JP2018188639A - Method for producing olefin polymer and olefin polymer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing an olefin polymer capable of narrowing the molecular weight distribution while maintaining a long-chain branched structure characteristic of an olefin polymer.SOLUTION: There is provided a method for producing an olefin polymer which is carried out by supplying an olefin polymerization catalyst containing the following (A) and (B) and (D) so that the following (1) to (3) are satisfied, wherein the supply amount ratio (mol/mol) of (D) to (A) is set to 1.5 to 100 times the ratio in the following (1). (A) a crosslinked biscyclopentadienyl compound containing a transition metal element Msuch as Ti, Zr and Hf, (B) a compound which is reacted with (A) to generate a cationic metallocene compound, (D) : formula ML(Mrepresents a typical metal atom of group I, II or XII to XV, Lrepresents H, X or a hydrocarbon group), (1) the ratio of Mto Mis 85 to 130, (2) the ratio (μ mol/kg) of Mto the polymerization medium is 0.001 to 12, (3) the ratio (m mol/kg) of Mto the polymerization medium is 0.01 to 20.SELECTED DRAWING: None

Description

  The present invention relates to a method for producing an olefin polymer, and an olefin polymer. More specifically, the present invention relates to an olefin polymer production method capable of narrowing the molecular weight distribution by adjusting the supply amount of a specific component during polymerization, and an olefin polymer obtained by this production method.

As a method to improve the molding processability of metallocene polyolefins generally lacking in moldability, high-pressure low-density polyethylene is blended with metallocene polyolefins, and long chain branching is performed on polyolefins by polymerization using specific metallocenes. The method of introduction is known. The former requires a blending process and thus increases the manufacturing cost. Moreover, although the obtained blend is excellent in molding processability, the mechanical strength, which is an advantage of the metallocene-based polyolefin, is lowered.
On the other hand, a method using a bridged pentadienylindenyl compound as a specific metallocene catalyst for introducing the latter long-chain branch is known (see Patent Documents 1 to 3). When these metallocene catalysts are used, it is possible to produce an olefin polymer having a long chain branched structure. However, in this method, the molecular weight distribution of the polymer tends to be widened, so that an excellent molding process may occur due to a fracture of the molten resin, a poor appearance due to rough surface elasticity, and a deterioration in mechanical strength due to melt orientation. Is still not enough to achieve both product and product characteristics. Therefore, there is a demand for a production method that can produce an olefin polymer having a narrow molecular weight distribution without changing the long-chain branched structure characteristics of the produced polymer.

JP 2013-227271 A Japanese Patent Laid-Open No. 2017-020019 JP 2006-017039 A

An object of the present invention is to provide a method for producing an olefin polymer capable of narrowing the molecular weight distribution while maintaining the long-chain branched structure characteristics of the olefin polymer.
Another object of the present invention is to provide an olefin polymer having a narrow molecular weight distribution while maintaining long-chain branched structure characteristics.

  As a result of intensive studies to solve the above problems, the present inventors have found that the molecular weight distribution can be narrowed by adjusting the supply amount of a specific component during polymerization. It came to complete.

That is, according to the first invention of the present invention, an olefin polymerization catalyst containing the following essential components (A) and (B) and the following component (D) in a polymerization reactor in which an olefin monomer and a polymerization medium are present, and the following conditions: A method for producing an olefin polymer having a long-chain branched structure that is supplied so as to satisfy (1) to (3), wherein the ratio of the component (D) to the component (A) (mol / mol) is 1.5 to 100 times the ratio (mol / mol) in the following condition (1), which is a method for producing an olefin polymer having a narrow molecular weight distribution.
However, the following condition (1) is: “The supply ratio (mol / mol) of the component (D) to the component (A) is 1.5 to 100 times the ratio (mol / mol) in the following condition (1)”. It is a precondition used in the calculation of the requirement “double”, and it is not necessary to satisfy the condition (1) alone.

Component (A): Bridged biscyclopentadienyl compound represented by the following general formula (1) containing a transition metal element M ¹

[In the formula (1), M ¹ represents a transition metal of Ti, Zr or Hf. X ¹ and X ² each independently represent a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a hydrocarbon group having 1 to 20 carbon atoms including an oxygen atom or a nitrogen atom, or 1 to 20 carbon atoms. A hydrocarbon group-substituted amino group or an alkoxy group having 1 to 20 carbon atoms. Q ¹ and Q ² each independently represent a carbon atom, a silicon atom or a germanium atom. R ¹ each independently represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, and at least two of the four R ¹ are bonded to form a ring together with Q ¹ and Q ^2. May be. m is 0 or 1, and when m is 0, Q ¹ is directly bonded to a conjugated 5-membered ring containing R ² and R ³ . R ² and R ³ are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing hydrocarbon group having 1 to 18 carbon atoms including 1 to 6 silicon atoms, or a carbon number. 1 to 20 halogen-containing hydrocarbon group, a C1-C40 hydrocarbon group containing an oxygen atom or a sulfur atom, or a C1-C40 hydrocarbon group-substituted silyl group. Of R ² and R ^3, or a pair of R ² and R ³ wherein R ³ to each other or adjacent neighboring alone may form a ring together with the carbon atom bonded. ]

Component (B): a compound that reacts with the compound of component (A) to form a cationic metallocene compound

Component (D): Compound represented by the general formula M ² L ¹ _n (M ² represents a typical metal atom of Group 1, Group 2 or Group 12-15 of the Periodic Table;
L ¹ is a hydrogen atom, a halogen atom, or a hydrocarbon group,
n is a number corresponding to the valence of M ² )

Condition (1) The ratio of M ^{2 to} M ¹ (mol / mol) is 85 to 130.
Condition (2) The ratio of M ^{1 to} the polymerization medium (μmol / kg) is 0.001 to 12
Condition (3) The ratio of M ^{2 to} the polymerization medium (mmol / kg) is 0.01-20.

According to a second aspect of the present invention, an olefin polymerization catalyst containing the following essential components (A) and (B) and the following component (D) are added to a polymerization reactor in which an olefin monomer and a polymerization medium are present, under the following conditions (1a ) To (3a), and a method for producing an olefin polymer having a long-chain branched structure.

Component (A): Bridged biscyclopentadienyl compound represented by the following general formula (1) containing a transition metal element M ¹

[In the formula (1), M ¹ represents a transition metal of Ti, Zr or Hf. X ¹ and X ² each independently represent a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a hydrocarbon group having 1 to 20 carbon atoms including an oxygen atom or a nitrogen atom, or 1 to 20 carbon atoms. A hydrocarbon group-substituted amino group or an alkoxy group having 1 to 20 carbon atoms. Q ¹ and Q ² each independently represent a carbon atom, a silicon atom or a germanium atom. R ¹ each independently represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, and at least two of the four R ¹ are bonded to form a ring together with Q ¹ and Q ^2. May be. m is 0 or 1, and when m is 0, Q ¹ is directly bonded to a conjugated 5-membered ring containing R ² and R ³ . R ² and R ³ are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing hydrocarbon group having 1 to 18 carbon atoms including 1 to 6 silicon atoms, or a carbon number. 1 to 20 halogen-containing hydrocarbon group, a C1-C40 hydrocarbon group containing an oxygen atom or a sulfur atom, or a C1-C40 hydrocarbon group-substituted silyl group. Of R ² and R ^3, or a pair of R ² and R ³ wherein R ³ to each other or adjacent neighboring alone may form a ring together with the carbon atom bonded. ]

Component (B): a compound that reacts with the compound of component (A) to form a cationic metallocene compound

Component (D): Compound represented by the general formula M ² L ¹ _n (M ² represents a typical metal atom of Group 1, Group 2 or Group 12-15 of the Periodic Table;
L ¹ is a hydrogen atom, a halogen atom, or a hydrocarbon group,
n is a number corresponding to the valence of M ² )

Condition (1a) The ratio of M ^{2 to} M ¹ (mol / mol) is 130 to 10,000.
Condition (2a) The ratio of M ^{1 to} the polymerization medium (μmol / kg) is 0.001 to 10
Condition (3a) The ratio of M ^{2 to} the polymerization medium (mmol / kg) is 0.05 to 20

According to a third aspect of the present invention, there is provided the method for producing an olefin polymer according to the first or second aspect, wherein the obtained olefin polymer satisfies the following physical properties (i) and (ii). is there.

Physical Properties (i) Olefin obtained when the value of molecular weight distribution (Mw / Mn) measured by gel permeation chromatography (GPC) and the supply ratio of component (D) to component (A) are not increased The ratio ([Mw / Mn] / [Mw ₀ / Mn ₀ ]) to the value of the molecular weight distribution (Mw ₀ / Mn ₀ ) of the polymer is 0.50 to 0.95.

Physical Properties (ii) A value (g ′ _m ) at a molecular weight of 100,000 of a branching index g ′ measured by a GPC measuring device combining a differential refractometer, a viscosity detector, and a light scattering detector, and the above component (A ) The ratio of the branching index g ′ of the olefin polymer obtained in the case of not increasing the supply ratio of the component (D) to the molecular weight (g ′ _m0 ) of the olefin polymer (g ′ _m / g ′ _m0 ) Is 0.90 to 1.10.

According to a fourth aspect of the present invention, there is provided the production of the olefin polymer according to any one of the first to third aspects, wherein the obtained olefin polymer satisfies the following physical properties (iii) and (iv): Is the method.

Physical Properties (iii) The Mw / Mn is 2.0 to 7.0.
Physical Properties (iv) The g ′ _m is 0.50 to 0.95.

  A fifth invention of the present invention is the method for producing an olefin polymer according to any one of the first to fourth inventions, wherein the olefin monomer is ethylene.

A sixth invention of the present invention is the method for producing an olefin polymer according to the fifth invention, wherein the obtained olefin polymer satisfies the following physical properties (v) and (vi).
Physical property (v) MFR is 0.001-1000 g / 10min.
Physical Properties (vi) The density is 0.895-0.970 g / cm ³ .

  A seventh invention of the present invention is the process for producing an olefin polymer according to any one of the first to sixth inventions, wherein the polymerization medium is a hydrocarbon solvent or a polyolefin (particles or pellets). is there.

  The eighth invention of the present invention is the method for producing an olefin polymer according to any one of the first to seventh inventions, wherein the polymerization reactor is a slurry polymerization reactor or a gas phase polymerization reactor. It is.

  A ninth invention of the present invention is the method for producing an olefin polymer according to any one of the first to eighth inventions, wherein the polymerization reaction is performed at a temperature of 60 to 110 ° C.

  According to a tenth aspect of the present invention, in the method for producing an olefin polymer according to any one of the first to ninth aspects, the polymerization reaction is performed at an olefin partial pressure of 0.2 to 1.9 MPa. is there.

In an eleventh aspect of the present invention, any one of the first to tenth aspects, wherein the component (D) is represented by the general formula AlL ¹ ₃ (L ¹ is a hydrogen atom, a halogen atom, or a hydrocarbon group). It is a manufacturing method of the olefin polymer as described in invention of this.

  A twelfth aspect of the present invention is the olefin polymer according to any one of the first to eleventh aspects, wherein the olefin polymerization catalyst further contains an inorganic compound carrier (component (C)). It is a manufacturing method.

  A thirteenth aspect of the present invention is an olefin polymer obtained by the method for producing an olefin polymer according to any one of the first to twelfth aspects.

According to the method for producing an olefin polymer of the present invention, the molecular weight distribution can be narrowed while maintaining the long-chain branched structure characteristics of the olefin polymer.
The olefin polymer of the present invention has a narrow molecular weight distribution while maintaining long-chain branched structure characteristics.

It is a graph which shows the base line and area of a chromatogram used by the gel permeation chromatography (GPC) method. It is a graph which shows the relationship between the branch index (g ') computed from GPC-VIS measurement (branch structure analysis), and molecular weight (M).

  Below, the manufacturing method of the olefin polymer of this invention is demonstrated concretely and in detail for every item.

1. Production method of olefin polymer (first production method)
(1) Method for Producing Olefin Polymer The method for producing an olefin polymer of the present invention comprises an olefin polymerization catalyst containing the following essential components (A) and (B) in a polymerization reactor in which an olefin monomer and a polymerization medium are present: This is a method for producing an olefin polymer having a long-chain branched structure, which is carried out by supplying the following component (D) so as to satisfy the following conditions (1) to (3). The supply amount ratio (mol / mol) of the component (D) to the component (A) is 1.5 to 100 times the ratio (mol / mol) in the following condition (1). This feature is also called a characteristic requirement.

