Patent · US Expired

Method of producing partially aromatic copolyamides from aromatic dicarboxylic acid esters

US5895809A · kind A · utility

2Cited by

6References

19Claims

0Family size

Assignee

EMS-Polyloy GmbH · DE

Inventors

Harald Wagner · Verden, DE
Joachim Ensinger · Thusis, CH
Erich Krumpschmid · Groß-Umstadt, DE

Key dates

Filing date	Feb 13, 1997
Grant date	Apr 20, 1999
Priority date	—
Expiry date	Feb 13, 2017

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G69/28
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to a method of producing partially aromatic copolyamides from polymeric esters of aromatic dicarboxylic acids by amidation of the ester groups with diamines, removal of the split-off alcohols or diols and after-condensation of the low-molecular precondensates as well as by the following compounding to polyamide molding materials.

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