JP2001172319A - Polymerization catalyst comprising diimino-substituted dibenzothiophene - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a catalyst for polymerizing an olefin. SOLUTION: The catalyst for polymerizing an olefin is composed of a component (A) obtained by mixing an iron compound represented by general formula (1): MXmLn (wherein M is Fe; X is a halogen; L is an organic ligand; and (m) and (n) are each 0-6) with a diimino-substituted dibenzothiophene derivative represented by general formula (2) (wherein R1 is hydrogen, an alkyl, or the like), an organoaluminum compound (B) and a boron compound (C).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a polymerization catalyst using a dibenzothiophene derivative and an Fe compound, and a method for producing an olefin polymer using the catalyst.

[0002]

2. Description of the Related Art Heretofore, there has not been known a polymerization catalyst represented by the general formula (1) comprising a diimino-substituted dibenzothiophene derivative and an Fe compound.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a novel polymerization catalyst and a method for producing an olefin polymer using the same.

[0004]

That is, the present invention provides a catalyst for olefin polymerization characterized by using the following components (A), compound (B) and compound (C), and polymerization of olefin using the catalyst. And a method for producing an olefin polymer.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. In the Fe compound represented by the general formula (1) of the present invention, examples of the halogen atom in the substituent X include a fluorine atom, a chlorine atom, a bromine atom and an iodine atom. Organic ligands L include olefin ligands, acetylene ligands, aromatic compound ligands, organic oxygen-containing compound ligands, organic sulfur-containing compounds, in addition to CO, NO, NH2, NH3, etc. And ligands of organic nitrogen-containing compounds.

[0006] Examples of the Fe compound in the present invention include iron halide compounds, such as iron dichloride, iron trichloride, and compounds in which chlorine is changed to fluorine, bromine, and iodine.

In the diimino-substituted dibenzothiophene compound represented by the general formula (2), examples of the alkyl group having 1 to 20 carbon atoms for R ¹ include a methyl group, an ethyl group, an n-propyl group, an isopropyl group and an n-butyl group. Group, s-butyl group, t-butyl group, n-pentyl group, n-hexyl group, cyclohexyl group and the like. Examples of the aryl group having 6 to 20 carbon atoms for R ² include a phenyl group, an o-tolyl group, an m-tolyl group, a p-tolyl group,
3-xylyl group, 2,4-xylyl group, 2,5-xylyl group, 2,6-xylyl group, 2,3-diisopropylphenyl group, 2,4-diisopropylphenyl group, 2,5
-Diisopropylphenyl group, 2,6-diisopropylphenyl group, α-naphthyl group, β-naphthyl group and the like.

Specific examples of the diimino-substituted dibenzothiophene compound represented by the general formula (2) include, for example, 1,8-
Bis (N-phenyl-formaldimino) -dibenzothiophene, 1,8-bis (No-tolyl-formaldimino) -dibenzothiophene, 1,8-bis (N
-M-tolyl-formaldimino) -dibenzothiophene, 1,8-bis (Np-tolyl-formaldimino) -dibenzothiophene, 1,8-bis (N-2,
3-diisopropylphenyl-formaldimino)-
Dibenzothiophene, 1,8-bis (N-2,4-diisopropylphenyl-formaldimino) -dibenzothiophene, 1,8-bis (N-2,5-diisopropylphenyl-formaldimino) -dibenzothiophene, , 8-bis (N-2,6-diisopropylphenyl-formaldimino) -dibenzothiophene, and compounds in which these formaldimine moieties are changed to acetoaldimine, benzoaldimine, and the like.

The diimino-substituted dibenzothiophene compound represented by the general formula (2) (Wherein, R ¹ has the same meaning as described above.) And a primary aniline derivative having 6 to 20 carbon atoms.

Specific examples of the dibenzothiophene derivative represented by the general formula (3) include, for example, 1,8-diformyldibenzothiophene, 1,8-diacetyldibenzothiophene, and 1,8-dibenzoyldibenzothiophene. You.

The primary aniline derivative having 6 to 20 carbon atoms includes, for example, aniline, o-methylaniline, m-
Methylaniline, p-methylaniline, 2,3-dimethylaniline, 2,4-dimethylaniline, 2,5-dimethylaniline, 2,6-dimethylaniline, 2,3-diisopropylaniline, 2,4-diisopropylaniline, Examples thereof include 2,5-diisopropylaniline and 2,6-diisopropylaniline.

