Patent EP-1313746-A1 (EP)
Inventor: BURKHARDT TERRY J
IPC: C07F7/00
Filed: 2001-05-21
Abstract: 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:   
wherein M 1  is selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum and tungsten, preferably zirconium, hafnium or titanium, most preferably zirconium; 
R 1  and R 2  are identical or different, and are one of a hydrogen atom, a C 1 -C 10  alkyl group, a C 1 -C 10  alkoxy group, a C 6 -C 10  aryl group, a C 6 -C 10  aryloxy group, a C 2 -C 10  alkenyl group, a C 2 -C 40  alkenyl group, a C 7 -C 40  arylalkyl group, a C 7 -C 40  alkylaryl group, a C 8 -C 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 hydrocarbyl, tri(hydrocarbyl)silylhydrocarbyl groups, said diene having up to 30 atoms not counting hydrogen; 
preferably R 1  and R 2  are identical and are a C 1 -C 3  alkyl or alkoxy group, a C 6 -C 8  aryl or aryloxy group, a C 2 -C 4  alkenyl group, a C 7 -C 10  arylalkyl group, a C 7 -C 12  alkylaryl group, or a halogen atom, preferably chlorine; 
R 3  are identical or different and are each a hydrogen atom, a halogen atom, a C 1 -C 10  alkyl group which may be halogenated, a C 6 -C 10  aryl group which may be halogenated, a C 2 -C 10  alkenyl group, a C 7 -C 40  -arylalkyl group, a C 7 -C 40  alkylaryl group, a C 8 -C 40  arylalkenyl group, a -NR' 2 , -SR', -OR, -OSiR' 3  or -PR' 2  radical, wherein R' is one of a halogen atom, a C 1 -C 10  alkyl group, or a C 6 -C 10  aryl group; preferably R 3  is not a hydrogen atom; 
preferably each R 3  is identical and is a fluorine, chlorine or bromine, atom, a C 1 -C 4  alkyl group which may be halogenated, a C 6 -C 8  aryl group which may be halogenated, a -NR' 2 , -SR', -OR', -OSiR' 3  or -PR' 2  radical, wherein R' is one of a chlorine atom, a C 1 -C 4  alkyl group, or a C 6 -C 8  aryl group; 
more preferably, R 3  are identical and are each a C 3  alkyl group, most preferably isopropyl groups; 
alternatively, R 3  is a C 1  or C 2  alkyl group; 
R 4  to R 7  are identical or different and are hydrogen, as defined for R 3  or two or more adjacent radicals R 5  to R 7  together with the atoms connecting them form one or more rings, preferably a 4-8 membered ring , more preferably a 6-membered ring; 
R 13  is       
-B(R 14 )-, -Al(R 14 )-, -Ge-, -Sn-, -O-, -S-, -SO-, -SO 2 -, -N(R 14 )-, -CO-, -P(R 14 )-, or -P(O)(R 14 )-, or an amidoborane radical; 
wherein:  R 14 , R 15 and R 16  are identical or different and are a hydrogen atom, a halogen atom, a C 1 -C 20  alkyl group, a C 1 -C 20  fluoroalkyl or silaalkyl group, a C 6 -C 30  aryl group, a C 6 -C 30  fluoroaryl group, a C 1 -C 20  alkoxy group, a C 2 -C 20  alkenyl group, a C 7 -C 40  arylalkyl group, a C 8 -C 40  arylalkenyl group, a C 7 -C 40  alkylaryl group, or R 14  and R 15 , together with the atoms binding them, form a cyclic ring;  preferably, R 14 , R 15 and R 16  are identical and are a hydrogen atom, a halogen atom, a C 1 -C 4  alkyl group, a CF 3  group, a C 6 -C 8  aryl group, a C 6 -C 10  fluoroaryl group, more preferably a pentafluorophenyl group, a C 1 -C 4  alkoxy group, in particular a methoxy group, a C 2 -C 4  alkenyl group, a C 7 -C 10  arylalkyl group, a C 8 -C 12  arylalkenyl group, or a C 7 -C 12 alkylaryl group;  M 2  is one or more carbons, silicon, germanium or tin, preferably silicon;  R 8 , R 10  and R 12  are identical or different and have the meanings stated for R 4  to R 7 ;  R 9  and R 11  are identical or different and are a Group IVA 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, preferably a tertiary butyl group.