Patent · US Expired

Process for the preparation of aromatic polyamide in the presence of SiCl.sub.4

US4598143A · kind A · utility

2Cited by

3References

6Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Walter Heitz · Kirchhain, DE
Peter Strohriegl · Bayreuth, DE

Key dates

Filing date	Dec 18, 1984
Grant date	Jul 1, 1986
Priority date	—
Expiry date	Dec 18, 2004

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G69/32
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a process for the preparation of aromatic polyamides mixed with SiO.sub.2, which is characterized in that terephthalic (isophthalic) acid is subjected to polycondensation with aromatic diamines in the presence of SiCl.sub.4 and tertiary aromatic nitrogen heterocyclic compounds, to the polyamides which are produced as a mixture with SiO.sub.2 and to a process for their isolation.

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