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Silica Masterbatch Made with Emulsion and Solution Rubber

  • US 20190322841A1
  • Filed: 07/02/2019
  • Published: 10/24/2019
  • Est. Priority Date: 03/07/2014
  • Status: Active Grant
First Claim
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1. A process for making silica-filled solution rubber, comprising the steps of:

  • hydrophobating silica with a coupling agent that bonds to the silica and provides a site for bonding to rubber;

    mixing the hydrophobated silica into a process oil;

    making a solution rubber stream comprising solution rubber in an organic solvent;

    feeding the solution rubber stream to a steam distillation unit;

    feeding the mixture of hydrophobated silica and process oil to the steam distillation unit;

    operating the steam distillation unit; and

    recovering a silica-filled solution-made rubber that comprises the solution rubber and the hydrophobated silica.

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