Patent · US Active

Polyester carbonates from cycloaliphatic diacids and aliphatic diols, and process for preparing same

US12173150B2 · kind B2 · utility

0Cited by

2References

14Claims

0Family size

Assignee

Covestro Intellectual Property GmbH & Co. KG · DE

Inventors

Alexander Meyer · Mülheim an der Ruhr, DE
Thomas Pfingst · Tönisvorst, DE
Helmut-Werner Heuer · Krefeld, DE
Jan Heijl · Loferer, DE
Annabelle Bertin · Strasbourg, FR

Key dates

Filing date	Dec 12, 2019
Grant date	Dec 24, 2024
Priority date	—
Expiry date	Jan 13, 2042

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G64/305
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a method for preparing a polyester carbonate starting from cycloaliphatic diacids and aliphatic diols and to the polyester carbonate prepared by the method. The method according to the invention is a direct synthesis in which all the structural elements that form the subsequent polyester carbonate are already present as monomers in the first step of the method.

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