JP6809374B2 - A method for producing a solid catalyst component for α-olefin polymerization, and a method for producing an α-olefin polymer using the same. - Google Patents

Description

The present invention relates to a method for producing a solid catalyst component for α-olefin polymerization and a method for producing an α-olefin polymer using the same, and more specifically, it is used for a catalyst exhibiting sufficient performance in terms of catalytic performance such as catalytic activity. A method for producing a solid catalyst component used for a catalyst in which a solid catalyst component, specifically, catalytic activity, hydrogen responsiveness, and the density of the obtained polymer all exhibit good performance, and an α-olefin polymer using the same. Regarding the manufacturing method.

Polyolefins such as polyethylene and polypropylene are the most important plastic materials as industrial materials, and are used as extruded products for packaging materials and electrical materials, injection molded products for industrial materials such as automobile parts and home appliances, and further. It is widely used for various purposes such as textile materials and building materials.
Due to the wide variety of applications, polyolefins continue to be required to be improved and improved in various properties from the aspect of their applications, and in order to meet those demands, the polymerization catalyst is mainly improved. Technology development has been developed.

A Ziegler-based catalyst using a transition metal compound and an organometallic compound enhanced the catalytic activity and realized industrial production, but after that, the physical properties of the polymer were improved and the particle properties were controlled by controlling the molecular weight distribution. Various performance improvements have been made, such as improved stable productivity of the plant.
Specifically, a catalyst using a solid catalyst component containing a magnesium compound as a catalyst carrier and titanium and halogen as essential components has been developed. Further, a catalyst in which an electron donating compound is used to enhance the catalytic activity and stereoregularity (see, for example, Patent Document 1), and then a specific organosilicon compound is used to enhance the catalytic activity and stereoregularity. A catalyst having a higher value is also proposed (see, for example, Patent Documents 2 and 3).
Further, by using a silicon compound having a special structure having an alkenyl group such as a vinyl group or an allyl group in combination with a specific organosilicon compound, not only the catalytic activity and stereoregularity are further improved, but also the molecular weight Performance improvements such as improved response of hydrogen used as a regulator have also been proposed (see, for example, Patent Documents 4 to 6).
Further, a technique has been proposed in which the bulk density of the obtained polymer is high, the particle properties are improved, and the productivity of the polymer is increased by using a specific dialkoxymagnesium as the magnesium source (see, for example, Patent Document 7). .).

Japanese Unexamined Patent Publication No. 58-138706 Japanese Unexamined Patent Publication No. 62-187707 Japanese Unexamined Patent Publication No. 61-171715 Japanese Unexamined Patent Publication No. 03-234707 Japanese Unexamined Patent Publication No. 07-2923 Japanese Unexamined Patent Publication No. 2006-169283 Japanese Unexamined Patent Publication No. 08-283329

However, none of these catalyst systems exhibits sufficient catalytic performance in terms of catalytic activity for the α-olefin polymer produced, hydrogen responsiveness, density of the obtained polymer, and the like. It is desired to develop a technology for further improving the performance.

An object of the present invention is to provide a catalyst that exhibits good catalytic performance such as catalytic activity in the context of the prior art, specifically, catalytic activity, hydrogen responsiveness, and the density of the obtained polymer. It is an object of the present invention to provide a solid catalyst component for α-olefin polymerization for a catalyst showing the above, and a method for producing an α-olefin polymer using the same.

In view of the above problems, the present inventors have conducted a general thought and search on the properties and chemical structures of various catalyst components in the Ziegler catalyst, and have diligently studied various catalyst components and production conditions. ..
As a result, the present inventors have obtained a prepolymerization treatment product (A1) obtained by prepolymerizing a solid component containing titanium, magnesium, a halogen and an electron donating compound as essential components, and silane having an alkenyl group. By aging with compound (A2), it was found that a polymerization catalyst exhibiting good performance in terms of catalytic activity, hydrogen responsiveness, and polymer density can be obtained, and based on these findings, the present invention has been completed. It was.

That is, according to the first invention of the present invention, it is a method for producing a solid catalyst component (A) for α-olefin polymerization.
Including the step of contacting the following components (A1) and (A2) to form a contact product, the contact product is brought into contact with the component (A1) and the component (A2) for the first time for one day. Provided is a method for producing a solid catalyst component (A) for α-olefin polymerization, which comprises aging after a waiting time of 180 days or less.
Component (A1): Prepolymerization treatment product obtained by contacting a solid component (A1') containing titanium, magnesium, halogen and an electron donating compound as essential components with an ethylenically unsaturated hydrocarbon in an inert solvent. Component (A2): Silane compound having an alkenyl group

According to the second invention of the present invention, it is a method for producing a solid catalyst component (A) for α-olefin polymerization.
A step of contacting the following component (A1') with an ethylenically unsaturated hydrocarbon in an inert solvent to produce a prepolymerized product (A1).
The prepolymerization treatment product (A1) and the component (A2) are brought into contact with each other to form a contact product, and the contact product is brought into contact with the component (A1) and the component (A2) for the first time as a starting point. Provided is a method for producing a solid catalyst component (A) for α-olefin polymerization, which comprises aging after a waiting time of 1 day or more and 180 days or less.
Component (A1'): Solid component containing titanium, magnesium, halogen and electron donating compound as essential components Component (A2): Silane compound having an alkenyl group

According to a third invention of the present invention, the α-olefin polymerization according to the first or second invention, wherein the contact product is aged with a waiting time of 3 days or more and 90 days or less. A method for producing the solid catalyst component (A) for use is provided.

According to the fourth invention of the present invention, there is provided the method for producing the solid catalyst component (A) for α-olefin polymerization according to any one of the first to third inventions, wherein the component (A2) is a vinylsilane compound. To.

According to the fifth invention of the present invention, the solid catalyst component (A) for α-olefin polymerization produced by the production method according to any one of the first to fourth inventions, the following component (B), and the following Provided is a method for producing an α-olefin polymer, which comprises contacting and polymerizing an α-olefin with a polymerization catalyst containing the component (C) of the above.
Component (B): Organoaluminium compound Component (C): Alkoxysilane compound [However, it is different from the silane compound having an alkenyl group. ]

The α-olefin polymerization catalyst using the solid catalyst component for α-olefin polymerization produced by the production method of the present invention has higher catalytic activity than the conventional catalyst and is excellent in yield at the time of polymerization. Therefore, the α-olefin polymer according to the present invention has high productivity in the plant.
Further, the α-olefin polymer polymerized by the α-olefin polymerization catalyst using the solid catalyst component for α-olefin polymerization produced by the present invention has a high polymer density and a higher mechanical strength. Become.

It is a flowchart for demonstrating the concept of this invention.

Hereinafter, the present invention will be described in detail for each item.
1. 1. Solid catalyst component for α-olefin polymerization (A)
The present invention (first and second inventions) is a method for producing a solid catalyst component (A) for α-olefin polymerization.
The present invention (first invention) includes a step of contacting the following components (A1) and (A2) to form a contact product, and the contact product is first produced by the component (A1) and the component (A2). It is characterized by aging with a waiting time of 1 day or more and 180 days or less, starting from the point of contact.
Component (A1): Prepolymerization treatment product obtained by contacting a solid component (A1') containing titanium, magnesium, halogen and an electron donating compound as essential components with an ethylenically unsaturated hydrocarbon in an inert solvent. Component (A2): Silane compound having an alkenyl group

The present invention (second invention) is a step of contacting the following component (A1') with an ethylenically unsaturated hydrocarbon in an inert solvent to produce a prepolymerization treatment product (A1).
The step of contacting the prepolymerization treatment product (A1) and the component (A2) to form a contact product is included, and the contact product is started from the time when the component (A1) and the component (A2) are first contacted. It is characterized by aging with a waiting time of 1 day or more and 180 days or less.
Component (A1'): Solid component containing titanium, magnesium, halogen and electron donating compound as essential components Component (A2): Silane compound having an alkenyl group In the above-mentioned first and second inventions, titanium, magnesium and halogen And a component (A1') which is a solid component containing an electron-donating compound as an essential component, and a component (A1) which is a prepolymerized product obtained by contacting the component (A1') with an ethylenically unsaturated hydrocarbon. The component (A2), which is a silane compound having an alkenyl group, is a common term, and these are collectively described below. FIG. 1 shows a flowchart of an example of the method for producing the solid catalyst component (A) for α-olefin polymerization in the present invention (first and second inventions).

(1) Ingredient (A1')
The component (A1') used in the present invention is a solid component containing titanium, magnesium, halogen and an electron donating compound as essential components. Here, "containing as an essential component" indicates that, in addition to the four components listed, any component may be contained in any form as long as the effects of the present invention are not impaired.

(1-1) Titanium Any titanium compound (A1a) can be used as the titanium source of titanium used in the component (A1') according to the present invention. As a typical example of the titanium compound, the compound disclosed in JP-A-3-234707 can be mentioned.
Regarding the valence of titanium, titanium compounds having arbitrary valences of tetravalent, trivalent, divalent and 0 valent can be used, but tetravalent and trivalent titanium compounds are preferable, and tetravalent is more preferable. It is preferable to use the titanium compound of.