Diiminodibenzothiophene derivative (2)
Is a method in which the dibenzothiophene derivative (3) is reacted with a primary aniline derivative having 6 to 20 carbon atoms, but an acid catalyst or the like may coexist.

The amount of the aniline derivative used is usually in the range of about 2 to 50 times, preferably about 2 to 5 times the molar amount of the dibenzothiophene derivative (3).

A solvent may be used in the reaction. Examples of such a solvent include aliphatic hydrocarbons such as pentane, hexane, cyclohexane, heptane and octane, and aromatic hydrocarbons such as benzene, toluene, xylene, mesitylene and ethylbenzene. Hydrogen, or chloroform, methylene dimethoxide, monochlorobenzene, halogenated hydrocarbons such as dichlorobenzene, diethyl ether, ether solvents such as tetrahydrofuran, and the like,
Further, it can be carried out without a solvent. These solvents are used alone or in combination of two or more,
The amount used is usually in the range of 0 to 200 times by weight, preferably 3 to 30 times by weight, based on the dibenzothiophene derivative (3).

Examples of the acid catalyst which may be used include inorganic acids such as hydrochloric acid and sulfuric acid, and organic acids such as p-toluenesulfonic acid. The amount of the acid catalyst used is usually based on the dibenzothiophene derivative (3). The range is about 0.005 to 0.1 times, preferably about 0.01 to 0.05 times.

In the reaction, the dibenzothiophene derivative (3) and the aniline derivative may be brought into contact with each other. If necessary, reflux dehydration or contact with a dehydrating agent such as molecular sieve may be carried out. May coexist. The reaction temperature is usually from 0 ° C to the boiling point of the solvent. The reaction time is not particularly limited. After completion of the reaction, for example, the crystals obtained by concentrating the mixture are collected by filtration to obtain a diiminodibenzothiophene derivative (2).
Can be obtained.

The method of mixing the Fe compound represented by the general formula (1) with the diimino-substituted dibenzothiophene compound represented by the general formula (2) is not particularly limited. It can be preferably carried out by mixing the Fe compound represented by the general formula (1) and the diimino-substituted dibenzothiophene compound represented by the general formula (2) in the presence or absence of the compound.

The charging ratio of the diimino-substituted dibenzothiophene compound represented by the general formula (2) to the Fe compound represented by the general formula (1) is usually 0.1 to 10 times, preferably 0.5 to 10 times. It is about 2 mole times.

The solvent is not particularly limited, but may be aliphatic hydrocarbons such as pentane, hexane, heptane, octane and decane; aromatic hydrocarbons such as benzene, toluene, xylene and mesitylene; and aliphatic hydrocarbons such as dichloromethane, chloroform and dichloroethane. Aromatic halogenated hydrocarbons, monochlorobenzene, aromatic halogenated hydrocarbons such as dichlorobenzene, diethyl ether, dibutyl ether,
Ethers such as methyl t-butyl ether and tetrahydrofuran, methyl alcohol, ethyl alcohol, n
Alcohols such as -butyl alcohol and mixtures thereof. The amount used is usually the general formula (1)
Is 1 to 200 times by weight, preferably about 3 to 30 times by weight of the Fe compound represented by

The reaction is carried out usually at a temperature of -100 ° C to the boiling point of the solvent, preferably about -20 to 80 ° C.

After the reaction, it can be used, for example, as it is as a solution or slurry, or after the solvent is distilled off.

[Compound (B)] As the compound (B) used in the present invention, the following known organic aluminum compounds can be used. (B1): an organoaluminum compound represented by the general formula (E1) a AlZ (3-a), (B2): a general formula ｛-A
a cyclic aluminoxane having a structure represented by l (E2) -O-｝ b, (B3): a general formula E3 ｛-Al
A linear aluminoxane having a structure represented by (E3) -O-｝ cAl (E3) 2 (wherein E1, E2, E
3 is the same or different and represents a hydrocarbon group having 1 to 8 carbon atoms; Z represents a hydrogen atom or a halogen atom;
Represents an integer of 0 <a ≦ 3, b represents an integer of 2 or more, and c represents an integer of 1 or more. ) Or a mixture of a few of them.

