JP3202268B2 - Olefin polymerization catalyst - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[Background of the Invention]

The present invention relates to a catalyst for olefin polymerization. More specifically, the present invention relates to a catalyst capable of obtaining a highly stereoregular polymer in a high yield when applied to polymerization of an olefin having 3 or more carbon atoms. With conventional catalysts, when polymerizing propylene or the like, it may be necessary to carry out so-called "prepolymerization" of olefins before main polymerization in order to improve the stereoregularity and powder properties of the resulting polymer. To a large extent, the catalyst according to the invention makes it possible to omit its prepolymerization.

[0002]

2. Description of the Related Art In recent years, many proposals have been made to produce a highly stereoregular polymer of an α-olefin having 3 or more carbon atoms by using a solid component containing titanium, magnesium and halogen as essential components. . According to such a conventional proposed method, the above-mentioned pre-polymerization was essential for actually performing the polymerization.

[0003]

However, this pre-polymerization often leads to a decrease in catalytic activity and a deterioration in catalytic properties in many cases, and there is a need for improvement.

[0004]

[Means for Solving the Problems]

[Summary of the Invention] <Summary> The purpose of the present invention is to provide a solution to the above points, and to achieve this object by using a solid catalyst component having a specific configuration as a Ziegler type catalyst. It is.

That is, the olefin polymerization catalyst according to the present invention is characterized by comprising the following components (A) and (B). Component (A) is composed of the following component (i), component (ii) and component (iii). Component (iii) is prepared by contacting component (i) with component (iii) in the presence of component (ii). A contact product obtained by polymerization, wherein the polymerization amount of component (iii) is 0.0% per gram of component (i).
Solid catalyst component in the range of 1 to 10 grams. Component (i) a Ziegler-type catalyst component containing titanium, magnesium and halogen as essential components, component (ii) alcohol and / or water, and an inorganic halogen compound, component (iii) aromatic vinyl or allyl, component (B) ) Organoaluminum compounds.

<Effects> The catalyst for olefin polymerization according to the present invention is capable of converting a highly active and highly stereoregular polymer into a powdery property without performing prepolymerization with propylene or the like, which is required for conventional catalysts. It is possible to get in good condition. Further, the catalyst according to the present invention does not use an organometallic compound, particularly an organoaluminum compound, which has been conventionally required at the time of the prepolymerization of the component (iii) when the prepolymerization is carried out in the production of the component (A). However, it has the advantage that prepolymerization can be performed. In general, prepolymerization using an organometallic compound often has problems such as a decrease in catalytic activity and a deterioration in catalytic properties.
According to the present invention, the above problems can be solved together.

Further, by producing a propylene block copolymer with the catalyst according to the present invention using substantially no solvent, a propylene block copolymer having high activity, high rigidity and high impact strength can be stably obtained. Can be manufactured. Further, according to the present invention, when the weight of the rubbery copolymer increases (for example, 50% by weight or more)
In addition, the polymer particles have low tackiness, and can solve the problems in the driving operation, which has been a problem in the past.

Further, the solid catalyst component of the present invention has good catalytic properties, for example, good fluidity of the catalyst and a small amount of adhesion, so that the solid component can be uniformly introduced into the polymerization tank of the catalyst. Thus, the production apparatus for the target polymer can be stably operated.

[Specific description of the invention] [Catalyst] The olefin polymerization catalyst according to the present invention comprises a specific component (A) and a specific component (B).
Herein, “consisting of” does not mean that the components are only those listed (ie, A and B) and does not preclude the coexistence of a purposeful third component.

Component (A) Component (A) of the catalyst of the present invention is a solid catalyst component obtained by contacting the following components (i) to (iii).
Here, "obtained by contact" does not mean that the object is only the indicated one (i.e., (i) to (iii)), but the coexistence of other components for the purpose Do not eliminate.

Component (i) Component (i) is a Ziegler-type catalyst component containing titanium, magnesium and halogen as essential components.
Here, "containing as an essential component" means that in addition to the three components listed, other purposeful elements may be included, and each of these elements exists as a purposeful arbitrary compound. And that these elements may be present as bonded to each other. The solid component itself for Ziegler catalysts containing titanium, magnesium and halogen is known per se.
For example, JP-A-53-45688 and JP-A-54-3894.
Nos. 54-31092, 54-39483, 54-94591, 54-118484, 54
No. 131589, No. 55-75411, No. 55-9
No. 0510, No. 55-90511, No. 55-1274
No. 05, No. 55-147507, No. 55-15500
No. 3, No. 56-18609, No. 56-70005,
Nos. 56-72001, 56-86905, 56
-90807, 56-155206, 57-3
No. 803, No. 57-34103, No. 57-92007
Nos. 57-121003, 58-5309, 58-5310, 58-5311, 58-87
No. 06, No. 58-27732, No. 58-32604
Nos. 58-32605, 58-67703, 58-117206, 58-127708, and 5
Nos. 8-183708, 58-183709, 59
JP-A-149905, JP-A-59-149906 and the like are used.

