Sterically hindered amine light stabilizers

US9045480B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Kai-Uwe Schoning · Oberwil, CH
• Adriana Edenharter · Bellinzona, CH
• Stefan Hauck · Lampertheim, DE

Key dates

• Filing date: Jun 1, 2010
• Grant date: Jun 2, 2015
• Expiry date: Jun 1, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D471/10
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The disclosure concerns sterically hindered amine light stabilizers (HALS) with low basicity at the nitrogen atom and high thermal stability. They are characterized by their spiro-substitution in the 4-position of the tetramethylpiperidine ring (Spiro-NOR-HALS). These compounds are useful in stabilizing polymers, especially thermoplastic polyolefins, against the deleterious effects of oxidative, thermal and actinic radiation. The compounds are also useful in stabilizing acid catalyzed and ambient cured coatings systems. They are particularly useful when high processing temperatures are additional required.