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. 12, 2010
Filed:
Dec. 21, 2006
Michael Haubs, Bad Kreuznach, DE;
Joachim Clauss, Darmstadt-Eberstadt, DE;
Michael Hoffmockel, Niedernhausen, DE;
Jürgen Lingnau, Mainz, DE;
Arnold Schneller, Seeheim-Jugenheim, DE;
Michael Haubs, Bad Kreuznach, DE;
Joachim Clauss, Darmstadt-Eberstadt, DE;
Michael Hoffmockel, Niedernhausen, DE;
Jürgen Lingnau, Mainz, DE;
Arnold Schneller, Seeheim-Jugenheim, DE;
Ticona GmbH, Kelsterbach, DE;
Abstract
A process is described for preparation of oxymethylene homo- and copolymers. This encompasses heterogeneous polymerization of a monomer which forms oxymethylene groups in the presence of an acetal of formaldehyde and of an initiator for cationic polymerization, followed by the deactivation of the polymer in a homogeneous phase via treatment with a basic aprotic solvent or with an aprotic solvent which comprises a base. Oxymethylene homopolymers with very high stability are also described.