Fireproofed thermoplastic molding materials containing red phosphorus and based on polyesters or polyamides

US4877823A · kind A · utility

Assignee

• BASF SE

Inventors

• Christoph Plachetta · Schifferstadt, DE
• Graham E. McKee · Ludwigshafen, DE
• Hans-Peter Weiss · Mutterstadt, DE

Key dates

• Filing date: Apr 19, 1988
• Grant date: Oct 31, 1989
• Expiry date: Apr 19, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L77/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Fireproofed thermoplastic molding materials which contain red phosphorus as a flame-proofing agent are obtainable by mixing PA1 (A) from 5 to 95% by weight of a polyamide or of a polyester or of a mixture of these, PA1 (B) from 5 to 95% by weight of an elastomer dispersion containing, as essential components, PA2 (b.sub.1) from 5 to 75% by weight of an elastomer prepared by emulsion polymerization, PA2 (b.sub.2) from 10 to 70% by weight of red phosphorus, p2 (b.sub.3) from 10 to 80% by weight of water and PA2 (b.sub.4) from 0.1 to 5% by weight of dispersant, and PA1 (C) from 0 to 60% by weight of fibrous or particulate fillers or a mixture of these, the total content of red phosphorus in the molding material being from 3 to 20% by weight, based on the total weight of the molding material, and the elastomer composition being introduced into a melt of the polyamide or of the polyester or of a mixture of these.