Patent ID: 7569281

Claim:
A flexible packaging laminate film comprising at least two polyolefin layers and at least one block copolymer layer, wherein said block copolymer comprises a selectively hydrogenated high vinyl block copolymer having at least one A 1 block and at least one B 1 block and having the general formula: A 1 -B 1 -A 1 ,(A 1 -B 1 ) n , (A 1 -B 1 ) n A 1 , or (A 1 -B 1 ) n X or mixtures thereof, wherein (1) each A 1 , prior to hydrogenation, is predominantly a polymerized monoalkenyl arene hydrocarbon block having a molecular weight of from 4,000 to 45,000; (2) each B 1 , prior to hydrogenation, is predominantly a polymerized conjugated diene hydrocarbon block selected from the group consisting of polybutadiene, polyisoprene, polypentadiene, polyhexadiene and mixtures thereof, having a molecular weight of from 20,000 to 300,000 when the block copolymer is sequential and from 10,000 to 150,000 when the block copolymer is coupled; (4) n has a value of 2 to 30 and X is a coupling agent residue; (5) the monoalkenyl arene content of the block copolymer is from 8 to 40 weight percent; (6) the vinyl content of the conjugated diene hydrocarbon block prior to hydrogenation is from 60 to 85 mol percent; (7) subsequent to hydrogenation less than 50 percent of the monoalkenyl aromatic double bonds have been hydrogenated and at least 80 percent of the conjugated diene double bonds have been hydrogenated; and (8) the melt index of the block copolymer is from 1 to 40 grams/10 minutes according to ASTM D1238 at 230° C. and 2,16 kg weight.