Specific examples of the tetravalent titanium compound include titanium halide compounds represented by titanium tetrachloride, alkoxy titanium compounds represented by tetrabutoxy titanium, and tetrabutoxy titanium dimer (BuO) ₃ Ti-O-Ti ( OBu) Condensed compounds of alkoxytitanium having a Ti—O—Ti bond typified by ₃ , organic metal titanium compounds typified by dicyclopentadienyltitanium dichloride, and the like can be mentioned. Of these, titanium tetrachloride and tetrabutoxytitanium are particularly preferable.
Moreover, as a specific example of a trivalent titanium compound, a halogenated titanium compound represented by titanium trichloride can be mentioned. As the titanium trichloride, a compound produced by any known method such as a hydrogen reduction type, a metal aluminum reduction type, a metal titanium reduction type, and an organoaluminum reduction type can be used.

The above titanium compounds can be used not only alone but also in combination with a plurality of compounds. Further, a mixture of the above titanium compounds, a compound whose average composition formula is a mixture thereof (for example, a compound such as Ti (OBu) _m Cl _4-m ; 0 <m <4), and a phthalate ester. Complexes with other compounds such as Ph (CO ₂ Bu) ₂ , TiCl ₄ and the like can be used.

(1-2) Magnesium Any magnesium compound (A1b) can be used as the magnesium source of magnesium used in the component (A1') according to the present invention. As a typical example of the magnesium compound, the compound disclosed in JP-A-3-234707 can be mentioned.
Generally, magnesium halide compounds typified by magnesium chloride, alkoxymagnesium compounds typified by diethoxymagnesium, metallic magnesium, oxymagnesium compounds typified by magnesium oxide, and magnesium hydroxide are typified. Hydroxymagnesium compounds, Grinard compounds typified by butylmagnesium chloride, organic magnesium compounds typified by butylethylmagnesium, inorganic and organic acid magnesium salt compounds typified by magnesium carbonate and magnesium stearate, and A mixture thereof or a compound in which the average composition formula is a mixed formula thereof (for example, a compound such as Mg (OEt) _m Cl _2-m ; 0 <m <2) can be used.
Of these, magnesium chloride, diethoxymagnesium, metallic magnesium and butylmagnesium chloride are preferable.

(1-3) Halogen As the halogen used in the component (A1') according to the present invention, fluorine, chlorine, bromine, iodine, and a mixture thereof can be used. Of these, chlorine is particularly preferable.
The halogen is generally supplied from the above-mentioned titanium compound as a titanium source and / or a magnesium compound as a magnesium source, but can also be supplied from another halogen compound (A1c). Typical examples of other halogen compounds include silicon halide compounds represented by silicon tetrachloride, aluminum halogenated compounds represented by aluminum chloride, and halogens represented by 1,2-dichloroethane and benzyl chloride. Organic compounds, halogenated borane compounds typified by trichloroborane, halogenated phosphorus compounds typified by phosphorus pentachloride, tungsten halide compounds typified by tungsten hexachloride, typified by molybdenum pentoxide Halogenated molybdenum compounds and the like can be mentioned. These compounds can be used not only alone but also in combination. Of these, silicon tetrachloride is particularly preferable.

(1-4) Electron-donating compound As the electron-donating compound (A1d) used in the component (A1') according to the present invention, any compound can be used. As a typical example of the electron donating compound, the compound disclosed in JP-A-2004-124090 can be mentioned.
In general, organic acids and inorganic acids and their derivatives (esters, acid anhydrides, acid halides, amides) compounds, ether compounds, ketone compounds, aldehyde compounds, alcohol compounds, amine compounds, etc. Is preferably used.

Examples of the organic acid include aromatic polyvalent carboxylic acid compounds typified by phthalic acid, aromatic carboxylic acid compounds typified by benzoic acid, and one in two positions such as 2-n-butyl-malonic acid. Representative of succinic acid having one or two substituents at the 2-position or one or more substituents at the 2- and 3-positions, such as malonic acid having two substituents and 2-n-butyl-succinic acid. Carboxylic acid compounds such as aliphatic polyvalent carboxylic acid compounds, aliphatic carboxylic acid compounds typified by propionic acid, aromatic and aliphatic sulfonic acid compounds typified by benzene sulfonic acid and methane sulfonic acid. Kind, etc. can be exemplified.
These carboxylic acid compounds and sulfonic acid compounds may have an arbitrary number of unsaturated bonds at arbitrary positions in the molecule, such as maleic acid, regardless of whether they are aromatic or aliphatic.

Examples of the organic acid derivative compounds include the above-mentioned organic acid esters, acid anhydrides, acid halides, amides, and the like.
Aliphatic and aromatic alcohols can be used as the alcohol which is a component of the ester. Among these alcohols, an alcohol composed of an aliphatic hydrocarbon group having 1 to 20 carbon atoms such as an ethyl group, a butyl group, an isobutyl group, a heptyl group, an octyl group and a dodecyl group is preferable. Further, an alcohol composed of an aliphatic hydrocarbon group having 2 to 12 carbon atoms is preferable. Further, an alcohol composed of an alicyclic hydrocarbon group such as a cyclopentyl group, a cyclohexyl group or a cycloheptyl group can also be used.

As the halogen which is a component of the acid halide, fluorine, chlorine, bromine, iodine, etc. can be used. Of these, chlorine is the most preferable. In the case of polyhalides of polyvalent organic acids, the plurality of halogens may be the same or different.
Aliphatic and aromatic amines can be used as the amine which is a component of the amide. Among these amines, aliphatic amines typified by ammonia, ethylamine and dibutylamine, amines having an aromatic hydrocarbon group typified by aniline and benzylamine in the molecule, and the like can be exemplified as preferable compounds. it can.

Examples of the inorganic acid include carbonic acid, phosphoric acid, silicic acid, sulfuric acid, nitric acid, and the like.
As the derivative compound of the inorganic acid, it is preferable to use the ester of the above-mentioned inorganic acid. Specific examples thereof include tetraethoxysilane (ethyl silicate), tetrabutoxysilane (butyl silicate), and tributyl phosphate.

Examples of the ether compounds include aliphatic ether compounds typified by dibutyl ether, aromatic ether compounds typified by diphenyl ether, 2-isopropyl-2-isobutyl-1,3-dimethoxypropane and 2-isopropyl-2-. Aliphatic polyvalent ether compounds typified by 1,3-dimethoxypropane having one or two substituents at the 2-position such as isopentyl-1,3-dimethoxypropane, 9,9-bis (methoxymethyl). Examples thereof include polyvalent ether compounds having an aromatic hydrocarbon group typified by fluorene in the molecule.

Ketone compounds include aliphatic ketone compounds typified by methyl ethyl ketone, aromatic ketone compounds typified by acetophenone, and 2,2,4,6,6-pentamethyl-3,5-heptandione. Examples thereof include polyvalent ketone compounds.
Examples of the aldehyde compounds include aliphatic aldehyde compounds typified by propionaldehyde, aromatic aldehyde compounds typified by benzaldehyde, and the like.
Alcohol compounds include aliphatic alcohol compounds typified by butanol and 2-ethylhexanol, phenols, phenol derivative compounds typified by cresol, glycerin and 1,1'-bis-2-naphthol. Examples thereof include aliphatic or aromatic polyhydric alcohol compounds.

Examples of amine compounds include aliphatic amine compounds typified by diethylamine, nitrogen-containing alicyclic compounds typified by 2,2,6,6-tetramethyl-piperidin, and aromatic amine compounds typified by aniline. Examples include polyvalent amine compounds typified by 1,3-bis (dimethylamino) -2,2-dimethylpropane, and nitrogen atom-containing aromatic compounds.

Further, as the electron donating compound (A1d), a compound containing the above-mentioned plurality of functional groups in the same molecule can also be used. Examples of such compounds are 2-benzoyl-benzoic acid, which are ester compounds having an alkoxy group in the molecule represented by ethyl acetate- (2-ethoxyethyl) and ethyl 3-ethoxy-2-t-butylpropionate. Ketoester compounds typified by ethyl, ketoether compounds typified by (1-t-butyl-2-methoxyethyl) methylketone, represented by N, N-dimethyl-2,2-dimethyl-3-methoxypropylamine Amino ether compounds, halogeno ether compounds typified by epoxy chloropropane, and the like can be mentioned.

These electron donating compounds (A1d) can be used alone or in combination of a plurality of compounds.

Of these, preferred are diethyl phthalate, dibutyl phthalate, diisobutyl phthalate, phthalate ester compounds typified by diheptyl phthalate, phthalate halide compounds typified by phthaloyl dichloride, 2-n-. Malonate compounds having one or two substituents at the 2-position such as diethyl butyl-malonate, one or two substituents or 2 at the 2-position such as diethyl 2-n-butyl-succinate Of succinate compounds having one or more substituents at the positions and 3-positions, 2-isopropyl-2-isobutyl-1,3-dimethoxypropane and 2-isopropyl-2-isopentyl-1,3-dimethoxypropane. Aliphatic polyvalent ether compounds typified by 1,3-dimethoxypropane having one or two substituents at the 2-position, and aromatic charcoal typified by 9,9-bis (methoxymethyl) fluorene. Polyvalent ether compounds having a hydrogen group in the molecule and the like.

(1-5) Preparation of component (A1') The amount of each component constituting the component (A1') according to the present invention may be arbitrary as long as the effect of the present invention is not impaired, but is generally used. Is preferably within the following range.

The amount of the titanium compound (A1a) used is a molar ratio (number of moles of the titanium compound / number of moles of the magnesium compound) to the amount of the magnesium compound (A1b) used, and is preferably 0.0001 to 1,000. It is in the range of 0.001 to 100, more preferably in the range of 0.01 to 50.

When a compound serving as a halogen source (that is, a halogen compound (A1c)) is used in addition to the magnesium compound (A1b) and the titanium compound (A1a), the amount used is whether each of the magnesium compound and the titanium compound contains halogen. Regardless of whether or not it is used, the molar ratio (number of moles of halogen compound / number of moles of magnesium compound) to the amount of magnesium compound (A1b) used is preferably in the range of 0.01 to 1,000. , More preferably in the range of 0.1 to 100.

