Title:
IMPROVED CATALYST SYSTEM FOR PRODUCING POLYETHYLENE COPOLYMERS IN A HIGH TEMPERATURE SOLUTION POLYMERIZATION PROCESS
Document Type and Number:
WIPO Patent Application WO/2015/158790
Kind Code:
A3
Abstract:
Catalyst system for producing ethylene copolymers in a high temperature solution process, the catalyst system comprising (i) a metallocene complex of formula (I) wherein M is Hf or Zr X is a sigma ligand, L is a bridge of the formula -SiR8
2-, wherein each R8 is independently a C1-C20-hydrocarbyl, tri(C1-C20-alkyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl n is 0, 1 or 2 R1 and R1' are the same or can be different and can be a linear or branched C1-C6-alkyl group, R2 and R2' are the same or are different and are a CH2-R9 group, with R9 being H or linear or branched C1-C6-alkyl group R5 and R5' are the same or are different and can be H or a linear or branched C1-C6-alkyl group or a OR group, wherein R is a C1-C6-alkyl group R6 and R6' are the same or are different and can be H or a C(R10)3 group, with R10 being the same or different and R10 can be H or a linear or branched C1-C6-alkyl group or R5 and R6 and/or R5' and R6' taken together form an unsubstituted 4-7 membered ring condensed to the benzene ring of the indenyl moiety, with the proviso that if R5 and R6 as well as R5' and R6' taken together form an unsubstituted 5 membered ring condensed to the benzene ring of the indenyl moiety then R2 and R2' are not a C1-alkyl group; and R7 and R7' can be the same or are different and can be H or a linear or branched C1-C6-alkyl group (ii) an aluminoxane cocatalyst and (iii) optionally a boron containing cocatalyst
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Inventors:
AJELLAL NOUREDDINE (FI)
PELLECCHIA ROBERTA (AT)
RESCONI LUIGI (IT)
IZMER VYATCHESLAV V (RU)
KONONOVICH DMITRY S (RU)
VOSKOBOYNIKOV ALEXANDER Z (RU)
PELLECCHIA ROBERTA (AT)
RESCONI LUIGI (IT)
IZMER VYATCHESLAV V (RU)
KONONOVICH DMITRY S (RU)
VOSKOBOYNIKOV ALEXANDER Z (RU)
Application Number:
PCT/EP2015/058204
Publication Date:
January 28, 2016
Filing Date:
April 15, 2015
Export Citation:
Assignee:
BOREALIS AG (AT)
International Classes:
C08F4/659; C08F210/16
Domestic Patent References:
WO2000009515A1 | 2000-02-24 | |||
WO1997014727A1 | 1997-04-24 | |||
WO2007116034A1 | 2007-10-18 |
Other References:
DATABASE CA [online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; CHUKANOVA, O. M. ET AL: "Polymerization of propylene using isospecific rac-Me2Si(2-Me,4-PhInd)2ZrCl2 catalyst immobilized on polyethylene with grafted poly(acrylic acid)", XP002729674, retrieved from STN Database accession no. 2001:779046
WANG W-J ET AL: "LONG CHAIN BRANCHING IN ETHYLENE POLYMERIZATION USING CONSTRAINED GEOMETRY METALLOCENE CATALYST", MACROMOLECULAR CHEMISTRY AND PHYSICS, WILEY-VCH VERLAG, WEINHEIM, DE, vol. 199, no. 11, 1 November 1998 (1998-11-01), pages 2409 - 2416, XP000802214, ISSN: 1022-1352
WANG W-J ET AL: "LONG CHAIN BRANCHING IN ETHYLENE POLYMERIZATION USING CONSTRAINED GEOMETRY METALLOCENE CATALYST", MACROMOLECULAR CHEMISTRY AND PHYSICS, WILEY-VCH VERLAG, WEINHEIM, DE, vol. 199, no. 11, 1 November 1998 (1998-11-01), pages 2409 - 2416, XP000802214, ISSN: 1022-1352
Attorney, Agent or Firm:
CAMPBELL, Neil (St Bride's House10 Salisbury Square, London EC4Y 8JD, GB)
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