The magnesium compound used as a magnesium source in the present invention includes magnesium dihalide, dialkoxymagnesium, alkoxymagnesium halide, magnesium oxyhalide, dialkylmagnesium, magnesium oxide, magnesium hydroxide, magnesium carboxylate and the like. Is raised. Of these, magnesium dihalide is preferred.

The titanium compound serving as a titanium source is represented by the general formula Ti (OR ¹ ) _4-n X _n (where R ¹ is a hydrocarbon residue, preferably having about 1 to 10 carbon atoms). ,
X represents a halogen, and n represents a number satisfying 0 ≦ n ≦ 4. )). As a specific example, Ti
Cl ₄ , TiBr ₄ , Ti (OC ₂ H ₅ ) Cl ₃ , Ti
(OC ₂ H ₅ ) ₂ Cl ₂ , Ti (OC ₂ H ₅ ) ₃ Cl,
_{Ti (O-iC 3 H 7} ) Cl 3, Ti (O-nC
_{4 H 9) Cl 3, Ti} (O-nC 4 H 9) 2 Cl 2, T
i (OC ₂ H ₅ ) Br ₃ , Ti (OC ₂ H ₅ ) (OC _{4
H 9) 2 Cl, Ti (} O-nC 4 H 9) 3 Cl, Ti
_{(O-C 6 H 5)} Cl 3, Ti (O-iC 4 H 9) 2 C
l ₂ , Ti (OC ₅ H ₁₁ ) Cl ₃ , Ti (OC ₆ H
_{13) Cl 3, Ti (OC} 2 H 5) 4, Ti (O-nC
_{3 H 7) 4, Ti (} O-nC 4 H 9) 4, Ti (O-i
_{C 4 H 9) 4, Ti} (O-nC 6 H 13) 4, Ti (O
—NC ₈ H ₁₇ ) ₄ , Ti [OCH ₂ CH (C ₂ H ₅ )
C ₄ H ₉ ] _{4 and the} like.

Further, a molecular compound obtained by reacting an electron donor described later with TiX ′ ₄ (here, X ′ represents a halogen) can be used as a titanium source. A specific example of such a molecular compound is TiCl ₄ .CH ₃ COC
₂ H ₅ , TiCl ₄ .CH ₃ CO ₂ C ₂ H ₅ , TiCl
_{4 · C 6 H 5 NO 2} , TiCl 4 · CH 3 COCl, T
iCl ₄ .C ₆ H ₅ COCl, TiCl ₄ .C ₆ H ₅ C
O ₂ C ₂ H ₅ , TiCl ₄ .ClCOC ₂ H ₅ , TiC
l ₄ · _{C 4 H 4} O, and the like.

Further, TiCl ₃ (including TiCl ₄ reduced with H ₂ , reduced with Al metal, or reduced with an organometallic compound), TiBr ₃ , Ti
It is also possible to use a titanium compound such as (OC ₂ H ₅ ) Cl ₂ , TiCl ₂ , dicyclopentadienyltitanium dichloride. Among these titanium compounds, TiCl
₄ , Ti (OC ₄ H ₉ ) ₄ , Ti (OC ₂ H ₅ ) Cl ₃
Are preferred.

The halogen is usually supplied from the above-mentioned halides of magnesium and / or titanium, but other halogen sources such as known halides such as aluminum halides, silicon halides and phosphorus halides. Can also be supplied from the halogenating agent. The halogen contained in the catalyst component may be fluorine, chlorine, bromine, iodine or a mixture thereof,
Particularly, chlorine is preferred.

The solid components used in the present invention include Al (O-iC ₃ H ₇ ) ₃ , AlCl ₃ , and AlB in addition to the above essential components.
r ₃ , Al (OC ₂ H ₅ ) ₃ , Al (OCH ₃ ) ₂ Cl
And B (OCH ₃ ) ₃ , B
Other components such as boron compounds such as (OC ₂ H ₅ ) ₃ and B (OC ₆ H ₅ ) ₃ , and other components such as WCl ₆ and MoCl ₅ can be used. These components are solid components such as silicon, aluminum and boron. It can be left inside.

