JP2003335810A - Olefin polymerization catalyst having transition metal complex as catalyst component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an olefin polymerization catalyst. <P>SOLUTION: The olefin polymerization catalyst has a transition metal complex to be represented by formula (1) (wherein M is a group 4 transition metal; Cp is a group having a cyclopentadiene type anion skeleton; and X<SP>1</SP>and X<SP>2</SP>are each independently a halogen atom, a 1-20C hydrocarbon group which may have a substituent; an alkoxy group which may be substituted, an aryloxy group which may be substituted, an acyloxy group which may be substituted, an alkylthio group, an arylthio group, a thioester residue, a sulfonic acid residue or a hydrocarbon two-substituted amino group, and X<SP>1</SP>and X<SP>2</SP>may be bonded to form a ring) as a catalyst component. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an olefin polymerization catalyst containing a transition metal complex as a catalyst component and a method for producing an olefin polymer.

[0002]

BACKGROUND OF THE INVENTION Many reports have been made on a method for producing an olefin polymer using a metallocene complex. For example, JP-A-58-19309 discloses a method for producing an olefin polymer using a metallocene complex and an aluminoxane. As a Group 4 transition metal complex having one cyclopentadienyl ring, JP-A-8-
Although 311120 was reported, it was difficult to say that the activity was sufficient.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an olefin polymerization catalyst having a Group 4 transition metal complex as a catalyst component and having excellent activity, and a method for producing an olefin polymer. is there.

[0004]

Means for Solving the Problems As a result of intensive studies for solving the above problems, the present inventors have found a catalyst for olefin polymerization having a Group 4 transition metal complex as a catalyst component and having excellent activity. Invented.

That is, the present invention has the general formula (1) (In the formula, M represents a Group 4 transition metal, Cp is a group having a cyclopentadiene type anion skeleton, and X ¹ , X ²
Are each independently a halogen atom, an optionally substituted hydrocarbon group having 1 to 20 carbon atoms, an alkoxy group, an aryloxy group, an acyloxy group, an alkylthio group, an arylthio group, a thioester residue, a sulfonic acid residue. , A hydrocarbon disubstituted amino group, which may be bonded to each other to form a ring. ) An olefin polymerization catalyst containing a transition metal complex represented by the formula (1) as a catalyst component; an olefin polymerization catalyst obtained by combining the transition metal complex with the following compound (B). The compound (B) is any one of the following compounds (B1) to (B3) or a mixture of two or more thereof. (B1): General formula (E1) _a AlZ _(3-a) represented by an organoaluminum compound; (B2): General formula {-Al (E2) -O-} _b ; cyclic aluminoxane; (B3) : General formula {-Al (E3) -O-} _c Al
A linear aluminoxane represented by (E3) ₂ (wherein, E1 to E3 are the same or different, a hydrocarbon group having 1 to 8 carbon atoms is shown, Z is the same or different,
A hydrogen atom or a halogen atom is shown, a is an integer of 1 to 3, b is an integer of 2 or more, and c is an integer of 1 or more. )

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. In the transition metal complex represented by the general formula (1), examples of the Group 4 transition metal complex include Ti, Zr, and Hf.

Examples of the group having a Cp cyclopentadiene type anion skeleton include a cyclopentadienyl group, a methylcyclopentadienyl group, a dimethylcyclopentadienyl group, a trimethylcyclopentadienyl group and a tetramethylcyclopentadienyl group. , Pentamethylcyclopentadienyl group, ethylcyclopentadienyl group, normal propylcyclopentadienyl group, isopropylcyclopentadienyl group, normal butylcyclopentadienyl group, sec-butylcyclopentadienyl group, t- Butylcyclopentadienyl group, di-t-butylcyclopentadienyl group, phenylcyclopentadienyl group, trimethylsilylcyclopentadienyl group, indenyl group, methylindenyl group, dimethylindenyl group, ethylindenyl group, No Mar propyl indenyl group, isopropylindenyl group, n-butyl indenyl group,
sec-butylindenyl group, t-butylindenyl group, phenylindenyl group, trimethylsilylindenyl group, fluorenyl group, methylfluorenyl group, dimethylfluorenyl group, ethylfluorenyl group, diethylfluorenyl group , Normal propyl fluorenyl group, di-normal propyl fluorenyl group, isopropyl fluorenyl group, diisopropyl fluorenyl group, normal butyl fluorenyl group, di-normal butyl fluorenyl group,
sec-butylfluorenyl group, di-sec-butylfluorenyl group, t-butylfluorenyl group, di-t-butylfluorenyl group, phenylfluorenyl group, diphenylfluorenyl group, trimethylsilylfluorene Examples thereof include an oleenyl group and a ditrimethylsilylfluorenyl group.

