| 摘要 |
The present invention relates to a rubber composition containing carbon black for blending with rubber which is obtained in a reaction equipment comprising a combustion gas-generating zone, a reaction zone and a reaction-stopping zone by producing a high temperature combustion gas in the combustion gas-generating zone, subsequently spraying and introducing a raw material into the reaction zone to form a reaction gas stream containing carbon black and then quenching the above reaction gas stream by a multistage quenching medium-introducing means to terminate the reaction, wherein (1) the above carbon black for blending with rubber satisfies the following relational equations (1) and (2): 10<X<40   (1) 90<Z<100   (2) (wherein X represents a toluene extract light transmittance (%) of the carbon black after introducing a first quenching medium from a raw material-introducing position, and Z represents a toluene extract light transmittance (%) of the carbon black after introducing a final quenching medium) and (2) (B) the above carbon black for blending with rubber is contained in a proportion of 10 to 250 parts by mass based on 100 parts by mass of (A) a rubber component containing a conjugated diene based rubber. The present invention provides a carbon black-containing rubber component providing a pneumatic tire in which a rolling resistance and an abrasion resistance are balanced at a high level.
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