Inherently radiopaque polymeric products for embolotherapy

An embolotherapy product, comprising a particulate formulation comprising a biocompatible, bioresorbable polymer comprising one or more units of Formula (I):

• and optionally including stereoisomers thereof,
• wherein X═I or Br;
• Y1 and Y2 independently=0, 1, 2, 3 or 4;
• provided that at least one iodine atom is present, or, in the absence of at least one iodine atom, at least two bromine atoms are present;
• wherein f is between 0 and less than 1;
• g is between 0 and 1, inclusive;
• and f+g is between 0 and 1, inclusive;
• wherein A is selected from the group consisting of:
• wherein R1 is independently H or an alkyl group having 1 to about 18 carbon atoms and containing 0 to 5 heteroatoms selected from O and N;
• and R3 is a saturated or unsaturated, substituted or unsubstituted alkyl, aryl, or alkylaryl group containing up to about 18 carbon atoms and 0 to 8 heteroatoms selected from O and N;
• wherein B is an aliphatic linear or branched diol or a poly(alkylene glycol) unit;
• and
• wherein R and R2 are independently selected from:
• wherein R7 is selected from the group consisting of —CH═CH—, —CHJ1-CHJ2- and (—CH2-)a;
• wherein R8 is selected from the group consisting of —CH═CH—, —CHJ1-CHJ2- and (—CH2-)n;
• wherein a and n are independently between 0 and 8 inclusive;
• J1 and J2 are independently Br or I;
• and wherein Q for R2 comprises a free carboxylic acid group and Q for each R is independently selected from the group consisting of hydrogen, carboxylic acid esters and carboxylic acid amides, wherein said esters and amides are selected from the group consisting of esters and amides of alkyl and alkylaryl groups containing up to 18 carbon atoms, and esters and amides of biologically active compounds;
• wherein the embolotherapy product is inherently radiopaque.