JPH08208782A - Process for producing olefin polymer - Google Patents

Abstract

(57) [Summary] [Object] The present invention provides a method for producing an olefin polymer which is excellent in moldability, heat resistance, rigidity and impact resistance. [Structure] In the present invention, (A) a solid titanium catalyst component,
In the presence of (B) an organometallic compound, and optionally (C) an olefin polymerization catalyst (1) comprising an electron donor,
[I-1] a step of producing a crystalline polypropylene component,
[I-2] A step of producing a low crystalline or non-crystalline ethylene / α-olefin copolymer component is carried out in any order to form a propylene block copolymer component, and then [II] An olefin polymerization catalyst (2) comprising (D) a metallocene compound and (E) an organoaluminum oxy compound (E-1) and / or a Lewis acid or an ionic compound (E-2) is added to a polymerization system. , Ethylene and 3 to 2 carbon atoms
0 to form an ethylene / α-olefin copolymer component.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for producing an olefin polymer, and more particularly to a method for producing an olefin polymer having excellent mechanical strength such as rigidity and impact resistance.

[0002]

BACKGROUND OF THE INVENTION Crystalline homopolypropylene has been generally known as a polymer having excellent rigidity, heat resistance and surface gloss. A propylene-based block copolymer having both a polypropylene component and a rubber component is also known as a propylene polymer having improved impact resistance as compared with crystalline homopolypropylene.

Since such a propylene polymer has characteristics such as low specific gravity and easy recycling, it has been attracting attention from the viewpoint of environmental protection, and its use in a wider range of applications is desired.

For this reason, the impact resistance of propylene polymers, particularly crystalline polypropylene, is further desired to be improved. Conventionally, as a method for improving the impact resistance of a propylene polymer, a method of forming a propylene-based block copolymer as described above, or a crystalline polypropylene,
A method of forming a polypropylene composition by mixing a modifier such as polyethylene or a rubber-like substance is known. Such a rubber-like substance is generally an amorphous or low crystalline ethylene / propylene random copolymer (EP
R), polyisobutylene, polybutadiene, etc. are used.

However, in order to improve the impact resistance by adding the rubber-like substance as described above, it is necessary to add a large amount of the rubber-like substance to polypropylene. However, a polypropylene composition containing a large amount of the rubber-like substance. Although the impact resistance is improved, the mechanical strength such as rigidity, heat resistance, and surface hardness are greatly reduced.

Therefore, a polypropylene composition has been proposed which contains an inorganic filler such as talc for imparting rigidity together with the above rubber-like substance. However, a polypropylene composition containing a large amount of a rubber-like substance has a problem in that it cannot be used in applications requiring high rigidity because there is a limit in improving rigidity by blending an inorganic filler such as talc. .

Further, the propylene polymer obtained by the prior art is not always sufficient in rigidity and heat resistance depending on the application, and its use may be limited. For this reason, the advent of a method for producing an olefin polymer capable of obtaining a polypropylene-based olefin polymer excellent in mechanical strength such as rigidity, moldability, heat resistance and impact resistance is desired.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and it is possible to produce an olefin polymer which is excellent in moldability, heat resistance, rigidity and impact resistance. An object is to provide a method for producing an olefin polymer that can be used.

[0009]

SUMMARY OF THE INVENTION The method for producing an olefin polymer according to the present invention comprises: [I] a solid titanium catalyst component containing (A) magnesium, titanium, a halogen and an electron donor; (B) an organometallic compound; [I-1] propylene is homopolymerized in the presence of (C) an olefin polymerization catalyst (1) consisting of an electron donor, or propylene and another α-olefin are copolymerized to obtain crystalline properties. A step of producing a polypropylene component, and a step of producing a low crystalline or non-crystalline ethylene / α-olefin copolymer component by copolymerizing [I-2] ethylene and an α-olefin having 3 to 20 carbon atoms. Are performed in any order to form a propylene-based block copolymer component, and then [II] (D) a transition metal compound containing a ligand having a cyclopentadienyl skeleton, and (E) (E -1) Organic An olefin polymerization catalyst (2) consisting of a miniumoxy compound and / or (E-2) a Lewis acid or an ionic compound is added to the polymerization system to co-exist ethylene and an α-olefin having 3 to 20 carbon atoms. It is characterized by being polymerized to form a low crystalline or non-crystalline ethylene / α-olefin copolymer component.

[0010]

DETAILED DESCRIPTION OF THE INVENTION The method for producing an olefin polymer according to the present invention will be specifically described below. In the present invention, the term "polymerization" is sometimes used to mean not only homopolymerization but also copolymerization, and the term "polymer" refers to not only homopolymer but also copolymer. May also be used in the sense of including.

In the present invention, [I-1] a step of producing a crystalline polypropylene component [I-1] using an olefin polymerization catalyst (1) containing a solid titanium catalyst component (A), and [I-2 ] The step of producing a low crystalline or non-crystalline ethylene / α-olefin copolymer component is carried out in any order to form a propylene-based block copolymer component, and then [II] a specific transition metal compound An olefin polymerization catalyst (2) containing (D) is added to the polymerization system to copolymerize ethylene and α-olefin to form a low crystalline or non-crystalline ethylene / α-olefin copolymer component. This produces an olefin polymer.

First, each component forming the olefin polymerization catalyst (1) used in the method for producing an olefin polymer according to the present invention will be described. (A) Solid Titanium Catalyst Component The (A) solid titanium catalyst component used in the present invention can be prepared by contacting the following magnesium compound, titanium compound and electron donor.

(A) Used for preparing solid titanium catalyst component
Specific examples of the titanium compound include
The tetravalent titanium compound represented by Ti (OR)_gX_4-g (In the formula, R is a hydrocarbon group, and X is a halogen atom.
And g is 0 ≦ g ≦ 4. As such a titanium compound, specifically, TiC
l_Four, TiBr_Four, TiI_FourTitanium tetrahalide, such as
Ti (OCH₃) Cl₃, Ti (OC₂H_Five) Cl₃, Ti (O-n-C_Four
H₉) Cl₃, Ti (OC₂H _Five) Br₃, Ti (O-iso-C_FourH₉) Br
₃Trihalogenated alkoxy titanium such as Ti (OC
H₃)₂Cl₂, Ti (OC₂H_Five)₂Cl₂, Ti (O-n-C_FourH₉)₂C
l₂, Ti (OC ₂H_Five)₂Br₂Dihalogenated dialkoxy such as
Si Titanium, Ti (OCH₃)₃Cl, Ti (OC₂H_Five)₃Cl, Ti
(O-n-C_FourH₉)₃Cl, Ti (OC₂H _Five)₃Monoha such as Br
Trialkoxy Titanium Rogen, Ti (OCH₃)_Four, Ti
(OC₂H_Five)_Four, Ti (O-n-C_FourH₉)_Four, Ti (O-iso-C_FourH₉)
_Four, Ti (O-2-ethylhexyl)_FourSuch as tetraalkoxy
Titanium etc. can be illustrated.

Of these, halogen-containing titanium compounds are preferable, titanium tetrahalides are more preferable, and titanium tetrachloride is particularly preferable. These titanium compounds may be used alone or in combination of two or more. Further, these titanium compounds may be diluted with a hydrocarbon compound or a halogenated hydrocarbon compound.

Examples of the magnesium compound used for preparing the solid titanium catalyst component (A) include a magnesium compound having a reducing property and a magnesium compound having no reducing property.

Examples of the reducing magnesium compound include magnesium compounds having a magnesium-carbon bond or a magnesium-hydrogen bond. Specific examples of such a magnesium compound having a reducing property include dimethyl magnesium, diethyl magnesium, dipropyl magnesium,
Dibutyl magnesium, diamyl magnesium, dihexyl magnesium, didecyl magnesium, ethyl magnesium chloride, propyl magnesium chloride, butyl magnesium chloride, hexyl magnesium chloride, amyl magnesium chloride, butyl ethoxy magnesium, ethyl butyl magnesium, butyl magnesium hydride, etc. it can. These magnesium compounds may be used alone or may form a complex compound with an organic metal compound described later. Further, these magnesium compounds may be liquid or solid, or may be derived by reacting metallic magnesium with a corresponding compound. It can also be derived from metallic magnesium during catalyst preparation using the methods described above.

Specific examples of the non-reducing magnesium compound include magnesium halides such as magnesium chloride, magnesium bromide, magnesium iodide and magnesium fluoride; magnesium methoxy chloride, magnesium ethoxy chloride and magnesium isopropoxy chloride. Alkoxy magnesium halides such as butoxy magnesium chloride and octoxy magnesium chloride; allyoxy magnesium halides such as phenoxy magnesium chloride and methylphenoxy magnesium chloride; ethoxy magnesium, isopropoxy magnesium, butoxy magnesium, n-octoxy magnesium, 2-ethylhexoxy Alkoxy magnesium such as magnesium; Phenoxy magnesium, dimethylphenoxy magnesium, etc. Examples include xymagnesium; magnesium carboxylates such as magnesium laurate and magnesium stearate.

The non-reducing magnesium compound may be a compound derived from the above-mentioned reducing magnesium compound or a compound derived during preparation of the catalyst component.

A magnesium compound having no reducing property is
To derive from a reducing magnesium compound,
For example, a reducing magnesium compound is contacted with halogen, a halogen-containing organosilicon compound, a halogen-containing aluminum compound or other halogen compound, an alcohol, an ester, a ketone, an aldehyde or other compound having an active carbon-oxygen bond, or a polysiloxane compound. You can do it.

In the present invention, the magnesium compound may be, in addition to the above-mentioned reducing magnesium compound and non-reducing magnesium compound, a complex compound, a complex compound or another metal of the above magnesium compound and another metal. It may be a mixture with a compound. further,
You may use the said compound in combination of 2 or more type.

As the magnesium compound used for the preparation of the solid titanium catalyst component (A), many magnesium compounds other than those mentioned above can be used, but in the finally obtained solid titanium catalyst component (A). , Preferably in the form of a halogen-containing magnesium compound,
Therefore, when a halogen-free magnesium compound is used, it is preferable to react it with a halogen-containing compound during the preparation.

Among the above-mentioned magnesium compounds, a magnesium compound having no reducing property is preferable, a halogen-containing magnesium compound is more preferable, and magnesium chloride, alkoxy magnesium chloride, and allyloxy magnesium chloride are particularly preferable.

The solid titanium catalyst component (A) used in the present invention is formed by contacting the above-mentioned magnesium compound with the above-mentioned titanium compound and electron donor (a).

As the electron donor (a) used in preparing the solid titanium catalyst component (A), alcohols,
Phenols, ketones, aldehydes, carboxylic acids, organic acid halides, esters of organic or inorganic acids, ethers, acid amides, acid anhydrides, ammonia, amines, nitriles, isocyanates, nitrogen-containing cyclic compounds, oxygen-containing cyclic compounds, etc. Can be mentioned. More specifically, methanol,
Ethanol, propanol, butanol, pentanol, hexanol, 2-ethylhexanol, octanol, dodecanol, octadecyl alcohol, oleyl alcohol, benzyl alcohol, phenylethyl alcohol, cumyl alcohol, isopropyl alcohol,
1 to 18 carbon atoms such as isopropylbenzyl alcohol
1 to 1 carbon atoms such as alcohols, trichloromethanol, trichloroethanol, trichlorohexanol, etc.
8 halogen-containing alcohols, phenol, cresol, xylenol, ethylphenol, propylphenol, nonylphenol, cumylphenol, naphthol and the like, which may have a lower alkyl group, having 6 to 20 carbon atoms.
Of phenols, acetone, methyl ethyl ketone, methyl isobutyl ketone, acetophenone, benzophenone, benzoquinone, etc., having 3 to 15 carbon atoms, acetaldehyde, propionaldehyde, octylaldehyde, benzaldehyde, tolualdehyde, naphthaldehyde, etc., having 2 to 15 carbon atoms Aldehydes, methyl formate, methyl acetate, ethyl acetate, vinyl acetate, propyl acetate, octyl acetate, cyclohexyl acetate, ethyl propionate, methyl butyrate, ethyl valerate, methyl chloroacetate, ethyl dichloroacetate, methyl methacrylate, crotonic acid Ethyl, ethyl cyclohexanecarboxylate, methyl benzoate, ethyl benzoate, propyl benzoate, butyl benzoate, octyl benzoate, cyclohexyl benzoate, phenyl benzoate Benzyl benzoate, methyl toluate, ethyl toluate, amyl toluate, ethyl ethyl benzoate, methyl anisate, ethyl anisate, ethyl ethoxybenzoate, γ-butyrolactone, δ-valerolactone, coumarin, phthalide, ethyl carbonate, etc. C2-C30 organic acid esters, acetyl chloride, benzoyl chloride, toluic acid chloride, anisic acid chloride and other C2-C15 acid halides, methyl ether, ethyl ether, isopropyl ether, butyl ether, amyl ether , Ethers having 2 to 20 carbon atoms such as tetrahydrofuran, anisole, diphenyl ether, acetic acid N, N-dimethylamide, benzoic acid N, N-diethylamide, toluic acid N, N-dimethylamide and other acid amides, methylamine, Ethylamine, dimethy Amines such as amine, diethylamine, trimethylamine, triethylamine, tributylamine, tribenzylamine, tetramethylenediamine, hexamethylenediamine, nitriles such as acetonitrile, benzonitrile, trinitrile, acetic anhydride, phthalic anhydride, benzoic anhydride, etc. Acid anhydrides, pyrroles such as pyrrole, methylpyrrole and dimethylpyrrole, pyrroline; pyrrolidine; indole; pyridine, methylpyridine, ethylpyridine, propylpyridine, dimethylpyridine, ethylmethylpyridine, trimethylpyridine, phenylpyridine, benzylpyridine, chloride Pyridines such as pyridine, nitrogen-containing cyclic compounds such as piperidines, quinolines, isoquinolines, tetrahydrofuran, 1,4-cineole, 1,8-cineole Pinault furan, methyl furan,
Examples thereof include cyclic oxygen-containing compounds such as dimethylfuran, diphenylfuran, benzofuran, coumarane, phthalane, tetrahydropyran, pyran and ditedropyran.

