Bloom-resistant benzotriazole UV absorbers and compositions stabilized therewith

US6380285B1 · kind B1 · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• Mervin Wood · Riverview, US
• Ramanathan Ravichandran · Nanuet, US
• Douglas Horsey · Briarcliff Manor, US
• Anunay Gupta · Edison, US
• Deborah DeHessa · Poughkeepsie, US
• Luther A. R. Hall · Woodcliff Lake, US
• Andrea Smith · Wingdale, US
• Stephen Mark Andrews · New Fairfield, US

Key dates

• Filing date: Feb 1, 2000
• Grant date: Apr 30, 2002
• Expiry date: Feb 1, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D249/20
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Benzotriazole UV absorbers substituted with a ultra long ester or amide moiety wherein the ester or amide group is a hydrocarbyl group of 25 to 100 carbon atoms or is a group of alkyl of 25 to 100 carbon atoms interrupted by 5 to 39 oxygen atoms and terminated with an omega-OH or an omega-OR group exhibit excellent stabilization efficacy while they concomitantly do not bloom when incorporated into polyolefin films. These benzotriazole UV absorbers also provide excellent protection to white, dyed, dipped, unscented and/or scented candle wax from discoloration and degradation.