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Method for the addition of vulcanized waste rubber to virgin rubber products

United States Patent

*** EXPIRED ***
5,597,851
January 28, 1997
View the Complete Patent at the US Patent & Trademark Office
Pacific Northwest National Laboratory - Visit the Technology Commercialization Program Website
The invention is a method of using enzymes from thiophyllic microbes for selectively breaking the sulfur rubber cross-link bonds in vulcanized rubber. The process is halted at the sulfoxide or sulfone step so that a devulcanized layer is reactive with virgin rubber.
Romine; Robert A. (Pasco, WA), Snowden-Swan; Lesley J. (Benton City, WA)
Battelle Memorial Institute (Richland, WA)
08/ 528,076
September 14, 1995
This invention was made with Government support under Contract DE-AC06-76RLO 1830 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.