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Rubber composition for tire tread and pneumatic tire

A technology of rubber composition and tire tread, which is applied in the direction of special tires, tire parts, rolling resistance optimization, etc. It can solve the problems of high cohesion, low affinity, and inability to reduce rolling resistance wet road performance, and achieve low Excellent rolling resistance and wear resistance, excellent processability

Active Publication Date: 2017-06-16
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, there is a problem that, since the affinity between silica and the rubber component is low, and the cohesion between silica is high, even if only silica is blended in the rubber component, the silica is not dispersed and cannot be used. Sufficiently obtain the effect of reducing rolling resistance or the effect of improving wet performance

Method used

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  • Rubber composition for tire tread and pneumatic tire
  • Rubber composition for tire tread and pneumatic tire
  • Rubber composition for tire tread and pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0210]

[0211] The components shown in Table 3 below were blended in proportions (parts by mass) shown in Table 3 below. In addition, in the following Table 3, mass % with respect to silica is also described in the parentheses content of the lower column of content about alkylsilane C1, comparative alkylsilane 1, and a silane coupling agent.

[0212] Specifically, first, the components other than the sulfur and the vulcanization accelerator among the components shown in the following Table 3 were heated to about 150° C. using a 1.7-liter internal Banbury mixer, mixed for 5 minutes, and then discharged. , cooled to room temperature to obtain a masterbatch. Further, sulfur and a vulcanization accelerator were mixed with the obtained masterbatch using the above-mentioned Banbury mixer to obtain a rubber composition for tire treads.

[0213]

[0214] (Indicator of processability)

[0215] The prepared rubber composition for tire treads (unvulcanized) was measured in accorda...

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Abstract

A rubber composition for a tire tread of the present technology comprises a rubber component containing not less than 30 mass % of a conjugated diene-based rubber (A), a silica (B), and a predetermined alkyltriethoxysilane (C), the conjugated diene-based rubber (A) containing not less than 5 mass % of a specified structural member (a), the silica (B) having a nitrogen adsorption specific surface area (N2SA) from 194 to 225 m2 / g and a CTAB adsorption specific surface area (CTAB) from 180 to 210 m2 / g, a content of the silica (B) being from 60 to 150 parts by mass per 100 parts by mass of the rubber component, and a content of the alkyltriethoxysilane (C) being from 2.5 to 8.0 mass % relative to the silica (B).

Description

technical field [0001] The invention relates to a rubber composition for tire tread and a pneumatic tire. Background technique [0002] In recent years, reduction in rolling resistance of tires has been demanded from the standpoint of low fuel consumption during vehicle running. In addition, from the viewpoint of safety, improvement of wet performance is required. On the other hand, there is known a method of blending silica into a rubber component constituting a tread portion of a tire to achieve both low rolling resistance and wet performance. [0003] However, there is a problem that, since the affinity between silica and the rubber component is low, and the cohesion between silica is high, even if only silica is blended in the rubber component, the silica is not dispersed and cannot be used. The effect of reducing rolling resistance or the effect of improving wet performance can be sufficiently obtained. [0004] Among them, Patent Document 1 discloses a rubber compos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/00B60C1/00C08G81/02C08K3/36C08K5/5419C08L87/00
CPCB60C1/0016C08K3/36C08K5/5419Y02T10/86C08L9/00B60C1/00C08G81/02C08L87/00
Inventor 佐藤正树芦浦诚
Owner THE YOKOHAMA RUBBER CO LTD