JP2001329013A - Solid catalyst component for olefin polymerization and catalyst - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid catalyst component for olefin polymerization, and a catalyst which can produce an olefinic polymer in an extremely high yield and in particular a propylene polymer with maintaining a high stereoregularity. SOLUTION: There are provided a solid catalyst component for olefin polymerization and a catalyst, which comprise (a) a magnesium compound, (b) titanium tetrachloride, (c) a phthalic acid diester, and (d) a cyclic alcohol represented by formula: (R1)mX(OH)n wherein R1 is a 1-5C alkyl group or a halogen atom; the number m of the substituting group R1 is 0, 1 or 2; the number n of the hydroxyl group is 2 or 3; and X is a group formed by removing (m+n) atoms of hydrogen from cyclopentane or cyclohexane}.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid catalyst component for olefin polymerization and a catalyst capable of obtaining an olefin polymer at an extremely high yield while maintaining a high stereoregularity.

[0002]

2. Description of the Related Art Heretofore, in the polymerization of olefins, solid catalyst components containing magnesium, titanium, an electron donating compound and halogen as essential components have been known.
Further, many olefin polymerization methods for polymerizing or copolymerizing olefins in the presence of an olefin polymerization catalyst comprising the solid catalyst component, an organic aluminum compound and an organic silicon compound have been proposed. For example, JP
2-98045 discloses a magnesium halide,
A method of polymerizing an olefin having 3 or more carbon atoms using a catalyst comprising a combination of a solid catalyst component containing an electron donor of a diester compound such as a titanium halide and an organic carboxylic acid ester and an organic aluminum compound is disclosed. Have been.

JP-A-53-19395 discloses an acyl halide, a magnesium dihalide, a halogen-containing titanium compound and an alcohol compound and / or
Alternatively, a solid catalyst component for olefin polymerization containing a phenolic compound is disclosed, and by polymerizing propylene in the presence of the solid catalyst component, a polymer having both excellent mechanical properties and moldability can be obtained at a high yield. The rate is obtained at a certain rate, and the effect is somewhat improved.

However, in order to reduce the cost of olefin polymers in recent years, to improve processes, and to efficiently produce polymers having high functions such as copolymers, there is a strong demand for further activation of catalysts. Therefore, it is not always sufficient to satisfy this demand, and further improvement has been desired.

[0005]

That is, an object of the present invention is to obtain an olefin polymer in an extremely high yield and obtain a propylene polymer in an extremely high yield while maintaining a high stereoregularity. It is an object of the present invention to provide a solid catalyst component and a catalyst for olefin polymerization which can be used.

[0006]

Under these circumstances, the present inventors have conducted intensive studies to solve the problems left in the above prior art, and as a result, have found that magnesium compounds, titanium tetrachloride, phthalate esters and specific The solid catalyst component composed of a cyclic alcohol exhibits extremely high activity when subjected to the polymerization of olefins, and particularly has extremely high activity or yield while maintaining high stereoregularity when subjected to the polymerization of propylene. This led to the completion of the present invention.

That is, the present invention relates to (a) magnesium
Compound, (b) Titanium tetrachloride, (c) Diester phthalate
And (d) the following general formula (1);¹)_mX (OH)_n (1) ｛where R¹Is an alkyl group having 1 to 5 carbon atoms or halogen
And a substituent R ¹The number m is 0, 1 or 2
And the number n of hydroxyl groups is 2 or 3, and X is cyclopentene.
Hydrogen (m + n) atoms from tan or cyclohexane
Indicates a removed group. Formed from a cyclic alcohol represented by｝
A solid catalyst for olefins polymerization characterized by being formed
Provide ingredients.

Further, the present invention provides (A) the solid catalyst component for olefin polymerization, (B) the following general formula (2): R ² _p AlQ _3-p (2) (wherein R ² is carbon An alkyl group represented by the formulas (1) to (4), Q represents a hydrogen atom or a halogen atom, and p is an integer satisfying 0 <p ≦ 3), and (C) the following general formula (3) R ³ _q Si (OR ⁴ ) _4-q (3) (wherein, R ³ represents an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group, a phenyl group, a vinyl group, an allyl group, or an aralkyl group) May be the same or different, and R ⁴ represents an alkyl group having 1 to ⁴ carbon atoms, a cycloalkyl group, a phenyl group, a vinyl group, an allyl group, or an aralkyl group, and may be the same or different; And an integer of 0 ≦ q ≦ 3). The present invention provides a catalyst for polymerization of olefins.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A magnesium compound used for preparing the solid catalyst component (A) for olefin polymerization of the present invention (hereinafter simply referred to as "solid catalyst component (A) for olefin polymerization")
There is that. ) Includes magnesium dihalide, dialkyl magnesium, alkyl magnesium halide, dialkoxy magnesium, diaryloxy magnesium, alkoxy magnesium halide, and fatty acid magnesium.

Specific examples of magnesium dihalide include magnesium dichloride, magnesium dibromide, magnesium diiodide, magnesium difluoride and the like.

The dialkylmagnesium has the general formula
R ⁵ R ⁶ Mg (wherein, R ⁵ and R ⁶ represents an alkyl group having 1 to 10 carbon atoms, each of which may be the same or different.) Is preferably a compound represented by, more specifically, Dimethyl magnesium, diethyl magnesium, methyl ethyl magnesium, dipropyl magnesium, methyl propyl magnesium, ethyl propyl magnesium, dibutyl magnesium, methyl butyl magnesium, ethyl butyl magnesium, and the like. These dialkylmagnesiums can be obtained by reacting metal magnesium with a halogenated hydrocarbon or alcohol.

