公开(公告)号：US20210040245A1

公开(公告)日：2021-02-11

申请号：US16977599

申请日：2019-01-25

Applicant: TOHO TITANIUM CO., LTD.

Inventor： Toshiya Uozumi ,  Tetsuya Morioka ,  Keiichi Kurosaki ,  Teppei Ishikawa

IPC: C08F10/06 ,  C08F297/08

Abstract: Provided is a novel olefin polymer which is excellent in lightness and moldability, has high rigidity and yields molded products excellent in flexural elasticity. The olefin polymer includes a propylene initial polymerization product formed in the presence of an olefin polymerization catalyst which is a contact reaction product of an olefin polymerization solid catalyst component containing a titanium atom, a magnesium atom, a halogen atom and an internal electron donating compound, at least one organoaluminum compound selected from the compounds of the general formula (I), and a first external electron donating compound; and a polypropylene part formed of a propylene polymerization product formed in the presence of the olefin polymerization catalyst and a second external electron donating compound higher in adsorption to the surface of the olefin polymerization solid catalyst component than the first external electron donating compound.

公开(公告)号：US10479856B2

公开(公告)日：2019-11-19

申请号：US16213349

申请日：2018-12-07

Applicant: TOHO TITANIUM CO., LTD.

Inventor： Masafumi Imai ,  Toshihiko Sugano ,  Toshiya Uozumi ,  Yuta Haga

IPC: C08F297/06 ,  C08F4/654 ,  C08F297/08 ,  C08F210/06

Abstract: A method for producing a propylene-based block copolymer produces a propylene-based copolymer that exhibits excellent stereoregularity, rigidity, and impact resistance in a convenient and efficient manner while achieving high polymerization activity. The method for producing a propylene-based block copolymer includes bringing a catalyst into contact with propylene, or propylene and an α-olefin, and bringing an electron donor compound into contact with the resulting product to produce a propylene-based block copolymer, the catalyst including a solid catalyst component that includes titanium, magnesium, a halogen, and an internal electron donor compound, a specific organoaluminum compound, and a specific external electron donor compound.

公开(公告)号：US20170369608A1

公开(公告)日：2017-12-28

申请号：US15542723

申请日：2016-01-18

Applicant: TOHO TITANIUM CO., LTD.

Inventor： Hiroyuki Kono ,  Toshiya Uozumi ,  Shingo Yamada ,  Toshihiko Sugano

IPC: C08F110/06

CPC classification number: C08F110/06 ,  C08F4/654 ,  C08F10/00

Abstract: A method for producing an olefin polymerization catalyst includes bringing a solid catalyst component for olefin polymerization, a vinylsilane compound, an organosilicon compound, and an organoaluminum compound into contact with each other in an inert organic solvent under an inert gas atmosphere in the absence of a specific vinyl compound, wherein a washing treatment is not performed after the vinylsilane compound has been added to the reaction system, the solid catalyst component includes a magnesium compound, a titanium halide compound, and an electron donor compound that does not include a phthalic acid ester structure, and includes a diol skeleton, and the organosilicon compound does not include a vinyl group, and includes at least one group selected from an alkoxy group and an amino group.

公开(公告)号：US20170240682A1

公开(公告)日：2017-08-24

申请号：US15504482

申请日：2015-08-14

Applicant: TOHO TITANIUM CO., LTD.

Inventor： Masafumi Imai ,  Toshihiko Sugano ,  Toshiya Uozumi ,  Yuta Haga

IPC: C08F297/08

CPC classification number: C08F297/083 ,  C08F4/654 ,  C08F210/06 ,  C08F297/06 ,  C08F4/651 ,  C08F4/6492 ,  C08F4/6494 ,  C08F4/6465 ,  C08F4/6545 ,  C08F210/16 ,  C08F2/001

Abstract: A method for producing a propylene-based block copolymer produces a propylene-based copolymer that exhibits excellent stereoregularity, rigidity, and impact resistance in a convenient and efficient manner while achieving high polymerization activity. The method for producing a propylene-based block copolymer includes bringing a catalyst into contact with propylene, or propylene and an α-olefin, and bringing an electron donor compound into contact with the resulting product to produce a propylene-based block copolymer, the catalyst including a solid catalyst component that includes titanium, magnesium, a halogen, and an internal electron donor compound, a specific organoaluminum compound, and a specific external electron donor compound.