Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Reexamination Certificate
2002-05-31
2004-05-04
Harlan, Robert Deshon (Department: 1713)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
C502S122000, C502S123000, C502S155000, C502S167000, C526S161000, C526S171000
Reexamination Certificate
active
06730626
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a transition metal compound, a catalyst for polymerizing olefin, an olefin base polymer using the above catalyst and a production process for the same. More specifically, the present invention relates to a transition metal compound which is useful as a catalyst component for polymerizing olefin and which is easily synthesized, a highly active catalyst for polymerizing olefin which comprises the above transition metal compound and which efficiently provides olefin base homopolymers and copolymers, an olefin base polymer obtained by using this catalyst and a process for efficiently producing the same.
RELATED ART
As a catalyst for producing soluble polyolefin, a catalyst called a metallocene catalyst comprising a compound having a cyclopentadienyl ring as a ligand containing the fourth periodic table group transition metal have so far been known (Japanese Patent Application Laid-Open No. 19309/1983, Japanese Patent Application Laid-Open No. 217209/1985, Japanese Patent Application Laid-Open No. 167307/1990 and the like). These metallocene catalysts are characterized in that they provide polymers having a narrow molecular weight distribution and are excellent in a copolymerizing property, but they have the defect that complicated operation is necessary in synthesizing a metallocene compound and that the production cost inevitably comes higher.
On the other hand, as a novel catalyst which is different from them, the fourth periodic table group transition metal complexes of a non-metallocene base (Japanese Patent Application Laid-Open No. 315109/1999) and catalyst systems comprising various non-metallocene base transition metal complexes (Japanese Patent Application Laid-Open No. 227608/1992, Japanese Patent Application Laid-Open No. 203106/1986, Japanese Patent Application Laid-Open No. 115311/1991, International Patent Publication No. 99-12981 and International Patent Publication No. 98-27124) are developed in recent years. It is known that the non-metallocene base transition metal complexes described above are easily synthesized and provide catalysts for polymerizing olefins having a high activity.
However, catalysts systems comprising these non-metallocene base transition metal complexes are highly active to ethylene but have a very low activity in producing homopolymers and copolymers of &agr;-olefins having 3 or more carbon atoms such as propylene, and they are not satisfactory from an industrial point of view.
DISCLOSURE OF THE INVENTION
Under such circumstances, an object of the present invention is to provide a novel transition metal compound which is useful as a catalyst component for polymerizing propylene and other &agr;-olefins as well as ethylene and which is easily synthesized, a highly active catalyst for polymerizing olefins which comprises the above transition metal compound and which efficiently provides various olefin base homopolymers and copolymers, an olefin base polymer and copolymer obtained by using the above catalyst for polymerization. A further object of the present invention is to provide a production process for the same transition metal compound, catalyst, etc.
Intensive researches repeated by the present inventors in order to achieve the object of the present invention have resulted in finding that a transition metal compound having a specific structure is easily synthesized and useful as a catalyst component for polymerizing not only ethylene but also propylene and other &agr;-olefins and that a catalyst for polymerization comprising the above transition metal compound and an activation cocatalyst has a high activity and efficiently provides ethylene (co)polymers, propylene (co)polymers and other olefin base (co)polymers. The present invention has been completed based on such knowledges.
That is, the present invention provides:
(1) a transition metal compound represented by Formula (I):
wherein M represents a transition metal element of the fourth group in the periodic table; X represents a &sgr; bonding ligand which is bonded to M, and when plural X's are present, plural X's may be the same as or different from each other; Y represents a Lewis base, and when plural Y's are present, plural Y's may be the same as or different from each other; T represents a group containing a &sgr; bonding atom which is bonded to M; E is a group containing an atom which can coordinate with M via a lone pair, and E represents —OR
5
, —SR
5
, —SeR
5
, —NR
5
2
, —PR
5
2
or —P (O)R
5
2
; q is 1 or 2 and represents [(valency of M)−2]; r represents an integer of 0 to 3; R
1
to R
4
and R
5
each represent a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a halogen-containing hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing group or a hetero atom-containing group; R
1
to R
4
may be the same as or different from each other and may form a ring together with an adjacent group; and when plural R
5
's are present, plural R
5
's may be the same as or different from each other,
(2) a catalyst for polymerizing olefin, characterized by comprising the transition metal compound represented by Formula (I) and an activation-aid catalyst as principal components,
(3) an olefin base polymer obtained by using the catalyst for polymerizing olefin described above, and
(4) a production process for an olefin base polymer, characterized by homopolymerizing olefins or copolymerizing olefins with other olefins and/or other monomers in the presence of the catalyst for polymerizing olefin described above.
BEST MODE FOR CARRYING OUT THE INVENTION
The transition metal compound of the present invention is a novel compound represented by Formula (I):
In Formula (I), M represents a transition metal element of the fourth group in the periodic table, and the specific examples thereof include titanium, zirconium and hafnium. Further in Formula (I), X represents a &sgr; bonding ligand which is bonded to M, and when plural X's are present, plural X's may be the same as or different from each other. Said X includes a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, an alkoxyl group having 1 to 20 carbon atoms, an aryloxy group having 6 to 20 carbon atoms, an amide group having 1 to 20 carbon atoms, a silicon-containing group having 1 to 30 carbon atoms, a phosphide group having 1 to 20 carbon atoms, a sulfide group having 1 to 20 carbon atoms and an acyl group having 1 to 20 carbon atoms. The halogen atom includes a chlorine atom, a fluorine atom, a bromine atom and an iodine atom. The hydrocarbon group having 1 to 20 carbon atoms includes, to be specific, alkyl groups such as methyl, ethyl, propyl, butyl, hexyl, cyclohexyl and octyl and alkenyl groups such as vinyl, propenyl and cyclohexenyl; arylalkyl groups such as benzyl, phenylethyl and phenylpropyl; and aryl groups such as phenyl tolyl, dimethylphenyl, trimethylphenyl, ethylphenyl, propylphenyl, biphenyl, naphthyl, methylnaphthyl, anthracenyl and phenanthryl. The alkoxyl group having 1 to 20 carbon atoms includes alkoxyl groups such as methoxy, ethoxy, propoxy and butoxy, phenylmethoxy and phenylethoxy. The aryloxy group having 6 to 20 carbon atoms includes phenoxy, methylphenoxy and dimethylphenoxy. The amide group having 1 to 20 carbon atoms includes alkylamide groups such as dimethylamide, diethylamide, dipropylamide, dibutylamide, dicyclohexylamide and methylethylamide; alkenylamide groups such as divinylamide, dipropenylamide and dicyclohexenylamide; arylalkylamide groups such as dibenzylamide, phenylethylamide and phenylpropylamide; and arylamide groups such diphenylamide and dinaphthylamide. The silicon-containing group having 1 to 30 carbon atoms includes monohydrocarbon-substituted silyl groups such as methylsilyl and phenylsilyl; dihydrocarbon-substituted silyl groups such as dimethylsilyl and diphenylsilyl; trihydrocarbon-substituted silyl groups such as trimethylsilyl, triethylsilyl, tripropylsilyl, dimethyl (t-butyl) silyl, tricyclohexyls
Kashiwamura Takashi
Okamoto Takuji
Harlan Robert Deshon
Idemitsu Petrochemical Co. Ltd.
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