Bridgestone Corporation

Kuraray Co., Ltd.

Sumitomo Bakelite Company Limited

Hideki Kitano

Yaohong Chen

Masao Hikasa

Tetsuo Amamoto

Takatsugu Tanaka

Xiaorong Wang

Shojiro Kaita

Olivier Tardif

Hidefumi Kotsubo

Nahoto Hayashi

Yusuke Tanaka

Yuwa Takahashi

Takato Inamiya

Yuan-Yong Yan

James Herman Pawlow

Shinji Tai

Yasuo Horikawa

Christopher G Robertson

Mindaugas Rackaitis

Takuya Ogasawara

Hideyuki Chiashi

Kenji Murayama

Yasuhiro Morimura

Masami Aoki

Hiroshi Kawai

Takahiro Matsuse

Kouta Isoyama

Kiyomi Sasaki

Satoshi Yamakoshi

Haruyuki Hatano

Provided is an inner liner for a pneumatic tire including no less than 8 resin-layers, the resin-layer having a layer A constituted with a resin composition containing a resin having gas barrier properties, and a layer B that is adjacent to the layer A and is constituted with a resin composition containing an elastomer, an extensional viscosity &#x3b7;of the resin composition of the layer A, and an extensional viscosity &#x3b7;of the resin composition of the layer B as determined at a predetermined temperature both being no less than 1,000 Pa&#xb7;s, and an extensional viscosity ratio &#x3b7;/&#x3b7;being no less than 0.2 and no greater than 10.

Inner liner for pneumatic tire, method for producing the same, and pneumatic tire

A multilayered structure having a layer A constituted with a resin composition containing a gas barrier resin, and a layer B being adjacent to the layer A and being constituted with a resin composition containing an elastomer. The total number of the layer A and the layer B is at least 7. The average thickness of the layer A in terms of a single layer is no less than 0.001 &#x3bc;m and no greater than 10 &#x3bc;m, and the average thickness of the layer B in terms of a single layer is no less than 0.001 &#x3bc;m and no greater than 40 &#x3bc;m. The multilayered structure is formed by irradiating with an active energy ray. Furthermore, an inner liner having the multilayered structure, and a pneumatic tire provided with the inner liner are provided.

Multilayered structure, inner liner having the same, and pneumatic tire

Disclosed is an inner liner for a pneumatic tire, the inner liner including no less than 8 resin-layers, the resin-layer having a layer A constituted with a resin composition containing a gas barrier resin, and a layer B constituted with a resin composition containing an elastomer, at least one of the resin compositions included in the layer A and the layer B that are adjacent with each other containing a metal salt, the content of the metal salt being no less than 1 ppm and no greater than 10,000 ppm in terms of metal element equivalent, and an interlayer adhesive force between the layer A and the layer B being no less than 500 g/15 mm. The layer A and the layer B are preferably alternately laminated.

Inner liner for pneumatic tire and method for producing the same

To provide a multilayer structure having high gas barrier property and crack resistance as well as excellent fatigue resistance, an inner liner for a pneumatic tire using such a multilayer structure, and a pneumatic tire comprising the inner liner. According to the present invention, in a multilayer structureincluding a barrier layerand an elastomer layer, a proportion of a thickness of the elastomer layerin the multilayer structure ((U+U+ . . . +Un)/T) is 60% or more.

Multilayer structure, inner liner for pneumatic tire, and pneumatic tire

The laminate according to the present invention includes a thermoplastic resin film-containing layer and a rubber layer, in which the rubber layer contains a modified diene polymer, and the rubber layer has a dynamic storage modulus E' at &#x2212;20&#xb0; C. of 1.0&#xd7;10to 1.0&#xd7;10Pa. This laminate can improve the resistance to the fractures and the cracks of the inner liner.

Laminate, tire, and method for producing tire

To provide a multilayer structure that may adhere to rubber material without the necessity of providing an adhesive layer, an inner liner and a pneumatic tire using the multilayer structure. According to the present invention, a multilayer structureis formed by alternately laminating elastomer layerscontaining thermoplastic elastomer and barrier layerscontaining a gas barrier resin, wherein an outermost layerlaminated uppermost among layers constituting the multilayer structurecontains an elastomer component that may heat-adhere to diene rubber.

