Immediate termination of free radical polymerizations
AssigneeBASF SE
InventorsMichael Fried, Gerhard Nestler, Paul Leon Kageler, Lawrence Edwin James
Life of this patent
Estimating the term…
Abstract
Free radical polymerizations are immediately terminated by adding a phenothiazine-containing solution whose solvent comprises at least 50% of its weight of an N-alkylpyrrolidone.
Claims10
A process for immediately terminating a free radical polymerization of at least one monomer comprising adding a phenothiazine-containing inhibitor solution to a system undergoing free radical polymerization, wherein the solvent of the inhibitor solution comprises at least 50% of its weight of an N-alkylpyrrolidone;
- and
- wherein the content of phenothiazine in the inhibitor solution is at least 10% by weight based on the solution.
Apparatus for immediately terminating a free radical polymerization, said apparatus comprising a spray nozzle, and said apparatus containing a phenothiazine-containing inhibitor solution, wherein the solvent of the inhibitor solution comprises at least 50% of its weight of an N-alkylpyrrolidone.
An inhibitor solution containing phenothiazine and at least 50% of its weight of an N-alkylpyrrolidone.
Dependencies are inferred from the claim text.