Component (A): Bridged biscyclopentadienyl compound represented by the following general formula (1) containing a transition metal element M ¹

[In the formula (1), M ¹ represents a transition metal of Ti, Zr or Hf. X ¹ and X ² each independently represent a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a hydrocarbon group having 1 to 20 carbon atoms including an oxygen atom or a nitrogen atom, or 1 to 20 carbon atoms. A hydrocarbon group-substituted amino group or an alkoxy group having 1 to 20 carbon atoms. Q ¹ and Q ² each independently represent a carbon atom, a silicon atom or a germanium atom. R ¹ each independently represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, and at least two of the four R ¹ are bonded to form a ring together with Q ¹ and Q ^2. May be. m is 0 or 1, and when m is 0, Q ¹ is directly bonded to a conjugated 5-membered ring containing R ² and R ³ . R ² and R ³ are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing hydrocarbon group having 1 to 18 carbon atoms including 1 to 6 silicon atoms, or a carbon number. 1 to 20 halogen-containing hydrocarbon group, a C1-C40 hydrocarbon group containing an oxygen atom or a sulfur atom, or a C1-C40 hydrocarbon group-substituted silyl group. Of R ² and R ^3, or a pair of R ² and R ³ wherein R ³ to each other or adjacent neighboring alone may form a ring together with the carbon atom bonded. ]

Component (B): a compound that reacts with the compound of component (A) to form a cationic metallocene compound

Component (D): Compound represented by the general formula M ² L ¹ _n (M ² represents a typical metal atom of Group 1, Group 2 or Group 12-15 of the Periodic Table;
L ¹ is a hydrogen atom, a halogen atom, or a hydrocarbon group,
n is a number corresponding to the valence of M ² )

Condition (1) The ratio of M ^{2 to} M ¹ (mol / mol) is 85 to 130.
Condition (2) The ratio of M ^{1 to} the polymerization medium (μmol / kg) is 0.001 to 12
Condition (3) The ratio of M ^{2 to} the polymerization medium (mmol / kg) is 0.01-20.

(2) Olefin monomer The olefin monomer is not particularly limited, and examples thereof include ethylene and other α-olefins. The method for producing an olefin polymer of the present invention can be suitably used for either homopolymerization of ethylene or copolymerization of ethylene and an α-olefin.
The α-olefins as comonomers include those having 3 to 30 carbon atoms, preferably 3 to 8 carbon atoms. Specifically, propylene, 1-butene, 1-hexene, 1-octene, 4-methyl- Examples include 1-pentene and the like. As for the α-olefins, two or more types of α-olefins can be copolymerized with ethylene. The copolymerization may be any of alternating copolymerization, random copolymerization, and block copolymerization. When ethylene and another α-olefin are copolymerized, the amount of the other α-olefin can be arbitrarily selected within a range of 90 mol% or less of the total monomers, but generally 40 mol%. In the following, it is preferably selected in the range of 30 mol% or less, more preferably 10 mol% or less. Of course, a small amount of a comonomer other than ethylene or α-olefin can be used. In this case, styrenes such as styrene, 4-methylstyrene, 4-dimethylaminostyrene, 1,4-butadiene, 1,5- It has polymerizable double bonds such as dienes such as hexadiene, 1,4-hexadiene and 1,7-octadiene, cyclic compounds such as norbornene and cyclopentene, oxygen-containing compounds such as hexenol, hexenoic acid and methyl octenoate. A compound can be mentioned.

(3) Polymerization medium A conventionally known polymerization medium can be used and is not particularly limited. A hydrocarbon solvent or polyolefin (particles or pellets) is preferably used.
As the hydrocarbon solvent, conventionally known solvents can be used, for example, propane, n-butane, isobutane, n-pentane, isopentane, n-hexane, isohexane, heptane, octane, decane, dodecane, cyclohexane, etc. Although it is a mixture classified as an inert hydrocarbon such as linear, branched or cyclic hydrocarbons, benzene, toluene, xylene, liquid paraffins, isoparaffinic solvents, mixed aliphatic hydrocarbon solvents For example, commercially available products such as IP solvent, ISOPAR, kerosene, etc. may be used alone or as a mixture, and α-olefins such as liquefied ethylene, liquefied propylene, 1-butene, 1-hexene, 1-octene, etc. , Aromatic monomers such as styrene, 2-butene, cyclopentene, etc. Liquid monomer such as fins monomers can also be used. Among these, linear, branched or cyclic hydrocarbons such as propane, n-butane, isobutane, n-pentane, isopentane, n-hexane, isohexane, heptane, octane, decane, dodecane, cyclopentane, cyclohexane, Commercially available products such as liquid paraffins, isoparaffinic solvents, mixed solvents classified as mixed aliphatic hydrocarbon solvents, such as IP solvent, ISOPAR, liquefied ethylene, liquefied propylene, 1-butene, 1-hexene, 1-octene An α-olefin such as a single compound or a mixture thereof is preferably used. Propane, n-butane, isobutane, n-pentane, isopentane, n-hexane, isohexane, heptane, octane, decane, dodecane, cyclopentane, cyclohexane, IP solvent, ISOPAR, liquefied ethylene, liquefied propylene, 1-butene, 1- Hexene, 1-octene alone or a mixture thereof is more preferably used, and isobutane, isopentane, n-hexane, isohexane, heptane, cyclopentane, cyclohexane, IP solvent, ISOPAR alone or a mixture thereof is more suitably used.
As the polyolefin, conventionally known ones can be used. For example, polyethylene (ethylene homopolymer or copolymer with other monomers. The same applies to the following polyolefin), polypropylene, polybutene, polyhexene, Polyisobutene, polystyrene, and the like are preferably used, but it is more preferably a polyolefin containing an olefin copolymer obtained by copolymerizing the same type of comonomer as the olefin polymer to be produced, and the shape thereof is a so-called obtained from a polymerization reactor. The polymer particles (also referred to as polymer powder or polymer granules) or so-called pellets obtained through a melt kneader may be used, but the polymer particles are preferred, and the polymer having an average particle size of about 100 to 3000 μm. More preferably, it is a particle.

(4) Component (A)
Component (A) is a crosslinked biscyclopentadienyl compound represented by the following general formula (1) containing a transition metal element M ^1.

[In the formula (1), M ¹ represents a transition metal of Ti, Zr or Hf. X ¹ and X ² each independently represent a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a hydrocarbon group having 1 to 20 carbon atoms including an oxygen atom or a nitrogen atom, or 1 to 20 carbon atoms. A hydrocarbon group-substituted amino group or an alkoxy group having 1 to 20 carbon atoms. Q ¹ and Q ² each independently represent a carbon atom, a silicon atom or a germanium atom. R ¹ each independently represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, and at least two of the four R ¹ are bonded to form a ring together with Q ¹ and Q ^2. May be. m is 0 or 1, and when m is 0, Q ¹ is directly bonded to a conjugated 5-membered ring containing R ² and R ³ . R ² and R ³ are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing hydrocarbon group having 1 to 18 carbon atoms including 1 to 6 silicon atoms, or a carbon number. 1 to 20 halogen-containing hydrocarbon group, a C1-C40 hydrocarbon group containing an oxygen atom or a sulfur atom, or a C1-C40 hydrocarbon group-substituted silyl group. Of R ² and R ^3, or a pair of R ² and R ³ wherein R ³ to each other or adjacent neighboring alone may form a ring together with the carbon atom bonded. ]

In the general formula (1), M ¹ of the metallocene compound represents Ti, Zr or Hf, M ^{1 of the} metallocene compound preferably represents Zr or Hf, and M ^{1 of the} metallocene compound more preferably represents Zr. Represent. X ¹ and X ² are each independently a hydrogen atom, a chlorine atom, a bromine atom, an iodine atom, or a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, i -Butyl group, t-butyl group, n-pentyl group, neopentyl group, cyclopentyl group, n-hexyl group, cyclohexyl group, phenyl group, benzyl group, methoxymethyl group, ethoxymethyl group, n-propoxymethyl group, i- Propoxymethyl group, n-butoxymethyl group, i-butoxymethyl group, t-butoxymethyl group, methoxyethyl group, ethoxyethyl group, acetyl group, 1-oxopropyl group, 1-oxo-n-butyl group, 2- Methyl-1-oxopropyl group, 2,2-dimethyl-1-oxo-propyl group, phenylacetyl group, diphenylacetyl group, Zoyl, 2-methoxyphenyl, 3-methoxyphenyl, 4-methoxyphenyl, 2-furyl, 2-tetrahydrofuryl, dimethylaminomethyl, diethylaminomethyl, di-propylaminomethyl, bis (Dimethylamino) methyl group, bis (dii-propylamino) methyl group, (dimethylamino) (phenyl) methyl group, methylimino group, ethylimino group, 1- (methylimino) ethyl group, 1- (phenylimino) ethyl group 1-[(phenylmethyl) imino] ethyl group, methoxy group, ethoxy group, n-propoxy group, i-propoxy group, n-butoxy group, i-butoxy group, t-butoxy group, phenoxy group, dimethylamino group Diethylamino group, di-n-propylamino group, di-i-propylamino group, di-n-butyla Examples thereof include a mino group, a dii-butylamino group, a di-t-butylamino group, and a diphenylamino group.
Specific examples of preferred X ¹ and X ² include chlorine atom, bromine atom, methyl group, n-butyl group, i-butyl group, methoxy group, ethoxy group, i-propoxy group, n-butoxy group, phenoxy group, Examples thereof include a dimethylamino group and a di i-propylamino group. Among these specific examples, a chlorine atom, a methyl group, and a dimethylamino group are particularly preferable.

Q ¹ and Q ² represent a carbon atom, a silicon atom or a germanium atom. Preferably they are a carbon atom or a silicon atom. More preferably, it is a silicon atom.
Further, each R ¹ is independently a hydrogen atom, methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, t-butyl group, or n-pentyl group. , Neopentyl group, cyclopentyl group, n-hexyl group, cyclohexyl group, phenyl group and the like. Further, when R ¹ forms a ring together with Q ¹ and Q ² , a cyclobutylidene group, a cyclopentylidene group, a cyclohexylidene group, a silacyclobutyl group, a silacyclopentyl group, a silacyclohexyl group, etc. Is mentioned.
Specific examples of preferable R ¹ include a hydrogen atom, a methyl group, an ethyl group, a phenyl group, an ethylene group, and a cyclobutylidene group when Q ¹ or / and Q ² are carbon atoms, and Q ¹ or / When Q ² is a silicon atom, examples thereof include a methyl group, an ethyl group, a phenyl group, and a silacyclobutyl group.

m is 0 or 1, and when m is 0, Q ¹ is directly bonded to a conjugated 5-membered ring containing R ² and R ³ .

R ² and R ³ are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing hydrocarbon group having 1 to 18 carbon atoms including 1 to 6 silicon atoms, or a carbon number. 1 to 20 halogen-containing hydrocarbon group, a C1-C40 hydrocarbon group containing an oxygen atom or a sulfur atom, or a C1-C40 hydrocarbon group-substituted silyl group.
Preferred examples of R ² and R ³ include hydrogen atom, methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, t-butyl group, n-pentyl group, n-hexyl. Group, cyclohexyl group, phenyl group, 2-methylfuryl group, and trimethylsilyl group. Among these specific examples, a hydrogen atom, a methyl group, an n-butyl group, a t-butyl group, a phenyl group, and a trimethylsilyl group are more preferable, and a hydrogen atom, a methyl group, a t-butyl group, a phenyl group, and a trimethylsilyl group are particularly preferable. preferable.
Of R ² and R ^3, or a pair of R ² and R ³ wherein R ³ to each other or adjacent neighboring alone may form a ring together with the carbon atom bonded.

  The component (A) is preferably m = 0 in the general formula (1), and more specifically, the following general formula (2) is more preferable.

Here, M ¹ , X ¹ , X ² , Q ¹ , R ¹ , R ² , R ³ follow the description of the general formula (1). It is preferable that adjacent R ³ form a 5- to 7-membered ring structure together with carbon atoms bonded to each other, specifically, a 5-membered ring structure such as a thiophene ring and a pyrrole ring, a benzene ring, a cyclohexene ring, It is more preferable to form a 6-membered ring structure such as a cyclohexane ring and a 7-membered ring structure such as a heptadiene ring, and it is a benzene ring, that is, a bridged cyclopentadienyl / indenyl compound represented by the following general formula (3) Is more preferable.

Here, M ¹ , X ¹ , X ² , Q ¹ , R ¹ , R ² follow the description of the general formula (1). R ³¹ , R ³² , R ³³ and R ³⁴ are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, or a silicon-containing hydrocarbon having 1 to 18 carbon atoms including 1 to 6 silicon atoms. Group, a C1-C20 halogen-containing hydrocarbon group, an oxygen atom, a nitrogen atom or a sulfur atom-containing hydrocarbon group or a C1-C40 hydrocarbon group-substituted silyl group. R ³¹ , R ³² , R ³³ , and R ³⁴ may form a ring together with the adjacent carbon atoms that are bonded to each other.

