Patent ID: 6891018

Claim:
An ethylene copolymer which is a copolymer of ethylene and an α-olefin of 3 to 20 carbon atoms and has the following properties: (a) the melt index (MI2) at 190° C. under a load of 2.16 kg is in the range of 0.0001 to 1000 g/10 min, (b) the density is not more than 0.899 g/cm 3 , (c) the relationship between a vinyl group amount and MI2 of the polymer satisfies the following expressions: (vinyl group amount: number of vinyl groups/1000 carbon atoms)≦0.004509+0.000815×log (MI2), and (d) the relationship between a vinylidene group amount and MI2 of the polymer satisfies the following expressions: (vinylidene group amount: number of vinylidene groups/1000 carbon atoms)≦0.013528+0.002445×log (MI2).