JP4540056B2 - Solid catalyst component and catalyst for olefin polymerization, and method for producing olefin polymer using the same - Google Patents

Description

  The present invention relates to a solid catalyst component and a catalyst for olefin polymerization, which can obtain a polymer having a high stereoregularity while further obtaining an olefin polymer in a high yield, and an olefin weight using the same. The present invention relates to a method for manufacturing coalescence.

  Conventionally, in the polymerization of olefins, solid catalyst components containing magnesium, titanium, an electron donating compound and halogen as essential components are known. Many olefin polymerization methods have been proposed in which propylene is polymerized or copolymerized in the presence of an olefin polymerization catalyst comprising the solid catalyst component, an organoaluminum compound, and an organosilicon compound. For example, Patent Document 1 (JP 57-63310 A) and Patent Document 2 (JP 57-63311 A) contain an electron donor of a magnesium compound, a titanium compound, and an organic dicarboxylic acid ester compound. A method of polymerizing an olefin having 3 or more carbon atoms using a catalyst comprising a combination of a solid catalyst component, an organoaluminum compound and an organosilicon compound having a Si—O—C bond is disclosed.

Patent Document 3 (Japanese Patent Laid-Open No. 1-6006) discloses a solid catalyst component for olefin polymerization containing dialkoxymagnesium, titanium tetrachloride, and dibutyl phthalate, and in the presence of this solid catalyst component. By polymerizing propylene, a stereoregular polymer is obtained in a high yield, which is effective to some extent. By the way, recently, polymers having various physical properties have been demanded, and after using a multistage polymerization apparatus, firstly propylene is polymerized to obtain polypropylene, a copolymer composed of ethylene and propylene is produced in another reactor, The polymerization time has been prolonged, such as obtaining block copolymers, and producing wide molecular weight distribution polymers by producing polymers having different molecular weights in the former and latter stages. In the polymerization reaction, as the polymerization time elapses, the reduction of the titanium component, which is the active point of the solid catalyst component, by organoaluminum proceeds and the polymerization activity is lost. Due to such deactivation of the catalyst, there was a problem that in the latter half of the polymerization, the activity was lowered and the productivity was lowered, or a polymer having desired characteristics could not be obtained. In order to solve such a problem, Patent Document 4 (Japanese Patent Laid-Open No. 2003-292522) discloses that the activity sustainability is improved by using a vinylsilane compound during polymerization. However, although such a method improves the activity persistence, it has disadvantages that the stereoregularity of the polymer is lowered and the final polymer yield is low.
JP 57-63310 A JP-A-57-63311 Japanese Patent Laid-Open No. 1-6006 JP 2003-292522 A

  Accordingly, it is an object of the present invention to provide a solid catalyst component and a catalyst for olefin polymerization which can obtain a polymer having a high stereoregularity and a sustained activity while obtaining an olefin polymer in a high yield. It is in.

  In such a situation, the present inventor has intensively studied to solve the problems remaining in the prior art, and as a result, includes magnesium, titanium, halogen atoms and two or more electron donors, and has a specific composition and characteristics. Solid catalyst component having high activity when subjected to olefin polymerization, especially when subjected to propylene polymerization, to obtain a propylene polymer while maintaining high stereoregularity and high yield for a long time As a result, the present invention has been completed.

That is, the present invention essentially comprises magnesium, titanium, halogen, and one or more electron donors selected from malonic acid diester derivatives, succinic acid diester derivatives, and maleic acid diester derivatives , and further includes diethyl phthalate or its derivatives. An electron donor (c1) and one or more electron donors (c2) selected from phthalic acid diesters and derivatives thereof excluding diethyl phthalate and derivatives thereof, and the electron donation of the component (c1) It provides a solid catalyst component for olefin polymerization, characterized in that the body is 30 to 80% by weight of the total electron donor.

The present invention also provides: (A) the catalyst component for olefin polymerization, (B) the following general formula (1); R ¹ _p AlQ _3-p (1)
(Wherein R ¹ 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), and (C) An olefin polymerization catalyst characterized by containing an external electron donating compound. The present invention also provides a method for producing an olefin polymer, which is carried out in the presence of the olefin polymerization catalyst.

  The catalyst for olefin polymerization of the present invention provides a solid catalyst component and a catalyst for olefin polymerization that can obtain a polymer having high stereoregularity while further maintaining activity while obtaining an olefin polymer in a high yield. To do.

  The solid catalyst component (A) for olefin polymerization of the present invention (hereinafter sometimes simply referred to as “component (A)”) contains magnesium, titanium, a halogen atom and two or more electron donors, and is a solid. The titanium content in the catalyst component is 1.0% by weight or more, preferably 1.0 to 5.0% by weight, particularly preferably 1.0 to 4.2% by weight. When titanium is less than 1% by weight, when an olefin is polymerized by forming a catalyst with an organoaluminum compound, the reduction by the organoaluminum compound tends to proceed and the polymerization activity decreases.

  Among the two or more kinds of electron donors contained in the solid catalyst component, at least one of them contains a substance in which 20 to 60 mol%, preferably 20 to 55% is extracted when contacted with triethylaluminum ( Hereinafter referred to as “low extractable electron donor”). In addition, at least the other one contains more than 60%, preferably more than 65% (hereinafter sometimes referred to as “highly extractable electron donor”). When the extraction ratio of the electron donor exceeds 60%, when used for the polymerization of olefins, the titanium component in the solid catalyst component is rapidly reduced, and the polymerization activity is developed early. However, the reduction proceeds further with time, and the polymerization activity is lost. On the other hand, if the extraction rate is 60% or less, the progress of the reduction is slow and the polymerization activity is sustained. However, when the extraction rate is less than 20%, the titanium component that acts on the activity of olefin polymerization among the titanium components in the solid catalyst component decreases, and the polymerization activity decreases. Among two or more kinds of electron donors, it is preferable to include diethyl phthalate or a derivative thereof in order to increase the stereoregularity of polypropylene.

  Among the electron donors, the ratio of the low extractability electron donor to the total electron donors when contacted with triethylaluminum is 30 to 80% by weight, more preferably 40 to 80% by weight, preferably 45 to 45%. It is particularly desirable to be 75% by weight. When the ratio of the low extractable electron donor is less than 30% by weight, most of the active sites generated by reducing the highly extractable electron donor occupy and the polymerization activity is exhibited early, but the activity persistence is not exhibited. On the other hand, if it exceeds 80% by weight, the number of active sites decreases and the polymerization activity decreases.

  As a method for measuring the content of the electron donor in the solid catalyst component, a known method can be applied. For example, a suspension is obtained by adding the solid catalyst component to a mixed solution of hydrochloric acid and toluene under an inert atmosphere, After the suspension is sufficiently stirred, the toluene solution portion is separated, washed with water, and then the electron donor contained in the toluene portion is quantified by gas chromatography.

  Examples of the contact between the solid catalyst component and triethylaluminum include a method in which 3 g of solid catalyst and 6.4 g of triethylaluminum are added to 100 ml of heptane under an inert atmosphere at room temperature, and stirred for 30 minutes. After contacting the solid catalyst component with triethylaluminum, the solid and liquid are separated using a glass filter, the resulting solid is thoroughly washed with heptane, dried, and the content of the electron donor in the dried product is measured. The extraction rate may be determined by the ratio between the remaining amount after 30 minutes and the content before the extraction test.

  Further, the magnesium in the solid catalyst component is usually 10 to 30% by weight, the electron donor is 1.0 to 20% by weight, and the halogen atom is 45 to 70% by weight.

  The solid catalyst component (A) of the present invention can be obtained by contacting a magnesium compound, a titanium halide compound and an electron donor. Magnesium compounds (hereinafter sometimes simply referred to as “component (a)”) used for the preparation of the solid catalyst component include dihalogenated magnesium, dialkylmagnesium, halogenated alkylmagnesium, dialkoxymagnesium, diaryloxymagnesium, and halogenated compounds. Examples include alkoxy magnesium and fatty acid magnesium.

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

The dialkyl magnesium is preferably a compound represented by the general formula R ⁴ R ⁵ Mg (wherein R ⁴ and R ⁵ represent an alkyl group having 1 to 10 carbon atoms and may be the same or different). 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 can be mentioned. These dialkyl magnesiums can be obtained by reacting magnesium metal with a halogenated hydrocarbon compound or an alcohol.

The halogenated alkylmagnesium is preferably a compound represented by the general formula R ⁶ MgD ¹ (wherein R ⁶ represents an alkyl group having 1 to 10 carbon atoms and D ¹ represents a halogen atom). Specific examples include ethyl magnesium chloride, propyl magnesium chloride, butyl magnesium chloride and the like. These magnesium halides can be obtained by reacting magnesium metal with a halogenated hydrocarbon.

The dialkoxymagnesium or diaryloxymagnesium has the general formula Mg (OR ⁷ ) (OR ⁸ ) (wherein R ⁷ and R ⁸ represent an alkyl group having 1 to 10 carbon atoms or an aryl group, and may be the same or different. And more specifically, dimethoxy magnesium, diethoxy magnesium, dipropoxy magnesium, dibutoxy magnesium, diphenoxy magnesium, ethoxymethoxy magnesium, ethoxypropoxy magnesium, butoxyethoxy magnesium, and the like. Is mentioned. 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.

