Rubber composition for tire treads

A technology of rubber composition and tire tread, which is applied in special tires, tire parts, transportation and packaging, etc., can solve the problems of burnt extrusion processability and viscosity increase, and achieve improved viscosity and excellent low rolling resistance , The effect of improving extrusion processability

Active Publication Date: 2015-06-24
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rubber composition containing a mercapto group-containing silane coupling agent has problems such as high viscosity and poor extrusion processability such as easy occurrence of scorching (early vulcanization). Patent Document 1 also attempts to improve the viscosity and handleability. , but may not achieve sufficient improvement

Method used

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  • Rubber composition for tire treads
  • Rubber composition for tire treads
  • Rubber composition for tire treads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0101] Using the compounding ingredients shown in Table 4 as common compounds, 23 kinds of rubber compositions for tire treads (Examples 1-14, Comparative Examples 1-9) composed of compounds shown in Tables 1-3 were prepared in the following manner: Knead the ingredients other than sulfur, vulcanization accelerator and vulcanization retarder in a 1.8L closed mixer at 160°C for 5 minutes, then add sulfur, vulcanization accelerator and vulcanization retarder to the discharged masterbatch, Knead with an open mixer.

[0102] In addition, in Tables 1 to 3, since SBR and modified SBR contain 37.5 parts by weight, 25 parts by weight, and 20 parts by weight of oil-extending oil, the column of the compounding amount is included in parentheses together with the actual compounding amount. The compounding quantity of each SBR net weight except the extended oil is described. In addition, the amounts of the compounding ingredients described in Table 4 are expressed in parts by weight relat...

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Abstract

Problem: To provide a rubber composition for use in tire treads that enhances low rolling resistance and wet performance to conventional levels or above while maintaining and enhancing extrudability. Solution: A rubber composition for use in tire treads comprising from 60 to 130 parts by weight of silica per 100 parts by weight of diene rubber containing not less than 50% by weight of hydroxyl group-containing modified styrene butadiene rubber, in which the weight ratio of oil to filler containing the silica is not greater than 0.25, and a silane coupling agent having a mercapto group and an Si-O bond is compounded in an amount from 4 to 15% by weight of the silica content, and diethylene glycol is compounded in an amount from 1 to 6% by weight of the silica content.

Description

technical field [0001] The present invention relates to a rubber composition for tire treads, and more specifically, to a rubber composition for tire treads that maintains improved extrusion processability, and improves low rolling resistance and wet performance to more than conventional levels things. Background technique [0002] As performance requirements for pneumatic tires, excellent fuel economy performance, high wet performance, and excellent safety are required along with increasing concern for global environmental issues. Therefore, by adding silica to the rubber composition constituting the tread portion, the dynamic viscoelastic properties such as the loss tangent (tan δ) of the tread rubber are improved, heat generation is suppressed, rolling resistance is reduced, fuel consumption performance is improved, and wet performance is improved. . However, silica tends to aggregate particles through hydrogen bonding of silanol groups, which are functional groups on i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L15/00B60C1/00C08K3/36C08K5/43C08K5/548C08L7/00
CPCC08L15/00B60C1/0016C08K3/36C08K5/43C08K5/548C08L7/00Y02T10/86C08F236/10
Inventor 佐藤正树三原谕赤堀弥生筑岛新那贺步
Owner THE YOKOHAMA RUBBER CO LTD
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