Patent · US Expired

Catalytic preparation of hydroxypolyamides

US5096999A · kind A · utility

19Cited by

4References

6Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Ahne Hellmut · Simmerath, DE
Peter Baeuerlein · Schillingsfürst, DE
Albert Hammerschmidt · Erlangen, DE

Key dates

Filing date	Mar 29, 1990
Grant date	Mar 17, 1992
Priority date	—
Expiry date	Mar 29, 2010

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G69/36
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Hydroxypolyamides can be obtained in a simple and economical way in a chloride-free manner when PA1 (a) aromatic amino hydroxy carboxylic acids or PA1 (b) aromatic diaminodihydroxy compounds and aromatic dicarboxylic acids or PA1 (c) aromatic diaminodihydroxy compounds, aromatic dicarboxylic acids and aromatic amino hydroxy carboxylic acids are converted in the presence of 1-ethoxycarbonyl-2-ethoxy-1.2-dihydroquinoline, 1-1'-carbonyldioxy-di-1.2.3-benzotriazole or dicyclohexyl carbodiimide/1-hydroxy-1.2.3-benzotriazole.

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