09-02-2017 дата публикации
Номер: US20170037164A1
Принадлежит:
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 X is a sigma ligand, L is a bridge of the formula —SiR—, wherein each Ris independently a C-C-hydrocarbyl, tri(C-C-alkyl)silyl, C-C-aryl, C-C-arylalkyl or C-C-alkylaryl n is 0, 1 or 2 Rand R are the same or can be different and can be a linear or branched C-C-alkyl group, Rand R are the same or are different and are a CH—Rgroup, with Rbeing H or linear or branched C-C-alkyl group Rand R are the same or are different and can be H or a linear or branched C-C-alkyl group or a OR group, wherein R is a C-C-alkyl group Rand R are the same or are different and can be H or a C(R)group, with Rbeing the same or different and Rcan be H or a linear or branched C-C-alkyl group or Rand Rand/or R and R taken together form an unsubstituted 4-7 membered ring condensed to the benzene ring of the indenyl moiety, and Rand R can be the same or are different and can be H or a linear or branched C-C-alkyl group (ii) an aluminoxane cocatalyst and/or (iii) a boron containing cocatalyst and (iv) optionally an aluminium alkyl compound. 2. Catalyst system according to claim 1 , wherein in the formula (I)M is Hf,{'sup': 11', '11', '11', '11', '11', '11', '11', '11', '11', '11, 'sub': 2', '3', '2', '2', '1', '20', '2', '20', '2', '20', '6', '20', '7', '20', '7', '20', '3', '2', '2, 'X which may be the same or different, and is a hydrogen atom, a halogen atom, a R, OR, OSOCF, OCOR, SR, NRor PRgroup, wherein Ris a linear or branched, cyclic or acyclic, C-C-alkyl, C-C-alkenyl, C-C-alkynyl, C-C-aryl, C-C-alkylaryl or C-C-arylalkyl radical; optionally containing heteroatoms belonging to groups 14-16 or is SiR, SiHRor SiHR,'}{'sup': 8', '8, 'sub': 2', '1', '10', '6', '10, 'L is a bridge of the formula —SiR—, wherein both Rare the same C-C-hydrocarbyl or C-C-aryl group,'}{'sup': 1', '1′, 'sub': 1', '6, 'Rand R are the same and ...
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