Patent ID: 7125929

Claim:
A tie-layer adhesive composition comprising: (a) 95.5 to 99.5 weight percent, based on the weight of the composition, ethylene-C 4-8 α-olefin copolymer base resin having hard and soft phases that form a network structure, density of 0.925 g/cm 3 or less, melt index from 0.3 to 5 g/10 min and which, when in the pelletized form, exhibits a reduction in ER of 10 percent or more to a final ER value of 1.0 or less upon rheometric low shear modification or solution dissolution, and (b) 0.5 to 4.5 weight percent, based on the weight of the composition, modified polyolefin which is an ethylene-C 3-8 α-olefin copolymer having a density of 0.905 to 0.965 g/cm 3 grafted with 0.5 to 2.5 weight percent ethylenically unsaturated carboxylic acid or ethylenically unsaturated carboxylic acid derivative.