The amount of the electron-donating compound (A1d) used is a molar ratio (number of moles of the electron-donating compound / number of moles of the magnesium compound) to the amount of the magnesium compound (A1b) used, and is preferably 0.001 to 1. It is in the range of 10, and more preferably in the range of 0.01 to 5.

The component (A1') according to the present invention is obtained by contacting each of the above-mentioned constituent components, preferably in the above-mentioned amount used.
As the contact conditions for each component, any condition can be used as long as the effects of the present invention are not impaired. In general, the contact is preferably carried out under an inert gas atmosphere or in an inert solvent, and the following conditions are further preferable.
The contact temperature is about −50 to 200 ° C., preferably 0 to 150 ° C. Examples of the contact method include a method of contacting by stirring in an inert solvent.

When preparing the component (A1'), washing with an intermediate and / or finally an inert solvent may be carried out.

Examples of the preferred inert solvent for washing include an aliphatic hydrocarbon compound such as heptane and an aromatic hydrocarbon compound such as toluene. These solvents can be used alone or in combination of two or more.

Any method can be used as the method for preparing the component (A1') according to the present invention, and specifically, the method described below can be exemplified. However, the present invention is not limited by the following examples.

(I) Co-grinding method This is a method of supporting a titanium compound on a magnesium compound by co-grinding a magnesium halide compound typified by magnesium chloride and a titanium compound. The electron donating compound may be pulverized at the same time or in a separate step. As the mechanical crushing method, any crushing machine such as a rotary ball mill or a vibration mill can be used. Not only a dry pulverization method that does not use a solvent, but also a wet pulverization method that co-pulverizes in the presence of an inert solvent can be used.

(Ii) Heat Treatment Method This is a method in which a magnesium halide compound typified by magnesium chloride and a titanium compound are stirred in an inert solvent to carry out a contact treatment to support the titanium compound on the magnesium compound. The electron donating compound may be contact-treated at the same time or in a separate step. When a liquid compound such as titanium tetrachloride is used as the titanium compound, the contact treatment can be performed without an inert solvent. Further, if necessary, arbitrary components such as a silicon halide compound may be brought into contact with each other at the same time or in a separate step. Although the contact temperature is not particularly limited, it is often preferable to heat the contact temperature to a relatively high temperature of about 90 ° C. to 130 ° C. for the contact treatment.

(Iii) Dissolution and Precipitation Method A magnesium halide compound typified by magnesium chloride is dissolved by contacting it with an electron donating compound, and the resulting solution is brought into contact with a precipitation agent to cause a precipitation reaction to form particles. It is a method including a step.
Examples of electron-donating compounds used for dissolution include alcohol compounds, epoxy compounds, phosphate ester compounds, silicon compounds having an alkoxy group, titanium compounds having an alkoxy group, ether compounds, and the like. Can be done. Examples of precipitants include titanium halide compounds, silicon halide compounds, hydrogen chloride, halogen-containing hydrocarbon compounds, siloxane compounds having a Si—H bond (including polysiloxane compounds), and aluminum compounds. , Etc. can be exemplified. As a method of contacting the dissolution liquid and the precipitation agent, the precipitation agent may be added to the dissolution liquid, or the dissolution liquid may be added to the precipitation agent. When the titanium compound is not used in either the dissolution or precipitation step, the titanium compound is supported on the magnesium compound by further contacting the particles formed by the precipitation reaction with the titanium compound. Further, if necessary, the particles thus formed may be brought into contact with arbitrary components such as titanium halide compounds, silicon halogenated compounds, and electron donating compounds. At this time, the electron donating compound may be different from that used for dissolution, or may be the same. The contact order of these arbitrary components is not particularly limited, and they may be contacted as an independent step, or they may be contacted together at the time of dissolution, precipitation, and contact with titanium compounds. In addition, an inert solvent may be present in any of the steps of dissolution, precipitation, and contact with an arbitrary component.

(Iv) Granulation method Similar to the dissolution precipitation method, a magnesium halide compound typified by magnesium chloride is dissolved by contacting it with an electron donating compound, and the resulting solution is granulated mainly by a physical method. It is a method including a step.
The example of the electron donating compound used for dissolution is the same as the example of the dissolution precipitation method. Examples of granulation methods include a method of dropping a high-temperature solution into a low-temperature inert solvent, a method of ejecting the solution from a nozzle toward a high-temperature gas phase part and drying it, and a method toward a low-temperature gas phase part. A method of ejecting the solution from the nozzle to cool the solution can be mentioned. The titanium compound is supported on the magnesium compound by bringing the particles formed by granulation into contact with the titanium compound. Further, if necessary, the particles thus formed may be brought into contact with an arbitrary component such as a silicon halide compound or an electron donating compound. At this time, the electron donating compound may be different from that used for dissolution, or may be the same. The contact order of these arbitrary components is not particularly limited, and they may be contacted as an independent step, or they may be contacted together at the time of dissolution or contact with a titanium compound. Further, the inert solvent may be present in any of the steps of dissolution, contact with titanium compounds, and contact with arbitrary components.

(V) Halogenation method of magnesium compound This is a method including a step of bringing a halogenating agent into contact with a magnesium compound containing no halogen to halogenate it.
Examples of halogen-free magnesium compounds include alkoxymagnesium compounds, magnesium oxide, magnesium carbonate, magnesium salts of fatty acids, and the like. When dialkoxymagnesium compounds are used, those prepared in the system by the reaction of metallic magnesium and alcohol can also be used. When this preparation method is used, it is common to form particles by granulation or the like at the stage of a magnesium compound containing no halogen as a starting material. Examples of the halogenating agent include titanium halide compounds, silicon halide compounds, phosphorus halide compounds, and the like. When the halogenated titanium compound is not used as the halogenating agent, the halogen compound formed by halogenation is further brought into contact with the titanium compound to support the titanium compound on the magnesium compound. The particles thus formed are brought into contact with the electron donating compound. Further, if necessary, the particles thus formed may be brought into contact with arbitrary components such as titanium halide compounds and silicon halogenated compounds. The contact order of these arbitrary components is not particularly limited, and they may be contacted as an independent step, or they may be contacted together at the time of halogenation of a magnesium compound containing no halogen or contact with titanium compounds. it can. Further, the inert solvent may be present in any of the steps of halogenation, contact with titanium compounds, and contact with arbitrary components.

(Vi) Precipitation method from an organic magnesium compound This is a method including a step of bringing a precipitation agent into contact with a solution of an organic magnesium compound such as a glignal compound typified by butylmagnesium chloride and a dialkylmagnesium compound.
Examples of the precipitant include titanium compounds, silicon compounds, hydrogen chloride, and the like. When the titanium compound is not used as the precipitation agent, the titanium compound is supported on the magnesium compound by further contacting the particles formed by the precipitation reaction with the titanium compound. The particles thus formed are brought into contact with the electron donating compound. Further, if necessary, the particles thus formed may be brought into contact with an arbitrary component such as titanium halide compounds and silicon halogenated compounds. The contact order of these arbitrary components is not particularly limited, and they may be contacted as an independent step, or they may be contacted together at the time of precipitation or contact with titanium compounds. Further, the inert solvent may be present in any of the steps of precipitation, contact with titanium compounds, and contact with arbitrary components.

(Vii) Impregnation Method This is a method including a step of impregnating a carrier of an inorganic compound or a carrier of an organic compound with a solution of organic magnesium compounds or a solution of a magnesium compound dissolved in an electron donating compound.
The examples of the organic magnesium compounds are the same as the examples of the precipitation method from the organic magnesium compounds. The electron donating compound used for dissolving the magnesium compound may or may not contain halogen, and the example of the electron donating compound is the same as that of the dissolution precipitation method. When the magnesium compound does not contain halogen, it is brought into contact with an arbitrary component such as titanium halide compounds or silicon halide compounds described later to contain halogen in the component (A1').
Examples of carriers for inorganic compounds include silica, alumina, magnesia, and the like. Examples of carriers for organic compounds include polyethylene, polypropylene, polystyrene, and the like. The carrier particles after the impregnation treatment are immobilized by precipitating a magnesium compound by a physical treatment such as a chemical reaction with a precipitant or drying. The example of the precipitant is the same as the example of the dissolution precipitation method. When the titanium compound is not used as the precipitate, the particles thus formed are further brought into contact with the titanium compound to support the titanium compound on the magnesium compound. Further, if necessary, the particles thus formed may be brought into contact with an arbitrary component such as a titanium halide compound or a silicon halide compound, or may be brought into contact with an electron donating compound. The contact order of these arbitrary components is not particularly limited, and they may be contacted as an independent step, or they may be contacted together at the time of impregnation, precipitation, drying, and contact with titanium compounds. Further, the inert solvent may be present in any of the steps of impregnation, precipitation, contact with titanium compounds, and contact with arbitrary components.

(Vii) Composite method The methods described in (i) to (vii) above can also be used in combination. Examples of combinations include "a method of co-grinding magnesium chloride with an electron donating compound and then heat-treating it with titanium halide compounds" and "a method of co-grinding a magnesium chloride compound with an electron donating compound and then another electron donating property. "Method of dissolving using a compound and further precipitating with a precipitant", "A method of dissolving a dialkoxymagnesium compound with an electron donating compound and precipitating it by contacting it with titanium halide compounds, and at the same time the magnesium compound is halogen "Method of converting", "By contacting carbon dioxide with a dialkoxymagnesium compound, magnesium carbonate ester magnesium compounds are produced and dissolved at the same time, and the formed solution is impregnated with silica, and then magnesium is contacted with hydrogen chloride. A method of supporting a titanium compound by halogenating the compound and at the same time precipitating and immobilizing the compound and further contacting the compound with titanium halide compounds ".

