Halogen-substituted esters of phosphorous acid, polymeric compositions containing them as reactive flame retardants.

摘要

Novel esters of pentavalent phosphorus acid having the formula

wherein R and R min are haloalkyl containing from 2 to 6 carbon atoms and from 1 to 6 halogen atoms; n is an integer of from 1 to 3; each X is independently selected from hydrogen, halogen, alkyl, or hydroxyl, provided that at least one X is hydroxyl. The above compounds are effective reactive flame retardants in polyurethane and polyester polymeric compositions.