公开(公告)号：US20240002560A1

公开(公告)日：2024-01-04

申请号：US18017439

申请日：2021-07-23

Applicant: BOREALIS AG

Inventor： Georgy KIPIANI ,  Jyrki KAUHANEN ,  Felice DE SANTIS ,  Marja MUSTONEN ,  Matthias HOFF ,  Kalin SIMEONOV ,  Kimmo HAKALA ,  Jarkko HASSINEN ,  Maria RANIERI ,  Esko SAIKKONEN ,  Tiina HÄMÄLÄINEN ,  Stefan POLLHAMMER ,  Pascal CASTRO ,  Irfan SAEED ,  Kalle KALLIO

IPC: C08F210/16

CPC classification number: C08F210/16 ,  C08F2420/07

Abstract: The invention provides a process for the preparation of a multimodal ethylene polymer in a multistage process in the presence of a catalyst comprising a complex of formula (lx) wherein each X is a sigma donor ligand; each Het is independently a monocyclic or multicyclic heteroaromatic or heterocyclic group containing at least one heteroatom selected from O, N or S; L is a carbon, silicon or germanium based divalent bridge in which one or two backbone atoms link the ligands; M is Ti, Zr or Hf; each R1 is the same or different and is a linear CMO alkyl group, or linear CHO alkoxy, each n is 0 to 3; each R2 is the same or different and is a C1-10 alkyl group, C1-10 alkoxy group or —Si(R)3 group; each R is the same or different and is C1-10 alkyl or phenyl group optionally substituted by 1 to 3 C1-6 alkyl groups; and eachp is 0 to 3;

公开(公告)号：US20210095057A1

公开(公告)日：2021-04-01

申请号：US16499514

申请日：2018-03-28

Applicant: BOREALIS AG

Inventor： Luigi Maria Cristoforo RESCONI ,  Noureddine AJELLAL ,  Anna FAIT ,  Irfan SAEED ,  Maria RANIERI ,  David QUIN ,  Vyatcheslav V. IZMER ,  Dmitry S. KONONOVICH ,  Oleg SAMSONOV ,  Alexander Z. VOSKOBOYNIKOV

IPC: C08F4/6592 ,  C08F4/642 ,  C08F210/16

Abstract: Catalyst system, the catalyst system comprising (i) at least one metallocene complex of formula (I) wherein Mt1 is Hf, X is a sigma-donor ligand, R1, R2, R3 are the same or different from each other and can be hydrogen or a saturated linear or branched C1-C10 alkyl, whereby the alkyl group can optionally contain up to 2 heteroatoms belonging to groups 14-16 of the periodic table, or R1 and R2 or R2 and R3 can form a ring having 4 to 6 C-atoms and 1 to 3 double bonds, R4 and R5 are the same or different from each other and can be saturated linear or branched C1-C10 alkyl, C5-C10 aryl, C6-C20 alkylaryl or C6-C20 arylalkyl groups, which can optionally contain up to 2 heteroatoms belonging to groups 14-16 of the periodic table, n can be 1 to 5, Ar is a C6-C20-aryl or -heteroaryl group, which can be unsubstituted or substituted by 1 to 5 linear or branched C1-C10 alkyl group(s), and (ii) an aluminoxane cocatalyst and (iii) optionally an aluminium alkyl compound AI(R7)3, with R7 being a linear or branched C2-C8-alkyl group.