(2) Silane compound having an alkenyl group (A2')
In the present invention, the component (A1') may be contacted with the silane compound (A2') having an alkenyl group as an optional component by any method.
A silane compound having an alkenyl group exhibits a structure in which at least one hydrogen atom of monosilane (SiH ₄ ) is replaced with an alkenyl group (preferably an alkenyl group having 2 to 10 carbon atoms). The remaining hydrogen atoms remain intact, or some of the hydrogen atoms are halogen (preferably chlorine), alkyl groups (preferably hydrocarbon groups with 1-12 carbon atoms), aryl groups (preferably phenyl groups), It shows a structure substituted with an alkoxy group (preferably an alkoxy group having 1 to 12 carbon atoms) or the like.
As the silane compound (A2') having an alkenyl group used in the present invention, the compounds disclosed in JP-A-3-234707, JP-A-2003-292522, and JP-A-2006-169283 are used. be able to.

More specifically, vinylsilane, methylvinylsilane, dimethylvinylsilane, trimethylvinylsilane, trichlorovinylsilane, dichloromethylvinylsilane, chlorodimethylvinylsilane, chloromethylvinylsilane, triethylvinylsilane, chlorodiethylvinylsilane, dichloroethylvinylsilane, dimethylethylvinylsilane, diethylmethylvinylsilane. , Tripentylvinylsilane, Triphenylvinylsilane, Diphenylmethylvinylsilane, Didimethylphenylvinylsilane, CH ₂ = CH-Si (CH ₃ ) ₂ (C ₆ H ₄ CH ₃ ), (CH ₂ = CH) (CH ₃ ) ₂ Si- O-Si (CH ₃ ) ₂ (CH = CH ₂ ), divinylsilane, dichlorodivinylsilane, dimethyldivinylsilane, diphenyldivinylsilane, allyltrimethylsilane, allyltriethylsilane, allyltrivinylsilane, allylmethyldivinylsilane, allyldimethylvinylsilane , Allylmethyldichlorosilane, allyltrichlorosilane, allyltribromosilane, diallyldimethylsilane, diallyldiethylsilane, diallyldivinylsilane, diallylmethylvinylsilane, diallylmethylchlorosilane, diallyldichlorosilane, diallyldibromosilane, triallylmethylsilane, triallyl Ethylsilane, Triallylvinylsilane, Triallylchlorosilane, Triallylbromosilane, Tetraallylsilane, Di-3-butenyldimethylsilane, Di-3-butenyldiethylsilane, Di-3-butenyldivinylsilane, Di-3- Butenylmethylvinylsilane, di-3-butenylmethylchlorosilane, di-3-butenyldichlorosilane, diallyldibromosilane, triallylmethylsilane, tri-3-butenylethylsilane, tri-3-butenylvinylsilane, tri Examples thereof include -3-butenylchlorosilane, tri-3-butenylbromosilane, tetra-3-butenylsilane, and the like.
Among these, vinylsilane compound and divinylsilane compound are preferable, and trimethylvinylsilane, trichlorovinylsilane, and dimethyldivinylsilane are particularly preferable.
The silane compound (A2') having an alkenyl group can be used alone or in combination of a plurality of compounds.

The amount of the silane compound (A2') having an alkenyl group to be used may be arbitrary as long as the effects of the present invention are not impaired, but in general, it is preferably within the following range.
The amount of the silane compound (A2') having an alkenyl group used is the molar ratio (the number of moles of the silane compound (A2') having an alkenyl group / the number of moles of titanium atoms) to the titanium component constituting the component (A1'). , It is preferably in the range of 0.001 to 1,000, and more preferably in the range of 0.01 to 100.

(3) Alkoxysilane compound (A3')
In the present invention, the alkoxysilane compound (A3') may be brought into contact with the component (A1') by any method as an optional component.
As the alkoxysilane compound (A3') used in the present invention, it is generally preferable to use a compound represented by the following general formula (1).
R ¹ R ² _m Si (OR ³ ) _n ... (1)
(In the formula, R ¹ represents a hydrocarbon group or a hetero atom-containing hydrocarbon group. R ² represents a hydrogen atom, a halogen atom, a hydrocarbon group or a hetero atom-containing hydrocarbon group. R ³ represents a hydrocarbon. Represents a group. 0 ≦ m ≦ 2, 1 ≦ n ≦ 3, m + n = 3.

In the general formula (1), R ¹ represents a hydrocarbon group or a heteroatom-containing hydrocarbon group.
When R ¹ is a hydrocarbon group, it generally has 1 to 20 carbon atoms, preferably 3 to 10 carbon atoms. Specific examples of the hydrocarbon group that can be used as R ¹ include a linear aliphatic hydrocarbon group represented by an n-propyl group, a branched form represented by an i-propyl group and a t-butyl group. Examples thereof include an aliphatic hydrocarbon group, an alicyclic hydrocarbon group typified by a cyclopentyl group and a cyclohexyl group, and an aromatic hydrocarbon group typified by a phenyl group. More preferably, a branched aliphatic hydrocarbon group or an alicyclic hydrocarbon group is used as R ¹ , and in particular, an i-propyl group, an i-butyl group, a t-butyl group, a texyl group, a cyclopentyl group, etc. It is preferable to use a cyclohexyl group or the like.
When R ¹ is a heteroatom-containing hydrocarbon group, the heteroatom is preferably selected from nitrogen, oxygen, sulfur, phosphorus and silicon, particularly preferably nitrogen or oxygen. The skeleton structure of the hetero atom-containing hydrocarbon group of R ^1, is preferably selected from the example of R ¹ is a hydrocarbon group. In particular, N, N-diethylamino group, quinolino group, isoquinolino group and the like are preferable.

In the general formula (1), R ² represents a hydrogen atom, a halogen atom, a hydrocarbon group or a hetero atom-containing hydrocarbon group.
Examples of the halogen atom that can be used as R ² include fluorine, chlorine, bromine, and iodine.
When R ² is a hydrocarbon group, it generally has 1 to 20 carbon atoms, preferably 1 to 10 carbon atoms. Specific examples of the hydrocarbon group that can be used as R ² include a linear aliphatic hydrocarbon group represented by a methyl group and an ethyl group, and a branch represented by an i-propyl group and a t-butyl group. Examples thereof include an aliphatic hydrocarbon group, an alicyclic hydrocarbon group represented by a cyclopentyl group and a cyclohexyl group, and an aromatic hydrocarbon group represented by a phenyl group. Of these, methyl group, ethyl group, n-propyl group, i-propyl group, i-butyl group, s-butyl group, t-butyl group, texyl group, cyclopentyl group, cyclohexyl group and the like are preferably used.
When R ² is a hetero atom-containing hydrocarbon group, it is preferable to select from the examples when R ¹ is a hetero atom-containing hydrocarbon group. In particular, N, N-diethylamino group, quinolino group, isoquinolino group and the like are preferable.
When the value of m is 2, the two R ^2s may be the same or different. Further, regardless of the value of m, R ² may be the same as or different from R ¹ .

In the general formula (1), R ³ represents a hydrocarbon group. R ³ generally has 1 to 20 carbon atoms, preferably 1 to 10 carbon atoms, and more preferably 1 to 5 carbon atoms. Specific examples of R ³ is a linear aliphatic hydrocarbon group represented by a methyl group or an ethyl group, a branched aliphatic hydrocarbon group represented by i- propyl or t- butyl group, etc. Can be mentioned. Of these, a methyl group and an ethyl group are preferable. If the value of n is 2 or more, R ³ existing in plural numbers may be the same or different.

Preferred examples of the alkoxysilane compound (A3') that can be used in the present invention are t-Bu (Me) Si (OMe) ₂ , t-Bu (Me) Si (OEt) ₂ , and t-Bu (Et). Si (OMe) ₂ , t-Bu (n-Pr) Si (OMe) ₂ , c-Hex (Me) Si (OMe) ₂ , c-Hex (Et) Si (OMe) ₂ , c-Pen ₂ Si ( OMe) ₂ , i-Pr ₂ Si (OMe) ₂ , i-Bu ₂ Si (OMe) ₂ , i-Pr (i-Bu) Si (OMe) ₂ , n-Pr (Me) Si (OMe) ₂ , t-BuSi (OEt) ₃ , (Et ₂ N) ₂ Si (OMe) ₂ , Et ₂ N-Si (OEt) ₃ ,

、などを挙げることができる。

, Etc. can be mentioned.

The alkoxysilane compound (A3') can be used not only alone but also in combination with a plurality of compounds. Further, the alkoxysilane compound (A3') is different from the above-mentioned silane compound (A2') having an alkenyl group.

The amount of the alkoxysilane compound (A3') used may be arbitrary as long as the effects of the present invention are not impaired, but in general, it is preferably within the following range. The amount of the alkoxysilane compound (A3') used is a molar ratio to the titanium component constituting the component (A1') (the number of moles of the alkoxysilane compound (A3') / the number of moles of titanium atoms), preferably 0. It is in the range of 01 to 1,000, more preferably in the range of 0.1 to 100.

