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Rubber composition for tread

A technology of rubber composition and tire tread, which is applied in the direction of tire tread/tread pattern, special tires, tire parts, etc., and can solve the problems of handling stability and wear resistance decline

Inactive Publication Date: 2005-09-07
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a large amount of silica is added, there will be problems of reduced handling stability and wear resistance on dry roads

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3 and comparative Embodiment 1～12

[0030] According to the composition shown in Table 1, the components other than the sulfur and the vulcanization accelerator were kneaded in a 1.7-liter Banbury mixer (manufactured by Kobe Steel Co., Ltd.). Sulfur and vulcanization accelerators are then added and kneaded with a twin-screw roller press. The resulting mixture was vulcanized at 175° C. for 10 minutes to finally obtain a rubber composition for treads. The amounts of SBR, OH-modified SBR, carbon black 1, carbon black 2 and PEG are shown in Table 3.

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PUM

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Abstract

The present invention provides a rubber composition for a tread, in which wet grip properties, rolling resistance, steering stability, abrasion resistance and processability are highly improved in a balanced manner. Specifically, the present invention provides a rubber composition for a tread comprising (B) 30 to 120 parts by weight of carbon black and (C) 2 to 20 parts by weight of polyethylene glycol, based on (A) 100 parts by weight of a diene rubber containing 10 to 100 % by weight of styrene-butadiene rubber having a hydroxyl group in the molecular chain; wherein the carbon black (B) has nitrogen-adsorbing specific surface area of 175 to 300 m<2> / g, cetyl trimethyl ammonium bromide oil absorption of 155 to 250 ml / 100 g and iodine adsorption of 150 to 330 mg / g, and the ratio of cetyl trimethyl ammonium bromide oil absorption to iodine adsorption is 0.85 to 1.20.

Description

technical field [0001] The present invention relates to a rubber composition for tire treads, especially a rubber composition for tire treads which is excellent in handling stability, wet skid resistance, rolling resistance, abrasion resistance and processability. Background technique [0002] In order to improve wet skid resistance (grip and braking distance when driving on wet roads) and reduce rolling resistance of tires (improvement of rolling resistance), it is known to add a large amount of silica. However, when a large amount of silica is added, since the dispersibility of silica tends to decrease during kneading, the viscosity of the rubber increases, or the processability deteriorates. [0003] In order to improve processability, it is known to add polyethylene glycol as a dispersant (see JP-A-2002-88193). However, when a large amount of silica is added, there arises the problem of deterioration of handling stability and wear resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C1/00C08K3/04C08K3/36C08L9/06C08L19/00C08L25/10C08L71/02
CPCC08K3/04C08L25/10B60C1/0016C08L9/06C08L71/02C08L19/006Y02T10/86C08L2666/14
Inventor 国泽铁也
Owner SUMITOMO RUBBER IND LTD
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