Rubber composition for inner-liner joint strip, and pneumatic tire

A technology of rubber composition and inner liner, which is applied in the direction of pneumatic tires, special tires, tire parts, etc., to achieve the effect of good durability

Inactive Publication Date: 2014-05-07
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, not enough research has been done to improve the important properties of inner liner weather strips such as green strength

Method used

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  • Rubber composition for inner-liner joint strip, and pneumatic tire
  • Rubber composition for inner-liner joint strip, and pneumatic tire
  • Rubber composition for inner-liner joint strip, and pneumatic tire

Examples

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Effect test

Embodiment

[0088] The present invention is described more specifically with reference to Examples; however, the present invention is not limited to these Examples.

[0089] Now, the chemical reagents used in Examples and Comparative Examples are all stated below.

[0090] NR:TSR20

[0091] Bromobutyl rubber: Bromobutyl2255 produced by Exxon Mobil

[0092] Regenerated butyl rubber: Regenerated butyl rubber produced by Car Quest Corporation (butyl rubber: 50% by mass, carbon black N660: 33% by mass, others (oil, ash, etc.): 17% by mass)

[0093] Non-halogenated butyl rubber: Butyl268 produced by Japan BUTYL Co., Ltd.

[0094] Carbon black N762: Statex N762 (N 2 SA: 29m 2 / g)

[0095] Carbon black N660: N660 (N 2 SA: 35m 2 / g)

[0096] Silica Z1085: Z1085Gr (N) produced by Rhodia 2 SA: 85m 2 / g)

[0097] Silica VN3: ULTRASIL VN3 (N 2 SA: 175m 2 / g)

[0098] Non-reactive p-alkylphenol resin: SP1068 (the non-reactive p-alkylphenol resin represented by formula (2) produced by Nip...

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Abstract

A rubber composition for an inner-liner joint strip is capable of improving green strength and adhesion, while maintaining good durability (oxidative degradation resistance, crack growth resistance) and good air retention properties, which are exhibited by a pneumatic tire formed from the composition. The rubber composition for an inner-liner joint strip, includes: a butyl rubber; silica and / or carbon black; and an alkylphenol-sulfur chloride condensate represented by formula (1) below, wherein a butyl rubber content is 60 to 100 mass % based on 100 mass % of the rubber component of the rubber composition, a total combined amount of the silica and the carbon black is 21 to 70 parts by mass per 100 parts by mass of the rubber component, and an amount of the alkylphenol-sulfur chloride condensate is 0.1 to 5 parts by mass per 100 parts by mass of the rubber component.

Description

technical field [0001] The present invention relates to a rubber composition for an inner liner weather strip and a pneumatic tire formed from the composition. Background technique [0002] In order to prevent the air filled inside the tire from penetrating to the outside of the tire, an inner liner is provided on the inner surface of the tire, thereby preventing a decrease in the inner pressure. The inner liner is formed by joining the two edges of the rubber sheet to each other on the tire building drum, it is assembled with other parts in the building machine, and then the assembled parts are vulcanized. Joint separation of the inner liner (breakage of the joint) may occur by application of forming pressure during forming or application of pressure from a bladder during vulcanization. If separation of the joint occurs, poor rubber flow is caused during vulcanization, which causes insertion of foreign objects, and during driving, greater tension is applied to the part tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/22C08L23/28C08L81/00C08L7/00C08K13/02C08K3/36C08K3/04B60C1/00
CPCC08L7/00B60C1/0008C08K13/02C08L81/00C08L23/283C08K3/36B60C1/00C08K3/04C08L23/28C08L2205/035C08K2003/2296C08K5/09C08L15/00C08K3/346C08L23/22B60C2005/147C08K5/375C08L81/02
Inventor 宫崎达也
Owner SUMITOMO RUBBER IND LTD
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