Polyoxymethylene having improved acid stability

US5393813A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Stephanie Schauhoff · Frankfurt, DE
• Edwin Nun · Billerbeck, DE
• Detlef Arnoldi · Weisenheim am Berg, DE

Key dates

• Filing date: Oct 22, 1993
• Grant date: Feb 28, 1995
• Expiry date: Oct 22, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L75/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

By adding melamine cyanurate, polyoxymethylene is stabilized against acid attack, wherein in particular as little as under 3 parts of MCA per 100 parts of POM are effective. The weight loss of a stabilized POM under the action of acid may be less than 3% of that of an unstabilized POM. The product is useful in products which are exposed to acidic agents such as irrigation systems, dishwashers, sanitary installations.