| 摘要 |
PROBLEM TO BE SOLVED: To obtain a rubber chemical masterbatch that does not use a specific material, has general purpose properties in use, an excellent processability and no defective adhesivity and dispersibility and a rubber composition using the same and to provide a pneumatic tire using the rubber composition. SOLUTION: The rubber chemical masterbatch comprises (A) 10-80 mass% of a rubber chemical, (B) 5-50 mass% of a rubber component, (C) 1-40 mass% of carbon black and (D) 0-20 mass% of a process oil and/or a fatty acid in which the component (A) comprises (A') 15 to <30 mass% of a rubber chemical having a melting point of≤110°C [(A)+(B)+(C)+(D)=100 mass%]. COPYRIGHT: (C)2008,JPO&INPIT
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