In the general formula (2), as specific examples in the case where R ² and R ³ do not form a ring, M ¹ , X ¹ , X ² , Q ¹ , R ¹ , R of the following general formula (2 ′) ² , R ² ′, R ³ , R ³ ′ can include compounds described in the following table. However, the component (A) is not limited to these.

In the general formula (2), as an example in which R ² and R ³ form a ring, dimethylsilylene (4-methyl-5-phenyl-cyclopentathiophene) (cyclopentadienyl) zirconium dichloride, dimethylsilylene ( 3-methyl-5- (5-methyl-2-furyl) -cyclopentathiophene) (cyclopentadienyl) zirconium dichloride, dimethylsilylene (2-methyl-4-phenyl-4H-azurenyl) (cyclopentadienyl) Zirconium dichloride and the like.

Examples of the known bridged cyclopentadienyl / indenyl compound contained in the general formula (3) include all exemplified compounds in JP2011-137146A, and [Chemical Formula 1] in JP2013-227271A. in all exemplified compounds when the ^{R 4c} = H, in JP publication No. 2014-70029 [formula 1] general formula (1) All exemplified compounds when the ^R 4 = H, in JP 2015-63515 [ Embedded image All exemplified compounds in the case where R ⁵ = H in the general formula (1), and all examples in the case where R ^{7 to} R ¹⁰ are all H in the general formula (1) of JP-A-2015-172037. Compounds, [Chemical Formula 1] of Japanese Patent Application Laid-Open No. 2012-25664, all exemplified compounds in the case where R ^{11 to} R ¹⁴ are all H in General Formula (1), and [Chemical Formula 1] of Japanese Patent Application Laid-Open Publication No. ) in place of ^R 8 ^{to R 11} all H All exemplified compounds of JP publication No. 2016-145190 [Formula 1] All exemplified compounds when the ^R 8 ^{to R 11} all H in the general formula (1), and the like.

  All the exemplified compounds of JP2011-137146A are specifically the compounds listed below. Dimethylsilylene (cyclopentadienyl) (indenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (indenyl) zirconium dimethyl, dimethylsilylene (cyclopentadienyl) (indenyl) zirconium diphenyl, isopropylidene (cyclopentadienyl) (Indenyl) zirconium dichloride, silacyclobutyl (cyclopentadienyl) (indenyl) zirconium dichloride, silacyclopentyl (cyclopentadienyl) (indenyl) zirconium dichloride, silacyclohexyl (cyclopentadienyl) (indenyl) zirconium dichloride, cyclo Butylidene (cyclopentadienyl) (indenyl) zirconium dichloride, cyclopentylidene (cyclopentadienyl) (Indenyl) zirconium dichloride, cyclohexylidene (cyclopentadienyl) (indenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-methylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3- Methylindenyl) zirconium dimethyl, isopropylidene (cyclopentadienyl) (3-methylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-ethylindenyl) zirconium dichloride, isopropylidene (cyclopentadienyl) ) (3-ethylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-n-propylindenyl) zirconium dichloride, isopropylide (Cyclopentadienyl) (3-n-propylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-i-propylindenyl) zirconium dichloride, isopropylidene (cyclopentadienyl) (3-i -Propylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-n-butylindenyl) zirconium dichloride, isopropylidene (cyclopentadienyl) (3-n-butylindenyl) zirconium dichloride, dimethylsilylene (Cyclopentadienyl) (3-t-butylindenyl) zirconium dichloride, cyclobutylidenecyclopentadienyl) (3-t-butylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadiene) Nyl) (3-t-butylindenyl) zirconium dimethyl, isopropylidene (cyclopentadienyl) (3-t-butylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-n-pentylindenyl) ) Zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-n-hexylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-cyclohexylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-phenylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-benzylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-triruyl) (Denyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-trimethylsilylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-chlorophenylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) ( 3-fluorophenylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (4-methylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (5-methylindenyl) zirconium dichloride, dimethylsilylene (cyclohexane) Pentadienyl) (6-methylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3,4-dimethylindenyl) zirco Umujikurorido, dimethylsilylene (cyclopentadienyl) (3-t-butyl-4-methylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (4-phenyl indenyl) zirconium dichloride,

  Dimethylgermylene (cyclopentadienyl) (indenyl) zirconium dichloride, dimethylgermylene (cyclopentadienyl) (3-methylindenyl) zirconium dichloride, dimethylgermylene (cyclopentadienyl) (3-ethylindenyl) Zirconium dichloride, dimethylgermylene (cyclopentadienyl) (3-i-propylindenyl) zirconium dichloride, dimethylgermylene (cyclopentadienyl) (3-n-butylindenyl) zirconium dichloride, dimethylgermylene (cyclo Pentadienyl) (3-t-butylindenyl) zirconium dichloride, diethylsilylene (cyclopentadienyl) (indenyl) zirconium dichloride, diethylsilylene (cyclopentadienyl) (3 Methylindenyl) zirconium dichloride, diethylsilylene (cyclopentadienyl) (3-ethylindenyl) zirconium dichloride, diethylsilylene (cyclopentadienyl) (3-i-propylindenyl) zirconium dichloride, diethylsilylene (cyclopenta) Dienyl) (3-n-butylindenyl) zirconium dichloride, diethylsilylene (cyclopentadienyl) (3-t-butylindenyl) zirconium dichloride, di-n-butylsilylene (cyclopentadienyl) (indenyl) zirconium Dichloride, di-n-butylsilylene (cyclopentadienyl) (3-methylindenyl) zirconium dichloride, di-n-butylsilylene (cyclopentadienyl) (3-ethylindenyl) zirconium di Loride, di-n-butylsilylene (cyclopentadienyl) (3-i-propylindenyl) zirconium dichloride, di-n-butylsilylene (cyclopentadienyl) (3-n-butylindenyl) zirconium dichloride, di-n -Butylsilylene (cyclopentadienyl) (3-tert-butylindenyl) zirconium dichloride,

  Diphenylsilylene (cyclopentadienyl) (indenyl) zirconium dichloride, diphenylmethylene (cyclopentadienyl) (indenyl) zirconium dichloride, diphenylsilylene (cyclopentadienyl) (3-methylindenyl) zirconium dichloride, diphenylsilylene (cyclo Pentadienyl) (3-ethylindenyl) zirconium dichloride, diphenylsilylene (cyclopentadienyl) (3-i-propylindenyl) zirconium dichloride, diphenylsilylene (cyclopentadienyl) (3-n-butylindenyl) ) Zirconium dichloride, diphenylsilylene (cyclopentadienyl) (3-tert-butylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) ( Nzo [e] indenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (dibenzoindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (azurenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (4 -Methylazurenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (4-phenylazurenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (5,6-dimethylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadiyl) Enyl) (benzo [f] indenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (6,7-dihydroindacenyl) zirconium dichloride Dimethylsilylene (cyclopentadienyl) (5,5,7,7-tetramethyl-6,7-dihydroindacenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (5,6,7,8- Tetrahydrobenzo [f] indenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (5,6,7,8-tetrahydro-5,5,8,8-tetramethylbenzo [f] indenyl) zirconium dichloride.

Moreover, the compound which replaced the zirconium of the said compound with titanium or hafnium, etc. are mentioned.
Furthermore, when using these metallocene compounds as the essential component (A), two or more kinds can be used.

Among the specific compounds exemplified above, those preferable as the metallocene compound as the essential component (A) are shown below.
That is, dimethylsilylene (cyclopentadienyl) (indenyl) zirconium dimethyl, isopropylidene (cyclopentadienyl) (indenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-methylindenyl) zirconium dichloride, dimethylsilylene (Cyclopentadienyl) (3-methylindenyl) zirconium dimethyl, isopropylidene (cyclopentadienyl) (3-methylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-n-butylindenyl) ) Zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-phenylindenyl) zirconium dichloride, isopropylidene (cyclopentadienyl) (3-n-butyli) Denyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-t-butylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-t-butylindenyl) zirconium dimethyl, dimethylsilylene (cyclopenta) Dienyl) (4-phenylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (benzo [e] indenyl) zirconium dichloride, isopropylidene (cyclopentadienyl) (3-t-butylindenyl) zirconium dichloride , Cyclobutylidenecyclopentadienyl) (3-t-butylindenyl) zirconium dichloride, dimethylgermylene (cyclopentadienyl) (indenyl) zirconium dichloride, dipheni Silylene (cyclopentadienyl) (indenyl) zirconium dichloride, diphenylmethylene (cyclopentadienyl) (indenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (azurenyl) zirconium dichloride, and zirconium of the above compound are replaced with titanium or Preferred examples include compounds in place of hafnium.

Among the specific compounds exemplified above, particularly preferable metallocene compounds as the essential component (A) are shown below.
Isopropylidene (cyclopentadienyl) (indenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-methylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (3-phenylindenyl) zirconium dichloride, Dimethylsilylene (cyclopentadienyl) (4-phenylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (benzo [e] indenyl) zirconium dichloride, isopropylidene (cyclopentadienyl) (3-methylindenyl) ) Zirconium dichloride, isopropylidene (cyclopentadienyl) (3-t-butylindenyl) zirconium dichloride, dimethylgermylene (cyclopentadienyl) (indene ) Zirconium dichloride, cyclobutylidene (cyclopentadienyl) (3-tert-butylindenyl) zirconium dichloride, dimethylsilylene (cyclopentadienyl) (indenyl) hafnium dichloride, dimethylsilylene (cyclopentadienyl) (3) -Methylindenyl) hafnium dichloride, dimethylsilylene (cyclopentadienyl) (3-t-butylindenyl) hafnium dichloride, and the like.

JP 2013-227271 Patent compounds publications, specifically, the total exemplified compounds in the case of ^{R 4c} = H the following general formula (1c).

Specifically, the compounds described in JP-A-2014-70029 are all exemplified compounds when R ⁴ = H in the following general formula (1).

Specifically, the compounds described in JP-A-2015-63515 are all exemplified compounds in the case of R ⁵ = H in the following general formula (1).

Specifically, the compounds disclosed in JP-A-2015-172037 are all exemplified compounds in the case where R ^{7 to} R ¹⁰ are all H in the following general formula (1).

Specifically, the compounds described in JP 2012-25664 A are all exemplified compounds in the case where all of R ^{11 to} R ¹⁴ are H in the following general formula (1).

Specifically, the compounds disclosed in JP-A-2006-141635 are all exemplified compounds in the case where all of R ^{8 to} R ¹¹ are H in the following general formula (1).

Specifically, the compounds described in JP-A-2016-145190 are all exemplified compounds in the case where R ^{8 to} R ¹¹ are all H in the following general formula (1).

(5) Component (B)
In addition to the component (A), the olefin polymerization catalyst reacts with the metallocene compound (component (A), hereinafter may be simply referred to as A) in addition to the component (A) to react with the cationic metallocene compound. (Component (B), hereinafter may be simply referred to as B).

One of the compounds (B) that react with the metallocene compound (A) to form a cationic metallocene compound is an organoaluminum oxy compound.
The organoaluminum oxy compound has Al—O—Al bonds in the molecule, and the number of bonds is usually in the range of 1 to 100, preferably 1 to 50. Such an organoaluminum oxy compound is usually a product obtained by reacting an organoaluminum compound with water.
The reaction between organoaluminum and water is usually carried out in an inert hydrocarbon (solvent). As the inert hydrocarbon, aliphatic hydrocarbons such as pentane, hexane, heptane, cyclohexane, methylcyclohexane, benzene, toluene and xylene, alicyclic hydrocarbons and aromatic hydrocarbons can be used, but aliphatic hydrocarbons or Preference is given to using aromatic hydrocarbons.

As the organoaluminum compound used for the preparation of the organoaluminum oxy compound, any compound represented by the following general formula (4) can be used, but trialkylaluminum is preferably used.
R ⁶ tAlX ³ _3-t Formula (4)
(In the formula (4), R ⁶ represents a hydrocarbon group such as an alkyl group, alkenyl group, aryl group or aralkyl group having 1 to 18 carbon atoms, preferably 1 to 12 carbon atoms, and X ³ represents a hydrogen atom or a halogen atom. Represents an atom, and t represents an integer of 1 ≦ t ≦ 3.)

The alkyl group of the trialkylaluminum may be any of methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, pentyl group, hexyl group, octyl group, decyl group, dodecyl group, etc. It is particularly preferred that
Two or more of the above organoaluminum compounds can be mixed and used.

