Alberdingk U 7654 Aliphatic polyester-polyurethane Alberdingk Boley PU - Polyurethane dispersions (PUDs) >> Polyester PU ADHESIVE ALBERDINGK ® U 7654 Polyurethane Dispersion Aqueous Polyurethane dispersion without free isocyanate groups foam and rubber foam adhesives Aqueous polyurethane dispersion without free isocyanate groups. Used in foam and rubber foam adhesives.