Synthesis of benzotriazole monomer

US7825257B1 · kind B1 · utility

Assignee

• BAUSCH & LOMB INCORPORATED · US

Inventors

• Keshav Deo · Salumbar, IN
• Chandrakant C. Shah · Salumbar, IN
• Kalpesh Ravajibhai Patel · Kheda, IN
• Nilpesh Patel · Salumbar, IN
• Viral Parekh · Morbi, IN
• Ronak Patel · Vadodara, IN
• Jignesh Soni · Patan, IN
• Hiral Shah · Salumbar, IN
• David E. Seelye · Williamsville, US
• Mahendra Nandu · Pittsford, US

Key dates

• Filing date: Oct 17, 2008
• Grant date: Nov 2, 2010
• Expiry date: Nov 1, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F7/083
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The synthesis of benzotriazole monomers and the use of the benzotriazole monomers and one or more other monomers to prepare ultraviolet (UV) light absorbing polymer compositions. The synthetic methods described in this application provide a significant improvement over the previous methods used to prepare benzotriazole monomers.