Abstract: There are provided a rubber composition simultaneously improving low loss factor and wear resistance as compared with the conventional ones as well as a tire using such a rubber composition. The invention lies in a rubber composition using a modified conjugated diene rubber and being excellent in the low loss factor and wear resistance as well as a tire. The rubber composition of the invention is formed by compounding a filler to a rubber component containing (A) a modified conjugated diene rubber having a cis-bond content in conjugated diene portion of not less than 87% and a vinyl bond content of not more than 2% and containing a functional group reactive with a filler and (B) a modified polymer having a modifying functional group number per 1 molecule of an unmodified polymer of not less than 0.6.

Abstract: This invention provides a polybutadiene capable of improving wear resistance and resistance to crack growth in a rubber composition and a tire, wherein values of e, f and g derived from the following determinant (I): ( 1.7455 0 - 0.0151 - 0.0454 0.4292 - 0.0129 - 0.007 0 0.3746 ) ? ( log 10 ? ( a / d ) log 10 ? ( a / b ) log 10 ? ( a / c ) ) = ( e f g ) ( I ) (wherein a is a mountain peak value around 1130 cm?1 in a transmittance spectrum through Fourier transform infrared spectroscopy (FT-IR), and b is a valley peak value around 967 cm?1, and c is a valley peak value around 911 cm?1, and d is a valley peak value around 736 cm?1) satisfy relationships of equation (II): (Calculated value of cis-1,4 bond)=e/(e+f+g)×100?99 and equation (III): (Calculated value of vinyl bond)=g/(e+f+g)×100?0.

Abstract: A method for preparing a functionalized polymer, the method comprising the steps of (i) polymerizing conjugated diene monomer by employing a lanthanide-based catalyst to form a reactive polymer, and (ii) reacting the reactive polymer with a nitro compound.

Abstract: The method for producing a modified conjugated diene based (co)polymer, according to the present invention comprises (a) obtaining a primarily modified polymer by carrying out a primary modification reaction wherein at least one member selected from the group consisting of an alkoxysilane compound and a silanol compound is introduced into the active alkali metal terminal of a conjugated diene based (co)polymer having an active alkali metal terminal, and (b) obtaining a secondarily modified polymer (a modified conjugated diene based (co)polymer) by subjecting the above-obtained primarily modified polymer to reactions comprising (b1) and (b2). (b1): a reaction with a condensation accelerator comprising a metal element. (b2): a reaction with at least one member selected from the group consisting of inorganic acids and metal halides.

Abstract: An insulating layer 3 mainly composed of a fluorine resin is provided at an outer periphery of an inner conductor 2 to provide an inner insulated wire 4. A skin layer 5 mainly composed of a fluorine resin and doped with titanium oxide and carbon black or the titanium oxide and nickel as color pigment is provided at an outer periphery of stranded inner insulated wires 4. An outer conductor (shield) 6 is provided at an outer periphery of the skin layer 5, and a sheath layer (jacket) 7 is provided at an outer periphery of the outer conductor 6, to provide a signal transmission cable 1 having excellent electric characteristics, mechanical characteristics and terminal workability.

Abstract: An extra-fine copper alloy twisted wire comprising a plurality of copper alloy wires with a wire diameter of 0.010 to 0.025 mm twisted together, each of the copper alloy wires comprising 1 to 3 weight % of silver (Ag) and a balance consisting of a copper and an inevitable impurity, the copper alloy twisted wire further comprising a tensile strength of not less than 850 MPa, and an electrical conductivity of not less than 85% IACS. The extra-fine copper alloy twisted wire comprises a solid insulation with a thickness of not more than 0.07 mm formed on an outer circumference of the extra-fine insulated wire.

Abstract: An extra-fine copper alloy wire has: a wire diameter of 0.010 to 0.025 mm; 1 to 3 weight % of silver (Ag), and a balance consisting copper (Co) and an inevitable impurity; a tensile strength of not less than 850 MPa; an electrical conductivity of not less than 85% IACS; an elongation of 0.5 to 3.0%; and a lowering rate in tensile strength of not more than 2%. The lowering rate is represented by [(1??h1/?h0)×100%] where ?h1 is a tensile strength of the wire measured after a heat treatment under conditions of a heating temperature of not more than 350° C. and a heating time of not more than 5 seconds, and ?h0 is a tensile strength of the wire measured before the heat treatment.