The halogenated alkoxymagnesium is preferably a compound represented by the general formula Mg (OR ⁹ ) D ² (wherein R ⁹ represents an alkyl group having 1 to 10 carbon atoms, and D ² represents a halogen atom). Specific examples include methoxy magnesium chloride, ethoxy magnesium chloride, propoxy magnesium chloride, butoxy magnesium chloride and the like.

The fatty acid magnesium is preferably a compound represented by the general formula Mg (R ¹⁰ COO) ₂ (wherein R ¹⁰ represents a hydrocarbon group having 1 to 20 carbon atoms), and more specifically, lauric acid. Examples thereof include magnesium, magnesium stearate, magnesium octoate, and magnesium decanoate.

  Among these magnesium compounds in the present invention, dialkoxymagnesium is preferable, and among them, diethoxymagnesium and dipropoxymagnesium are particularly preferably used. Moreover, said magnesium compound can also be used individually by 1 type or in combination of 2 or more types.

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

  The spherical dialkoxymagnesium does not necessarily need to be spherical, and an elliptical or potato-shaped one is used. Specifically, the particle shape 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, more preferably 1 to 1.5. is there. Such spherical dialkoxymagnesium production methods are disclosed in, for example, JP-A-58-41832, JP-A-62-51633, JP-A-3-74341, JP-A-4-368391, and JP-A-8-73388. Etc.

  The average particle size of the dialkoxymagnesium is usually 1 to 200 μm, preferably 5 to 150 μm. In the case of spherical dialkoxymagnesium, the average particle size is usually 1 to 100 μm, preferably 5 to 50 μm, and more preferably 10 to 40 μm. As for the particle size, it is desirable to use one having a small particle size distribution and a small amount of fine powder and coarse powder. Specifically, the particle size of 5 μm or less is 20% or less, preferably 10% or less. On the other hand, the particle size of 100 μm or more is 10% or less, preferably 5% or less. Furthermore, when the particle size distribution is expressed by ln (D90 / D10), it is 3 or less, preferably 2 or less. Here, D90 is the particle size at 90% of the integrated particle size, and D10 is the particle size at 10% of the integrated particle size.

Examples of the titanium halide compound used for the preparation of the solid catalyst component (A) for olefin polymerization of the present invention (hereinafter sometimes simply referred to as “component (b)”) include a tetrahalogenated titanium compound or an alkoxytitanium. Halides are used. Examples of the titanium halide compound include titanium tetrachloride, titanium tetrabromide, and titanium tetraiodide. Preferably, titanium tetrachloride is used, but a titanium halide compound other than titanium tetrachloride can be used in combination therewith. As this halogenated titanium compound, the general formula Ti (OR ¹¹ ) _n Cl _4-n (wherein R ¹¹ represents an alkyl group having 1 to 4 carbon atoms, and n is an integer of 1 ≦ n ≦ 3). The alkoxy titanium chloride represented by this is illustrated. Moreover, said titanium halide compound can also be used individually or in combination of 2 or more types. Specifically, Ti (OCH ₃ ) Cl ₃ , Ti (OC ₂ H ₅ ) Cl ₃ , Ti (OC ₃ H ₇ ) Cl ₃ , Ti (On-C 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-n-C 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 (On-C ₄ H ₉ ) ₃ Cl and the like are exemplified.

  In addition, in the preparation of the solid catalyst component (A) for olefin polymerization in the present invention, a halogenated silane compound or an organic acid halide can be used in combination with the halogenated titanium compound. Examples of the halogenated silane compound include silicon tetrachloride, silicon tetrabromide, and silicon tetraiodide. Silicon tetrachloride is preferably used, but halogenated silane compounds other than silicon tetrachloride can be used in combination therewith. Organic acid halides include benzoyl chloride, benzoic acid chloride, formic acid chloride, acetic acid chloride, propionic acid chloride, phthalic acid dichloride, isophthalic acid dichloride, terephthalic acid dichloride, malonic acid dichloride, succinic acid dichloride, maleic acid dichloride, fumaric acid dichloride, Glutaric acid dichloride, benzoyl bromide, benzoic acid bromide, formic acid bromide, acetic acid bromide, propionic acid bromide, phthalic acid dibromide, isophthalic acid dibromide, terephthalic acid dibromide, malonic acid dibromide, succinic acid dibromide, maleic acid dibromide , Fumaric acid dibromide, glutaric acid dibromide, benzoyl iodide, benzoic acid iodide, formic acid iodide, acetic acid eye Iodide, iodide propionic acid, diiodide phthalic acid, diiodide isophthalic acid, diiodide terephthalic acid, diiodide malonic acid, diiodide succinic acid, diiodide maleic acid, diiodide fumaric acid, diiodide glutaric acid and the like. Preferred examples include benzoyl chloride, benzoic acid chloride, phthalic acid dichloride, malonic acid dichloride, succinic acid dichloride, and maleic acid dichloride, and one or more of them can be used in combination. Moreover, you may use together a halogenated silane compound and an organic acid halide.

  The electron donor used in the present invention may be added when the solid catalyst component (A) is prepared, or the electron donor is added when the precursor of the electron donor is added to prepare the solid catalyst component. It may be generated. As a method of generating from an electron donor precursor, for example, an carboxylic acid anhydride and an alcohol are added as an electron donor precursor, and the alkoxy ester of the carboxylic acid is generated when preparing a solid catalyst component. Can be made. Further, when preparing the solid catalyst component, the alkoxy group of the carboxylic acid alkoxy ester can be exchanged with a different alkoxy group to produce a carboxylic acid alkoxy ester different from the added carboxylic acid alkoxy ester.

  Two or more kinds of electron donors contained in the solid catalyst component (A) for olefin polymerization in the present invention and an electron donor used for the preparation of the solid catalyst component (A) (hereinafter simply referred to as “component (c)”) The electron donor extracted from 20 to 60 mol% when contacted with triethylaluminum (hereinafter sometimes simply referred to as “component (c1)”) is diethyl phthalate or a derivative thereof, malonic acid One or more selected from diester derivatives, succinic acid diester derivatives and maleic acid diester derivatives are preferable, and an electron donor (hereinafter simply referred to as “component”) in which an amount exceeding 60 mol% is extracted when contacted with triethylaluminum. (C2) ") is a phthalic acid diester excluding diethyl phthalate and its derivatives and its One or two or more species selected from the conductor is preferred.

  The derivatives of dicarboxylic acid diesters such as malonic acid diester derivatives, succinic acid diester derivatives and maleic acid diester derivatives are not particularly limited, but one or two hydrocarbon groups to which two alkoxycarbonyl groups of the carboxylic acid diester are bonded. The thing by which the hydrogen atom was substituted by the alkyl group or the cycloalkyl group is mentioned. Among these, those in which the two hydrogen atoms are substituted with two identical or different hydrocarbon groups selected from an alkyl group and a cycloalkyl group are preferred, and the total number of carbon atoms of the two hydrocarbon groups is It is particularly preferably 4 or more, preferably 4 to 20, particularly preferably 4 to 10.

  Further, the derivative of diethyl phthalate and the derivative of phthalic diester are not particularly limited, but one hydrogen atom of the benzene ring to which two alkoxycarbonyl groups of diethyl phthalate or phthalic diester are bonded is an alkyl group and Examples thereof include those substituted with one group selected from halogen atoms. As the alkyl group, those having 1 to 7 carbon atoms, preferably 1 to 4 carbon atoms, are particularly preferable because they give a highly active and highly stereoregular catalyst.

  Specific examples of the malonic acid diester derivative as component (c1) include propylmalonic acid, isopropylmalonic acid, butylmalonic acid, isobutylmalonic acid, sec-butylmalonic acid, tert-butylmalonic acid, pentylmalonic acid, isopentyl. Malonic acid, neopentylmalonic acid, hexylmalonic acid, isohexylmalonic acid, cyclopentylmalonic acid, cyclohexylmalonic acid, dimethylmalonic acid, diethylmalonic acid, dipropylmalonic acid, diisopropylmalonic acid, dibutylmalonic acid, diisobutylmalonic acid, Di-sec-butylmalonic acid, di-tert-butylmalonic acid, dipentylmalonic acid, diisopentylmalonic acid, dineopentylmalonic acid, dihexylmalonic acid, diisohexylmalonic acid, dicyclopentylmalonic acid, dicyclohexyl Malonic acid, methylethylmalonic acid, methylpropylmalonic acid, methylbutylmalonic acid, methylisobutylmalonic acid, methylcyclopentylmalonic acid, methylcyclohexylmalonic acid, ethylpropylmalonic acid, ethylbutylmalonic acid, ethylisobutylmalonic acid, ethylcyclopentyl Malonic acid, ethylcyclohexylmalonic acid, propylbutylmalonic acid, propylisobutylmalonic acid, propylcyclopentylmalonic acid, propylcyclohexylmalonic acid, butylisobutylmalonic acid, butylcyclopentylmalonic acid, butylcyclohexylmalonic acid, isobutylcyclopentylmalonic acid, isobutylcyclohexyl Malonic acid, cyclopentylcyclohexylmalonic acid diethyl ester, dipropyl ester, dibutyl ester, dii Butyl ester. Among the above, diethyl diethyl malonate, diethyl dipropyl malonate, diethyl diisopropyl malonate, diethyl dibutyl malonate, diethyl diisobutyl malonate, diethyl di-tert-butyl malonate, dibutyl diethyl malonate, dibutyl dipropyl malonate, Diisopropylmalonate dibutyl, dibutylmalonate dibutyl, diisobutylmalonate dibutyl, di-tert-butylmalonate dibutyl, and methylcyclopentylmalonic acid are preferred.

