| 摘要 |
PROBLEM TO BE SOLVED: To obtain carbon black and a rubber composition suitable for tire tread simultaneously satisfying improvement in wear resistance and grip and reclamation in fuel cost characteristics. SOLUTION: This carbon black belongs a hard-based region having >=80 (m<2> /g) CTAB(cetyltetraammonium bromide) and >=80 (mL/100 g) compression DBP and satisfies selective characteristic requirements of (1) nitrogen adsorption specific surface area (N2 SA); N2 SA-CTAB<=50, (2) nitrogen content (N; wt.%); 3.0×10<-3> <=N/CTAB<=1.2×10<-2> , (3) oxygen content(0; wt.%); 0/CTAB<=1.3×10<-2> , (4) the weight ratio of nitrogen content and oxygen content O/N; O/N<=3.0, (5) a basic functional group concentration (B; meq/g); 2.0×10<-4> <=B/ CTAB<=1.0×10<-2> and (6) a shell rubber amount (S); 5.0×10<-6> <=S<=5.0×10<-5> . This rubber composition is obtained by compounding 20-100 pts.wt. of the carbon black with 100 pts.wt. of rubber.
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