| 摘要 |
The present invention relates to an ethylene-based copolymer useful as a modifier for resins, e.g., polypropylene, and an ethylene/alpha-olefin copolymer composition containing the same ethylene-based copolymer. The ethylene-based copolymer [I] of the present invention is characterized by: (a-1) having temperature (Tm) at the maximum peak in the endothermic curve, measured by a differential scanning calorimeter (DSC), of 40 to 90° C., (a-2) containing the component soluble in decane at normal temperature at 1 to 70% by weight, and (a-3) containing the component soluble in decane at normal temperature which comprises (i) a recurring unit derived from ethylene and (ii) a recurring unit derived from an alpha-olefin of 4 or more carbon atoms, and in which a content of (i) the recurring unit derived from ethylene is 50 to 75% by mole. The ethylene-based copolymer composition [II] of the present invention is characterized by containing the ethylene-based copolymer which satisfies the following conditions (b-1) to (b-3): (b-1) having temperature (Tm) at the maximum peak in the endothermic curve of the component soluble in decane at 64° C., measured by a differential scanning calorimeter (DSC), of 40 to 90° C., (b-2) containing the component soluble in decane at 64° C. which contains the component soluble in decane at normal temperature at 1 to 70% by weight, and (b-3) containing the component soluble in decane at normal temperature which comprises (i) a recurring unit derived from ethylene and (ii) a recurring unit derived from an alpha-olefin of 4 or more carbon atoms, and in which a content of (i) the recurring unit derived from ethylene is 50 to 75% by mole.
|