As the organic acid ester, a polyvalent carboxylic acid ester having a skeleton represented by the following general formula can be mentioned as a particularly preferable example.

[0026]

Embedded image

In the above formula, R ¹ is a substituted or unsubstituted hydrocarbon group, R ² , R ⁵ and R ⁶ are hydrogen or a substituted or unsubstituted hydrocarbon group, and R ³ and R ⁴ are hydrogen or a substituted group. Alternatively, it is an unsubstituted hydrocarbon group, and preferably at least one of them is a substituted or unsubstituted hydrocarbon group. R ³ and R ⁴ may be connected to each other to form a ring structure. When the hydrocarbon groups R ^{1 to} R ⁶ are substituted, the substituent includes a hetero atom such as N, O and S, and is, for example, C—O—C, COOR, COOH, OH, SO.
_It has groups such as ₃ H, —C—N—C—, and NH ₂ .

Specific examples of such polycarboxylic acid ester include diethyl succinate, dibutyl succinate, diethyl methyl succinate, diisobutyl α-methyl glutarate, diethyl methyl malonate, diethyl ethyl malonate and isopropyl malonate. Acid diethyl, diethyl butylmalonate, diethyl phenylmalonate, diethyl diethylmalonate, diethyl dibutylmalonate, monooctyl maleate, dioctyl maleate, dibutyl maleate, dibutyl butylmaleate, diethyl butylmaleate, β-methylglutar Acid diisopropyl, ethyl succinate, di-2-ethylhexyl fumarate, diethyl itaconate, aliphatic polycarboxylic acid esters such as dioctyl citracone, diethyl 1,2-cyclohexanecarboxylate, 1,2-cyclyl Hexanecarboxylic acid diisobutyl, tetrahydrophthalic acid diethyl, adicyclic polycarboxylic acid ester such as diethyl nadic acid, monoethyl phthalate, dimethyl phthalate, methyl ethyl phthalate, monoisobutyl phthalate, diethyl phthalate, ethyl isobutyl phthalate, Di-n-propyl phthalate, Di-isopropyl phthalate, Di-n-butyl phthalate, Diisobutyl phthalate, Di-n-heptyl phthalate, Di-2-ethylhexyl phthalate, Di-n-octyl phthalate, Dineopentyl phthalate, Phthalic acid Aromatic polycarboxylic acid esters such as didecyl, benzyl butyl phthalate, diphenyl phthalate, diethyl naphthalene dicarboxylate, dibutyl naphthalene dicarboxylate, triethyl trimellitate and dibutyl trimellitate, 3,4-furandicarboxylic acid, etc. Examples thereof include cyclic polycarboxylic acid esters.

Other examples of polyvalent carboxylic acid esters include diethyl adipate, diisobutyl adipate, diisopropyl sebacate, di-n-butyl sebacate, di-n-octyl sebacate, and di-2-ethylhexyl sebacate. Examples thereof include long chain dicarboxylic acid esters.

In the present invention, as the electron donor (a), an organic silicon compound (ci) or a polyether compound (c-ii) as described below can be used as the electron donor (C).

In addition to these, water, anionic, cationic and nonionic surfactants can also be used.
In the present invention, as the electron donor (a), of these, carboxylic acid esters are preferable, and polyvalent carboxylic acid esters are particularly preferable, and phthalic acid esters are particularly preferable.

Two or more of these compounds can be used in combination. Further, when the above titanium compound, magnesium compound and electron donor are brought into contact with each other, a carrier-supporting solid titanium catalyst component (A) can be prepared by using the following particulate carrier.

Examples of such carriers include Al ₂ O ₃ and Si.
O ₂ , B ₂ O ₃ , MgO, CaO, TiO ₂ , ZnO, Zn
Examples thereof include resins such as ₂ O, SnO ₂ , BaO, ThO, and styrene-divinylbenzene copolymer. Of these carriers, SiO ₂ and Al ₂ O are preferable.
₃ , MgO, ZnO, Zn ₂ O and the like can be mentioned.

The above components may be contacted in the presence of other reaction agents such as silicon, phosphorus and aluminum. The solid titanium catalyst component (A) can be produced by bringing the above-mentioned titanium compound, magnesium compound and electron donor into contact with each other, and can be produced by any method including known methods.

The specific production method of the solid titanium catalyst component (A) will be briefly described below by giving some examples. (1) A method in which a solution of a magnesium compound, an electron donor and a hydrocarbon solvent is contact-reacted with an organometallic compound to precipitate a solid, or while being precipitated, a titanium compound is contact-reacted.

(2) A method in which a complex consisting of a magnesium compound and an electron donor is brought into contact with an organometallic compound to cause a reaction, and then a titanium compound is brought into a catalytic reaction. (3) For the contact product between the inorganic carrier and the organic magnesium compound,
A method of catalytically reacting a titanium compound and preferably an electron donor. At this time, the contact product may be previously contact-reacted with a halogen-containing compound and / or an organometallic compound.

(4) A magnesium compound-supported inorganic or organic carrier is obtained from a mixture of a solution containing a magnesium compound, an electron donor, and optionally a hydrocarbon solvent, and an inorganic or organic carrier. How to contact.

(5) magnesium compound, titanium compound,
A method for obtaining a solid titanium catalyst component carrying magnesium and titanium by contacting a solution containing an electron donor, and optionally a hydrocarbon solvent, with an inorganic or organic carrier.

(6) A method of reacting an organomagnesium compound in a liquid state with a halogen-containing titanium compound by catalytic reaction. At this time, the electron donor is used once. (7) A method of contacting a titanium compound after a liquid reaction of an organomagnesium compound with a halogen-containing compound.
At this time, the electron donor is used once.

(8) A method of catalytically reacting an alkoxy group-containing magnesium compound with a halogen-containing titanium compound. At this time, the electron donor is used once. (9) A method of reacting a complex of an alkoxy group-containing magnesium compound and an electron donor with a titanium compound.

(10) A method in which a complex consisting of an alkoxy group-containing magnesium compound and an electron donor is contacted with an organometallic compound and then reacted with a titanium compound. (11) A method of contacting and reacting a magnesium compound, an electron donor, and a titanium compound in any order. In this reaction, each component may be pretreated with an electron donor and / or a reaction aid such as an organometallic compound or a halogen-containing silicon compound. In this method, it is preferable to use the electron donor at least once.

(12) A method of reacting a liquid magnesium compound having no reducing ability with a liquid titanium compound, preferably in the presence of an electron donor, to precipitate a solid magnesium-titanium complex.

(13) A method of further reacting the reaction product obtained in (12) with a titanium compound. (14) A method of further reacting the reaction product obtained in (11) or (12) with an electron donor and a titanium compound.

(15) A method of treating a solid material obtained by pulverizing a magnesium compound, preferably an electron donor and a titanium compound with any of halogen, a halogen compound and an aromatic hydrocarbon. In this method,
It may include a step of pulverizing only the magnesium compound, the complex compound consisting of the magnesium compound and the electron donor, or the magnesium compound and the titanium compound. Further, after pulverization, pretreatment with a reaction auxiliary agent and then treatment with halogen or the like may be performed. Examples of the reaction aid include organic metal compounds and halogen-containing silicon compounds.

(16) A method of pulverizing a magnesium compound and then contacting and reacting with the titanium compound. At this time, it is preferable to use an electron donor or a reaction aid during pulverization and / or contact / reaction.

(17) A method of treating the compound obtained in (11) to (16) above with halogen or a halogen compound or an aromatic hydrocarbon. (18) A method of bringing a contact reaction product of a metal oxide, an organomagnesium and a halogen-containing compound into contact with an electron donor and a titanium compound.

(19) A method of reacting a magnesium compound such as a magnesium salt of an organic acid, alkoxy magnesium, aryloxy magnesium and the like with a titanium compound and / or a halogen-containing hydrocarbon and preferably an electron donor.

(20) A method of bringing a hydrocarbon solution containing at least a magnesium compound and alkoxytitanium into contact with a titanium compound and / or an electron donor. At this time, it is preferable to coexist with a halogen-containing compound such as a halogen-containing silicon compound.

(21) A liquid magnesium compound having no reducing ability is reacted with an organometallic compound to precipitate a solid magnesium-metal (aluminum) complex,
Then, a method of reacting an electron donor and a titanium compound.

The amount of each component used in preparing the solid titanium catalyst component (A) varies depending on the preparation method and cannot be specified unconditionally. For example, the amount of electron donor is 0.01 per mol of the magnesium compound. ~ 5 mol, preferably 0.1 to 1 mol, and the titanium compound is used in an amount of 0.01 to 1000 mol, preferably 0.1 to 200 mol.

The solid titanium catalyst component (A) thus obtained contains magnesium, titanium, halogen and an electron donor. In this solid titanium catalyst component (A), the halogen / titanium (atomic ratio) is about 2 to
200, preferably about 4-100, the electron donor / titanium (molar ratio) is about 0.01-100, preferably about 0.2-10, and magnesium / titanium (atomic ratio) is about 1 It is desirable to be -100, preferably about 2-50.

(B) Organometallic Compound In the present invention, as the organometallic compound (B) forming the olefin polymerization catalyst (1), specifically, the following periodic table groups I to III are used. The organometallic compound of is used.

(B-1) General formula R ¹ _m Al (OR ² ) _n H _p X _q (In the formula, R ¹ and R ² are carbonized containing usually 1 to 15, preferably 1 to 4 carbon atoms. Hydrogen groups, which may be the same or different, X represents a halogen atom,
0 <m ≦ 3, n is 0 ≦ n <3, p is 0 ≦ p <3, and q is 0
≦ q <3, and m + n + p + q = 3)
An organoaluminum compound represented by.

[0054] (B-2) the general formula M ¹ AlR ¹ ₄ (wherein, M ¹ is Li, Na, a K, R ¹ is as defined above) and a group I metal and aluminum represented by Complex alkylated product.

(B-3) General formula R ¹ R ² M ² (wherein R ¹ and R ² are the same as above, and M ² is M
g, Zn or Cd) represented by Group II or
Group III dialkyl compounds.

Examples of the organoaluminum compound belonging to the above (B-1) include the following compounds. A compound represented by the general formula R ¹ _m Al (OR ² ) _3-m (wherein R ¹ and R ² are the same as defined above, and m is preferably a number of 1.5 ≦ m ≦ 3). A compound represented by the general formula R ¹ _m AlX _3-m (wherein R ¹ is the same as defined above, X is halogen, and m is preferably 0 <m <3); ¹ _m AlH _3-m (wherein R ¹ is as defined above, and m is preferably 2 ≦
m <3), a compound represented by the general formula R ¹ _m Al (OR ² ) _n X _q (wherein R ¹ and R ² are the same as defined above, X is halogen, and 0 <m ≦ 3). , 0 ≦ n <3, 0 ≦ q <3, and m + n + q = 3).

The aluminum compound belonging to (B-1) is more specifically a trialkylaluminum such as triethylaluminum or tributylaluminum,
Trialkenyl aluminum such as triisoprenyl aluminum, dialkyl aluminum alkoxide such as diethyl aluminum ethoxide and dibutyl aluminum butoxide, alkyl aluminum sesquialkoxide such as ethyl aluminum sesquiethoxide and butyl aluminum sesquibutoxide, R ¹ _2.5 Al (OR
² ) Partially alkoxylated alkyl aluminum having an average composition represented by _0.5 , diethyl aluminum chloride, dibutyl aluminum chloride, dialkyl aluminum halides such as diethyl aluminum bromide, ethyl aluminum sesquichloride, butyl aluminum sesquichloride, ethyl Alkyl aluminum sesquihalides such as aluminum sesquibromide, partially aluminum halides such as ethyl aluminum dichloride, propyl aluminum dichloride, alkyl aluminum dihalides such as butyl aluminum dibromide, and dialkyls such as diethyl aluminum hydride and dibutyl aluminum hydride. Aluminum hydride, ethyl aluminum dihydride, propyla Other partially hydrogenated alkylaluminum such as alkylaluminum dihydride such as mini-um dihydride, ethyl aluminum ethoxy chloride, butyl aluminum butoxide cycloalkyl chloride,
Mention may be made of partially alkoxylated and halogenated alkyl aluminums such as ethyl aluminum ethoxy bromide.

Further, as a compound similar to (B-1),
An organic aluminum compound in which two or more aluminum atoms are bonded via an oxygen atom or a nitrogen atom can be given.
Examples of such a compound include (C ₂ H ₅ ) ₂ A
lOAl (C ₂ H ₅ ) ₂ , (C ₄ H ₉ ) ₂ AlOAl (C
_{4 H 9) 2, (C} 2 H 5) 2 AlN (C 2 H 5) Al (C 2 H 5)
_In addition to _2, etc., aluminoxanes such as methylaluminoxane can also be mentioned.

The compounds belonging to (B-2) above include L
Examples thereof include iAl (C ₂ H ₅ ) ₄ and LiAl (C ₇ H ₁₅ ) ₄ .

Of these, organoaluminum compounds are preferably used. (C) Electron Donor In the present invention, as the electron donor (C), an organosilicon compound (ci) and a compound having two or more ether bonds existing through a plurality of atoms (hereinafter also referred to as “polyether compound”) (I.e.) (c-ii) can be used.

