Abstract
Abstract Dry mixing involves compacting latex into solid rubber and then tearing it down to make a place for the carbon black. Likewise it involves compacting the carbon both before and after it enters the Banbury and then tearing it apart to develop its full surface. Such operations involve the application of enormous compacting and shearing forces that do neither colloid any good. By recognizing the time element the two colloids are brought together when they both are in a dispersed phase and therefore free to act as colloids; and by taking advantage of the time rate of this reaction the process effects the best spatial distribution of black in rubber so far attained. Nothing is added to interfere with the normal affinity of these two colloids. A better distributed and stronger bond results, as is evidenced by substantially enhanced road wear in tires made from such rubber.
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