Colorant concentrates for dyeing polyoxymethylene moulding materials

US6306940A · kind A · utility

Assignee

• Ticona LLC · US

Inventors

• Stefan Disch · Goldbach, DE
• Peter Eckardt · Hofheim, DE
• Michael Hoffmockel · Niedernhausen, DE
• Karl-Friedrich Muck · Wiesbaden, DE
• Gerhard Reuschel · Leingarten, DE

Key dates

• Filing date: Jul 25, 2000
• Grant date: Oct 23, 2001
• Expiry date: Jul 25, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2459/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Colorant concentrates made from free-flowing polyoxymethylene copolymer as carrier, 15-80% by weight of colorant, 2-15% by weight of nitrogen-containing stabilizer and 0-15% by weight of dispersion aid for coloring pellets or molding compositions made from polyoxymethylene (POM) and for producing colored injection moldings or colored POM extrudates. The products produced with this colorant preparation are particularly stable during processing and have very low formaldehyde emissions.