| 摘要 |
PROBLEM TO BE SOLVED: To improve workability of a rubber compsn. while keeping high anti- wear property and gripping force. SOLUTION: This compsn. comprises 100 pts.wt. diene rubber and 20-200 pts.wt. carbon black having the following characteristics: (1) Nitrogen adsorption specific surface area (N2 SA): 100-120 m<2> /g, (2) nitrogen adsorption specific surface area (N2 SA)/iodine adsorption (IA)<=0.95, (3) DBP oil absorption -24M4DBP oil absorption >=20 ml/100 g, (4)ΔDst /Dst <=0.65, and (5) Dst<-0.45×(CTAB)+137.
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