Patent · US Active

Method for producing formaldehyde/CO2 copolymers

US9469715B2 · kind B2 · utility

0Cited by

8References

18Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Thomas Ernst Müller · Aachen, DE
Christoph Gürtler · Cologne, DE
Henning Vogt · Aachen, DE
Mario Krautschick · Bergheim, DE
Walter Leitner · Aachen, DE

Key dates

Filing date	Dec 17, 2013
Grant date	Oct 18, 2016
Priority date	—
Expiry date	Dec 17, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L59/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to a method for producing non-alternating formaldehyde/CO2 copolymers, said method comprising the step of reacting formaldehyde or a compound that releases formaldehyde with carbon dioxide in the presence of a catalyst system. Said method is characterized in that the catalyst system comprises a Lewis acid component and a basic component, the Lewis acid component being at least temporarily coordinatively unsaturated under reaction conditions and the basic component having a pKb value of >=0.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.