Specific examples of the organoaluminum compound (B1) represented by the general formula (E1) a Al (Z) 3-a include trimethylaluminum, triethylaluminum, tripropylaluminum, triisobutylaluminum and trihexylaluminum. Trialkylaluminum; dialkylaluminum chloride such as dimethylaluminum chloride, diethylaluminum chloride, dipropylaluminum chloride, diisobutylaluminum halide, dihexylaluminum chloride; methylaluminum dichloride;
Examples thereof include alkyl aluminum dichlorides such as ethyl aluminum dichloride, propyl aluminum dichloride, isobutyl aluminum dichloride, and hexyl aluminum dichloride; and dialkyl aluminum hydrides such as dimethyl aluminum hydride, diethyl aluminum hydride, dipropyl aluminum hydride, diisobutyl aluminum hydride, and dihexyl aluminum hydride. be able to. Preferably, a trialkylaluminum is used, and more preferably, triethylaluminum and triisobutylaluminum are used.

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

The above aluminoxane is produced by various methods. There is no particular limitation on the method, and a production method may be used according to a known method. For example, it is produced by bringing a solution in which a trialkylaluminum (for example, trimethylaluminum or the like) is dissolved in a suitable organic solvent (benzene or aliphatic hydrocarbon or the like) into contact with water. In addition, a method in which a trialkylaluminum (for example, trimethylaluminum or the like) is brought into contact with a metal salt containing water of crystallization (for example, copper sulfate hydrate or the like) to produce the same can be exemplified.

[Compound C] In the present invention, compound (C)
(C1) a boron compound represented by the general formula BQ1Q2Q3 (C2) a boron compound represented by the general formula Z ⁺ (BQ1Q2Q3Q4) ^- (C3) a general formula (LH) ⁺ (B
Q1Q2Q3Q4) ^- one of boron compound represented by the used.

In the boron compound (C1) represented by the general formula BQ1Q2Q3, B is a boron atom in a trivalent valence state, Q1 to Q3 are the same or different, halogen atom, 1 to 20 carbon atoms A hydrocarbon group containing 1-2
Halogenated hydrocarbon groups containing 0 carbon atoms, 1-20
A substituted silyl group containing 1 to 20 carbon atoms, an alkoxy group containing 1 to 20 carbon atoms or a disubstituted amino group containing 2 to 20 carbon atoms, which may be the same or different . Preferred Q1 to Q3 are a halogen atom, 1
A hydrocarbon group containing 1 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, most preferably tris (pentafluorophenyl) borane.

The general formula Z⁺(BQ1Q2Q3Q4)^-Represented by
In the boron compound (C2), Z ⁺Is inorganic or organic
Where B is a boron atom in a trivalent state
And Q1 to Q4 are the same as Q1 to Q3 in the above (C1).
The same is true.

The general formula Z ⁺ (BQ1Q2Q3Q4) ^- Examples of compound represented by is an inorganic cation Z ⁺
Include ferrocenium cations, alkyl-substituted ferrocenium cations, silver cations, and the like, and organic cations Z ⁺ include triphenylmethyl cations. (BQ1Q2Q3Q4) ^-, the tetrakis (pentafluorophenyl) borate, tetrakis (2,3,
5,6-tetrafluorophenyl) borate, tetrakis (2,3,4,5-tetrafluorophenyl) borate, tetrakis (3,4,5-trifluorophenyl)
Borate, tetrakis (2,2,4-trifluorophenyl) borate, phenylbis (pentafluorophenyl) borate, tetrakis (3,5-bistrifluoromethylphenyl) borate and the like.

Specific combinations of these include ferrocenium tetrakis (pentafluorophenyl) borate, 1,1'-dimethylferrocenium tetrakis (pentafluorophenyl) borate, silver tetrakis (pentafluorophenyl) borate, Phenylmethyltetrakis (pentafluorophenyl) borate,
Triphenylmethyltetrakis (3,5-bistrifluoromethylphenyl) borate and the like can be mentioned, and most preferred is triphenylmethyltetrakis (pentafluorophenyl) borate.

The formula (LH) ⁺ (BQ1Q2Q3Q)
4) ^- In the boron compound represented (C3), L is a neutral Lewis base, (L-H) ⁺ is a Bronsted acid, B is boron atom in the trivalent valence state ,
Q1 to Q4 are the same as Q1 to Q3 in (C1) above.

The general formula ^{(L-H) + (BQ1Q2Q3Q4} ) - Examples of compound represented by a Bronsted acid (L-H) ⁺ is a trialkyl-substituted ammonium, N, N-dialkyl Anilinium, dialkyl ammonium, triaryl phosphonium and the like,
(BQ1Q2Q3Q4) ^- to include the same as described above.

