Title:
METHOD FOR PRODUCING RUBBER WET MASTER BATCH AND METHOD FOR PRODUCING RUBBER COMPOSITION FOR TIRES
Document Type and Number:
WIPO Patent Application WO/2019/130800
Kind Code:
A1
Abstract:
A method for producing a rubber wet master batch which is obtained using at least a carbon black, a dispersion solvent and a rubber latex solution as starting materials. This method for producing a rubber wet master batch comprises: a step (I) for producing a carbon black-containing rubber latex solution by mixing the carbon black, the dispersion solvent and the rubber latex solution; and a step (II) for producing a carbon black-containing rubber coagulum by coagulating the thus-obtained carbon black-containing rubber latex solution. In the step (I), the mechanical stability of the rubber latex solution as determined in accordance with ASTM D1076-59 is 300 seconds or more; and in the step (II), the pH of the carbon black-containing latex solution before coagulation is from 6.0 to 8.5. The present invention is able to provide a method for producing a rubber wet master batch which has good dispersibility (homogeneity) of carbon black.
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Inventors:
TANAKA MAKOTO (JP)
NOMURA KENJI (JP)
NOMURA KENJI (JP)
Application Number:
PCT/JP2018/040477
Publication Date:
July 04, 2019
Filing Date:
October 31, 2018
Export Citation:
Assignee:
TOYO TIRE CORP (JP)
International Classes:
C08J3/22; B60C1/00; C08K3/04; C08L7/00; C08L9/00
Foreign References:
| JP2015048416A | 2015-03-16 | |||
| JP2017039881A | 2017-02-23 | |||
| JP2012184354A | 2012-09-27 |
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (JP)
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