As the alkyl magnesium halide, a compound represented by the general formula R ⁷ MgD ¹ (wherein, R ⁷ represents an alkyl group having 1 to 10 carbon atoms and D ¹ represents a halogen atom) is preferable. More specifically, examples thereof include ethyl magnesium chloride, propyl magnesium chloride, and butyl magnesium chloride. These magnesium halides can be obtained by reacting metal magnesium with a halogenated hydrocarbon or alcohol.

The dialkoxymagnesium or diaryloxymagnesium may be represented by the general formula Mg (OR ⁸ ) (OR ⁹ )
(Wherein, R ⁸ and R ⁹ each represent an alkyl group or an aryl group having 1 to 10 carbon atoms, which may be the same or different), and more specifically, dimethoxy. Magnesium, diethoxymagnesium, dipropoxymagnesium, dibutoxymagnesium, diphenoxymagnesium, ethoxymethoxymagnesium, ethoxypropoxymagnesium, butoxyethoxymagnesium and the like. These dialkoxymagnesium or diaryloxymagnesium can be obtained by reacting metal magnesium with an alcohol in the presence of a halogen or a halogen-containing metal compound.

As the alkoxymagnesium halide, a compound represented by the general formula Mg (OR ¹⁰ ) D ² (where R ¹⁰ represents an alkyl group having 1 to ¹⁰ carbon atoms and D ² represents a halogen atom). Preferred and more specific examples include magnesium methoxychloride, ethoxymagnesium chloride, magnesium propoxychloride, and magnesium butoxychloride.

As the fatty acid magnesium, the general formula Mg (R
¹¹ COO) ₂ (wherein, R ¹¹ represents a hydrocarbon group having 1 to 20 carbon atoms), and more specifically, magnesium laurate, magnesium stearate, magnesium octoate and And magnesium decanoate.

Of these magnesium compounds in the present invention, dialkoxymagnesium is preferred, and among them, diethoxymagnesium and dipropoxymagnesium are particularly preferred. The above magnesium compounds can be used alone or in combination of two or more.

In the present invention, when dialkoxymagnesium is used as the solid catalyst component (A) for olefin polymerization, the dialkoxymagnesium may be in the form of granules or powder, and the shape may be irregular or spherical. For example, when a spherical dialkoxymagnesium is used, a polymer powder having a better particle shape and a narrow particle size distribution is obtained, and the handling operability of the produced polymer powder during the polymerization operation is improved, and the produced polymer powder is used. Problems such as clogging caused by the contained fine powder are eliminated.

The above-mentioned spherical dialkoxymagnesium is
It is not always necessary to have a true spherical shape, and an elliptical or potato-shaped one is used. Specifically, the shape of the particles is such that the ratio (l / w) of the major axis diameter l to the minor axis diameter w is usually 3 or less, preferably 1 to 2, and more preferably 1 to 2.
From 1.5. Methods for producing such spherical dialkoxymagnesium are described, for example, in JP-A-58-41832, JP-A-62-51633, and JP-A-3-7434.
No. 1, No. 4-368391, No. 8-73338
No. 8, for example.

The average particle size of the dialkoxymagnesium is usually 1 to 200 μm, preferably 5 to 1 μm.
50 μm. In the case of a spherical dialkoxymagnesium, the average particle size is usually 1 to 100 μm, preferably 5 to 50 μm, more preferably 10 to 40 μm.
m. Further, as for the particle size, it is desirable to use a fine particle and coarse powder having a small particle size distribution. Specifically, the particle size of 5 μm or less is 20% or less, preferably 10% or less. On the other hand, particles having a size of 100 μm or more are 10% or less, preferably 5% or less. Further, when the particle size distribution is expressed by ln (D90 / D10) (where D90 is the particle size at 90% in integrated particle size, and D10 is the particle size at 10% in integrated particle size), it is 3 or less, and preferably 3 or less. 2 or less.

In the present invention, titanium tetrachloride (hereinafter sometimes simply referred to as "component (b)") is used for preparing the solid catalyst component (A) for olefin polymerization, but titanium halide other than titanium tetrachloride is used. Compounds can also be used in combination therewith. As this titanium halide compound, a general formula Ti (OR ¹² ) _n Cl _4-n (wherein R ¹² represents an alkyl group having 1 to 4 carbon atoms, and n is an integer of 1 ≦ n ≦ 3. ) Is exemplified. The above-mentioned titanium halide compound may be used alone or
More than one species may be used in combination. Specifically, Ti (OCH ₃ ) Cl
_{3, Ti (OC 2 H 5} ) Cl 3, Ti (OC 3 H 7) Cl 3, Ti (OnC 4 H 9) Cl 3,
Ti (OCH ₃ ) ₂ Cl ₂ , Ti (OC ₂ H ₅ ) ₂ Cl ₂ , Ti (OC ₃ H ₇ ) ₂ Cl ₂ , Ti (O
_{-nC 4 H 9) 2 Cl 2} , Ti (OCH 3) 3 Cl, Ti (OC 2 H 5) 3 Cl, Ti (OC
₃ H ₇ ) ₃ Cl, Ti (OnC ₄ H ₉ ) ₃ Cl and the like are exemplified.

