Alberdingk U 7641 Aliphatic polyester-polyurethane Alberdingk Boley PU - Polyurethane dispersions (PUDs) >> Polyester PU ADHESIVE ALBERDINGK ® U 7641 Polyurethane Dispersion ALBERDINGK ® U 7641 is an aqueous dispersion of an aliphatic polyester-polyurethane without free isocyanate groups. For high flexible permanent tacky adhesives. As primer with good adhesion on leather, textile and plastic as well as a combination dispersion for adhesive acrylic dispersions. heat sensitive adhesives foam and rubber foam adhesives Aqueous dispersion of an aliphatic polyester-polyurethane without free isocyanate groups. Used in high flexible permanent tacky adhesives, heat sensitive adhesives and foam and rubber foam adhesives.