Patent ID: 8865834

Claim:
An adhesive polymer composition comprising a) 50%-95% by weight, of a polyethylene homo- and/or ethylene copolymer which is a copolymer of ethylene with C 3 -C 20 -alkene, which polyethylene has a molar mass distribution width M w /M n of from 6 to 30, a density of from 0.93 to 0.955 g/cm 3 , a weight average molar mass M w of from 20,000 g/mol to 500,000 g/mol, has from 0.01 to 20 CH 3 /1000 carbon atoms has a Mz from 200,000 to less than 1,000,000 g/mol, and has at least 0.6 vinyl groups/1000 carbon atoms; b) 5%-50% by weight, of a polar copolymer of ethylene with at least one comonomer which comonomer is selected from the group consisting of an acrylate and acrylic acid; and c) 1%-30% by weight, of a grafted polyethylene homo- and/or ethylene copolymer which is a copolymer of ethylene with C 3 -C 20 -alkene, which polyethylene has a molar mass distribution width M w /M n of from 6 to 30, a density of from 0.93 to 0.955 g/cm 3 , a weight average molar mass M w of from 20,000 g/mol to 500,000 g/mol, has from 0.01 to 20 CH 3 /1000 carbon atoms has a Mz from 200,000 to less than 1,000,000 g/mol, and has at least 0.6 vinyl groups/1000 carbon atoms, wherein the grafted polyethylene homo- and/or ethylene copolymer comprises polymer chains which have been grafted with 0.01% to 10% of ethylenically unsaturated dicarboxylic acids and/or dicarboxylic anhydrides, based on the total weight of the grafted polyethylene homo- and/or ethylene copolymer.