Abstract: An insulating layer 3 mainly composed of a fluorine resin is provided at an outer periphery of an inner conductor 2 to provide an inner insulated wire 4. A skin layer 5 mainly composed of a fluorine resin and doped with titanium oxide and carbon black or the titanium oxide and nickel as color pigment is provided at an outer periphery of stranded inner insulated wires 4. An outer conductor (shield) 6 is provided at an outer periphery of the skin layer 5, and a sheath layer (jacket) 7 is provided at an outer periphery of the outer conductor 6, to provide a signal transmission cable 1 having excellent electric characteristics, mechanical characteristics and terminal workability.

Abstract: A method for preparing a functionalized polymer, the method comprising the steps of (i) polymerizing conjugated diene monomer by employing a lanthanide-based catalyst to form a reactive polymer, and (ii) reacting the reactive polymer with a nitro compound.

Abstract: A method for preparing a functionalized polymer, the method comprising the steps of (i) polymerizing conjugated diene monomer by employing a lanthanide-based catalyst to form a reactive polymer, and (ii) reacting the reactive polymer with a nitro compound.

Abstract: An extra-fine copper alloy wire has: a wire diameter of 0.010 to 0.025 mm; 1 to 3 weight % of silver (Ag), and a balance consisting copper (Co) and an inevitable impurity; a tensile strength of not less than 850 MPa; an electrical conductivity of not less than 85% IACS; an elongation of 0.5 to 3.0%; and a lowering rate in tensile strength of not more than 2%. The lowering rate is represented by [(1??h1/?h0)×100%] where ?h1 is a tensile strength of the wire measured after a heat treatment under conditions of a heating temperature of not more than 350° C. and a heating time of not more than 5 seconds, and ?h0 is a tensile strength of the wire measured before the heat treatment.

Abstract: A method for preparing a functionalized polymer, the method comprising the steps of (i) polymerizing conjugated diene monomer by employing a lanthanide-based catalyst to form a reactive polymer, and (ii) reacting the reactive polymer with an azine compound.

Abstract: A multi speaker unit includes a permanent magnet that has a north pole and a south pole, a yoke that is opposed to the north pole and the south pole of the permanent magnet with first and second gaps, a first voice coil that is arranged in the first gap between the north pole of the permanent magnet and the yoke, a second voice coil that is arranged in the second gap between the south pole of the permanent magnet and the yoke, and first and second vibrating parts that are fixed to the first and second voice coils.

Abstract: A rubber composition for tires which comprises 100 parts by mass of (A) copolymer (a) which is a styrene-butadiene copolymer having a weight-average molecular weight of 4.0×105 to 3.0×106; as obtained in accordance with gel permeation chromatography and expressed as the value of corresponding polystyrene, a content of the bound styrene St(a) of 10 to 50% by mass and a content of the vinyl unit in the butadiene portion of 20 to 70%; 10 to 200 parts by mass of (B) copolymer (b) which is a hydrogenated styrene-butadiene copolymer having a weight-average molecular weight of 5.0×103 to 2.

Abstract: This invention provides a rubber composition comprising: a softening agent including a hydrogenated naphthenic oil of which an extract quantity of dimethylsulfoxide (DMSO) by IP 346 method is controlled to less than 3% by weight and blending at least one selected from a group of (1) a styrene-butadiene copolymer rubber with a bond styrene quantity in molecular of from 10% by weight to 60% by weight and with a vinyl bond quantity of the butadiene part of from 10% to 80% and (2) a butadiene rubber with a cis bond quantity of at least 30%. The rubber composition is superior in fracture characteristics, loss characteristic and wear resistance, and it is applicable to various rubber products, a pneumatic tire and, in particular, a tire tread.

Abstract: A rubber composition which is obtained by compounding 100 parts by weight of a rubber component and 3 to 250 parts by weight of an olefin-aromatic vinyl compound copolymer. The rubber composition exhibits an excellent gripping property, an excellent resistance to fracture and an excellent abrasion resistance simultaneously and can be applied to tires, and industrial products such as vibration isolation rubbers.

Abstract: This invention provides a rubber composition comprising: a softening agent including a hydrogenated naphthenic oil of which an extract quantity of dimethylsulfoxide (DMSO) by IP 346 method is controlled to less than 3% by weight and blending at least one selected from a group of (1) a styrene-butadiene copolymer rubber with a bond styrene quantity in molecular of from 10% by weight to 60% by weight and with a vinyl bond quantity of the butadiene part of from 10% to 80% and (2) a butadiene rubber with a cis bond quantity of at least 30%. The rubber composition is superior in fracture characteristics, loss characteristic and wear resistance, and it is applicable to various rubber products, a pneumatic tire and, in particular, a tire tread.

Abstract: A rubber composition which is obtained by compounding 100 parts by weight of a rubber component and 3 to 250 parts by weight of an olefin-aromatic vinyl compound copolymer.