2-hydroxyphenyl-s-triazine crosslinkers for polymer networks

US7214742B2 · kind B2 · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• Thomas Bolle · Weil am Rhein, DE
• Andreas Valet · Lörrach, DE
• David G. Leppard · Marly, CH
• Stephen Mark Andrews · New Fairfield, US
• Ramanathan Ravichandran · Nanuet, US
• Markus Grob · Reinach, CH
• Dirk Simon · Mutterstadt, DE

Key dates

• Filing date: Nov 21, 2002
• Grant date: May 8, 2007
• Expiry date: Oct 21, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/3492
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Compounds of the general formula I′in which R2, R21 and R3 independently of one another, are H or —Y—T as defined in claim 1, where T is a reactive group selected from OH, acryl- and methacryloxy and arylcarbonate groups, and further symbols are as defined in claim 1, are effective as crosslinking agents for polymeric networks, especially as in flexographic printing plates, coatings, and plastic containers or films.Further provided is a method of protecting the content of a clear or lightly colored plastic container or film against the deleterious effects of ultraviolet radiation, which method comprises permanently and covalently bonding one or more UV absorbing moieties of a durable s-triazine UV absorber via condensation to a suitable polymer component.