Examples of the halogen atom in X ¹ and X ² include fluorine, chlorine, bromine and iodine.

1 to 20 carbon atoms which may have a substituent
The hydrocarbon group is a chain or cyclic aliphatic hydrocarbon group; an aryl group which may be substituted with an alkyl, halogen, alkoxy, dialkylamino group or the like; an aralkyl group which may be substituted with an alkyl, halogen or the like. ;
Examples thereof include an alkyl group which may be substituted with halogen, alkoxy, trialkylsilyl, aralkyl and the like, a pyridyl group and the like. More specifically, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, t-butyl, n-pentyl group, neopentyl group, amyl group, t-amyl group, n- Hexyl group,
Cyclohexyl group, n-octyl group, n-decyl group, adamantyl group, phenyl group, dimethylphenyl group, tolyl group, naphthyl group, anthracenyl group, benzyl group, trimethylsilylmethyl group, methoxymethyl group, trifluoromethyl group, Examples thereof include a benzyloxymethyl group, a dimethylbenzyl group, a fluorophenyl group, a chlorophenyl group, an iodophenyl group, a methoxyphenyl group, a dimethylaminophenyl group and a pyridyl group.

As the alkoxy group, methoxy group, ethoxy group, n-propoxy group, isopropoxy group, n-butoxy group, isobutoxy group, sec-butoxy group, t-butoxy group,
Examples thereof include phenyl such as benzyloxy group and trifluoromethoxy group, and alkoxy group which may be substituted with halogen and the like. Examples of the aryloxy group include aryloxy groups which may be substituted with alkyl or the like such as phenoxy group, methylphenoxy group and naphthoxy group. Examples of the acyloxy group include an acyloxy group which may be substituted with halogen or the like such as an acetoxy group, a trifluoroacetoxy group, a pivaloyloxy group and a benzoyloxy group.

As the alkylthio group, a methylthio group,
Examples thereof include ethylthio group, n-propylthio group and i-propylthio group. A phenylthio group etc. are mentioned as an arylthio group. Examples of the thioester residue include an acetylthio group, a trifluoroacetylthio group, a benzoylthio group and the like. Examples of the sulfonic acid residue include a methanesulfonic acid residue, a trifluoromethanesulfonic acid residue, a benzenesulfonic acid residue and a p-toluenesulfonic acid residue.

Examples of the hydrocarbon disubstituted amino group include dimethylamino group, diethylamino group, diisopropylamino group, diphenylamino group, dibenzylamino group and piperidinyl group.

Examples of the transition metal complex represented by the above general formula (1) include, but are not limited to, the following compounds. In the formula, Me represents a methyl group, Ph
Represents a phenyl group and Bn represents a benzyl group.

[0014]

[0015]

[0016]

[0017]

When the olefin polymerization catalyst of the present invention is allowed to coexist with the following compound (B), a better catalytic effect can be exhibited. As the compound (B), a known organoaluminum compound can be used, and preferably the following compounds (B1) to (B
Any one of 3) or a mixture of two or more thereof may be mentioned. (B1): General formula (E1) _a AlZ _(3-a) represented by an organoaluminum compound; (B2): General formula {-Al (E2) -O-} _b ; cyclic aluminoxane; (B3) : General formula {-Al (E3) -O-} _c Al
A linear aluminoxane represented by (E3) ₂ (wherein, E1 to E3 are the same or different, a hydrocarbon group having 1 to 8 carbon atoms is shown, Z is the same or different,
A hydrogen atom or a halogen atom is shown, a is an integer of 1 to 3, b is an integer of 2 or more, and c is an integer of 1 or more. )

Specific examples of the organoaluminum compound (B1) represented by the general formula (E1) a AlZ (3-a) include triaminealuminum, triethylaluminum, tripropylaluminum, triisobutylaluminum, trihexylaluminum and the like. Alkyl aluminum; Dialkyl aluminum chloride such as dimethyl aluminum chloride, diethyl aluminum chloride, dipropyl aluminum chloride, diisobutyl aluminum halide, dihexyl aluminum chloride; methyl aluminum dichloride,
Alkyl aluminum dichlorides such as ethyl aluminum dichloride, propyl aluminum dichloride, isobutyl aluminum dichloride, hexyl aluminum dichloride; dimethyl aluminum hydride, diethyl aluminum hydride, dipropyl aluminum hydride, diisobutyl aluminum hydride, and dialkyl aluminum hydride such as dihexyl aluminum hydride. be able to. Trialkylaluminum is preferable, and triethylaluminum and triisobutylaluminum are more preferable.