The reaction ratio (water / Al molar ratio) between water and the organoaluminum compound is preferably 0.25 / 1 to 1.2 / 1, particularly preferably 0.5 / 1 to 1/1, and the reaction temperature is Usually, it is -70-100 degreeC, Preferably it exists in the range of -20-20 degreeC. The reaction time is usually selected in the range of 5 minutes to 24 hours, preferably 10 minutes to 5 hours. As water required for the reaction, not only mere water but also crystal water contained in copper sulfate hydrate, aluminum sulfate hydrate and the like and components capable of generating water in the reaction system can be used. Of the organoaluminum oxy compounds described above, those obtained by reacting alkylaluminum with water are usually called aluminoxanes, particularly methylaluminoxane (including those substantially consisting of methylaluminoxane (MAO)). Is suitable as an organoaluminum oxy compound.
Of course, as the organoaluminum oxy compound, two or more of the above organoaluminum oxy compounds may be used in combination, and a solution obtained by dispersing or dispersing the organoaluminum oxy compound in the above-described inert hydrocarbon solvent. You may use.

  It is preferable to use an organoaluminum oxy compound as the component (B) for the olefin polymerization catalyst because the strain-hardening degree (λmax) of the resulting ethylene polymer is increased or the polymerization activity is high.

  Moreover, a borane compound and a borate compound are mentioned as another specific example of the compound (B) which reacts with a metallocene compound (A) and forms a cationic metallocene compound. More specifically, the borane compound is represented by triphenylborane, tri (o-tolyl) borane, tri (p-tolyl) borane, tri (m-tolyl) borane, tri (o-fluorophenyl) borane, tris ( p-fluorophenyl) borane, tris (m-fluorophenyl) borane, tris (2,5-difluorophenyl) borane, tris (3,5-difluorophenyl) borane, tris (4-trifluoromethylphenyl) borane, tris (3,5-ditrifluoromethylphenyl) borane, tris (2,6-ditrifluoromethylphenyl) borane, tris (pentafluorophenyl) borane, tris (perfluoronaphthyl) borane, tris (perfluorobiphenyl), tris ( Perfluoroanthryl) borane, tris (perfluorobi) Fuchiru) such as borane and the like.

  Among these, tris (3,5-ditrifluoromethylphenyl) borane, tris (2,6-ditrifluoromethylphenyl) borane, tris (pentafluorophenyl) borane, tris (perfluoronaphthyl) borane, tris (perfluoro) Biphenyl) borane, tris (perfluoroanthryl) borane, and tris (perfluorobinaphthyl) borane are more preferred, and tris (2,6-ditrifluoromethylphenyl) borane, tris (pentafluorophenyl) borane, tris ( Perfluoronaphthyl) borane and tris (perfluorobiphenyl) borane are exemplified as preferred compounds.

When the borate compound is specifically represented, the first example is a compound represented by the following general formula (5).
^{[L 1 -H] + [BR} 7 R 8 X 4 X 5] - ··· Equation (5)

In Formula (5), L ¹ is a neutral Lewis base, H is a hydrogen atom, and [L ¹ -H] is a Bronsted acid such as ammonium, anilinium, phosphonium, or the like. Examples of ammonium include trialkylammonium such as trimethylammonium, triethylammonium, tripropylammonium, tributylammonium, and tri (n-butyl) ammonium, and dialkylammonium such as di (n-propyl) ammonium and dicyclohexylammonium.

  Examples of anilinium include N, N-dialkylanilinium such as N, N-dimethylanilinium, N, N-diethylanilinium, N, N-2,4,6-pentamethylanilinium. Furthermore, examples of the phosphonium include triarylphosphonium, tributylphosphonium, triarylphosphonium such as tri (methylphenyl) phosphonium, tri (dimethylphenyl) phosphonium, and trialkylphosphonium.

In the formula (5), R ⁷ and R ⁸ are the same or different aromatic or substituted aromatic hydrocarbon groups containing 6 to 20, preferably 6 to 16 carbon atoms, and are connected to each other by a bridging group. As the substituent of the substituted aromatic hydrocarbon group, an alkyl group typified by a methyl group, an ethyl group, a propyl group, an isopropyl group or the like, or a halogen such as fluorine, chlorine, bromine or iodine is preferable. Further, X ⁴ and X ⁵ are a hydride group, a halide group, a hydrocarbon group containing 1 to 20 carbon atoms, a substituted carbon atom containing 1 to 20 carbon atoms in which one or more hydrogen atoms are replaced by halogen atoms. It is a hydrogen group.

Specific examples of the compound represented by the general formula (5) include tributylammonium tetra (pentafluorophenyl) borate, tributylammonium tetra (2,6-ditrifluoromethylphenyl) borate, tributylammonium tetra (3,5- Ditrifluoromethylphenyl) borate, tributylammonium tetra (2,6-difluorophenyl) borate, tributylammonium tetra (perfluoronaphthyl) borate, dimethylanilinium tetra (pentafluorophenyl) borate, dimethylanilinium tetra (2,6- Ditrifluoromethylphenyl) borate, dimethylanilinium tetra (3,5-ditrifluoromethylphenyl) borate, dimethylanilinium tetra (2,6-difluoropheny) ) Borate, dimethylanilinium tetra (perfluoronaphthyl) borate, triphenylphosphonium tetra (pentafluorophenyl) borate, triphenylphosphonium tetra (2,6-ditrifluoromethylphenyl) borate, triphenylphosphonium tetra (3,5- Ditrifluoromethylphenyl) borate, triphenylphosphonium tetra (2,6-difluorophenyl) borate, triphenylphosphonium tetra (perfluoronaphthyl) borate, trimethylammonium tetra (2,6-ditrifluoromethylphenyl) borate, triethylammonium tetra (Pentafluorophenyl) borate, triethylammonium tetra (2,6-ditrifluoromethylphenyl) borate, triethyla Monium tetra (perfluoronaphthyl) borate, tripropylammonium tetra (pentafluorophenyl) borate, tripropylammonium tetra (2,6-ditrifluoromethylphenyl) borate, tripropylammonium tetra (perfluoronaphthyl) borate, di (1 -Propyl) ammonium tetra (pentafluorophenyl) borate, dicyclohexylammonium tetraphenylborate and the like.

  Among these, tributylammonium tetra (pentafluorophenyl) borate, tributylammonium tetra (2,6-ditrifluoromethylphenyl) borate, tributylammonium tetra (3,5-ditrifluoromethylphenyl) borate, tributylammonium tetra (perfluoro) Naphthyl) borate, dimethylanilinium tetra (pentafluorophenyl) borate, dimethylaniliniumtetra (2,6-ditrifluoromethylphenyl) borate, dimethylaniliniumtetra (3,5-ditrifluoromethylphenyl) borate, dimethylanilinium Tetra (perfluoronaphthyl) borate is preferred.

Moreover, the 2nd example of a borate compound is represented by following General formula (6).
^{[L 2] + [BR 7} R 8 X 4 X 5] - ··· formula (6)

In the formula (6), L ² represents carbocation, methyl cation, ethyl cation, propyl cation, isopropyl cation, butyl cation, isobutyl cation, tert-butyl cation, pentyl cation, tropinium cation, benzyl cation, trityl cation, sodium. A cation, a proton, etc. are mentioned. R ⁷ , R ⁸ , X ⁴ and X ⁵ are the same as defined in the general formula (5).

Specific examples of the compound include trityl tetraphenyl borate, trityl tetra (o-tolyl) borate, trityl tetra (p-tolyl) borate, trityl tetra (m-tolyl) borate, trityl tetra (o-fluorophenyl) borate, Trityltetra (p-fluorophenyl) borate, trityltetra (m-fluorophenyl) borate, trityltetra (3,5-difluorophenyl) borate, trityltetra (pentafluorophenyl) borate, trityltetra (2,6-ditrifluoro) Methylphenyl) borate, trityltetra (3,5-ditrifluoromethylphenyl) borate, trityltetra (perfluoronaphthyl) borate, tropiniumtetraphenylborate, tropiniumtetra (o-tolyl) Rate, tropinium tetra (p-tolyl) borate, tropinium tetra (m-tolyl) borate, tropinium tetra (o-fluorophenyl) borate, tropinium tetra (p-fluorophenyl) borate, tropinium tetra (m- Fluorophenyl) borate, tropinium tetra (3,5-difluorophenyl) borate, tropinium tetra (pentafluorophenyl) borate, tropinium tetra (2,6-ditrifluoromethylphenyl) borate, tropinium tetra (3,5 - ditrifluoromethylphenyl) borate, tropicity tetra (perfluoro-naphthyl) _{borate, NaBPh 4, NaB (o-} CH 3 -Ph) 4, NaB (p-CH 3 -Ph) 4, NaB (m-CH 3 - Ph) ₄ , Na _{B (o-F-Ph)} 4, NaB (p-F-Ph) 4, NaB (m-F-Ph) 4, NaB (3,5-F 2 -Ph) 4, NaB (C 6 F 5) _{4, NaB (2,6- (CF 3} ) 2 -Ph) 4, NaB (3,5- (CF 3) 2 -Ph) 4, NaB (C 10 F 7) 4, HBPh 4 · 2 diethyl ether, _{HB (3,5-F 2 -Ph)} 4 · 2 diethyl _{ether, HB (C 6 F 5)} 4 · 2 diethyl _{ether, HB (2,6- (CF 3)} 2 -Ph) 4 · 2 diethyl ether, HB (3,5- (CF ₃ ) ₂ -Ph) ₄ · 2 diethyl ether and HB (C ₁₀ H ₇ ) ₄ · 2 diethyl ether can be exemplified.

Among these, trityltetra (pentafluorophenyl) borate, trityltetra (2,6-ditrifluoromethylphenyl) borate, trityltetra (3,5-ditrifluoromethylphenyl) borate, trityltetra (perfluoronaphthyl) borate, Tropinium tetra (pentafluorophenyl) borate, tropinium tetra (2,6-ditrifluoromethylphenyl) borate, tropinium tetra (3,5-ditrifluoromethylphenyl) borate, tropinium tetra (perfluoronaphthyl) borate, _{NaB (C 6 F 5) 4} , NaB (2,6- (CF 3) 2 -Ph) 4, NaB (3,5- (CF 3) 2 -Ph) 4, NaB (C 10 F 7) 4, _{HB (C 6 F 5) 4} · 2 diethyl ether _{, HB (2,6- (CF 3)} 2 -Ph) 4 · 2 diethyl _{ether, HB (3,5- (CF 3)} 2 -Ph) 4 · 2 diethyl _{ether, HB (C 10 H 7)} 4 · 2 diethyl ether is preferred.

More preferably, among these, trityltetra (pentafluorophenyl) borate, trityltetra (2,6-ditrifluoromethylphenyl) borate, tropiniumtetra (pentafluorophenyl) borate, tropiniumtetra (2,6-ditrifluoro) Methylphenyl) borate, NaB (C ₆ F ₅ ) ₄ , NaB (2,6- (CF ₃ ) ₂ -Ph) ₄ , HB (C ₆ F ₅ ) ₄ · 2 diethyl ether, HB (2,6- ( _{CF 3) 2 -Ph) 4 ·} 2 diethyl _{ether, HB (3,5- (CF 3)} 2 -Ph) 4 · 2 diethyl _{ether, HB (C 10 H 7) 4} · 2 diethyl ether.

  When a borane compound or a borate compound is used as the component (B), the polymerization activity and the copolymerizability are increased, so that the productivity of an ethylene polymer having a long chain branch is improved. As the component (B), a mixture of the organoaluminum oxy compound and the borane compound or borate compound can also be used. Further, two or more of the above borane compounds and borate compounds can be used in combination.

(6) Component (C)
The olefin polymerization catalyst may further contain an inorganic compound carrier (component (C)). As the inorganic carrier, a metal, a metal oxide, a metal chloride, a metal carbonate, a carbonaceous material, or a mixture thereof can be used.
Suitable metals that can be used for the inorganic carrier include, for example, iron, aluminum, nickel and the like.

Further, as the metal oxide, either alone oxide or composite oxide of the Periodic Table 1-14 Group elements include, for _{example, SiO 2, Al 2 O 3} , MgO, CaO, B 2 O 3, TiO 2, _{ZrO 2, Fe 2 O 3,} Al 2 O 3 · MgO, Al 2 O 3 · CaO, Al 2 O 3 · SiO 2, Al 2 O 3 · MgO · CaO, Al 2 O 3 · MgO · SiO 2, Al Examples include various natural or synthetic single oxides or composite oxides such as ₂ O ₃ .CuO, Al ₂ O ₃ .Fe ₂ O ₃ , Al ₂ O ₃ .NiO, and SiO ₂ .MgO. Here, the above formula is not a molecular formula but represents only the composition, and the structure and component ratio of the composite oxide used in the present invention are not particularly limited. In addition, the metal oxide used in the present invention may absorb a small amount of moisture or may contain a small amount of impurities.