(Ci) Organosilicon Compound The organosilicon compound used in the present invention is represented by the following formula (i). During _{^{R a n -Si- (OR b)}} 4-n ... (i) ( wherein, n is 1, 2 or 3, when n is 1, R ^a is a secondary or tertiary hydrocarbon group And n is 2
Or 3, at least one of R ^a is a secondary or tertiary hydrocarbon group, R ^a may be the same or different, and R ^b is a hydrocarbon having 1 to 4 carbon atoms. When the group is 4-n and 2 or 3, OR ^b may be the same or different. ) In the organosilicon compound represented by the formula (i), the secondary or tertiary hydrocarbon group is a cyclopentyl group,
Examples thereof include a cyclopentenyl group, a cyclopentadienyl group, these groups having a substituent, or a hydrocarbon group in which carbon adjacent to Si is secondary or tertiary. More specifically, the substituted cyclopentyl group, 2-methylcyclopentyl group, 3-methylcyclopentyl group, 2-ethylcyclopentyl group, 2-n-butylcyclopentyl group, 2,3-dimethylcyclopentyl group, 2,4-dimethyl Cyclopentyl group,
2,5-dimethylcyclopentyl group, 2,3-diethylcyclopentyl group, 2,3,4-trimethylcyclopentyl group, 2,3,5-
Examples thereof include a cyclopentyl group having an alkyl group such as a trimethylcyclopentyl group, a 2,3,4-triethylcyclopentyl group, a tetramethylcyclopentyl group and a tetraethylcyclopentyl group.

The substituted cyclopentenyl group includes 2-methylcyclopentenyl group, 3-methylcyclopentenyl group,
2-ethylcyclopentenyl group, 2-n-butylcyclopentenyl group, 2,3-dimethylcyclopentenyl group, 2,4-dimethylcyclopentenyl group, 2,5-dimethylcyclopentenyl group, 2,3,4-trimethyl Examples include cyclopentenyl group, cyclopentenyl group having an alkyl group such as 2,3,5-trimethylcyclopentenyl group, 2,3,4-triethylcyclopentenyl group, tetramethylcyclopentenyl group, and tetraethylcyclopentenyl group. it can.

The substituted cyclopentadienyl group is 2-
Methylcyclopentadienyl group, 3-methylcyclopentadienyl group, 2-ethylcyclopentadienyl group, 2-n-butylcyclopentadienyl group, 2,3-dimethylcyclopentadienyl group, 2,4 -Dimethylcyclopentadienyl group,
2,5-dimethylcyclopentadienyl group, 2,3-diethylcyclopentadienyl group, 2,3,4-trimethylcyclopentadienyl group, 2,3,5-trimethylcyclopentadienyl group, 2, 3,4-triethylcyclopentadienyl group, 2,3,4,
5-tetramethylcyclopentadienyl group, 2,3,4,5-tetraethylcyclopentadienyl group, 1,2,3,4,5-pentamethylcyclopentadienyl group, 1,2,3,4 Examples thereof include cyclopentadienyl groups having an alkyl group such as a 5,5-pentaethylcyclopentadienyl group.

Examples of the hydrocarbon group in which the carbon adjacent to Si is secondary carbon include i-propyl group, s-butyl group, s-amyl group and α-methylbenzyl group. Examples of the hydrocarbon group whose carbon adjacent to is a tertiary carbon include a t-butyl group, a t-amyl group, an α, α′-dimethylbenzyl group, and an admantyl group.

Specific examples of the organosilicon compound represented by the formula (i) include cyclopentyltrimethoxysilane, 2-methylcyclopentyltrimethoxysilane, and 2,3-dimethyl when n is 1. Cyclopentyltrimethoxysilane, cyclopentyltriethoxysilane, iso-butyltriethoxysilane, t-butyltriethoxysilane, cyclohexyltrimethoxysilane, cyclohexyltriethoxysilane, 2-norbornanetrimethoxysilane, 2-norbornanetriethoxysilane, etc. Examples are alkoxysilanes.

When n is 2, dicyclopentyldiethoxysilane, t-butylmethyldiethoxysilane,
Examples thereof include dialkoxysilanes such as t-amylmethyldiethoxysilane, cyclohexylmethyldiethoxysilane, t-butylmethyldimethoxysilane, dicyclohexyldimethoxysilane, cyclohexylmethyldimethoxysilane, and 2-norbornanemethyldimethoxysilane.

When n is 2, the following formula (i
The dimethoxy compound represented by i) is also included.

[0068]

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In the formula, R ^a and R ^c are each independently a cyclopentyl group, a substituted cyclopentyl group, a cyclopentenyl group, a substituted cyclopentenyl group, a cyclopentadienyl group, a substituted cyclopentadienyl group, or S
A hydrocarbon group in which the carbon adjacent to i is a secondary carbon or a tertiary carbon is shown.

Examples of the organosilicon compound represented by the formula (ii) include dicyclopentyldimethoxysilane, dicyclopentenyldimethoxysilane, dicyclopentadienyldimethoxysilane, di-t-butyldimethoxysilane and di (2 -Methylcyclopentyl) dimethoxysilane, di (3-methylcyclopentyl) dimethoxysilane, di (2-ethylcyclopentyl) dimethoxysilane,
Di (2,3-dimethylcyclopentyl) dimethoxysilane,
Di (2,4-dimethylcyclopentyl) dimethoxysilane,
Di (2,5-dimethylcyclopentyl) dimethoxysilane,
Di (2,3-diethylcyclopentyl) dimethoxysilane,
Di (2,3,4-trimethylcyclopentyl) dimethoxysilane, di (2,3,5-trimethylcyclopentyl) dimethoxysilane, di (2,3,4-triethylcyclopentyl) dimethoxysilane, di (tetramethylcyclopentyl) dimethoxysilane , Di (tetraethylcyclopentyl) dimethoxysilane, di (2-methylcyclopentenyl) dimethoxysilane, di (3-methylcyclopentenyl) dimethoxysilane, di (2-ethylcyclopentenyl) dimethoxysilane, di (2-n-butylcyclo) Pentenyl) dimethoxysilane, di (2,3-dimethylcyclopentenyl) dimethoxysilane, di (2,4-dimethylcyclopentenyl) dimethoxysilane, di (2,5-dimethylcyclopentenyl) dimethoxysilane, di (2,3, 4-trimethylcyclopentenyl)
Dimethoxysilane, di (2,3,5-trimethylcyclopentenyl) dimethoxysilane, di (2,3,4-triethylcyclopentenyl) dimethoxysilane, di (tetramethylcyclopentenyl) dimethoxysilane, di (tetraethylcyclopentenyl) dimethoxy Silane, di (2-methylcyclopentadienyl) dimethoxysilane, di (3-methylcyclopentadienyl) dimethoxysilane, di (2-ethylcyclopentadienyl) dimethoxysilane, di (2-n-butylcyclopenta) Dienyl) dimethoxysilane, di (2,
3-dimethylcyclopentadienyl) dimethoxysilane,
Di (2,4-dimethylcyclopentadienyl) dimethoxysilane, di (2,5-dimethylcyclopentadienyl) dimethoxysilane, di (2,3-diethylcyclopentadienyl)
Dimethoxysilane, di (2,3,4-trimethylcyclopentadienyl) dimethoxysilane, di (2,3,5-trimethylcyclopentadienyl) dimethoxysilane, di (2,3,4-triethylcyclopentadienyl) ) Dimethoxysilane, di (2,3,4,5-tetramethylcyclopentadienyl) dimethoxysilane, di (2,3,4,5-tetraethylcyclopentadienyl) dimethoxysilane, di (1,2,3 , 4,5-Pentamethylcyclopentadienyl) dimethoxysilane, di (1,2,
3,4,5-Pentaethylcyclopentadienyl) dimethoxysilane, di-t-amyl-dimethoxysilane, di (α, α'-dimethylbenzyl) dimethoxysilane, di (admantyl) dimethoxysilane, admantyl-t-butyldimethoxy Examples thereof include silane, cyclopentyl-t-butyldimethoxysilane, diisopropyldimethoxysilane, dis-butyldimethoxysilane, dis-amyldimethoxysilane, and isopropyl-s-butyldimethoxysilane.

When n is 3, tricyclopentylmethoxysilane, tricyclopentylethoxysilane, dicyclopentylmethylmethoxysilane, dicyclopentylethylmethoxysilane, dicyclopentylmethylethoxysilane, cyclopentyldimethylmethoxysilane, cyclopentyldiethylmethoxysilane, Examples include monoalkoxysilanes such as cyclopentyldimethylethoxysilane.

Further, as the organosilicon compound (ci),
An organosilicon compound represented by the following formula (iii) can also be used. R _n Si (OR ′) _4-n (iii) (wherein R and R ′ are hydrocarbon groups, and 0 <n <4
As such an organosilicon compound represented by the general formula (i), specifically, trimethylmethoxysilane, trimethylethoxysilane, trimethylphenoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane,
Diisopropyldimethoxysilane, diphenyldimethoxysilane, phenylmethyldimethoxysilane, diphenyldiethoxysilane, bis-o-tolyldimethoxysilane,
Bis-m-tolyldimethoxysilane, bis-p-tolyldimethoxysilane, bis-p-tolyldiethoxysilane, bisethylphenyldimethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, vinyltri Methoxysilane, vinyltriethoxysilane, n-propyltriethoxysilane, n-butyltriethoxysilane, decyltrimethoxysilane, decyltriethoxysilane, ethyltriisopropoxysilane, vinyltributoxysilane, phenyltrimethoxysilane, phenyltri Ethoxysilane, methyltriallyloxy silane, etc.

Further, as compounds similar to the organosilicon compound represented by the formula (iii), γ-chloropropyltrimethoxysilane, γ-aminopropyltriethoxysilane, chlorotriethoxysilane, ethyl silicate, butyl silicate, Other examples include vinyl tris (β-methoxyethoxysilane), vinyltriacetoxysilane, and dimethyltetraethoxydisiloxane.

The organosilicon compound represented by the formula (iii) may be the same as the organosilicon compound represented by the formula (i). You may use these in combination of 2 or more types.

In the present invention, among these, dimethoxysilanes, particularly dimethoxysilane represented by the formula (ii), are preferable, and specifically, dicyclopentyldimethoxysilane, di-t-butyldimethoxysilane, di (2- Methylcyclopentyl) dimethoxysilane, di (3-methylcyclopentyl) dimethoxysilane, di-t-amyldimethoxysilane and the like are preferable.

(C-ii) Polyether Compound In the compound having two or more ether bonds existing through a plurality of atoms (polyether compound) used in the present invention, the atom existing between these ether bonds is It is one or more selected from the group consisting of carbon, silicon, oxygen, sulfur, phosphorus, and boron, and has 2 or more atoms. Of these, a relatively bulky substituent at an atom between ether bonds, specifically, a substituent having 2 or more carbon atoms, preferably 3 or more, having a linear, branched or cyclic structure, and more preferably a branched substituent. Those in which a substituent having a ring-like or cyclic structure is bonded are desirable. Further, a compound in which a plurality of carbon atoms, preferably 3 to 20, more preferably 3 to 10 and particularly preferably 3 to 7 carbon atoms are contained in an atom existing between two or more ether bonds is preferable.

Examples of the polyether compound (c-ii) include compounds represented by the following formula.

[0078]

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In the formula, n is an integer of 2 ≦ n ≦ 10, and R
^{1 to} R ²⁶ are carbon, hydrogen, oxygen, halogen, nitrogen, sulfur,
At least one selected from phosphorus, boron and silicon
R ^{1 to} R ²⁶ , preferably R ^{1 to} R ²ⁿ , which may be a substituent having a certain element, may jointly form a ring other than a benzene ring, and an atom other than carbon in the main chain. May be included.

