Process for preparation of oxymethylene polymers in a homogeneous phase, and use

US7943726B2 · 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: May 17, 2011
• Expiry date: Nov 21, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2/08
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process and an apparatus are described for preparation of oxymethylene polymers. This process encompasses polymerization, in a homogeneous phase, of a monomer which forms oxymethylene groups, as far as 90% of maximum conversion in the presence of an acetal of formaldehyde and of an initiator for cationic polymerization, followed by deactivation of the reaction mixture. The resultant oxymethylene polymers have alkyl ether end groups and are extremely stable.