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Thermoplastic elsatomer composition, and pneumatic tire using same

A technology of thermoplastic elastomer and composition, applied in the direction of no separate air cushion, special tire, tire parts, etc., can solve the problems of poor fatigue durability and achieve excellent fatigue durability and air barrier properties

Inactive Publication Date: 2012-05-30
YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] On the other hand, when a thermoplastic elastomer composition obtained by dispersing a brominated isobutylene-p-methylstyrene copolymer in an ethylene vinyl alcohol copolymer is used as an inner liner of a pneumatic tire, although it has excellent air barrier properties, there are Problem of poor fatigue durability

Method used

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  • Thermoplastic elsatomer composition, and pneumatic tire using same
  • Thermoplastic elsatomer composition, and pneumatic tire using same
  • Thermoplastic elsatomer composition, and pneumatic tire using same

Examples

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Effect test

Embodiment

[0050] (1) Preparation of thermoplastic elastomer composition

[0051] As raw materials for the thermoplastic elastomer composition, the following were used.

[0052] Br-IPMS: brominated isobutylene-p-methylstyrene copolymer "Exxpro" (registered trademark) MDX89-4 manufactured by ExxonMobil Chemical Company

[0053] Zinc oxide: 3 types of zinc oxide manufactured by Shodo Chemical Industry Co., Ltd.

[0054] Stearic acid: microbead stearic acid manufactured by NOF Corporation

[0055] Zinc stearate: Zinc stearate manufactured by Sakai Chemical Industry Co., Ltd.

[0056] Nylon 6 / 66: Ube Industries, Ltd. "UBE Nylon" 5013B

[0057] EVOH (Et48%): Nippon Synthetic Chemical Industry Co., Ltd. ethylene vinyl alcohol copolymer "SOARNOL" (registered trademark) H4815B (ethylene composition ratio 48 mol%, saponification degree 99% or more)

[0058] EVOH (Et42%): Nippon Gosei Chemical Industry Co., Ltd. ethylene vinyl alcohol copolymer "SOARNOL" (registered trademark) A4412B (ethylene...

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Abstract

Provided is a thermoplastic elastomer composition suitable for use as an inner liner of a pneumatic tire, and exhibiting excellent air barrier properties and fatigue endurance. The thermoplastic elastomer composition has a rubber composition dispersed in a thermoplastic resin composition, said rubber composition containing a halogenated isoolefin para-alkylstyrene copolymer and being crosslinked, and said thermoplastic resin composition containing a polyamide and an ethylene vinyl alcohol copolymer / polyvinyl alcohol. The amount of the ethylene vinyl alcohol copolymer / polyvinyl alcohol is preferably 1-25 mass% of the total amount of the thermoplastic resin composition. The amount of the halogenated isoolefin para-alkylstyrene copolymer is preferably 80-200 parts by mass to 100 parts by mass of the total of the thermoplasic resin composition.

Description

technical field [0001] The present invention relates to a thermoplastic elastomer composition in which a rubber composition is dispersed in a thermoplastic resin composition. In particular, it relates to a thermoplastic elastomer composition usable for an innerliner of a pneumatic tire. Background technique [0002] Films using thermoplastic elastomer compositions in which elastomers such as bromides of isobutylene-p-methylstyrene copolymers are blended with thermoplastic resins such as polyamide resins, polyvinyl alcohol, and vinyl alcohol / ethylene copolymers are known. Pneumatic tire with an air permeation-proof layer (Japanese Patent Laid-Open No. 2008-273424). [0003] In addition, there is known an inner liner for a tire using a film comprising at least a layer composed of a resin composition in which isobutylene bromide-para Viscoelastic bodies such as methylstyrene (Japanese Patent Laid-Open No. 2009-263653 ). [0004] In addition, there is known a pneumatic tire u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/18B60C5/14C08J3/24C08L29/04C08L77/00
CPCC08L77/00B60C1/0008C08L23/283Y10T152/10495C08L29/04C08L29/06C08L23/0861
Inventor 友井修作川口航一
Owner YOKOHAMA RUBBER CO LTD
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