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:
Jun. 12, 2018
Filed:
Jun. 11, 2014
Basf SE, Ludwigshafen, DE;
Christian Schmidt, Ludwigshafen, DE;
Joachim Clauss, Darmstadt, DE;
Axel Wilms, Frankenthal, DE;
Volker Rauschenberger, Eisenberg, DE;
Gad Kory, Gaiberg, DE;
Stefan Schwiegk, Neustadt, DE;
Arnold Schneller, Seeheim-Jugenheim, DE;
Achim Stammer, Freinsheim, DE;
Frank Niedermaier, Ladenburg, DE;
Bernd Hackel, Mutterstadt, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The present invention relates to a process for the preparation of an aliphatic or partially aromatic polyamide, in which an aqueous composition of the monomers is subjected to an oligomerization at elevated temperature and increased pressure, the reaction mixture is optionally subjected to a first decompression to reduce the water content, the (optionally decompressed) reaction mixture is heated within a short time to a temperature above the melting temperature of the polyamides and the heated reaction mixture is subjected to a (further) decompression to reduce the water content and to an after-polymerization.