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Elastomer compositions and methods

  • US 6,291,572 B1
  • Filed: 05/02/1997
  • Issued: 09/18/2001
  • Est. Priority Date: 05/03/1996
  • Status: Expired due to Fees
First Claim
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1. A multi-stage process for producing substantially unvulcanized, processable elastomer composition, comprising:

  • in a non-productive early stage of the multi-stage process, substantially dispersing modified carbon black particulate filler and sulfuir crosslinking agent into sulfur crosslinkable hydrocarbon elastomer to produce a processable, substantially unvulcanized elastomer masterbatch, the sulfuir crosslinking agent comprising sulfur or sulfur donor effective to crosslink the hydrocarbon elastomer.

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