The present invention relates to an ethylene-based copolymer useful as a modifier for resins, e.g., polypropylene, and an ethylene/α-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 α-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 α-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.
本发明涉及一种可用作
树脂(如聚
丙烯)改性剂的
乙烯基共聚物,以及一种含有相同
乙烯基共聚物的
乙烯/α-烯烃共聚物组合物。
本发明的
乙烯基共聚物[I]的特征是:
(a-1) 用差示扫描量热仪(
DSC)测得的内热曲线最大峰值处的温度(Tm)为 40 至 90℃、
(a-2) 所含成分在常温下可溶于
癸烷,溶解度为 1%至 70%(按重量计),以及
(a-3) 含有在常温下可溶于
癸烷的组分,该组分包括(i) 源自
乙烯的循环单元和(ii) 源自 4 个或更多碳原子的 α-烯烃的循环单元,以及
其中(i) 由
乙烯衍生的递归单元的含量为 50%至 75%(以摩尔计)。本发明的
乙烯基共聚物组合物[II]的特点是含有满足以下条件(b-1)至(b-3)的
乙烯基共聚物:
(b-1) 用差示扫描量热仪(
DSC)测量,溶于
癸烷的组分在 64℃时的内热曲线最大峰值处的温度(Tm)为 40 至 90℃、
(b-2) 含有在 64℃时可溶于
癸烷的组分,其中含有在常温下可溶于
癸烷的组分的重量比为 1%至 70%,以及
(b-3) 含有在常温下可溶于
癸烷的组分,该组分包括(i) 源自
乙烯的循环单元和(ii) 源自 4 个或更多碳原子的 α-烯烃的循环单元,以及
其中(i) 由
乙烯衍生的递归单元的含量为 50%至 75%(以摩尔计)。