A specific example of the phthalic acid diester (hereinafter may be simply referred to as “component (c)”) used for preparing the solid catalyst component (A) for olefin polymerization in the present invention is dimethyl phthalate. , Diethyl phthalate, di-n-propyl phthalate, di-iso-phthalate
Propyl, di-n-butyl phthalate, di-is-phthalate
o-butyl, ethyl methyl phthalate, methyl phthalate (iso-propyl), ethyl phthalate (n-propyl), ethyl phthalate (n-butyl), ethyl phthalate (iso-butyl), di-n phthalate -Pentyl, di-iso-pentyl phthalate, dihexyl phthalate, di-n-heptyl phthalate, di-n-octyl phthalate, bis (2,2-dimethylhexyl) phthalate, bis (2-ethylhexyl) phthalate ), Di-n-nonyl phthalate,
Di-iso-decyl phthalate, bis (2,2-
Dimethylheptyl), n-butyl phthalate (iso-hexyl), n-butyl phthalate (2-ethylhexyl), n-pentylhexyl phthalate, n-pentyl phthalate (iso-hexyl), iso-pentyl phthalate ( Heptyl), n-pentyl phthalate (2-ethylhexyl), n-pentyl phthalate (iso-nonyl),
Iso-pentyl phthalate (n-decyl), n-phthalic acid
-Pentylundecyl, iso-pentyl phthalate (i
(so-hexyl), n-hexyl phthalate (2-ethylhexyl), n-hexyl phthalate (2-ethylhexyl), n-hexyl phthalate (iso-nonyl), n-hexyl phthalate (n-decyl), phthalate N-heptyl acid (2-ethylhexyl), n-heptyl phthalate (i
so-nonyl), n-heptyl phthalate (neo-decyl), 2-ethylhexyl phthalate (iso-nonyl)
And one or more of these are used.

Of the above, diethyl phthalate, di-n-propyl phthalate, di-iso-propyl phthalate, di-n-butyl phthalate, di-iso-butyl phthalate, di-n-phthalate are particularly preferred. Octyl, bisphthalic acid (2-
Ethylhexyl) and di-iso-decyl phthalate are preferably used.

The cyclic alcohol (hereinafter sometimes simply referred to as “component (d)”) used for preparing the solid catalyst component (A) for olefin polymerization in the present invention is represented by the following formula: (R ¹ ) in _m X (OH) _n {wherein, R ¹ represents an alkyl group or a halogen atom having 1 to 5 carbon atoms, R ¹
Is 0, 1 or 2, the number n of hydroxyl groups is 2 or 3, and X is a group obtained by removing a hydrogen (m + n) atom from cyclopentane or cyclohexane. And these cyclic alcohols can be used alone or in combination of two or more. The cyclic alcohol of the present invention is a cyclic polyhydric alcohol as described above. In particular, in the above general formula, a dihydric alcohol in which the number n of hydroxyl groups is 2 is preferably used, and the number m of the substituent R ¹ is 0. Or 1 is preferable, and a preferable group of R ¹ is
Examples include a methyl group, an ethyl group, a chlorine atom, a fluorine atom and a bromine atom. When the number n of the hydroxyl groups is 2, the 1- and 2-positions are preferable, and when n is 3, the hydroxyl groups are substituted at the 1-, 2-, and 3-positions or the 1-position,
Positions 2 and 4 are preferred.

Specific examples of the cyclic alcohol of the present invention include cis-1,2-cyclopentanediol, trans-
1,2-cyclopentanediol, cis-1,2-cyclohexanediol, trans-1,2-cyclohexanediol, 4-methyl-cis-1,2-cyclohexanediol, 4-methyl-trans-1,2-cyclohexane Diol, 3-bromo-1,2-cis-cyclohexanediol, 3-bromo-1,2-trans-cyclohexanediol, 1,2,3-cyclohexanetriol, 1,
2,4-cyclohexanetriol and the like.

Among these, preferred cyclic alcohols are
cis-1,2-cyclopentanediol, trans-1,
2-cyclopentanediol, cis-1,2-cyclohexanediol, trans-1,2-cyclohexanediol, 1,2,3-cyclohexanetriol,
These cyclic alcohols can be used alone or in combination of two or more. Particularly preferred cyclic alcohols are cis-1,2-cyclohexanediol, trans-
1,2-cyclohexanediol, which may be used alone or in combination of two or more.

In the preparation of the solid catalyst component (A) for olefin polymerization in the present invention, in addition to the above essential components,
Further, aluminum trichloride, diethoxyaluminum chloride, di-iso-propoxyaluminum chloride, ethoxyaluminum dichloride, i
Aluminum compounds such as so-propoxyaluminum dichloride, butoxyaluminum dichloride, and triethoxyaluminum, or metal salts of organic acids such as sodium stearate, magnesium stearate, and aluminum stearate, or liquid or viscous linear or partial hydrogen at room temperature Polysiloxanes such as modified, cyclic or modified polysiloxanes can be used. As the chain polysiloxane, dimethyl polysiloxane and methylphenyl polysiloxane are used. As the partially hydrogenated polysiloxane, methyl hydrogen polysiloxane having a hydrogenation ratio of 10 to 80% is used. As the cyclic polysiloxane,
Hexamethylcyclopentanesiloxane, 2,4,6-
Examples include trimethylcyclotrisiloxane and 2,4,6,8-tetramethylcyclotetrasiloxane, and examples of the modified polysiloxane include higher fatty acid group-substituted dimethylsiloxane, epoxy group-substituted dimethylsiloxane, and polyoxyalkylene group-substituted dimethylsiloxane. Is done.

The solid catalyst component (A) for olefin polymerization can be prepared by bringing the above-mentioned components (a), (b), (c) and (d) into contact with each other. Although the contact can be performed in the absence of an inert organic solvent, it is preferable to perform the treatment in the presence of the solvent in consideration of easiness of operation. Examples of the inert organic solvent used include saturated hydrocarbon compounds such as hexane, heptane, and cyclohexane; aromatic hydrocarbon compounds such as benzene, toluene, xylene, and ethylbenzene; ortho-dichlorobenzene, methylene chloride, carbon tetrachloride, and dichloroethane. And the like, of which the boiling point is 90 to 1
Aromatic hydrocarbon compounds that are liquid at room temperature at about 50 ° C., specifically, toluene, xylene, and ethylbenzene are preferably used.

