder and an electrode active material, and in said mixture particle, 50 area % or more of a surface of said mixture particle has been coated with the binder.