公开(公告)号：US10428187B2

公开(公告)日：2019-10-01

申请号：US15559141

申请日：2016-03-18

Applicant: BRIDGESTONE CORPORATION

Inventor： Yasuto Yanagisawa ,  Yukari Kanda ,  Shigenobu Waragai ,  Osamaru Matsuo

IPC: C08J3/215 ,  C08J3/22 ,  C08J3/205 ,  C08K3/04

Abstract: Provided is a method for producing a mixture, comprising a mixing step for mixing a slurry prepared by dispersing a filler containing carbon black and a rubber liquid prepared by dispersing or the like a rubber component. In the above producing method, the carbon black contained in the slurry has a surface average acidic functional group amount (μeq/m2) of 0.40 or more and less than 3.00; a pH of the slurry is 8 or more; the sum total of the solid matter concentrations of the slurry and the rubber liquid is 20% by mass or less; a mixing equipment used has one or more rotors disposed rotatably in a rotation axis direction and one or more stators disposed unrotatably in the rotation axis direction; the rotors and the stators have plural projections which are arranged circularly with the rotation axis set as the center; rings are formed concentrically by the projections in a single stage or a multistage; and the slurry and the rubber liquid are allowed to pass through a space between the rotors and the stators while the rotors rotate, whereby the mixing is carried out to produce the mixture.

公开(公告)号：US09796819B2

公开(公告)日：2017-10-24

申请号：US15309027

申请日：2015-04-03

Applicant: BRIDGESTONE CORPORATION

Inventor： Fumiteru Nishiura ,  Yukari Kanda ,  Kazuaki Someno

IPC: C08J3/215 ,  C08J3/22 ,  C08L21/02 ,  C08K3/04

CPC classification number: C08J3/22 ,  C08J3/215 ,  C08J2307/02 ,  C08J2321/02 ,  C08K3/04 ,  C08K2201/005 ,  C08K2201/006 ,  C08L21/02 ,  C08L7/02

Abstract: Provided is a process for producing a wet masterbatch which, without deteriorating a reinforcing property of a rubber composition and rubber physical properties, micronizes a filler slurry by controlling an amount of functional groups on a filler surface, and improves filler dispersibility in the rubber wet masterbatch and the rubber composition. The process for producing a wet masterbatch comprises: a step of producing a slurry solution having a pH of 8 or more by dispersing carbon black having an average amount of surface acidic functional groups (μeq/m2) of 0.15 or more and less than 3.00; a step of producing a mixture by mixing the slurry solution and a rubber latex solution in a liquid phase; and a step of drying the mixture.