公开(公告)号：US20160176997A1

公开(公告)日：2016-06-23

申请号：US14906627

申请日：2014-07-22

Applicant: BOREALIS AG

Inventor： Luigi Resconi ,  Wilfried Töltsch ,  Wang Jingbo

IPC: C08F210/16

CPC classification number: C08F210/16 ,  C08F4/65908 ,  C08F4/65912 ,  C08F210/06 ,  C08F2410/01 ,  C08F2/001 ,  C08F2500/12 ,  C08F2500/17 ,  C08F2500/18 ,  C08F10/00 ,  C08F4/65927

Abstract: A process for the preparation of a propylene copolymer, preferably a heterophasic propylene copolymer, in a multistage polymerisation process in the presence of a single site catalyst, said process comprising: (I) in a slurry polymerisation step, polymerising propylene and optionally at least one C2-10 alpha olefin comonomer; and subsequently (II) in a gas polymerisation step polymerising propylene and optionally at least one C2-10 alpha olefin comonomer, in the presence of catalyst and polymer from step (I); (III) in a second gas polymerisation step, polymerising propylene and at least one C2-10 alpha olefin comonomer in the presence of the catalyst and polymer from step (II); wherein said catalyst comprises (i) a metallocene complex of a group (IV) metal, said metallocene comprising at least two cyclopentadienyl type ligands; (ii) a boron based cocatalyst; and (iii) an aluminoxane cocatalyst; said catalyst being in solid form, preferably in solid particulate form, and being free from an external carrier.

Abstract translation: 一种在单段聚合方法中在单段聚合方法中制备丙烯共聚物，优选多相丙烯共聚物的方法，所述方法包括：（I）在淤浆聚合步骤中，聚合丙烯和任选的至少一种 C2-10α-烯烃共聚单体; 和随后（II）在气相聚合步骤中在步骤（I）的催化剂和聚合物存在下聚合丙烯和任选的至少一种C 2-10α-烯烃共聚单体; （III）在第二气体聚合步骤中，在催化剂和来自步骤（II）的聚合物的存在下聚合丙烯和至少一种C 2-10α-烯烃共聚单体; 其中所述催化剂包含（i）金属Ⅳ族金属茂金属络合物，所述金属茂包含至少两个环戊二烯基型配体; （ii）硼基助催化剂; 和（iii）铝氧烷助催化剂; 所述催化剂为固体形式，优选为固体颗粒形式，并且不含外部载体。

公开(公告)号：US09701772B2

公开(公告)日：2017-07-11

申请号：US14906627

申请日：2014-07-22

Applicant: BOREALIS AG

Inventor： Luigi Resconi ,  Wilfried Töltsch ,  Wang Jingbo

IPC: C08F210/16 ,  C08F210/06 ,  C08F2/12 ,  C08F2/34 ,  C08F4/643 ,  C08F4/645 ,  C08F4/659 ,  C08F2/38

CPC classification number: C08F210/16 ,  C08F4/65908 ,  C08F4/65912 ,  C08F210/06 ,  C08F2410/01 ,  C08F2/001 ,  C08F2500/12 ,  C08F2500/17 ,  C08F2500/18 ,  C08F10/00 ,  C08F4/65927

Abstract: A process for the preparation of a propylene copolymer, preferably a heterophasic propylene copolymer, in a multistage polymerisation process in the presence of a single site catalyst, said process comprising: (I) in a slurry polymerisation step, polymerising propylene and optionally at least one C2-10 alpha olefin comonomer; and subsequently (II) in a gas polymerisation step polymerising propylene and optionally at least one C2-10 alpha olefin comonomer, in the presence of catalyst and polymer from step (I); (III) in a second gas polymerisation step, polymerising propylene and at least one C2-10 alpha olefin comonomer in the presence of the catalyst and polymer from step (II); wherein said catalyst comprises (i) a metallocene complex of a group (IV) metal, said metallocene comprising at least two cyclopentadienyl type ligands; (ii) a boron based cocatalyst; and (iii) an aluminoxane cocatalyst; said catalyst being in solid form, preferably in solid particulate form, and being free from an external carrier.