Functionalized polyoxymethylene block copolymers

US9688814B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Thomas Ernst Müller · Aachen, DE
• Christoph Gürtler · Cologne, DE
• Walter Leitner · Aachen, DE
• Henning Vogt · Aachen, DE
• Gabor Barath · Aachen, DE

Key dates

• Filing date: Dec 18, 2013
• Grant date: Jun 27, 2017
• Expiry date: Feb 1, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/4887
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a method for producing functionalized polyoxymethylene block copolymers comprising the step of polymerizing formaldehyde in a reaction vessel in the presence of a catalyst, the polymerization of formaldehyde in addition taking place in the presence of a starter compound comprising at least 2 Zerewitinoff active H atoms, to obtain an intermediate product. The intermediate product obtained is subsequently reacted with a cyclic carboxylic acid ester or carbonic acid ester, thus obtaining a functionalized polyoxymethylene block copolymer. The invention further relates to functionalized polyoxymethylene block copolymers obtained by such a method and to the use of said copolymers.