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Rubber composition and pneumatic tire using the same

A rubber composition and rubber technology, applied in special tires, tire parts, wheels, etc., can solve the problems of poor wear resistance, poor dispersion of inorganic fillers, and low elastic modulus, and achieve excellent handling stability and productivity.

Active Publication Date: 2008-01-02
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem in this tire that the handling stability in a dry state is poor because of its poor wear resistance and low modulus of elasticity
[0003] When a rubber composition compounded with an inorganic filler such as silica or the like is used in a tire tread, as a cause of deterioration in tire wear resistance, modulus of elasticity, etc., it is considered that, compared with carbon black generally used as a filler, The inorganic filler has low affinity for conjugated diene rubber as a rubber component of the tread, so the dispersibility of the inorganic filler in the conjugated diene-based rubber is poor, and a sufficient reinforcing effect cannot be obtained
[0004] On the contrary, various silane coupling agents have been developed and used to improve the affinity of inorganic fillers for conjugated diene-based rubbers, but the dispersion of inorganic fillers in conjugated diene-based rubbers is still insufficient, and there is still room for improvement

Method used

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Embodiment Construction

[0023] best practice

[0024] The present invention will be described in detail below. The rubber composition according to the present invention contains a rubber component composed of at least one of natural rubber and diene-based synthetic rubber, a filler containing at least an inorganic filler, a compound represented by formula (I), and sodium borate. Since the rubber composition according to the present invention contains an inorganic filler such as silica or the like, it is good in steering stability in a wet state, low in rolling resistance, and excellent in low fuel consumption. Moreover, the compound of formula (I) is excellent in compatibility with rubber components because it has two or more carbon-carbon double bonds bonded to a carboxyl group and an oxycarbonyl group (oxycarbonyl), and also because it has two carboxyl groups, it is The affinity of the inorganic filler is also excellent. Therefore, the dispersibility of the inorganic filler in the rubber componen...

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Abstract

A rubber composition which comprises a rubber component comprising at least one of a natural rubber and a diene-based synthetic rubber, a filler comprising an inorganic filler, a specific compound being excellent in the compatibility with the rubber component and also the affinity with the inorganic filler, and sodium borate. The above rubber composition can improve the driving stability of a tire and also is excellent in vulcanization productivity and extrusion workability.

Description

technical field [0001] The present invention relates to a rubber composition and a pneumatic tire using the rubber composition, and more particularly, to a rubber composition capable of improving the handling stability of the tire and excellent in vulcanization productivity and extrusion processability. Background technique [0002] With recent demands for reduction in fuel consumption of motor vehicles, tires with low rolling resistance are required. In this regard, there have been proposed rubber compositions using an inorganic filler such as silica or the like as a filler or using the inorganic filler with carbon black (see JP-A-2000-80205 and JP-A-2002-179841). A tire using such a rubber composition in a tread is low in rolling resistance, low in fuel consumption, and excellent in handling stability on wet roads typified by wetskid resistance. However, there is a problem in this tire that the handling stability in a dry state is poor because of its poor abrasion resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/06C08L7/00C08K3/36C08K3/38C08K5/092B60C1/00
CPCC08K5/11Y10T152/10495C08K3/38C08K5/103C08K5/092B60C1/0016C08L21/00
Inventor 金子智
Owner BRIDGESTONE CORP
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