Luvitec VPI55 K72W Vinylpyrrolidone / vinylimidazole copolymer BASF Polyvinyl acetate emulsions & derivatives (PVAc…) ADHESIVE >> Hot-melt Luvitec VPI55 K72W Vinylpyrrolidone/vinylimidazole copolymer In VP copolymers with basic N-vinylimidazole (VI) the complex formation properties of both polymer components complement one another in a special way. While the pyrrolidone unit primarily forms hydrogen bonds, the imidazole structure possesses a marked tendency to complex formation both with organic substrates (e.g. proteins, enzymes and dyes) as well as with metal ions. A characteristic feature is the high selectivity, especially with respect to heavy metal ions, such as for example iron, copper, nickel and silver. Due to their ability to form complexes with metal ions and dyes, VP/VI co- polymers are used e.g. in the photo- graphic industry. Their high affinity for numerous colorants is exploited in the dyeing of textile fibers and plastic surfaces as well as in the printing of special papers. VP/VI copolymers distinguish them- selves by especially good adhesion to glass and metal surfaces. VI copoly- mers are already employed as coup- ling agents in corrosion prevention. reinforced complex formation improved adhesion Adhesives Glue sticks Exhibits high adhesiveness (initial tack), outstanding adhesion and bonding to paper. Hot-melt adhesives Good adhesion, especially to glass, metal, paper and plastic surfaces; particularly suited for the production of remoistenable or watersoluble adhesives. Skin adhesives Viscosity modifier, toxicological safeness, readiness of crosslinking and formation of hydrogels - important properties in the production of flexible, skin-adhesive pads which adhere well. Vinylpyrrolidone/vinylimidazole copolymer. Used in glue sticks, remoistenable and watersoluble hot-melt adhesives and flexible, skin-adhesive pads. Provides high selectivity, especially with respect to heavy metal ions, such as iron, copper, nickel and silver and ability to form complexes with metal ions and dyes. Offers reinforced complex formation and improved adhesion to glass and metal surfaces.