As the metal chloride, for example, an alkali metal or alkaline earth metal chloride is preferable, and specifically, MgCl ₂ , CaCl _{2 and the} like are particularly preferable. As the metal carbonate, carbonates of alkali metals and alkaline earth metals are preferable, and specific examples include magnesium carbonate, calcium carbonate, barium carbonate and the like. Examples of the carbonaceous material include carbon black and activated carbon. Any of the above inorganic carriers can be suitably used in the present invention, but the use of metal oxides, silica, alumina and the like is particularly preferable.

These inorganic carriers are usually baked in air or an inert gas such as nitrogen or argon at 200 to 800 ° C., preferably 300 to 600 ° C., and the amount of surface hydroxyl group is 0.8 to 1.5 mmol / g. It is preferable to adjust to use. The properties of these inorganic carriers are not particularly limited, but usually the average particle size is 5 to 200 μm, preferably 10 to 150 μm, the average pore size is 20 to 1000 mm, preferably 50 to 500 mm, and the specific surface area is 150 to 1000 m. ² / g, preferably 200-700 m ² / g, pore volume 0.3-2.5 cm ³ / g, preferably 0.5-2.0 cm ³ / g, apparent specific gravity 0.20-0 It is preferred to use an inorganic carrier having a density of .50 g / cm ³ , preferably 0.25 to 0.45 g / cm ³ .

  Of course, the above-mentioned inorganic carriers can be used as they are, but as a pretreatment, these carriers are trimethylaluminum, triethylaluminum, triisobutylaluminum, trihexylaluminum, tripropylaluminum, tributylaluminum, trioctylaluminum, tridecylaluminum, It can be used after contacting an organoaluminum compound such as diisobutylaluminum hydride or an organoaluminum oxy compound containing an Al—O—Al bond.

(7) Component (D)
The catalyst for olefin polymerization of the present invention contains component (D), which is a compound represented by the following general formula, as an essential component.
General formula M ² L ¹ _n
(M ² represents a typical metal atom of Groups 1, 2 and 12-15 of the periodic table,
L ¹ is a hydrogen atom, a halogen atom, or a hydrocarbon group,
n is a number corresponding to the valence of M ² )

M ² represents a typical metal atom of Groups 1, 2 and 12 to 15 of the periodic table, specifically, Li, Be, B, Na, Mg, Al, K, Ca, Zn, Ga, Ge. , Preferably Li, B, Na, Mg, Al, K, Zn, more preferably Mg, Al, Zn, and even more preferably Al.
L ¹ is a hydrogen atom, a halogen atom, or a hydrocarbon group. Specifically, the halogen atom is F, Cl, Br, or I. The hydrocarbon group is preferably a nitrogen atom, an oxygen atom, a silicon atom, a phosphorus atom, A hydrocarbon group having 1 to 30 carbon atoms which may contain a sulfur atom, more preferably a hydrocarbon group having 1 to 20 carbon atoms which may contain a nitrogen atom, an oxygen atom or a silicon atom, more preferably an oxygen atom. And a hydrocarbon group having 1 to 11 carbon atoms, particularly preferably a hydrocarbon group having 1 to 11 carbon atoms composed of only carbon atoms and hydrogen atoms. L ¹ is may be the same or different if valence n of M ² is 2 or more, preferably at least one of the plurality of L ¹ is a hydrocarbon group, a plurality L ¹ More preferably, all of these are hydrocarbon groups.

Specific examples of the component _{(D), LiH, LiF,} LiCl, LiBr, LiI, CH 3 Li, C 2 H 5 Li, nC 3 H 7 Li, iC 3 H 7 Li, nC 4 H 9 Li, iC ₄ H ₉ Li, tC ₄ H ₉ Li, 1-C ₅ H ₁₁ Li, 2-C ₅ H ₁₁ Li, 3-C ₅ H ₁₁ Li, 2-CH ₃ -2C ₄ H ₈ Li, 2- _{CH 3 -3-C 4 H 8} Li , _{etc., 1-C 6 H 13 Li} , 2-C 6 H 13 Li, 3-C 6 H 13 Li, 2-CH 3 -1-C 5 H 10 Li, 2 _{-CH 3 -2-C 5 H 10} Li, 2-CH 3 -3-C 5 H 10 Li, 2,3- (CH 3) 2 -1-C 4 H 7 Li or the _{like, 1-C 7 H 15} Li, _{etc., 1-C 8 H} 17 Li or the _{like, 1-C 9 H} 19 Li or the _{like, 1-C 10 H} 21 Li or the like, 1-C ₁ H ₂₃ Li or the _{like, 1-C 12 H} 25 Li or the _{like, 1-C 13 H} 27 Li or the _{like, BeH 2, BeF 2, BeCl} 2 , _{etc., (CH 3)} 2 Be _{like, BH 3, BF 3, BCl} 3 Etc., (CH ₃ ) ₃ B, (CH ₃ ) ₂ BCl, etc., NaH, NaF, NaCl, NaBr etc., CH ₃ Na, C ₂ H ₅ Na, nC ₃ H ₇ Na, iC ₃ H ₇ Na, nC ₄ H ₉ Na etc., 1-C ₅ H ₁₁ Na, 2-C ₅ H ₁₁ Na etc., MgH ₂ , MgF ₂ , MgCl ₂ etc., (CH ₃ ) ₂ Mg, (C ₂ H ₅ ) ₂ Mg, (nC _{3 H 7) 2 Mg, (} iC 3 H 7) 2 Mg or the _{like, (nC 4 H 9) 2} Mg or the _{like, (CH 3) (C 2} H 5) Mg, (CH 3) (nC 3 H 7) Mg _{etc., (C 2 H 5) (} nC 4 H 9) Mg etc., divinyl Mg, Allyl Mg, _(hexenyl) 2 Mg, _(octenyl) 2 Mg, diphenyl Mg, Mg compound having a hydrocarbon group containing an unsaturated bond such as dibenzyl _{Mg, AlH 3, AlF 3,} AlCl 3 , etc., _(CH 3) ₃ Al, (C ₂ H ₅ ) ₃ Al, (nC ₃ H ₇ ) ₃ Al, (iC ₃ H ₇ ) ₃ Al, etc., (nC ₄ H ₉ ) ₃ Al, etc., (CH ₃ ) ₂ (C ₂ H ₅ ) Al, (CH ₃ ) ₂ (nC ₃ H ₇ ) Al, etc., (C ₂ H ₅ ) ₂ (nC ₄ H ₉ ) Al, etc., trivinyl Al, triallyl Al, (hexenyl) ₃ Al, (octenyl) ₃ Al, triphenyl Al, tribenzyl Al, etc. Al compounds having a hydrocarbon group containing an unsaturated bond, etc., KH, KF, KCl, etc., CH ₃ K, C ₂ H ₅ K, nC ₃ H ₇ K, iC ₃ H _{7 , NC 4 H 9 K, iC} 4 H 9 K, tC 4 H 9 K, 1-C 5 H 11 K or the _{like, CaH 2, CaF 2, CaCl} 2 , _{etc., (CH 3) 2 Ca,} (CH 3) CaCl _{etc., ZnH 2, ZnF 2, ZnCl} 2 , _{etc., (CH 3) 2 Zn,} (CH 3) ZnCl , _{etc., (C 2 H 5) 2} Zn, (CH 3) (C 2 H 5) Zn, (nC 3 _{H 7) 2 Zn, (iC} 3 H 7) 2 Zn, (nC 4 H 9) 2 Zn, (iC 4 H 9) 2 Zn, (tC 4 H 9) 2 Zn, (nC 5 H 11) 2 Zn , (NC ₆ H ₁₃ ) ₂ Zn, (nC ₇ H ₁₅ ) ₂ Zn, (nC ₈ H ₁₇ ) ₂ Zn, (nC ₉ H ₁₉ ) ₂ Zn, (nC ₁₀ H ₂₁ ) ₂ Zn, etc., divinyl Zn, Diallyl Zn, (Hexenyl) ₂ Zn, (Octenyl) ₂ Z n, Zn compounds having a hydrocarbon group containing an unsaturated bond such as diphenyl Zn, dibenzyl Zn, etc., GaH ₃ , GaF ₃ , GaCl ₃ etc., (CH ₃ ) ₃ Ga, (C ₂ H ₅ ) ₃ Ga, ( nC ₃ H ₇ ) ₃ Ga, (iC ₃ H ₇ ) ₃ Ga, etc., (nC ₄ H ₉ ) ₃ Ga, etc., (CH ₃ ) ₂ (C ₂ H ₅ ) Ga, (CH ₃ ) ₂ (nC ₃ H ₇₎ Ga or the _{like, (C 2 H 5) 2} (nC 4 H 9) Ga , _{etc., GeH 4, GeF 4, GeCl} 4 , _{etc., (CH 3) 4 Ge,} (C 2 H 5) 4 Ge, (nC 3 H ₇ ) ₄ Ge, (iC ₃ H ₇ ) ₄ Ge, etc. (nC ₄ H ₉ ) ₄ Ge etc., (CH ₃ ) ₃ (C ₂ H ₅ ) Ge, (CH ₃ ) ₃ (nC ₃ H ₇ ) Ge, etc., (C ₂ H ₅ ) ₃ (nC ₄ H ₉ ) Ge, etc. Example compounds for MgX ¹ _m R ¹ _n (OR ² ) _{2- mn in} the general formula (a) described in paragraphs [0034] to [0038] of No. 2229, paragraphs [0044] to [0046] ] ^{_{AlX 3 q R 4 r (OR}} 5) 3-q-r in the general formula described (c), exemplified compounds, and the like for. Further, a binuclear metal compound having the structure of the above compound, for example, (1,2-ethylene) di (ZnCl), (1,2-ethylene) di (ZnCH ₃ ), (1,2-ethylene) di (MgC ₂ H ₅ ), (1,4-butylene) di [Al (CH ₃ ) ₂ ], (1,4-butylene) di [Al (CH ₃ ) Cl] and the like.

(8) Preparation of catalyst for olefin polymerization Olefin containing component (A) which is an essential component of the method for producing an olefin polymer of the present invention, component (B) which is an essential component, and component (C) which is an optional component The contact method of each component when obtaining the polymerization catalyst is not particularly limited, and for example, the following methods can be arbitrarily adopted.

(I) After contacting the component (A) and the component (B), the component (C) is contacted as necessary.
(II) Component (A) is contacted with component (C) as necessary, and then component (B) is contacted.
(III) Component (B) is contacted with component (C) as necessary, and then component (A) is contacted.

  Of these contact methods, (I) and (III) are preferred, and (I) is most preferred. In any contact method, usually in an inert atmosphere such as nitrogen or argon, generally aromatic hydrocarbons such as benzene, toluene, xylene and ethylbenzene (usually 6 to 12 carbon atoms), heptane, hexane, decane and dodecane. In the presence of a liquid inert hydrocarbon such as an aliphatic or alicyclic hydrocarbon (usually having 5 to 12 carbon atoms) such as cyclohexane, a method of bringing each component into contact with stirring or non-stirring is employed. This contact is usually −100 ° C. to 200 ° C., preferably −50 ° C. to 100 ° C., more preferably 0 ° C. to 50 ° C., for 5 minutes to 50 hours, preferably 30 minutes to 24 hours, more preferably. It is desirable to carry out in 30 minutes to 12 hours.

  In addition, when contacting the component (A), the component (B) and, if necessary, the component (C), as described above, an aromatic hydrocarbon solvent in which a certain component is soluble or hardly soluble, and a certain species Any aliphatic or alicyclic hydrocarbon solvent in which these components are insoluble or hardly soluble can be used.

  In the case where the contact reaction between the components is performed stepwise, this may be used as it is as the solvent for the subsequent contact reaction without removing the solvent used in the previous step. In addition, after the previous catalytic reaction using a soluble solvent, liquid inert hydrocarbons in which certain components are insoluble or sparingly soluble (for example, aliphatics such as pentane, hexane, decane, dodecane, cyclohexane, benzene, toluene, xylene, etc.) Hydrocarbons, alicyclic hydrocarbons or aromatic hydrocarbons) and the desired product is recovered as a solid or once or part of the soluble solvent is removed by means such as drying. After removing the product as a solid, the subsequent catalytic reaction of the desired product can also be carried out using any of the inert hydrocarbon solvents described above. In this invention, it does not prevent performing contact reaction of each component in multiple times.

  In the present invention, the use ratio of the component (A) and the component (B) is not particularly limited, but the following ranges are preferable.