The alkoxysilane compound (A3') used in the present invention coordinates in the vicinity of a titanium atom that can be an active center, for example, a Lewis acid point on a magnesium carrier, and controls catalytic performance such as catalytic activity and polymer regularity. It is believed that it is. However, such a mechanism of action is not construed as limiting the technical scope of the present invention.

(4) Organoaluminium compound (A4')
In the present invention, the organoaluminum compound (A4') may be brought into contact with the component (A1') by any method as an arbitrary component.
As the organoaluminum compound (A4') used in the present invention, it is generally preferable to use a compound represented by the following general formula (2).
R ¹ _a AlX _b (OR ² ) _c ... (2)
(In the formula, R ¹ represents a hydrocarbon group. X represents a halogen atom or a hydrogen atom. R ² represents a hydrocarbon group or a bridging group by Al. 1 ≦ a ≦ 3, 0 ≦ b ≦ 2, 0 ≦ c ≦ 2, a + b + c = 3)

In the general formula (2), R ¹ is a hydrocarbon group, preferably one having 1 to 10 carbon atoms, more preferably 1 to 8 carbon atoms, and particularly preferably 1 to 6 carbon atoms. .. Specific examples of R ¹ include a methyl group, an ethyl group, a propyl group, a butyl group, an isobutyl group, a hexyl group, an octyl group, and the like. Of these, a methyl group, an ethyl group and an isobutyl group are most preferable.
In the general formula (2), X is a halogen atom or a hydrogen atom. Examples of the halogen atom that can be used as X include fluorine, chlorine, bromine, and iodine. Of these, chlorine is particularly preferable.
In the general formula (2), R ² is a hydrocarbon group or a cross-linking group with Al. When R ² is a hydrocarbon group, R ² can be selected from the same group as in the example of the hydrocarbon group of R ¹ . Further, as the organoaluminum compound (A4'), almoxane compounds typified by methylarmoxane can also be used, in which case R ² represents a cross-linking group by Al.

Examples of the organic aluminum compound (A4') include trimethylaluminum, triethylaluminum, triisobutylaluminum, trioctylaluminum, diethylaluminum chloride, ethylaluminum chloride, diethylaluminum ethoxide, methylalmoxane, and the like. Of these, triethylaluminum and triisobutylaluminum are preferable.
The organoaluminum compound (A4') can be used not only alone but also in combination with a plurality of compounds.

The amount of the organoaluminum compound (A4') used may be arbitrary as long as the effects of the present invention are not impaired, but in general, it is preferably within the following range.
The amount of the organoaluminum compound (A4') used is a molar ratio (number of moles of aluminum atoms / number of moles of titanium atoms) to the titanium component constituting the component (A1'), preferably in the range of 0.1 to 100. It is more preferably in the range of 1 to 50.

The organoaluminum compound (A4') used in the present invention is used for the purpose of efficiently supporting the alkoxysilane compound (A3') in the contact product. Therefore, it is distinguished from the organoaluminum compound (B), which will be described later, which is used as a co-catalyst during the main polymerization, because the purpose of use is different.

(5) Compound having at least two ether bonds (A5')
In the present invention, an arbitrary component such as a compound (A5') having at least two ether bonds may be brought into contact with the component (A1') by any method.
As the compound (A5') having at least two ether bonds that can be used in the present invention, the compounds disclosed in JP-A-3-294302 and JP-A-8-333413 can be used. In general, it is preferable to use a compound represented by the following general formula (3).
R ⁸ OC (R ⁷ ) _2- C (R ⁶ ) _2- C (R ⁷ ) _2- OR ⁸ ... (3)
(In the formula, R ⁶ and R ⁷ are selected from a hydrogen atom, a hydrocarbon group or a hetero atom-containing hydrocarbon group. R ⁸ represents a hydrocarbon group or a hetero atom-containing hydrocarbon group.)

In the general formula (3), R ⁶ is selected from a hydrogen atom, a hydrocarbon group, or a hetero atom-containing hydrocarbon group.
The hydrocarbon group that can be used as R ⁶ is generally one having 1 to 20 carbon atoms, preferably 1 to 10 carbon atoms. Specific examples of the hydrocarbon group that can be used as R ⁶ include a linear aliphatic hydrocarbon group represented by an n-propyl group, a branched form represented by an i-propyl group and a t-butyl group. Examples thereof include an aliphatic hydrocarbon group, an alicyclic hydrocarbon group typified by a cyclopentyl group and a cyclohexyl group, and an aromatic hydrocarbon group typified by a phenyl group. More preferably, it is preferable to use a branched aliphatic hydrocarbon group or an alicyclic hydrocarbon group as R ^6, among others, i- propyl, i- butyl, i- pentyl group, a cyclopentyl group, a cyclohexyl group, It is preferable to use.
The two R ⁶ may form one or more rings bonded to. At this time, a cyclopolyene-based structure containing two or three unsaturated bonds in the ring structure can also be adopted. Further, it may be condensed with another cyclic structure. Regardless of whether it is monocyclic, dicyclic, or condensed, it may have one or more hydrocarbon groups on the ring as substituents. Substituents on the ring are generally those having 1 to 20 carbon atoms, preferably 1 to 10 carbon atoms. Specific examples include a linear aliphatic hydrocarbon group represented by an n-propyl group, a branched aliphatic hydrocarbon group represented by an i-propyl group and a t-butyl group, a cyclopentyl group and a cyclohexyl group. Examples thereof include an alicyclic hydrocarbon group typified by, an aromatic hydrocarbon group typified by a phenyl group, and the like.

In the general formula (3), R ⁷ is selected from a hydrogen atom, a hydrocarbon group or a hetero atom-containing hydrocarbon group. Specifically, R ⁷ can be selected from the examples of R ⁶ . Hydrogen is preferred.
In the general formula (3), R ⁸ represents a hydrocarbon group or a heteroatom-containing hydrocarbon group. Specifically, R ⁸ can be selected from the examples in the case where R ⁶ is a hydrocarbon group. It is preferably a hydrocarbon group having 1 to 6 carbon atoms, and more preferably an alkyl group. Most preferably it is a methyl group.
When R ^{6 to} R ⁸ are heteroatom-containing hydrocarbon groups, the heteroatom is preferably selected from nitrogen, oxygen, sulfur, phosphorus and silicon. Further, regardless of whether R ^{6 to} R ⁸ are hydrocarbon groups or heteroatom-containing hydrocarbon groups, halogens may be optionally contained. When R ^{6 to} R ⁸ contain heteroatoms and / or halogens, the skeletal structure thereof is preferably selected from the examples of hydrocarbon groups. Further, R ^{6 to} R ⁸ may be the same as or different from each other.

Preferred examples of the compound (A5') having at least two ether bonds that can be used in the present invention are 2,2-diisopropyl-1,3-dimethoxypropane and 2,2-diisobutyl-1,3-dimethoxypropane. , 2,2-Diisobutyl-1,3-diethoxypropane, 2-isobutyl-2-isopropyl-1,3-dimethoxypropane, 2-isopropyl-2-isopentyl-1,3-dimethoxypropane, 2,2-di Cyclopentyl-1,3-dimethoxypropane, 2,2-dicyclohexyl-1,3-dimethoxypropane, 2-isopropyl-1,3-dimethoxypropane, 2-tert-butyl-1,3-dimethoxypropane, 2,2- Dipropyl-1,3-dimethoxypropane, 2-methyl-2-phenyl-1,3-dimethoxypropane, 9,9-bis (methoxymethyl) fluorene, 9,9-bis (methoxymethyl) -1,8-dichloro Fluolene, 9,9-bis (methoxymethyl) -2,7-dicyclopentylfluorene, 9,9-bis (methoxymethyl) -1,2,3,4-tetrahydrofluorene, 1,1-bis (1'-) Butoxyethyl) cyclopentadiene, 1,1-bis (α-methoxybenzyl) inden, 1,1-bis (phenoxymethyl) -3,6-dicyclohexylinden, 1,1-bis (methoxymethyl) benzonaphthene, 7, 7-Bis (methoxymethyl) -2,5-novornadinene, etc. can be mentioned. Among them, 2,2-diisopropyl-1,3-dimethoxypropane, 2,2-diisobutyl-1,3-dimethoxypropane, 2-isobutyl-2-isopropyl-1,3-dimethoxypropane, 2-isopropyl-2-isopentyl Particularly preferred are -1,3-dimethoxypropane, 2,2-dicyclopentyl-1,3-dimethoxypropane and 9,9-bis (methoxymethyl) fluorene.
The compound having at least two ether bonds (A5') can be used alone or in combination of a plurality of compounds.
Further, the compound (A5') having at least two ether bonds may be the same as or different from the multivalent ether compound used as the electron donating compound (A1d) which is an essential component in the component (A1'). Good.

The amount of the compound (A5') having at least two ether bonds can be arbitrary as long as the effect of the present invention is not impaired, but generally, it is preferably within the following range.
The amount of the compound (A5') having at least two ether bonds used is the molar ratio to the titanium component constituting the component (A1') (the number of moles of the compound (A5') having at least two ether bonds / the number of moles of titanium atoms. The number of moles) is preferably in the range of 0.01 to 10,000, more preferably in the range of 0.5 to 500.

(6) Method for Producing Solid Catalyst Component (A) for α-olefin Polymerization The solid catalyst component (A) for α-olefin polymerization in the present invention (first and second inventions) is first made into the above-mentioned component (A1'). On the other hand, an ethylenically unsaturated hydrocarbon is brought into contact with the product to obtain a prepolymerized product (A1). At this time, other arbitrary components such as compounds (A2') to (A5') may be brought into contact with each other by any method as long as the effects of the present invention are not impaired.

