Polyoxymethylene molding composition containing melamine formaldehyde polycondensate

US4139575A · kind A · utility

Assignee

• Deutsche Gold- und Silber-Scheideanstalt Vormals Roessler

Inventors

• Herbert Amann · Hanau, DE
• Gerhard Morlock · Hanau, DE

Key dates

• Filing date: Aug 19, 1976
• Grant date: Feb 13, 1979
• Expiry date: Aug 19, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L61/28
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a molding composition comprising a polyoxymethylene, a melamine formaldehyde polycondensate and an antioxidation agent, the improvement wherein said melamine formaldehyde polycondensate is a finely divided, cross-linked, substantially water insoluble polycondensate comprising the precipitation product obtained by reacting formaldehyde and melamine in a molar ratio between 1.2 : 1 and 10.0 : 1; and wherein said polycondensate is in an amount of about 0.001 to about 30 percent by weight, related to the total weight of said composition.