abstract |
Compounds of the formulas ##STR1## WHEREIN: X represents oxygen or sulfur; n Z represents the residue of a hydroxyl-containing moiety; n R 1 and R 2 in formula (1) may be the same or different and individually represent alkyl, cycloalkyl or aryl and, together with the common nitrogen atom, represent a 5 or 6-member ring containing oxygen, sulfur or nitrogen or combination thereof; n Nr 1 r 2 in formula (2) represent a 5 or 6-member ring containing oxygen, sulfur or nitrogen or combination thereof; n n represents an integer having a value of 2 or greater and is equal to the number of hydroxyl groups on the original hydroxyl-containing moiety; n Are prepared by reacting a phosphorohalidate with an amine in an organic solvent containing aqueous alkali metal or ammonium hydroxide. n The compounds are useful as flame retardants for natural and synthetic materials. |