Method for the production of ABS compositions having an improved surface following storage in a warm-humid environment

US9714324B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Hans-Juergen Thiem · Dormagen, DE
• Ingmar Hermsdorfer · Krefeld, DE
• Birgit Mannel · Mülheim an der Ruhr, DE
• Andreas Seidel · Dormagen, DE
• Eckhard Wenz · Neunburg vorm Wald, DE
• Hans-Juergen Klankers · Leverkusen, DE
• Lars Frye · Leichlingen, DE
• Hartwig Kempkes · Overath, DE

Key dates

• Filing date: Feb 5, 2014
• Grant date: Jul 25, 2017
• Expiry date: Feb 25, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/035
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a method for producing compositions containing vinyl-aromatic copolymers that are obtained in an emulsion polymerization process and comprise production-related salt inclusions. Said compositions are characterized by improved surface quality following storage in a warm-humid environment and are therefore suitable for producing molded articles having a class A surface that remains flawless over time.