A cyclic aluminoxane (B2) having a structure represented by the general formula {-Al (E2) -O-} b, a general formula E3 {-Al (E3) -O-} c Al (E3) 2.
A linear aluminoxane (B3) having a structure shown by
Specific examples of E2 and E3 in the above include alkyl groups such as methyl group, ethyl group, normal propyl group, isopropyl group, normal butyl group, isobutyl group, normal pentyl group and neopentyl group. b is an integer of 2 or more, and c is an integer of 1 or more. Preferably, E2 and E3 are methyl groups or isobutyl groups, b is an integer of 2-40, and c is an integer of 1-40.

The above aluminoxane can be produced by various methods. The method is not particularly limited, and it can be produced according to a known method. For example, it can be produced by bringing a solution of trialkylaluminum (eg, trimethylaluminum) dissolved in a suitable organic solvent (benzene, aliphatic hydrocarbon, etc.) into contact with water. In addition, a method in which a trialkylaluminum (eg, trimethylaluminum) is brought into contact with a metal salt containing crystal water (eg, copper sulfate hydrate) can be exemplified.

[Compound C] The polymerization catalyst of the present invention can exhibit a better catalytic effect by allowing the compound (B) and the compound (C) to coexist. Examples of the compound (C) include (C1): a boron compound represented by the general formula B (Q1) (Q2) (Q3); (C2): general formula Z ⁺ {B (Q1) (Q2) (Q
3) a boron compound represented by (Q4) ^- }; (C3): general formula (L-H) ⁺ {B (Q1) (Q
2) a boron compound represented by (Q3) (Q4) ^- } (wherein, B is a boron atom in a trivalent valence state, and
1 to Q4 are the same or different, and are a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a halogenated hydrocarbon group having 1 to 20 carbon atoms, a hydrocarbon-substituted silyl group having 1 to 20 carbon atoms, carbon It represents an alkoxy group having 1 to 20 atoms or a hydrocarbon disubstituted amino group having 2 to 20 carbon atoms. )
Is mentioned.

In the boron compound (C1) represented by the general formula BQ1 Q2 Q3, B is a boron atom in a trivalent valence state, Q1 to Q3 are the same or different, and are a halogen atom and a carbon atom number of 1 to 20. Hydrocarbon group, halogenated hydrocarbon group having 1 to 20 carbon atoms, 1 to 2 carbon atoms
A hydrocarbon-substituted silyl group having 0, an alkoxy group having 1 to 20 carbon atoms, or a hydrocarbon-disubstituted amino group having 2 to 20 carbon atoms, and preferred Q1 to Q3 are a halogen atom and 1
A hydrocarbon group containing 20 to 20 carbon atoms and a halogenated hydrocarbon group containing 1 to 20 carbon atoms.

Specific examples of the boron compound (C1) include:
Tris (pentafluorophenyl) borane, tris (2,3,5,6-tetrafluorophenyl) borane,
Tris (2,3,4,5-tetrafluorophenyl) borane, tris (3,4,5-trifluorophenyl) borane, tris (2,3,4-trifluorophenyl) borane, phenylbis (pentafluorophenyl) ) Borane and the like can be mentioned, and more preferably tris (pentafluorophenyl) borane can be mentioned.

In the boron compound (C2) represented by the general formula Z + (BQ1 Q2 Q3 Q4)-, Z + is an inorganic or organic cation, B is a boron atom in a trivalent valence state, and Q1 ~ Q4 is Q in (C1) above
The same as 1 to Q3 can be mentioned.

