Patent ID: 6063879
Filing Date: 2000-05-16
Classification: C08F

Abstract:
A solution process for the polymerization of ethylene and optionally one or more aliphatic or aromatic hydrocarbyl C.sub.2-20 mono- or diolefins at a temperature from 80.degree. C. to 250.degree. C. at pressures up to 15,000 psig, in the presence of a precursor comprising a Group 4 metal complex of the formula: ##STR5## 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 C.sub.1-10 hydrocarbyl radicals or two hydrocarbyl radicals taken together may form a ring which hydrocarbyl substituents or ring are unsubstituted or further substituted by a halogen atom, a C.sub.1-8 alkyl radical, C.sub.1-8 alkoxy radical, a C.sub.6-10 aryl or aryloxy radical; an amido radical which is unsubstituted or substituted by up to two C.sub.1-8 alkyl radicals; a phosphido radical which is unsubstituted or substituted by up to two C.sub.1-8 alkyl radicals; silyl radicals of the formula --Si--(R.sup.2).sub.3 wherein each R.sup.2 is independently selected from the group consisting of hydrogen, a C.sub.1-8 alkyl or alkoxy radical, C.sub.6-10 aryl or aryloxy radicals; germanyl radicals of the formula Ge--(R.sup.2).sub.3 wherein R.sup.2 is as defined above; each R.sup.1 is independently selected from the group consisting of a hydrogen atom, a halogen atom, C.sub.1-10 hydrocarbyl radicals which are unsubstituted by or further substituted by a halogen atom, a C.sub.1-8 alkyl radical, C.sub.1-8 alkoxy radical, a C.sub.6-10 aryl or aryloxy radical, a silyl radical of the formula --Si--(R.sup.2).sub.3 wherein each R.sup.2 is independently selected from the group consisting of hydrogen, a C.sub.1-8 alkyl or alkoxy radical, C.sub.6-10 aryl or aryloxy radicals, germanyl radical of the formula Ge--(R.sup.2).sub.3 wherein R.sup.2 is as defined above or two R.sup.1 radicals taken together may form a bidentate C.sub.1-10 hydrocarbyl radical, which is unsubstituted by or further substituted by a halogen atom, a C.sub.1-8 alkyl radical, C.sub.1-8 alkoxy radical, a C.sub.6-10 aryl or aryloxy radical, a silyl radical of the formula --Si--(R.sup.2).sub.3 wherein each R.sup.2 is independently selected from the group consisting of hydrogen, a C.sub.1-8 alkyl or alkoxy radical, C.sub.6-10 aryl or aryloxy radicals, germanyl radicals of the formula Ge--(R.sup.2).sub.3 wherein R.sup.2 is as defined above, provided that R.sub.1 individually or two R.sub.1 radicals taken together may not form a Cp ligand as defined above; each L.sup.1 is independently selected from the group consisting of a hydrogen atom, of a halogen atom, a C.sub.1-10 hydrocarbyl radical a C.sub.1-10 alkoxy radical, a C.sub.5-10 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 C.sub.1-8 alkyl radical,C.sub.1-8 alkoxy radical, a C.sub.6-10 aryl or aryl oxy radical, an amido radical which is unsubstituted or substituted by up to two C.sub.1-8 alkyl radicals; a phosphido radical which is unsubstituted or substituted by up to two C.sub.1-8 alkyl radicals, provided that L.sup.1 may not be a Cp radical as defined above; and an activator.