Nitrous bridged derivatives of 6h-dibenz[c,e][1,2]-oxaphosphorine-6-oxides, process for the preparation and use thereof

Abstract

The invention refers to nitrous bridged derivatives of 6H-dibenz[c,e][1,2]-oxaphosphorine-6-oxides, a process for the preparation thereof and their use as flameproofing agents for polymers such as polyesters, polyamides, polycarbonates, polystyrenes, polyethylene, polypropylene, phenolic and epoxy resins. The derivatives have the Formulae I or II:

1 - 21 . (canceled) 
     
     
         22 . An oligomer of the 1,3,5-tris(2-hydroxyethyl)cyanuric acid of the Formula (IV) 
       
         
           
           
               
               
           
         
       
       wherein m is an integer from 1 to 20 and n and o are 0 or integers from 1 to 20. 
     
     
         23 . The oligomer according to  claim 22 , having the Formula (IVa) 
       
         
           
           
               
               
           
         
       
       the structure of which derives from Formula (IV) in which m is an integer from 1 to 20 and n and o are 0.