Nitrogen-containing bridged derivatives of 6h - dibenz c, e 1,2 - -oxaphosphorin - 6 - oxides, processes for their preparation and their use

摘要

The present invention relates to nitrogen-containing bridged derivatives of 6h - dibenz [c, e] [1,2] - -oxaphosphorin - 6 - oxides, a process for their preparation and their use as flame retardant for polymers, such as, for example, polyesters, polyamides, polycarbonates, polystyrenes, polyethylenes, polypropylenes, phenol - or epoxy resins. The derivatives have the formulae i and ii: