Bloom-resistant benzotriazole UV absorbers and compositions stabilized therewith

US6508847B2 · kind B2 · 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: Dec 20, 2000
• Grant date: Jan 21, 2003
• Expiry date: May 15, 2021

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 an 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.