Method for Producing Polyoxymethylenes
AssigneeBASF SE
InventorsJens Assmann, Knut Zollner, Johannes Heinemann, Elmar Stockelmann, Achim Stammer
Life of this patent
Estimating the term…
Abstract
Process for preparation of polyoxymethylenes via polymerization of the monomers a) in the presence of cationic initiators b), and also, if appropriate, in the presence of regulators c), and subsequent deactivation and isolation of the polymer, which comprises undertaking the polymerization in a tubular reactor with static mixing elements and with a mixing zone, a polymerization zone, and a deactivation zone, the diameter of the tubular reactor in the mixing zone being <90% of the diameter in the polymerization zone.
Claims21
1-13. (canceled)
A process for preparation of polyoxymethylenes via polymerization of the monomers a) in the presence of cationic initiators b), and also, if appropriate, in the presence of regulators c), and subsequent deactivation and isolation of the polymer, which comprises undertaking the polymerization in a tubular reactor with static mixing elements and with a mixing zone, a polymerization zone, and a deactivation zone, the diameter of the tubular reactor in the mixing zone being <90% of the diameter in the polymerization zone and the diameter of the deactivation zone of the reactor being <95% of the diameter of the polymerization zone.
Dependencies are inferred from the claim text.