| 摘要 |
A rubber composition comprising a natural rubber wet master batch, which is obtained by mixing a natural rubber latex with a slurry obtained by dispersing carbon black in water in advance, wherein carbon black having (1) a CTAB specific surface area (m 2 /g) in the range of 60<CTAB<110, (2) a 24M4 DBP (cm 3 /100 g) in the range of 55<24M4 DBP<75 and (3) the CTAB specific surface area and a specific tinting strength (TINT) satisfying a relation of TINT>0.41×CTAB+81, is used in an amount of (4) 10 to 100 parts by mass per 100 parts by mass of the natural rubber component. Resistance to fracture and resistance to cut growth of the steel coating rubber for tires and industrial rubber products are improved by using the rubber composition.
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