Henkel Kommanditgesellschaft Auf Aktien

Henkel Ag & Company, Kgaa

Hermann-Josef Plum

Herbert Fischer

Thomas Moeller

Norbert Huebner

Bernhard Herlfterkamp

Ralf Gossen

Ethel Abrahams-Meyer

Nicolas De Calmes

Ingo Gensch

Victor Dario Buj Vilalata

A Waterborne adhesive comprising 1 to 50 weight-% of a (meth)acrylate copolymer manufactured by polymerization of at least one ester of methacrylic acid, acrylic acid, crotonic acid and/or itaconic acid with aliphatic alcohols, substituted aliphatic alcohols, aromatic alcohols, polyether glycols, and other copolymerizable monomers, having an acid number from 0 to 150 mgKOH/g, 0 to 40 wt-% of natural polymers 0.5 to 30 wt-% of urea, 0.1 to 20 wt-% of additives, characterized in that the adhesive contains 0.05 to 20 weight-% of a super absorbent polymer.

Waterborne adhesive with improved wet adhesion

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

Juelich, Germany

Hermann-Josef Plum