Patent ID: 6180731
Filing Date: 2001-01-30
Classification: C08F,Y10S

Abstract:
A polymer of ethylene obtained by polymerization of ethylene or ethylene and further comonomers in the presence of a catalyst system comprising as active constituentsI) a Phillips catalyst,II) a solid which is different from I) and comprises a silica gel support and a component which is derived from the metallocene complexes of the formula (A) in which the substituents and the indices have the following meanings: ##STR8##R.sup.1 to R.sup.10 are hydrogen, C.sub.1 -C.sub.10 -alkyl, 5- to 7-membered cycloalkyl which may in turn bear C.sub.1 -C.sub.6 -alkyl groups as substituents, C.sub.5 -C.sub.15 -aryl or arylalkyl, where two adjacent radicals may also together form a cyclic group having from 4 to 15 carbon atoms, or Si(R.sup.11).sub.3, whereR.sup.11 is C.sub.1 -C.sub.10 -alkyl, C.sub.6 -C.sub.15 -aryl or C.sub.3 -C.sub.10 -cycloalkyl, or the radicals R.sup.4 and R.sup.9 together form a group --[Y(R.sup.12 R.sup.13 ].sub.m --, whereY is silicon, germanium, tin or carbonR.sup.12, R.sup.13 are hydrogen, C.sub.1 -C.sub.10 -alkyl, C.sub.3 -C.sub.10 -cycloalkyl or C.sub.6 -C.sub.15 -arylM is a metal of transition groups IV to VIII or a metal of the lanthanide series,Z.sup.1, Z.sup.2 are fluorine, chlorine, bromine, iodine, hydrogen, C.sub.1 -C.sub.20 -alkyl or aryl, --OR.sup.14, --OOCR.sup.14, ##STR9##R.sup.14 is hydrogen or C.sub.1 -C.sub.20 -alkyl,R.sup.15 is C.sub.1 -C.sub.20 -alkyl,m 1, 2, 3 or 4n 0, 1 or 2r 0, 1 or 2,where the sum n+r is likewise 0, 1 or 2, and optionallyIII)an organometallic component selected from groups IA, IIA, IIB and IIIA of the Periodic Table of the Elements.