Further, when producing this solid component, it can be produced using an electron donor as an internal donor. Examples of electron donors (internal donors) that can be used in the production of this solid component include alcohols, phenols, ketones, aldehydes, carboxylic acids, esters of organic or inorganic acids, ethers, acid amides, and acids. Oxygen-containing electron donors such as anhydrides, ammonia, amines,
Examples thereof include nitrogen-containing electron donors such as nitriles and isocyanates.

More specifically, (a) methanol, ethanol, propanol, pentanol, hexanol,
Octanol, dodecanol, octadecyl alcohol, benzyl alcohol, phenylethyl alcohol,
Alcohols having 1 to 18 carbon atoms such as cumyl alcohol and isopropylbenzyl alcohol, (ii) phenol, cresol, xylenol, ethyl phenol,
C6 to C25 phenols which may have an alkyl group, such as propylphenol, cumylphenol, nonylphenol, and naphthol; and (C) C3 to C15 phenols such as acetone, methyl ethyl ketone, methyl isobutyl ketone, acetophenone and benzophenone. Ketones, (d) acetaldehyde, propionaldehyde,
C2 to C15 aldehydes such as octyl aldehyde, benzaldehyde, tolualdehyde, naphthaldehyde, methyl (fo) formate, methyl acetate, ethyl acetate, vinyl acetate, propyl acetate, octyl acetate, cyclohexyl acetate, cellosolve acetate, propionic acid ethyl,
Methyl butyrate, ethyl valerate, ethyl stearate, methyl chloroacetate, ethyl dichloroacetate, methyl methacrylate, ethyl crotonate, ethyl cyclohexanecarboxylate, methyl benzoate, ethyl benzoate, propyl benzoate, butyl benzoate, benzoic acid Octyl, cyclohexyl benzoate, phenyl benzoate, benzyl benzoate, cellosolve benzoate, methyl toluate, ethyl toluate, amyl toluate, ethyl benzoate, methyl anisate, ethyl anisate, ethyl ethoxy benzoate,
C2-C2 such as diethyl phthalate, dibutyl phthalate, diheptyl phthalate, γ-butyrolactone, α-valerolactone, coumarin, phthalide, ethylene carbonate, etc.
Organic acid esters 0, (f) inorganic acid esters such as silicates such as ethyl silicate, butyl silicate and phenyltriethoxysilane, (g) acetyl chloride, benzoyl chloride, toluic acid chloride, anisic acid C2 to C15 acid halides such as chloride, phthaloyl chloride and phthaloyl chloride; and C2 to C2 such as (thi) methyl ether, ethyl ether, isopropyl ether, butyl ether, amyl ether, tetrahydrofuran, anisole and diphenyl ether.
0 ethers, (li) acetic acid amide, benzoic acid amide,
Acid amides such as toluic acid amide, (nu) methylamine, ethylamine, diethylamine, tributylamine, piperidine, tribenzylamine, amines such as aniline, pyridine, picoline, tetramethylethylenediamine, (l) acetonitrile, benzonitrile, And nitriles such as tolunitrile. Two or more of these electron donors can be used. Preferred among these are organic acid esters and acid halides, particularly preferred are phthalic acid esters,
Cellosolve acetate and phthalic halide.

The amount of each of the above components may be arbitrary as long as the effects of the present invention are required.
The following range is preferred. The amount of the titanium compound used is 1 × in molar ratio with respect to the amount of the magnesium compound used.
It is good to be in the range of 10 ^{-4 to} 1000, preferably 0.01.
It is in the range of -10. When a compound for that purpose is used as a halogen source, the amount used is 1 × 10 5 in molar ratio with respect to the amount of magnesium used irrespective of whether the titanium compound and / or the magnesium compound contains halogen or not. ^It is better to be within the range of ^{-2 to} 1000,
Preferably it is in the range of 0.1-100.

The amount of the silicon, aluminum and boron compounds used is preferably in the range of 1 × 10 ^{−3 to} 100, preferably 0.01 to 0.01, in terms of a molar ratio with respect to the above-mentioned magnesium compound. Within the range of 1. The amount of the electron donating compound used is 1 × 10 ⁻³ to 1 in a molar ratio with respect to the amount of the magnesium compound.
It is preferably in the range of 0, preferably in the range of 0.01 to 5.

