This invention relates to metallocene compositions and their use in the
preparation of catalyst systems for olefin polymerization, particularly
propylene polymerization. The metallocene compositions may be represented
by the formula:
##STR1##
wherein M.sup.1 is selected from the group consisting of titanium,
zirconium, hafnium, vanadium, niobium tantalum, chromium, molybdenum and
tungsten;
R.sup.1 and R.sup.2 are identical or different, and are one of a hydrogen
atom, a C.sub.1 -C.sub.10 alkyl group, a C.sub.1 -C.sub.10 alkoxy group, a
C.sub.6 -C.sub.10 aryl group, a C.sub.6 -C.sub.10 aryloxy group, a C.sub.2
-C.sub.40 alkenyl group, a C.sub.7 -C.sub.40 arylalkyl group, a C.sub.7
-C.sub.40 alkylaryl group, a C.sub.8 -C.sub.40 arylalkenyl group, an OH
group or a halogen atom, or a conjugated diene which is optionally
substituted with one or more hydrocarbyl, tri(hydrocarbyl)silyl groups or
tri(hydrocarbyl)silylhydrocarbyl groups, said diene having up to 30 atoms
not counting hydrogen;
R.sup.3 are identical or different and are each a hydrogen atom, a halogen
atom, a C.sub.1 -C.sub.10 alkyl group which may be halogenated, a C.sub.6
-C.sub.10 aryl group which may be halogenated, a C.sub.2 -C.sub.10 alkenyl
group, a C.sub.7 -C.sub.40 -arylalkyl group, a C.sub.7 -C.sub.40 alkylaryl
group, a C.sub.8 -C.sub.40 arylalkenyl group, a --NR'.sub.2, --SR', --OR',
--OSiR'.sub.3 or --PR'.sub.2 radical, wherein R' is one of a halogen atom,
a C.sub.1 -C.sub.10 alkyl group, or a C.sub.6 -C.sub.10 aryl group;
R.sup.4 to R.sup.7 are identical or different and are hydrogen, as defined
for R.sup.3 or two or more adjacent radicals R.sup.5 to R.sup.7 together
with the atoms connecting them form one or more rings;
##STR2##
--B(R.sup.14)--, --Al(R.sup.14)--, --Ge--, --Sn--, --O--, --S--, --SO--,
--SO.sub.2 --, --N(R.sup.14)--, --CO--, --P(R.sup.14)--, or
--P(O)(R.sup.14)--, or an amidoborane radical;
wherein:
R.sup.14, R.sup.15 and R.sup.16 are identical or different and are a
hydrogen atom, a halogen atom, a C.sub.1 -C.sub.20 alkyl group, a C.sub.1
-C.sub.20 fluoroalkyl or silaalkyl group, a C.sub.6 -C.sub.30 aryl group,
a C.sub.6 -C.sub.30 fluoroaryl group, a C.sub.1 -C.sub.20 alkoxy group, a
C.sub.2 -C.sub.20 alkenyl group, a C.sub.7 -C.sub.40 arylalkyl group, a
C.sub.8 -C.sub.40 arylalkenyl group, a C.sub.7 -C.sub.40 alkylaryl group,
or R.sup.14 and R.sup.15, together with the atoms binding them, form a
cyclic ring; or, R.sup.13 is represented by the formula:
##STR3##
wherein R.sup.17 to R.sup.24 are as defined for R.sup.1 and R.sup.2, or two
or more adjacent radicals R.sup.17 to R.sup.24, including R.sup.20 and
R.sup.21, together with the atoms connecting them form one or more rings;
M.sup.2 is one or more carbons, silicon, germanium or tin;
R.sup.8, R.sub.10 and R.sup.12 are identical or different and have the
meanings stated for R.sup.4 to R.sup.7 ;
R.sup.9 and R.sub.11 are identical or different and are a Group 14 radical
having from 1 to 20 carbon atoms or are each primary, secondary or
tertiary butyl groups, aryl groups, isopropyl groups, fluoroalkyl groups,
trialkyl silyl groups, or other groups of similar size.