As a method for preparing the solid catalyst component (A) for olefin polymerization according to the present invention, the magnesium compound of the component (a) is dissolved in an alcohol or a titanium compound, and the solution is mixed with the component (A). b) or after contacting the component (b) and the component (c) to precipitate a solid by heat treatment or the like, and further contacting the component (b);
A method of obtaining a solid component by bringing the component (d) into contact at any one of these stages. Further, the component (a) is suspended in the component (b) or an inert hydrocarbon solvent, and the component (c) or the component (c) is brought into contact with the component (b), and then the component (b) is brought into contact with the suspension. And a method of contacting the component (d) at any one of the stages to obtain the solid catalyst component (A) for olefin polymerization.

Among them, the particles of the solid catalyst component obtained by the former method are almost spherical, and the particle size distribution is sharp. Also, in the latter method, a spherical and sharp particle size distribution solid catalyst component can be obtained by using a spherical magnesium compound, and even without using a spherical magnesium compound, for example, by using a spray device. By spraying and drying the solution or suspension to form particles by a so-called spray drying method, a solid catalyst component which is similarly spherical and has a sharp particle size distribution can be obtained.

The contact of each component is carried out in a container equipped with a stirrer under an atmosphere of an inert gas under a condition of removing water and the like.
This is performed while stirring. The contact temperature may be a relatively low temperature range around room temperature when the mixture is simply brought into contact and stirred or mixed or dispersed or suspended for denaturation treatment. If you get
A temperature range of 40 to 130C is preferred. When the temperature during the reaction is lower than (40) ° C., the reaction does not proceed sufficiently, and as a result, the performance of the prepared solid catalyst component becomes insufficient, and
If the temperature exceeds 30 ° C., the control of the reaction becomes difficult, for example, the evaporation of the used solvent becomes remarkable. The reaction time is at least 1 minute, preferably at least 10 minutes, more preferably at least 30 minutes.

In the present invention, when the solid catalyst component (A) for olefin polymerization is prepared, the order of contact of the components (a) to (d) is arbitrary. ), And then contacting with the component (a) and / or the component (c) are preferable for improving the activity of the solid catalyst component. Here, when the component (d) is brought into contact with the component (b) in advance, a complex compound of the cyclic alcohol (d) and the titanium tetrachloride (b) is formed, and then the component (a) is formed.
Contact with component (c) is also one of the preferred embodiments.

The method for preparing the solid catalyst component (A) for olefin polymerization is described below. (1) After dissolving magnesium chloride (a) in tetraalkoxytitanium, contact a polysiloxane to obtain a solid product. The solid product is mixed with titanium tetrachloride (b) and titanium tetrachloride (b) in advance. A method in which the contacted component (d) is reacted, and then the component (c) is contact-reacted to prepare a solid catalyst component (A) for olefin polymerization. In this case, the solid catalyst component (A) for olefin polymerization may be preliminarily polymerized with an organoaluminum compound, an organosilicon compound and an olefin.

(2) Anhydrous magnesium chloride (a) and 2
After reacting ethylhexyl alcohol to form a homogeneous solution, phthalic anhydride is brought into contact with the homogeneous solution, and then titanium tetrachloride (b) and the component (c) are brought into contact with the solution to obtain a solid product. A method of preparing a solid catalyst component (A) for olefin polymerization by contacting the solid product with titanium tetrachloride (b) and the component (d) previously contacted with titanium tetrachloride (b).

(3) An organomagnesium compound (a) is synthesized by reacting metallic magnesium, butyl chloride and dibutyl ether, and the organomagnesium compound is contacted with tetrabutoxytitanium and tetraethoxytitanium to produce a solid product. To the solid product, component (c), dibutyl ether, titanium tetrachloride (b)
And a method of preparing a solid catalyst component (A) for olefin polymerization by subjecting the component (d) previously contacted to titanium tetrachloride (b) to a contact reaction. In this case, the solid component can be preliminarily polymerized with an organoaluminum compound, an organosilicon compound and an olefin to prepare the olefin polymerization solid catalyst component (A).

(4) An organomagnesium compound (a) such as dibutylmagnesium and an organoaluminum compound are
In the presence of a hydrocarbon solvent, for example, a contact reaction with an alcohol such as butanol or 2-ethylhexyl alcohol is carried out to form a homogeneous solution, and this solution is contacted with a silicon compound such as SiCl ₄ , HSiCl ₃ or polysiloxane to produce a solid product. And then reacting the solid product with titanium tetrachloride (b), component (c) and component (d) previously contacted with titanium tetrachloride (b) in the presence of an aromatic hydrocarbon solvent. And then contacting titanium tetrachloride (b) to obtain a solid catalyst component (A) for olefin polymerization.

(5) Magnesium chloride (a), tetraalkoxytitanium and aliphatic alcohol are contact-reacted in the presence of an aliphatic hydrocarbon compound to form a homogeneous solution, and titanium tetrachloride (b) is added to the solution. Thereafter, the temperature is raised to precipitate a solid product, and the component (c) is brought into contact with the solid product,
A method of obtaining a solid catalyst component (A) for olefin polymerization by reacting titanium tetrachloride (b) and a component (d) previously contacted with titanium tetrachloride (b).

(6) Metal magnesium powder, alkyl monohalogen compound and iodine are contact-reacted, and then tetraalkoxytitanium, acid halide and aliphatic alcohol are contact-reacted in the presence of aliphatic hydrocarbon to obtain a homogeneous solution. (A), titanium tetrachloride (b) was added to the solution, and the temperature was raised to precipitate a solid product. The component (c) was brought into contact with the solid product, and titanium tetrachloride (b) and Component (d) previously contacted with titanium tetrachloride (b)
To prepare a solid catalyst component (A) for olefin polymerization.

