Polyacetal compositions containing a non-meltable polymer stabilizer improved with a minor amount of at least one meltable co-stabilizer and at least one primary antioxidant

US5063263A · kind A · utility

Assignee

• E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

• Richard Allen Hayes · Brentwood, US
• Leonard E. R. Kosinski · Washington, US
• Mark E. Wagman · Wilmington, US

Key dates

• Filing date: Jun 11, 1990
• Grant date: Nov 5, 1991
• Expiry date: Jun 11, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L83/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Incorporation into polyacetal molding compositions stabilized for processing with a non-meltable polymer stabilizer of 0.01-1.00 weight percent of at least one meltable co-stabilizer, said co-stabilizer being a thermal stabilizer for polyacetal, and 0.02-1.0 weight percent of at least one primary antioxidant results in significantly improved long term stability, as evidenced by greater retention of physical properties over time, of such compositions.