| http://www.w3.org/ns/prov#value | - The compositions tested hereafter were prepared in known manner in laboratory mixers as follows: The diene elastomer was introduced into an internal mixer filled to 75%, the temperature of which was approximately 70??? C. After a suitable kneading time, for example of the order of 1 minute, all the other ingredients, with the exception of the vlucanization system were added, including the filler (
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