Specific combinations of these 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. Most preferably, tri (normal butyl) ammonium tetrakis (pentane) Fluorophenyl) borate, N, N
-Dimethylanilinium tetrakis (pentafluorophenyl) borate.

In the present invention, the component (A) obtained by mixing an Fe compound represented by the general formula (1) and a diiminodibenzothiophene compound represented by the general formula (2),
The compound (B) and the compound (C) can be charged and used in an arbitrary order during the polymerization, and a reaction product obtained by previously contacting a combination of these arbitrary compounds may be used.

The amount of each catalyst component used is such that the molar ratio of the Fe compound represented by the general formula (1) / the diiminodibenzothiophene compound represented by the general formula (2) is 0.1 to 10, preferably about 1. The molar ratio of the compound (B) / transition metal compound is from 0.1 to 10,000, preferably from 5 to 2,000, and the molar ratio of the compound (C) / transition metal compound is from 0.01 to 10.
It is desirable to use each component so that it is 0, preferably in the range of about 0.5 to 10.

Hereinafter, the polymerization method of the monomer will be described. In the present invention, the monomer used for polymerization may be any of olefins having 2 to 20 carbon atoms, diolefins and olefins having polar substituents such as carboxylic acids, esters and amino groups. It is possible to use two or more monomers at the same time. Such monomers are exemplified below, but the present invention is not limited to the following compounds. Specific examples of such olefins 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, and diolefin compounds include conjugated dienes and non-conjugated dienes of hydrocarbon compounds. Specific examples of such compounds include non-conjugated dienes. Specific examples of the conjugated diene compound include 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-cyclooctadiene, 5,8
-Endmethylene hexahydronaphthalene and the like. Specific examples of the conjugated diene compound include 1,3-butadiene, isoprene, 1,3-hexadiene, and 1,3-hexadiene.
Octadiene, 1,3-cyclooctadiene, 1,3-
Cyclohexadiene and the like can be exemplified. Specific examples of the olefin having a polar substituent include acrylic acid,
Examples thereof include methyl acrylate, methacrylic acid, methyl methacrylate, and vinyl acetate. Preferably, it is ethylene.

Specific examples of the monomer constituting the copolymer include ethylene and propylene, ethylene and butene-1,
Examples include ethylene and hexene-1, and propylene and butene-1.

The polymerization method is not particularly limited. For example, aliphatic hydrocarbons such as butane, pentane, hexane, heptane and octane, aromatic hydrocarbons such as benzene and toluene, and methylene dichloride and the like can be used. Solvent polymerization using a halogenated hydrocarbon as a solvent, slurry polymerization, gas phase polymerization in a gaseous monomer, and the like are possible, and both continuous polymerization and batch polymerization are possible.

The polymerization temperature can usually range from -50 ° C. to 200 ° C., but is particularly preferably from -20 ° C. to 100 ° C., and the polymerization pressure is from normal pressure to 60 kg / cm 2.
G (6 MPa) is preferred. In general, the polymerization time is appropriately determined depending on the type of the target polymer and the reaction apparatus, but can range from 1 minute to 20 hours. In the present invention, a chain transfer agent such as hydrogen may be added to adjust the molecular weight of the copolymer.

[0041]

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

Example 1 1,8-bis (N-2,6-diisopropylphenyl-
Preparation of formaldimino) -dibenzothiophene / iron dichloride Under a nitrogen atmosphere, 168 mg of 1,8-bis (N-2,6-diisopropylphenyl-formaldimino) -dibenzothiophene was dissolved in 10 ml of methylene chloride, and then dissolved in 10 ml of methylene chloride. 38.0 mg of iron chloride were added. 25 ° C
For 3 days. Then, after concentration under reduced pressure, the obtained solid was washed with 5.0 ml of hexane and dried under reduced pressure to obtain a solid (209 mg). (Polymerization) In a jacketed separable flask, 100 ml of toluene was charged under nitrogen and stabilized at 25 ° C, and then ethylene was bubbled under normal pressure. Here, a hexane solution of triisobutylaluminum (2.08 m
1, 0.96M, Kanto Chemical), solid 3.4 obtained above
mg and dimethylanilinium tetrakispentafluorophenyl borate (12.2 mg) were added, and the mixture was stirred for 1 hour. Thereafter, ethylene was stopped, and a 5% aqueous hydrochloric acid solution was added to stop the polymerization. Methanol was added to the resulting mixture, insolubles were filtered, and dried under reduced pressure to obtain 0.32 g of a polymer. An autoclave with a stirrer having an internal volume of 400 ml was vacuum-dried and replaced with argon,
200 ml of toluene was charged as a solvent, and
The temperature was raised to ° C. After raising the temperature, the ethylene pressure was increased to 3.5 MPa.
After the inside of the system was stabilized, 0.1 mmol of triisobutylaluminum was added, 1 μmol of the solid obtained above was added, and then 3 μm of trityltetrakis (pentafluorophenyl) borate was added.
ol. Polymerization was performed for 60 minutes while controlling the temperature at 40 ° C. As a result of the polymerization, polyethylene was converted to Fe1
3.3 × 10 ⁶ g was produced per mol and per hour.

