| abstract |
Disclosed are polymeric dispersants comprising a urethane backbone, at least one pendantly attached imide group, wherein the carbonyl of the imide is chemically bonded to a single or fused aromatic ring. The aromatic rings can be substituted with various electron-withdrawing or electron-releasing groups. Dispersants also contain solvent solubilizing chains of polyethers, polyesters, polyacrylates and or polyolefins. Ideally, the imide group is derived from an imide having 2 isocyanate-reactive groups such that the imide is attached to the urethane backbone at two separate positions. |