Specific examples of the above polyether compound (c-ii) include 2- (2-ethylhexyl) -1,3-dimethoxypropane, 2-isopropyl-1,3-dimethoxypropane, 2- Butyl-1,3-dimethoxypropane, 2-s-butyl-
1,3-dimethoxypropane, 2-cyclohexyl-1,3-dimethoxypropane, 2-phenyl-1,3-dimethoxypropane, 2-cumyl-1,3-dimethoxypropane, 2- (2-phenylethyl) -1 , 3-Dimethoxypropane, 2- (2-cyclohexylethyl) -1,3-dimethoxypropane, 2- (p-chlorophenyl) -1,3-dimethoxypropane, 2- (diphenylmethyl) -1,3-dimethoxypropane , 2- (1-naphthyl) -1,3-dimethoxypropane, 2- (2-fluorophenyl) -1,3-dimethoxypropane, 2- (1-decahydronaphthyl) -1,3-dimethoxypropane, 2 -(Pt-Butylphenyl) -1,3-dimethoxypropane, 2,2-dicyclohexyl-1,3-dimethoxypropane, 2,2-dicyclopentyl-1,
3-dimethoxypropane, 2,2-diethyl-1,3-dimethoxypropane, 2,2-dipropyl-1,3-dimethoxypropane,
2,2-diisopropyl-1,3-dimethoxypropane, 2,2-dibutyl-1,3-dimethoxypropane, 2-methyl-2-propyl
-1,3-dimethoxypropane, 2-methyl-2-benzyl-1,3-
Dimethoxypropane, 2-methyl-2-ethyl-1,3-dimethoxypropane, 2-methyl-2-isopropyl-1,3-dimethoxypropane, 2-methyl-2-phenyl-1,3-dimethoxypropane, 2- Methyl-2-cyclohexyl-1,3-dimethoxypropane, 2,2-bis (p-chlorophenyl) -1,3-dimethoxypropane, 2,2-bis (2-cyclohexylethyl) -1,3-dimethoxypropane, 2-Methyl-2-isobutyl-1,3-dimethoxypropane, 2-methyl-2- (2-ethylhexyl) -1,3-
Dimethoxypropane, 2,2-diisobutyl-1,3-dimethoxypropane, 2,2-diphenyl-1,3-dimethoxypropane, 2,2-dibenzyl-1,3-dimethoxypropane, 2,2-bis (cyclohexylmethyl ) -1,3-Dimethoxypropane, 2,2-diisobutyl-1,3-diethoxypropane, 2,2-
Diisobutyl-1,3-dibutoxypropane, 2-isobutyl-
2-isopropyl-1,3-dimethoxypropane, 2- (1-methylbutyl) -2-isopropyl-1,3-dimethoxypropane,
2- (1-methylbutyl) -2-s-butyl-1,3-dimethoxypropane, 2,2-di-s-butyl-1,3-dimethoxypropane, 2,2
-Di-t-butyl-1,3-dimethoxypropane, 2,2-dineopentyl-1,3-dimethoxypropane, 2-isopropyl-2-isopentyl-1,3-dimethoxypropane, 2-phenyl-2-isopropyl- 1,3-dimethoxypropane, 2-phenyl-2-s-
Butyl-1,3-dimethoxypropane, 2-benzyl-2-isopropyl-1,3-dimethoxypropane, 2-benzyl-2-s-butyl-1,3-dimethoxypropane, 2-phenyl-2-benzyl-
1,3-dimethoxypropane, 2-cyclopentyl-2-isopropyl-1,3-dimethoxypropane, 2-cyclopentyl-2-
s-Butyl-1,3-dimethoxypropane, 2-cyclohexyl-
2-isopropyl-1,3-dimethoxypropane, 2-cyclohexyl-2-s-butyl-1,3-dimethoxypropane, 2-isopropyl-2-s-butyl-1,3-dimethoxypropane, 2-cyclohexyl-2 -Cyclohexylmethyl-1,3-dimethoxypropane, 2,3-diphenyl-1,4-diethoxybutane, 2,3-dicyclohexyl-1,4-diethoxybutane, 2,2-dibenzyl-1,4-di Ethoxybutane, 2,3-dicyclohexyl-1,4-
Diethoxybutane, 2,3-diisopropyl-1,4-diethoxybutane, 2,2-bis (p-methylphenyl) -1,4-dimethoxybutane, 2,3-bis (p-chlorophenyl) -1, 4-dimethoxybutane, 2,3-bis (p-fluorophenyl) -1,4-
Dimethoxybutane, 2,4-diphenyl-1,5-dimethoxypentane, 2,5-diphenyl-1,5-dimethoxyhexane, 2,4
-Diisopropyl-1,5-dimethoxypentane, 2,4-diisobutyl-1,5-dimethoxypentane, 2,4-diisoamyl-1,
5-dimethoxypentane, 3-methoxymethyltetrahydrofuran, 3-methoxymethyldioxane, 1,3-diisobutoxypropane, 1,2-diisobutoxypropane, 1,2-diisobutoxyethane, 1,3-diisoamyloxypropane , 1,
3-diisoneopentyloxyethane, 1,3-dineopentyloxypropane, 2,2-tetramethylene-1,3-dimethoxypropane, 2,2-pentamethylene-1,3-dimethoxypropane, 2,2 -Hexamethylene-1,3-dimethoxypropane, 1,2
-Bis (methoxymethyl) cyclohexane, 2,8-dioxaspiro [5,5] undecane, 3,7-dioxabicyclo [3,3,1] nonane, 3,7-dioxabicyclo [3,3,0] Octane, 3,3-diisobutyl-1,5-oxononane, 6,6-diisobutyldioxyheptane, 1,1-dimethoxymethylcyclopentane, 1,1-bis (dimethoxymethyl) cyclohexane, 1,1-bis (methoxy Methyl) bicyclo [2,2,1]
Heptane, 1,1-dimethoxymethylcyclopentane, 2-methyl-2-methoxymethyl-1,3-dimethoxypropane, 2-cyclohexyl-2-ethoxymethyl-1,3-diethoxypropane, 2-cyclohexyl-2- Methoxymethyl-1,3-dimethoxypropane, 2,2-diisobutyl-1,3-dimethoxycyclohexane, 2-isopropyl-2-isoamyl-1,3-dimethoxycyclohexane, 2-cyclohexyl-2-methoxymethyl-1,3 -Dimethoxycyclohexane, 2-isopropyl-2-
Methoxymethyl-1,3-dimethoxycyclohexane, 2-isobutyl-2-methoxymethyl-1,3-dimethoxycyclohexane, 2-cyclohexyl-2-ethoxymethyl-1,3-diethoxycyclohexane, 2-cyclohexyl-2-ethoxy Methyl-1,3-dimethoxycyclohexane, 2-isopropyl-
2-ethoxymethyl-1,3-diethoxycyclohexane, 2-
Isopropyl-2-ethoxymethyl-1,3-dimethoxycyclohexane, 2-isobutyl-2-ethoxymethyl-1,3-diethoxycyclohexane, 2-isobutyl-2-ethoxymethyl-
1,3-dimethoxycyclohexane, tris (p-methoxyphenyl) phosphine, methylphenylbis (methoxymethyl) silane, diphenylbis (methoxymethyl) silane, methylcyclohexylbis (methoxymethyl) silane, di-t-butylbis (methoxymethyl) ) Silane, cyclohexyl-t-butylbis (methoxymethyl) silane, i
-Propyl-t-butylbis (methoxymethyl) silane and the like.

These may be used in combination of two or more kinds. Of these, 1,3-diethers are preferably used, particularly 2,2-diisobutyl-1,3-dimethoxypropane, 2-isopropyl-2-isopentyl-1,3-dimethoxypropane (IPAMP), 2, 2-dicyclohexyl-1,3
-Dimethoxypropane, 2,2-bis (cyclohexylmethyl) -1,3-dimethoxypropane, 2-cyclohexyl-2-isopropyl-1,3-dimethoxypropane, 2-isopropyl-
2-s-butyl-1,3-dimethoxypropane, 2,2-diphenyl-
1,3-Dimethoxypropane and 2-cyclopentyl-2-isopropyl-1,3-dimethoxypropane are preferably used.

In the present invention, the above-mentioned organosilicon compound (ci) and polyether compound are used as the electron donor (C).
It can also be used in combination with (c-ii). Further, as the electron donor (C), other electron donors are used together with the organosilicon compound (ci) and / or the polyether compound (c-ii).
It is also possible to use (b) together.

As such another electron donor (b),
Specific examples thereof include the electron donor (a) shown in the preparation of the solid titanium catalyst component (A), the nitrogen-containing compound, the other oxygen-containing compound and the phosphorus-containing compound as described below.

Specific examples of the nitrogen-containing compound that can be used as the electron donor (b) include 2,6-substituted piperidines, 2,5-substituted piperidines, N, N, N ', N'. -Substituted methylenediamines such as tetramethylmethylenediamine, N, N, N ', N'-tetraethylmethylenediamine, 1,3-dibenzylimidazolidine and 1,3-dibenzyl-2-phenylimidazolidine .

Specific examples of the phosphorus-containing compound include triethyl phosphite, tri n-propyl phosphite, triisopropyl phosphite, tri n-butyl phosphite, triisobutyl phosphite, diethyl n-butyl phosphite and diethyl. Examples thereof include phosphite esters such as phenylphosphite.

Specific examples of the oxygen-containing compound include 2,
Examples thereof include 6-substituted tetrahydropyrans and 2,5-substituted tetrahydropyrans. Olefin Polymerization Catalyst (1) The olefin polymerization catalyst (1) used in the method for producing an olefin polymer according to the present invention comprises: (A) a solid titanium catalyst component, (B) an organometallic compound, and If necessary, it is formed from (C) an electron donor.

In the present invention, it is also possible to preliminarily polymerize an olefin having 2 or more carbon atoms to the catalyst component forming such an olefin polymerization catalyst (1) to form a prepolymerization catalyst before use.

Specific examples of the olefin having 2 or more carbon atoms to be prepolymerized include ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene,
Linear α-olefins such as 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-eicosene,
Cyclopentene, cycloheptene, norbornene, 5-ethyl-2-norbornene, tetracyclododecene, 2-ethyl-1,4,5,8-dimethano-1,2,3,4,4a, 5,8,8a-octa Cycloolefin such as hydronaphthalene, and further the following formula (i)
And the olefin represented by (ii).

[0089]

[Chemical 4]

Examples of the cycloalkyl group represented by X include a cyclopentyl group, a cyclohexyl group and a cycloheptyl group, and examples of the aryl group include a phenyl group, a tolyl group, a xylyl group and a naphthyl group.

The hydrocarbon group represented by R ¹ , R ² and R ³ is an alkyl group such as a methyl group, an ethyl group, a propyl group or a butyl group, an aryl group such as a phenyl group or a naphthyl group, or a norbornyl group. And so on. Further, the hydrocarbon group represented by R ¹ , R ² and R ³ may contain silicon or halogen.

Specific examples of the compound represented by the formula (i) or (ii) include 3-methyl-1-butene, 3-methyl-1-pentene, 3-ethyl-1-pentene, 4 -Methyl-1-pentene, 4-methyl-1-hexene, 4,4-dimethyl-1-hexene, 4,4-dimethyl-1-pentene, 4-ethyl-1-hexene,
Branched α-olefins such as 3-ethyl-1-hexene, allylnaphthalene, allylnorbornane, styrene, dimethylstyrenes, vinylnaphthalene, allyltoluenes, allylbenzene, vinylcyclohexane, vinylcyclopentane, vinylcycloheptane, allyl Examples thereof include vinyl compounds such as trialkylsilanes.

Of these, propylene, 1-butene, 1-
Pentene, 3-methyl-1-butene, 3-methyl-1-pentene,
3-ethyl-1-hexene, vinylcyclohexane, allyltrimethylsilane, dimethylstyrene and the like are preferable,
More preferred are propylene, 3-methyl-1-butene, vinylcyclohexyne and allyltrimethylsilane.

These may be a combination of two or more kinds. In the present invention, it is preferable to prepolymerize the above olefin in an amount of 0.01 to 2000 g, preferably 0.1 to 200 g, per 1 g of the solid titanium catalyst component (A) to form a prepolymerized catalyst.

The concentration of the solid titanium catalyst component (A) in the prepolymerization system is usually about 0.01 to 200 mmol, preferably about 0.05 to 100 mmol, in terms of titanium atom, per liter of the polymerization volume. Is desirable.

The organometallic compound catalyst component (B) is generally used in an amount of 0.1 to 100 mol, preferably 0.5 to 50 mol, per mol of titanium atom in the solid titanium catalyst component (A). it can. Further, the electron donor (C) is usually 0.1 to 50 mol, preferably 0.5, per mol of titanium atom.
It can be used in an amount of -30 mol, more preferably 1-10 mol.

The prepolymerization can be carried out under mild conditions by adding the above-mentioned olefin and catalyst component in the coexistence of a polymerization-inert hydrocarbon medium. As the hydrocarbon medium used in this case, specifically, aliphatic hydrocarbons such as propane, butane, isobutane, pentane, hexane, heptane, octane, decane, dodecane, hexadecane, octadecane; cyclopentane, cyclohexane, methylcyclo Alicyclic hydrocarbons such as pentane and cyclooctane; aromatic hydrocarbons such as benzene, toluene and xylene; petroleum fractions such as gasoline, kerosene, and light oil; halogenated hydrocarbons such as ethylene chloride and chlorobenzene, or these Combinations can be mentioned. Of these, it is particularly preferable to use an aliphatic hydrocarbon.

The reaction temperature in the prepolymerization is preferably a temperature at which the resulting prepolymer is not substantially dissolved in the inert hydrocarbon medium, and usually about -20 to +10.
Desirably, it is 0 ° C, preferably about -20 to + 80 ° C, more preferably 0 to + 40 ° C.

In the prepolymerization, a molecular weight modifier such as hydrogen can be used. In addition to the above components, other compounds useful for forming a prepolymerization catalyst can be used if necessary.

The prepolymerization may be carried out by a batch system, a semi-continuous system or a continuous system. Formation of Propylene-based Block Copolymer Component [I] In the present invention, when producing an olefin polymer, first, in the presence of the above-mentioned olefin polymerization catalyst (1) (or prepolymerization catalyst), [I- 1] a step of producing a crystalline polypropylene component by homopolymerizing propylene or copolymerizing propylene with another α-olefin;
[I-2] Low crystalline or non-crystalline ethylene.α-by copolymerizing ethylene with an α-olefin having 3 to 20 carbon atoms
The step of producing the olefin copolymer component is performed in any order to form the propylene block copolymer component [I].

Specifically, the olefin polymerization catalyst (1)
(Or a prepolymerization catalyst), first, [I-1] propylene is homopolymerized or propylene and another α-olefin are copolymerized to form a crystalline polypropylene component, and then [I-2] The propylene block copolymer component [I] can be formed by copolymerizing ethylene and α-olefin to form a low crystalline or non-crystalline ethylene / α-olefin copolymerization component.

[I-2] ethylene and α-olefin are copolymerized to obtain low crystalline or non-crystalline ethylene / α
-A propylene-based block copolymer by forming an olefin copolymerization component and then homopolymerizing [I-1] propylene or copolymerizing propylene and another α-olefin to form a crystalline polypropylene component. It is also possible to produce component [I].

In the present invention, the propylene block copolymer component [I] forms the [I-1] crystalline polypropylene component, and then [I-2] the low crystalline or amorphous ethylene.α-α- It is preferably produced by forming an olefin copolymerization component, which will be mainly described below.

In the step [I-1] for forming the crystalline polypropylene component, propylene is homopolymerized in the presence of the olefin polymerization catalyst (1) (or prepolymerization catalyst), or propylene and other α- Copolymerized with olefin.

Examples of such other α-olefins include:
Ethylene and α-olefins having 4 to 10 carbon atoms such as 1-butene, 1-pentene, 1-hexene, 1-octene, 1-
Decene, 3-methyl-1-butene, 3-methyl-1-pentene, 3-
Ethyl-1-pentene, 4-methyl-1-pentene, 4-methyl-1
-Hexene, 4,4-dimethyl-1-hexene, 4,4-dimethyl-1
-Pentene, 4-ethyl-1-hexene, 3-ethyl-1-hexene and the like.

Further, as long as the object of the present invention is not impaired, olefins other than the α-olefins shown as the prepolymerized olefins, and further the ethylene / α
-A small amount of the diene compound as shown in the olefin copolymerization step [I-2] may be used. These are 2
It is also possible to use a combination of two or more species.

