| 摘要 |
PURPOSE: A releasing agent composition for use in the inside of a green tire is provided which releases the green tire from a breather bag and does not contaminate a mould. CONSTITUTION: A releasing agent comprises (a)from 60 to 70% by weight of mica powder,(b)from 4 to 16% by weight of lamp black, (c)from 0.4 to 3.2% by weight of polyoxystyrene sodiumsulfonate as a surfactant, (d)from 0.5 to 1.1% weight of carboxy methyl cellulose, and (e)conventional compounds such as polyethylene olefin ether, silicon oil, polyethyleneglycol and lecithin. The releasing agent is mixed with water in a ratio of 1: 1 for use, the mixture has a viscosity of below 5,000 CPS, a hydrogen ion exponent of 7-8 and a coefficient of friction of below 0.3. The contamination of a side wall of a tire is prevented during vulcanization by using the composition.
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