When an organoaluminum oxy compound is used as the component (B) that reacts with the component (A) to form a cationic metallocene compound, the aluminum atom of the organoaluminum oxy compound with respect to the transition metal (M ¹ ) in the component (A) The ratio (Al / M ¹ ) is usually in the range of 1 to 100,000, preferably 5 to 1000, more preferably 50 to 500, and when a borane compound or a borate compound is used, transition in the metallocene compound The atomic ratio (B / M ¹ ) of boron to metal (M ¹ ) is usually selected within the range of 0.01 to 100, preferably 0.1 to 50, and more preferably 0.2 to 10. desirable. Further, when a mixture of an organoaluminum oxy compound, a borane compound, and a borate compound is used as the compound (B) for generating a cationic metallocene compound, the transition metal (M ¹ ) is used for each compound in the mixture. On the other hand, it is desirable to select at a use ratio similar to the above.

  When using component (C), the amount of component (C) used is 1 g per 0.0001-5 mmol of transition metal in component (A), preferably 1 g per 0.001-0.5 mmol, more preferably 1 g per 0.01-0.1 mmol.

  By bringing the component (A), the component (B), and the component (C) into contact with each other by any one of the contact methods (I) to (III) as necessary, and then removing the solvent. The catalyst for olefin polymerization can be obtained as a solid catalyst. The removal of the solvent is desirably performed under normal pressure or reduced pressure at 0 to 200 ° C., preferably 20 to 150 ° C. for 1 minute to 50 hours, preferably 10 minutes to 10 hours.

The olefin polymerization catalyst can also be obtained by the following method.
(IV) The component (A) and the component (C) are contacted to remove the solvent, and this is used as a solid catalyst component, which is contacted with an organoaluminum oxy compound, borane compound, borate compound or a mixture thereof under polymerization conditions. .
(V) The organoaluminum oxy compound, borane compound, borate compound or mixture thereof and component (C) are contacted to remove the solvent, which is used as a solid catalyst component, and contacted with component (A) under polymerization conditions. .
In the case of the contact methods (IV) and (V), the same conditions as described above can be used for the component ratio, contact conditions, and solvent removal conditions.

  Moreover, a layered silicate is used as a component that serves as both the component (B) and the component (C) that react with the component (A), which is an essential component of the method for producing an olefin polymer of the present invention, to form a cationic metallocene compound. It can also be used. The layered silicate is a silicate compound having a crystal structure in which planes formed by ionic bonds or the like are stacked in parallel with each other with a weak binding force. Most layered silicates are naturally produced mainly as the main component of clay minerals, but these layered silicates are not limited to natural ones and may be artificially synthesized.

  Among these, montmorillonite, sauconite, beidellite, nontronite, saponite, hectorite, stevensite, bentonite, teniolite and the like, smectite group, vermiculite group and mica group are preferable.

In general, natural products are often non-ion-exchangeable (non-swellable). In that case, in order to have preferable ion-exchange (or swellable), ion exchange (or swellable) is provided. It is preferable to perform the process for providing. Among such treatments, particularly preferred are the following chemical treatments. Here, as the chemical treatment, any of a surface treatment for removing impurities adhering to the surface and a treatment that affects the crystal structure and chemical composition of the layered silicate can be used. Specifically, (i) acid treatment performed using hydrochloric acid, sulfuric acid or the like, (ii) alkali treatment performed using NaOH, KOH, NH ₃ or the like, (iii) selected from Groups 2 to 14 of the periodic table Salt treatment with a salt comprising at least one anion selected from the group consisting of a cation containing at least one kind of atom and a halogen atom or an anion derived from an inorganic acid, (iv) an alcohol, a hydrocarbon Examples thereof include organic compounds such as compounds, formamide and aniline. These processes may be performed independently or two or more processes may be combined.

  The layered silicate can be controlled in particle properties by pulverization, granulation, sizing, fractionation, etc. at any time before, during, or after all the steps. The method can be any purposeful. In particular, for granulation methods, for example, spray granulation method, rolling granulation method, compression granulation method, stirring granulation method, briquetting method, compacting method, extrusion granulation method, fluidized bed granulation Method, emulsion granulation method and submerged granulation method. Particularly preferable granulation methods are the spray granulation method, the rolling granulation method and the compression granulation method.

  Of course, the above-mentioned layered silicate can be used as it is, but these layered silicates are trimethylaluminum, triethylaluminum, triisobutylaluminum, tripropylaluminum, tributylaluminum, trihexylaluminum, trioctylaluminum, tridecylaluminum, It can be used in combination with an organoaluminum compound such as diisobutylaluminum hydride or an organoaluminum oxy compound containing an Al—O—Al bond.

In order to carry the component (A), which is an essential component of the olefin polymer production method of the present invention, on the layered silicate, the component (A) and the layered silicate are brought into contact with each other, or the component (A), organic An aluminum compound and a layered silicate may be brought into contact with each other.
The contact method of each component is not specifically limited, For example, the following methods are arbitrarily employable.
(VI) The component (A) and the organoaluminum compound are brought into contact with each other and then brought into contact with the layered silicate carrier.
(VII) The component (A) and the layered silicate support are contacted and then contacted with the organoaluminum compound.
(VIII) The organoaluminum compound and the layered silicate support are contacted and then contacted with the component (A).

  Of these contact methods, (VI) and (VIII) are preferred. In any contact method, usually in an inert atmosphere such as nitrogen or argon, generally aromatic hydrocarbons such as benzene, toluene, xylene and ethylbenzene (usually having 6 to 12 carbon atoms), heptane, hexane, decane and dodecane. In the presence of a liquid inert hydrocarbon such as an aliphatic or alicyclic hydrocarbon (usually having 5 to 12 carbon atoms) such as cyclohexane, a method of bringing each component into contact with stirring or non-stirring is employed.

  Although the usage-amount of a component (A), an organoaluminum compound, and a layered silicate support | carrier is not specifically limited, The following ranges are preferable. The supported amount of component (A) is 0.0001 to 5 mmol, preferably 0.001 to 0.5 mmol, more preferably 0.01 to 0.1 mmol, per 1 g of the layered silicate support. In the case of using an organoaluminum compound, the amount of Al supported is preferably in the range of 0.01 to 100 mol, preferably 0.1 to 50 mol, more preferably 0.2 to 10 mol.

  The method for carrying and removing the solvent can use the same conditions as those for the inorganic carrier. When a layered silicate is used as a component serving as both component (B) and component (C), the resulting olefin polymer has a narrow molecular weight distribution. Furthermore, the productivity of the olefin polymer having high polymerization activity and having a long chain branch is improved. The olefin polymerization catalyst thus obtained may be used after the prepolymerization of the monomer if necessary.

(9) Polymerization Method The method for producing an olefin polymer of the present invention can be used for homopolymerization of ethylene or copolymerization of ethylene and α-olefin.

  In the present invention, the polymerization reaction can be carried out in the presence of the above-mentioned supported catalyst, preferably by slurry polymerization or gas phase polymerization. In the case of slurry polymerization, with substantially no oxygen, water, etc., aliphatic hydrocarbons such as isobutane, hexane and heptane, aromatic hydrocarbons such as benzene, toluene and xylene, and alicyclic rings such as cyclohexane and methylcyclohexane Ethylene or the like is polymerized in the presence or absence of an inert hydrocarbon solvent selected from group hydrocarbons and the like. Needless to say, liquid monomers such as liquid ethylene and liquid propylene can also be used as the solvent. In the case of gas phase polymerization, ethylene or the like is polymerized in a reactor in which a gas flow of ethylene or comonomer is introduced, distributed, or circulated. In the present invention, more preferred polymerization is gas phase polymerization. The polymerization conditions are not particularly limited, but the temperature is 0 to 250 ° C., preferably 60 to 110 ° C., more preferably 60 to 100 ° C., and the olefin partial pressure is normal pressure to 10 MPa, preferably normal pressure to 4 MPa. Preferably it is in the range of 0.2 to 1.8 MPa, particularly preferably in the range of 0.2 to 1.5 MPa, and the polymerization time is 5 minutes to 12 hours, preferably 20 minutes to 8 hours, more preferably 30 minutes to 5 hours. Usually time is adopted.

  The molecular weight of the produced polymer can be adjusted to some extent by changing the polymerization conditions such as the polymerization temperature and the molar ratio of the catalyst, but the molecular weight can be adjusted more effectively by adding hydrogen to the polymerization reaction system. Can do. Moreover, even if a component for the purpose of removing moisture, a so-called scavenger, is added to the polymerization system, the polymerization can be carried out without any trouble. Such scavengers include organoaluminum compounds such as trimethylaluminum, triethylaluminum and triisobutylaluminum, the organoaluminum oxy compounds, modified organoaluminum compounds containing branched alkyl, organozinc compounds such as diethyl zinc and dibutyl zinc, diethyl Organic magnesium compounds such as magnesium, dibutylmagnesium and ethylbutylmagnesium, and grinier compounds such as ethylmagnesium chloride and butylmagnesium chloride are used. Of these, triethylaluminum, triisobutylaluminum, and ethylbutylmagnesium are preferable, and triethylaluminum is particularly preferable. The present invention can also be applied to a multistage polymerization system having two or more stages having different polymerization conditions such as hydrogen concentration, monomer amount, polymerization pressure, and polymerization temperature without any trouble.

(10) Conditions in the First Production Method The first production method is a method for producing an olefin polymer having a long-chain branched structure that is supplied so as to satisfy the following conditions (2) and (3). The supply amount ratio (mol / mol) of the component (D) to the component (A) is 1.5 to 100 times the ratio (mol / mol) in the following condition (1).

Condition (1) The ratio of M ^{2 to} M ¹ (mol / mol) is 85 to 130.
Condition (2) The ratio of M ^{1 to} the polymerization medium (μmol / kg) is 0.001 to 12
Condition (3) The ratio of M ^{2 to} the polymerization medium (mmol / kg) is 0.01-20.

In condition (1), the ratio of M ^{2 to} M ¹ (mol / mol) is 85 to 130, preferably 90 to 130, and more preferably 95 to 127.
In condition (2), the ratio of M ^{1 to} the polymerization medium (μmol / kg) is 0.001 to 12, preferably 0.01 to 12, and more preferably 0.1 to 11.
In condition (3), the ratio (mmol / kg) of M ^{2 to} the polymerization medium is 0.01 to 20, preferably 0.02 to 10, and more preferably 0.04 to 1.7.

In the first production method, the supply amount ratio (mol / mol) of the component (D) to the component (A) is 1.5 times to 100 times the ratio (mol / mol) in the above condition (1), preferably 1.7-70 times, more preferably 1.8-50 times.
When the above conditions are satisfied, the molecular weight distribution can be narrowed while maintaining the long-chain branched structure characteristics of the olefin polymer.

2. Production method of olefin polymer (second production method)
In the second production method of the present invention, an olefin polymerization catalyst containing the following essential components (A) and (B) and the following component (D) are added to the polymerization reactor containing the olefin monomer and the polymerization medium under the following conditions ( This is a method for producing an olefin polymer having a long-chain branched structure, which is carried out while satisfying 1a) to (3a).

Component (A): Bridged biscyclopentadienyl compound represented by the following general formula (1) containing a transition metal element M ¹

[In the formula (1), M ¹ represents a transition metal of Ti, Zr or Hf. X ¹ and X ² each independently represent a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a hydrocarbon group having 1 to 20 carbon atoms including an oxygen atom or a nitrogen atom, or 1 to 20 carbon atoms. A hydrocarbon group-substituted amino group or an alkoxy group having 1 to 20 carbon atoms. Q ¹ and Q ² each independently represent a carbon atom, a silicon atom or a germanium atom. R ¹ each independently represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, and at least two of the four R ¹ are bonded to form a ring together with Q ¹ and Q ^2. May be. m is 0 or 1, and when m is 0, Q ¹ is directly bonded to a conjugated 5-membered ring containing R ² and R ³ . R ² and R ³ are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing hydrocarbon group having 1 to 18 carbon atoms including 1 to 6 silicon atoms, or a carbon number. 1 to 20 halogen-containing hydrocarbon group, a C1-C40 hydrocarbon group containing an oxygen atom or a sulfur atom, or a C1-C40 hydrocarbon group-substituted silyl group. Of R ² and R ^3, or a pair of R ² and R ³ wherein R ³ to each other or adjacent neighboring alone may form a ring together with the carbon atom bonded. ]

Component (B): a compound that reacts with the compound of component (A) to form a cationic metallocene compound

Component (D): Compound represented by the general formula M ² L ¹ _n (M ² represents a typical metal atom of Group 1, Group 2 or Group 12-15 of the Periodic Table;
L ¹ is a hydrogen atom, a halogen atom, or a hydrocarbon group,
n is a number corresponding to the valence of M ² )

Condition (1a) The ratio of M ^{2 to} M ¹ (mol / mol) is 130 to 10,000.
Condition (2a) The ratio of M ^{1 to} the polymerization medium (μmol / kg) is 0.001 to 10
Condition (3a) The ratio of M ^{2 to} the polymerization medium (mmol / kg) is 0.05 to 20

  In the second production method of the present invention, the characteristic requirements and various conditions (condition (1), condition (2), condition (3)) in the first production method are the following conditions (1a) and (2a): ), Except that the condition (3a) has been replaced, the detailed description is omitted except for these conditions, and the description in the first production method is cited as it is.

