Catalytic solid for the (co)polymerization of ethylene, process for its preparation, and catalytic system for the (co)polymerization of ethylene

US6013595A · kind A · utility

Assignee

• SOLVAY (Société Anonyme) · BE

Inventors

• Olivier Lhost · Havré, BE
• Nicola Zandona · Waterloo, BE

Key dates

• Filing date: Feb 27, 1996
• Grant date: Jan 11, 2000
• Expiry date: Feb 27, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F4/63912
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A catalytic solid for (co)polymerization of ethylene, includes (a) at least one inorganic support; (b) at least one transition metal metallocene having a formula (C.sub.p).sub.a (C.sub.p ').sub.h MX.sub.x Z.sub.z, in which C.sub.p and C.sub.p each denote a cyclopentadienyl, indenyl, or fluorenyl radical or a substituted derivative of such a radical, coordinated to the central atom M, optionally the groups C.sub.p and C.sub.p are linked via a covalent bridge, M denotes the at lease one transition metal, which is selected from the group consisting of scandium, titanium, zirconium, hafnium and vanadium, a, b, x and z denote integers such that (a+b+x+z)=m, x>0, z.gtoreq.0 and a and/or b.noteq.0, m denotes the valency of the at least one transition metal M, X denotes a halogen, and Z denotes a hydrocarbon radical which may optionally comprise oxygen or a silyl radical of formula (--R.sub.1 --Si--R'R"R'") where R denotes an alkyl, alkenyl, aryl, alkoxy or cycloalkyl group comprising up to 20 carbon atoms, R', R", R'" are identical or different and each denote a halogen or an alkyl, alkenyl, aryl, alkoxy or cycloalkyl group comprising up to 20 carbon atoms, and t denotes 0 or 1; (c) at le…