| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a master batch capable of improving low fuel consumption, rubber strength, abrasion resistance and adhesion to a steel cord with good balance while retaining driving stability, a tire rubber composition using the master batch, and a pneumatic tire using the tire rubber composition. <P>SOLUTION: The master batch includes a coumarone indene resin, sulfur and a diene rubber, wherein a content of the coumarone indene resin is 8-55 mass%. The coumarone indene resin preferably has a softening point of -20 to 45°C. Contents of the diene rubber and the sulfur in 100 mass% of the master batch are preferably 10-80 mass% and 5-80 mass%, respectively. <P>COPYRIGHT: (C)2012,JPO&INPIT |
