The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 04, 2011
Filed:
Nov. 28, 2005
Jens Assmann, Mannheim, DE;
Knut Zollner, Mannheim, DE;
Johannes Heinemann, Brussel, BE;
Elmar Stockelmann, Mannheim, DE;
Achim Stammer, Freinsheim, DE;
Jens Assmann, Mannheim, DE;
Knut Zollner, Mannheim, DE;
Johannes Heinemann, Brussel, BE;
Elmar Stockelmann, Mannheim, DE;
Achim Stammer, Freinsheim, DE;
BASF AG, Ludwigshafen, DE;
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.