Modified polysiloxane catalysts and a method of using the same

C - Chemistry – Metallurgy – 08 – F

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C08F 4/60 (2006.01) C08F 4/02 (2006.01) C08F 4/52 (2006.01) C08F 4/605 (2006.01) C08F 4/616 (2006.01) C08F 10/00 (2006.01)

Patent

CA 2261822

Catalysts for the polymerization of olefins contain units of formula (I) wherein: each R is independently selected from a C1 to C10 aliphatic or cycloaliphatic group or a C6 to C18 aryl, aralkyl, or alkaryl; each R2 is independently selected from hydride, R, and Q radicals wherein at least one R2 is Q; Q has the general formula: LMpL'rXp-r-1, wherein L is a monoanionic aromatic ancillary ligand pi-bonded to M and covalently bonded to Si; L' is a monoanionic aromatic ancillary ligand pi-bondned to M and optionally bonded to L through a covalent bridging group; M is a metal selected from Groups 3-10 of the Periodic Table or lanthanides; X is independently selected from a hydride radical, halide radical, hydrocarbyl radical, halocarbyl radical, silahydrocarbyl, alkoxy radical, aryloxy radical, alkylsulfonate radical, arylesulfonate radical or (R)2N- radical; or two X groups are joined with M to form a metallacycle, silametallacycle or pi-diene metallacycle moiety; p is the valence of M; r is 0 or 1; and n is an integer between about 10 and about 500.

Catalyseurs pour la polymérisation des oléfines, qui contiennent des unités de formule (I) dans laquelle chaque R est indépendamment choisi parmi un groupe aliphatique ou cycloaliphatique C¿1? à C¿10? ou un aryle, aralkyle ou alkaryle C¿6? à C¿18?; chaque R?2¿ est indépendamment choisi parmi hydrure, R et des radicaux Q, au moins un R?2¿ étant Q; Q est de formule générale LM?p¿L'¿r?X¿p-r-1? dans laquelle L est un ligand auxiliaire aromatique monoanionique rattaché à M par liaison pi et lié à Si de manière covalente; L' est un ligand auxiliaire aromatique monoanionique rattaché à M par liaison pi et éventuellement lié à L par un groupe covalent formant des ponts; M est un métal choisi dans les groupes 3 à 10 de la table périodique des éléments ou les lanthanides; X est indépendamment choisi parmi un radical hydrure, un radical halogénure, un radical hydrocarbyl, un radical halocarbyl, un radical silahydrocarbyl, un radical alcoxy, un radical aryloxy, un radical alkylsulfonate, un radical arylsulfonate ou un radical (R)¿2?N-; ou bien deux groupes X sont joints à M pour former une fraction métallacycle, silamétallacycle ou pi-diène métallacycle; p est la valence de M; r est 0 ou 1 et n est un nombre entier valant entre environ 10 et environ 500.

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