| abstract |
X-ray opaque esters or amides of iodosubstituted benzoic acid according to formula I and polymers and dental materials produced therefrom. <IMAGE> Formula I R1=hydrogen or C1 to C3 alkyl, preferably H or CH3; R2=straight-chain or branched C1 to C6 alkylene, oxyalkylene or arylene, preferably C2 to C4 alkylene and particularly preferably -CH2-CH2- and -CH2CH(-)CH2-; X=O or NH, preferably O; R3-R7=at least 3 iodine substituents, preferably in R3, R4 and R6 or R3, R5 and R7 position, the other groups are hydrogen, C1 to C6 alkyl, C1 to C6 alkoxy, -Cl, -Br, -OH, -NH2, -N(C1 to C6 alkyl)2 or -NH-CO-(C1 to C6 alkyl), preferably R3, R4, and R6 are=I and R5 and R7=H, or R3, R5 and R7=I and R4 and R6=-NH(COCH3); n=1, 2 or 3, preferably 1 or 2. The benzoic acid esters and amides according to the invention can be well polymerized radically or anionically, the polymers are well soluble in the usual dental monomers. Dental materials produced from the monomers or polymers are characterized in that the X-ray opaque component is bonded covalently into the polymeric matrix material and cannot therefore be washed out. Furthermore, excellent X-ray opacity can be achieved without using fillers. |