JPH04117411A - Production of poly-alpha-olefin - Google Patents

Abstract

PURPOSE:To produce a poly-alpha-olefin of a broad molecular weight distribution in improved yields by polymerizing an alpha-olefin in the presence of a specified catalyst. CONSTITUTION:A mixture (A) is obtained by mixing 10-90mol% dimethoxysilane compound of formula I (wherein R<1> is 1-10C hydrocarbyl, OR<3>, SiR<4>3, or OSiR<5>3; R<2> is 10C hydrocarbyl or SiR<6>3, and R<3> to R are each 1-10C hydro-carbyl) with 90-10mol% alkoxysilane compound of formula II (wherein R<7> is 2-10C hydrocarbyl or SiR<1>3; R<8> is 1-10C hydrocarbyl or SiR<12>3; and R<9> to R<12> are each 1-10C hydrocarbyl). A polymerization catalyst (B) is obtained by mixing a solid catalyst component (a) essentially consisting of Mg, Ti, halogen and an electron donor with 1-2000g-mol, per g-atom of Ti in component (a), of an organometallic compound (b) and 0.001-10mol, per mol of component (b), of the above mixture (A). An alpha-olefin is polymerized at -80 to 150 deg.C under a pressure of 1-60atm in the presence of component B.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a method for producing polyα-olefin.

Prior Art When producing polyα-olefins using catalyst components containing magnesium, titanium, chlorine and electron-donating compounds, they contain 5i-0-C bonds together with organoaluminum compounds, or the general formula % formula % organic It is known that the use of silicon compounds improves the stereoregularity of the resulting polymer (for example,
No. 4-94690, No. 56-36203, No. 57-6
No. 3310, No. 58-83016, No. 62-1170
5 etc.).

Polymers obtained using the organosilicon compounds described in the above-mentioned publications generally have a narrow molecular weight distribution.

Problems to be Solved by the Invention By widening the molecular weight distribution of a polymer, the rigidity, fluidity, processability, etc. of the polymer can be improved.

As a method for widening the molecular weight distribution of a polymer, a method using a plurality of polymerization vessels having different polymerization conditions, so-called multistage polymerization, is generally performed.

However, when a multi-stage polymerization method is adopted, the process becomes complicated, the cost of the polymer increases, and the polymerization activity of the polymerization catalyst decreases.

An object of the present invention is to provide a method capable of producing a poly-alpha-olefin with a wide molecular weight distribution in high yield in one stage.

Means for Solving the Problems As a result of extensive research, the present inventors discovered that the object of the present invention can be achieved by using a polymerization catalyst that uses two specific organosilicon compounds in combination. invention has been achieved.

In other words, the present invention consists of (A) a solid catalyst component containing magnesium, titanium, halogen, and an electron-donating compound as essential components, (B) an organometallic compound, and (C) a general formula [where R1 is carbon Several 1 to 10 hydrocarbon groups, 0R3
SiR'3 or O3+R5s, R2 has 1 or more carbon atoms
10 hydrocarbon groups or 5iR63, R3,
R4, R5 and R6 each represent a hydrocarbon group having 1 to 10 carbon atoms. ] Dimethoxysilane compound and (b) General formula % Formula % [However, R7 is a hydrocarbon group having 2 to 10 carbon atoms or SiR"s, and R" is a hydrocarbon group having 1 to 10 carbon atoms or SIR" 3, R9 and ft1D are the same or different hydrocarbon groups having 1 to 10 carbon atoms, and R11 and R1
2 represents a hydrocarbon group having 1 to 10 carbon atoms. ] A method for producing a poly-α-olefin, which comprises polymerizing an α-olefin in the presence of a polymerization catalyst comprising an alkoxysilane compound.

Solid catalyst component The solid catalyst component (hereinafter referred to as component A), which is one component of the polymerization catalyst used in the present invention, is composed of magnesium, titanium,
A halogen and an electron-donating compound are essential components, but such components usually include a magnesium compound, a titanium compound, an electron-donating compound, and if each of the above compounds does not have a halogen, a halogen-containing compound, respectively. Prepared by contacting.

(1) Magnesium Compound A magnesium compound is represented by the general formula MgR'R2. In the formula, R1 and R2 represent the same or different hydrocarbon group, OR group (R is a hydrocarbon group), or a halogen atom.

More specifically, as the hydrocarbon group for R1 and R2, an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group, an aryl group, or an aralkyl group, and as an OR group, R has 1 to 12 carbon atoms. The alkyl group, cycloalkyl group, aryl group, and aralkyl group are halogen atoms such as chlorine,
These include bromine, iodine, and fluorine.

Specific examples of these compounds are shown below, and in the chemical formula, Me = methyl, Bt = ethyl, Pr: probyl, Bu
Nibutyl, He: hexyl, Oat: octyl, Ph
: phenyl, cyHe: cyclohexyl, respectively.