  Specific examples of the succinic acid diester derivative as component (c1) include alkyl succinic acid diesters such as propyl succinic acid, isopropyl succinic acid, butyl succinic acid, isobutyl succinic acid, sec-butyl succinic acid, tert-butyl succinic acid, pentyl succinic acid And diethyl ester such as neopentyl succinic acid, dipropyl ester, dibutyl ester and the like. Examples of the dialkyl succinic acid diester include 2,3-dimethyl succinic acid, 2,3-diethyl succinic acid, and 2,3-dipropyl. Succinic acid, 2,3-diisopropyl succinic acid, 2,3-dibutyl succinic acid, 2,3-diisobutyl succinic acid, 2,3-di-sec-butyl succinic acid, 2,3-di-tert-butyl succinic acid, 2 , 3-Dipentylsuccinic acid, 2,3-dineopentylsuccinic acid 2-methyl-3-ethyl succinic acid, 2-methyl-3-propyl succinic acid, 2-methyl-3-isopropyl succinic acid, 2-methyl-3-butyl succinic acid, 2-methyl-3-isobutyl succinic acid, 2 -Methyl-3-tert-butyl succinic acid, 2-methyl-3-pentyl succinic acid, 2-methyl-3-neopentyl succinic acid, 2-ethyl-3-propyl succinic acid, 2-ethyl-3-isopropyl succinic acid Diethyl 2-ethyl-3-butylsuccinate, 2-ethyl-3-isobutylsuccinic acid, 2-ethyl-3-tert-butylsuccinic acid, 2-ethyl-3-pentylsuccinic acid, 2-ethyl-3-neopentyl Succinic acid, 2-ethyl-3-propyl succinic acid, 2-ethyl-3-isopropyl succinic acid, 2-ethyl-3-butyl succinic acid, 2-ethyl 3-isobutyl succinic acid, 2-ethyl-3-tert-butyl succinic acid, 2-ethyl-3-pentyl succinic acid, 2-ethyl-3-neopentyl succinic acid, 2-ethyl-3-propyl succinic acid, 2- Ethyl-3-isopropylsuccinic acid, 2-ethyl-3-butylsuccinic acid, 2-ethyl-3-isobutylsuccinic acid, 2-ethyl-3-tert-butylsuccinic acid, 2-ethyl-3-pentylsuccinic acid, 2- Examples include diethyl esters such as ethyl-3-neopentyl succinic acid, dipropyl esters, dibutyl esters, and diisobutyl esters. Cycloalkyl succinic acid diesters include cyclopentyl succinic acid, cyclohexyl succinic acid, 2,3-dicyclopentyl succinic acid, 2,3-dicyclohexyl succinic acid, 2-methyl-3-cyclopentyl succinic acid, 2-methyl-3-cyclohexyl. Examples include diethyl esters such as succinic acid, 2-ethyl-3-cyclopentyl succinic acid, and 2-ethyl-3-cyclohexyl succinic acid, dipropyl esters, and dibutyl esters. Among the above, diethyl 2,3-diethyl succinate, diethyl 2,3-dipropyl succinate, diethyl 2,3-diisopropyl succinate, diethyl 2,3-dibutyl succinate, diethyl 2,3-diisobutyl succinate, Diethyl 2,3-di-tert-butyl succinate, dibutyl 2,3-diethyl succinate, dibutyl 2,3-dipropyl succinate, dibutyl 2,3-diisopropyl succinate, dibutyl 2,3-dibutyl succinate, 2 1,3-diisobutyl succinate, 2,3-di-tert-butyl succinate dibutyl and the like are preferable.

  Specific examples of maleic diester derivatives as component (c1) include alkyl maleic diesters such as propyl maleic acid, isopropyl maleic acid, butyl maleic acid, isobutyl maleic acid, sec-butyl maleic acid, tert-butyl maleic acid, Examples thereof include diethyl esters such as pentylmaleic acid and neopentylmaleic acid, dipropyl esters, and dibutyl esters. Dialkylmaleic acid diesters include 2,3-dimethylmaleic acid, 2,3-diethylmaleic acid, 2, 3 -Dipropylmaleic acid, 2,3-diisopropylmaleic acid, 2,3-dibutylmaleic acid, 2,3-diisobutylmaleic acid, 2,3-di-sec-butylmaleic acid, 2,3-di-tert- Butyl maleic acid, 2,3-dipentyl Rain acid, 2,3-dineopentyl maleic acid, 2-methyl-3-ethyl maleic acid, 2-methyl-3-propyl maleic acid, 2-methyl-3-isopropyl maleic acid, 2-methyl-3-butyl Maleic acid, 2-methyl-3-isobutylmaleic acid, 2-methyl-3-tert-butylmaleic acid, 2-methyl-3-pentylmaleic acid, 2-methyl-3-neopentylmaleic acid, 2-ethyl- 3-propylmaleic acid, 2-ethyl-3-isopropylmaleic acid, diethyl 2-ethyl-3-butylmaleate, 2-ethyl-3-isobutylmaleic acid, 2-ethyl-3-tert-butylmaleic acid, 2 -Ethyl-3-pentylmaleic acid, 2-ethyl-3-neopentylmaleic acid, 2-ethyl-3-propylmaleic acid, 2-ethyl Ru-3-isopropylmaleic acid, 2-ethyl-3-butylmaleic acid, 2-ethyl-3-isobutylmaleic acid, 2-ethyl-3-tert-butylmaleic acid, 2-ethyl-3-pentylmaleic acid, 2-ethyl-3-neopentylmaleic acid, 2-ethyl-3-propylmaleic acid, 2-ethyl-3-isopropylmaleic acid, 2-ethyl-3-butylmaleic acid, 2-ethyl-3-isobutylmaleic acid Di, 2-ethyl-3-tert-butylmaleic acid, 2-ethyl-3-pentylmaleic acid, 2-ethyl-3-neopentylmaleic acid, etc. diethyl ester, dipropyl ester, dibutyl ester, diisobutyl ester, etc. Can be mentioned. Cycloalkylmaleic acid diesters include cyclopentylmaleic acid, cyclohexylmaleic acid, 2,3-dicyclopentylmaleic acid, 2,3-dicyclohexylmaleic acid, 2-methyl-3-cyclopentylmaleic acid, 2-methyl-3-cyclohexyl. Examples thereof include diethyl esters such as maleic acid, 2-ethyl-3-cyclopentylmaleic acid, and 2-ethyl-3-cyclohexylmaleic acid, dipropyl esters, and dibutyl esters. Among the above, diethyl 2,3-diethyl maleate, diethyl 2,3-dipropyl maleate, diethyl 2,3-diisopropyl maleate, diethyl 2,3-dibutyl maleate, diethyl 2,3-diisobutyl maleate, 2,3-di-tert-butyl maleate diethyl, 2,3-diethyl maleate dibutyl, 2,3-dipropyl maleate dibutyl, 2,3-diisopropyl maleate dibutyl, 2,3-dibutyl maleate dibutyl, Dibutyl 2,3-diisobutylmaleate, dibutyl 2,3-di-tert-butylmaleate and the like are preferable.

  Specific examples of the component (c1) diethyl phthalate and derivatives thereof include diethyl phthalate, diethyl 4-methylphthalate, diethyl 4-isobutylphthalate, diethyl 4-tert-butylphthalate, diethyl 4-fluorophthalate, Examples include diethyl 4-chlorophthalate, diethyl 4-bromophthalate, and diethyl 4-iodophthalate. Of these, diethyl phthalate, diethyl 4-methylphthalate, diethyl 4-tert-butylphthalate, diethyl 4-chlorophthalate, and diethyl 4-bromophthalate are particularly preferable. Moreover, the said component (c1) can be used individually or in combination of 2 or more types.

  Specific examples of the phthalic acid diester excluding the component (c2) diethyl phthalate and its derivatives include dipropyl phthalate, diisopropyl phthalate, dibutyl phthalate, diisobutyl phthalate, dipentyl phthalate, diisopentyl phthalate, and dineopentyl phthalate , Dihexyl phthalate, diisohexyl phthalate, diheptyl phthalate, diisoheptyl phthalate, dioctyl phthalate, diisooctyl phthalate, dinonyl phthalate, diisononyl phthalate, didecyl phthalate, diisodecyl phthalate, ethylpropyl phthalate, ethylisopropyl phthalate , Ethyl butyl phthalate, ethyl isobutyl phthalate, ethyl pentyl phthalate, ethyl isopentyl phthalate, ethyl neopentyl phthalate, ethyl hexyl phthalate, phthalate Ethyl isohexyl, ethyl heptyl phthalate, ethyl isoheptyl phthalate, ethyl octyl phthalate, ethyl isooctyl phthalate, ethyl nonyl phthalate, ethyl isononyl phthalate, ethyl decyl phthalate, ethyl isodecyl phthalate, propyl butyl phthalate Propyl isobutyl phthalate, propyl pentyl phthalate, propyl isopentyl phthalate, propyl neopentyl phthalate, propyl hexyl phthalate, propyl isohexyl phthalate, propyl heptyl phthalate, propyl isoheptyl phthalate, propyl octyl phthalate, Propyl isooctyl phthalate, propyl nonyl phthalate, propyl isononyl phthalate, propyl decyl phthalate, propyl isodecyl phthalate, butyl isobutyl phthalate, phthalic acid Tylpentyl, butyl isopentyl phthalate, butyl neopentyl phthalate, butyl hexyl phthalate, butyl isohexyl phthalate, butyl heptyl phthalate, butyl isoheptyl phthalate, butyl octyl phthalate, butyl isooctyl phthalate, butyl nonyl phthalate Butyl isononyl phthalate, butyl decyl phthalate, butyl isodecyl phthalate, isobutyl pentyl phthalate, isobutyl isopentyl phthalate, isobutyl neopentyl phthalate, isobutyl hexyl phthalate, isobutyl isohexyl phthalate, isobutyl heptyl phthalate, Isobutyl isoheptyl phthalate, isobutyl octyl phthalate, isobutyl isooctyl phthalate, isobutyl nonyl phthalate, isobutyl isononyl phthalate, isobuty phthalate Examples include rudecyl and isobutyl isodecyl phthalate. Among these, dibutyl phthalate, diisobutyl phthalate, dipentyl phthalate, diisopentyl phthalate, dineopentyl phthalate, dihexyl phthalate, diisohexyl phthalate, dioctyl phthalate, and diisooctyl phthalate are particularly preferable.