(7) Diethoxymagnesium (a) is suspended in an alkylbenzene or halogenated hydrocarbon solvent, then brought into contact with titanium tetrachloride (b), and then heated to contact with component (c). After washing the solid product with alkylbenzene, the solid product is contacted again with titanium tetrachloride (b) and the component (d) previously contacted with titanium tetrachloride (b) in the presence of alkylbenzene. A method for preparing a solid catalyst component (A) for olefin polymerization. At this time, the solid component can be subjected to a heat treatment in the presence or absence of a hydrocarbon solvent to obtain a solid catalyst component (A) for olefin polymerization.

(8) After suspending diethoxymagnesium (a) in alkylbenzene, titanium tetrachloride (b)
And a contact reaction with the component (c) to obtain a solid product. The solid product is washed with alkylbenzene, and then contacted again with titanium tetrachloride (b) and titanium tetrachloride (b) in the presence of alkylbenzene. A method for obtaining a solid catalyst component (A) for olefin polymerization by contacting the solid component (d) with the component (d). At this time, the solid component and titanium tetrachloride (b) and the component (d) previously contacted with titanium tetrachloride (b)
May be contacted twice or more to obtain a solid catalyst component (A) for olefin polymerization.

(9) Diethoxymagnesium (a), calcium chloride and a silicon compound represented by Si (OR ¹³ ) ₄ (where R ¹³ represents an alkyl group or an aryl group) are co-ground to obtain After suspending the pulverized solid obtained in the aromatic hydrocarbon, it is contacted with titanium tetrachloride (b) and component (c), and then further reacted with titanium tetrachloride (b) and titanium tetrachloride (b). A method for preparing a solid catalyst component (A) for olefin polymerization by contacting the contacted component (d).

(10) Diethoxymagnesium (a) and component (c) are suspended in alkylbenzene, and the suspension is added to titanium tetrachloride (b) and reacted to obtain a solid product. The solid product is washed with alkylbenzene, and then in the presence of alkylbenzene, titanium tetrachloride (b) and the component (d) previously brought into contact with titanium tetrachloride (b) are brought into contact with each other to obtain a solid catalyst component for olefin polymerization. A method for obtaining (A).

(11) Aliphatic magnesium such as calcium halide and magnesium stearate (a)
Is reacted with titanium tetrachloride (b) and component (c), and then contacted with titanium tetrachloride (b) and component (d) previously contacted with titanium tetrachloride (b) to polymerize olefins. A method for preparing a solid catalyst component (A) for use.

(12) Diethoxymagnesium (a) is suspended in an alkylbenzene or halogenated hydrocarbon solvent, then brought into contact with titanium tetrachloride (b), and then heated to contact reaction with component (c). To obtain a solid product. The solid product is washed with alkylbenzene, and then brought into contact with titanium tetrachloride (b) and the component (d) previously contacted with titanium tetrachloride (b) in the presence of alkylbenzene. A solid catalyst component (A) for olefin polymerization by contacting aluminum chloride at any stage of the above suspension, contact and contact reaction. How to prepare.

(13) Diethoxymagnesium (a),
2-ethylhexyl alcohol and carbon dioxide are contact-reacted in the presence of toluene to form a homogeneous solution, and titanium tetrachloride (b) and component (c) are contact-reacted with the solution to obtain a solid product. The product is dissolved in tetrahydrofuran, and then a solid product is further precipitated. The solid product is contact-reacted with titanium tetrachloride (b) and the component (d) previously contacted with titanium tetrachloride (b). The contact reaction between the titanium tetrachloride (b) and the component (d) previously contacted with the titanium tetrachloride (b) is repeated to obtain a solid catalyst component (A) for olefin polymerization.
How to prepare. In this case, a silicon compound such as tetrabutoxysilane can be used in any of the contact, contact reaction, and dissolution steps.

(14) Magnesium chloride (a), an organic epoxy compound and a phosphoric acid compound are suspended in a hydrocarbon solvent such as toluene, and then heated to form a homogeneous solution. Titanium chloride (b) is contact-reacted to obtain a solid product, and the solid product is contacted with component (c) to cause a reaction. The obtained reaction product is washed with alkylbenzene, and then, in the presence of alkylbenzene, Again titanium tetrachloride (b) and titanium tetrachloride (b) in advance
A method for obtaining a solid catalyst component (A) for olefins polymerization by contacting the component (d) which has been brought into contact with olefin.

(15) The dialkoxymagnesium (a), the titanium compound and the component (c) are contact-reacted in the presence of toluene, and the resulting reaction product is contact-reacted with a silicon compound such as polysiloxane. Contacting titanium chloride (b) with a metal salt of an organic acid, and then contacting titanium tetrachloride (b) again with component (d) previously contacted with titanium tetrachloride (b). To obtain a solid catalyst component (A) for the polymerization of olefins.

The preferred method for preparing the solid catalyst component (A) for olefin polymerization used in the present invention is as follows:
For example, a suspension may be formed by suspending a dialkoxymagnesium as a component (a) in a liquid aromatic hydrocarbon compound at room temperature, and then adding the component (a) to the suspension. As b), titanium tetrachloride is contacted at -20 to 100C, preferably -10 to 70C, more preferably 0 to 30C, and reacted at 40 to 130C, more preferably 70 to 120C. At this time, before or after the titanium halide is brought into contact with the above suspension, di-n-butyl phthalate is used as the component (c),
Contact at −20 to 130 ° C. to obtain a solid reaction product.
After washing the solid reaction product with a liquid aromatic hydrocarbon compound at room temperature, the component (d) is brought into contact again with a tetravalent titanium halide and a tetravalent titanium halide in advance.
A cyclic alcohol such as trans-1,2-cyclopentanediol in the presence of an aromatic hydrocarbon compound such as toluene at 40 to 130 ° C., more preferably 70 to 130 ° C.
The reaction is carried out at 120 ° C., and the mixture is washed with a hydrocarbon compound which is liquid at room temperature to obtain a solid catalyst component (A) for olefin polymerization.

