Nouvelles résines époxydes ignifuges

VII. Mitteilung über Chemie der Epoxyharze

Abstract

The use of epoxy resins in the construction trade is constantly increasing. For this purpose it is greatly preferable to use fire-resisting or fire-proof resins. During recent years attempts have been made to produce such resins kinds, through the addition of phosphorus or halogens. Such addition may be made by adding phosphorated or halogenated derivatives which are non-active or contain only one epoxy group per molecule to conventional epoxy derivatives, but then, in general, the mechanical properties of the resins so obtained are less favourable. Interesting fireproof resins can also be made by utilising as hardeners anhydrides of halogenated acids, but here again the properties of the resins so obtained are, not as good as those obtained through the use of conventional hardeners.
We have sought to prepare new halogenated or phosphorated derivatives containing two or more epoxy groups per molecule. The products at which we have arrived can be hardened with acid anhydrides as well as with amines, and lead to incombustible resins. When mixed, in proper proportions, with conventional resins, they confer on the latter fireproof properties. In our new products the halogens and the phosphorus show good stability and the mechanical and electrical properties of the hardened resins are very interesting.