Patent ID: 6342463
Filing Date: 2002-01-29
Classification: C08F

Abstract:
A complex having a reactivity at temperatures of greater than 80Â° C. to produce ethylene polymers comprising a Group 4 metal complex of the formula: wherein M is selected from the group consisting of Ti, Zr, and Hf; n is 1 or 2; Cp is a monocyclopentadienyl ligand which is unsubstituted or substituted by up to five substituents independently selected from the group consisting of a C1-10 hydrocarbyl radicals or two hydrocarbyl radicals taken together may form a ring which hydrocarbyl substituents or cyclopentadienyl radical are unsubstituted or further substituted by a halogen atom, a C1-8 alkyl radical, C1-8 alkoxy radical, a C6-10 aryl or aryloxy radical; an amido radical which is unsubstituted or substituted by up to two C1-8 alkyl radicals; a phosphido radical which is unsubstituted or substituted by up to two C1-8 alkyl radicals; silyl radicals of the formula â€”Siâ€”(R2)3 wherein each R2 is independently selected from the group consisting of hydrogen, a C1-8 alkyl or alkoxy radical, C6-10 aryl or aryloxy radicals; germanyl radicals of the formula Geâ€”(R2)3 wherein R2 is as defined above; each R1 is independently selected from the group consisting of a hydrogen atom, a halogen atom, C1-10 hydrocarbyl radicals which are unsubstituted by or further substituted by a halogen atom, a C1-8 alkyl radical, C1-8 alkoxy radical, a C6-10 aryl or aryloxy radical, a silyl radical of the formula â€”Siâ€”(R2)3 wherein each R2 is independently selected from the group consisting of hydrogen, a C1-8 alkyl or alkoxy radical, C6-10 aryl or aryloxy radicals, germanyl radical of the formula Geâ€”(R2)3 wherein R2 is as defined above or two R1 radicals taken together may form a bidentate C1-10 hydrocarbyl radical, which is unsubstituted by or further substituted by a halogen atom, a C1-8 alkyl radical, C1-8 alkoxy radical, a C6-10 aryl or aryloxy radical, a silyl radical of the formula â€”Siâ€”(R2)3 wherein each R2 is independently selected from the group consisting of hydrogen, a C1-8 alkyl or alkoxy radical, C6-10 aryl or aryloxy radicals, germanyl radicals of the formula Geâ€”(R2)3 wherein R2 is as defined above, provided that R1 individually or two R1 radicals taken together may not form a Cp ligand as defined above; each L1 is independently selected from the group consisting of a hydrogen atom, of a halogen atom, a C1-10 hydrocarbyl radical a C1-10 alkoxy radical, a C5-10 aryl oxide radical, each of which said hydrocarbyl, alkoxy, and aryl oxide radicals may be unsubstituted by or further substituted by a halogen atom, a C1-8 alkyl radical, C1-8 alkoxy radical, a C6-10 aryl or aryl oxy radical, an amido radical which is unsubstituted or substituted by up to two C1-8 alkyl radicals; a phosphido radical which is unsubstituted or substituted by up to two C1-8 alkyl radicals, provided that L1 may not be a Cp radical as defined above; and an activator.