The amount ratio of each compound varies depending on the preparation method and cannot be specified unconditionally. For example, 0.5 to 100 mol, preferably 0.5 to 100 mol of component (b) per mol of component (a). 50 mol, more preferably 1 to 10 mol, and component (c) is 0.01 to 10 mol, preferably 0.1 to 10 mol.
0.1 to 1 mol, more preferably 0.02 to 0.6 mol, and the component (d) is 0.0005 to 1 mol, preferably 0.0005 to 0.5 mol, more preferably 0.001 mol.
０．１0.1 mol. When the component (d) is used in contact with the component (b) in advance, the amount of the component (b) used is 0.0002 to 0.05 with respect to 1 mol of the component (b).
Mole, preferably 0.0001 to 0.01 mole.

The olefin polymerization solid catalyst component (A) prepared as described above contains magnesium, titanium, component (c), component (d) and a halogen atom. The content of each component is not particularly limited, but preferably 10 to 30% by weight of magnesium, 1 to 5% by weight of titanium, 1 to 20% by weight of component (c), and 0.05 to 2% of component (d). % By weight, and 40 to 70% by weight of halogen atoms.

The catalyst for olefin polymerization of the present invention is formed.
Aluminum compound (B) (hereinafter referred to as
Below, it may be referred to as “component (B)”. )
General formula R^Two _pAlQ_3-p(Where R^TwoIs an alkyl group having 1 to 4 carbon atoms
And Q represents a hydrogen atom or a halogen atom, and p
Is an integer of 0 <p ≦ 3. )
Can be Such organoaluminum compounds
Specific examples of (B) include triethylaluminum and diethylaluminum.
Ethyl aluminum chloride, tri-iso-butyl
Aluminum, diethyl aluminum bromide, die
Chill aluminum hydride, one or more
Can be used in two or more types. Preferably, triethylal
Minium, tri-iso-butyl aluminum.

The organosilicon compound (C) (hereinafter sometimes referred to as “component (C)”) used in forming the olefin polymerization catalyst of the present invention is represented by the general formula R ³ _q.
Si (OR ⁴ ) _4-q (wherein, R ³ is an alkyl group having 1 to 12 carbon atoms,
Cycloalkyl group, phenyl group, vinyl group, allyl group,
Represents an aralkyl group, which may be the same or different.
R ⁴ represents an alkyl group having 1 to ⁴ carbon atoms, a cycloalkyl group, a phenyl group, a vinyl group, an allyl group, an aralkyl group,
They may be the same or different. q is an integer of 0 ≦ q ≦ 3. ) Is used. Examples of such an organosilicon compound include phenylalkoxysilane, alkylalkoxysilane, phenylalkylalkoxysilane, cycloalkylalkoxysilane, and cycloalkylalkylalkoxysilane.

Specific examples of the above organosilicon compounds include trimethylmethoxysilane, trimethylethoxysilane, tri-n-propylmethoxysilane, tri-n
-Propylethoxysilane, tri-n-butylmethoxysilane, tri-iso-butylmethoxysilane, tri-
t-butylmethoxysilane, tri-n-butylethoxysilane, tricyclohexylmethoxysilane, tricyclohexylethoxysilane, cyclohexyldimethylmethoxysilane, cyclohexyldiethylmethoxysilane, cyclohexyldiethylethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, di- n
-Propyldimethoxysilane, di-iso-propyldimethoxysilane, di-n-propyldiethoxysilane,
Di-iso-propyldiethoxysilane, di-n-butyldimethoxysilane, di-iso-butyldimethoxysilane, di-t-butyldimethoxysilane, di-n-butyldiethoxysilane, n-butylmethyldimethoxysilane, bis (2-ethylhexyl) dimethoxysilane, bis (2-ethylhexyl) diethoxysilane, dicyclopentyldimethoxysilane, dicyclopentyldiethoxysilane, dicyclohexyldimethoxysilane, dicyclohexyldiethoxysilane, bis (3-methylcyclohexyl) dimethoxysilane, bis (3-methylhexyl) dimethoxysilane 4-methylcyclohexyl) dimethoxysilane, bis (3,5-dimethylcyclohexyl) dimethoxysilane, cyclohexylcyclopentyldimethoxysilane, cyclohexylcyclopentyldiethoxysila , Cyclohexyl cyclopentyl distearate propoxysilane, 3 - methylcyclohexyl cyclopentyl dimethoxysilane, 4 - methylcyclohexyl cyclopentyl dimethoxysilane, 3,5 - dimethyl cyclohexyl cyclopentyl dimethoxy silane, 3 - methylcyclohexyl cyclohexyl dimethoxysilane,
4-methylcyclohexylcyclohexyldimethoxysilane, 3,5-dimethylcyclohexylcyclohexyldimethoxysilane, cyclopentylmethyldimethoxysilane, cyclopentylmethyldiethoxysilane, cyclopentylethyldiethoxysilane, cyclopentyl (is
o-propyl) dimethoxysilane, cyclopentyl (i
(so-butyl) dimethoxysilane, cyclohexylmethyldimethoxysilane, cyclohexylmethyldiethoxysilane, cyclohexylethyldimethoxysilane, cyclohexylethyldiethoxysilane, cyclohexyl (n-propyl) dimethoxysilane, cyclohexyl (iso-propyl) dimethoxysilane, cyclohexyl (n -Propyl) diethoxysilane, cyclohexyl (iso-butyl) dimethoxysilane, cyclohexyl (n-butyl) diethoxysilane, cyclohexyl (n
-Pentyl) dimethoxysilane, cyclohexyl (n-
(Pentyl) diethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, phenylmethyldimethoxysilane, phenylmethyldiethoxysilane, phenylethyldimethoxysilane, phenylethyldiethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxy Silane, ethyltriethoxysilane, n-propyltrimethoxysilane, i
so-propyltrimethoxysilane, n-propyltriethoxysilane, iso-propyltriethoxysilane, n-butyltrimethoxysilane, iso-butyltrimethoxysilane, t-butyltrimethoxysilane, n
-Butyltriethoxysilane, 2-ethylhexyltrimethoxysilane, 2-ethylhexyltriethoxysilane,
Cyclopentyltrimethoxysilane, cyclopentyltriethoxysilane, cyclohexyltrimethoxysilane, cyclohexyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, tetramethoxysilane, tetraethoxysilane, tetrapropoxy Examples thereof include silane and tetrabutoxysilane. Among the above, di-n-propyldimethoxysilane, di-iso-propyldimethoxysilane, di-n
-Butyldimethoxysilane, di-iso-butyldimethoxysilane, di-t-butyldimethoxysilane, di-n
-Butyldiethoxysilane, t-butyltrimethoxysilane, dicyclohexyldimethoxysilane, dicyclohexyldiethoxysilane, cyclohexylmethyldimethoxysilane, cyclohexylmethyldiethoxysilane,
Cyclohexylethyldimethoxysilane, cyclohexylethyldiethoxysilane, dicyclopentyldimethoxysilane, dicyclopentyldiethoxysilane, cyclopentylmethyldimethoxysilane, cyclopentylmethyldiethoxysilane, cyclopentylethyldiethoxysilane, cyclohexylcyclopentyldimethoxysilane, cyclohexylcyclopentyldiethoxysilane,
3-Methylcyclohexylcyclopentyldimethoxysilane, 4-methylcyclohexylcyclopentyldimethoxysilane, and 3,5-dimethylcyclohexylcyclopentyldimethoxysilane are preferably used, and the organosilicon compound (C) can be used alone or in combination of two or more. .

