Henkel Ag & Company, Kgaa

Michael Hoeltgen

Dennis Bankmann

Helga Garmann

Ines Seehagen

Hans-Georg Kinzelmann

Christoph Loschen

Ekaterina Ryjkina

Thomas Kostka

Philipp Spuhler

The invention relates to a 2-component polyurethane adhesive, in particular for laminating films, wherein the PU adhesive, based on the total weight of the laminating adhesive composition, (a) contains as resin component at least one NCO-terminated polyurethane pre-polymer having a content of at least 40% by weight of diphenylmethandiisocyanate (MDI), wherein the MDI is 4,4'-diphenylmethandiisocyanate or a mixture thereof with 2,4′-diphenylmethandiisocyanate, and (b) contains as hardener component a polyol mixture comprising at least three different polyols. The invention further relates to the use of the adhesive for adhesively bonding films, to methods for producing composite films, and to composite films bonded by means of the described adhesive.

Low-viscosity, rapid curing laminating adhesive composition

The invention relates to a two-component polyurethane adhesive, in particular for laminating films, wherein the PU adhesive, based on the total weight of the laminating adhesive composition, (a) contains as resin component at least one NCO-terminated polyurethane pre-polymer having a content, based on the total weight of the resin component, of at least 40 wt % of diphenylmethanedi-isocyanate (MDI), wherein the MDI is 4,4'-diphenylmethanediisocyanate or a mixture thereof with 2,4′-diphenylmethanediisocyanate, and 2 to 20 wt % of polyglycol having a molecular weight Mw of 200 to <1000 g per mol, and (b) contains as hardener component a polyol mixture comprising 2, 3, or more different polyols and is free of polyesters. The invention further relates to the use of the adhesive for bonding films, to methods for producing composite films, and to composite films bonded with the adhesive described.

Polyester-free laminating adhesive composition

A method for adhesively bonding film-like substrates, in which a two-component polyurethane adhesive is applied to a film and then a second film is applied, a two-component polyurethane adhesive being used that consists of&#x2014;a component A containing at least one prepolymer having at least two NCO groups,&#x2014;a component B containing at least one polymeric or oligomeric crosslinker having at least two groups that react with NCO groups, wherein component B contains 0.05 to 5 wt. % of a low-molecular-weight compound C, which&#x2014;should have a nucleophilic group that reacts with NCO groups and&#x2014;contains a hydrogen-bridging group, selected from O&#x2550;C&#x2014;Oor O&#x2550;C&#x2014;C&#x2014;Oor O&#x2550;C&#x2014;C&#x2550;C&#x2014;Oor protonated forms.

Method for gluing film-like substrates

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Duesseldorf, Germany

Michael Hoeltgen