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:
Aug. 17, 2010
Filed:
Feb. 08, 2005
Jürgen Deininger, Oftersheim, DE;
Jürgen Demeter, Ludwigshafen, DE;
Thilo Hahn, Freimersheim, DE;
Gad Kory, Gaiberg, DE;
Oliver Sötje, Mannheim, DE;
Peter Zehner, Ludwigshafen, DE;
Jürgen Deininger, Oftersheim, DE;
Jürgen Demeter, Ludwigshafen, DE;
Thilo Hahn, Freimersheim, DE;
Gad Kory, Gaiberg, DE;
Oliver Sötje, Mannheim, DE;
Peter Zehner, Ludwigshafen, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A continuous process for producing polyamides, their oligomers or mixtures thereof, if appropriate with further reaction products, comprises reaction of aminonitriles or dinitriles and diamines or mixtures thereof, if appropriate together with further polyamide-forming monomers and/or oligomers, with an aqueous medium composed of aqueous monomer and oligomer extracts obtained from polyamide production by extraction of the polymer with water in a reactor which has a vertical longitudinal axis and through which there is a flow substantially in the longitudinal direction wherein water and/or the aqueous medium are introduced into the reactor at two or more different locations along the vertical longitudinal axis, wherein the aqueous medium is introduced at one or more locations.