  Specific examples of the phthalic acid diester derivatives excluding the component (c2) diethyl phthalate and derivatives thereof include 4-methylphthalic acid dipropyl, 4-methylphthalic acid diisopropyl, 4-methylphthalic acid dibutyl, 4-methylphthalic acid diisobutyl, 4- Dipentyl methylphthalate, diisopentyl 4-methylphthalate, dineopentyl 4-methylphthalate, dihexyl 4-methylphthalate, dihexyl 4-methylphthalate, diheptyl 4-methylphthalate, diisoheptyl 4-methylphthalate, dioctyl 4-methylphthalate, 4-methylphthalic acid Diisooctyl, dinonyl 4-methylphthalate, diisononyl 4-methylphthalate, didecyl 4-methylphthalate, diisodecyl 4-methylphthalate, dipropyl 4-isobutylphthalate, 4- Sobutyl phthalate diisopropyl, 4-isobutyl phthalate dibutyl, 4-isobutyl phthalate diisobutyl, 4-isobutyl phthalate dipentyl, 4-isobutyl phthalate diisopentyl, 4-isobutyl phthalate dineopentyl, 4-isobutyl phthalate dihexyl, 4-isobutyl phthalate Acid dihexyl, 4-isobutylphthalate diheptyl, 4-isobutylphthalate diisoheptyl, 4-isobutylphthalate dioctyl, 4-isobutylphthalate diisooctyl, 4-isobutylphthalate dinonyl, 4-isobutylphthalate diisononyl, 4-isobutylphthalic acid Didecyl, 4-isobutyl phthalate diisodecyl, 4-tert-butyl phthalate dipropyl, 4-tert-butyl phthalate diisopropyl, 4-tert-butyl phthalate Dibutyl 4-phosphate, diisobutyl 4-tert-butylphthalate, dipentyl 4-tert-butylphthalate, diisopentyl 4-tert-butylphthalate, dineopentyl 4-tert-butylphthalate, dihexyl 4-tert-butylphthalate, 4-tert-butylphthalic acid Dihexyl, ditert-butyl 4-tert-butylphthalate, diisoheptyl 4-tert-butylphthalate, dioctyl 4-tert-butylphthalate, diisooctyl 4-tert-butylphthalate, dinonyl 4-tert-butylphthalate, diisononyl 4-tert-butylphthalate, 4-tert-butylphthalate didecyl, 4-tert-butylphthalate diisodecyl, 4-fluorophthalate dipropyl, 4-fluorophthalate diisopropyl, 4-fluorophthalate Dibutyl fluorophthalate, diisobutyl 4-fluorophthalate, dipentyl 4-fluorophthalate, diisopentyl 4-fluorophthalate, dineopentyl 4-fluorophthalate, dihexyl 4-fluorophthalate, dihexyl 4-fluorophthalate, 4-fluorophthalate Diheptyl acid, diisoheptyl 4-fluorophthalate, dioctyl 4-fluorophthalate, diisooctyl 4-fluorophthalate, dinonyl 4-fluorophthalate, diisononyl 4-fluorophthalate, didecyl 4-fluorophthalate, 4-fluorophthalic acid Diisodecyl, 4-chlorophthalate dipropyl, 4-chlorophthalate diisopropyl, 4-chlorophthalate dibutyl, 4-chlorophthalate diisobutyl, 4-chlorophthalate dipentyl, 4-chlorophthalate dii Pentyl, dineopentyl 4-chlorophthalate, dihexyl 4-chlorophthalate, dihexyl 4-chlorophthalate, diheptyl 4-chlorophthalate, diisoheptyl 4-chlorophthalate, dioctyl 4-chlorophthalate, diisooctyl 4-chlorophthalate, dinonyl 4-chlorophthalate, 4-chlorophthalate diisononyl, 4-chlorophthalate didecyl, 4-chlorophthalate diisodecyl, 4-bromophthalate dipropyl, 4-bromophthalate diisopropyl, 4-bromophthalate dibutyl, 4-bromophthalate diisobutyl, 4-bromophthalate dipentyl, 4- Diisopentyl bromophthalate, dineopentyl 4-bromophthalate, dihexyl 4-bromophthalate, dihexyl 4-bromophthalate, diheptyl 4-bromophthalate, -Diisoheptyl bromophthalate, dioctyl 4-bromophthalate, diisooctyl 4-bromophthalate, dinonyl 4-bromophthalate, diisononyl 4-bromophthalate, didecyl 4-bromophthalate, diisodecyl 4-bromophthalate, dipropyl 4-iodophthalate, 4-iodophthalate Diisopropyl acid, dibutyl 4-iodophthalate, diisobutyl 4-iodophthalate, dipentyl 4-iodophthalate, diisopentyl 4-iodophthalate, dineopentyl 4-iodophthalate, dihexyl 4-iodophthalate, dihexyl 4-iodophthalate, diheptyl 4-iodophthalate Diisoheptyl 4-iodophthalate, dioctyl 4-iodophthalate, diisooctyl 4-iodophthalate, dinonyl 4-iodophthalate, 4-iodofu Examples include diisononyl tartrate, didecyl 4-iodophthalate, and diisodecyl 4-iodophthalate. Among these, dibutyl 4-methylphthalate, diisobutyl 4-methylphthalate, dipentyl 4-methylphthalate, dineopentyl 4-methylphthalate, dibutyl 4-tert-butylphthalate, diisobutyl 4-tert-butylphthalate, 4-tert-butylphthalic acid Dipentyl, 4-tert-butylphthalene dienepentyl, 4-chlorophthalate diisobutyl, 4-chlorophthalate diisobutyl, 4-chlorophthalate dipentyl, 4-chlorophthalate dineopentyl, 4-bromophthalate dibutyl, 4-bromophthalate diisobutyl, 4-bromophthalate Dipentyl and dineopentyl 4-bromophthalate are preferred. The component (c2) 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, as the electron donor component (c), in addition to (c1) and (c2), an organic compound containing an oxygen atom or a nitrogen atom, for example, an alcohol , Phenols, ethers, esters, ketones, acid halides, aldehydes, amines, amides, nitriles, isocyanates, organosilicon compounds containing Si—O—C bonds, etc. Good

  Specifically, alcohols such as methanol, ethanol, n-propanol and 2-ethylhexanol, phenols such as phenol and cresol, methyl ether, ethyl ether, propyl ether, butyl ether, amyl ether, diphenyl ether, 9,9- Ethers such as bis (methoxymethyl) fluorene and 2-isopropyl-2-isopentyl-1,3-dimethoxypropane, methyl formate, ethyl acetate, vinyl acetate, propyl acetate, octyl acetate, cyclohexyl acetate, ethyl propionate, ethyl butyrate , Methyl benzoate, ethyl benzoate, propyl benzoate, butyl benzoate, octyl benzoate, cyclohexyl benzoate, phenyl benzoate, methyl p-toluate, ethyl p-toluate, methyl anisate, anisic acid Monocarboxylic esters such as chill, dimethyl adipate, diethyl adipate, dipropyl adipate, dibutyl adipate, diisodecyl adipate, dioctyl adipate, acetone, methyl ethyl ketone, methyl butyl ketone, acetophenone, benzophenone Ketones such as phthalic acid dichloride, acid halides such as terephthalic acid dichloride, aldehydes such as acetaldehyde, propionaldehyde, octylaldehyde, benzaldehyde, amines such as methylamine, ethylamine, tributylamine, piperidine, aniline, pyridine, Amides such as oleamide and stearamide, nitriles such as acetonitrile, benzonitrile and tolunitrile, methyl isocyanate, iso And the like can be mentioned isocyanates such as Anne acid ethyl.

  In addition, examples of the organosilicon compound containing a Si—O—C bond include phenylalkoxysilane, alkylalkoxysilane, phenylalkylalkoxysilane, cycloalkylalkoxysilane, and cycloalkylalkylalkoxysilane. One or more of these are used.