Next, the olefin polymerization catalyst of the present invention is
It comprises the above-mentioned olefin polymerization solid catalyst component (A), component (B), and component (C), and performs polymerization or copolymerization of olefins in the presence of the catalyst. As olefins, ethylene, propylene, 1-butene, 1-
Penten, 4-methyl-1-pentene, vinylcyclohexane and the like, and these olefins can be used alone or in combination of two or more. Above all, ethylene,
Propylene and 1-butene are preferably used. Particularly preferred is propylene. For the polymerization of propylene,
Copolymerization with other olefins can also be performed. The olefins to be copolymerized include ethylene, 1-butene, 1-pentene, 4-methyl-1-pentene, vinylcyclohexane and the like, and these olefins can be used alone or in combination of two or more. In particular, ethylene and 1-butene are preferably used.

The amount ratio of each component is not particularly limited as long as it does not affect the effect of the present invention, and the component (B) is usually a solid catalyst component for olefin polymerization ( 1 to 2 per mole of titanium atom in A)
000 mol, preferably in the range of 50 to 1000 mol. Component (C) is used per mole of component (B),
0.002 to 10 mol, preferably 0.01 to 2 mol,
Particularly preferably, it is used in the range of 0.01 to 0.5 mol.

The order of contact of each component is arbitrary, but first, an organoaluminum compound (B) is charged into a polymerization system, and then an organosilicon compound (C) is brought into contact with the polymerization system. It is desirable to contact A).

The polymerization method of the present invention can be carried out in the presence or absence of an organic solvent, and the olefin monomer such as propylene can be used in any of a gas and a liquid. The polymerization temperature is 200 ° C. or lower, preferably 100 ° C. or lower, and the polymerization pressure is 10 MPa or lower, preferably 5 MPa or lower. Further, any of a continuous polymerization method and a batch polymerization method can be used. Further, the polymerization reaction may be performed in one stage, or may be performed in two or more stages.

Further, in the present invention, when the olefin is polymerized using a catalyst comprising the solid catalyst component (A), component (B), and component (C) for olefin polymerization (also referred to as main polymerization), the catalyst activity. In order to further improve the stereoregularity and the particle properties of the produced polymer, it is desirable to carry out a preliminary polymerization prior to the main polymerization. In the prepolymerization, the same monomers as olefins or styrene used in the main polymerization can be used.

In carrying out the prepolymerization, the order of contact of each component and monomer is arbitrary, but preferably, the component (B) is first charged into a prepolymerization system set in an inert gas atmosphere or an olefin gas atmosphere. Then, after contacting the solid catalyst component (A) for olefin polymerization, an olefin such as propylene and / or one or more other olefins are contacted. When prepolymerization is performed by combining component (C), component (B) is first charged into a prepolymerization system set in an inert gas atmosphere or an olefin gas atmosphere, and then component (C) is contacted. A preferred method is to bring the solid catalyst component for polymerization of olefins (A) into contact, and then contact an olefin such as propylene and / or one or more other olefins.

When polymerization of olefins is carried out in the presence of the catalyst for polymerization of olefins formed according to the present invention, an extremely high yield can be obtained while maintaining high stereoregularity as compared with the case where a conventional catalyst is used. To obtain an olefin polymer.

