Patent ID: 6316560
Filing Date: 2001-11-13
Classification: C08F,Y10S

Abstract:
A process for preparing a cycloolefin copolymer which comprises polymerized units of which from 0.1 to 99.9% by weight, based on the total amount of monomers, are derived from at least one polycyclic olefin of the formula IV, V, V', VI, VII, VIII or IX ##STR10##whereR.sup.9, R.sup.10, R.sup.11, R.sup.12, R.sup.13, R.sup.14, R.sup.15 and R.sup.16 are identical or different and are each a hydrogen atom or a hydrocarbon radical, where identically numbered radicals in the various formulae can have different meanings, from 0 to 99.9% by weight, based on the total amount of monomers, are derived from at least one monocyclic olefin of the formula X ##STR11##whereinq is from 2 to 10, and from 0.1 to 99.9% by weight, based on the total amount of monomers, are derived from at least one acyclic 1-olefin of the formula XI ##STR12##whereinR.sup.17, R.sup.18, R.sup.19 and R.sup.20 are identical or different and are each a hydrogen atom or a hydrocarbon radical,which comprises polymerizing in the presence of a catalyst system comprising at least one cocatalyst and at least one metallocene wherein said at least one metallocene is of the formula II ##STR13##whereinM.sup.1 is titanium, zirconium or hafnium,R.sup.1 is an indenyl group or a 4,5,6,7-tetrahydroindenyl group which is substituted in positions 2 and 3 exclusively by hydrogen atoms and in positions 4, 5, 6 and 7 may contain further substituents in place of hydrogen,R.sup.1' is a cyclopentadienyl group which is substituted in position 3 by a C.sub.2 -C.sub.40 -group which is optionally halogenated, SiR.sup.4.sub.3, NR.sup.4.sub.2, SiR(OR.sup.4).sub.3, Si(SR.sup.4).sub.3 or PR.sup.4.sub.2, where R.sup.4 are identical or different and are each a halogen atom, a C.sub.1 -C.sub.10 -alkyl group or a C.sub.6 -C.sub.10 -aryl group or form a ring system, and in the further positions 2, 4 and 5 may bear further substituents,R.sup.2 is a single-, two- or three-membered bridge which links R.sup.1 and R.sup.1' in each case via position 1 and is ##STR14##whereinR.sup.5 are identical or different and are each a hydrogen atom, a C.sub.1 -C.sub.40 -group which is optionally halogenated, wherein O=1, 2 or 3,M.sup.2 is silicon,R.sup.3 are identical or different and are each a hydrogen atom, a C.sub.1 -C.sub.40 -group, an OH group, a halogen atom or NR.sup.7.sub.2, where R.sup.7 is a halogen atom, a C.sub.1 -C.sub.10 -alkyl group or a C.sub.6 -C.sub.10 -aryl group, or R.sup.3 together with the atoms connecting them form a ring system, where n=2.