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:
Oct. 04, 2011
Filed:
May. 25, 2007
Applicants:
Tobias Wabnitz, Mannheim, DE;
Stephan Hatscher, Syke, DE;
Stefan Käshammer, Schifferstadt, DE;
Rolf Pinkos, Bad Dürkheim, DE;
Inventors:
Tobias Wabnitz, Mannheim, DE;
Stephan Hatscher, Syke, DE;
Stefan Käshammer, Schifferstadt, DE;
Rolf Pinkos, Bad Dürkheim, DE;
Assignee:
BASF SE, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G 59/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a process for preparing polytetrahydrofuran or tetrahydrofuran copolymers by polymerization of tetrahydrofuran in the presence of a telogen and/or a comonomer over a fixed bed of an acid catalyst, in which the temperature of the polymerization mixture increases in the direction of flow through the catalyst bed.