Rubber composition, and pneumatic tire

Abstract

The present invention provides a rubber composition whereby it is possible to improve processability, low fuel consumption, rubber strength, resistance to corrosion, wet grip performance, and steering stability in a balanced manner. The present invention also provides a pneumatic tire using said rubber composition. The present invention pertains to a rubber composition containing 35 mass% of a styrene butadiene rubber per 100 mass% of a rubber component and comprising: a conjugated diene-based polymer obtained by reacting a compound containing nitrogen atoms and / or silicon atoms with the active terminal of a co-polymer obtained by polymerizing a monomer component containing a conjugated diene compound and a silicon-containing vinyl compound using a polymerization initiator represented by formula (I); and a silica having a nitrogen adsorption specific surface area between 40 and 400 m2 / g. The content of the conjugated diene-based polymer is 1 to 90 mass% and the content of a polyisoprene-based rubber is 0 to 40 mass% in 100 mass% of the rubber component, and the content of the silica is 10 to 150 parts by mass relative to 100 parts by mass of the rubber component.

Description

technical field [0001] The present invention relates to a rubber composition and a pneumatic tire manufactured using the same. Background technique [0002] In recent years, due to increased attention to environmental issues, the demand for lower fuel consumption in automobiles has been increasing, and rubber compositions used in tires for automobiles are also required to have excellent fuel efficiency. As a rubber composition for automobile tires, a rubber composition containing a conjugated diene polymer such as polybutadiene or a butadiene-styrene copolymer, and a filler such as carbon black or silica is generally used. Wait. [0003] As a method of improving fuel economy, for example, Patent Document 1 proposes a method of using a diene rubber (modified rubber) modified with an amino group- and alkoxy group-containing organosilicon compound. However, when using modified rubber, on the one hand, the reaction efficiency between silica and rubber (polymer) is improved, an...

AI Technical Summary

Problems solved by technology

However, when using modified rubber, on the one hand, the reaction efficiency between silica and rubber (polymer) is improved, and fuel consumption is improved, but on the other hand, the Mooney viscosity tends to increase and processability tends to deteriorate, so it is difficult to Balance of low fuel consumption and workability

In addition, when using modified rubber, the combination of silica and rubber is too tight, and the strength and abrasion resistance of the rubber may also decrease

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