The unit derived from such an olefin other than propylene finally becomes 5 in the polypropylene component.
It can be used so that it is present in an amount of less than mol%, preferably less than 4 mol%.

In the present invention, propylene is preferably homopolymerized in this step [I-1]. In the present invention, this step [I-1] can be performed in two or more stages by changing the reaction conditions.

In the step [I-1] for forming the crystalline polypropylene component, the solid titanium catalyst component (A) or the prepolymerization catalyst is converted into titanium atom per liter of polymerization volume in an amount of about 0.0001 to 50. Mmol preferably about 0.0
It is preferably used in an amount of 01 to 10 mmol.

The organometallic compound (B) is used in an amount of 1 to 2000 per 1 mol of titanium atom in the solid titanium catalyst component (A).
It can be used in an amount of preferably 2 to 1000 mol. The electron donor (C) is based on 1 mol of titanium atom,
0.001 to 5000 mol, preferably 0.05 to 1000
It can be used if necessary in a molar amount.

When a prepolymerization catalyst is used in this polymerization, the use of the organometallic compound (B) and the electron donor (C) is optional and may or may not be used, but these are added. Occasionally, it can be used in the above amounts relative to the concentration of titanium atoms in the polymerization system.

Further, the electron donor (C) added as necessary during this polymerization may be the same as or different from the electron donor (C) used in forming the prepolymerization catalyst. The step [I-1] as described above can be carried out by a solvent suspension polymerization method, a suspension polymerization method using a liquid propylene as a solvent, a gas phase polymerization method, etc., and a batch system, a semi-continuous system, It can be carried out by any of the continuous methods.

When carrying out the solvent suspension polymerization method, a polymerization-inert hydrocarbon can be used as a polymerization solvent. As such an inert hydrocarbon, specifically,
The hydrocarbons shown in the prepolymerization are mentioned, and aliphatic hydrocarbons are preferable.

The propylene polymerization step as described above is usually carried out at a temperature of about -50 to 200 ° C., preferably about 50 to 100 ° C., and usually atmospheric pressure to 100 kg / cm ^{2 and} preferably about ² to 50 kg / cm 2. It is carried out under a pressure of ² .

In this step [I-1], hydrogen (chain transfer agent) can be used to control the molecular weight of the obtained polypropylene. In the present invention, after forming the crystalline polypropylene component as described above, without performing the catalyst deactivation treatment used for the production of the polypropylene component, then ethylene and α-olefin are copolymerized to obtain a low crystalline or A non-crystalline ethylene / α-olefin copolymerization component is formed to form a propylene block copolymer.

In the step [I-2] for forming the low crystalline or amorphous ethylene / α-olefin copolymerization component,
Α-C3 to C20 used for copolymerization with ethylene
Examples of the olefin include propylene, 1-butene,
1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-eicosene, etc. It is also possible to use two or more types in combination. Among these, propylene, 1-butene, 1-octene, 1-pentene, 1-hexene, 4-methyl-1-pentene and the like are preferably used.

Ethylene and α-olefin are 1: 0.
It is desirable to use it in a molar ratio of 01 to 200, preferably 1: 0.05 to 50. In the copolymerization step [I-2] of ethylene and α-olefin, an olefin other than α-olefin as shown in the propylene polymerization step [I-1], within a range not impairing the object of the present invention, Further, a small amount of the following diene compound can be used.

Examples of such a diene compound include 1,3-butadiene, 1,3-pentadiene, 1,4-pentadiene, 1,3-hexadiene, 1,4-hexadiene, 1,5-hexadiene, 4 -Methyl-1,4-hexadiene, 5-methyl-1,4-
Hexadiene, 6-methyl-1,6-octadiene, 7-methyl-
1,6-octadiene, 6-ethyl-1,6-octadiene, 6-propyl-1,6-octadiene, 6-butyl-1,6-octadiene, 6-methyl-1,6-nonadiene, 7-methyl- 1,6-nonadiene, 6-ethyl-1,6-nonadiene, 7-ethyl-1,6-nonadiene, 6-methyl-1,6-decadiene, 7-methyl-1,6-decadiene, 6-methyl- Examples thereof include 1,6-undecadiene, 1,7-octadiene, 1,9-decadiene, isoprene, butadiene, ethylidene norbornene, vinyl norbornene and dicyclopentadiene. These may be used in combination of two or more.

In the copolymer system of ethylene and α-olefin, the polypropylene component is 10 to 1000 g, preferably 10 to 800 g, per liter of polymerization volume.
Particularly preferably, it is used in an amount of 30 to 500 g. The amount of this polypropylene is usually 0.0001 to 1 mmol per liter of polymerization volume, when converted to titanium atoms of the solid catalyst component (A) contained in the polypropylene.
It is preferably about 0.001-0.5 mmol.

In the present invention, a catalyst component may be further added to the copolymerization system of ethylene and α-olefin which is carried out in the presence of the polypropylene component containing the olefin polymerization catalyst (1). When the catalyst component is added, the solid titanium catalyst component (A) is added in an amount of 0.0001 to 20 mmol, preferably 0.001 to 1 mmol, per liter of the polymerization volume.
In an amount of 20 mmol, the electron donor (C) is polymerized in an amount of 0.001 to 5000 mol, preferably 0.01 to 1000 mol, per mol of the titanium atom in the polymerization system, and the organometallic compound (B) is polymerized. 1 to 20 per mol of titanium atom in the system
It can be appropriately used in an amount of 00 mol, preferably about 2 to 1000 mol.

The copolymerization of ethylene and α-olefin as described above may be carried out by a gas phase method or a liquid phase method, and may be carried out by a batch system, a semi-continuous system or a continuous system. Can be done. Further, this copolymerization can be carried out in two or more stages by changing the reaction conditions.

When the copolymerization step [I-2] is carried out by a solvent suspension polymerization method, the above-mentioned inert hydrocarbon can be used as a polymerization solvent. In the copolymerization step [I-2] of ethylene and α-olefin, the polymerization temperature is usually about −50 to 200 ° C., preferably about 20 to 100 ° C., and usually atmospheric pressure to 100 kg / cm ² , preferably about 2 It is carried out under a pressure of -50 Kg / cm ² .

At the time of copolymerization, hydrogen (chain transfer agent) may be added to adjust the molecular weight, if necessary. In addition, when the propylene-based block copolymer component [I] is produced by using the prepolymerization catalyst as described above, the unit (prepolymer) derived from the olefin formed by the prepolymerization is the final product. It is preferable that the propylene block copolymer component [I] obtained in 1) is contained in an amount of 0.001 to 3% by weight, preferably 0.005 to 2% by weight.

In the process for producing the propylene block copolymer component [I] as described above, the propylene block copolymer component [I] having a highly stereoregular polypropylene component can be obtained.

In the present invention, next, ethylene and 3 to 10 carbon atoms are used.
Copolymerized with 20 α-olefins to produce ethylene / α-
The olefin copolymer component [II] is formed, and (D) a transition metal compound containing a ligand having a cyclopentadienyl skeleton, and (E) (in the copolymerization system of ethylene and α-olefin). E-1) An olefin polymerization catalyst (2) comprising an organoaluminum oxy compound and / or (E-2) a Lewis acid or an ionic compound is added.

Regarding each component forming this olefin polymerization catalyst (2), the transition metal compound (D) shown below is used. The transition metal compound (D) containing a ligand having a cyclopentadienyl skeleton used in the present invention. (Hereinafter also referred to as metallocene compound (D)) is represented by the following formula (1).

ML _x (1) In the formula, M is a transition metal selected from Group IVB of the Periodic Table, specifically zirconium, titanium or hafnium, preferably zirconium.

L is a ligand that coordinates to the transition metal, at least one L is a group having a cyclopentadienyl skeleton, and x is the valence of the transition metal. Examples of the group having a cyclopentadienyl skeleton include cyclopentadienyl group, methylcyclopentadienyl group, dimethylcyclopentadienyl group, trimethylcyclopentadienyl group, tetramethylcyclopentadienyl group, pentamethylcyclo Pentadienyl group, ethylcyclopentadienyl group, methylethylcyclopentadienyl group, propylcyclopentadienyl group, methylpropylcyclopentadienyl group, butylcyclopentadienyl group, methylbutylcyclopentadienyl group, Examples thereof include alkyl-substituted cyclopentadienyl group such as hexylcyclopentadienyl group, indenyl group, 4,5,6,7-tetrahydroindenyl group and fluorenyl group.

These groups may be substituted with a halogen atom, a trialkylsilyl group or the like. Of these, alkyl-substituted cyclopentadienyl groups are particularly preferred.

When the compound represented by the formula (1) has two or more groups having a cyclopentadienyl skeleton as the ligand L, two groups having a cyclopentadienyl skeleton among them are ethylene groups. , An alkylene group such as propylene, a substituted alkylene group such as isopropylidene or diphenylmethylene, a silylene group or a dimethylsilylene group, a diphenylsilylene group, a substituted silylene group such as a methylphenylsilylene group, and the like.

The ligand L other than the group having a cyclopentadienyl skeleton is a hydrocarbon group having 1 to 12 carbon atoms, an alkoxy group, an aryloxy group, a trialkylsilyl group, S
It is an O ₃ R group (R is a hydrocarbon group having 1 to 8 carbon atoms which may have a substituent such as halogen), a halogen atom or a hydrogen atom. More specifically, as the hydrocarbon group having 1 to 12 carbon atoms, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, t-butyl group, pentyl Groups, hexyl groups, octyl groups, 2-ethylhexyl groups, alkyl groups such as decyl groups,
Examples thereof include cycloalkyl groups such as cyclopentyl group and cyclohexyl group, aryl groups such as phenyl group and tolyl group, and aralkyl groups such as benzyl group and neofil group.

Examples of the alkoxy group include methoxy group, ethoxy group, n-propoxy group, isopropoxy group, n-butoxy group, isobutoxy group, sec-butoxy group, t-butoxy group, pentoxy group, hexoxy group and octoxy group. Examples of the aryloxy group include a phenoxy group and the like, examples of the trialkylsilyl group include a trimethylsilyl group, a triethylsilyl group, and a triphenylsilyl group, and examples of the halogen include fluorine, chlorine, and
Examples include bromine and iodine.

Examples of the SO ₃ R group include a p-toluenesulfonato group, a methanesulfonato group and a trifluoromethanesulfonato group. Such a metallocene compound (D) has a valence of 4 for the transition metal,
More specifically, it is represented by the following general formula (2).

R ² _k R ³ _l R ⁴ _m R ⁵ _n M (2) (wherein M is the same as in the above formula (1), R ² is a group having a cyclopentadienyl skeleton (coordination) Child) and R ³ ,
R ⁴ and R ⁵ are groups having a cyclopentadienyl skeleton or groups shown as other ligands in the formula (1), k is an integer of 1 or more, and k + l + m + n = 4. ) In the present invention, among the compounds represented by the above formula (2),
A metallocene compound in which at least one of R ³ , R ⁴ and R ⁵ is a group having a cyclopentadienyl skeleton, that is, a metallocene compound having at least two groups having a cyclopentadienyl skeleton is preferably used.
Further, as described above, the group having two cyclopentadienyl skeletons may be bonded via an alkylene group, a substituted alkylene group, a silylene group or a substituted silylene group.

