Photoinitiator systems with anthracene-based electron donors for curing cationically polymerizable resins

US7537452B2 · kind B2 · utility

Assignees

• The Curators of the University of Missouri · US
• 3M Innovative Properties Company 3M Center · US
• 3M ESPE AG · DE

Inventors

• Joel D. Oxman · Minneapolis, US
• Karsten Dede · Landsberg, DE
• Craig A. Dykstra · Windom, US
• Victoria A. Russell · Brooklyn Park, US
• Christoph Thalacker · Weilheim, DE
• Wolfgang Weinmann · Gilching, DE

Key dates

• Filing date: Aug 16, 2007
• Grant date: May 26, 2009
• Expiry date: Aug 16, 2027

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K6/887
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention features a photopolymerizable composition that comprises a cationically polymerizable resin, and a photoinitiator system comprising an iodonium salt, a visible light sensitizer, and one or more anthracene-based compounds as electron donors. Electron donor combinations used in the invention include multiple substituted anthracene compounds or a combination of at least one substituted anthracene compound with unsubstituted anthracene.