Thermoplastic molding compositions on the basis of polyoxymethylenes

US4181685A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Rudolf Kern
• Heinz Schmidt · Stuttgart, DE
• Karlheinz Burg
• Ernst Wolters
• Gunter Sextro · Wiesbaden, DE

Key dates

• Filing date: Apr 14, 1976
• Grant date: Jan 1, 1980
• Expiry date: Apr 14, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L59/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Thermoplastic molding compositions having improved properties are composed of a mixture of from 99.999 to 90% by weight of a linear polyoxymethylene and from 0.001 to 10% by weight of a branched or cross-linked polyoxymethylene. The linear polyoxymethylenes are homopolymers of formaldehyde or of trioxane or copolymers of trioxane and at least one compound of monofunctional reaction which can be copolymerized with trioxane. The branched or cross-linked polyoxymethylenes are copolymers of trioxane and a multifunctionally reacting compound, or copolymers of trioxane, a monofunctionally reacting compound and a branched or cross-linked polyether. The molding compositions yield shaped articles having improved mechanical properties.