METHOD FOR PRODUCING RUBBER WET MASTERBATCH, RUBBER WET MASTERBATCH, AND RUBBER COMPOSITION INCLUDING RUBBER WET MASTERBATCH

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a rubber wet masterbatch having excellent dispersibility of a filler, and improved rubber properties such as tear resistance and stress characteristics at high strain region, to provide the rubber wet masterbatch produced by the production method, and to provide a rubber composition including the rubber wet masterbatch.SOLUTION: A method for producing a rubber wet masterbatch at least includes: a solidifying step in which a filler-containing rubber coagula is produced by mixing a slurry solution including a filler and a dispersing solvent with a rubber latex solution followed by solidifying the mixture; a dehydrating step in which a rubber wet masterbatch is produced by dehydrating the filler-containing rubber coagula while heating it at 100°C to 180°C by using a first single screw extruder; and a drying and plasticizing step in which a rubber wet masterbatch having a further reduced water content is produced by plasticizing the rubber wet masterbatch while heating it at 120°C to 180°C by using a second single screw extruder.