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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 wear resistance, durability reduction, difficulty in balancing, and deterioration of rolling characteristics, etc. Achieves the effect of maintaining durability, good physical properties, and a good balance of physical properties

Active Publication Date: 2022-06-24
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in such a fit, there is concern about deterioration of rolling characteristics
Therefore, it has also been proposed to improve rolling properties by blending silica instead of carbon black, but when the blending ratio of silica is high, wear resistance and durability may decrease, and there is a problem that it is difficult to balance these properties. question

Method used

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Examples

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Embodiment

[0040] About 23 kinds of rubber compositions for treads (Standard Example 1, Comparative Examples 1 to 7, Examples 1 to 15) composed of the compounds shown in Tables 1 to 3, the compounding components except the vulcanization accelerator and sulfur were weighed, respectively. The mixture was kneaded for 5 minutes with a 1.7 L closed Banbury mixer, and the master batch was discharged at a temperature of 150° C. and cooled at room temperature. Then, this master batch was supplied to the same 1.7 L closed Banbury mixer, a vulcanization accelerator and sulfur were added, and the mixture was mixed for 2 minutes to prepare a rubber composition for treads.

[0041] In addition, in Tables 1-3, the compounding quantity of SBR1-3 describes the compounding quantity of the substantial rubber component after removing the oil content of an oil-extended product. In addition, the column of aromatic oil includes the total amount of the aromatic oil blended in the rubber composition for treads ...

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Abstract

To provide a pneumatic tire capable of improving wear resistance, low rolling performance, and steering stability on wet roads while maintaining durability. In a pneumatic tire having main grooves (21) in the tread portion (1), the groove depth of the main grooves (21) is 7 mm to 11 mm, and as the rubber composition for a tread constituting the tread portion (1), the following tires are used: Surface rubber composition: including natural rubber, styrene butadiene rubber, and butadiene rubber as rubber components, the average glass transition temperature Tg of the rubber component is -50°C or less, and two Silica is 50 to 100 parts by mass, the compounding amount of silica is 80 mass % or more of the total amount of carbon black and silica, and aromatic oil is compounded at 40 mass % or less with respect to the amount of silica.

Description

technical field [0001] The present invention relates to a pneumatic tire provided with a main groove extending in the tire circumferential direction on the surface of the tread portion. Background technique [0002] In recent years, with regard to the rubber composition constituting the pneumatic tire, it has been proposed to realize the improvement of the wear resistance, the low fuel consumption (low rolling performance), the steering stability performance on the wet road (wet road performance), and the tire weight. Various countermeasures are taken to take into account these performances in a high-dimensional manner (for example, refer to Patent Document 1). Generally, it is known that abrasion resistance among these properties can be improved by, for example, adding a large amount of carbon black to a rubber composition for a tread constituting a tread portion of a pneumatic tire. However, in such a fit, there is a fear of deterioration of the rolling characteristics. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C1/00C08K3/04C08K3/36C08L7/00C08L9/00C08L91/00
CPCC08L7/00C08L9/00C08K2201/006B60C11/0304B60C11/04B60C2011/0381B60C2011/0383B60C11/0306B60C1/0016B60C2011/0355B60C2011/0348C08L91/00Y02T10/86B60C11/03B60C2011/0341C08F136/06C08K3/04C08K3/36C08L9/06B60C11/033B60C2011/0025
Inventor 冈美幸
Owner THE YOKOHAMA RUBBER CO LTD
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