Abstract: The invention concerns a coextrusion binder comprising a mixture of at least one ethylene homo- or copolymer (A1) of density ranging between 0.940 and 0.980 g/cm3 with at least one propylene homo- or copolymer (B), said mixture being grafted by at least one functional monomer and optionally diluted in at least one non-grafted ethylene homo- or copolymer (A2) of density ranging between 0.940 and 0.980 g/cm3, the grafting rate of said coextrusion binder being less than 0.5 wt. % based on the total weight of said binder; the density of said binder ranging between 0.940 and 0.980 g/cm3. The invention also concerns a structure comprising said type of binder as well as its use.

Abstract: The invention relates to a tie comprising a blend of grafted polyethylene (PE), of grafted or ungrafted high-impact or crystal polystyrene and optionally of ungrafted PE. The grafted PE is preferably composed of two different cografted PEs. This tie is of use in the manufacture of multilayer structures intended for the field of Civil Engineering Works (CEW), more particularly for the fields of aluminium panels, of multilayer pipes, but also for the field of packaging.