The component (i) is produced, for example, by the following production method using the above-mentioned titanium source, magnesium source and halogen source, and if necessary, other components such as an electron donor. (A) A method in which a magnesium halide is brought into contact with an electron donor, if necessary, and a titanium-containing compound. (B) A method in which alumina or magnesia is treated with a phosphorus halide compound, and a magnesium halide, an electron donor, and a titanium halide-containing compound are brought into contact therewith. (C) A method of contacting a titanium halide compound and / or a silicon halide compound with a solid component obtained by contacting a magnesium halide with a titanium tetraalkoxide and a specific polymer silicon compound. As the polymer silicon compound, a compound represented by the following formula is suitable. (Where R ² is a hydrocarbon residue having about 1 to 10 carbon atoms,
m indicates the degree of polymerization such that the viscosity of the polymer silicon compound becomes about 1 to 100 centistokes.) More specifically, methyl hydrogen polysiloxane, ethyl hydrogen polysiloxane, phenyl hydrogen polysiloxane, cyclohexyl hydrogen Polysiloxane, 1,3,5,7-tetramethylcyclotetrasiloxane, 1,3,5,7,9-pentamethylcyclopentasiloxane and the like are preferable.

(D) A method in which a magnesium compound is dissolved with a titanium tetraalkoxide and an electron donor, and the solid component precipitated with a halogenating agent or a titanium halide compound is brought into contact with the titanium compound. (E) A method in which an organomagnesium compound such as a Grignard reagent is allowed to act with a halogenating agent, a reducing agent, and the like, and then, if necessary, contacted with an electron donor and a titanium compound. (F) A method of contacting an alkoxymagnesium compound with a halogenating agent and / or a titanium compound in the presence or absence of an electron donor. Among these production methods, (c) and (d) are preferable.

Component (ii) Component (ii) used in the present invention is water and / or an alcohol and an inorganic halogen compound. Here, the “alcohol” includes one in which a hydroxyl group is directly bonded to an aromatic ring, that is, phenol (containing naphthol). The alcohol is typically a monohydric alcohol, but includes a dihydric or polyhydric alcohol.

Specific examples of the alcohol include (a) methanol, ethanol, isopropanol, propanol, n-butanol, isobutanol, sec butanol, tert-butanol, pentanol, hexanol, octanol, 2-ethylhexanol, dotecanol, octadecyl Alcohol, benzyl alcohol,
C1-C18 alcohols such as phenylethyl alcohol, cumyl alcohol, and isopropylbenzyl alcohol; and alkyl groups such as (b) phenol, cresol, xylenol, ethylphenol, propylphenol, cumylphenol, nonylphenol, and naphthol. And phenols having 6 to 25 carbon atoms which may be used.

As the inorganic halogen compound, any commonly known inorganic halogen compounds can be used. Representative compounds include, for example, lithium, sodium, potassium, beryllium, magnesium, calcium, strontium, barium, zirconium, chromium, molybdenum, tungsten, manganese, iron, cobalt, nickel, copper, zinc, boron, aluminum, indium And halogen compounds such as silicon, germanium, tin, lead, and phosphorus.

More specifically, LiCl, NaCl, K
Cl, NaBr, KBr, BeCl, MgCl ₂ , Ca
Cl ₂ , SrCl ₂ , BaCl ₂ , ZrCl ₄ , MoC
l ₃ , MoCl ₅ , CrCl ₃ , MnCl ₂ , FeCl
₂ , FeCl ₃ , FeBr ₂ , FeBr ₃ , CoC
l ₂ , CoBr ₂ , NiCl ₂ , NiBr ₂ , Ni
I ₂ , CuCl ₂ , CuCl, CuBr ₂ , ZnC
l ₂ , ZnI ₂ , AlCl ₃ , AlBr ₃ , AlI ₃ ,
BCl ₃ , BBr ₃ , GeCl ₂ , GeCl ₄ , SiC
l ₄ , WCl ₆ , HSiCl ₃ , SnCl ₂ , SnCl
₄ , PbCl ₂ , PbCl ₄ , InCl ₃ , PCl ₃ ,
PCl _{5 and the} like. Of these, halogen compounds such as aluminum, tandastene, and silicon are preferred.

The inorganic halogen compound in the present invention is typically a compound in which all the valences of halogenated elements are satisfied by halogens (different halogens), but are not necessarily limited to such compounds. Not something.
Examples of the substituent other than halogen include a = 0 group, a hydrocarbon residue, an amino group, an alkoxide group, and others.

The method of using the component (ii) is arbitrary as long as the effects of the present invention can be attained. For example, alcohol, water and an inorganic halogen compound can be used separately or in combination with alcohol and / or water. An inorganic halogen compound can be mixed and introduced into the polymerization system. The amount ratio of the alcohol and / or water to be used and the inorganic alcohol is in the range of 0.01 to 100 as a molar ratio of the inorganic halogen compound to the alcohol or water (the total amount when both are used). Well, preferably 0.1 to
It is within the range of 10.