As the contact condition between the component (A1') and each optional component (A2') to (A5'), any condition can be used as long as the effect of the present invention is not impaired. Generally, they are contacted in an inert solvent. The contact is preferably made in the absence of oxygen or the like, and the following conditions are more preferable.
The contact temperature is about −50 to 200 ° C., preferably −10 to 100 ° C., more preferably 0 to 70 ° C., and particularly preferably 10 ° C. to 60 ° C. The contact method is not limited as long as it is contacted in an inert solvent, and examples thereof include a mechanical method using a rotary ball mill or a vibration mill, and a method of contacting by stirring. Preferably, it is preferable to use a method of contacting with stirring in the presence of an inert solvent.

Regarding the contact procedure of the component (A1'), the silane compound having an alkenyl group (A2'), the alkoxysilane compound (A3'), and the organic aluminum compound (A4'), and the compound having at least two ether bonds (A5'). Can use any procedure. Specific examples include the following procedures (i) to (iv), and among these, the procedure (i) and the procedure (ii) are preferable.

Step (i): After contacting the component (A1') with the silane compound (A2') having an alkenyl group, then the alkoxysilane compound (A3'), and then the organic aluminum compound (A4'). , A method of contacting a compound (A5') having at least two ether bonds.
Procedure (ii): After contacting the component (A1') with a silane compound (A2') having an alkenyl group and an alkoxysilane compound (A3'), it has an organic aluminum compound (A4') and at least two ether bonds. A method of contacting compound (A5').
Procedure (iii): The component (A1') is contacted with the alkoxysilane compound (A3'), followed by the alkenyl group-bearing silane compound (A2'), followed by the organic aluminum compound (A4') and at least two. A method of contacting a compound (A5') having an ether bond.
Procedure (iv): A method of contacting all compounds at the same time.
The above shows a mode in which the optional components A2'to A5' are used, but in each mode, a part or all of the optional components A2'to A5' may not be used. However, when A3'is used, it is preferable to use A4', and when A4'is used, it is preferable to use A3'.

Further, with respect to the component (A1'), a silane compound having an alkenyl group (A2'), an alkoxysilane compound (A3'), an organic aluminum compound (A4') and a compound having at least two ether bonds (A5'). Any of the above can be contacted any number of times. At this time, all of the silane compound (A2') having an alkenyl group, the alkoxysilane compound (A3'), the organic aluminum compound (A4'), and the compound having at least two ether bonds (A5') are contacted a plurality of times. The compounds used in the above may be the same or different from each other.
In addition, the preferable range of the amount of each component used is shown above, but this is the amount used for contacting each time, and when used multiple times, the amount used once is within the range of the above-mentioned amount used. As a guide, you may make contact as many times as you like.

(7) Ethylene Unsaturated Hydrocarbon In the method for producing the solid catalyst component (A) for α-olefin polymerization of the present invention (first and second inventions), the component (A1') or the component (A1') is optional. It is an essential requirement that the contact products of the components (A2') to (A5') are brought into contact with an ethylenically unsaturated hydrocarbon to be prepolymerized.
As the ethylenically unsaturated hydrocarbon in the prepolymerization treatment, a compound or the like disclosed in JP-A-2004-124090 can be used. Specific examples of the compound include olefins typified by ethylene, propylene, 1-butene, 3-methyl-1-butene, 4-methyl-1-pentene, styrene, α-methylstyrene, and allylbenzene. , Styrene-like compounds such as chlorostyrene, and 1,3-butadiene, isoprene, 1,3-pentadiene, 1,5-hexadiene, 2,6-octadiene, dicyclopentadiene, 1,3-cyclo. Diene compounds typified by hexadiene, 1,9-decadien, divinylbenzene, and the like can be mentioned. Among them, ethylene, propylene, 3-methyl-1-butene, 4-methyl-1-pentene, styrene, divinylbenzene and the like are particularly preferable.
The ethylenically unsaturated hydrocarbon can be used not only alone but also in combination with a plurality of compounds.

The reaction conditions between the contact product of the component (A1') or the component (A1') and the optional components (A2') to (A5') and the above ethylenically unsaturated hydrocarbon are within the range that does not impair the effect of the present invention. Any condition can be used in. Generally, the following range is preferable.
The prepolymerization amount is preferably in the range of 0.001 to 100 g based on 1 gram of the contact product of the component (A1') or the component (A1') and the optional component (A2') to (A5'). Is in the range of 0.1 to 50 g, more preferably 0.5 to 10 g.
The reaction temperature during prepolymerization is preferably −150 to 150 ° C, more preferably 0 to 100 ° C. The reaction temperature during prepolymerization is preferably lower than the polymerization temperature during main polymerization. The reaction is generally preferably carried out under stirring, and an inert solvent such as hexane or heptane may be present at that time. The prepolymerization may be carried out a plurality of times, and the monomers used at this time may be the same or different.

In the present invention, the prepolymerized contact product (A1) may be washed with an inert solvent. When washing is performed, examples of the inert solvent include hexane and heptane.
Further, in the present invention, the prepolymerized contact product (A1) may be dried.

(8) Silane compound having an alkenyl group (A2)
A silane compound having an alkenyl group exhibits a structure in which at least one hydrogen atom of monosilane (SiH ₄ ) is replaced with an alkenyl group (preferably an alkenyl group having 2 to 10 carbon atoms). The remaining hydrogen atoms remain intact, or some of the hydrogen atoms are halogen (preferably Cl), alkyl groups (preferably hydrocarbon groups with 1-12 carbon atoms), aryl groups (preferably phenyl groups), It shows a structure substituted with an alkoxy group (preferably an alkoxy group having 1 to 12 carbon atoms) or the like.
As the silane compound (A2) having an alkenyl group used in the present invention, the compounds disclosed in JP-A-3-234707, JP-A-2003-292522, and JP-A-2006-169283 are used. Can be done.

More specifically, vinylsilane, methylvinylsilane, dimethylvinylsilane, trimethylvinylsilane, trichlorovinylsilane, dichloromethylvinylsilane, chlorodimethylvinylsilane, chloromethylvinylsilane, triethylvinylsilane, chlorodiethylvinylsilane, dichloroethylvinylsilane, dimethylethylvinylsilane, diethylmethylvinylsilane. , Tripentylvinylsilane, Triphenylvinylsilane, Diphenylmethylvinylsilane, Didimethylphenylvinylsilane, CH ₂ = CH-Si (CH ₃ ) ₂ (C ₆ H ₄ CH ₃ ), (CH ₂ = CH) (CH ₃ ) ₂ Si- O-Si (CH ₃ ) ₂ (CH = CH ₂ ), divinylsilane, dichlorodivinylsilane, dimethyldivinylsilane, diphenyldivinylsilane, allyltrimethylsilane, allyltriethylsilane, allyltrivinylsilane, allylmethyldivinylsilane, allyldimethylvinylsilane , Allylmethyldichlorosilane, allyltrichlorosilane, allyltribromosilane, diallyldimethylsilane, diallyldiethylsilane, diallyldivinylsilane, diallylmethylvinylsilane, diallylmethylchlorosilane, diallyldichlorosilane, diallyldibromosilane, triallylmethylsilane, triallyl Ethylsilane, Triallylvinylsilane, Triallylchlorosilane, Triallylbromosilane, Tetraallylsilane, Di-3-butenyldimethylsilane, Di-3-butenyldiethylsilane, Di-3-butenyldivinylsilane, Di-3- Butenylmethylvinylsilane, di-3-butenylmethylchlorosilane, di-3-butenyldichlorosilane, di-3-butenyldibromosilane, tri-3-butenylmethylsilane, tri-3-butenylethylsilane, Examples thereof include tri-3-butenylvinylsilane, tri-3-butenylchlorosilane, tri-3-butenylbromosilane, tetra-3-butenylsilane, and the like.
Among these, vinylsilane compound and divinylsilane compound are preferable, and trimethylvinylsilane, trichlorovinylsilane, and dimethyldivinylsilane are particularly preferable.
The silane compound (A2) having an alkenyl group can be used alone or in combination with a plurality of compounds.

The amount ratio of the amount of the silane compound (A2) having an alkenyl group to be used may be arbitrary as long as the effect of the present invention is not impaired, but in general, it is preferably within the following range.
The amount of the silane compound (A2) having an alkenyl group to be used is preferably the molar ratio (the number of moles of the silane compound (A2) having an alkenyl group / the number of moles of titanium atoms) to the titanium component constituting the component (A1). It is in the range of 0.001 to 1,000, more preferably in the range of 0.01 to 100.

The silane compound (A2) having an alkenyl group used in the present invention usually has a large steric hindrance as compared with an α-olefin monomer, and cannot be polymerized with a Ziegler catalyst. However, due to the presence of an organic silyl group with a very strong electron donating property, the charge density of the carbon-carbon double bond is very high, and the coordination to the titanium atom, which is the active center, is very high. It is considered to be fast. Therefore, it is considered that the silane compound (A2) having an alkenyl group has an effect of preventing the overreduction of titanium atoms by the organoaluminum compound and the deactivation of active points due to impurities and the like. However, such a mechanism of action is not construed as limiting the technical scope of the present invention.

(9) Aging time In the present invention, it is an essential requirement that the prepolymerization treatment product (A1) is brought into contact with the alkenylsilane (A2) to form an alkenylsilane treatment product, and then allowed to wait for a certain period of time for aging. is there. Upon aging, the alkenylsilane treatment product is converted to the solid catalyst component (A) for α-olefin polymerization. Further, by setting a certain waiting time, the effect of further improving the catalytic activity and hydrogen responsiveness can be obtained.

