UV-stabilizer concentrates based on TPU, a process for their production and utilization

US5484827A · kind A · utility

Assignee

• BASF Elastogran GmbH · DE

Inventors

• Frank Prissok · Bohmte, DE
• Friedhelm Lehrich · Bohmte, DE
• Gerhard Lehr · Schwegenheim, DE
• Aleksander Glinka · Osnabrück, DE
• Douglas J. Harrop · Hude, DE

Key dates

• Filing date: Sep 30, 1994
• Grant date: Jan 16, 1996
• Expiry date: Sep 30, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2475/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention provides UV-stabilizer concentrates, which, relative to the total weight, consist of PA1 A) 40 to 80 weight-% of at least one thermoplastic polyurethane PA1 B) 10 to 30 weight-% 1,3,5-tri-glycidyl-isocyanurate and PA1 C) 10 to 30 weight-% 2-(2-hydroxy-3,5,-di-tert-amyl-phenyl)-2H-benzotriazole and/or 1,6-hexane-di-yl-bis-(3-(3-benzotriazole-N-yl)-4-hydroxy-5-tert-butyl)-phe nyl-propanoate. The invention also discloses a process for their production, and their utilization to stabilize TPU against UV- and thermal-degradation.