| 摘要 |
PROBLEM TO BE SOLVED: To provide a rubber composition which is used for large rubber products and can prevent the deterioration of physical properties due to over-vulcanization, especially the deterioration of modulus, cross-link density and shear stiffness, to provide a large rubber product using the composition, and to provide a method for producing the large rubber product. SOLUTION: This rubber composition for large rubber products comprises 100 pts. mass of a dienic rubber containing natural rubber in an amount of≥50 mass % and 0.1 to 5 pts. mass of a vulcanization accelerator represented by the general formula (1) (R<SP>1</SP>and R<SP>2</SP>are each independently a 1 to 6C non-cyclic aliphatic group which may be branched or a 3 to 6C alicyclic group which may be branched). COPYRIGHT: (C)2005,JPO&NCIPI |
