Process for producing a polyester
AssigneeCovestro Intellectual Property GmbH & Co. KG
InventorsMartin Machat, Aurel Wolf, Christoph Guertler, Markus Meuresch
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Abstract
The invention relates to a process for producing a polyester by reacting a H-functional starter substance with a lactone in the presence of a catalyst, wherein the H-functional compound has one or more free carboxyl groups, wherein the lactone is a four-membered ring lactone, and wherein the catalyst is a Brönsted acid or a double metal cyanide (DMC) catalyst. The invention also relates to the polyester that can be obtained by the present invention.
Claims14
A process for preparing a polyester comprising reacting an H-functional starter substance with a lactone in the presence of a catalyst;
- wherein the H-functional compound has one or more free carboxyl groups;
- wherein the lactone comprises a 4-membered-ring lactone;
- and
- wherein the catalyst comprises a Brønsted acid or a double metal cyanide (DMC) catalyst.
Dependencies are inferred from the claim text.