| 摘要 |
PURPOSE: A metallocene catalyst system(MCS), its preparation method, a preparation method of a polyolefin using the catalyst system and a polyolefin prepared by the method are provided, to improve catalytic activity. CONSTITUTION: The metallocene catalyst system(100) comprises a support(105) and a metallocene(120) substantially bound through the support, wherein the metallocene catalyst system has a catalytic activity of at least 10,400 g propylene/g MCS/hr when exposed to the reaction condition of about 300-400 g of propylene per 1 L of a reactor in a 4 L reactor, 23 ppm based on the weight of the system, 37 ppm based on H2 weight and about 46 ppm triethylaluminum, a temperature of about 67 deg.C and a reaction time of 1 hour. Also the MCS comprises a catalyst support system containing a support having an average pore diameter greater than about 140 Angstrom; and metallocene substantially bound through the support. |