Specific examples of the metallocene compound (D) include bis (cyclopentadienyl) zirconium dichloride and bis (methylcyclopentadienyl).
Zirconium dichloride, bis (ethylcyclopentadienyl) zirconium dichloride, bis (n-propylcyclopentadienyl) zirconium dichloride, bis (n-butylcyclopentadienyl) zirconium dichloride, bis (n-hexylcyclopentadienyl) Zirconium dichloride, bis (methyl-n-propylcyclopentadienyl) zirconium dichloride, bis (methyl
-n-butylcyclopentadienyl) zirconium dichloride, bis (dimethyl-n-butylcyclopentadienyl) zirconium dichloride, bis (n-butylcyclopentadienyl) zirconium dibromide, bis (n-butylcyclopentadienyl) ) Zirconium methoxy chloride, bis (n-butylcyclopentadienyl) zirconium ethoxy chloride, bis (n-butylcyclopentadienyl) zirconium butoxycyclolide, bis (n-butylcyclopentadienyl) zirconium ethoxide, bis (n -Butylcyclopentadienyl) zirconium methyl chloride, bis (n-butylcyclopentadienyl) zirconium dimethyl, bis (n-butylcyclopentadienyl) zirconium benzyl chloride, bis (n-butylcyclopentadienyl) zirconi Mujibenjiru, bis (n- butylcyclopentadienyl) zirconium phenyl chloride, bis (n- butylcyclopentadienyl) zirconium hydride chloride, Bis (indenyl)
Zirconium dichloride, bis (indenyl) zirconium dibromide, bis (indenyl) zirconium bis (p-toluenesulfonato), bis (4,5,6,7-tetrahydroindenyl) zirconium dichloride, bis (fluorenyl) zirconium dichloride, ethylene Bis (indenyl) zirconium dichloride, ethylenebis (indenyl) zirconium dibromide, ethylenebis (indenyl) dimethylzirconium, ethylenebis (indenyl) diphenylzirconium, ethylenebis (indenyl) methylzirconium monochloride, ethylenebis (indenyl) zirconium bis ( Methanesulfonato), ethylenebis (indenyl) zirconium bis (p-toluenesulfonato), ethylenebis (indenyl) zirconium bis (trif Oromethanesulfonato), ethylenebis (4,5,6,7-tetrahydroindenyl) zirconium dichloride, isopropylidene (cyclopentadienyl-fluorenyl) zirconium dichloride, isopropylidene (cyclopentadienyl-methylcyclopentadienyl) ) Zirconium dichloride, dimethyl silylene bis (cyclopentadienyl) zirconium dichloride, dimethyl silylene bis (methylcyclopentadienyl) zirconium dichloride, dimethyl silylene bis (dimethylcyclopentadienyl) zirconium dichloride, dimethyl silylene bis (trimethylcyclopentadienyl) (Enyl) zirconium dichloride, dimethyl silylene bis (indenyl) zirconium dichloride, dimethyl silylene bis (indenyl) zirconium bis ( Lifluoromethanesulfonato), dimethyl silylene bis (4,5,6,7-tetrahydroindenyl) zirconium dichloride, dimethyl silylene (cyclopentadienyl-fluorenyl) zirconium dichloride, diphenyl silylene bis (indenyl) zirconium dichloride, methylphenyl Silylene bis (indenyl) zirconium dichloride, bis (cyclopentadienyl) zirconium dichloride, bis (cyclopentadienyl) zirconium dibromide, bis (cyclopentadienyl)
Methylzirconium monochloride, bis (cyclopentadienyl) ethylzirconium monochloride, bis (cyclopentadienyl) cyclohexylzirconium monochloride, bis (cyclopentadienyl) phenylzirconium monochloride, bis (cyclopentadienyl)
Benzyl zirconium monochloride, bis (cyclopentadienyl) zirconium monochloride, bis (cyclopentadienyl) methylzirconium monohydride, bis (cyclopentadienyl) dimethylzirconium, bis (cyclopentadienyl) diphenylzirconium, Bis (cyclopentadienyl) dibenzylzirconium, bis (cyclopentadienyl)
Zirconium methoxy chloride, bis (cyclopentadienyl) zirconium ethoxy chloride, bis (cyclopentadienyl) zirconium bis (methanesulfonato), bis (cyclopentadienyl) zirconium bis (p-toluenesulfonato), bis (cyclo Pentadienyl) zirconium bis (trifluoromethanesulfonato), bis (methylcyclopentadienyl) zirconium dichloride, bis (dimethylcyclopentadienyl)
Zirconium dichloride, bis (dimethylcyclopentadienyl) zirconium ethoxy chloride, bis (dimethylcyclopentadienyl) zirconium bis (trifluoromethanesulfonate), bis (ethylcyclopentadienyl) zirconium dichloride, bis (methylethylcyclopentadiene) (Enyl) zirconium dichloride, bis (propylcyclopentadienyl) zirconium dichloride, bis (methylpropylcyclopentadienyl)
Zirconium dichloride, bis (butylcyclopentadienyl) zirconium dichloride, bis (methylbutylcyclopentadienyl) zirconium dichloride, bis (methylbutylcyclopentadienyl) zirconium bis (methanesulfonate), bis (trimethylcyclopentadienyl) ) Zirconium dichloride, bis (tetramethylcyclopentadienyl) zirconium dichloride,
Bis (pentamethylcyclopentadienyl) zirconium dichloride, bis (hexylcyclopentadienyl)
Examples thereof include zirconium dichloride and bis (trimethylsilylcyclopentadienyl) zirconium dichloride. In the above example, the disubstituted product of the cyclopentadienyl ring includes 1,2- and 1,3-substituted products, and the trisubstituted product is 1,2,3- and 1,2,4-substituted products. Including.

In the above, the metallocene compound in which M is zirconium is exemplified, but a metallocene compound in which zirconium in the above compound is replaced with titanium or hafnium can also be mentioned.

Among these, bis (n-propylcyclopentadienyl) zirconium dichloride and bis (n-
Butylcyclopentadienyl) zirconium dichloride, bis (1-methyl-3-n-propylcyclopentadienyl) zirconium dichloride, bis (1-methyl-3-n-butylcyclopentadienyl) zirconium dichloride, etc. are preferably used. To be

In the present invention, the metallocene compound (D)
Alternatively, a compound represented by the following formula (3) can be used. L ^a MX ₂ (3) (M is a metal of Group IV or lanthanide series of the periodic table, L ^a is a derivative of a delocalized π-bond group, and has a constrained geometric shape at the metal M active site. And X is independently hydrogen, or a hydrocarbon group containing 20 or less carbon, silicon or germanium, a silyl group or a germyl group.) Such a compound represented by the formula (3) Of these, specifically, the compound represented by the following formula (4) is preferable.

[0139]

Embedded image

M is titanium or zirconium, and X
Is the same as above. Cp is a substituted cyclopentadienyl group or a derivative thereof which is π-bonded to M and has a substituent Z.

Z is oxygen, sulfur, boron or an element of Group IVA of the periodic table, Y is a ligand containing nitrogen, phosphorus, oxygen or sulfur, and Z and Y form a condensed ring. Good.

Specific examples of the compound represented by the formula (4) include (dimethyl (t-butylamido) (tetramethyl-η ⁵ -cyclopentadienyl) silane) dibenzylzirconium and (dimethyl (t -Butylamido) (tetramethyl-η ⁵ -cyclopentadienyl) silane) dibenzyl titanium, (dimethyl (t-butylamido) (tetramethyl-η ⁵ -cyclopentadienyl) silane) dimethyl titanium, ((t-butylamide ) (Tetramethyl-η ⁵ -cyclopentadienyl) -1,2-ethanediyl) dimethyl zirconium, ((t-butylamido) (tetramethyl-η ^5-
Cyclopentadienyl) -1,2-ethanediyl) dibenzyltitanium, ((methylamido) (tetramethyl-η ⁵ -cyclopentadienyl) -1,2-ethanediyl) dibenzhydrylzirconium, ((methylamido) ( Tetramethyl-η ⁵ -cyclopentadienyl) -1,2-ethanediyl) dineopentyl titanium, ((phenylphosphide) (tetramethyl-η ⁵ -cyclopentadienyl) methylene) diphenyl titanium, (dibenzyl (t -Butylamido) (tetramethyl-η ⁵ -cyclopentadienyl) silane) dibenzylzirconium, (dimethyl (benzylamide) (η
⁵ -cyclopentadienyl) silane) di (trimethylsilyl) titanium, (dimethyl (phenylphosphide)-(tetramethyl-η ⁵ -cyclopentadienyl) silane) dibenzylzirconium, (dimethyl (t-butylamide)
(Tetramethyl-η ⁵ -cyclopentadienyl) silane)
Dibenzyl hafnium, ((tetramethyl-η ⁵ -cyclopentadienyl) -1,2-ethanediyl) dibenzyl titanium, (2-η ^5- (tetramethyl-cyclopentadienyl)-
1-Methyl-ethanolate (2-)) dibenzyltitanium, (2-
η ^5- (Tetramethyl-cyclopentadienyl) -1-methyl
-Ethanolate (2-)) dibenzylzirconium, (2-η ⁵
-(Tetramethyl-cyclopentadienyl) -1-methyl-ethanolate (2-)) dimethylzirconium, (2-((4a, 4
b, 8a, 9,9a-η) -9H-fluoren-9-yl) cyclohexanolate (2-)) dimethyl titanium, (2-((4a, 4b, 8a, 9,9a
−η) -9H-Fluoren-9-yl) cyclohexanolate (2
-)) Dimethyl zirconium, (2- ((4a, 4b, 8a, 9,9a-
η) -9H-Fluoren-9-yl) cyclohexanolate (2
-)) Dibenzyl zirconium and the like.

In the present invention, the metallocene compound (D) as described above may be used in combination of two or more kinds. (E-1) Organoaluminum Oxy Compound The (E-1) organoaluminum oxy compound which forms the olefin polymerization catalyst (2) used in the present invention may be a conventionally known aluminoxane. 786
It may be a benzene-insoluble organoaluminum oxy compound as exemplified in Japanese Patent Publication No. 87.

The conventionally known aluminoxane can be produced, for example, by the following method. (1) Compounds containing adsorbed water or salts containing water of crystallization, such as magnesium chloride hydrate, copper sulfate hydrate, aluminum sulfate hydrate, nickel sulfate hydrate, ceric chloride hydrate, etc. A method in which an organoaluminum compound such as trialkylaluminum is added to the hydrocarbon medium suspension and reacted. (2) A method in which water, ice or water vapor is allowed to directly act on an organoaluminum compound such as trialkylaluminum in a medium such as benzene, toluene, ethyl ether or tetrahydrofuran. (3) A method of reacting an organoaluminum compound such as trialkylaluminum with an organotin oxide such as dimethyltin oxide or dibutyltin oxide in a medium such as decane, benzene or toluene.

The aluminoxane may contain a small amount of organic metal component. Further, the solvent or the unreacted organoaluminum compound may be removed by distillation from the recovered solution of the aluminoxane, and then redissolved in the solvent or suspended in the poor solvent of the aluminoxane.

Specific examples of the organoaluminum compound used for preparing the aluminoxane include trimethylaluminum, triethylaluminum, tripropylaluminum, triisopropylaluminum, tri-n-butylaluminum, triisobutylaluminum, trisec-butyl. Aluminum, tritert-butylaluminum, tripentylaluminum, trihexylaluminum, trioctylaluminum, trialkylaluminum such as tridecylaluminum, tricycloalkylaluminum such as tricyclohexylaluminum, tricyclooctylaluminum, dimethylaluminum chloride, diethylaluminum. Chloride, diethyl aluminum bromide, diisobutyl aluminum chloride, etc. Alkylaluminum halides, diethylaluminum hydride, dialkylaluminum hydride such as diisobutylaluminum hydride, dimethyl aluminum methoxide, dialkylaluminum alkoxides such as diethylaluminum ethoxide and dialkylaluminum Ally Loki Sid such as diethyl aluminum phenoxide and the like.

Of these, trialkylaluminum and tricycloalkylaluminum are preferable, and trimethylaluminum is particularly preferable. Further, as the organoaluminum compound used when preparing the aluminoxane, isoprenylaluminum represented by the following general formula can also be used.

[0148] _{(i-C 4 H 9)} x Al y (C 5 H 10) z ... [II] ( wherein, x, y, z are each a positive number, and z ≧ 2x.) Above Such organoaluminum compounds may be used alone or in combination.

Solvents used for the aluminoxane solution or suspension include benzene, toluene, xylene,
Aromatic hydrocarbons such as cumene and cymene, aliphatic hydrocarbons such as pentane, hexane, heptane, octane, decane, dodecane, hexadecane and octadecane, alicyclic hydrocarbons such as cyclopentane, cyclohexane, cyclooctane and methylcyclopentane , Petroleum fractions such as gasoline, kerosene, and light oil, or halides of the above aromatic hydrocarbons, aliphatic hydrocarbons, and alicyclic hydrocarbons, and particularly hydrocarbon solvents such as chlorinated compounds and brominated compounds. Further, ethers such as ethyl ether and tetrahydrofuran can also be used. Of these solvents, aromatic hydrocarbons or aliphatic hydrocarbons are particularly preferable.

Further, in the benzene-insoluble organoaluminum oxy compound used in the present invention, the Al component dissolved in benzene at 60 ° C. is usually 10% or less, preferably 5% or less, particularly preferably 2% or less in terms of Al atom, Insoluble or sparingly soluble in benzene.

(E-2) Lewis Acid or Ionic Compound The Lewis acid or ionic compound (E-2) forming the olefin polymerization catalyst (2) is described in JP-A-1-501950.
Japanese Patent Laid-Open No. 1-502036, Japanese Patent Laid-Open No. 3-1
79005, JP-A-3-179006, JP-A-3-207703, and JP-A-3-207704.
Examples thereof include Lewis acids, ionic compounds and carborane compounds described in JP-A No. 547718 and the like.

Specifically, the Lewis acid is BR
₃ (R is a phenyl group which may have a substituent such as fluorine, a methyl group, a trifluoromethyl group or fluorine), and examples thereof include trifluoroboron, triphenylboron, Tris (4-fluorophenyl) boron, Tris (3,5-difluorophenyl) boron, Tris (4-fluoromethylphenyl) boron, Tris (pentafluorophenyl) boron, Tris (p-tolyl) boron, Tris (o- Trily) boron, tris (3,5-dimethylphenyl) boron and the like.

Examples of the ionic compound include trialkyl-substituted ammonium salts, N, N-dialkylanilinium salts, dialkylammonium salts and triarylphosphonium salts.

Specific examples of the trialkyl-substituted ammonium salt include, for example, triethylammonium tetra (phenyl) boron, tripropylammonium tetra (phenyl) boron, tri (n-butyl) ammonium tetra (phenyl) boron and trimethylammonium tetra ( p-Tolyl) boron, trimethylammonium tetra (o-tolyl) boron, tributylammonium tetra (pentafluorophenyl) boron, tripropylammonium tetra (o, p-dimethylphenyl) boron, tributylammonium tetra (m, m-dimethylphenyl) ) Boron, tributylammonium tetra (p-trifluoromethylphenyl) boron, tri (n-butyl) ammonium tetra (o-tolyl) boron, and the like.

As the N, N-dialkylanilinium salt,
For example N, N-dimethylanilinium tetra (phenyl)
Boron, N, N-diethylanilinium tetra (phenyl)
Examples thereof include boron and N, N-2,4,6-pentamethylanilinium tetra (phenyl) boron.

Examples of the dialkyl ammonium salt include di (1-propyl) ammonium tetra (pentafluorophenyl) boron and dicyclohexylammonium tetra (phenyl) boron.