Specific examples of the compound represented by the general formula Z + (BQ1 Q2 Q3 Q4)-include inorganic cations Z + such as a ferrocenium cation, an alkyl-substituted ferrocenium cation, and a silver cation. Examples of the organic cation Z + include triphenylmethyl cation and the like. (BQ1 Q2 Q3 Q4)-contains tetrakis (pentafluorophenyl) borate,
Tetrakis (2,3,5,6-tetrafluorophenyl) borate, tetrakis (2,3,4,5-tetrafluorophenyl) borate, tetrakis (3,4,5-
Trifluorophenyl) borate, tetrakis (2,2
2,4-trifluorophenyl) borate, phenylbis (pentafluorophenyl) borate, tetrakis (3,5-bistrifluoromethylphenyl) borate and the like can be mentioned.

Specific combinations of these include ferrocenium tetrakis (pentafluorophenyl) borate, 1,1'-dimethylferrocenium tetrakis (pentafluorophenyl) borate, silver tetrakis (pentafluorophenyl) borate, tri Phenylmethyltetrakis (pentafluorophenyl) borate,
Examples thereof include triphenylmethyltetrakis (3,5-bistrifluoromethylphenyl) borate, but triphenylmethyltetrakis (pentafluorophenyl) borate is more preferable.

Further, the general formula (L-H) + (BQ1 Q2 Q
In the boron compound (C3) represented by 3 Q4)-,
L is a neutral Lewis base, (L-H) + is a Bronsted acid, B is a boron atom in a trivalent valence state, and Q1 to Q4 are the same as Q1 to Q3 in the above (C1). The same thing is mentioned.

General formula (L-H) + (BQ1 Q2 Q3 Q4
Specific examples of the compound represented by)-include (L-H) + which is a Bronsted acid, such as trialkyl-substituted ammonium, N, N-dialkylanilinium, dialkylammonium and triarylphosphonium. Examples of (BQ1 Q2 Q3 Q4)-are the same as those mentioned above.

Specific examples of these combinations include triethylammonium tetrakis (pentafluorophenyl) borate, tripropylammonium tetrakis (pentafluorophenyl) borate, tri (normal butyl) ammonium tetrakis (pentafluorophenyl) borate, tri (normal). Butyl) ammonium tetrakis (3,5-bistrifluoromethylphenyl) borate, N, N-dimethylanilinium tetrakis (pentafluorophenyl) borate, N, N-diethylanilinium tetrakis (pentafluorophenyl) borate, N, N- 2,4,6-Pentamethylanilinium tetrakis (pentafluorophenyl) borate, N, N-dimethylanilinium tetrakis (3,5
-Bistrifluoromethylphenyl) borate, diisopropylammonium tetrakis (pentafluorophenyl) borate, dicyclohexylammonium tetrakis (pentafluorophenyl) borate, triphenylphosphonium tetrakis (pentafluorophenyl)
Examples thereof include borate, tri (methylphenyl) phosphonium tetrakis (pentafluorophenyl) borate, and tri (dimethylphenyl) phosphonium tetrakis (pentafluorophenyl) borate, but more preferably tri (normal butyl) ammonium tetrakis (penta). Fluorophenyl) borate, N, N
-Dimethylanilinium tetrakis (pentafluorophenyl) borate and the like.

The polymerization method will be described below. Regarding the amount of each catalyst component used for polymerization, the molar ratio of compound (B) / transition metal complex is usually 0.1 to 10000, preferably 5 to 2000, and compound (C) / transition metal complex is usually used. It is preferable to use each component so that the molar ratio is usually in the range of 0.01 to 100, preferably 0.5 to 10.

In the present invention, the monomer used for the polymerization is any of olefins having 2 to 20 carbon atoms, diolefins, and olefins having polar substituents such as carboxylic acids, esters and amino groups. Can also be used, and two or more types of monomers can be used at the same time. Examples of such monomers are shown below, but the present invention is not limited to the following compounds. Specific examples of such olefin include ethylene, propylene, butene-
1, pentene-1, hexene-1, heptene-1, octene-1, nonene-1, decene-1,5-methyl-2-
Pentene-1, vinylcyclohexene and the like, as the diolefin compound, a conjugated diene of a hydrocarbon compound, a non-conjugated diene, and the like, as a specific example of such a compound, as a specific example of a non-conjugated diene compound, 1, 5-
Hexadiene, 1,4-hexadiene, 1,4-pentadiene, 1,7-octadiene, 1,8-nonadiene,
1,9-decadiene, 4-methyl-1,4-hexadiene, 5-methyl-1,4-hexadiene, 7-methyl-
1,6-octadiene, 5-ethylidene-2-norbornene, dicyclopentadiene, 5-vinyl-2-norbornene, 5-methyl-2-norbornene, norbornadiene, 5-methylene-2-norbornene, 1,5-cyclooctane Examples thereof include diene and 5,8-endomethylenehexahydronaphthalene. Specific examples of the conjugated diene compound include 1,3-butadiene, isoprene, 1,3-hexadiene, 1,3-octadiene and 1,3-cyclo. Examples thereof include octadiene and 1,3-cyclohexadiene, and specific examples of the olefin having a polar substituent include acrylic acid, methyl acrylate, methacrylic acid, methyl methacrylate, vinyl acetate and the like. It
More preferably, ethylene is used.

