Abstract
Using temperature elevation method of Fow Tester, various calcium carbonates of different particle size and different surface coating agents were studied for the curing of SBR compounds.
From the results, the following points were clarified.
Generally, vulcanization of SBR compounds was accelerated by loading with precipitated calcium carbonates.
Among the surface coating agents employed, SBR latex, sorbic acid and octadecylpylidiniumbromide exhibit remarkable accelerative effects.
In case of using calcium carbonates coated with some organic agents, the compounds loaded with calcium carbonates of fine particle size gave more scorch resistance and more rapid rate of cure than large particle.
Moreover, it was found that the approximate value of the interrelations between the characteristic values of Flow Tester and Mooney Tester which are obtainable from their respective vulcanization curve, can be computed by exponential function.