Further, as the ionic compound (b), triphenylcarbenium tetrakis (pentafluorophenyl) boronate, N, N-dimethylanilinium tetrakis (pentafluorophenyl) borate, ferrocenium tetra (pentafluorophenyl) borate, etc. You can also mention

Further, the following compounds may be mentioned as the ionic compound. Bis [tri (n-butyl) ammonium] nonaborate, Bis [tri (n-butyl) ammonium] decaborate, Bis [tri (n-butyl) ammonium] undecaborate, Bis [tri (n-
Butyl) ammonium] dodecaborate, bis [tri (n-butyl) ammonium] decachlorodecaborate,
Bis [tri (n-butyl) ammonium] dodecachlorododecaborate, tri (n-butyl) ammonium 1-carbadecaborate, tri (n-butyl) ammonium 1-carbaundecaborate, tri (n-butyl) ammonium 1 -Carbadodecaborate, tri (n-butyl) ammonium 1-
Anion salts such as trimethylsilyl-1-carbadecaborate and tri (n-butyl) ammonium bromo-1-carbadodecaborate (in the above, compounds having a counter ion of tri (n-butyl) ammonium are exemplified. ,
The counterion is not limited to this. ), Decaborane (14), 7,8-Dicarbaundecaborane (1
3), 2,7-dicarbaundecaborane (13), undecahydride-7,8-dimethyl-7,8-dicarbaundecaborane, dodecahydride-11-methyl-2,7-dicarbaundecaborane, Tri (n-butyl) ammonium 6-carbadecaborate (14), tri (n-butyl) ammonium 6-
Carbadecaborate (12), tri (n-butyl) ammonium 7-carbaundecaborate (13), tri (n-butyl) ammonium 7,8-dicarbaundecaborate (1
2), tri (n-butyl) ammonium 2,9-dicarbaundecaborate (12), tri (n-butyl) ammonium dodecahydride-8-methyl-7,9-dicarbaundecaborate, tri (n-butyl) ) Ammonium undecahydride-8-ethyl-7,9-dicarbaundecaborate, tri (n-butyl) ammonium undecahydride-8-butyl-7,9-dicarbaundecaborate, tri (n-butyl) ammonium Undeca hydride-8-allyl-7,9-
Dicarbaundecaborate, tri (n-butyl) ammonium undecahydride-9-trimethylsilyl-7,8-dicarbaundecaborate, tri (n-butyl) ammonium undecahydride-4,6-dibromo-7-carbaun Borane such as decaborate, carborane complex compound or salt of carborane anion, 4-carbanonaborane (14),
1,3-dicarbanonaborane (13), 6,9-dicarbadecaborane (14), dodecahydride-1-phenyl-1,3-dicarbanonaborane, dodecahydride-1-methyl-1,3 -
Carboranes or salts of carboranes such as dicarbanonaborane, undecahydride-1,3-dimethyl-1,3-dicarbanonaborane, tri (n-butyl) ammonium bis (nonahydride-1,3-dicarbanona Borate) cobaltate (III), tri (n-butyl) ammonium bis (undecahydride-7,8-dicarbaundecaborate) ferrate (III), tri (n-butyl) ammonium bis (undecahydride) -7,8-Dicarbaundecaborate) Cobaltate (III), tri (n-butyl) ammonium bis (undecahydride-7,8-dicarbaundecaborate) nickelate (III), tri (n- Butyl) ammonium bis (undecahydride-7,8-dicarbaundecaborate) cuprate (III), tri (n-butyl) ammonium bis (undecahydride-7,8-dicarbaun) Caborate) aurate (III), tri (n-butyl) ammonium bis (nonahydride-7,8-dimethyl-7,8-dicarbaundecaborate) ferrate (III), tri (n-butyl) ammonium Bis (nonahydride-7,8-dimethyl-7,8-dicarbaundecaborate) chromate (II
I), tri (n-butyl) ammonium bis (tribromooctahydride-7,8-dicarbaundecaborate) cobaltate (III), tri (n-butyl) ammonium bis (dodecahydride dodecaborate) cobaltate (III), bis [tri (n-butyl) ammonium] bis (dodecahydride dodecaborate) nickelate (III), tris [tri (n-butyl) ammonium] bis (undecahydride-7-carbaundecaborate) )
Chromate (III), bis [tri (n-butyl) ammonium] bis (undecahydride-7-carbaundecaborate) manganate (IV), bis [tri (n-butyl)]
Ammonium] bis (undecahydride-7-carbaundecaborate) cobaltate (III), bis [tri (n-butyl) ammonium] bis (undecahydride-7-carbaundecaborate) nickelate (IV ) And salts of metal carboranes or metal borane anions.

Two or more kinds of the above compounds may be used in combination. Olefin Polymerization Catalyst (2) The olefin polymerization catalyst (2) used in the present invention comprises a metallocene compound (D) as described above, an organoaluminumoxy compound (E-1) and / or a Lewis acid or an ionic compound. (E-2) and.

In the present invention, when forming the olefin polymerization catalyst (2), the organoaluminum oxy compound (E-1) is used.
And Lewis acid or the ionic compound (E-2) can be used in combination.

Further, in the present invention, a catalyst for olefin polymerization is used.
When forming (2), the metallocene compound (D),
If necessary, an organoaluminum compound, a carrier and the like can be used together with the organoaluminum oxy compound (E-1) and / or the Lewis acid or the ionic compound (E-2).

Specific examples of the organoaluminum compound include the same compounds as the organoaluminum compound (B) used for forming the olefin polymerization catalyst (1).

The carrier used in the present invention is an inorganic or organic compound, and a granular or fine particle solid having a particle size of 10 to 300 μm, preferably 20 to 200 μm is used. Among these, porous oxides are preferable as the inorganic carrier, and specifically, SiO ₂ , Al ₂ O ₃ , Mg
O, ZrO ₂ , TiO ₂ , B ₂ O ₃ , CaO, ZnO, Ba
O, ThO ₂ etc. or mixtures thereof, eg Si
_{O 2 -MgO, SiO 2 -Al 2} O 3, SiO 2 -TiO 2, S
iO ₂ -V ₂ O ₅ , SiO ₂ -Cr ₂ O ₃ , SiO ₂ -TiO ₂ -M
Examples thereof include gO. Of these, SiO
Those containing ₂ and / or Al ₂ O ₃ as a main component are preferable.

The above inorganic oxide is a small amount of Na.₂C
O₃, K₂CO₃, CaCO₃, MgCO₃, Na₂SO_Four,
Al₂(SO_Four)₃, BaSO_Four, KNO₃, Mg (NO₃)₂,
Al (NO ₃)₃, Na₂O, K₂O, Li₂Carbonic acid such as O
May contain salts, sulfates, nitrates and oxides
Yes.

The properties of such a carrier vary depending on the type and production method, but the specific surface area is 50 to 1000 m ² / g.
It is preferably 100 to 700 m ² / g, and the pore volume is preferably 0.3 to 2.5 cm ² / g. Further, this carrier is used by firing at 100 to 1000 ° C., preferably 150 to 700 ° C., if necessary.

The organic carrier has a particle size of 10 to 30.
A solid organic compound in the form of granules or fine particles having a size of 0 μm can be mentioned. Examples of these organic compounds include (co) polymers produced mainly from α-olefins having 2 to 14 carbon atoms such as ethylene, propylene, 1-butene, and 4-methyl-1-pentene, or vinylcyclohexane and styrene. The (co) polymer produced as a main component can be mentioned.

In the present invention, the metallocene compound (D), the organoaluminum oxy compound (E-1) and / or the Lewis acid or the ionic compound (E-2) (hereinafter also referred to as the component (E)) are used as described above. A carrier-supported olefin polymerization catalyst (2) formed by using a different carrier is preferably used.

When the olefin polymerization catalyst (2) is formed from the above components, the order of contacting the components is arbitrary, but preferably the carrier and the component (E) are mixed and contacted, The metallocene compound (D) is mixed and brought into contact with the organoaluminum compound.

The above components can be contacted with each other in a hydrocarbon solvent inert to the reaction. When the catalyst for olefin polymerization (2) is formed using a carrier, 1 g of the carrier is used.
Per metallocene compound (D) is 5 × 10 ^{−6 to} 5 × 10
It is desirable to form a supported catalyst in an amount of ^-4 gram atom (transition metal atom derived from metallocene compound (D)), preferably 1 x 10 ^-5 to 2 x 10 ^-4 gram atom.

The amount of aluminum per 1 g of the carrier is 10 ^{-3 to} 5 × 10 ^-2 gram atom, preferably 2 × 10 5, in terms of the total of aluminum in the component (E-1) and aluminum in the organoaluminum compound. It is preferably used in an amount of ^{-3 to} 2 x 10 ^-2 gram atom.

These components are contacted at a temperature of usually -50 to 150 ° C, preferably -20 to 120 ° C, for 1 minute to 50 hours, preferably 10 minutes to 25 hours to form a catalyst supported on a carrier. be able to.

The olefin polymerization catalyst (2) used in the present invention can also be used after preliminarily polymerizing an olefin with the above catalyst component to form a prepolymerization catalyst.

This prepolymerization can be carried out in the same manner as the prepolymerization of the olefin polymerization catalyst (1) except that the catalyst component is changed. As the prepolymerized olefin, the same olefins as those used in the prepolymerization of the olefin polymerization catalyst (1) can be used, but among these, ethylene and α-olefins used in the main polymerization are preferably used. To be

In the prepolymerization, it is desirable to prepolymerize the above olefin in an amount of 1 to 100,000 g, preferably 2 to 50,000 g, per 1 g of metallocene compound (D) to form a prepolymerized catalyst.

The concentration of the metallocene compound (D) in the prepolymerization system is usually 1 × 10 per liter of polymerization volume.
^{-6 to} 2 x 10 ^-2 mol / liter, preferably 5 x 10 ^-5 to
It is preferably used in an amount of 10 ^-2 mol / l.

Component (E) is an atomic ratio (Al or B / transition metal) to the transition metal in the metallocene compound (D),
Usually, it is desirable to use it in an amount of 10 to 500, preferably 20 to 200.

The carrier is optionally used in the amount as described above, and the organoaluminum compound is the component (E).
Atomic ratio to aluminum or boron (Al /
Al or B) is usually 0.02 to 3, preferably 0.05.
It can be used as necessary in an amount of about 1.5.

Prepolymerization is carried out at -20 to 80 ° C, preferably 0.
At a temperature of -60 ° C for 0.5-100 hours, preferably 1-
It can be done for about 50 hours. Preliminary polymerization can be carried out in the presence of each catalyst component as described above, for example, by introducing an olefin into a polymerization-inert hydrocarbon solvent, and specifically when a catalyst supported on a carrier is used. It can be done as follows.

Component (E) is added to the carrier suspension in which hydrocarbon is suspended, and the mixture is reacted for a predetermined time. The supernatant is then removed and the solid component obtained is resuspended in hydrocarbon. The metallocene compound (D) is added to the system and reacted for a predetermined time, and then the supernatant liquid is removed to obtain a solid catalyst component. Then, the preliminarily polymerized catalyst can be obtained by adding the solid catalyst component obtained above to the hydrocarbon containing the organoaluminum compound, and introducing the olefin therein to polymerize.

The prepolymerization can be carried out batchwise or continuously, and can be carried out under reduced pressure, normal pressure or under pressure. In the prepolymerization,
A molecular weight regulator such as hydrogen can also be used.

Ethylene / α-olefin copolymer component
Formation of [II] In the present invention, the above-mentioned olefin polymerization catalyst (2) is added to the polymerization system to copolymerize ethylene with an α-olefin having 3 to 20 carbon atoms to obtain a low crystalline or non-crystalline compound. The crystalline ethylene / α-olefin copolymer component [II] is formed.

3 carbon atoms used for copolymerization with ethylene
Specific examples of the α-olefin of 20 to 20 include those similar to the α-olefin shown in the above-mentioned copolymerization step [I-2] of ethylene and α-olefin.
It is also possible to use a combination of two or more species. Among these, 1-butene, 1-octene, 1-pentene, 1-hexene,
4-Methyl-1-pentene and the like are preferably used.

The α-olefin may be the same as or different from the α-olefin used in the copolymerization step [I-2]. When forming the ethylene / α-olefin copolymer component [II], the ethylene and the α-olefin are in the ratio of 1: 0.01 to 200, preferably 1: 0.05.
It is desirable to use it at a molar ratio of -50.

The copolymerization step [II] of ethylene and α-olefin can be carried out by any of liquid phase polymerization methods such as gas phase polymerization method, suspension polymerization method and solution polymerization method. It can be carried out in any of a system and a continuous system.

In the suspension polymerization, a polymerization inert hydrocarbon may be used as the polymerization solvent, or the olefin itself may be used as the solvent. As this hydrocarbon, a polymerization-inert hydrocarbon as shown in the prepolymerization of the olefin polymerization catalyst (1) can be used. Of these, aliphatic hydrocarbons and alicyclic hydrocarbons can be used. , Petroleum fractions and the like are preferably used.

In the present invention, when the compound represented by the formula (3) is used as the metallocene compound (D) added to the copolymerization system of ethylene and α-olefin, the gas phase polymerization method is used. Is preferred, and when the compound represented by the formula (4) is used, it is preferably carried out by a solution polymerization method.

In the polymerization system, the metallocene compound (D)
Alternatively, the prepolymerization catalyst is used in an amount of about 1 × 10 ⁻⁸ to 1 × 10 ⁻³ gram atom, preferably 1 × 10 ⁻⁷ to 1 × 10 ⁻⁴ gram atom, as the concentration of transition metal atoms per liter of the polymerization volume. It is desirable to be used. The component (E) is an atomic ratio (Al or B) with the transition metal in the metallocene compound (D).
/ Transition metal), usually 10 to 500, preferably 20 to 2
It is desirable to use it in an amount of 00. The olefin polymerization catalyst (2) is preferably a catalyst supported on a carrier as described above.

When the prepolymerization catalyst is used during the copolymerization of ethylene and α-olefin, the use of the component (E) is optional and may or may not be used, but the component (E) is added. In this case, it can be used in an amount of 10 to 500, preferably 20 to 200, relative to the transition metal in the polymerization system.

The amount of the organoaluminum compound is such that the atomic ratio (Al / Al or B) to aluminum or boron in the component (E) is usually 0.02 to 3, preferably 0.05 to 1.5. Can be added according to need.

The copolymerization of ethylene and α-olefin is
In the liquid phase polymerization method, it is usually -50 to 150 ° C, preferably 0 to
At 120 ° C., the gas phase polymerization method is usually carried out at a temperature of 0 to 120 ° C., preferably 20 to 100 ° C.

The copolymerization is usually carried out at atmospheric pressure to 100.
kg / cm²Preferably 2 to 50 kg / cm ²Under pressure conditions
Be played. As mentioned above, the presence of the catalyst for olefin polymerization (2)
When ethylene and α-olefin are copolymerized under the presence of
Ethylene / α-olefin copolymer component with narrow composition distribution
[II] can be formed.

