Patent ID: 7074492

Claim:
A coextrusion tie composition comprising: 10 to 35 weight % of a polymer (A) comprising a blend of 80 to 20 weight % of a metallocene polyethylene (A1) with a density of between 0.865 g/cm 3 and 0.915 g/cm 3 and of 20 to 80 weight % of a non-metallocene linear low density polyethylene (LLDPE) (A2), the blend of polymers (A1) and (A2) being cografted by a grafting monomer selected from unsaturated carboxylic acids and their derivatives, said blend comprising between 30 and 100,000 ppm of said grafting monomer; 40 to 60 weight % of a styrene/butadiene/styrene block copolymer (B) with 50 to 90 mol % of styrene, 20 to 35 weight % of PE (C); the total of (A), (B), and (C) making 100%, the blend of (A), (B) and (C) being such that the MFI or melt flow index (ASTM D 1238, 190Â° C., 2.16 kg) is between 0.1 and 10 g/10 mm.