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Manufacturing method of rubber composition and pneumatic tire

A technology of rubber composition and manufacturing method, applied in special tires, tire parts, transportation and packaging, etc., can solve the problems of reduced hardness of rubber composition, reduced car handling performance and wet grip performance, etc., and improved dispersibility. Effect

Inactive Publication Date: 2009-04-01
SUMITOMO RUBBER IND LTD
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  • Description
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Problems solved by technology

At this time, there is a tendency that the hardness of the rubber composition decreases, the entire tire softens, and the handling performance and wet grip performance of the car decrease.

Method used

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  • Manufacturing method of rubber composition and pneumatic tire

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Embodiment 1～2 and comparative example 1～3

[0043] According to the content of the proportion shown in Table 1, the rubber composition was kneaded in the following two steps. The content of the compounding ratio represents parts by mass (PHR) relative to 100 parts by mass of the rubber component.

[0044]

[0045] According to the ratio table shown in Table 1, mix silica, organic vulcanizing agent, silane coupling agent, zinc oxide, stearic acid, anti-aging agent, wax and aromatic oil in the rubber components of SBR and BR, and use Benbo In an internal mixer, knead at 150°C for 3 minutes.

[0046]

[0047] Sulfur and a vulcanization accelerator were added to the kneaded product obtained in the first kneading step, and kneaded at 80° C. for 3 minutes using a roller to obtain an unvulcanized rubber composition. The unvulcanized rubber composition was molded into a tread shape, bonded to other tire components, and vulcanized in a flat plate at 160° C. for 20 minutes to prepare a test tire (tire size: 195 / 65R15).

[0...

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Abstract

The invention provides a rubber composition that is superior in low heat build-up property and wear resistance. It is a manufacturing method of a rubber composition containing 30 to 150 parts by mass of silica and 0.5 to 10 parts by mass of an organic vulcanization agent represented by the following general formula (1) to 100 parts by mass of a rubber component, including a first kneading step of kneading the organic vulcanization agent and silica into the rubber component, and a second kneading step of kneading a vulcanization agent and a vulcanization accelerator thereafter: R1-(R-Sx)n-R2 (1) (wherein R is (CH2-CH2-O)m-CH2-CH, and R1 and R2 are independently hydrogen, a methyl group, a thiol group, a hydroxy group, a carboxyl group, or an aldehyde group, X is an integer of 3 to 6, n is an integer of 10 to 400, and m is an integer of 1 to 5).

Description

technical field [0001] The present invention relates to a method for producing a rubber composition excellent in low heat generation and wear resistance, and a pneumatic tire using the rubber composition as a tread. Background technique [0002] In recent years, the demand for lower fuel consumption of passenger cars has increased, and developments to reduce the rolling resistance of pneumatic tires have also been advanced. In order to reduce the rolling resistance of tires, it is important to study tire constituent members, especially rubber compositions for treads that account for a high proportion of tires. In order to reduce the rolling resistance, the rubber composition for treads must have low heat build-up, and as a method for this, there is a method of reducing the compounding amount of the reinforcing filler. At this time, there is a tendency that the hardness of the rubber composition decreases, the entire tire softens, and the handling performance and wet grip pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L21/00C08K3/36C08K5/372B29B7/28B29B7/72B60C1/00
CPCC08K3/36C08L81/04C08K5/372C08L21/00C08J2321/00C08J3/203B60C1/0016C08L9/06C08L9/00C08L2666/14
Inventor 保地和郎
Owner SUMITOMO RUBBER IND LTD
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