Condition (1a) The ratio (mol / mol) of M ^{2 to} M ¹ is 130 to 10000, preferably 130 to 6000, and more preferably 150 to 5000.
Condition (2a) The ratio of M ^{1 to} the polymerization medium (μmol / kg) is 0.001 to 10, preferably 0.01 to 10, and more preferably 0.1 to 10.
Condition (3a) The ratio (mmol / kg) of M ^{2 to} the polymerization medium is 0.05 to 20, preferably 0.05 to 18, and more preferably 0.30 to 16.
When the above conditions are satisfied, the molecular weight distribution can be narrowed while maintaining the long-chain branched structure characteristics of the olefin polymer.

3. Properties of Olefin Polymer The properties of the olefin polymer obtained by the method for producing an olefin polymer of the present invention are not particularly limited, but from the viewpoint of moldability and mechanical properties, the following properties are preferable.
(1) Physical properties (i)
Molecular weight distribution of the olefin polymer obtained when the value of molecular weight distribution (Mw / Mn) measured by gel permeation chromatography (GPC) and the supply ratio of component (D) to component (A) are not increased ( preferably the ratio between the value of _{Mw 0 / Mn 0) ([} Mw / Mn] / [Mw 0 / Mn 0]) is from 0.50 to 0.95, it is from 0.55 to 0.93 Is more preferable, and 0.60 to 0.91 is particularly preferable. Within this range, the olefin polymer has a narrow molecular weight distribution.
Here, “obtained when the ratio of the supply amount of the component (D) to the component (A) is not increased” means the following matters in the first production method. That is, it means that the supply ratio (mol / mol) of component (D) to component (A) is 1.0 times the ratio of the following condition (1). Specifically, if the ratio (M ² / M ¹ ) of the condition (1) is 30, it means that the supply amount ratio (D / A) is also set to 30 (hereinafter defined similarly). ).


Condition (1) The ratio of M ^{2 to} M ¹ (mol / mol) is 30 to 130.

Further, “obtained when the ratio of the supply amount of the component (D) to the component (A) is not increased” means the following matters in the second production method. In the condition (1a), it means a case where the ratio of M ^{2 to} M ¹ (mol / mol) is less than 130 (hereinafter defined similarly).

(2) Physical properties (ii)
A value (g ′ _m ) of a branching index g ′ measured by a GPC measuring device combining a differential refractometer, a viscosity detector, and a light scattering detector at a molecular weight of 100,000 (G ′ _m ), and a component (D) The ratio (g ′ _m / g ′ _m0 ) of the molecular weight (g ′ _m0 ) of the branching index g ′ of the olefin polymer obtained without increasing the supply ratio of 10 is preferable, 0.93 to 1.07 is more preferable, and 0.95 to 1.05 is particularly preferable. Within this range, the long chain branched structure characteristics of the olefin polymer are maintained.

(3) Physical properties (iii)
The Mw / Mn of the olefin polymer is preferably 2.0 to 7.0, more preferably 2.4 to 6.7, and particularly preferably 2.6 to 6.5. Within this range, the olefin polymer has a narrow molecular weight distribution.

(4) Physical properties (iv)
The g ′ _m of the olefin polymer is preferably 0.50 to 0.95, more preferably 0.50 to 0.90, and still more preferably 0.55 to 0.85. 0.60 to 0.80 is particularly preferable. Within this range, the olefin polymer has a sufficiently high solution tension and excellent product properties such as moldability and mechanical strength.

(5) Physical properties (v)
The MFR (melt flow rate, 190 ° C., 2.16 kg load) of the olefin polymer is preferably 0.001 to 1000 g / 10 min, more preferably 0.005 to 100 g / 10 min, 0 It is especially preferable that it is 0.05-50 g / 10min. Within this range, an olefin polymer having good melt fluidity and excellent product properties such as moldability and mechanical strength is obtained.

(6) Physical properties (vi)
The density of the olefin polymer is preferably 0.895~0.970g / cm ^3, more preferably ^{0.900~0.965g / cm 3, 0.905~0.960g / cm} 3 It is particularly preferred that Within this range, the olefin polymer has good low-temperature processing characteristics and excellent product characteristics such as moldability, rigidity, and transparency.

(7) Formability The olefin polymer produced by the production method of the present invention has an improved moldability as compared with a normal ethylene polymer and has excellent formability.

  EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to these examples. The evaluation methods used in the examples are as follows, and the following catalyst synthesis step and polymerization step are all performed under a purified nitrogen atmosphere, and the solvent used was dehydrated and purified with molecular sieve 4A. Was used.

1. Various evaluation (measurement) methods (1) MFR:
Based on JIS K6760, it measured by 190 degreeC and the 2.16kg load. FR (flow rate ratio) was calculated from the ratio of MFR 10 kg and MFR (= MFR 10 kg / MFR), which was MFR measured in the same manner under the conditions of 190 ° C. and 10 kg load.

(2) Density: Based on JIS K7112, the density was measured by a density gradient tube method after the strand obtained at the time of MFR measurement was heat-treated at 100 ° C. for 1 hour and further allowed to stand at room temperature for 1 hour.

(3) Measurement of molecular weight distribution:
In the present invention, the weight average molecular weight (Mw) and the number average molecular weight (Mn) are those measured by gel permeation chromatography (GPC). Conversion from the retention volume to the molecular weight is performed using a calibration curve prepared in advance with standard polystyrene. The standard polystyrenes used are all the following brands manufactured by Tosoh Corporation. F380, F288, F128, F80, F40, F20, F10, F4, F1, A5000, A2500, A1000. A calibration curve is generated by injecting 0.2 mL of a solution dissolved in ODCB (containing 0.5 mg / mL BHT) so that each is 0.5 mg / mL. The calibration curve uses a cubic equation obtained by approximation by the least square method. The following numerical value is used for the viscosity formula [η] = K × M ^α used for conversion to molecular weight.
PS: K = 1.38 × 10 ⁻⁴ , α = 0.7
PE: K = 3.92 × 10 ⁻⁴ , α = 0.733
PP: K = 1.03 × 10 ⁻⁴ , α = 0.78

The measurement conditions for GPC are as follows.
Apparatus: Waters GPC (ALC / GPC 150C)
Detector: MIRAN 1A IR detector manufactured by FOXBORO (measurement wavelength: 3.42 μm)
Column: AD806M / S (3 pieces) manufactured by Showa Denko KK
Mobile phase solvent: o-dichlorobenzene Measurement temperature: 140 ° C.
Flow rate: 1.0 ml / min Injection volume: 0.2 ml
Sample preparation: Prepare a 1 mg / mL solution using ODCB (containing 0.5 mg / mL BHT) and dissolve it at 140 ° C. for about 1 hour. The baseline and section of the obtained chromatogram are performed as illustrated in FIG.

(4) Branch structure analysis by GPC-VIS Waters Alliance GPCV2000 was used as a GPC apparatus equipped with a differential refractometer (RI) and a viscosity detector (Viscometer). In addition, as a light scattering detector, a DAWN-E manufactured by Wyatt Technology, a multi-angle laser light scattering detector (MALLS) was used. The detectors were connected in the order of MALLS, RI, and Viscometer. The mobile phase solvent is 1,2,4-trichlorobenzene (added with the antioxidant Irganox 1076 at a concentration of 0.5 mg / mL). The flow rate is 1 mL / min. As the column, two Tosoh Corporation GMHHR-H (S) HT were connected and used. The temperature of the column, sample injection section, and each detector is 140 ° C. The sample concentration was 1 mg / mL. The injection volume (sample loop volume) is 0.2175 mL. In order to obtain the absolute molecular weight (M) obtained from MALLS, the radius of inertia (Rg), and the intrinsic viscosity ([η]) obtained from Viscometer, data processing software ASTRA (version 4.73.04) attached to MALLS was used. The calculation was performed with reference to the following documents.

References:
1. Developments in polymer characterization, vol. 4). Essex: Applied Science; 1984. Chapter 1.
2. Polymer, 45, 6495-6505 (2004).
3. Macromolecules, 33, 2424-2436 (2000).
4). Macromolecules, 33, 6945-6925 (2000).

[Calculation of branching index (g'm), etc.]
The branching index (g ′) is calculated as a ratio (ηbranch / ηlin) between the intrinsic viscosity (ηbranch) obtained by measuring the sample with the above Viscometer and the intrinsic viscosity (ηlin) obtained separately by measuring a linear polymer. To do.
When long chain branching is introduced into a polymer molecule, the radius of inertia is reduced compared to a linear polymer molecule of the same molecular weight. Since the intrinsic viscosity decreases as the radius of inertia decreases, the ratio of the intrinsic viscosity (ηbranch) of the branched polymer to the intrinsic viscosity (ηlin) of the linear polymer having the same molecular weight decreases as the long chain branching is introduced (ηbranch / ηlin). It will become. Therefore, when the branching index (g ′ = ηbranch / ηlin) is smaller than 1, it means that a branch is introduced, and the introduced long chain branching increases as the value decreases. Means that. In particular, in the present invention, the above g ′ at a molecular weight of 100,000 is calculated as g ′ _m as the absolute molecular weight obtained from MALLS.
FIG. 2 shows an example of the analysis result by GPC-VIS. FIG. 2 represents the branching index (g ′) in molecular weight (M) obtained from MALLS. Here, linear polyethylene Standard Reference Material 1475a (National Institute of Standards & Technology) was used as the linear polymer.

2. Examples and Comparative Examples [Comparative Example 1]
(1) Synthesis of Bridged Biscyclopentadienyl Compound (Component A) Dimethylsilylene (4- (4-trimethylsilyl-phenyl) -indenyl) (cyclopentadienyl) zirconium dichloride represented by the following chemical formula was converted to JP2013-227271A. It was synthesized according to the method described in Japanese Patent Publication Nos. [0140] to [0143]. This compound is referred to as metallocene compound A.

(2) Synthesis of Olefin Polymerization Catalyst In a nitrogen atmosphere, 5 g of silica fired at 600 ° C. for 5 hours was placed in a 200 mL two-necked flask and dried under reduced pressure with a vacuum pump for 1 hour while heating in an oil bath at 150 ° C. In a separately prepared 100 ml two-necked flask, 68 mg of metallocene compound A (component A) was placed in a nitrogen atmosphere and dissolved in 13.4 mL of dehydrated toluene. At room temperature, 8.6 mL of 20% methylaluminoxane / toluene solution (component B solution) manufactured by Albemarle was added to the toluene solution of metallocene compound A, and the mixture was stirred for 30 minutes. While heating and stirring the 200 mL two-necked flask containing the vacuum-dried silica in an oil bath at 40 ° C., the total amount of the toluene solution of the reaction product of the metallocene compound A and methylaluminoxane was added. After stirring at 40 ° C. for 1 hour, the toluene solvent was distilled off under reduced pressure while heating to 40 ° C. to obtain a solid catalyst.

(3) Production of ethylene / 1-hexene copolymer An ethylene / 1-hexene copolymer was produced using the solid catalyst obtained in the preparation of the above (2) solid catalyst. That is, 30 mL of 1-hexene, 0.20 mmol of triethylaluminum (component D), 200 mL of hydrogen, and 441 g of isobutane were added to a 2 L autoclave equipped with an induction stirrer, the temperature was raised to 75 ° C., ethylene was introduced, and the ethylene partial pressure was 1. The pressure was kept at 4 MPa. Next, 226 mg of the solid catalyst obtained in the above (2) was injected with nitrogen, and polymerization was continued for 60 minutes while maintaining an ethylene partial pressure of 1.4 MPa and a temperature of 75 ° C. During the polymerization reaction, hydrogen and 1-hexene were additionally supplied at a supply rate proportional to the ethylene consumption rate. The amount of 1-hexene supplied additionally was 16 mL. The polymerization was stopped by adding ethanol. The ethylene / 1-hexene copolymer thus obtained was 130 g. The polymerization results are summarized in the following table.

[Example 1]
As in Comparative Example 1, ethylene · 1- A hexene copolymer was produced. As a result, 41 g of ethylene / 1-hexene copolymer was produced. The polymerization results are summarized in the following table.

