Bridgestone Corporation

Riken Corporation

Hitachi Cable, Inc.

Jsr Corporation

Hitachi Cable Fine-tech, Ltd.

Hitachi Global, Ltd.

Ryuji Nakagawa

Yoichi Ozawa

Junko Matsushita

Steven Luo

Ken Tanaka

Hiroshi Okikawa

Eiju Suzuki

Terrence Eugene Hogan

Shojiro Kaita

Hiromitsu Kuroda

Olivier Tardif

Ryohei Okada

Hakaru Matsui

Osamu Seya

Hideyuki Chiashi

Takuya Ogasawara

Kotaro Hayakawa

Shinichi Masui

Huang Detian

Yuan-Yong Yan

Masahiro Shibata

Detian Huang

Toshihiro Tadaki

Takuo Sone

Jason T Poulton

Takaomi Matsumoto

Yuki Itoh

Hiroshi Komuro

Noriko Mori

Hideaki Yokoyama

Shigeaki Matsuo

Kouji Masaki

Fumihiro Shiraishi

Horihisa Kano

Kazuyuki Naito

Fuminori Oota

The invention provides a method for producing a modified conjugated diene (co)polymer, the method including comprising: a modification reaction step including causing an organic silane compound to react with a conjugated diene (co)polymer having an active site at the active site, the organic silane compound having a characteristic group for forming a silanol group through hydrolysis and, in the vicinity of the characteristic group, (i) a functional group which binds the organic silane compound to the conjugated diene (co)polymer via addition to or substitution at the active site and which promotes reaction between the silanol group and a reinforcing filler after the addition or substitution reaction, or (ii) a functional group which promotes reaction between the silanol group and a reinforcing filler, and a hydrolyzation step performed after the modification reaction step; a modified conjugated diene (co)polymer having, at a molecular end of the conjugated diene (co)polymer, a silanol group, and a functional group in the vicinity of the silanol group, the functional group accelerating reaction between the silanol group and the reinforcing filler; a rubber composition containing the (co)polymer and carbon black having specific characteristics; and a tire formed from the rubber composition.

Method for producing modified conjugated diene polymer/copolymer, modified conjugated diene polymer/copolymer, and rubber composition and tire using the same

Provided are a pressure-sensitive adhesive composition comprising, as a rubber component, at least two modified rubbers modified with a polar functional group and having different modification rates with each other, a laminate body comprising (A) a resin film layer and (B) a rubber elastic body layer wherein they are adhered via (C) the said pressure-sensitive adhesive composition, and a pneumatic tire having the said laminate body as an inner liner layer; and thus, provided are the pressure-sensitive adhesive composition that can firmly bond between the resin film layer and the rubber elastic body layer while the laminate body obtained therefrom does not generate cracks at low temperature, the laminate body using the said pressure-sensitive adhesive composition, and the pneumatic tire.

Adhesive composition, adhesion method, and pneumatic tire

Provided is a pneumatic tire which is improved in a rolling resistance and a ride comfort in normal running without damaging a run flat durability. It is a pneumatic tire provided with a bead core, a carcass layer, a tread rubber layer, an inner liner, a side reinforcing layer and a bead filler, characterized by using a rubber composition (a) which contains (A) a rubber component and (B) a filler and which has a dynamic storage modulus (E') of 10 MPa or less at a dynamic strain of 1% and 25&#xb0; C. and a &#x3a3; value of 5.0 or less in a loss tangent tan &#x3b4; at 28 to 150&#xb0; C. in the physical properties of the vulcanized rubber.

Pneumatic tire

The present invention provides an adhesive composition that may improve both adhesiveness to a film layer and adhesiveness to a rubber layer, and an adhesion method using the same, as well as a laminate and a tire. The adhesive composition according to the present invention includes a rubber component, at least 80 mass % of which rubber component is an epoxidized natural rubber.

Adhesive composition, adhesion method using the same, laminate and tire

A method for preparing a functionalized polymer, the method comprising the steps of preparing a reactive polymer, and reacting the reactive polymer with a halosilane compound containing an amino group.

Polymers functionalized with halosilanes containing an amino group

This invention relates to an aromatic vinyl compound-conjugated diene compound copolymer capable of giving excellent wear resistance and resistance to wet skid to a tire, and more particularly to an aromatic vinyl compound-conjugated diene compound copolymer obtained by an addition polymerization of an aromatic vinyl compound and a conjugated diene compound in the presence of a polymerization catalyst composition comprising at least one specified metallocene complex selected from the group consisting of a metallocene complex represented by the following general formula (I): (wherein M is a lanthanoid element, scandium or yttrium, and Cpis independently a non-substituted or substituted indenyl, and Rto Rare independently an alkyl group having a carbon number of 1-3 or a hydrogen atom, and L is a neutral Lewis base, and w is an integer of 0-3) and so on, wherein a content of cis-1,4 bond in a conjugated diene compound portion is not less than 80%.

Aromatic vinyl compound-conjugated diene compound copolymer and method of producing the same as well as rubber composition and tire

The method for producing a modified conjugated diene based (co)polymer, according to the present invention comprises

Method for producing modified conjugated diene based (co)polymer, modified conjugated diene based (co)polymer, and rubber composition

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.

Rubber composition and tire using the same

An extra-fine copper alloy twisted wire including 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 including 1 to 3 weight % of silver (Ag) and a balance consisting of a copper and an inevitable impurity, the copper alloy twisted wire further including 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 includes a solid insulation with a thickness of not more than 0.07 mm formed on an outer circumference of the extra-fine insulated wire.

Extra-fine copper alloy wire, extra-fine copper alloy twisted wire, extra-fine insulated wire, coaxial cable, multicore cable and manufacturing method thereof

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): (wherein a is a mountain peak value around 1130 cmin a transmittance spectrum through Fourier transform infrared spectroscopy (FT-IR), and b is a valley peak value around 967 cm, and c is a valley peak value around 911 cm, and d is a valley peak value around 736 cm) satisfy relationships of equation (II): (Calculated value of cis-1,4 bond)=e/(e+f+g)&#xd7;100&#x2267;99 and equation (III): (Calculated value of vinyl bond)=g/(e+f+g)&#xd7;100&#x2266;0.

Polybutadiene as well as rubber composition using the same and tire

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.

Functionalized polymers

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.

Polymers functionalized with nitro compounds

An insulating layermainly composed of a fluorine resin is provided at an outer periphery of an inner conductorto provide an inner insulated wire. A skin layermainly 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. An outer conductor (shield)is provided at an outer periphery of the skin layer, and a sheath layer (jacket)is provided at an outer periphery of the outer conductor, to provide a signal transmission cablehaving excellent electric characteristics, mechanical characteristics and terminal workability.

Signal transmission cable and multi-wire cable

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&#x2212;&#x3c3;/&#x3c3;)&#xd7;100%] where &#x3c3;is a tensile strength of the wire measured after a heat treatment under conditions of a heating temperature of not more than 350&#xb0; C. and a heating time of not more than 5 seconds, and &#x3c3;is a tensile strength of the wire measured before the heat treatment.

Growing community of inventors

Tokyo, Japan

Ryuji Nakagawa