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Rubber composition for tire, manufacturing method thereof and pneumatic tire using the rubber composition for tire

A rubber composition and tire technology, applied in special tires, tire parts, educts, etc., can solve the problem of reducing the unreacted rate of silane coupling agent, not realizing the heat supply, not realizing that the fuel consumption performance of the tire is fully improved and other problems, to achieve the effect of improving rolling resistance and improving grip performance

Inactive Publication Date: 2012-09-05
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in this method, additional investment in equipment is required, and it is not appreciated that sufficient heat supply can be used to sufficiently reduce the unreacted rate of the silane coupling agent
It is also not recognized that the fuel consumption performance of tires manufactured using the rubber composition is sufficiently improved

Method used

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  • Rubber composition for tire, manufacturing method thereof and pneumatic tire using the rubber composition for tire
  • Rubber composition for tire, manufacturing method thereof and pneumatic tire using the rubber composition for tire
  • Rubber composition for tire, manufacturing method thereof and pneumatic tire using the rubber composition for tire

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Embodiment

[0124] Next, the present invention will be described in further detail based on examples.

[0125] 1. Rubber material

[0126] In the following examples, the rubber materials shown in Tables 1-4 were used. The rubber materials shown in Tables 1-4 will be described below.

[0127] In Table 3, Examples 1 to 3 are examples in which end-modified SBR and temperature-controlled kneading conditions were used in combination. Examples 4-6 are examples in which modified BR and temperature-maintained kneading conditions were used in combination. Examples 7 to 9 are examples in which end-modified SBR and modified BR were used in combination with temperature-maintained kneading conditions.

[0128] (1) Raw rubber

[0129] SBR: SBR1502 (unmodified, styrene content: 23.5% by mass), manufactured by JSR Corporation.

[0130] End-modified SBR (1): E10 (solution-polymerized, end group: amino group, modification rate: 51% by mass, styrene content: 39% by mass, ethylene bonded amount: 31% by ...

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Abstract

The invention provides a method for manufacturing a rubber composition for a tire, and the method comprises: a kneading step, wherein a closed kneading machine is used to knead a rubber material and a silane coupling agent together, the rubber material is obtained by mixture of 100 mass parts of raw material rubber for the tire and 5-150 mass parts of silicon dioxide; and a holding step, wherein at the lower part of the closed kneading machine, under high temperature, a rubber block obtained by kneading is kept for a predetermined time, therefore, heat required for reaction of silicon dioxide and the silane coupling agent is provided for the rubber block, wherein in the 100 mass parts of raw material rubber for the tire, 5-100 mass parts of styrene butadiene rubber with the molecular weight distribution Mw / Mn being below 2.3 and end modification, and / or 10-60 mass parts of tin modified polybutadiene rubber by lithium initiator polymerization, the in modified polybutadiene rubber is provided with 50-3000 ppm of tin atom content ratio, 5-50 mass% of ethylene combination amount, and less-than 2.0 of molecular weight distribution Mw / Mn.

Description

technical field [0001] The present invention relates to a rubber composition for tires (hereinafter, sometimes simply referred to as "rubber composition"), a method for producing the same, and a pneumatic tire using the rubber composition for tires, in which silica and The silane coupling agent reacts sufficiently, and the rubber composition can improve fuel consumption performance when used in a pneumatic tire. Background technique [0002] In recent years, there has been a strong demand for pneumatic tires satisfying both reduction in fuel consumption and improvement in wet grip performance. In order to meet this requirement, silica is mixed as a reinforcing agent into rubber compositions for extrusion moldings such as treads and the like. [0003] However, sufficient reinforcement cannot be obtained using only silica. Therefore, conventionally, in the kneading step, a silane coupling agent having an alkoxy group is mixed together with silica, and the silica is reacted w...

Claims

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Application Information

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IPC IPC(8): C08L15/00C08L9/06C08L9/00C08K3/36B60C1/00
CPCY02P20/143Y02T10/86
Inventor 川濑正人平山道夫
Owner SUMITOMO RUBBER IND LTD
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