公开(公告)号：US20240294682A1

公开(公告)日：2024-09-05

申请号：US18573575

申请日：2022-06-23

Applicant: BOREALIS AG

Inventor： Pascal CASTRO ,  Vasileios KANELLOPOULOS ,  Georgy KIPIANI ,  Marja MUSTONEN ,  Irfan SAEED

IPC: C08F210/16 ,  C08F2/00 ,  C08F2/34 ,  C08F4/659 ,  C08F4/6592

CPC classification number: C08F210/16 ,  C08F2/001 ,  C08F2/34 ,  C08F4/65912 ,  C08F4/65916 ,  C08F4/65927 ,  C08F2420/07

Abstract: The disclosure relates to a process for polymerising olefins, the process comprising polymerising ethylene, optionally in the presence of at least one other alpha olefin comonomer, preferably C4-C10 alpha olefin comonomer, preferably in multi stage polymerisation process configuration, in the presence of a single-site polymerisation catalyst to produce a polymer component to produce a polyethylene polymer or a polyethylene copolymer, wherein the single-site polymerisation catalyst comprises (i) a transition metal complex; (ii) a cocatalyst; and optionally (iii) a support; and is characterised by a (Weibull modulus)×(scale parameter) product equal to or higher than 40 MPa and a (Weibull modulus)/(scale parameter) ratio equal to or lower than 0.50 MPa−1 wherein the Weibull modulus and the scale parameter are determined by the Weibull analysis of the compressive strength of the catalyst particles. The disclosure further relates to a single-site polymerisation catalyst, comprising (i) a transition metal complex; (ii) a cocatalyst; and optionally (iii) a support, preferably a silica support; wherein the single-site polymerisation catalyst is characterised by a (Weibull modulus)×(scale parameter) product equal to or higher than 40 MPa and a (Weibull modulus)/(scale parameter) ratio equal to or lower than 0.50 MPa−1 wherein the Weibull modulus and the scale parameter are determined by the Weibull analysis of the compressive strength of the catalyst particles. The disclosure further relates to use of the single-site polymerisation catalyst in the preparation of a polyethylene polymer component, a polyethylene polymer, or a polyethylene copolymer.

公开(公告)号：US20220220231A1

公开(公告)日：2022-07-14

申请号：US17614744

申请日：2020-05-20

Applicant: BOREALIS AG

Inventor： Luigi Maria Cristoforo RESCONI ,  Wilfried TOELTSCH ,  Ville VIRKKUNEN ,  Kalle KALLIO ,  Soile LUSTIG ,  Noureddine AJELLAL ,  Marja MUSTONEN ,  Alexander REZNICHENKO

IPC: C08F4/6592 ,  C08F4/649 ,  C08F4/659 ,  C08F10/06

Abstract: New, improved silica supported catalyst system, which comprises a specific class of metallocene complexes in combination with a boron containing cocatalyst and an aluminoxane cocatalyst, its use for producing propylene homopolymers, propylene copolymers, especially with ethylene, as well as heterophasic propylene copolymers, preferably in a multistep process including a gas phase polymerization step.

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;