The Yokohama Rubber Co., Ltd.

Masahiro Ikawa

Keisuke Chino

Tetsuji Kawazura

Osamu Ozawa

Yoshihiro Soeda

Noriaki Kuroda

Daisuke Kanenari

Makoto Ashiura

Yuichi Hara

Kazuto Yamakawa

Gou Kawaguchi

Hidekazu Takeyama

Giro Watanabe

Kazunori Ishikawa

Fumito Yatsuyanagi

Junichiro Natori

Hiroyuki Kaido

Jiro Watanabe

Naoya Amino

Tsukasa Maruyama

Hiroyuki Okuhira

Hidekazu Onoi

Masayoshi Ito

Katsuhiro Tanaka

A thermoplastic resin elastomer/rubber laminate comprising a rubber layer containing 100 parts by weight of a rubber and 0.1-20 parts by weight of an antioxidant preblended thereto and a thermoplastic resin elastomer composition layer, obtained by laminating at least two layers of the rubber layer and the thermoplastic resin elastomer composition layer followed by heating and pressing, whereby the antioxidant migrates from the rubber layer to the thermoplastic resin elastomer composition layer to improve the weathering resistance as well as a pneumatic tire using the same as an inner liner.

Layered thermoplastic-resin-elastomer/rubber product with improved weatherability and pneumatic tire made with the same

An organically modified layered clay ionically bonded with an organic compound having an ammonium group and an amino group, an organic polymer composition containing the same and an organic polymer capable of reacting with the amino group, and an inner liner using the same.

Organically modified layered clay as well as organic polymer composition and tire inner liner containing same

A thermoplastic polymer having a carbonyl-containing group and a nitrogen-containing 5-membered heterocycle-containing group in side chains, and a composition thereof. The thermoplastic polymer and composition thereof have excellent recycle property in that physical properties do not deteriorate even though formation of crosslinking and dissociation of crosslinking are repeatedly conducted with altering temperature. The thermoplastic polymer and composition thereof are that its crosslinked structure is considerably stable at room temperature, and therefore have considerably high tensile strength. In particular, in the case of bonding to a main chain at 3-position or 4-position of a nitrogen-containing 5-membered heterocycle, intermolecular hydrogen bond is caused, so that a cured product has high mechanical properties.

Thermoplastic polymer and thermoplastic elastomer composition

A thermo-reversible, crosslinkable elastomer, a composition containing the same, a rubber-bonded body and a rubber structure containing the rubber-bonded body are disclosed. The thermo-reversible, crosslinkable elastomer has an elastomer main-chain and a crosslinkable portion having at least one group selected from the group consisting of acid anhydride group and hydroxyl group. The thermo-reversible, crosslinkable elastomer can form stable crosslinked structure at room temperature, thereby having rubber plasticity, show sufficient melt flowability at molding temperature of general thermoplastic resin, and repeatedly reproduce crosslinking formation and crosslinking dissociation.

Methods of making and recycling rubber bodies bonded with a thermo-reversible, crosslinkable elastomer

A thermoplastic elastomer composition of a structure of a thermoplastic resin (A) in which a rubber composition (B) is dispersed, where the stress at the time of 2.5% elongation of the stress-strain curve of the thermoplastic elastomer composition is 0.1 to 50 MPa and the ratio of the stress (M ) at &minus;20&deg; C. and 200% elongation and the stress (M ) at &minus;20&deg; C. and 100% elongation is 1.0<M /M <2.0, particularly a thermoplastic elastomer composition structured with the polyamide resin of the thermoplastic resin (A) in which the rubber composition (B) is dispersed, includes a polyamide plasticizer (C1) and/or a thermoplastic elastomer (C2), the ratio of composition being (A) 15 to 59% by weight, (B) 40 to 70% by weight (C1&plus;C2), and 1 to 30% by weight and a tire using the same.

Thermoplastic elastomer composition having improved processability and tire using the same

Adhesive of thiirane and oxirane-containing compound and oxirane-containing compound

An elastomer composition including an elastomer having a functional group, and a compound having a functional group, in which corresponding functional groups form a cross-link by at least one of an ionic bond, a hydrogen bond, and Diels-Alder reaction with temperatures, i.e., by heating, while the cross-link is cleaved at around room temperature, forming and cleaving of the cross-link being reversible.

Elastomer composition

A modified polybutene(polyisobutylene) containing isobutylene repeating units and having, in the main chain, at the ends, and/or at the side chains of the polymer chain thereof, free radicals stable at a room temperature and in the presence of oxygen, or having a half-ester structure, amide structure, onium salt structure, or imide structure or acid anhydride residual group, as well as a rubber composition containing the same.

Polymer containing isobutylene as repeating unit and rubber composition containing the same

A polymer composition for a tire having an air permeation coefficient of 25&times;10 cc&middot;cm/cm &middot;sec &middot;cmHg (at 30&deg; C.) or less and a Young's modulus of 1 to 500 MPa, including (A) at least 10% by weight, based on the weight of the total polymer component, of at least one thermoplastic resin having an air permeation coefficient of not more than 25&times;10 cc&middot;cm/cm &middot;sec&middot;cmHg (at 30&deg; C.) and a Young's modulus of more than 500 MPa and (B) at least 10% by weight, based on the total weight of the polymer component, of at least one elastomer component having an air permeation coefficient of more than 25&times;10 cc&middot;cm/cm &middot;sec&middot;cmHg (at 30&deg; C.) and a Young's modulus of not more than 500 MPa, wherein the total amount (A)&plus;(B) of the component (A) and the component (B) is not less than 30% by weight based on the weight of the total polymer component, and a pneumatic tire obtained therefrom.

Polymer composition for tire and pneumatic tire using same

Rubber composition

A polymer composition for a tire having an air permeation coefficient of 25.times.10.sup.-12 cc.multidot.cm/cm.sup.2 .multidot.sec.multidot.cmHg (at 30.degree. C.) or less and a Young's modulus of 1 to 500 MPa, including (A) at least 10% by weight, based on the weight of the total polymer component, of at least one thermoplastic resin having an air permeation coefficient of not more than 25.times.10.sup.-12 cc.multidot.cm/cm.sup.2 .multidot.sec.multidot.cmHg (at 30.degree. C.) and a Young's modulus of more than 500 MPa and (B) at least 10% by weight, based on the total weight of the polymer component, of at least one elastomer component having an air permeation coefficient of more than 25.times.10.sup.-12 cc.multidot.cm/cm.sup.2 .multidot.sec.multidot.cmHg (at 30.degree. C.) and a Young's modulus of not more than 500 MPa, wherein the total amount (A)+(B) of the component (A) and the component (B) is not less than 30% by weight based on the weight of the total polymer component, and a pneumatic tire obtained therefrom.

A pneumatic tire having an air permeation prevention layer composed of a thin film of a resin composition including at least 20% by weight of a thermoplastic polyester elastomer comprised of a block copolymer of polybutylene terephthalate and polyoxyalkylene diimide diacid at a weight ratio of polybutylene terephthalate/polyoxyalkylene diimide diacid of 85/15 or less.

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Hiratsuka, Japan

Masahiro Ikawa