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Pneumatic tire

A pneumatic tire, tire circumferential technology, applied in the direction of special tires, tire parts, tire tread/tread pattern, etc., can solve the problems of reduced wear resistance, deterioration of rolling characteristics, etc., to achieve good physical properties, reduce passing Good sound and physical properties

Pending Publication Date: 2019-07-05
THE YOKOHAMA RUBBER CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, such a fit has a problem that rolling characteristics deteriorate
Therefore, it has also been proposed to prevent deterioration of rolling characteristics by increasing the compounding ratio of silica used as an inorganic filler. However, if the compounding ratio of silica is high, the wear resistance may decrease, and it is difficult to simultaneously meet these performance issues such

Method used

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Embodiment

[0044] The 19 types of tread rubber compositions (standard example 1, comparative examples 1-9, and examples 1-9) formed by the compounding shown in Tables 1 and 2 were weighed separately for compounding components other than the vulcanization accelerator and sulfur , mixed with a 1.7L closed-type Banbury mixer for 5 minutes, released the masterbatch at a temperature of 150° C., and cooled at room temperature. Then, this masterbatch was supplied to the same 1.7 L closed-type Banbury mixer, and a vulcanization accelerator and sulfur were added and mixed for 2 minutes to prepare a tread rubber composition.

[0045] In addition, in Tables 1 and 2, the compounding quantity of S-SBR1-3 describes the compounding quantity of the rubber component of the oil-extended product except oil content. In addition, in the aromatic oil column, the total amount including the aromatic oil compounded in the tread rubber composition and the extender oil in S-SBR is described.

[0046] Furthermore,...

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Abstract

An object of the present invention is to provide a pneumatic tire that is balanced at a higher level while satisfying the grasping performance, the low rolling performance and wear resistance on dry and wet road surfaces. The solution is to use a pneumatic tire including a main groove 21 in a tread portion 1, wherein the area ratio of the main groove 21 is 20% to 30%, and the groove depth of the main groove 21 is 6 mm to 9 mm; and a rubber composition for forming the tread of the tread portion 1 is blended with 50 parts by mass to 150 parts by mass of silica and 100 parts by mass to 60 DEG C to 150 DEG C. of the aromatic modified terpene resin 5, with respect to 100 parts by mass of the modified diene rubber. In the amount of 5% by mass to 15% by mass of the silane coupling agent, the amount of the silica is 5% by mass to 15% by mass, and the alkyl group having 7 to 20 carbon atoms is blended with respect to the amount of silica. The alkyltriethoxysilane is 0.1% by mass to 20% by mass.

Description

technical field [0001] The present invention relates to a pneumatic tire having main grooves extending in the tire circumferential direction on the surface of a tread portion. Background technique [0002] In recent years, with regard to rubber compositions constituting pneumatic tires, various countermeasures have been proposed for simultaneously satisfying performances such as grip performance on dry road surfaces and wet road surfaces, low rolling performance, and wear resistance at a high level (for example, see Patent Document 1). In general, among these properties, grip performance is known, for example, by blending a large amount of styrene-butadiene rubber with a high glass transition temperature and a small particle size rubber composition with a tread rubber composition constituting the tread portion of a pneumatic tire. Inorganic fillers can improve. However, such a fit has a problem that rolling characteristics deteriorate. Therefore, it has also been proposed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/12B60C1/00
CPCB60C11/1259B60C1/0016B60C2011/129Y02T10/86
Inventor 饭冢雄介
Owner THE YOKOHAMA RUBBER CO LTD
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