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Pneumatic tyre

A technology of pneumatic tires and inner linings, applied in pneumatic tires, special tires, tire parts and other directions, and can solve problems such as simultaneous expansion and contraction, rupture, etc.

Inactive Publication Date: 2007-01-24
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these rubber compositions have problems such as extremely difficult expansion and contraction with other rubber substances during tire molding or vulcanization, and cracking during running

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 8 and comparative Embodiment 1 to 7

[0034] Materials in the rubber used for identification in Examples and Comparative Examples are described below. The rubber compositions used for identification are shown in Tables 1 to 3.

[0035] Natural rubber: RSS#3, purchased from Tech Bee Hang Co., Ltd.

[0036] Epoxidized natural rubber (ENR): ENR-50, purchased from Guthrie Bhd. (epoxidation rate: 50% (mol))

[0037] ENR-25, purchased from Guthrie Bhd. (epoxidation rate: 25% (mole))

[0038] Bromobutyl rubber (Br-IIR): Exxon bromobutyl 2255 (2.0% bromine content, (weight)), available from Exxon Chemical Company

[0039] Chlorobutyl Rubber (Cl-IIR): Exxon Chlorobutyl 1066

[0040] Carbon black (GPF): Seast V (N2SA: 46m2 / g), purchased from Tokai Carbon Co., Ltd.

[0041] Phylosilicate (sodium bentonite): Kunipia F (average particle size 0.1 to 2um, average aspect ratio 320, most interlayer exchangeable cations are sodium), purchased from Kunimine Industries

[0042] Oil-1: Motor Oil 22, purchased from Showa Shell Sek...

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Abstract

The present invention provides a rubber composition having favorable adhesion, in which air permeability is significantly decreased, and a lightweight pneumatic tire comprising the rubber composition. Specifically, the present invention provides a pneumatic tire having an inner liner comprising a rubber composition containing 20 to 100 parts by weight of an inorganic filler, based on 100 parts of a rubber component containing 65 to 94 % by weight of at least one rubber selected from the group consisting of butyl rubber, halogenated butyl rubber and rubber obtained by halogenating a copolymer of isomonoolefin having 4 to 7 carbon atoms and p-alkylstyrene; and 6 to 35 % by weight of epoxidized natural rubber having an epoxidization ratio of 5 to 85 % by mol.

Description

technical field [0001] The present invention relates to a pneumatic tire in which a rubber composition is used as an inner liner, and the air permeability of the rubber composition is obtained by mixing butyl rubber, halogenated butyl rubber in a specific ratio or containing 4 to 7 carbon atoms by halogenation The rubber obtained from copolymers of isomerized monoolefins and p-alkylstyrene and epoxidized natural rubber were significantly reduced. Background technique [0002] Pneumatic tires can support loads and exhibit various characteristics such as ride comfort and combustion efficiency by inflating air into the tires. Therefore, it is extremely important to maintain the air pressure in the tire. In order to prevent air leakage and maintain the air pressure in the tire, an inner liner containing low air permeability rubber such as butyl rubber and halogenated butyl rubber is formed on the inner surface of the pneumatic tire. [0003] However, when the content of butyl ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/00C08L7/00B60C1/00B60C5/00B60C5/14C08K3/00C08L15/00C08L19/00C08L23/22C08L23/28C08L25/16
CPCB60C1/0008C08L19/006C08C19/06C08L7/00C08K3/0033C08L15/00C08L23/22C08K3/013C08L2666/08
Inventor 八木则子村冈清繁皆川康久西冈和幸
Owner SUMITOMO RUBBER IND LTD
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