Specific examples of the monomers constituting the copolymer include ethylene and propylene, ethylene and butene-1,
Examples are ethylene and hexene-1, propylene and butene-1, and the like, but the present invention is not limited to the above compounds.

The polymerization method is also not particularly limited, but for example, butane, pentane, hexane, heptane,
Solvent polymerization using aliphatic hydrocarbons such as octane, aromatic hydrocarbons such as benzene and toluene, or halogenated hydrocarbons such as methylene dichloride as a solvent, or slurry polymerization, gas phase polymerization in a gaseous monomer, etc. It is possible, and either continuous polymerization or batchwise polymerization is possible.

The polymerization temperature can be usually in the range of -50 ° C to 200 ° C, but is preferably in the range of -20 ° C to 100 ° C, and the polymerization pressure is from normal pressure to 60 kg / cm.
About 2 G (6 MPa) is preferable. The polymerization time is appropriately selected depending on the type of the target polymer and the reaction device, but generally, it can be in the range of about 1 minute to 20 hours. Further, in the present invention, a chain transfer agent such as hydrogen may be added to control the molecular weight of the copolymer.

[0036]

The Group 4 transition metal complex used in the present invention exhibits an excellent olefin polymerization ability and is useful as a catalyst for olefin polymerization.

[0037]

The present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.

The reaction was carried out under nitrogen. (Synthesis example 1) Synthesis of complex A The reaction was performed under nitrogen. 170 mg (0.77 mmol) of cyclopentadienyl titanium trichloride was dissolved in 4 ml of toluene and cooled to -10 ° C. To this solution, 200 mg (0.77 mmol) triphenylmethanol, 8 triethylamine
A mixed solution of 3 mg (0.81 mmol) and 4 ml of toluene was added dropwise.
The temperature was raised to room temperature, and after stirring for 7 hours, the insoluble matter was filtered and washed with toluene. The filtrate was concentrated and recrystallized from toluene to obtain 252 mg (apparent yield 65%) of complex A. 1H-NMR (C6
D6) δ5.88 (5H, s), δ6.89〜7.51 (15H, m)

Synthesis Example 2 Synthesis of Complex B Dissolve 200 mg (0.85 mmol) of pentamethylcyclopentadienyltitanium trimethyl in 90 ml of pentane and -78 ℃
Cooled to. 232 mg of triphenylmethanol in this solution
A mixed solution of (0.89 mmol), pentane 4 ml and toluene 6 ml was added dropwise. After warming to room temperature and stirring for 4 hours, the reaction solution was concentrated. Recrystallized from pentane to give 379 mg (apparent yield 94
%) Of complex B was obtained. 1H-NMR (CD2Cl2) δ0.21 (6H, s),
δ1.73 (15H, s), δ7.23〜7.42 (15H, m)

(Examples 1 and 2) Polymerization Polymerization was carried out by the following procedure. The polymerization results are shown in Table 1. Under a nitrogen atmosphere, 100 ml of toluene was charged into a separable flask with a jacket and stabilized at 25 ° C., and then ethylene was bubbled under normal pressure. Where M
A hexane solution of MAO (2 mmol) and 2 μmol of the transition metal complex prepared in the synthesis example were added to initiate polymerization. After stirring, bubbling of ethylene was stopped and a 5% hydrochloric acid aqueous solution was added to stop the polymerization. Methanol was added to the obtained mixture, insoluble matter was filtered, and dried under reduced pressure to obtain a polymer.

