| 摘要 |
PURPOSE: A rubber composition for bladder comprises an exchanging number of a bladder at manufacturing tire, and to improve the productivity of tire manufacturing. CONSTITUTION: A rubber composition for bladder comprises a rubber component, and a masterbatch obtained by mixing zinc oxide, an ethylene propylene diene copolymer, and butyl based rubber. In the masterbatch, the content of the sum of the ethylenepropylene diene copolymer and the butyl based rubber is 10-180 parts by weight on the basis of the zinc oxide. The masterbatch is obtained by additionally mixing an ethylene vinyl acetate copolymer. The content of the zinc oxide originated from the masterbatch is 0.5-10 parts by weight, on the basis of 100.0 parts by weight of the rubber component.
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