[Reference Example 1]
(1) Synthesis of a bridged biscyclopentadienyl compound (component A);
Dimethylsilylene (3-methyl-4- (2- (5-methyl) -furyl) -indenyl) (cyclopentadienyl) zirconium dichloride is obtained by the method described in JP 2013-227271 A [0159] to [0165]. According to the synthesis. This compound is referred to as metallocene compound B.

(2) Synthesis of Olefin Polymerization Catalyst A solid catalyst was prepared in the same manner as in Comparative Example 1 except that the firing temperature of silica was 400 ° C. and 62 mg of metallocene compound B was used instead of 68 mg of metallocene compound A.
(3) Production of ethylene / 1-butene copolymer An ethylene / 1-butene copolymer was produced using the solid catalyst obtained in (2) above.
That is, 344 g of purified n-heptane, 0.50 mmol of triethylaluminum (component D) and 34 mL of hydrogen were added to a 1 L autoclave equipped with an induction stirrer, and the temperature was raised to 75 ° C., and ethylene containing 5% by weight of 1-butene was introduced. The ethylene partial pressure was kept at 1.4 MPa. Subsequently, 10 mL of heptane slurry of 99 mg of the solid catalyst obtained in the above (2) was injected with argon gas, and polymerization was continued for 60 minutes while maintaining the ethylene partial pressure of 1.4 MPa and the temperature of 75 ° C. During the polymerization reaction, hydrogen was additionally supplied at a supply rate proportional to the ethylene consumption rate. The polymerization was stopped by adding ethanol. The ethylene / 1-butene copolymer thus obtained was 36 g. The polymerization results are summarized in the following table.

[Examples 2 and 3]
In Examples 2 and 3, the solid catalyst obtained in Reference Example 1 was used (see the description in [Reference Example 1] (2)).
In Examples 2 and 3, an ethylene / 1-butene copolymer was produced in the same manner as in Comparative Example 1 under the conditions described in the following table using this catalyst ([Comparative Example 1] (3 )). The polymerization results are summarized in the following table. In Table 6, the C ₂ partial pressure, means ethylene partial pressure.

[Comparative Example 2] Production of ethylene / 1-hexene copolymer [Reference Example 1] Using the solid catalyst (powder catalyst) obtained in (2), ethylene / 1-hexene gas phase continuous copolymerization was carried out. . That is, a gas phase continuous polymerization apparatus (internal volume of 100 L) prepared at a temperature of 75 ° C., a hexene / ethylene molar ratio of 1.1%, a hydrogen / ethylene molar ratio of 0.20%, a nitrogen concentration of 33 mol%, and an ethylene partial pressure of 0.54 MPa. Polymerization was carried out at a constant gas composition and temperature while intermittently supplying the powdered catalyst to a fluidized bed diameter 10 cm, fluidized bed species polymer (dispersant) 1.8 kg) at a rate of 246 mg / hour. . Further, 0.03 mol / L of a hexane diluted solution of triethylaluminum (component D) was supplied to the gas circulation line at 15.3 ml / hr. As a result, the average production rate of the produced polyethylene was 413 g / hour. The MFR and density of the ethylene / 1-hexene copolymer obtained after producing a cumulative amount of 5 kg or more were 0.1 g / 10 min and 0.916 g / cm ³ , respectively. The results are shown in the table below. In Table 7, the C ₂ partial pressure, means ethylene partial pressure.

[Example 4] Production of ethylene / 1-hexene copolymer Ethylene / 1-hexene gas phase continuous copolymerization was carried out in the same manner as in Comparative Example 2 except for the conditions described in the following table. The results are shown in the table below.

3. Evaluation As shown in Tables 4 to 7, in Example 1, the value of [Mw / Mn] / [Mw ₀ / Mn ₀ ] was lower than that in Comparative Example 1. Similarly, in Examples 2 and 3, the value of [Mw / Mn] / [Mw ₀ / Mn ₀ ] was lower than that of Reference Example 1. Similarly, in Example 4, the value of [Mw / Mn] / [Mw ₀ / Mn ₀ ] was lower than that in Comparative Example 2.
On the other hand, the ratio of branching index (g ′ _m / g ′ _m0 ) was the same in Example 1 and Comparative Example 1, and was the same in Examples 2 and 3 and Reference Example 1. Similarly, the ratio of branching index (g ′ _m / g ′ _m0 ) was the same in Example 4 and Comparative Example 2.
From these results, it was found that the molecular weight distribution can be narrowed in the present invention without changing the long-chain branched structure characteristics of the olefin polymer to be produced. By controlling the long-chain branch structure and molecular weight distribution structure of the olefin polymer, it becomes possible to control the melt viscoelastic properties of the olefin polymer. It is thought that it is useful for improvement.

  The present invention is not limited to the embodiments described in detail above, and various modifications or changes can be made within the scope of the claims of the present invention.

  According to the present invention, an olefin polymer having a narrow molecular weight distribution without changing the long-chain branched structure characteristics is provided. In this olefin polymer, it becomes possible to control the melt viscoelastic properties of the olefin polymer by controlling the long-chain branch structure and the molecular weight distribution structure, and the moldability and mechanical properties of the olefin polymer carried out in the molten state, It is useful for improving transparency and has high industrial applicability.

Claims (13)

In a polymerization reactor in which an olefin monomer and a polymerization medium are present, an olefin polymerization catalyst containing the following essential components (A) and (B) and the following component (D) are satisfied so as to satisfy the following conditions (1) to (3): Is a method for producing an olefin polymer having a long-chain branched structure, and the ratio of the amount of the component (D) to the component (A) (mol / mol) is the ratio in the following condition (1) ( mol / mol), and a method for producing an olefin polymer having a narrow molecular weight distribution.

Component (A): Bridged biscyclopentadienyl compound represented by the following general formula (1) containing a transition metal element M ¹


[In the formula (1), M ¹ represents a transition metal of Ti, Zr or Hf. X ¹ and X ² each independently represent a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a hydrocarbon group having 1 to 20 carbon atoms including an oxygen atom or a nitrogen atom, or 1 to 20 carbon atoms. A hydrocarbon group-substituted amino group or an alkoxy group having 1 to 20 carbon atoms. Q ¹ and Q ² each independently represent a carbon atom, a silicon atom or a germanium atom. R ¹ each independently represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, and at least two of the four R ¹ are bonded to form a ring together with Q ¹ and Q ^2. May be. m is 0 or 1, and when m is 0, Q ¹ is directly bonded to a conjugated 5-membered ring containing R ² and R ³ . R ² and R ³ are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing hydrocarbon group having 1 to 18 carbon atoms including 1 to 6 silicon atoms, or a carbon number. 1 to 20 halogen-containing hydrocarbon group, a C1-C40 hydrocarbon group containing an oxygen atom or a sulfur atom, or a C1-C40 hydrocarbon group-substituted silyl group. Of R ² and R ^3, or a pair of R ² and R ³ wherein R ³ to each other or adjacent neighboring alone may form a ring together with the carbon atom bonded. ]

Component (B): a compound that reacts with the compound of component (A) to form a cationic metallocene compound

Component (D): Compound represented by the general formula M ² L ¹ _n (M ² represents a typical metal atom of Group 1, Group 2 or Group 12-15 of the Periodic Table;
L ¹ is a hydrogen atom, a halogen atom, or a hydrocarbon group,
n is a number corresponding to the valence of M ² )

Condition (1) The ratio of M ^{2 to} M ¹ (mol / mol) is 85 to 130.
Condition (2) The ratio of M ^{1 to} the polymerization medium (μmol / kg) is 0.001 to 12
Condition (3) The ratio of M ^{2 to} the polymerization medium (mmol / kg) is 0.01-20.
In a polymerization reactor in which an olefin monomer and a polymerization medium are present, an olefin polymerization catalyst containing the following essential components (A) and (B) and the following component (D) are satisfied so as to satisfy the following conditions (1a) to (3a): A process for producing an olefin polymer having a long-chain branched structure, which is carried out by supplying to a catalyst.

Component (A): Bridged biscyclopentadienyl compound represented by the following general formula (1) containing a transition metal element M ¹


[In the formula (1), M ¹ represents a transition metal of Ti, Zr or Hf. X ¹ and X ² each independently represent a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a hydrocarbon group having 1 to 20 carbon atoms including an oxygen atom or a nitrogen atom, or 1 to 20 carbon atoms. A hydrocarbon group-substituted amino group or an alkoxy group having 1 to 20 carbon atoms. Q ¹ and Q ² each independently represent a carbon atom, a silicon atom or a germanium atom. R ¹ each independently represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, and at least two of the four R ¹ are bonded to form a ring together with Q ¹ and Q ^2. May be. m is 0 or 1, and when m is 0, Q ¹ is directly bonded to a conjugated 5-membered ring containing R ² and R ³ . R ² and R ³ are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing hydrocarbon group having 1 to 18 carbon atoms including 1 to 6 silicon atoms, or a carbon number. 1 to 20 halogen-containing hydrocarbon group, a C1-C40 hydrocarbon group containing an oxygen atom or a sulfur atom, or a C1-C40 hydrocarbon group-substituted silyl group. Of R ² and R ^3, or a pair of R ² and R ³ wherein R ³ to each other or adjacent neighboring alone may form a ring together with the carbon atom bonded. ]

Component (B): a compound that reacts with the compound of component (A) to form a cationic metallocene compound

Component (D): Compound represented by the general formula M ² L ¹ _n (M ² represents a typical metal atom of Group 1, Group 2 or Group 12-15 of the Periodic Table;
L ¹ is a hydrogen atom, a halogen atom, or a hydrocarbon group,
n is a number corresponding to the valence of M ² )

Condition (1a) The ratio of M ^{2 to} M ¹ (mol / mol) is 130 to 10,000.
Condition (2a) The ratio of M ^{1 to} the polymerization medium (μmol / kg) is 0.001 to 10
Condition (3a) The ratio of M ^{2 to} the polymerization medium (mmol / kg) is 0.05 to 20
The method for producing an olefin polymer according to claim 1 or 2, wherein the obtained olefin polymer satisfies the following physical properties (i) and (ii).

Physical Properties (i) Olefin obtained when the value of molecular weight distribution (Mw / Mn) measured by gel permeation chromatography (GPC) and the supply ratio of component (D) to component (A) are not increased The ratio ([Mw / Mn] / [Mw ₀ / Mn ₀ ]) to the value of the molecular weight distribution (Mw ₀ / Mn ₀ ) of the polymer is 0.50 to 0.95.

Physical Properties (ii) A value (g ′ _m ) at a molecular weight of 100,000 of a branching index g ′ measured by a GPC measuring device combining a differential refractometer, a viscosity detector, and a light scattering detector, and the above component (A ) The ratio of the branching index g ′ of the olefin polymer obtained in the case of not increasing the supply ratio of the component (D) to the molecular weight (g ′ _m0 ) of the olefin polymer (g ′ _m / g ′ _m0 ) Is 0.90 to 1.10.
The method for producing an olefin polymer according to any one of claims 1 to 3, wherein the obtained olefin polymer satisfies the following physical properties (iii) and (iv).

Physical Properties (iii) The Mw / Mn is 2.0 to 7.0.
Physical Properties (iv) The g ′ _m is 0.50 to 0.95.   The method for producing an olefin polymer according to any one of claims 1 to 4, wherein the olefin monomer is ethylene. 6. The method for producing an olefin polymer according to claim 5, wherein the obtained olefin polymer satisfies the following physical properties (v) and (vi).
Physical property (v) MFR is 0.001-1000 g / 10min.
Physical Properties (vi) The density is 0.895-0.970 g / cm ³ .   The method for producing an olefin polymer according to any one of claims 1 to 6, wherein the polymerization medium is a hydrocarbon solvent or a polyolefin (particles or pellets).   The method for producing an olefin polymer according to any one of claims 1 to 7, wherein the polymerization reactor is a slurry polymerization reactor or a gas phase polymerization reactor.   The method for producing an olefin polymer according to any one of claims 1 to 8, wherein the polymerization reaction is performed at a temperature of 60 to 110 ° C.   The method for producing an olefin polymer according to any one of claims 1 to 9, wherein the polymerization reaction is performed at an olefin partial pressure of 0.2 to 1.9 MPa. The olefin polymer according to any one of claims 1 to 10, wherein the component (D) is the general formula AlL ¹ ₃ (L ¹ is a hydrogen atom, a halogen atom, or a hydrocarbon group). Manufacturing method.   The method for producing an olefin polymer according to any one of claims 1 to 11, wherein the olefin polymerization catalyst further comprises an inorganic compound carrier (component (C)).   The olefin polymer obtained by the manufacturing method of the olefin polymer of any one of the said Claims 1-12.