Process for preparation of oxymethylene polymers, selected polymers, and their use

US7812110B2 · kind B2 · utility

Assignee

• Ticona LLC · US

Inventors

• Michael Haubs · Bad Kreuznach, DE
• Joachim Clauss · Scheinfeld, DE
• Michael Hoffmockel · Niedernhausen, DE
• Jurgen Lingnau · Mainz, DE
• Arnold Schneller · Mainz, DE

Key dates

• Filing date: Dec 21, 2006
• Grant date: Oct 12, 2010
• Expiry date: Feb 22, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L59/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

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.