Component (iii) Component (iii) used in the present invention is an aromatic vinyl or allyl. Typical examples of aromatic vinyl are styrene and styrene nucleus and / or side chain substituents, examples of which include alkyl and alkoxy, halogen, and the like. Another group of aromatic allyls of component (iii) includes, in addition to the basic allylbenzene, derivatives similar to the styrene derivatives described above. Two or more vinyl groups and allyl groups may be present.

Examples of suitable compounds as component (iii) include styrene, α-methylstyrene, β-methylstyrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, 2,4-dimethylstyrene, , 5-dimethylstyrene, 3,4-dimethylstyrene, 3,5-
Examples include dimethylstyrene, p-divinylbenzene, m-divinylbenzene, o-divinylbenzene, p-ethylstyrene, allylbenzene, ethylvinylbenzene, o-chlorostyrene, m-chlorostyrene, and p-chlorostyrene.

Production of Component (A) The contact conditions of the above-mentioned components (i) to (iii) can be any conditions as long as the effects of the present invention are recognized, but generally, the following conditions are satisfied. preferable. The contact temperature is -50 to 20
The temperature is about 0 ° C, preferably 0 to 100 ° C, and more preferably 20 to 50 ° C. Examples of the contact method include a mechanical method using a rotary ball mill, a vibration mill, a jet mill, a medium stirring / pulverizing machine, and a method of bringing into contact by stirring in the presence of an inert diluent. Inert diluents used at this time include aliphatic or aromatic hydrocarbons and halohydrocarbons, polysiloxanes and the like.

In the production of component (A) in the present invention, component (i) is brought into contact with component (iii) in the presence of component (ii) to prepolymerize component (iii).

The ratio of the components (i) to (iii) can be arbitrary as long as the effect of the present invention is recognized, but generally the following range is preferred. The quantitative ratio of component (i) to component (ii) is the same as component (ii) with respect to the titanium component constituting component (i).
In a molar ratio of 0.01 to 1000, preferably 0.1 to 1
00 is within the range. The amount of component (iii) used is the same as component (i)
Weight ratio (component (iii) / component (i)) to 0.01 to 1
00, preferably in the range of 0.1 to 30.

Component (B) Component (B) is an organoaluminum compound. Specific ^{examples, R} _{3 3-p} AlX p _{^{or, R 4 3-q Al (}} O
R ⁵ ) _q (where R ³ and R ⁴ may be the same or different and each may be a hydrocarbon residue or hydrogen atom having about 1 to 20 carbon atoms, R ⁵ may be a hydrocarbon residue having about 1 to 20 carbon atoms, X Is halogen, p and q are respectively 0 ≦ p <3, 0 <q <3
Is the number of ). In particular,
(A) Trialkylaluminum such as trimethylaluminum, triethylaluminum, triisobutylaluminum, trihexylaluminum, trioctylaluminum, tridecylaluminum, etc., (ii) diethylaluminum monochloride, diisobutylaluminum monochloride, ethylaluminum sesquichloride, ethyl Alkyl aluminum halides such as aluminum dichloride; alkyl aluminum hydrides such as (c) diethyl aluminum hydride and diisobutyl aluminum hydride; and aluminum alkoxides such as (d) diethyl aluminum ethoxide and diethyl aluminum phenoxide.

[0036] These (a) to other organometallic compound with an organoaluminum compound (c), for example ^{R 6} _3-r Al
(OR ⁷ ) _r (where 1 ≦ r ≦ 3, R ⁶ and R
⁷ is a hydrocarbon residue having about 1 to 20 carbon atoms which may be the same or different. )) Can also be used in combination. For example,
Combination of triethylaluminum and diethylaluminum ethoxide, combination of diethylaluminum monochloride and diethylaluminum ethoxide, combination of ethylaluminum dichloride and ethylaluminum diethoxide, combination of triethylaluminum, diethylaluminum ethoxide and diethylaluminum chloride Is raised. The amount of the component (B) used is such that the ratio of the component (B) / the component (A) is 0.1 to 1000, preferably 1 to 100 by weight.

[Use of Catalyst / Polymerization] The catalyst according to the present invention can be applied not only to ordinary slurry polymerization but also to liquid phase solventless polymerization, solution polymerization, or gas phase It is also applied to the polymerization method. Further, the present invention is also applicable to a system in which continuous polymerization, batch polymerization or preliminary polymerization is performed. As a polymerization solvent in the case of slurry polymerization, hexane, heptane, pentane, cyclohexane, benzene,
A single or mixture of a saturated aliphatic or aromatic hydrocarbon such as toluene is used. Polymerization temperature from room temperature to 200
C., preferably 50 to 150 ° C., and the polymerization pressure is atmospheric pressure to about 300 kg / cm ² , preferably atmospheric pressure to 50 kg / cm ^2.
kg / cm ² , and hydrogen can be additionally used as a molecular weight regulator at that time.

