摘要:
A catalyst system suitable for the polymerization of C.sub.2 -C.sub.10 -alk-1-enes comprising, as active ingredients, a complex compound of metals in Sub-groups IV and V of the Periodic Table and an oligomeric alumoxan compound is obtained by a procedure in which metals in Sub-groups IV and V of the Periodic Table are mixed with the oligomeric alumoxan compound and the resulting mixture is then applied to finely divided polymer. The catalyst system of the invention can be isolated after manufacture and is particularly suitable for the gas-phase polymerization of C.sub.2 -C.sub.10 -alk-1-enes.
摘要:
Propylene polymers have a molecular weight ratio Q (M.sub.w /M.sub.n) of from 6 to 30 and are obtainable by Ziegler-Natta polymerization in the presence of hydrogen as molecular weight regulator and are particularly suitable for the production of films and moldings.
摘要:
Metallocene catalyst systems for the polymerization of C.sub.2 -C.sub.10 -alkenes are obtainable by deactivation of a preactivated metallocene catalyst system which contains, as active components, a metallocene complex of a metal of subgroup IV or V of the Periodic Table and an oligomeric alumoxane compound and, if required, subsequent reactivation.
摘要:
Catalyst systems for the polymerization of C.sub.2 -C.sub.10 -alk-1-enes contain, as active components,a) a metallocene complex of the general formula I ##STR1## where M is a metal of subgroup III, IV or V of the Periodic Table of Elements or a metal of the lanthanide group,X is halogen, hydrogen, C.sub.1 -C.sub.10 -alkyl, C.sub.3 -C.sub.10 -cycloalkyl, C.sub.6 -C.sub.15 -aryl, alkylaryl of 7 to 15 carbon atoms or --OR.sup.15,R.sup.15 is C.sub.1 -C.sub.10 -alkyl, C.sub.6 -C.sub.15 -aryl, alkylaryl, arylalkyl, fluoroalkyl or fluoroaryl, each having 1 to 10 carbon atoms in the alkyl radical and 6 to 20 carbon atoms in the aryl radical,n is the valency of M minus two,R.sup.1 to R.sup.14 are each hydrogen or C.sub.1 -C.sub.10 -alkyl or are each C.sub.3 -C.sub.10 -cycloalkyl which in turn may carry C.sub.1 -C.sub.10 -alkyl as substituent, or are each C.sub.6 -C.sub.15 -aryl or arylalkyl, where two adjacent radicals together may furthermore form a cyclic group of 4 to 15 carbon atoms, or are each Si(R.sup.16).sub.3,R.sup.16 is C.sub.1 -C.sub.10 -alkyl, C.sub.6 -C.sub.15 -aryl or C.sub.3 -C.sub.10 -cycloalkyl;y.sup.1, y.sup.2 are each CH.sub.2, C(R.sup.17).sub.2, Si(R.sup.17).sub.2, Ge(R.sup.17).sub.2 or Sn(R.sup.17).sub.2,R.sup.17 is C.sub.1 -C.sub.10 -alkyl, C.sub.6 -C.sub.15 -aryl, C.sub.3 -C.sub.10 -cycloalkyl, alkylaryl or Si(R.sup.18).sub.3 andR.sup.18 is C.sub.1 -C.sub.10 -alkyl, C.sub.6 -C.sub.15 -aryl, C.sub.3 -C.sub.10 -cycloalkyl or alkylaryl,andb) an open-chain or cyclic alumoxane compound of the general formula II or III ##STR2## where R.sup.19 is C.sub.1 -C.sub.4 -alkyl and m is an integer from 5 to 30.