[0060]

EXAMPLES Examples of the present invention will be specifically described below in comparison with comparative examples. Example 1 [Preparation of solid catalyst component (A) for polymerization of solid catalytic olefins] Diethoxymagnesium 10 was placed in a 500 ml round bottom flask equipped with a stirrer, which had been sufficiently substituted with nitrogen gas.
g and 80 ml of toluene were put into a suspended state.
Then, 20 ml of titanium tetrachloride was added to the suspension, and the temperature was raised. When the temperature reached 80 ° C., di-n-butyl phthalate 3.4.
A solution in which ml was dissolved was added, and the temperature was further raised to 110 ° C. Thereafter, the reaction was carried out with stirring at 110 ° C. for 1 hour. After completion of the reaction, the mixture was washed three times with 100 ml of toluene at 90 ° C., and 0.12 g of trans-1,2-cyclohexanediol was previously added to 20 ml of titanium tetrachloride and 80 ml of toluene, and a solution stirred at room temperature for 1 hour was added. The temperature was raised to 110 ° C., and the reaction was carried out with stirring for 1 hour. After the reaction, n-heptane 1 at 40 ° C.
After washing 7 times with 00 ml, a solid catalyst component was obtained. In addition, when the solid-liquid in this solid catalyst component was separated and the titanium content in the solid content was measured, it was 2.9% by weight.

[Formation and Polymerization of Polymerization Catalyst] In a 2.0-liter autoclave equipped with a stirrer completely purged with nitrogen gas, 1.32 mmol of triethylaluminum was added.
Cyclohexylcyclopentyldimethoxysilane 0.1
3 mmol and 0.1% of the solid catalyst component as titanium atom.
0026 mmol was charged to form a polymerization catalyst. afterwards,
2.0 liters of hydrogen gas and 1.4 liters of liquefied propylene were charged, and after preliminarily polymerizing at 20 ° C. for 5 minutes, the temperature was raised and the polymerization reaction was performed at 70 ° C. for 1 hour. The polymerization activity per gram of the solid catalyst component is 51,100 g-PP / g-c.
at. Met. The melt index value (MI) of the polymer (a) (measurement method was according to ASTM D 1238, JIS K 7210) was 7.9 g / 10 minutes. The polymerization activity per solid catalyst component used here was calculated by the following equation. Polymerization activity = (a) 224.0 (g) / solid catalyst component 0.
00438 (g) When the polymer was extracted with boiling n-heptane for 6 hours, the polymer (b) insoluble in n-heptane was 220.2
g, and the ratio of boiling n-heptane insolubles in the polymer was 98.5% by weight.

Comparative Example 1 An experiment was carried out in the same manner as in Example 1 except that trans-1,2-cyclohexanediol was not added. As a result, the titanium content in the solid catalyst component was 2.9% by weight.
Polymerization activity per gram of solid catalyst component is 42,400 g-PP
/ g-cat. The melt index value (MI) of the polymer (a) was 6.6 g / 10 minutes. The ratio of boiling n-heptane insolubles in the polymer was 98.7% by weight.

From the above results, it can be seen that the polymerization of olefins using the solid catalyst component and the catalyst of the present invention can provide a high yield of olefin polymers.

[0064]

Industrial Applicability The olefin polymerization catalyst of the present invention can obtain an olefin polymer in an extremely high yield while maintaining high stereoregularity at a high level. Accordingly, general-purpose polyolefins can be provided at low cost, and are expected to be useful in the production of olefin copolymers having high functionality.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a process for preparing an olefin polymerization catalyst of the present invention.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takuma Yoshida 3-3-5 Chigasaki, Chigasaki-shi, Kanagawa Toho Titanium Co., Ltd. (72) Inventor Maki Sato 3-3-5 Chigasaki, Chigasaki-shi, Kanagawa Toho Titanium Co., Ltd. F term (for reference) 4J028 AA01A AB01A AC05A AC06A BA00A BA01A BA02B BB00A BB01B BC05A BC06A BC07A BC15B BC16B BC27B BC34B CA08A CA15A CA16A CB12 GB CB24A CB26 AB CB CB CB CB CB CB CB CB CB CB CB CB CB CB CB CB CB CB CB

Claims (4)

[Claims] (1) a magnesium compound, (b) a tetrasalt
Titanium oxide, (c) phthalic acid diester, and (d) below
The general formula (1);¹)_mX (OH)_n (1) ｛where R¹Is an alkyl group having 1 to 5 carbon atoms or halogen
And a substituent R ¹The number m is 0, 1 or 2
And the number n of hydroxyl groups is 2 or 3, and X is cyclopentene.
Hydrogen (m + n) atoms from tan or cyclohexane
Indicates a removed group. Formed from a cyclic alcohol represented by｝
A solid catalyst for olefins polymerization characterized by being formed
component. 2. The solid catalyst component for olefin polymerization according to claim 1, wherein the magnesium compound is a dialkoxymagnesium. 3. The method according to claim 2, wherein the cyclic alcohol is cis-1,2-
The solid catalyst component for olefins polymerization according to claim 1 or 2, wherein the solid catalyst component is cyclohexanediol or trans-1,2-cyclohexanediol. 4. A solid catalyst component for olefin polymerization according to any one of claims 1 to 3, wherein (B) the following general formula (2): R ² _p AlQ _3-p (2) ( In the formula, R ² represents an alkyl group having 1 to 4 carbon atoms, Q represents a hydrogen atom or a halogen atom, and p is an integer of 0 <p ≦ 3. C) The following general formula (3): R ³ _q Si (OR ⁴ ) _4-q (3) (wherein R ³ is an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group, a phenyl group, a vinyl group, an allyl R ⁴ represents an alkyl group having 1 to ⁴ carbon atoms, a cycloalkyl group, a phenyl group, a vinyl group, an allyl group, or an aralkyl group, and may be the same or different. And q is an integer of 0 ≦ q ≦ 3). Catalyst for polymerization of olefins which is characterized in that.