The mode of the alkenylsilane treatment product during standby is preferably an inert solvent slurry containing the prepolymerization treatment product (A1) and the alkenylsilane (A2). At this time, it is more preferable, but not limited to, to add alkenylsilane (A2) to the prepolymerization treatment product slurry in which only the ethylenically unsaturated compound is removed from the mixture immediately after the completion of the prepolymerization treatment. The prepolymerization treatment product (A1) produced after the completion of the prepolymerization treatment is recovered by an operation such as filtration, washed with an inert solvent, the obtained prepolymerization treatment product (A1) is dried, and then again inert. A solvent may be added to prepare a prepolymerization product slurry, and an alkenylsilane component (A2) may be added thereto.
The concentration of the prepolymerization treatment product (A1) during standby can be arbitrarily set, but is preferably 0.1 g / L or more and 1000 g / L or less, and more preferably 1 g / L or more and 100 g / L or less. .. At this time, the concentration of the prepolymerization treatment product (A1) can be changed while the waiting time has elapsed.

The waiting time is 1 day or more and 180 days or less, preferably 1 day or more and 90 days or less, starting from the point of contact between the prepolymerization treatment product (A1) and the alkenylsilane (A2) (waiting time = 0). More preferably, it is 3 days or more and 90 days or less. If it is too short, the catalyst performance will not be fully brought out, and if it is too long, the performance may deteriorate due to catalyst deterioration.

The aging of the contact product is preferably carried out in an environment where a toxic substance such as molecular oxygen is absent in order to avoid decomposition of the catalyst component, and other aging environmental conditions can be arbitrarily set. The contact product during aging is maintained at an average daily temperature in the range of preferably -100 to 100 ° C, more preferably 0 to 60 ° C. During the standby time, the catalyst slurry may or may not be agitated, or they may be used together. When agitated, it is possible to prevent the catalyst from settling and subsequent aggregation. On the other hand, when not stirred, it is possible to prevent the catalyst particles from collapsing due to stirring and the resulting generation of fine particles in the polymerization reactor. It may or may not be shaded.

2. 2. Catalyst for α-olefin polymerization In the present invention, it is essential to use the above-mentioned solid catalyst component (A) for α-olefin polymerization as the catalyst for α-olefin polymerization, and the organoaluminum compound (B) and / or alkoxy. The silane compound (C) may be contacted as an optional component.

(1) Organoaluminium compound (B)
As the organoaluminum compound (B) that can be used in the present invention, the compound disclosed in JP-A-2004-124090 can be used. Preferably, it can be selected from the same group as in the example in the organoaluminum compound (A4'), which is an optional component when preparing the solid catalyst component (A) for α-olefin polymerization. The organoaluminum compound (B) that can be used as the catalyst component is different even if it is the same as the organoaluminum compound (A4') that can be used when preparing the solid catalyst component (A) for α-olefin polymerization. You may.
The organoaluminum compound (B) can be used not only alone but also in combination with a plurality of compounds.

The amount of the organoaluminum compound (B) used is preferably a molar ratio (the number of moles of the organoaluminum compound (B) / the number of moles of titanium atoms) to the titanium component constituting the solid catalyst component (A) for α-olefin polymerization. Is in the range of 1 to 5,000, more preferably in the range of 10 to 500.

(2) Alkoxysilane compound (C)
As the alkoxysilane compound (C) that can be used in the present invention, the compound disclosed in JP-A-2004-124090 can be used. Preferably, it can be selected from the same group as in the example in the alkoxysilane compound (A3'), which is an optional component when preparing the solid catalyst component (A) for α-olefin polymerization.
Further, the alkoxysilane compound (C) used here is different even if it is the same as the alkoxysilane compound (A3') that can be used when preparing the solid catalyst component (A) for α-olefin polymerization. May be good.

When the alkoxysilane compound (C) is used, the amount used is the molar ratio to the titanium component constituting the solid catalyst component (A) for α-olefin polymerization (the number of moles of the alkoxysilane compound (C) / the number of moles of titanium atoms). It is preferably in the range of 0.01 to 10,000, and more preferably in the range of 0.5 to 500.

(3) Other Optional Components in the Catalyst In the present invention, it is essential to use the solid catalyst component (A) for α-olefin polymerization as the catalyst, but the organoaluminum compound (B) and / or the alkoxysilane compound (C) ) And other optional components can be used, and as long as the effects of the present invention are not impaired, any component such as the compound (D) having at least two ether bonds described below and the other compound (E) should be used. Can be done.

(3-1) Compound (D) having at least two ether bonds
As the compound (D) having at least two ether bonds used as an optional component in the catalyst of the present invention, the compounds disclosed in JP-A-3-294302 and JP-A-8-333413 can be used. .. Preferably, it can be selected from the same group as in the example of the compound (A5') having at least two ether bonds used in the solid catalyst component (A) for α-olefin polymerization. At this time, the compound (D) having at least two ether bonds may be the same as or different from the compound (A5').
As the compound (D) having at least two ether bonds, not only a single compound can be used, but also a plurality of compounds can be used in combination.

When the compound (D) having at least two ether bonds is used, the amount used is the molar ratio to the titanium component constituting the solid catalyst component (A) for α-olefin polymerization (the compound (D) having at least two ether bonds). (Number of moles / number of moles of titanium atom), preferably in the range of 0.01 to 10,000, and more preferably in the range of 0.5 to 500.

(3-2) Other compounds (E)
Examples of the other compound (E) used as an optional component in the catalyst of the present invention include a compound having a C (= O) N bond in the molecule (E) as disclosed in JP-A-2004-124090. ) Can be used. By using these compounds (E), the formation of amorphous components such as CXS can be suppressed. In this case, tetramethylurea, 1,3-dimethyl-2-imidazolidinone, 1-ethyl-2-pyrrolidinone, and the like can be mentioned as preferable examples. Further, an organometallic compound having a metal atom other than Al, such as diethylzinc, can also be used.
When the compound (E) having a C (= O) N bond in the molecule is used, the amount used is the molar ratio to the titanium component constituting the solid catalyst component (A) for α-olefin polymerization (C (= in the molecule). O) The number of moles of the compound (E) having an N bond / the number of moles of titanium atoms), preferably in the range of 0.001 to 1,000, and more preferably in the range of 0.05 to 500. ..

As one of the aspects of the α-olefin polymerization catalyst of the present invention, polymerization containing the above-mentioned solid catalyst component (A) for α-olefin polymerization, organoaluminum compound (B), and alkoxysilane compound (C) as constituent components. Examples include catalysts for use.

3. 3. Polymerization of α-olefins Polymerization of α-olefins using the catalyst for α-olefin polymerization of the present invention can be applied to slurry polymerization using a hydrocarbon solvent, liquid phase no solvent polymerization using substantially no solvent, gas phase polymerization, etc. Applies. As the polymerization solvent in the case of slurry polymerization, a hydrocarbon solvent such as pentane, hexane, heptane, or cyclohexane is used.
In particular, the polymerization of α-olefins using the catalyst for α-olefin polymerization of the present invention is preferably vapor phase polymerization using a horizontal reactor having a stirrer rotating around the horizontal axis inside.
The polymerization method adopted may be any method such as continuous polymerization, batch polymerization or multi-stage polymerization. The polymerization temperature is usually about 30 to 200 ° C., preferably 50 to 150 ° C. Hydrogen can be used as the molecular weight regulator.

(1) Raw Material for α-olefin Monomer The α-olefin polymerized by using the catalyst for α-olefin polymerization of the present invention is represented by the following general formula (4).
R-CH = CH ₂ ... (4)
(In the general formula (4), R is a hydrocarbon group having 1 to 20 carbon atoms and may have a branch.)

Specifically, they are α-olefins such as propylene, 1-butene, 1-pentene, 1-hexene and 4-methyl-1-pentene. In addition to the homopolymerization of these α-olefins, (random) copolymerization with a monomer copolymerizable with the α-olefin (for example, ethylene, α-olefin, dienes, styrenes, etc.) can also be performed. It is also possible to carry out block copolymerization in which the α-olefin is homopolymerized in the first stage and then the α-olefin and the monomer copolymerizable with the α-olefin are randomly copolymerized in the second stage. The monomer copolymerizable with the α-olefin may have a content of 15% by weight or less during random copolymerization in random copolymerization and 50% by weight or less in block copolymerization in block copolymerization. preferable.
Of these, α-olefin homopolymerization and block copolymerization are preferable, and propylene homopolymerization and block copolymerization in which the first stage is propylene homopolymerization are most preferable.

(2) α-olefin polymer The index of the α-olefin polymer polymerized according to the present invention is not particularly limited and can be appropriately adjusted according to various uses.
In general, the MFR of the α-olefin polymer is preferably in the range of 0.01 to 10,000 g / 10 min, more preferably in the range of 0.1 to 1,000 g / 10 min. ..
In addition, the amount of cold xylene-soluble component (CXS), which is an amorphous component of the α-olefin polymer, generally varies in a preferable range depending on the application. For applications where high rigidity is preferred, such as injection molding applications, the amount of CXS is preferably in the range of 0.01 to 3.0% by weight, more preferably 0.05 to 1.5% by weight. It is within the range, more preferably within the range of 0.1 to 1.0% by weight.
Here, the values of MFR and CXS are values measured by the method defined in the following examples.

