Process for producing thermoplastically processable aromatic polyamide with phosphorus catalyst

US4749768A · kind A · utility

Assignee

• Huls Aktiengesellschaft · DE

Inventors

• Juergen Finke · Marl, DE
• Martin Bartmann · Recklinghausen, DE

Key dates

• Filing date: Feb 13, 1987
• Grant date: Jun 7, 1988
• Expiry date: Feb 13, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G69/32
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for producing aromatic polyamides by melt condensation of PA1 (i) aromatic diamines of the formula EQU H.sub.2 N--Ar'--X--Ar"--Y--Ar"--X--Ar--NH.sub.2 where X=--O-- and Y=--SO.sub.2 -- or X=--SO.sub.2 -- and Y=--O-- and Ar' and Ar"=meta-, para-phenylene, which can be replaced up to 70 mole percent by an aromatic diamine of the formula EQU H.sub.2 N--Ar--((Z)q--Ar).sub.r --NH.sub.2 where Ar=meta-- or para-phenylene; Z=--O--, --S--, --SO.sub.2 --, --CO--, or --C(CH.sub.3).sub.2 -- or mixtures thereof; q=0 or 1; r=0, 1 or 2 and of PA1 (ii) isophthalic acid, which can be replaced up to 60 mole % by terephthalic acid, while both acids can be substituted for by an acid with the formula ##STR1## or a dicarboxylic acid with the general formula EQU HO.sub.2 C--Ar--(A--Ar).sub.p --CO.sub.2 H, where A=--O--, --S--, --SO.sub.2 --, --CO-- or a single bond; and p=0 or 1; in the presence of triphenylphosphite or an acid with the formula H.sub.3 PO.sub.n, where n=2, 3 or 4. The invention further relates to the aromatic polyamides produced by this process.