Compositions which undergo light-induced cationic curing and their use

US6084004A · kind A · utility

Assignee

• ESPE Dental AG · DE

Inventors

• Wolfgang Weinmann · Gilching, DE
• Gunther Eckhardt · Frieding, DE

Key dates

• Filing date: Aug 21, 1998
• Grant date: Jul 4, 2000
• Expiry date: Aug 21, 2018

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/038
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention relates to compositions which undergo cationic curing with visible light, comprising: PA0 (a) 0.01 to 8 wt. % of at least one diaryliodonium compound, PA0 (b) 0.01 to 8 wt. % of at least one .alpha.-dicarbonyl compound, PA0 (c) 10.0 to 99.9 wt. % of at least one compound containing epoxide groups and/or oxetane groups, PA0 (d) 0 to 85 wt. % of modifiers, such as fillers, dyestuffs, pigments, flow improvers, thixotropic agents, polymeric thickeners, additives having an oxidizing action, stabilizers and retardants, characterized in that they additionally comprise PA0 (e) 0.001 to 5 wt. % of at least one aromatic amine. The compositions have a low intrinsic color, cure with little smell and, after curing, give compositions with very good mechanical properties.