In addition, the polymer particles of the α-olefin polymer obtained by the present invention exhibit excellent particle properties. Generally, the particle properties of polymer particles are evaluated by polymer bulk density, particle size distribution, particle appearance, and the like.
The polymer bulk density (powder bulk density) of the polymer particles obtained by the present invention is preferably in the range of 0.40 to 0.55 g / ml, more preferably 0.42 to 0.52 g / ml.
Here, the polymer bulk density is a value measured by the method defined in the following examples.

The α-olefin polymer polymerized according to the present invention is produced with high yield, MFR, and polymer density, and also has good particle properties, and can be suitably used for improving productivity and stable production in a plant. ..

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples. The method for measuring each physical property value in the present invention is shown below.

4. Example (1) [Measurement of various physical properties]
(1-1) MFR:
Evaluation was performed using a melt indexer manufactured by Takara Co., Ltd. under the conditions of 230 ° C. and 21.18 N (2.16 kg) based on JIS K6921.
(1-2) Polymer bulk density:
The bulk density of the powder sample was measured using an apparatus conforming to ASTM D1895-69.
(1-3) CXS:
The sample (about 5 g) was once completely dissolved in p-xylene (300 ml) at 140 ° C. After that, the mixture was cooled to 23 ° C. and the polymer was precipitated at 23 ° C. for 12 hours. After the precipitated polymer was filtered off, p-xylene was evaporated from the filtrate. The polymer remaining after evaporation of p-xylene was dried under reduced pressure at 100 ° C. for 2 hours. The dried polymer was weighed to give the CXS value as% by weight of the sample.
(1-4) Density:
Using the extruded strands obtained during the MFR measurement, the measurement was performed by the density gradient tube method in accordance with the JIS K7112 D method.
(1-5) Ti content:
The sample was accurately weighed, hydrolyzed, and then measured using the colorimetric method. For the sample after prepolymerization, the content was calculated using the weight excluding the prepolymerized polymer.
(1-6) Silicon compound content:
The sample was accurately weighed and decomposed with methanol. The concentration of the silicon compound in the obtained methanol solution was determined by comparing with the standard sample using gas chromatography. The content of the silicon compound contained in the sample was calculated from the concentration of the silicon compound in methanol and the weight of the sample. For the sample after prepolymerization, the content was calculated using the weight excluding the prepolymerized polymer.

(2) [Preparation of sample]
[Example 1]
(2-1) Preparation of component (A1') An autoclave having a capacity of 10 L equipped with a stirrer was sufficiently replaced with nitrogen, and 2 L of purified toluene was introduced. To this, at room temperature, 200 g of Mg (OEt) ₂ and 1 L of TiCl ₄ were added. The temperature was raised to 90 ° C. and 50 ml of di-n-butyl phthalate was introduced. Then, the temperature was raised to 110 ° C. and the reaction was carried out for 3 hours. The reaction product was thoroughly washed with purified toluene. Then, purified toluene was introduced to adjust the total liquid volume to 2 L. 1 L of TiCl ₄ was added at room temperature, the temperature was raised to 110 ° C., and the reaction was carried out for 2 hours. The reaction product was thoroughly washed with purified toluene. Then, purified toluene was introduced to adjust the total liquid volume to 2 L. 1 L of TiCl ₄ was added at room temperature, the temperature was raised to 110 ° C., and the reaction was carried out for 2 hours. The reaction product was thoroughly washed with purified toluene. Further, using purified n-heptane, toluene was replaced with n-heptane to obtain a slurry of the component (A1'). A part of this slurry was sampled and dried. As a result of analysis, the Ti content of the component (A1') was 2.7 wt%.

(2-2) Preparation of Solid Catalyst Component (A) for Olefin Polymerization Next, purified n-heptane was introduced, and the liquid level was adjusted so that the concentration of 4 g of the component (A1') was 20 g / L. component (A3 ') as _{(i-Pr) 2 Si (} OMe) 2 and 0.14 mL, component (A4' the n- heptane dilution of _Et 3 Al as) was 1.7g added as _Et 3 Al. Then, the reaction was carried out at 30 ° C. for 2 hours to obtain a slurry containing a contact product.

Prepolymerization was carried out by the following procedure using the slurry containing the contact product obtained above. After cooling the slurry to 10 ° C., 8 g of propylene was supplied over 15 minutes. After the supply of propylene was finished, the reaction was continued for another 10 minutes. Then, the gas phase part was sufficiently replaced with nitrogen. The obtained prepolymerized product (A1) contained 2.24 g of polypropylene per 1 g of solid component.

To the slurry containing the prepolymerization treatment product (A1) obtained above, 1.0 mL of dimethyldivinylsilane as a component (A2) is added, and the slurry is allowed to stand by at room temperature and in a nitrogen atmosphere for 1 day without stirring. As a result, a slurry containing the solid catalyst component (A) for α-olefin polymerization was obtained. The obtained slurry was subjected to the next propylene polymerization without undergoing treatments such as filtration and drying.

(2-3) Polymerization of propylene An autoclave made of stainless steel having an internal volume of 3.0 L and having a stirring and temperature control device is heated and dried under vacuum, cooled to room temperature and replaced with propylene, and then Et ₃ as a component (B). 550 mg of Al, 85.1 mg of (i-Pr) ₂ Si (OME) ₂ as component (C), and 12,000 ml of hydrogen were introduced, and then 750 g of liquid propylene was introduced to bring the internal temperature to 70 ° C. After the combination, 5 mg of the above-mentioned solid catalyst component (A) for α-olefin polymerization was press-fitted to polymerize propylene. After 1 hour, 10 ml of ethanol was press-fitted to terminate the polymerization. The polymer was dried and weighed. The results are shown in Table 1.

[Example 2]
The procedure was exactly the same except that the waiting time of Example 1 was set to 3 days. The results are shown in Table 1.

[Example 3]
The procedure was exactly the same except that the waiting time of Example 1 was set to 9 days. The results are shown in Table 1.

[Example 4]
The procedure was exactly the same except that the waiting time of Example 1 was 72 days. The results are shown in Table 1.

[Comparative Example 1]
The procedure was exactly the same except that the waiting time of Example 1 was set to 0 days. The results are shown in Table 1.

[Comparative Example 2]
After the preparation of the prepolymerization treatment product, the procedure was exactly the same as in Example 1 except that the component (A2) was not added. The results are shown in Table 1.

(3) [Discussion of evaluation results of each example and each comparative example]
As is clear from Table 1, by comparing Examples 1 to 4 and Comparative Examples 1 and 2, it can be seen that the catalytic activity of the catalyst of the present invention is generally superior to that of Comparative Examples.
Specifically, from Examples 1 to 4 and Comparative Example 1, it can be seen that the catalytic activity and hydrogen responsiveness of the catalyst are significantly improved by setting an appropriate waiting time.
Therefore, the catalyst of each example of the present invention is a catalyst having extremely high catalytic activity and hydrogen responsiveness while maintaining basic performance such as stereoregularity at a high level, and is compared with each comparative example. It can be said that excellent results have been obtained.

The α-olefin polymerization catalyst obtained by using the present invention has high catalytic performance such as catalytic activity, hydrogen responsiveness, polymer density, etc., and enhances the productivity of the α-olefin polymer. , The manufacturing cost can be reduced, and it is highly industrially usable.
Further, the α-olefin polymer obtained by using the catalyst of the present invention, particularly polypropylene, is used for injection molding typified by automobile parts and home appliance parts, extrusion molding typified by biaxially stretched film, and span. It can be suitably used for fibers typified by bonds.

Claims (5)

A method for producing a solid catalyst component (A) for α-olefin polymerization.
Including the step of contacting the following components (A1) and (A2) to form a contact product, the contact product is brought into contact with the component (A1) and the component (A2) for the first time for one day. above 180 waiting time within days location Kukoto, the contact product is aged, waiting time, the contact product, characterized in that the daily average temperature is maintained in the range of 0 to 60 ° C. The method for producing the solid catalyst component (A) for α-olefin polymerization.
Component (A1): Prepolymerization treatment product obtained by contacting a solid component (A1') containing titanium, magnesium, halogen and an electron donating compound as essential components with an ethylenically unsaturated hydrocarbon in an inert solvent. Component (A2): Silane compound having an alkenyl group A method for producing a solid catalyst component (A) for α-olefin polymerization.
A step of contacting the following component (A1') with an ethylenically unsaturated hydrocarbon in an inert solvent to produce a prepolymerized product (A1).
The prepolymerization treatment product (A1) and the component (A2) are brought into contact with each other to form a contact product, and the contact product is brought into contact with the component (A1) and the component (A2) for the first time as a starting point. , the waiting time within 180 days or more a day in location Kukoto, the contact product is aged, waiting time, the contact product, the average temperature per day is maintained in the range of 0 to 60 ° C. A method for producing a solid catalyst component (A) for α-olefin polymerization, which comprises the above.
Component (A1'): Solid component containing titanium, magnesium, halogen and electron donating compound as essential components Component (A2): Silane compound having an alkenyl group The contact product, at location Kukoto wait time within 90 days more than 3 days, the contact product is aged and wherein the Rukoto, alpha-olefin polymerization solid catalyst component according to claim 1 or 2 The manufacturing method of (A). The method for producing a solid catalyst component (A) for α-olefin polymerization according to any one of claims 1 to 3, wherein the component (A2) is a vinylsilane compound. The components are the solid catalyst component (A) for α-olefin polymerization, the following component (B), and the following component (C) produced by the production method according to any one of claims 1 to 4. A method for producing an α-olefin polymer, which comprises contacting a polymerization catalyst with an α-olefin to polymerize it.
Component (B): Organoaluminium compound Component (C): Alkoxysilane compound [However, it is different from the silane compound having an alkenyl group. ]

Images