A powdery white vulcanization promoter composition which is excellent in storage stability, the resistance of blends thereof with rubbers or the like to heat build-up, and design; and rubber compositions containing the same. Specifically, a vulcanization promoter composition which comprises a modified calcium carbonate (A) surface-treated with a fatty acid or a resin acid and a silicic acid, an inorganic filler (B) exhibiting an oil absorption of as high as 50 to 300 ml/100g, and a vulcanization promoter component (C) liquid at ordinary temperatures, characterized in that the (A):(B) mixing ratio is within the range of 30:70 to 95:5 and the content of (C) is 30 to 80 wt% based on the whole of the promoter composition.
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机译：粉末状的白色硫化促进剂组合物，其具有优异的储存稳定性，其与橡胶等的共混物的耐热聚结性和设计性;以及含有它们的橡胶组合物。具体地说，是一种硫化促进剂组合物，其包含用脂肪酸或树脂酸和硅酸表面处理过的改性碳酸钙（A），吸油率高达50-300 ml / ml的无机填料（B）。 100g，以及在常温下为液体的硫化促进剂组分（C），其特征在于，（A）:( B）的混合比在30:70至95：5的范围内，并且（C）的含量在30至70基于整个促进剂组合物为80重量％。
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