2-(2-hydroxy-3-.alpha. cumyl-5-tert nonyl or dodecyl phenyl)-2H- Benzotriazole UV Absorbers

US5607987A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventors

• Roland A. E. Winter · Armonk, US
• Ramanathan Ravichandran · Nanuet, US
• Mark S. Holt · West Nyack, US
• Volker H. von Ahn · Mahopac, US
• Joseph E. Babiarz · Amawalk, US
• David G. Leppard · Marly, CH

Key dates

• Filing date: Apr 5, 1996
• Grant date: Mar 4, 1997
• Expiry date: Apr 5, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C1/8155
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Soluble and thermally stable benzotriazole UV absorbers typified by those of formula I ##STR1## where R.sub.1 is hydrogen or chloro, R.sub.2 is alkyl or --CH.sub.2 CH.sub.2 COOR.sub.4 where R.sub.4 is hydrogen, alkyl or alkyl substituted with hydroxyl, and R.sub.3 is .alpha.-cumyl, provide excellent light stability protection to electro coat, base coat or clear coat finishes. The new soluble, crystalline form of 2-(2-hydroxy-3-.alpha.-cumyl-5-tert-octylphenyl)-2H-benzotriazole is particularly effective.