In order to control the stereoregularity of the obtained polymer, a known ester as a third component at the time of polymerization may be used.
Electron-donating compounds such as ethers and amines can also be used. In the case of slurry polymerization, the use amount of the component (A) is preferably in the range of 0.001 to 0.1 g, and the component (A) / liter of the solvent.

The α-olefins to be polymerized by the catalyst system of the present invention have the general formula R—CH ＝ CH ₂ (where R is a hydrogen atom,
Alternatively, it is a hydrocarbon residue having 1 to 10 carbon atoms and may have a branched group. ). Specifically, ethylene, propylene, butene-1, pentene-
There are olefins such as 1, hexene-1,4-methylpentene-1. Preferred are ethylene and propylene. In addition to the homopolymerization of these α-olefins, copolymerizations, for example up to 50% by weight, preferably up to 20% by weight thereof, of the above-mentioned olefins can be carried out, and 30% by weight relative to propylene. Copolymerization with up to percent of the above olefins, especially ethylene, can be performed. Copolymerization with other copolymerizable monomers (eg, vinyl acetate, diolefin, etc.) can also be performed.

In the case of producing a propylene block copolymer by a method using substantially no solvent with the catalyst according to the present invention, the polymerization method comprises at least two steps, step (1) and step (2).

Polymerization Step (1) In the polymerization step (1), propylene alone or a propylene / ethylene mixture is supplied to a polymerization system having the above-mentioned catalyst components (A) and (B) and polymerized in one or more stages. Propylene homopolymer or ethylene content 7% by weight
This is a step of forming an amount corresponding to 20 to 70% by weight of the total polymerization amount of the propylene / ethylene copolymer, preferably 0.5% by weight or less.

When the ethylene content in the propylene / ethylene copolymer exceeds 7% by weight in the polymerization step (1), the bulk density of the final copolymer decreases, and the amount of low-crystalline polymer by-produced significantly. Increase. On the other hand, when the polymerization ratio is less than the lower limit of the above range, the amount of by-product of the low crystalline polymer also increases.

The polymerization temperature in the polymerization step (1) is 30 to 12
0 ° C., preferably 50 to 95 ° C., and the polymerization pressure is usually in the range of 1 to 50 kg / cm ² G. In the polymerization step (1), M is adjusted using a molecular weight modifier such as hydrogen.
It is preferable to control the FR to increase the fluidity of the final copolymer during melting.

Polymerization Step (2) In the polymerization step (2), the propylene / ethylene mixture is polymerized in one or more stages, and the polymerization ratio (weight ratio) of propylene / ethylene is 80/20 to 20/80. This is a step of forming a rubbery copolymer of propylene (however, the amount of polymerization in this step is an amount corresponding to 30 to 80% by weight of the total amount of polymerization).

In the polymerization step (2), other comonomers may coexist. For example, α-olefins such as 1-butene, 1-pentene and 1-hexene can be used. The polymerization temperature in the polymerization step (2) is 30 to 90 ° C,
Preferably, it is about 50 to 80 ° C. The polymerization pressure is 1
A range of ５０50 kg / cm ² G is usually used. When the process proceeds from the polymerization step (1) to the polymerization step (2), it is preferable to purge the propylene gas or the propylene / ethylene mixed gas and the hydrogen gas and then proceed to the next step. Polymerization step (2)
The molecular weight regulator may or may not be used depending on the purpose.

Polymerization Mode The process for producing the copolymer according to the present invention can be carried out by any of batch, continuous and semi-batch processes. At this time, there are a method of performing polymerization using the monomer itself as a medium, a method of performing polymerization in a gaseous monomer without using a medium, and a method of performing polymerization by combining these. .

[0047]

EXAMPLE 1 Production of Component (A) 200 ml of dehydrated and deoxygenated n-heptane was introduced into a flask sufficiently purged with nitrogen, and then 0.4 mol of MgCl ₂ and Ti ( _On) were added.
0.8 mol of C ₄ H ₉ ) ₄ was introduced and reacted at 95 ° C. for 2 hours. After completion of the reaction, the temperature was lowered to 40 ° C., and then 48 ml of methylhydropolysiloxane (of 20 centistokes) was introduced and reacted for 3 hours. The resulting solid component was washed with n-heptane.

