Appeal No. 1999-1418
Application No. 08/418,847
for the cyclic type, in which, in the formulae (II) and (III),
R is a C -C -alkyl group and n is an integer from 2 to 50,10 1 6
wherein the metallocene is at least one compound of the
formula (I)
in which
M is zirconium or hafnium,
1 2
R and R are identical or different and are a hydrogen
atom, a C -C -alkyl group, a C -C -alkoxy group,1 10 1 10
a C -C -aryl group, a C -C -aryloxy group, a C -C -6 10 6 10 2 10
alkenyl group, a C -C -arylalkyl group, a
7 40
C -C -alkylaryl group, a C -C -arylalkenyl group740 8
7 40 40
or a halogen atom,
3 4
R and R are identical or different and are a hydrogen
atom, a halogen atom, a C -C -alkyl group or a
1 10
9 9 9 9 19 9
-NR , SR , -OR , -OSir -Sir or -PR radical,103
2 3, 2
in which R is a C -C -alkyl group, a C -C -aryl9 1 10 6 10
group or, in the case of radicals containing Si
or P, also a halogen atom,
2
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