  In the preparation of the solid catalyst component (A) for olefin polymerization in the present invention, in addition to the above essential components, aluminum trichloride, diethoxyaluminum chloride, diisopropoxyaluminum chloride, ethoxyaluminum dichloride, isopropoxyaluminum dichloride. , Aluminum compounds such as butoxyaluminum dichloride and triethoxyaluminum, or metal salts of organic acids such as sodium stearate, magnesium stearate and aluminum stearate, or liquid or viscous chain, partially hydrogenated, cyclic or modified at room temperature Polysiloxanes such as polysiloxanes can be used. As the chain polysiloxane, dimethylpolysiloxane and methylphenylpolysiloxane are used. As the partially hydrogenated polysiloxane, methylhydrogen polysiloxane having a hydrogenation rate of 10 to 80% is used. As the cyclic polysiloxane, hexamethylcyclopentane is used. Siloxane, 2,4,6-trimethylcyclotrisiloxane, 2,4,6,8-tetramethylcyclotrisiloxane, and modified polysiloxanes include higher fatty acid group-substituted dimethylsiloxane, epoxy group-substituted dimethylsiloxane, An oxyalkylene group-substituted dimethylsiloxane is exemplified.

  The solid catalyst component (A) for olefin polymerization can be prepared by contacting the component (a), the component (b), and the component (c) as described above. Although it is possible to perform the treatment in the absence of a solvent, it is preferable to perform the treatment in the presence of the solvent in consideration of ease 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, orthodichlorobenzene, methylene chloride, carbon tetrachloride, dichloroethane, and the like. Among them, aromatic hydrocarbon compounds which have a boiling point of about 90 to 150 ° C. and are liquid at room temperature, specifically, toluene, xylene and ethylbenzene are preferably used. In particular, the activity and stereospecificity of the solid catalyst component obtained by using toluene, xylene, and ethylbenzene for contact with each component or for washing after contact can be further improved.

  Further, as a method for preparing the solid catalyst component (A) for olefin polymerization, the magnesium compound of the above component (a) is dissolved in alcohol, titanium compound, carbonic acid or the like, and the component (b) or the component (b). And a method of obtaining a solid component by depositing a solid substance by contact with the component (c) or heat treatment, etc., and suspending the component (a) in the component (b) or an inert hydrocarbon compound solvent, etc. c) or a method in which the component (c) and the component (b) are contacted to obtain the solid catalyst component (A) for olefin polymerization.

  Among these, 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 solid catalyst component having a sharp particle size distribution can be obtained by using a spherical magnesium compound, and without using a spherical magnesium compound, for example, using a spray device. By forming particles by a so-called spray drying method in which a solution or suspension is sprayed and dried, a solid catalyst component having a spherical shape and a sharp particle size distribution can be obtained.

  The contact of each component is performed with stirring in a container equipped with a stirrer in an inert gas atmosphere and in a state where moisture and the like are removed. The contact temperature may be a relatively low temperature range around room temperature when the mixture is simply brought into contact with stirring and mixed, or dispersed or suspended for modification, but the product is allowed to react after contact. When obtaining, the temperature range of 40-130 degreeC is preferable. If the temperature during the reaction is less than 40 ° C., the reaction does not proceed sufficiently, resulting in insufficient performance of the prepared solid catalyst component, and if it exceeds 130 ° C., evaporation of the solvent used becomes remarkable. Therefore, it becomes difficult to control the reaction. The reaction time is 1 minute or longer, preferably 10 minutes or longer, more preferably 30 minutes or longer.

Below, the preparation method of the solid catalyst component (A) for olefin polymerization is illustrated.
(1) Magnesium chloride (a) is dissolved in tetraalkoxytitanium and then contacted with polysiloxane to obtain a solid product. The solid product and titanium tetrachloride (b) are reacted, and then component (c) To prepare a solid catalyst component (A) for olefin polymerization by catalytic reaction. In this case, the solid catalyst component (A) for olefin polymerization can be preliminarily polymerized with an organoaluminum compound, an organosilicon compound and an olefin.

  (2) Anhydrous magnesium chloride (a) and 2-ethylhexyl alcohol are reacted to form a homogeneous solution, and then the homogeneous solution is contacted with phthalic anhydride, and then this solution is mixed with titanium tetrachloride (b) and the component (c ) Is contacted to obtain a solid product, and titanium tetrachloride (b) is further contacted with the solid product to prepare a solid catalyst component (A) for olefin polymerization.

  (3) An organomagnesium compound (a) is synthesized by reacting magnesium metal, butyl chloride and dibutyl ether, and the organomagnesium compound is contacted with tetrabutoxy titanium and / or tetraethoxy titanium to produce a solid product. A method of preparing a solid catalyst component (A) for olefin polymerization by obtaining and reacting the solid product with component (c), dibutyl ether and titanium tetrachloride (b). At this time, the solid catalyst component (A) for olefin polymerization can also be prepared by preliminarily polymerizing the solid component with an organoaluminum compound, an organosilicon compound and an olefin.

  (4) An organomagnesium compound (a) such as dibutylmagnesium and an organoaluminum compound are contact-reacted with an alcohol such as butanol or 2-ethylhexyl alcohol in the presence of a hydrocarbon compound solvent to obtain a homogeneous solution. Contacting a silicon compound such as silicon tetrachloride, silicon trichloride, polysiloxane, etc. to obtain a solid product, which is then added to the solid product in the presence of an aromatic hydrocarbon compound solvent, titanium tetrachloride (b) and A method of obtaining a solid catalyst component (A) for polymerization of olefins by contacting component (c) and then further contacting titanium tetrachloride (b).

  (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 after adding titanium tetrachloride (b) to the solution, the temperature is increased. The solid product is precipitated, the component (c) is brought into contact with the solid product, and further reacted with titanium tetrachloride (b) to obtain the solid catalyst component (A) for olefin polymerization.

  (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 an aliphatic hydrocarbon compound to obtain a homogeneous solution (a ), And after adding titanium tetrachloride (b) to the solution, the temperature is raised to precipitate a solid product, which is brought into contact with component (c) and further reacted with titanium tetrachloride (b). And preparing a solid catalyst component (A) for olefin polymerization.

  (7) After diethoxymagnesium (a) is suspended in an alkylbenzene or halogenated hydrocarbon compound solvent, it is brought into contact with titanium tetrachloride (b), and then heated to contact with component (c) to form a solid. A method for preparing a solid catalyst component (A) for olefin polymerization by obtaining a product, washing the solid product with alkylbenzene, and then again contacting with titanium tetrachloride (b) in the presence of alkylbenzene. In this case, the solid component can be heat-treated in the presence or absence of a hydrocarbon compound solvent to obtain a solid catalyst component (A) for olefin polymerization.

  (8) After diethoxymagnesium (a) is suspended in alkylbenzene, it is contacted with titanium tetrachloride (b) and component (c) to obtain a solid product, and the solid product is washed with alkylbenzene. Then, the method of making it contact with titanium tetrachloride (b) again in presence of alkylbenzene and obtaining the solid catalyst component (A) for olefin polymerization. At this time, the solid component and titanium tetrachloride (b) can be contacted twice or more to obtain the solid catalyst component (A) for olefin polymerization.

(9) Grinding obtained by co-pulverizing a silicon compound represented by diethoxymagnesium (a), calcium chloride and Si (OR ¹⁵ ) ₄ (wherein R ¹⁵ represents an alkyl group or an aryl group). A solid catalyst for olefin polymerization is prepared by suspending a solid substance in an aromatic hydrocarbon compound, then contacting it with titanium tetrachloride (b) and component (c), and then further contacting titanium tetrachloride (b). A method for preparing component (A).

  (10) Diethoxymagnesium (a) and component (c) are suspended in alkylbenzene, the suspension is added to titanium tetrachloride (b) and reacted to obtain a solid product. A method of obtaining a solid catalyst component (A) for polymerizing olefins by washing titanium tetrachloride (b) again in the presence of alkylbenzene after washing the product with alkylbenzene.

  (11) Olefin polymerization by contacting aliphatic magnesium such as calcium halide and magnesium stearate with titanium tetrachloride (b) and component (c), and then further contacting with titanium tetrachloride (b). A method for preparing a solid catalyst component (A).

  (12) After diethoxymagnesium (a) is suspended in an alkylbenzene or halogenated hydrocarbon compound solvent, it is brought into contact with titanium tetrachloride (b), and then heated to cause contact reaction with component (c). A method of preparing a solid catalyst component (A) for olefin polymerization by obtaining a solid product, washing the solid product with alkylbenzene, and then contacting with titanium tetrachloride (b) again in the presence of alkylbenzene. The method for preparing the solid catalyst component (A) for olefin polymerization by contacting aluminum chloride in any stage of the suspension / contact and the contact reaction.

  (13) Diethoxymagnesium (a), 2-ethylhexyl alcohol and carbon dioxide are contact-reacted in the presence of toluene to obtain a homogeneous solution, and this solution is contacted with titanium tetrachloride (b) and component (c). To obtain a solid product, which is further dissolved in tetrahydrofuran, and then further solid product is precipitated. The solid product is reacted with titanium tetrachloride (b), and optionally with titanium tetrachloride (b ) Is repeated to prepare a solid catalyst component (A) for olefin polymerization. In this case, for example, a silicon compound such as tetrabutoxysilane may 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 compound solvent such as toluene, and then heated to obtain a homogeneous solution. To this solution, phthalic anhydride and titanium tetrachloride are added. (B) is contact-reacted to obtain a solid product, the solid product is contacted with component (c) and reacted, and the resulting reaction product is washed with alkylbenzene, and then again in the presence of alkylbenzene. A method for obtaining a solid catalyst component (A) for olefin polymerization by contacting titanium chloride (b).

