| abstract |
PROBLEM TO BE SOLVED: To provide a rubber composition particularly suitable for pneumatic tires, which has no reduction in initial elastic modulus or shortening of Mooney scorch time, is excellent in heat-curing suppressing property, can suppress curing due to heat history, and is excellent. provide. SOLUTION: The rubber composition comprises 100 parts by weight of a rubber component composed of at least one diene rubber, 0.5 to 5.0 parts by weight of a vulcanization accelerator, and 1.0 to 3.5 parts by weight of sulfur, A rubber composition comprising 0.65 to 1.80 parts by weight of a zinc element as a total weight, and a composite zinc white as a zinc source of the zinc element. The composite zinc white is An embodiment having a zinc oxide layer on the surface and / or an embodiment containing an inorganic metal salt inside is preferred. |