Rubber composition for tire cord coating, breaker edge strip, breaker cushion or cord-adjoining strip, and pneumatic tire

a technology of rubber composition and tire cord, which is applied in the direction of tire parts, vehicle components, conductive materials, etc., can solve the problems of reducing elongation at break, difficult to increase e*, and unlikely to achieve satisfactory property balance, etc., to achieve balanced improvement in handling stability, ride quality, and fuel economy.

Active Publication Date: 2014-08-14
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a new type of rubber material used in tires. It consists of two parts - one part contains polyisobutylenes (PIBs) with different properties than regular PIBs while another part has specific chemical structures like benzene rings and amines. These materials help improve the performance of tires by improving their ability to handle more stress without losing its effectiveness over time.

Problems solved by technology

The technical problem addressed by this patent is finding an improved method for making rubber materials that can improve their performance without compromising on their strength and durability.

Method used

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  • Rubber composition for tire cord coating, breaker edge strip, breaker cushion or cord-adjoining strip, and pneumatic tire
  • Rubber composition for tire cord coating, breaker edge strip, breaker cushion or cord-adjoining strip, and pneumatic tire
  • Rubber composition for tire cord coating, breaker edge strip, breaker cushion or cord-adjoining strip, and pneumatic tire

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examples

[0127]Hereinafter, the present invention will be described in more detail with reference to examples which, however, are not intended to limit the scope of the present invention.

[0128]The various chemical agents used in examples and comparative examples are listed below.

[0129]NR: TSR20

[0130]IR: IR2200 from JSR Corp.

[0131]Modified BR: BR1250H (tin-modified BR polymerized using a lithium initiator; vinyl content: 10 to 13% by mass; Mw / Mn: 1.5; tin atom content: 250 ppm) from Zeon Corporation

[0132]Modified SBR(HPR340): HPR340 (modified S-SBR, bound styrene content: 10% by mass, Tg: −64° C.; coupled by and terminated with an alkoxysilane, and then modified by a compound represented by formula (2) (R3 to R5=methoxy group, R6 and R7=hydrogen atom, n=3)) from JSR Corp.

[0133]Silica (VN3): ULTRASIL VN3 (N2SA: 175 m2 / g) from Evonik Degussa

[0134]Carbon black (N351H): SHOBLACK N351H(N2SA: 73 m2 / g) from Cabot Japan K.K.

[0135]Carbon black (N326): DIABLACK N326 (N2SA: 84 m2 / g, DBP oil absorpt

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Abstract

Provided are a rubber composition for a tire cord topping, a breaker edge strip, a breaker cushion, or a strip adjacent to cords, which achieves a balanced improvement in handling stability, fuel economy, durability, ride quality, and adhesion; and pneumatic tires including the same. The rubber composition includes: an isoprene-based rubber; a phenol resin and/or an alkylphenol resin; and a partial condensate of HMMM and/or a partial condensate of HMMPME, wherein an amount of the isoprene-based rubber is 60% by mass or higher per 100% by mass of the rubber component; and a combined amount of the phenol resin and the alkylphenol resin is 2-3.9 parts by mass, a combined amount of the partial condensate of HMMM and the partial condensate of HMMPME is 0.5-5 parts by mass, and an amount of silica is at most 15 parts by mass, each per 100 parts by mass of the rubber component.

Description

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Claims

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Application Information

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Owner SUMITOMO RUBBER IND LTD
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