  (15) The dialkoxymagnesium (a), the titanium compound and the component (c) are contact-reacted in the presence of toluene, the resulting reaction product is contacted with a silicon compound such as polysiloxane, and further titanium tetrachloride ( A method of obtaining a solid catalyst component (A) for polymerization of olefins by bringing b) into contact and then bringing a metal salt of an organic acid into contact and then bringing titanium tetrachloride (b) into contact again.

  (16) The dialkoxymagnesium (a) and the component (c) are suspended in an aromatic hydrocarbon solvent, heated to contact with silicon tetrachloride, and then contacted with titanium tetrachloride to obtain a solid product. The solid product is washed with an aromatic hydrocarbon solution, and then contacted with titanium tetrachloride again in the presence of the aromatic hydrocarbon to prepare the solid catalyst component (A) for olefin polymerization. In this case, the solid component may be heat-treated in the presence or absence of a hydrocarbon solvent to obtain a solid catalyst component (A) for olefin polymerization.

  As a preferred method for preparing the solid catalyst component (A) for olefin polymerization of the present invention, the component (a) is suspended in a liquid aromatic hydrocarbon compound such as toluene at room temperature, and then the component (b). Mentioning a method for preparing a solid catalyst component (A) for olefin polymerization by contacting the component (c) after contacting the component, or contacting the component (b) after contacting the component (c) Can do.

  Furthermore, the following methods are mentioned as a more preferable preparation method of the solid catalyst component (A) for olefin polymerization used in the present invention. For example, a suspension is formed by suspending dialkoxymagnesium in a liquid aromatic hydrocarbon compound at room temperature, and then titanium tetrachloride is added to this suspension at -20 to 100 ° C, preferably -10 to 70. It contacts at 0 degreeC, More preferably, 0-30 degreeC, It is made to react at 40-130 degreeC, More preferably, it is 70-120 degreeC. At this time, before or after the titanium tetrachloride is brought into contact with the above suspension, the component (c) is brought into contact at −20 to 130 ° C. to obtain a solid reaction product. After washing this solid reaction product with a liquid aromatic hydrocarbon compound at room temperature, titanium tetrachloride is contacted again at 40 to 130 ° C., more preferably at 70 to 120 ° C. in the presence of the aromatic hydrocarbon compound. The reaction is followed by washing with a liquid hydrocarbon compound at room temperature to obtain a solid catalyst component (A) for olefin polymerization.

  The amount of each compound used varies depending on the preparation method and cannot be defined unconditionally. For example, component (b) is 0.5 to 100 mol, preferably 0.5 to 50 mol, per mol of component (a), More preferably, it is 1-10 mol, and a component (c) is 0.01-10 mol, Preferably it is 0.01-1 mol, More preferably, it is 0.02-0.6 mol.

  In the solid catalyst component (A) for olefin polymerization used in the present invention, when the solid catalyst component is brought into contact with triethylaluminum, the extraction amount of at least one electron donor is 20 to 60 mol%, In order to make the extraction amount of at least one kind of electron donor more than 60 mol%, the kind and content of the electron donor may be adjusted mainly as described above, and it is particularly preferable for the electron donor. Although it was illustrated as a thing and illustrated as a preferable thing, if content is selected, it can adjust more easily.

  Based on the above, Tables 1 and 2 show preferable combinations of two or more electron donors contained in the solid catalyst component (A) of the present invention.

  The organoaluminum compound (B) (hereinafter sometimes referred to as “component (B)”) used in forming the olefin polymerization catalyst of the present invention is a compound represented by the above general formula (1). Can be used. Specific examples of such an organoaluminum compound (B) include triethylaluminum, diethylaluminum chloride, triisobutylaluminum, diethylaluminum bromide, and diethylaluminum hydride, and one or more can be used. Triethylaluminum and triisobutylaluminum are preferable.

  The external electron donating compound (C) (hereinafter sometimes referred to as “component (C)”) used in forming the olefin polymerization catalyst of the present invention is used for the preparation of the solid catalyst component described above. The same electron donors can be used, among which 9,9-bis (methoxymethyl) fluorene, 2-isopropyl-2-isopentyl-1,3-dimethoxypropane, 2,2-diisobutyl-1, 3-dimethoxypropane, 2,2-dicyclohexyl-1,3-dimethoxypropane, 2,2-bis (cyclohexylmethyl) -1,3-dimethoxypropane, 2-cyclohexyl-2-isopropyl-1,3-dimethoxypropane, 2-isopropyl-2-s-butyl-1,3-dimethoxypropane, 2,2-diphenyl-1,3-dimethoxypropyl Lopan, ethers such as 2-cyclopentyl-2-isopropyl-1,3-dimethoxypropane, esters such as methyl benzoate and ethyl benzoate, 2,6- such as 2,2,6,6-tetramethylpiperidine Substituted piperidines, 2,5-substituted piperidines, substituted methylenediamines such as N, N, N ′, N′-tetramethylmethylenediamine, and organosilicon compounds.

As said organosilicon compound, following General formula (2);
R ² _q Si (OR ³ ) _4-q (2)
(In the formula, R ² 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, and may be the same or different, and R ³ represents 1 to 4 carbon atoms. And an alkyl group, a cycloalkyl group, a phenyl group, a vinyl group, an allyl group, and an aralkyl group, which may be the same or different, and q is an integer of 0 ≦ q ≦ 3). It is done. Examples of such an organosilicon compound include phenylalkoxysilane, alkylalkoxysilane, phenylalkylalkoxysilane, cycloalkylalkoxysilane, and cycloalkylalkylalkoxysilane.

  Specific examples of the organosilicon compounds include trimethylmethoxysilane, trimethylethoxysilane, tripropylmethoxysilane, tripropylethoxysilane, tributylmethoxysilane, triisobutylmethoxysilane, tri-tert-butylmethoxysilane, tributylethoxysilane. , Tricyclohexylmethoxysilane, tricyclohexylethoxysilane, cyclohexyldimethylmethoxysilane, cyclohexyldiethylmethoxysilane, cyclohexyldiethylethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, dipropyldimethoxysilane, diisopropyldimethoxysilane, dipropyldiethoxysilane, Diisopropyldiethoxysilane, dibutyldimethoxysilane, diisobutyldi Toxisilane, di-tert-butyldimethoxysilane, dibutyldiethoxysilane, butylmethyldimethoxysilane, bis (2-ethylhexyl) dimethoxysilane, bis (2-ethylhexyl) diethoxysilane, dicyclopentyldimethoxysilane, dicyclopentyldiethoxysilane, Dicyclohexyldimethoxysilane, dicyclohexyldiethoxysilane, bis (3-methylcyclohexyl) dimethoxysilane, bis (4-methylcyclohexyl) dimethoxysilane, bis (3,5-dimethylcyclohexyl) dimethoxysilane, cyclohexylcyclopentyldimethoxysilane, cyclohexylcyclopentyldiethoxy Silane, cyclohexylcyclopentyl dipropoxysilane, 3-methylcyclohexylcyclopenty Dimethoxysilane, 4-methylcyclohexylcyclopentyldimethoxysilane, 3,5-dimethylcyclohexylcyclopentyldimethoxysilane, 3-methylcyclohexylcyclohexyldimethoxysilane, 4-methylcyclohexylcyclohexyldimethoxysilane, 3,5-dimethylcyclohexylcyclohexyldimethoxysilane, cyclopentylmethyldimethoxy Silane, cyclopentylmethyldiethoxysilane, cyclopentylethyldiethoxysilane, cyclopentyl (isopropyl) dimethoxysilane, cyclopentyl (isobutyl) dimethoxysilane, cyclohexylmethyldimethoxysilane, cyclohexylmethyldiethoxysilane, cyclohexylethyldimethoxysilane, cyclohexylethyldiethoxysilane , Cyclohexyl (propyl) dimethoxysilane, cyclohexyl (isopropyl) dimethoxysilane, cyclohexyl (propyl) diethoxysilane, cyclohexyl (isobutyl) dimethoxysilane, cyclohexyl (butyl) diethoxysilane, cyclohexyl (pentyl) dimethoxysilane, cyclohexyl (pentyl) Diethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, phenylmethyldimethoxysilane, phenylmethyldiethoxysilane, phenylethyldimethoxysilane, phenylethyldiethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, Ethyltriethoxysilane, propyltrimethoxysilane, isopropyltrimethoxysilane, Pyrtriethoxysilane, isopropyltriethoxysilane, butyltrimethoxysilane, isobutyltrimethoxysilane, tert-butyltrimethoxysilane, butyltriethoxysilane, 2-ethylhexyltrimethoxysilane, 2-ethylhexyltriethoxysilane, cyclopentyltrimethoxysilane , Cyclopentyltriethoxysilane, cyclohexyltrimethoxysilane, cyclohexyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, tetrabutoxy A silane etc. can be mentioned. Among the above, dipropyldimethoxysilane, diisopropyldimethoxysilane, dibutyldimethoxysilane, diisobutyldimethoxysilane, di-tert-butyldimethoxysilane, dibutyldiethoxysilane, tert-butyltrimethoxysilane, dicyclohexyldimethoxysilane, dicyclohexyldiethoxysilane, Cyclohexylmethyldimethoxysilane, cyclohexylmethyldiethoxysilane, cyclohexylethyldimethoxysilane, cyclohexylethyldiethoxysilane, dicyclopentyldimethoxysilane, dicyclopentyldiethoxysilane, cyclopentylmethyldimethoxysilane, cyclopentylmethyldiethoxysilane, cyclopentylethyldiethoxysilane, Cyclohexylcyclopentyl dimeth Sisilane, cyclohexylcyclopentyldiethoxysilane, 3-methylcyclohexylcyclopentyldimethoxysilane, 4-methylcyclohexylcyclopentyldimethoxysilane, 3,5-dimethylcyclohexylcyclopentyldimethoxysilane are preferably used, and the organosilicon compound (C) is one or two. It can be used in combination of more than one species.