Example 2 1,8-bis (N-2,6-diisopropylphenyl-
Preparation of formaldimino) -dibenzothiophene / iron dichloride Under a nitrogen atmosphere, 236 mg of 1,8-bis (N-2,6-diisopropylphenyl-formaldimino) -dibenzothiophene was dissolved in 10 ml of methylene chloride, and then dissolved in 10 ml of methylene chloride. 55.1 mg of iron chloride were added. 25 ° C
For 5 days. Thereafter, filtration was performed to remove the supernatant solution, and the residue was dried under reduced pressure to obtain a solid.
(77.7 mg). (Polymerization) In a jacketed separable flask, 100 ml of toluene was charged under nitrogen and stabilized at 25 ° C, and then ethylene was bubbled under normal pressure. Here, a hexane solution of triisobutylaluminum (2.08 m
1, 0.96M, Kanto Chemical), solid 3.4 obtained above
mg and dimethylanilinium tetrakispentafluorophenyl borate (12.2 mg) were added, and the mixture was stirred for 1 hour. Thereafter, ethylene was stopped, and a 5% aqueous hydrochloric acid solution was added to stop the polymerization. Methanol was added to the obtained mixture, the insolubles were filtered, and dried under reduced pressure to obtain 1.18 g of a polymer.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Wataru Hirahata 5-1, Anesaki Beach, Ichihara City, Chiba Prefecture Sumitomo Chemical Co., Ltd. F term (reference) 4J028 AA01A AB00A AC46A BA00A BA01A BA02B BA03B BA04B BB00A BB01B BB02B BB03B BC12B BC15B BC16B BC17B BC18B BC25B BC40A CB85A EA01 EB02 EB03 EB04 EB05 EB07 EB08 EB09 EB12 EB13 EB14 EB15 EB16 EB18 EB24 EB25 EC01 EC02 FA01 FA02 FA04 FA07

Claims (2)

[Claims] An olefin polymerization catalyst comprising the following component (A), compound (B) and compound (C). (A) General formula (1) MX _m L _n (where M represents Fe, X represents a halogen atom, L
Represents an organic ligand, and m and n each represent an integer of 0 to 6. An iron compound represented by the general formula (2): (Wherein, R ¹ represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 20 carbon atoms. R ²
Represents an aryl group having 6 to 20 carbon atoms. Compound (B): Any of the following compounds (B1) to (B3), or a mixture of two or three of them (B1): General formula (E1) a organoaluminum compound represented by Al (Z) 3-a; (B2): a cyclic aluminoxane having a structure represented by the general formula ｛-Al (E2) -O-｝ b; (B3): general Formula (E3) {-Al (E3) -O-}
c Linear aluminoxane having a structure represented by Al (E3) 2 (where E1 to E3 are the same or different and have 1 to 8 carbon atoms)
Z is the same or different and represents a hydrogen atom or a halogen atom, a represents an integer of 0 <a ≦ 3, b represents an integer of 2 or more, and c represents an integer of 1 or more. Compound (C): any of the following compounds (C1) to (C3) (C1): a boron compound represented by the general formula BQ1 Q2 Q3, (C2): a general formula Z ⁺ (BQ1 Q2 Q3 Q4)-
A boron compound represented by the formula: (C3): General formula (LH) ⁺ (BQ1 Q2 Q3 Q
4) ^- boron compound represented by (wherein ,, B is a boron atom in the trivalent valence state,
Q1 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 substituted silyl group having 1 to 20 carbon atoms,
It represents 20 alkoxy groups or a disubstituted amino group having 2 to 20 carbon atoms. ). 2. A method for producing an olefin polymer, comprising polymerizing an olefin in the presence of the catalyst for olefin polymerization according to claim 1.