The olefin polymer obtained by the method for producing an olefin polymer according to the present invention as described above is excellent not only in mechanical strength such as rigidity but also in impact strength.

Further, the olefin polymer according to the present invention is
It has excellent transparency and heat resistance, and can be used for a wide range of applications by molding it into various molded products. Melt flow rate MFR (ASTM
D1238: 230 ° C, 2.16 kg load) is 0.0
1 to 500 g / 10 minutes, preferably 0.05 to 300 g / 10
Minutes are desirable.

The bulk specific gravity of the olefin polymer is 0.2
0-0.70 g / ml, preferably 0.25-0.65 g / ml
It is preferably ml. The olefin polymer according to the present invention can be used by adding other components within a range that does not impair the object of the present invention.

As such other component, a thermoplastic resin or a thermosetting resin can be mentioned, and specifically, polyethylene, polypropylene other than the above, poly 1-
Α-olefin homopolymer such as butene or α-olefin copolymer, copolymer of α-olefin and vinyl monomer, modified olefin polymer such as maleic anhydride modified polypropylene, nylon, polycarbonate,
Examples thereof include ABS, polystyrene, polyvinyl chloride, polyphenylene oxide, petroleum resin, and phenol resin.

Further, the olefin polymer according to the present invention is
You may add and use various additives. Examples of such additives include nucleating agents, heat stabilizers, phenol-based agents,
Such as sulfur-based and phosphorus-based antioxidants, lubricants, antistatic agents, dispersants, copper damage inhibitors, neutralizing agents, foaming agents, plasticizers, anti-foaming agents, flame retardants, crosslinking agents, peroxides, etc. Flowability improver, UV absorber, light resistance stabilizer, weather resistance stabilizer, weld strength improver, slip agent, antiblocking agent, antifogging agent, lubricant, dye, pigment, natural oil, synthetic oil, wax, filler, A rubber component etc. can be mentioned.

[0197]

According to the method for producing an olefin polymer according to the present invention as described above, an olefin polymer excellent in mechanical strength such as rigidity, moldability, heat resistance and impact strength is obtained. You can

Further, in the present invention, since the yield of the olefin polymer is high with respect to the unit amount of the solid titanium catalyst component, the content of the catalyst residue in the produced polymer, particularly the halogen content can be relatively reduced. Therefore, it is possible to omit the operation of removing the catalyst in the olefin polymer produced,
When the obtained olefin polymer is molded, rusting of the mold can be suppressed.

[0199]

EXAMPLES The present invention will now be specifically described with reference to examples, but the present invention is not limited to these examples.

Preparation of olefin polymerization catalyst (1) [ Preparation of solid titanium catalyst component (A)] Anhydrous magnesium chloride (95.2 g), decane (442 ml) and 2-ethylhexyl alcohol (390.6 g) were heated at 130 ° C. for 2 hours. After carrying out a uniform solution, 21.3 g of phthalic anhydride was added to this solution, and the mixture was stirred and mixed at 130 ° C. for 1 hour to dissolve the phthalic anhydride.

After cooling the homogeneous solution thus obtained to room temperature, 200 ml of titanium tetrachloride kept at -20 ° C.
75 ml of this homogeneous solution were added dropwise therein over 1 hour. After the completion of charging, the temperature of this mixed solution was raised to 110 ° C. over 4 hours, and when it reached 110 ° C., 5.22 g of diisobutyl phthalate (DIBP) was added, and the mixture was stirred at the same temperature for 2 hours. Held

After the completion of the reaction for 2 hours, a solid portion was collected by hot filtration. The solid portion was resuspended in 275 ml of titanium tetrachloride and then heated again at 110 ° C. for 2 hours. After completion of the reaction, the solid part was collected again by hot filtration and washed sufficiently with decane and hexane at 110 ° C. until no free titanium compound was detected in the solution.

The solid titanium catalyst component (A) prepared as described above was stored as a decane slurry, and a part of this was dried for the purpose of examining the catalyst composition. The composition of the solid titanium catalyst component (A) thus obtained is
2.3% by weight titanium, 61% by weight chlorine, 1 magnesium
It was 9% by weight and 12.5% by weight of DIBP.

[Preliminary Polymerization] In a 400 ml four-necked glass reactor equipped with a stirrer, 100 parts of purified hexane was added under nitrogen atmosphere.
ml, triethylaluminum 10 mmol, 2-isopentyl-2-isopropyl-1,3-dimethoxypropane (IP
2 mmol of AMP) and 1 mmol of the solid titanium catalyst component (A) obtained as described above in terms of titanium atom are added, and then propylene is fed to this reactor for 1 hour at a rate of 3.2 N liter / hour. did. Polymerization temperature is 20 ℃
Kept at.

When the supply of propylene was completed, the inside of the reactor was replaced with nitrogen, and the washing operation consisting of removal of the supernatant and addition of purified hexane was carried out twice, and then resuspended in purified hexane to prepare a catalyst bottle. The whole amount was transferred to obtain a prepolymerized catalyst (a).

Preparation of Olefin Polymerization Catalyst (2) [ Preparation of Solid Metallocene Catalyst] 10.0 kg of silica dried at 250 ° C. for 10 hours was suspended in 154 liters of toluene and then cooled to 0 ° C. Then, 57.5 liters of a toluene solution of methylaluminoxane (Al = 1.33 mol / liter) was added dropwise over 1 hour. At this time, the temperature in the system was kept at 0 ° C. Continue to react at 0 ° C for 30 minutes, then raise to 95 ° C over 1.5 hours,
The reaction was carried out at that temperature for 20 hours. Then, the temperature was lowered to 60 ° C., and the supernatant was removed by the decantation method.

The solid component thus obtained was washed twice with toluene and then resuspended in 100 liters of toluene. To this system, 16.8 liters of a toluene solution of bis (1-methyl-3-n-butylcyclopentadienyl) zirconium dichloride (Zr = 27.0 mmol / liter) was added dropwise at 80 ° C. over 30 minutes. Then, the mixture was further reacted at 80 ° C. for 2 hours. Then, the supernatant was removed and the solid was washed twice with hexane to obtain a solid catalyst containing 3.5 mg of zirconium per 1 g.

[Prepolymerization] 870 g of the solid catalyst obtained above and 1-hexene 260 were added to 87 liters of hexane containing 2.5 mol of triisobutylaluminum.
g was added and ethylene was prepolymerized at 35 ° C. for 5 hours to obtain a metallocene prepolymerized catalyst (b) in which 10 g of polyethylene was prepolymerized per 1 g of the solid catalyst.

[0209]

Example 1 [Polymerization] An autoclave having an internal volume of 17 liters was charged with 3 kg of propylene and 45 liters of hydrogen, heated to 60 ° C., 15 mmol of triethylaluminum, 15 mmol of dicyclopentyldimethoxysilane (DCPMS) and The prepolymerized catalyst (a) obtained above was charged in an amount of 0.05 mmol in terms of titanium atom. After the temperature was raised to 70 ° C., this was kept for 40 minutes to carry out homopolymerization of propylene.

After completion of the homopolymerization of propylene, the vent valve was opened and the pressure inside the polymerization vessel was released until it became normal pressure. After completion of depressurization, copolymerization of ethylene and propylene was subsequently carried out. That is, 240 N liter / hour of ethylene, 960 N liter / hour of propylene, and 10 N of hydrogen.
The amount of N liter / hour was fed to the polymerization vessel. The vent opening of the polymerization vessel was adjusted so that the pressure in the polymerization vessel was 10 kg / cm ² G. The temperature was kept at 70 ° C. and polymerization was carried out for 50 minutes.

After completion of the copolymerization of ethylene and propylene,
The vent valve was opened, and unreacted ethylene and propylene were depressurized until the pressure inside the polymerization vessel became normal pressure, and the pressure was further reduced. After completion of the reduced pressure, ethylene and 1-butene were subsequently copolymerized. That is, the pressure was returned to normal pressure by introducing a mixed gas of ethylene and 1-butene (1-butene content 12.3 mol%), and the temperature inside the system was set to 55 ° C.

Then, 0.04 mmol of the metallocene prepolymerization catalyst (b) obtained above in terms of zirconium atom and 4 mmol of triisobutylaluminum were added to the autoclave.

Thereafter, 400 ml of hydrogen and a mixed gas of ethylene and 1-butene were introduced, and the total pressure was 8 kg / cm ² G
Then, polymerization was carried out at 60 ° C. for 40 minutes. The unreacted gas in the polymerization vessel was purged, and the produced white powder was reduced in pressure to 80
A polymer (olefin polymer) was obtained by drying at ° C. The yield was 2426 g.

The polymer thus obtained had an MFR of 32 g / 10 minutes and a bulk specific gravity of 0.43 g / ml. To 100 parts by weight of the olefin polymer obtained as described above, 0.05 parts by weight of tetrakis (methylene (3,5-di-t-butyl-4-hydroxy) hydrocinnamate) methane, tris (mixed) Mono & dinonyl phenyl phosphite) 0.05 parts by weight and calcium stearate 0.1
An olefin polymer granule was obtained by adding and mixing parts by weight and kneading and granulating at 250 ° C. using an extrusion granulator having a screw diameter of 20 mm (made by Thermoplastics Co., Ltd.).

From the obtained granules, each AS as described below was used at a molding temperature of 200 ° C. using an injection molding machine (manufactured by Toshiba Kikai).
Bending elastic modulus (FM), Izod impact strength (IZ) created on the TM standard test piece according to the ASTM standard measurement method.
Was measured.

Flexural Modulus (FM): ASTM-D790
It measured according to. Test piece 12.7 cm × 12.7 mm × 3.0 mm Izod impact strength (IZ): Measured according to ASTM-D256.

Test piece 12.7 cm × 12.7 mm × 6.0 mm (rear notch) The results are shown in Table 1.

[0218]

Example 2 An olefin polymer was obtained in the same manner as in Example 1 except that "polymerization" was carried out as follows.

The results are shown in Table 1. [Polymerization] An autoclave having an internal volume of 17 liters was charged with 3 kg of propylene and 45 liters of hydrogen and heated to 60 ° C., then 15 mmol of triethylaluminum, 15 mmol of dicyclopentyldimethoxysilane (DCPMS) and obtained in Example 1 were obtained. The resulting prepolymerized catalyst (a) was charged in an amount of 0.05 mmol in terms of titanium atom. After the temperature was raised to 70 ° C., this was kept for 40 minutes to carry out homopolymerization of propylene.

After completion of the homopolymerization of propylene, the vent valve was opened and the pressure inside the polymerization vessel was released until it became normal pressure. After completion of depressurization, copolymerization of ethylene and propylene was subsequently carried out. That is, 240 N liter / hour of ethylene and 960 N liter / hour of propylene were supplied to the polymerization vessel. The vent opening of the polymerization vessel was adjusted so that the pressure in the polymerization vessel was 10 kg / cm ² G. The temperature was kept at 70 ° C. and polymerization was carried out for 80 minutes.

After completion of the copolymerization of ethylene and propylene,
The vent valve was opened, and unreacted ethylene and propylene were depressurized until the pressure inside the polymerization vessel became normal pressure, and the pressure was further reduced. After completion of the reduced pressure, ethylene and 1-butene were subsequently copolymerized. That is, the pressure was returned to normal pressure by introducing a mixed gas of ethylene and 1-butene (1-butene content 12.3 mol%), and the temperature inside the system was set to 55 ° C.

Next, 0.04 mmol of the metallocene prepolymerization catalyst (b) in terms of zirconium atom and 4 mmol of triisobutylaluminum were added to the autoclave.

Then, 400 ml of hydrogen and a mixed gas of ethylene and 1-butene were introduced, and the total pressure was 8 kg / cm ² G.
Then, polymerization was carried out at 60 ° C. for 40 minutes. The unreacted gas in the polymerization vessel was purged, and the produced white powder was reduced in pressure to 80
A polymer was obtained by drying at ℃.

The results are shown in Table 1.

[0225]

Comparative Example 1 In the "polymerization" of Example 1, ethylene was used.
When copolymerizing with 1-butene, without adding metallocene prepolymerization catalyst (b) and triisobutylaluminum,
An olefin polymer was obtained in the same manner as in Example 1 except that the amount of hydrogen introduced was 800 ml and the polymerization was carried out at 60 ° C. for 90 minutes.

The results are shown in Table 1.

[0227]

Comparative Example 1 In the "polymerization" of Example 2, ethylene was used.
When copolymerizing with 1-butene, without adding metallocene prepolymerization catalyst (b) and triisobutylaluminum,
An olefin polymer was obtained in the same manner as in Example 2 except that the amount of hydrogen introduced was 800 ml and the polymerization was carried out at 60 ° C. for 90 minutes.

The results are shown in Table 1.

[0229]

[Table 1]

Claims (1)

[Claims] 1. A solid titanium catalyst component containing [I] (A) magnesium, titanium, a halogen and an electron donor, (B) an organometallic compound, and optionally (C).
A step of producing a crystalline polypropylene component by homopolymerizing [I-1] propylene or by copolymerizing propylene and another α-olefin in the presence of an olefin polymerization catalyst (1) comprising an electron donor. And a step of copolymerizing [I-2] ethylene with an α-olefin having 3 to 20 carbon atoms to produce a low crystalline or non-crystalline ethylene / α-olefin copolymer component in any order. To form a propylene-based block copolymer component, and then [II] (D) a transition metal compound containing a ligand having a cyclopentadienyl skeleton, and (E) (E-1) organoaluminum oxy A compound and / or (E-2) an olefin polymerization catalyst (2) consisting of a Lewis acid or an ionic compound is added to a polymerization system to copolymerize ethylene with an α-olefin having 3 to 20 carbon atoms. Low crystallinity or Process for producing an olefin polymer, which comprises forming a crystalline ethylene · alpha-olefin copolymer component.