  Next, the catalyst for olefin polymerization of the present invention contains the above-described solid catalyst component (A), component (B), and component (C) for olefin polymerization, and polymerization of olefins in the presence of the catalyst. Copolymerization is performed. Examples of olefins include ethylene, propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, and vinylcyclohexane. These olefins can be used alone or in combination of two or more. In particular, ethylene, propylene and 1-butene are preferably used. Particularly preferred is propylene. In the case of polymerization of propylene, copolymerization with other olefins can also be performed. Examples of 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 arbitrary as long as it does not affect the effect of the present invention, and is not particularly limited. However, the component (B) is usually in the solid catalyst component (A) for olefin polymerization. 1 to 2000 mol, preferably 50 to 1000 mol, per 1 mol of titanium atom. Component (C) is used in an amount of 0.002 to 10 mol, preferably 0.01 to 2 mol, particularly preferably 0.01 to 0.5 mol, per mol of component (B).

  The order of contact of each component is arbitrary, but the organoaluminum compound (B) is first charged into the polymerization system, then the organosilicon compound (C) is contacted, and the solid catalyst component (A) for olefin polymerization is further added. It is desirable to contact.

  The polymerization method in 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 state of gas and 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. Moreover, any of a continuous polymerization method and a batch type polymerization method is possible. Furthermore, the polymerization reaction may be performed in one stage or in two or more stages.

  Furthermore, in polymerizing olefins using the catalyst containing the solid catalyst component for olefin polymerization (A), component (B), and component (C) in the present invention (also referred to as main polymerization), catalytic activity and steric properties are considered. In order to further improve the regularity and the particle properties of the resulting polymer, it is desirable to perform prepolymerization prior to the main polymerization. In the prepolymerization, the same olefins as in the main polymerization or monomers such as styrene can be used.

  In carrying out the prepolymerization, the order of contacting the respective components and monomers is arbitrary, but preferably the component (B) is first charged into the prepolymerization system set to an inert gas atmosphere or an olefin gas atmosphere, and then the olefin. After contacting the solid catalyst component (A) for homopolymerization, 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 to an inert gas atmosphere or olefin gas atmosphere, and then component (C) is contacted, A method of contacting an olefin such as propylene and / or one or other two or more olefins after contacting the solid catalyst component (A) for olefin polymerization is desirable.

  When olefins are polymerized in the presence of an olefin polymerization catalyst formed according to the present invention, the olefin weight is maintained in a high yield while maintaining high stereoregularity compared to the case of using a conventional catalyst. A coalescence can be obtained and it shows excellent activity persistence.

EXAMPLES Next, the present invention will be further described with reference to examples. However, this is merely an example and does not limit the present invention. Example 9 is a reference example in the present invention.

[Preparation of solid catalyst component (A)]
A 500 ml round bottom flask, which was sufficiently replaced with nitrogen gas and equipped with a stirrer, was charged with 10 grams of diethoxymagnesium and 80 ml of toluene to form a suspended state. Next, 20 ml of titanium tetrachloride was added to the suspension solution, the temperature was raised, and when the temperature reached 80 ° C., 1.9 grams of diethyl diisobutylmalonate, 0.15 grams of diethyl phthalate, dibutyl phthalate as electron donors 2.0 grams was added and the temperature was further raised to 110 ° C. Thereafter, the reaction was carried out with stirring for 1 hour while maintaining a temperature of 110 ° C. After completion of the reaction, the mixture was washed 3 times with 100 ml of toluene at 90 ° C., 20 ml of titanium tetrachloride and 80 ml of toluene were newly added, the temperature was raised to 110 ° C., and the reaction was carried out with stirring for 1 hour. After completion of the reaction, the solid catalyst component was obtained by washing 7 times with 100 ml of heptane at 40 ° C. The solid liquid in the solid catalyst component was separated, and the titanium content in the solid content was measured. The titanium content was 3.5% by weight. Further, the electron donor in the solid catalyst component, its content, and the extraction rate with trietrium aluminum were analyzed, and the results are shown in Table 3. The electron donor content in the solid catalyst component and the extraction rate of the electron donor with triethylaluminum were measured as follows. In Table 3, “low extractable electron donor” indicates the content (% by weight) of the low extractable electron donor in the electron donor.

[Measurement of electron donor content in solid catalyst component]
A magnetic stirring bar and 3 g of a solid catalyst component were placed in a round bottom flask with an internal volume of 200 ml sufficiently substituted with nitrogen gas, and 10 ml of 4N hydrochloric acid and 20 ml of toluene were added thereto to obtain a suspension. . After the suspension was shaken well, the toluene solution portion was separated and washed 3 times with 10 ml of distilled water. The electron donor contained in the obtained toluene moiety was quantified using gas chromatography to identify each electron donor and the content (% by weight) of each electron donor.

[Measurement of extraction rate of electron donor with triethylaluminum]
A magnetic stir bar, 100 ml of heptane, 3 grams of solid catalyst, and 6.4 grams of triethylaluminum were added to a flask with an internal volume of 200 milliliters completely replaced with nitrogen gas and stirred at room temperature. After 30 minutes, the solid and liquid were separated using a glass filter, and the obtained solid was washed with 100 ml of heptane three times and dried under vacuum. The electron donor content in the solid was measured according to the method for measuring the electron donor content in the solid catalyst component, and the electron donor content (% by weight) after extraction was measured. For the electron donor content (% by weight) after extraction thus obtained, the ratio (mol%) to the electron donor content (% by weight) in the solid catalyst component obtained above is calculated and extracted. Rate (mol%).

[Formation and polymerization of polymerization catalyst]
Into an autoclave with a stirrer having an internal volume of 2.0 liters completely replaced with nitrogen gas, 1.32 mmol of triethylaluminum, 0.13 mmol of cyclohexylmethyldimethoxysilane and 0.0026 mmol of the solid catalyst component as titanium atoms were charged, A polymerization catalyst was formed. Thereafter, 1.5 liters of hydrogen gas and 1.4 liters of liquefied propylene were charged, preliminarily polymerized at 20 ° C. for 5 minutes, then heated, and polymerized at 70 ° C. for 1 hour and 2 hours. Table 7 shows the polymerization activity per gram of the solid catalyst component at this time, the ratio (HI) of boiling n-heptane insoluble matter in the produced polymer, and the melt index value (MI) of the produced polymer (a).

The polymerization activity per solid catalyst component used here was calculated by the following equation.
Polymerization activity = produced polymer (g) / solid catalyst component (g)
Moreover, the ratio (HI) of the insoluble portion of boiling heptane in the produced polymer was defined as the proportion (% by weight) of the polymer insoluble in heptane when the produced polymer was extracted with boiling heptane for 6 hours.
Furthermore, the melt index value (MI) of the produced polymer (a) was measured according to ASTM D 1238 and JIS K 7210.

Example 2
A solid component was prepared in the same manner as in Example 1 except that 2.3 g of diethyl diisobutylmalonate, 0.1 g of diethyl phthalate, and 1.6 g of dibutyl phthalate were used as electron donors. Was formed and polymerized. The titanium content was 3.6% by weight. Further, the electron donor in the solid catalyst component, its content, and the extraction rate with trietrium aluminum were analyzed, and the results are shown in Table 3. Table 7 shows the polymerization activity per gram of the solid catalyst component, the ratio of boiling n-heptane insoluble matter in the product polymer (HI), and the melt index value (MI) of the product polymer (a).

Example 3
A solid component was prepared in the same manner as in Example 1 except that 1.1 g of diethyl 2,3-diisopropyl succinate, 0.14 g of diethyl phthalate, and 1.8 g of dibutyl phthalate were used as electron donors. Further, a polymerization catalyst was formed and polymerized. The titanium content was 3.5% by weight. Further, the electron donor in the solid catalyst component, its content, and the extraction rate with trietrium aluminum were analyzed, and the results are shown in Table 3. Table 7 shows the polymerization activity per gram of the solid catalyst component, the ratio of boiling n-heptane insoluble matter in the product polymer (HI), and the melt index value (MI) of the product polymer (a).

Example 4
A solid component was prepared in the same manner as in Example 1 except that 1.4 g of diethyl maleate, 0.09 g of diethyl phthalate, and 1.5 g of dibutyl phthalate were used as electron donors. Was formed and polymerized. The titanium content was 3.1% by weight. Further, the electron donor in the solid catalyst component, its content, and the extraction rate by trietolu aluminum were analyzed, and the results are shown in Table 4. Table 7 shows the polymerization activity per gram of the solid catalyst component, the ratio of boiling n-heptane insoluble matter in the product polymer (HI), and the melt index value (MI) of the product polymer (a).

