Rubber wet master batch producing method, rubber wet master batch, and rubber composition containing rubber wet master batch

Patent metadata

Field	Value
Publication number	US-9527968-B2
Application number	US-201314421225-A
Country	US
Kind code	B2
Filing date	Jun 18, 2013
Priority date	Nov 8, 2012
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

A method for producing a rubber wet master batch contains a coagulating step of mixing a slurry solution containing the filler and the dispersing solvent with the rubber latex solution, and coagulating the mixture, thereby producing a filler-containing rubber coagulation, and a heating step of using a uniaxial extruder to heat the filler-containing rubber coagulation to a temperature of 180 to 200 C, thereby dehydrating, drying and plasticizing the filler-containing rubber coagulation through 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 be extended along the longitudinal direction of the outer cylinder (screw axial direction); and at least one portion of the inner wall surface of the outer cylinder is subjected to blasting treatment.

First claim

The invention claimed is:

1. A method for producing a rubber wet master batch obtained by using at least a filler, a dispersing solvent, and a rubber latex solution as raw materials, comprising:
a coagulating step of mixing a slurry solution containing the filler and the dispersing solvent with the rubber latex solution, and coagulating the mixture, thereby producing a filler-containing rubber coagulation; and
a heating step of using a uniaxial extruder to heat the filler-containing rubber coagulation to a temperature of 180 to 200° C., thereby dehydrating, drying and plasticizing the filler-containing rubber coagulation through a single step,
wherein: 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 be extended along the longitudinal direction of the outer cylinder (screw axial direction); and at least one portion of the inner wall surface of the outer cylinder is subjected to blasting treatment.

2. The method for producing a rubber wet master batch according to claim 1 , wherein the blasted surface of the inner wall surface of the outer cylinder has a surface roughness (Ra) of 10 to 100 μm.

Assignees

• Toyo Tire & Rubber Co

Inventors

• Nomura Kenji
• Miyasaka Takashi

Classifications

• B29C48/681

  for single screws · CPC title

• B29K2105/0064

  Latex, emulsion or dispersion · CPC title

• B29K2021/00

  Use of unspecified rubbers as moulding material · CPC title

• C08J3/22

  using masterbatch techniques · CPC title

• B29C48/686

  having grooves or cavities · CPC title