Repsol Quimica, S.a.

Ernesto Carmona Guzman

Luis Mendez Llatas

Antonio Mu&ntilde;oz-Escalona Lafuente

Juan Perez

Manuel Lopez Reyes

The present invention relates to a bidenitate diimino-complex of nickel or palladium containing at least one group OSi(R) wherein each R, equal to or different from each other, is selected from the group consisting of: C -C alkyl, C -C cycloalkyl, C -C aryl, C -C alkenyl, C -C arylalkyl, C -C alkylaryl, C -C arylalkenyl, and C -C alkenylaryl, linear or branched, preferably each R is independently methyl, ethyl or propyl. The present invention also relates to the process for the preparation of bidentate diimino complexes of nickel and palladium as well as the process for their use in olefin polymerization.

Bidentate diimine nickel and palladium complexes and polymerization catalysts obtained therefrom

The present invention is related to diimino compounds of formulae (I) R &mdash;N&boxH;C(R )(R ) C(R )&boxH;N&mdash;R and (II) (R ) C&boxH;N&mdash;(CR ) &mdash;N&boxH;C(R ) functionalized with at least one siloxy group. Said diimino compounds are useful for obtaining a solid catalyst component for polymerizing olefins wherein the diimino compound of formulae (I) or (II) is bonded to a porous inorganic support and to a transition metal selected from groups 8, 9 and 10 of the periodic table. This invention also relates to a process for preparing said diimino compounds of formulae (I) or (II), to a process for obtaining said solid catalyst component comprising the combination of the diimino compound and a porous inorganic support. Further, the invention also relates to the use of said solid catalyst in combination with a cocatalyst to polirnenrze olefins.

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Sevilla, Spain

Ernesto Carmona Guzman