NOVEL ETHYLENE COPOLYMER AND USES THEREOF

The ethylene copolymer of the invention is a copolymer (A-1) of ethylene and an alpha -olefin of 3 to 20 carbon atoms and has the following properties: (a) the melt index (MI2) at 190 DEG 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 , (c) the relationship between a vinyl group amount and MI2 of the polymer satisfies the following expression (c) : (vinyl group amount : number of vinyl groups/1000 carbon atoms) ≤ 0.018038+0.003259xlog(MI2) and (d) the relationship between a vinylidene group amount and MI2 of the polymer satisfies the following expression (d) : (vinylidene group amount: number of vinylidene groups/1000 carbon atoms) ≤ 0.018038+0.003259xlog(MI2) The ethylene copolymer has a melt index, a density, a vinyl group amount and a vinylidene group amount in the specific ranges, and hence the copolymer is excellent in mechanical properties, molding processability, heat stability in the molding process and heat aging resistance.. The ethylene copolymer of the invention can be used for various molded products, particularly films and sheets, resin modifiers, and elastomeric products.