Then, 50 ml of n-heptane purified in the same manner as described above was introduced into a flask sufficiently purged with nitrogen, and the solid component synthesized as above was converted to 0.24 in terms of Mg atom.
Mole was introduced. Then, 0.4 mol of SiCl ₄ was mixed with 25 ml of n-heptane, introduced into the flask at 30 ° C. for 30 minutes, and reacted at 90 ° C. for 3 hours. After the completion of the reaction, the resultant was washed with n-heptane. Then n-heptane 2
0.024 mol of phthalic acid chloride was mixed with 5 ml, and introduced into the flask at 70 ° C. for 30 minutes.
The reaction was carried out at a temperature of 1 hour. After the completion of the reaction, the resultant was washed with n-heptane to obtain component (i). The titanium content in the resulting solid is
2.18 weight percent.

Next, 50 ml of fully purified n-heptane was introduced into a flask sufficiently purged with nitrogen, and then 5 g of the solid component obtained above was introduced.
10 ml of iCl ₄ was introduced and contacted at 90 ° C. for 2 hours. After the contact was completed, the resultant was sufficiently washed with n-heptane to obtain a component (i).

Next, 12 g of metadivinylbenzene was introduced as the component (iii), and AlCl ₃ was used as the component (ii).
0.5 gram and 0.2 ml of n-butanol were introduced and contacted at 30 ° C. for 2 hours. After the end of contact, n
-Washed thoroughly with heptane to obtain component (A). When a part was taken out and the amount of the prepolymerized component (iii) was examined,
1.89 gram component (iii) / gram component (i).

[Polymerization polymerization] In a 1.5-liter stainless steel autoclave having a stirring and temperature control device, 500 ml of sufficiently dehydrated and deoxygenated n-heptane, and triethylaluminum 125 as a component (B), were added. Milligram and 19.5 mg of diisopropyldimethoxysilane as the third component were introduced, the temperature was raised to 75 ° C., 60 ml of hydrogen was introduced, and the pressure was increased to 5 kg / cm ² G with propylene. Next, the component (A) (15 mg in terms of the weight of the component (i)) was introduced into the polymerization tank with propylene. Thereafter, polymerization pressure = 5 kg / cm ² G, polymerization temperature = 75 ° C., polymerization time = 2
Polymerization was carried out under the conditions of time. After completion of the polymerization, the obtained polymer slurry was separated by filtration, and the polymer was dried. As a result, 199.4 g of a polymer was obtained. Also, 0.53 g of polymer was obtained from the filtrate. From the boiling heptane extraction test, all products I.I. I (hereinafter,
TI. I) is 98.9 weight percent, MF
R = 1.8 g / 10 min, polymer bulk specific gravity = 0.41 g /
It was cc.

Example 2 Production of Component (A) 200 ml of dehydrated and deoxygenated n-heptane was introduced into a flask sufficiently purged with nitrogen, and then 0.4 mol of MgCl ₂ and Ti ( _On) were added.
0.8 mol of C ₄ H ₉ ) ₄ was introduced and reacted at 95 ° C. for 2 hours. After the reaction was completed, the temperature was lowered to 40 ° C.
60 ml of 3,5,7,9 pentamethylcyclopentasiloxane was introduced and reacted for 3 hours. The resulting solid component was washed with n-heptane.

Next, 50 ml of n-heptane purified in the same manner as described above was introduced into a flask sufficiently purged with nitrogen, and the solid component synthesized as above was converted to 0.24 in terms of Mg atoms.
Mole was introduced. Next, 0.8 mol of SiCl ₄ was mixed with 25 ml of n-heptane, introduced into the flask at 30 ° C. for 30 minutes, and reacted at 90 ° C. for 3 hours. After the reaction was completed, the solid was washed with n-heptane to obtain a solid component.

Next, 50 ml of sufficiently purified n-heptane was introduced into a flask sufficiently purged with nitrogen, and then 5 g of the solid component obtained above was introduced.
0.7 g of ₁₆ was introduced and contacted at 70 ° C. for 2 hours. After the contact is completed, the components are thoroughly washed with n-heptane, and
(i). Subsequently, 0.4 g of AlCl ₃ and 0.3 ml of ethanol were introduced as the component (ii), and 10 g of styrene was further introduced as the component (iii).
It was contacted at 40 ° C. for 3 hours, and after completion of the contact, it was sufficiently washed with n-heptane to obtain Component (A). In addition, component (iii)
Was 1.03 g component (iii) / g component (i).

[Polymerization of Propylene] The polymerization was carried out in exactly the same manner as in Example 1, except that 18 mg of t-butylmethyldimethoxysilane was used instead of cyclohexylmethyldimethoxysilane. As a result, 141.7 g of a polymer was obtained, and T.I.
I = 97.8% by weight, MFR = 2.3 g / 10 min, bulk specific gravity = 0.42 g / cc.