A pneumatic tire includes: an inner liner having a thermoplastic resin film, a carcass, and an adhesive layer disposed between the inner liner and the carcass, in which the dynamic storage modulus E's at &#x2212;20&#xb0; C. of the thermoplastic resin film, the adhesive layer, and the carcass are defined as E', E&#x2032;, and E&#x2032;, respectively, and the relationship among E&#x2032;, E&#x2032;, and E&#x2032; satisfies E&#x2032;&#x3e;E&#x2032;&#x3e;E&#x2032;. This pneumatic tire has excellent anti-crack property in a low-temperature environment of the inner liner.

Pneumatic tire

A method is provided for synthesizing a core-shell nanoparticle that includes the following steps: providing a polymeric seed (in a solvent) that includes mono-vinyl monomer cross-liniked with a cross-linking agent to form the core of the nanoparticle, the core has an average diameter of from about nanometers to about 10,000 nanometers, and the core has polymer chains with living ends; adding a stabilizer to stabilize the seed and prevent the seed from precipitating out of solution; and grafting a shell species onto the living ends of the core to form the shell of the nanoparticle. A core-first synthesized nanoparticle, along with a rubber composition and tire product are also provided.

Core-first nanoparticle formation process, nanoparticle, and composition

Compositions and methods are included for preparing a hairy polymeric nanoparticle including first and second shell block polymer arms are at least partially phase-separated and surround a polymeric core. One type of polymeric arm can have a greater polarity than the other type(s) of polymeric arms. A rubber composition including the hairy nanoparticles is also provided.

Hairy polymeric nanoparticles with first and second shell block polymer arms

Disclosed is a method of manufacturing a copolymer of a conjugated diene compound and an olefin other than the conjugated diene compound, where a conjugated diene compound and an olefin other than the conjugated diene compound is copolymerized in the presence of a polymerization catalyst composition containing components: (A) a rare earth element compound or a reactant of the rare earth element compound and a Lewis base; and (B) at least one selected from a group consisting of an ionic compound (B-1) composed of a non-coordinating anion and a cation, an aluminoxane (B-2), and at least one kind of halogen compound (B-3) selected from among a Lewis acid, a complex compound of a metal halide and a Lewis base, and an organic compound containing active halogen (when containing at least one of (B-1) and (B-3), the polymerization catalyst composition further contains component (C): an organometallic compound).

Copolymer and method of manufacturing the same

A method is provided for making nanoparticles, including the steps of: combining a hydrocarbon solvent and an aprotic, polar co-solvent, a mono-vinyl aromatic monomer, polymerization initiator, a solution stabilizer, and a first charge of a cross-linking agent. Subsequently, a second charge of cross-linking agent is added. The nanoparticles have an average diameter of 5 nanometers to about 10,000 nanometers. Spherical nanoparticles are also provided that include a cross-linking agent comprising 30% to 60% by weight of the combined weight of a mono-vinyl aromatic species and the cross-linking agent. The spherical nanoparticles also meet the following equation:0.90&#x2266;(1/2)&#x2266;1.1

Well defined, highly crosslinked nanoparticles and method for making same

In a copolymer of a conjugated diene compound and a non-conjugated olefin, the conjugated diene unit has a cis-1,4 bond content of greater than 70.5% and the non-conjugated olefin is contained in an amount of 10 mol % or more.

Copolymer of conjugated diene compound and non-conjugated olefin, rubber composition, cross-linked rubber composition and tire

The present invention provides a copolymer of a conjugated diene compound and a non-conjugated olefin, in which the conjugated diene unit has cis-1,4 bonds and the non-conjugated olefin contains many ethylene structures. In a copolymer of a conjugated diene compound and an unconjugated olefin other than the conjugated diene compound, the conjugated diene unit has a cis-1,4 bond content of 50% or more and the unconjugated olefin is contained in an amount of 20 mol % or more.

Copolymer of conjugated diene compound and non-conjugated olefin, rubber composition and tire

A photo-curable transfer sheet having a photo-curable transfer layer comprising a photo-curable composition, the photo-curable composition being deformable by application of pressure and containing a reactive polymer having a photopolymerizable functional group,

Photo-curable transfer sheet, process for the preparation of optical information recording medium using the sheet, and optical information recording medium

Growing community of inventors

Tokyo, Japan

Hideki Kitano