Henkel Kommanditgesellschaft Auf Aktien

Henkel Kommanditgesellschaft Auf Aktien (henkel Kgaa)

Ingo Gensch

Thomas Moeller

Herbert Fischer

Norbert Huebner

Marcus Heemann

Bernhard Herlfterkamp

Wolfgang Klingberg

Hermann-Josef Plum

Water-soluble or water-dispersible hotmelt adhesives are prepared using graft copolymers produced by graft copolymerizing olefinically unsaturated monomers onto polyalkylene oxides. The adhesives additionally contain at least one resin which improves tackiness and the compatibility of the adhesive components. Other components such as polymers, plasticizers, and additives may also be present. The adhesives are especially suited for use in the labelling of recyclable or reuseable hollow containers. The adhesive may be completely separated from the hollow containers and dissolved in an alkaline washing liquor even at low temperatures.

Hot melt adhesives based on graft copolymers

The invention relates to a contact adhesive based on a polyurethane of at least one diisocyanate and at least one low molecular weight polyethylene glycol, the polyethylene glycol having a molecular weight of up to 2,000 and the polyurethane having a degrees of crystallization of less than 20%. The contact adhesive can be applied from the melt or from an aqueous solution or dispersion. Surprisingly, it is suitable not only for polar plastic surface, but above all for PE and PP surfaces and of course for paper. Accordingly, the contact adhesive is preferably useful for applying paper labels to PE bottles.

Polyurethane adhesive

Growing community of inventors

Gangelt, Germany

Ingo Gensch