Removal of acrylonitrile from latex with oximes
AssigneeThe Goodyear Tire & Rubber Company
InventorsMichael L. Senyek, Albert J. Costanza
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Abstract
Acrylonitrile is a monomer that is widely used in the synthesis of a vast variety of polymers. Undesirable quantities of unpolymerized residual acrylonitrile are often present in these acrylonitrile polymers. This residual or free acrylonitrile dissolved in an acrylonitrile polymer and/or its emulsifier system and the water phase used in its polymerization can be reduced significantly in concentration by treatment with oximes. Oximes react with acrylonitrile by an oxygen-cyanoethylation reaction which results in the formation of a cyanoethyl oximino ether linkage.
Claims14
An improved process for reducing the concentration of free acrylonitrile in an acrylonitrile polymer emulsion containing free acrylonitrile, comprising adding to said acrylonitrile polymer emulsion an oxime in amounts and under conditions sufficient to react with said free acrylonitrile to form a cyanoethyl oximino ether linkage.
Dependencies are inferred from the claim text.