Benzotriazole/HALS molecular combinations and compositions stabilized therewith

US7419513B2 · kind B2 · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• Mervin Wood · Riverview, US
• Jacqueline Lau · Hicksville, US
• Ramanathan Ravichandran · Nanuet, US
• Andrea Smith · Wingdale, US
• Joseph Suhadolnik · Ossining, US
• Peter Solera · Suffern, US
• Joseph Puglisi · Crompond, US
• Carmen Hendricks-Guy · White Plains, US
• Stephen D. Pastor · Danbury, US
• Luther A. R. Hall · Woodcliff Lake, US

Key dates

• Filing date: Sep 13, 2004
• Grant date: Sep 2, 2008
• Expiry date: Sep 29, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/3475
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compounds which have a benzotriazole and a hindered amine moiety in the same molecule are typified by the formula Awherein at least one of G2, R1 or R2 contains a hindered amine moiety are extremely effective light stabilizers having both the UV absorbing activity of a benzotriazole and the light stabilizing efficacy of a hindered amine in the same molecule. These compounds are effective stabilizers for thermoset resin compositions, thermoplastic resin compositions, for photographic applications, for pigmented or dyed polypropylene, polyamide or polyester fibers, and for white, dyed, dipped, unscented and/or scented candle wax against discoloration and fading when incorporated therein alone or in combination with an antioxidant.