[Table 1]

(Examples 3 to 4) Polymerization Polymerization was carried out in the following procedure. The polymerization results are shown in Table 2. 100 ml of toluene was charged into a separable flask with a jacket under nitrogen and stabilized at 25 ° C., and then ethylene was bubbled under normal pressure. To this, a hexane solution of triisobutylaluminum (2 mmol), 5 μmol of the transition metal complex prepared in the synthesis example and 15 μmol of triphenylcarbenium tetrakispentafluorophenylborate were added to initiate polymerization. After stirring, bubbling of ethylene was stopped and a 5% hydrochloric acid aqueous solution was added to stop the polymerization. Methanol was added to the obtained mixture, insoluble matter was filtered, and dried under reduced pressure to obtain a polymer.

[Table 2]

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takayuki Azumai             Sumitomo, 2-10-1 Tsukahara, Takatsuki City, Osaka Prefecture             Gaku Kogyo Co., Ltd. F-term (reference) 4H049 VN05 VP01 VQ05 VU14 VW02                 4H050 AA03 AB40                 4J128 AA01 AB00 AB01 AC01 AC10                       AC28 AD01 AD11 AD13 AD16                       AD17 AD19 BA01B BA02B                       BB00B BB01B BC12B BC15B                       BC16B BC17B BC25B BC27B                       EA01 EB02 EB04 EB05 EB07                       EB08 EB09 EB12 EB13 EB14                       EB16 EB17 EB18 EB24 EB25                       EC01 EC02 GB02

Claims (5)

[Claims] 1. A general formula (1) (In the formula, M represents a Group 4 transition metal, Cp is a group having a cyclopentadiene type anion skeleton, and X ¹ , X ²
Are each independently a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms which may have a substituent, an alkoxy group which may be substituted, an aryloxy group which may be substituted, and a substituent which may be substituted. It represents a good acyloxy group, an alkylthio group, an arylthio group, a thioester residue, a sulfonic acid residue or a hydrocarbon disubstituted amino group, and X ¹ and X ² may be bonded to each other to form a ring. ) A catalyst for olefin polymerization, which comprises a transition metal complex represented by the formula (1) as a catalyst component. 2. In the general formula (1), the hydrocarbon group having 1 to 20 carbon atoms which may have a substituent is a chain or cyclic aliphatic hydrocarbon group; alkyl, halogen, alkoxy or dialkylamino. An aryl group which may be substituted with; an aralkyl group which may be substituted with alkyl or halogen; an alkyl group which may be substituted with halogen, alkoxy, trialkylsilyl or aralkyl, and a pyridyl group. The catalyst for olefin polymerization described. 3. An olefin polymerization catalyst comprising a combination of the transition metal complex represented by the general formula (1) according to claim 1 and the following compound (B). The compound (B) is any one of the following compounds (B1) to (B3) or a mixture of two or more thereof. (B1): General formula (E1) _a AlZ _(3-a) represented by an organoaluminum compound; (B2): General formula {-Al (E2) -O-} _b ; cyclic aluminoxane; (B3) : General formula {-Al (E3) -O-} _c Al
A linear aluminoxane represented by (E3) ₂ (wherein, E1 to E3 are the same or different, a hydrocarbon group having 1 to 8 carbon atoms is shown, Z is the same or different,
A hydrogen atom or a halogen atom is shown, a is an integer of 1 to 3, b is an integer of 2 or more, and c is an integer of 1 or more. ) 4. The transition metal complex represented by the general formula (1) according to claim 1, the compound (B) and the compound (C).
A catalyst for olefin polymerization which is a combination of The compound (C) is any one of the following compounds (C1) to (C3) or a mixture of two or more thereof. (C1): Boron compound represented by the general formula B (Q1) (Q2) (Q3); (C2): General formula Z ⁺ {B (Q1) (Q2) (Q
3) a boron compound represented by (Q4) ^- }; (C3): general formula (L-H) ⁺ {B (Q1) (Q
2) a boron compound represented by (Q3) (Q4) ^- } (wherein, B is a boron atom in a trivalent valence state, and
1 to Q4 are the same or different, and are a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a halogenated hydrocarbon group having 1 to 20 carbon atoms, a hydrocarbon-substituted silyl group having 1 to 20 carbon atoms, carbon It represents an alkoxy group having 1 to 20 atoms or a hydrocarbon disubstituted amino group having 2 to 20 carbon atoms. ) 5. A method for producing an olefin polymer, which comprises polymerizing or copolymerizing an olefin in the presence of the olefin polymerization catalyst according to any one of claims 1 to 4.