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. 16, 2016
Filed:
Sep. 19, 2013
Basf SE, Ludwigshafen, DE;
Markus Bubolz, Luebbecke, DE;
Karl Haeberle, Speyer, DE;
Kai Henke, Brockum, DE;
Dirk Kempfert, Stemwede-Dielingen, DE;
Markus Kraemer, Lambsheim, DE;
Sven Lawrenz, Ilvesheim, DE;
Frank Schaefer, Stemwede Haldem, DE;
Maria Thomas, Muehlen, DE;
Ulrich Treuling, Bensheim, DE;
BASF SE, Ludwigshafen, DE;
Abstract
A process for producing a polycarbodiimide, comprising polymerizing a diisocyanate in the presence of a carbodiimidization catalyst in a reaction vessel in liquid phase at a temperature in the range of from 20 to 250° C., at a pressure in the range of from 20 to 800 mbar and in the presence of at least one inert gas, wherein the at least one inert gas is introduced into the liquid phase in the reaction vessel with a flow rate in the range of from 0.1 x/h to 100 x/h, x being the volume of the reaction vessel.