Preparation process for a rubbery rubber masterbatch, wet rubber masterbatch, and wet rubber masterbatch containing rubber composition

摘要

A process for producing a wet rubber masterbatch includes a coagulation step in which a slurry solution containing the filler and the dispersing solvent are mixed with the rubber latex solution and the mixture is coagulated so as to produce a filler-containing rubber coagulation, and a heating step wherein a uniaxial extruder is used to heat the filler-containing rubber coagulation to a temperature of 180 to 200 ° C, thereby dewatering, drying and plasticizing the filler-containing rubber coagulation in a single step. The uniaxial extruder is an extruder having a screw and an outer cylinder having an inner wall surface in which a slit is formed to extend along the longitudinal direction of the outer cylinder (screw axial direction) and at least a portion of the inner wall surface of the outer cylinder Outer cylinder is subjected to a blast treatment.