Abstract: New compounds are described of the formula: ##STR1## wherein Z is selected from ##STR2## each x is selected from ##STR3## n is an integer from 1-10; each Y is selected from hydrogen, --NH.sub.2, --COQ, --COOQ, --COONHQ, --COOH, --OH, W, halogen and Q; wherein each Q is independently selected from substituted and unsubstituted lower alkenyl and lower alkyl and wherein the substitutuents are selected from --NH.sub.2 halogen, --OH, and --COOH; D is selected from hydroxy, hydrogen and --NH.sub.2 ; and W is selected from ##STR4## wherein each R is independently selected from hydrogen and lower alkyl; R' is selected from ethylene, propylene, isopropylene and phenylene; M is selected from chlorine and hydroxy; A is selected from hydrogen, lower alkyl, lower alkenyl, cycloalkyl, and phenyl; (B) is selected from ##STR5## --CO--, --NHCO--, --O--, --COO--, --N.dbd.N--, or represents a confugate bond; L.sub.1 and L.sub.

Abstract: Radiopaque polymeric materials comprising halogenated barium salts, homogeneously distributed at the molecular level, provide permanent, nonleachable radiopacities at least equivalent to pure aluminum without adversely affecting mechanical or physical properties of compositions in which they are employed.