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Rubber composition

A rubber composition, polymer technology, applied in transportation and packaging, rolling resistance optimization, special tires, etc., can solve problems such as cost increase, not

Active Publication Date: 2018-12-21
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On the other hand, using only SBR is usually not preferred in terms of low temperature brittleness
In addition, the use of SBR, especially S-SBR in large quantities, naturally leads to increased costs

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0093] Next, the present invention will be explained in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples and Comparative Examples.

[0094] [production of tire]

[0095] The rubber compositions prepared in Examples and Comparative Examples were mixed and kneaded according to the mixing recipe shown in Table 1, and used for tread rubber to produce a test tire, which was an air-filled 195 / 65R15 for a passenger car Radial tires.

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Abstract

Provided is a rubber composition which is suitable for use in a tread, which has improved wet and dry grip properties and simultaneously achieves improved low-temperature brittleness, and which is characterized by having blended therein an emulsion-polymerized styrene butadiene rubber and a solution-polymerized styrene butadiene rubber having specific glass transition points and specific molecularweight distributions, together with a polymer having a low glass transition point in an amount falling within a specific range.

Description

technical field [0001] The present invention relates to a rubber composition suitable for use in treads, which has improved wet grip and dry grip, and allows improvement of low-temperature brittleness to be compatible with wet grip and dry grip while reducing rolling resistance. Background technique [0002] For the performance of the tire, safety and running stability on roads of various conditions such as dry roads, wet roads, and ice and snow roads are required. Especially in the portion of the tread that comes into contact with the road surface, it is necessary to improve sustainable wet grip performance and dry grip performance. In addition, the entire portion of the tire (including the tread portion) is exposed to low temperatures in the cold season regardless of whether the car is running on icy or snowy roads, so it is also necessary to improve the low-temperature brittleness of the tire. [0003] Styrene Butadiene Rubber: SBR is used in many cases to enhance wet g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/06B60C1/00C08L7/00C08L9/00C08L45/00C08L57/02C08L61/10
CPCB60C1/00C08L45/00C08L57/02C08L9/06C08K3/04C08K3/36Y02T10/86B60C1/0016C08L2205/025C08L2205/03
Inventor 前川和大
Owner BRIDGESTONE CORP