公开(公告)号：US20220119560A1

公开(公告)日：2022-04-21

申请号：US17500012

申请日：2021-10-13

申请人： SK Innovation Co., Ltd. ,  SK Geo Centric Co., Ltd.

发明人： Hyo Seung Park ,  Hyeong Min Kim ,  Sung Jae Na ,  Ji Hae Park ,  So Young Shim

IPC分类号： C08F110/06

摘要： Provided is a method of producing polypropylene. More specifically, provided is a method of efficiently producing high-strength isotactic polypropylene having high crystallinity even with a shorter polymerization time. More specifically, provided is a method of producing polypropylene, including polymerizing propylene in the presence of a catalyst composition including a Ziegler-Natta catalyst, an external electron donor, dialkylaluminum hydride, and trialkylaluminum. The polypropylene has a xylene cold soluble content of 3 wt % or less.

公开(公告)号：US11725069B2

公开(公告)日：2023-08-15

申请号：US17500012

申请日：2021-10-13

申请人： SK Innovation Co., Ltd. ,  SK Geo Centric Co., Ltd.

发明人： Hyo Seung Park ,  Hyeong Min Kim ,  Sung Jae Na ,  Ji Hae Park ,  So Young Shim

IPC分类号： C08F110/06 ,  C08F4/642 ,  C08F4/659

CPC分类号： C08F110/06

摘要： Provided is a method of producing polypropylene. More specifically, provided is a method of efficiently producing high-strength isotactic polypropylene having high crystallinity even with a shorter polymerization time. More specifically, provided is a method of producing polypropylene, including polymerizing propylene in the presence of a catalyst composition including a Ziegler-Natta catalyst, an external electron donor, dialkylaluminum hydride, and trialkylaluminum. The polypropylene has a xylene cold soluble content of 3 wt % or less.