Oxidation resistant natural rubber and a method for its production
AssigneeCooper Tire & Rubber Company
InventorsHoward A. Colvin, Zachary D. Walters
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Abstract
A method for stabilizing a natural rubber such as guayule. The method includes the step of introducing at least one of an Extraction Curves for Guayule Rubber Samples amine and a phenolic anti-oxidant, such as MADA, to a latex form of the rubber under conditions such that the anti-oxidant becomes chemically bound to the rubber. The method includes the further step of subsequently treating the rubber to remove at least a substantial portion of entrained resins. The method can yield a rubber composition of, for example, guayule rubber and including an anti-oxidant chemically bound thereto. The resultant rubber can be suitable for use in tire construction.
Claims21
A method for stabilizing a natural rubber such as guayule comprising the step of introducing MADA to a latex form of the rubber under conditions such that the MADA becomes chemically bound to the rubber and subsequently treating said rubber to remove at least a substantial portion of entrained resins.
(canceled)
A method for stabilizing a non-Hevea natural rubber comprising the step of introducing at least one of an amine and a phenolic anti-oxidant to a latex form of the rubber under conditions such that the anti-oxidant becomes chemically bound to the rubber and subsequently treating said rubber to remove at least a substantial portion of entrained resins.
A rubber composition comprised of cis-1,4-polyisoprene and including an anti-oxidant chemically bound thereto, said composition containing less than 20% of the proteins associated with Hevea rubber and further including at least a trace of resins present in other natural rubbers.
A method of preparing guayule rubber comprising coagulating guayule latex and continuously extracting the coagulated rubber with a polar solvent.
Dependencies are inferred from the claim text.