Examples 3 to 5 In the preparation of the component (A) of Example 1, the components were prepared in exactly the same manner except that the types of the components (ii) and (iii) were the compounds shown in Table 1. The polymerization was carried out in exactly the same manner. Table 1 shows the results.

Comparative Example 1 In the production of the component (A) of Example 1, the component (A) was produced in exactly the same manner except that the metadivinylbenzene of the component (iii) was not used. The same was done. As a result, 96.3 grams of a polymer was obtained. The TI. I = 97.1% by weight, M
FR = 4.4 g / 10 minutes, polymer bulk specific gravity = 0.31 g
/ Cc.

Example 6 [ Preparation of Component (A)] In the preparation of Component (A) in Example 1, the amount of metadivinylbenzene used as Component (iii) was changed to 2
Production was carried out in exactly the same manner except that the amount was 0 g. The prepolymerization amount was 2.9 grams component (iii) / gram component (i)
Met.

[Copolymerization of propylene] JP-B-61-33
No. 721, propylene was copolymerized using a horizontal biaxial gas-phase polymerization tank having an internal volume of 13 liters. After replacing the inside of the polymerization tank with nitrogen which has been sufficiently purified, the polymer carrier which has been sufficiently dehydrated and deoxygenated is replaced with 4 parts.
00 grams were added. Next, 500 mg of triethylaluminum of the component (B), 108 mg of t-butylmethyldimethoxysilane, and 120 mg of the component (A) synthesized above were introduced. In the first stage polymerization step (1), after introducing 1000 ml of hydrogen, the temperature was increased to 75 ° C., and propylene was 1.3 g / g.
Min was introduced at a constant speed. In addition, the stirring rotation speed of the polymerization tank is 3
It was 50 rpm. The polymerization temperature was maintained at 75 ° C., and after 3 hours and 30 minutes, the introduction of propylene was stopped. The polymerization was continued at 75 ° C., and when the polymerization pressure reached 1 kg / cm ² G, a part of the polymerization sample was collected.

[0060] Then, of _{H 2} was added 500 ml, was initiated polymerization step (2). In the second stage polymerization, propylene was introduced at a constant rate of 0.59 g / min and ethylene was introduced at a constant rate of 0.40 g / min at 70 ° C. for 1 hour and 50 minutes. The introduction of propylene and ethylene was stopped, and residual pressure polymerization was performed until the polymerization pressure reached 1 kg / cm ² G. After the completion of the polymerization, purging was performed to take out the polymer. 384 grams of polymer were obtained. The MFR of the resulting polymer is 6.1 g / 10
Min and the polymer bulk density (BD) is 0.46 (g
/ Cc), and the polymer falling speed was 4.8 seconds.
The weight of the rubbery copolymer was 29.8 weight percent. The polymerization tank had no polymer adhesion, and the MFR of the intermediate sample was 17.1 g / 10 minutes. The polymer falling speed means the time required for 50 grams of polymer to fall.

Comparative Example 2 Using the component (A) produced in Comparative Example 1, propylene was copolymerized exactly in the same manner as in Example 6. as a result,
377 grams of polymer are obtained, which have an MFR =
7.9 g / 10 min, polymer bulk density = 0.26 (g / c
c), polymer falling speed = does not fall, weight of rubbery copolymer = 29.8% by weight. A large amount of polymer adhesion was observed in the polymerization tank.

[0062]

The catalyst for olefin polymerization according to the present invention comprises:
Even without performing the pre-polymerization required for conventional catalysts, it is possible to obtain a polymer with high activity and high stereoregularity in a state of good powder properties, and even when performing the pre-polymerization It has the advantage that prepolymerization can be performed without using an organometallic compound that has been conventionally required.Therefore, problems associated with prepolymerization using an organometallic compound, such as reduction in catalytic activity and Deterioration of catalyst properties can be solved as described in the section of "Means for Solving the Invention".

[Table 1]

[Brief description of the drawings]

FIG. 1 is to assist in understanding the technical contents of the present invention relating to a Ziegler catalyst.

Claims (1)

(57) [Claims] 1. An olefin polymerization catalyst comprising the following components (A) and (B). Component (A) is composed of the following component (i), component (ii) and component (iii). Component (iii) is prepared by contacting component (i) with component (iii) in the presence of component (ii). A contact product obtained by polymerization, wherein the polymerization amount of component (iii) is 0.0% per gram of component (i).
Solid catalyst component in the range of 1 to 10 grams. Component (i) a Ziegler-type catalyst component containing titanium, magnesium and halogen as essential components, component (ii) alcohol and / or water, and an inorganic halogen compound, component (iii) aromatic vinyl or allyl, component (B) ) Organoaluminum compounds.