Example 5
A solid component was prepared in the same manner as in Example 1 except that 1.6 g of diethyl methylcyclopentylmalonate, 0.07 g of diethyl phthalate, and 1.4 g of dibutyl phthalate were used as electron donors. Catalyst formation and polymerization were performed. The titanium content was 3.4% by weight. Further, the electron donor in the solid catalyst component, its content, and the extraction rate by trietolu aluminum were analyzed, and the results are shown in Table 4. Table 7 shows the polymerization activity per gram of the solid catalyst component, the ratio of boiling n-heptane insoluble matter in the product polymer (HI), and the melt index value (MI) of the product polymer (a).

Example 6
A solid component was prepared in the same manner as in Example 1 except that 2.3 g of diethyl diisobutylmalonate, 0.09 g of diethyl phthalate, and 1.6 g of diisobutyl phthalate were used as electron donors. Was formed and polymerized. The titanium content was 3.5% by weight. Further, the electron donor in the solid catalyst component, its content, and the extraction rate by trietolu aluminum were analyzed, and the results are shown in Table 4. Table 7 shows the polymerization activity per gram of the solid catalyst component, the ratio of boiling n-heptane insoluble matter in the product polymer (HI), and the melt index value (MI) of the product polymer (a).

Example 7
Examples were used except that 1.3 g of diethyl diisobutylmalonate, 0.14 g of diethyl phthalate, 0.49 g of diethyl 2,3-diisopropylsuccinate, and 1.6 g of dibutyl phthalate were used as electron donors. A solid component was prepared in the same manner as in Example 1, and a polymerization catalyst was formed and polymerized. The titanium content in the obtained solid catalyst component was 3.6% by weight. In addition, the electron donor in the solid catalyst component, its content, and the extraction rate with trietrialuminum were analyzed, and the results are shown in Table 5. Table 7 shows the polymerization activity per gram of the solid catalyst component, the ratio of boiling n-heptane insoluble matter in the product polymer (HI), and the melt index value (MI) of the product polymer (a).

Example 8
8.3 grams of anhydrous magnesium chloride, 50 ml of decane and 40.8 ml of 2-ethylhexyl alcohol were mixed and reacted at 130 ° C. for 2 hours to obtain a homogeneous solution. 1.9 grams of phthalic anhydride was added to this solution and stirred at 130 ° C. for 1 hour to obtain a uniform solution. This homogeneous solution was cooled to room temperature and added to 350 ml of titanium tetrachloride cooled to −20 ° C. over 1 hour. Thereafter, the temperature was raised to 110 ° C. over 4 hours. When the temperature reached 110 ° C., 1.7 g of diethyl diisobutyl succinate, 0.07 g of diethyl phthalate and 1.0 g of diisobutyl phthalate were added as electron donors, and the mixture was further stirred for 2 hours while maintaining at 110 ° C. . The solid and liquid were separated after the reaction. 350 ml of titanium tetrachloride was added to the solid part and reacted at 110 ° C. for 2 hours. After completion of the reaction, the solid and liquid were separated to obtain a solid part. This solid part was washed with heptane at 60 ° C. until no free titanium compound was observed in the solution. The titanium content in the obtained solid catalyst component was 3.6% by weight. Polymerization similar to Example 7 was performed using this solid catalyst component. The electron donor and its content in the solid catalyst component and the extraction rate with trietrialuminum were analyzed, and the results are shown in Table 5. Table 7 shows the polymerization activity per gram of the solid catalyst component, the ratio of boiling n-heptane insoluble matter in the product polymer (HI), and the melt index value (MI) of the product polymer (a).

Example 9
A solid component was prepared in the same manner as in Example 8 except that 1.6 g of diethyl diisobutylmalonate and 1.0 g of diisobutyl phthalate were used as the electron donor, and a polymerization catalyst was formed and polymerized. . The titanium content was 3.5% by weight. In addition, the electron donor in the solid catalyst component, its content, and the extraction rate with trietrialuminum were analyzed, and the results are shown in Table 5. Table 7 shows the polymerization activity per gram of the solid catalyst component, the ratio of boiling n-heptane insoluble matter in the product polymer (HI), and the melt index value (MI) of the product polymer (a).

Comparative Example 1
A solid component was prepared in the same manner as in Example 1 except that 0.18 g of diethyl phthalate and 2.8 g of diisobutyl phthalate were used as electron donors, and a polymerization catalyst was formed and polymerized. The titanium content was 3.4% by weight. In addition, the electron donor in the solid catalyst component, its content, and the extraction rate with trietrium aluminum were analyzed, and the results are shown in Table 6. Table 7 shows the polymerization activity per gram of the solid catalyst component, the ratio of boiling n-heptane insoluble matter in the product polymer (HI), and the melt index value (MI) of the product polymer (a).

Comparative Example 2
A solid component was prepared in the same manner as in Example 1 except that 3.1 g of diethyl diisobutylmalonate and 0.18 g of diethyl phthalate were used as the electron donor, and a polymerization catalyst was formed and polymerized. The titanium content was 3.5% by weight. In addition, the electron donor in the solid catalyst component, its content, and the extraction rate with trietrium aluminum were analyzed, and the results are shown in Table 6. Table 7 shows the polymerization activity per gram of the solid catalyst component, the ratio of boiling n-heptane insoluble matter in the product polymer (HI), and the melt index value (MI) of the product polymer (a).

Comparative Example 3
A solid component was prepared in the same manner as in Example 1 except that 0.5 g of diethyl malonate, 0.14 g of diethyl phthalate, and 1.8 g of dibutyl phthalate were used as electron donors. Formation and polymerization were performed. The titanium content was 2.9% by weight. In addition, the electron donor in the solid catalyst component, its content, and the extraction rate with trietrium aluminum were analyzed, and the results are shown in Table 6. Table 7 shows the polymerization activity per gram of the solid catalyst component, the ratio of boiling n-heptane insoluble matter in the product polymer (HI), and the melt index value (MI) of the product polymer (a).

Comparative Example 4
A solid component was prepared in the same manner as in Example 1 except that 1.0 g of diethyl diisobutylmalonate, 0.04 g of diethyl phthalate, and 2.2 g of dibutyl phthalate were used as electron donors. Catalyst formation and polymerization were performed. The titanium content was 3.1% by weight. In addition, the electron donor in the solid catalyst component, its content, and the extraction rate with trietrium aluminum were analyzed, and the results are shown in Table 6. Table 7 shows the polymerization activity per gram of the solid catalyst component, the ratio of boiling n-heptane insoluble matter in the product polymer (HI), and the melt index value (MI) of the product polymer (a).

  From the results of Table 7, by polymerizing olefins using the solid catalyst component and catalyst of the present invention, an olefin polymer having higher stereoregularity can be obtained in a high yield, and the activity sustainability is excellent. I understand that.

It is a flowchart figure which shows the process of preparing the polymerization catalyst of this invention.

Claims (11)

Magnesium, titanium, halogen,
An electron donor (c1) comprising at least one electron donor selected from malonic acid diester derivatives, succinic acid diester derivatives and maleic acid diester derivatives , and further comprising diethyl phthalate or a derivative thereof ;
One or more electron donors (c2) selected from phthalic acid diesters and derivatives thereof excluding diethyl phthalate and derivatives thereof;
Comprising
The solid catalyst component for olefin polymerization, wherein the electron donor of the component (c1) is 30 to 80% by weight of the total electron donor. The solid catalyst component is obtained by bringing the magnesium compound (a), the titanium halide compound (b), the electron donor (c1), and the electron donor (c2) into contact with each other. The solid catalyst component for olefin polymerization according to 1 . The solid catalyst component for olefin polymerization according to claim 2 , wherein the magnesium compound (a) is dialkoxymagnesium. The solid catalyst component for olefin polymerization according to claim 2 , wherein the titanium halide compound (b) is titanium tetrachloride.   In the malonic acid diester derivative, succinic acid diester derivative and maleic acid diester derivative, one or two hydrogen atoms of a hydrocarbon group to which two alkoxycarbonyl groups are bonded are substituted with an alkyl group or a cycloalkyl group. The solid catalyst component for olefin polymerization according to claim 1, wherein   2. The diethyl phthalate derivative and the diphthalate diester derivative, wherein one hydrogen atom of a benzene ring to which two alkoxycarbonyl groups are bonded is substituted with an alkyl group or a halogen atom. The solid catalyst component for olefin polymerization described in 1. (A) The solid catalyst component for olefin polymerization according to any one of claims 1 to 6 ,
(B) the following general formula (1);
R ¹ _p AlQ _3-p (1) (wherein R ¹ 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) A catalyst for olefin polymerization, comprising an organoaluminum compound represented by formula (II) and (C) an external electron donating compound. The (C) external electron donating compound is represented by the following general formula (2):
R ² _q Si (OR ³ ) _4-q (2)
(In the formula, R ² 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, and may be the same or different. R ³ has 1 to 4 carbon atoms. An alkyl group, a cycloalkyl group, a phenyl group, a vinyl group, an allyl group or an aralkyl group, which may be the same or different, and q is an integer of 0 ≦ q ≦ 3. The catalyst for olefin polymerization according to claim 7 , wherein The catalyst for olefin polymerization according to claim 8 , wherein the silicon compound (C) is an alkyltrialkoxysilane. A method for producing an olefin polymer, which is carried out in the presence of the catalyst for olefin polymerization according to any one of claims 7 to 9 . The method for producing an olefin polymer according to claim 10 , wherein the olefin polymer is a propylene polymer.

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