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Rubber composition and tire

A rubber composition and rubber technology, applied in special tires, tire parts, tire treads/tread patterns, etc., can solve problems such as tire fuel efficiency degradation, and achieve the effect of improving wet road performance and improving wet road performance

Inactive Publication Date: 2019-01-04
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, when a rubber composition having a high tan δ at 0°C is simply used in the tread compound to improve the wet performance of the tire, the tan δ at 60°C which is related to the fuel efficiency of the tire also becomes higher, which is therefore Issues that cause tire fuel efficiency to deteriorate

Method used

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Embodiment

[0089] Hereinafter, the present disclosure is described in detail with reference to Examples; however, the present disclosure is not limited to the following Examples at all.

[0090]

[0091] By using a general-purpose Banbury internal mixer, kneading the components other than the vulcanization compounding agent including sulfur, a vulcanization accelerator, and zinc oxide at a maximum temperature of 160° C., adding the vulcanization compounding agent to the resulting kneaded product and They were further kneaded at a maximum temperature of 110° C. to prepare rubber compositions according to the formulations in Table 1 to Table 2 . The rubber composition thus obtained was measured by the following methods of loss tangent (tan δ), storage modulus (E'), and tensile strength (Tb), and was further evaluated for wet road performance, fuel efficiency, and abrasion resistance . The results are shown in Tables 1 to 2.

[0092] (1) Loss tangent (tanδ) and storage modulus (E')

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Abstract

The present invention provides a rubber composition which enables a tire to have improved wet performance, while maintaining fuel efficiency, and which is characterized by containing a rubber component (A) that contains a styrene-butadiene copolymer rubber (A1) having a glass transition temperature of -30 DEG C or less and a rubber (A2) having an SP value that is different from the SP value of therubber (A1) by 0.35 (cal / cm3)1 / 2 or less, a thermoplastic resin (B) and a filler (C). This rubber composition is also characterized in that: the rubber component (A) contains 50-90% by mass of the rubber (A1); the rubber component (A) contains 10-50% by mass of the rubber (A2); the rubber component (A) contains 0-10% by mass of a rubber (A3) having an SP value that is different from the SP valueof the rubber (A1) by more than 0.35 (cal / cm3)1 / 2; and the blending amount of the thermoplastic resin (B) per 100 parts by mass of the rubber component (A) is 5-40 parts by mass.

Description

technical field [0001] The present disclosure relates to a rubber composition and a tire. Background technique [0002] With regard to global carbon dioxide emission regulations, which reflect increasing concerns about environmental issues in recent years, there is an increasing demand for higher fuel efficiency of vehicles. In order to meet this demand, tire performance requires lower rolling resistance. Here, in developing a tire tread compound composition that contributes to tire rolling resistance, a loss tangent (tan δ) at about 60°C can generally be used in consideration of a tire temperature that rises to about 60°C during normal driving. as an indicator; specifically, a rubber composition having a low tan δ at about 60° C. can be used as a tread rubber, thereby suppressing tire heat generation to reduce rolling resistance, which improves tire fuel efficiency (Patent Document 1). [0003] Further, in consideration of improving vehicle driving safety, it is important...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/06B60C1/00
CPCB60C1/00C08L9/06B60C2011/0025C08L7/00C08L57/02C08K3/04C08K3/36C08K5/548C08K5/18C08K5/09C08K3/22C08K5/31C08K5/47C08L9/00C08L61/06C08L65/00B60C1/0016B60C11/0008C08L2205/025C08L2205/03
Inventor 吉泽健太郎
Owner BRIDGESTONE CORP
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