Basf Aktiengesellschaft

Basf Se Corporation

Knut Zollner

Achim Stammer

Jens Assmann

Johannes Heinemann

Elmar Stockelmann

Claudius Schwittay

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 &#x3c;90% of the diameter in the polymerization zone.

Method for producing polyoxymethylenes

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), followed by deactivation and discharge from the reactor, which comprises using, as deactivator (d) at least one basic compound having at least 2 amino functions of different reactivity in one molecule.

Basic deactivators for POM production

A process for removing residual monomers from polyoxymethylene homo- or copolymers, comprising the following process steps:

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Mannheim, Germany

Knut Zollner