A Novel DOPO-Based Diamine as Hardener and Flame Retardant for Epoxy Resin Systems

✍ Scribed by Johannes Artner; Michael Ciesielski; Olaf Walter; Manfred Döring; Raul M. Perez; Jan K. W. Sandler; Volker Altstädt; Bernhard Schartel

• Book ID: 102485520
• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 294 KB
• Volume: 293
• Category: Article
• ISSN: 1438-7492
• DOI: 10.1002/mame.200700287

✦ Synopsis

Abstract

10‐Ethyl‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (1) can be nitrated using acetic anhydride and fuming nitric acid. The nitro group is reduced using palladium on charcoal and hydrogen. These reaction conditions are used for the synthesis of an analogous DOPO‐based diaminic hardener (7). An evaluation of the curing behavior, mechanical properties and flammability of a neat resin made of DGEBA and 7 (DGEBA + 7) and of a carbon fiber‐reinforced resin made of DGEBA, 4,4′‐diaminodiphenylsulfon (DDS) and 7 (DGEBA + DDS + 7) shows the potential of this hardener to lead to flame‐retardant systems while keeping relevant properties on a high level; especially when compared to a similar system (DGEBA + DDS + 1).

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