Method for producing polyoxymethylenes

Details Method for producing polyoxymethylenes Method for producing polyoxymethylenes

2011-01-04

2011-01-04

Gulakowski, Randy (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymerizing in tubular or loop reactor

C528S365000, C528S230000

Reexamination Certificate

active

07863393

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.

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