Patent · US Active

Polyaspartic acid ester compositions and method for purification

US10968165B2 · kind B2 · utility

1Cited by

12References

4Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Dorota Greszta-Franz · Erkrath, DE
Christian Drumm · Karlsruhe, DE
Jan Morbach · Cologne, DE
Reiner Witkowski · Bottrop, DE

Key dates

Filing date	Sep 14, 2018
Grant date	Apr 6, 2021
Priority date	—
Expiry date	Sep 14, 2038

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09D175/00
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a method for purifying polyaspartic acid ester compositions and to the provision of polyaspartic acid ester compositions that contain 0.01 to <2% by weight fumaric acid dialkyl esters.

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