Preparation of polyoxymethylenes
AssigneeBASF SE
InventorsMarian Mours, Rainer Anderlik, Gitta Egbers, Michael Kirschey, Martin Roos
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Abstract
Continuous process for preparing polyoxymethylene homo- or copolymers by bulk polymerization of the monomers in the presence of cationic initiators, and also, if desired, in the presence of regulators, where during the polymerization both the monomers and the polymer are present in molten form and, if desired, the polymer is then deactivated, and the melt is discharged, cooled and pelletized, which comprises discharging, cooling and pelletizing the polymer at an elevated pressure and in the presence of a liquid.
Claims13
A continuous process for preparing polyoxymethylene homo- or copolymers by bulk polymerization of the monomers in the presence of cationic initiators, and optionally in the presence of regulators, where during the polymerization both the monomers and the polymer are present in molten form, which process comprises
- discharging, cooling and pelletizing the melt at an elevated pressure and in the presence of a liquid.
Dependencies are inferred from the claim text.