Flame-retardant plastics molding composition of improved stability

US5326805A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Martin Sicken · Cologne, DE
• Wolfgang Wanzke · Meitingen, DE

Key dates

• Filing date: Jul 30, 1993
• Grant date: Jul 5, 1994
• Expiry date: Jul 30, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/34924
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A flame-retardant plastic molding composition of improved stability comprises PA1 50 to 85% by weight, based on the total amount of the molding composition, of an olefin polymer and PA1 15 to 50% by weight, based on the total amount of the molding composition, of a flameproofing system comprising 80 to 50% by weight of an ammonium polyphosphate of the formula (NH.sub.4 PO.sub.3).sub.n, in which n is a number from 200 to 1000 (=component A) and PA1 50 to 20% by weight of a reaction product of tris(2-hydroxyethyl) isocyanurate (THEIC) of the formula ##STR1## with an aromatic polycarboxylic acid of the formula EQU Ar(COOH).sub.m (=component B). As a result of the flameproofing system to be employed according to the invention, not only is the processing temperature of the plastics molding composition increased, but the water-solubility of components of the molding composition after processing is reduced significantly. Furthermore, the components of plastic provided with a flame-retardant treatment show a reduced tendency to "exude" constituents of the flameproofing system.