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:
Jul. 11, 2006
Filed:
Jul. 26, 2002
Ulrich Steinbrenner, Neustadt, DE;
Martin Haubner, Eppelheim, DE;
Achim Gerstlauer, Ludwigshafen, DE;
Thomas Domschke, Speyer, DE;
Christoph Sigwart, Schriesheim, DE;
Stefan Käshammer, Schifferstadt, DE;
Ulrich Steinbrenner, Neustadt, DE;
Martin Haubner, Eppelheim, DE;
Achim Gerstlauer, Ludwigshafen, DE;
Thomas Domschke, Speyer, DE;
Christoph Sigwart, Schriesheim, DE;
Stefan Käshammer, Schifferstadt, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
In a process for the single-stage preparation of polytetrahydrofuran and/or tetrahydrofuran copolymers having a mean molecular weight of from 650 to 5000 dalton by polymerization of tetrahydrofuran over an acid catalyst in the presence of at least one telogen and/or comonomer, the telogen and/or comonomer is added at at least two addition points in different segments of the polymerization apparatus.