Flame-retardant organic phosphates, their production, and compositions containing them.

摘要

This invention relates to flame-retardant polymeric alkyl aryl phosphates prepared by Friedel-Crafts condensation. The polymeric alkyl aryl phosphates may be made by Friedel-Crafts condensation of chloroalkyl aryl phosphates and alkenyl aryl phosphates derived therefrom. Alernatively, the polymeric alkyl aryl phosphates may be made by Friedel-Crafts condensation of phenols followed by phosphorylation of the Friedel-Crafts condensate. The flame-retardant polymeric alkyl aryl phosphates of the present invention are particularly suitable for use as an additive, having little or no plasticizing effect in flammable organic plastics.