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. 30, 2016
Filed:
Nov. 27, 2013
Applicant:
Basf SE, Ludwigshafen, DE;
Inventors:
Rolf-Egbert Grützner, Rudolstadt, DE;
Shankara Narayanan Keelapandal Ramamoorthy, Mannheim, DE;
Faissal-Ali El-Toufaili, Ludwigshafen, DE;
Achim Gerstlauer, Limburgerhof, DE;
Achim Stammer, Freinsheim, DE;
Assignee:
BASF SE, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 69/00 (2006.01); C08L 77/00 (2006.01); C08G 69/48 (2006.01); C08G 69/46 (2006.01);
U.S. Cl.
CPC ...
C08G 69/48 (2013.01); C08G 69/46 (2013.01);
Abstract
Process for producing polyamides that are stable during processing, by treating the polyamide during the solid-phase postcondensation process with a gas which comprises carrier gas (inert gas), water, and acid, or an anhydride or lactone or a mixture of these or, respectively, comprises ammonia, or amine, or a mixture of these, at a temperature from 130 to 200° C. and at a pressure of from 0.01 to 10 bar.