A masterbatch manufacturing method in accordance with the present disclosure comprises a first operation in which a pre-coagulation rubber latex comprising carbon black is heated as it is agitated with an agitator provided with agitator vane(s); and a second operation in which coagulant is added to the pre-coagulation rubber latex; wherein the first operation satisfies Formula I and Formula II. The Formula I is b≥i×5.6/100. The Formula II is b×tm/eh×100>10. b indicates agitator vane circumferential speed (m/s). i indicates iodine absorption (g/kg) of carbon black. tm indicates agitation time (s). eh is given by Formula III. The Formula III is eh=(te+ts)×tm/2. te indicates the temperature (° C.) of the pre-coagulation rubber latex at the end of the first operation. ts indicates the temperature (° C.) of the pre-coagulation rubber latex at the start of the first operation.
MASTERBATCH MANUFACTURING METHOD, RUBBER COMPOSITION MANUFACTURING METHOD, AND TIRE MANUFACTURING METHOD
2020-02-20
Patent
Electronic Resource
English
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