- STYRENE-BUTADIENE RUBBER COMPOUND WITH HIGH CONTENTS OF SILICA AND THE PROCESS THEREOF

摘要

The present invention is a method for producing a rubber composition using styrene-butadiene rubber (BR) and butadiene rubber (BR), wet master by putting a nested silica formed a nest structure on the surface of the organic solution in the mixed solution of SBR and BR Obtain a composite of SBR / BR-nest silica by a wet masterbatch method, and add 0.5 to 10 phr of 2-ethylhexanoic acid zinc salt (ZEH) with a known additive to the composite of SBR / BR-nest silica obtained above. It provides a method for producing a rubber composition, characterized in that the addition. Since the rubber composition according to the present invention adds ZEH together with a known additive, it is possible to prepare SBR / BR blended rubber having a very high modulus and tensile strength while adding silica content of 90 phr or more in the blended rubber. The rubber composition expressing the physical properties suitable for the use of the compounding rubber can be manufactured by controlling the amount of additives such as the constituent components, the amount of silica in the compounding rubber, and the vulcanization accelerator.