Bostik Sa

Francis Pardal

David Penet

Guillaume Michaud

Aurélien Wiegand

The invention relates to an adhesive dual-component composition based on polyurethane, comprising an &#x2014;NCO component and an &#x2014;OH component such that: the &#x2014;NCO component is a composition comprising: A) at least one polyurethane prepolymer comprising at least two NCO terminal groups obtained by the polyaddition reaction of at least one dissymmetric diisocyanate monomer and at least one diol, and B) at least one triisocyanate selected from isocyanurates, biurets, diisocyanate and triol adducts, and the mixtures thereof; the &#x2014;OH component is a composition comprising at least one polyol; at least one of the polyols or diols is selected from polyether polyols (or polyether diols); at least one of the polyols or diols is selected from polyester polyols (or polyester diols); and the weight ratio of the quantity of polyether polyol(s) to the quantity of polyester polyol(s), defined as r, ranges from 0.6 to 2.2.

Adhesive dual-component composition based on polyurethane

1) Two-component polyurethane-based adhesive composition comprising an &#x2014;NCO component and an &#x2014;OH component, such that: 2) Multilayer film comprising 2 thin layers of material linked to one another by a continuous layer constituted by said crosslinked adhesive composition. 3) Process for preparing said film and use thereof in the manufacture of flexible packagings.

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Venette, France

Francis Pardal