MgMe2. MgEt2. Mg1-Prz, M
gBu2. MgHe2Mg[1ct2. MgBtB
u, MgPL, MgcyHe2゜Mg(OMe
)z, Mg(OBt)2. Mg(OBu)2.
Mg(OHe)a.

Mg((]0ct)z, Mg(OPh)2.Mg
(OcyHe)2゜BtMgCl, BuMgCl
, HeMgC1, 1-BuJCl, t-BuMg
Cl, PhMgC1, PhCH2MgCl, B
tMgBr.

BuMgBr, PhMgBr, BuMgI,
BtOMgCI.

BuOMgCI, )IeOMgCI, Ph0M
gCl, BtOMgBr.

BuOMgBr, BtOMgl, MgC1z
, MgBr2. Mg12° The above magnesium compound can also be prepared from metallic magnesium or other magnesium compounds when preparing component A.

Examples include metallic magnesium, halogenated hydrocarbons, and alkoxy group-containing compounds of the general formula Hydrogen group, M is boron, carbon, aluminum, silicon or phosphorus atom, R is carbon number 1-20
m represents the valence of M, m>n≧0. ] is mentioned. As the hydrocarbon groups of X and R in the general formula of the alkoxy group-containing compound,
Methyl (Me) Ethyl (Bt), Propyl (Pr
), i-propyl (1-Pr) butyl (Bu) 1-
Alkyl groups such as butyl (1-Bu) hexyl (He) octyl (0ct), cyclohexyl (cyHe
) Cycloalkyl groups such as methylcyclohexyl, alkenyl groups such as allyl, propenyl, butenyl, phenyl (Ph) To! J, aryl group of xylyl group,
Examples include aralkyl such as phenethyl and 3-phenylpropyl.

Among these, alkyl groups having 1 to 10 carbon atoms are particularly desirable. Specific examples of alkoxy group-containing compounds are listed below.

C(OMe) contained in the compound formula C(OR) when 0M is carbon.4. C(O
Bt)i.

C(OPr) 4 , C(OBu) a , [:
(Old-BU)4, C(OHe)4゜C(OOct)
i' 2 HC (DMe) contained in XC (OR)3
)! +HC(OBt)a, )Ic(OPr)s
, HC(OBLI)3, IC(0)1e)+.

t(C(DPh)3; MeC(OMe)3.MeC
(OBtL, BtC(OMe)s.

BtC(OBt)3, cyHeC(OBt)*
, PhC(OMe)3.

PhC(01Et)3, CH2CIC(OEt)3
, MeCHBrC(OBt)a.

MeC)IcIc(OBtL; CIC(OMe
)3, CIC(OBt)a.

CIC(Di-Bu)s, BrC(OBt)s;
MeCH(OMe)2 contained in formula X2C(OR)2.
MeCH(OBt)2. CHz(OMe)z.

CL(OBt)z, CLCICH(01Et)
z, [:HCl2CH (mouth Bt) 2CC1s
CH(OBt)2, CH2CICH(OBt)z, P
hCH(OBt)2.

St (OMe) included in the compound formula 5i(OR)= when 0M is silicon.
St (OEt) 4゜3i(OBu)a, 5
i(Di-Bu)< , 5i(OHe)4°St(D
Oct) < , 5i(OPh14' Formula XSi (
OR) H3i contained in s (OBtL, H3i
(OBu)s, 1lsi(OHe)s.

H3i(OPh)s; MeSi(OMe)s,
MeSi(OBt)+.

MeSi(OBu)s, BtSi(OBt)3.
Ph5i(OBt)s.

BtSi(OPh)s; CISiCl5i(O,C
l5i(OBt)s.

Cl5i(OBu)s, Cl5i(OPh)a,
Br5i(OBt)s; Formula% Formula%) B(OBt)s, B contained in compound 2B (OR) 3 when 0M is boron
(OBu)s.

B (OHe) s , B (OPh)-0■^1(OMeL,^1() contained in the compound formula AI(OR)3 when M is aluminum
OBtL.

^1(OPrL, AI(Di-Pr)s, AI
(OBu)s.

^1 (Ot-Bu) s , ^1 (OHe) a ,
AI(OPh)a.

P(OMe)a, P contained in compound 2P (OR) 3 when 0M is phosphorus
(OBt)s.

P (OBu) s , P (OHe) s , P
(OPh) s.

Further, as the magnesium compound, a complex with an organic compound of a metal (M) of Group 1 or Group 1IIa of the periodic table can also be used. The complex has the general formula MgR'R2.n(MR
3,). The metal includes aluminum,
Zinc, calcium, etc., and R3 is an alkyl group, cycloalkyl group, aryl group, or aralkyl group having 1 to 12 carbon atoms.

Further, m represents the valence of the metal M, and n represents a number from 0.1 to 10. As a specific example of a compound represented by "MR",
1Mes, ^IEts, A11-Bu3. Al
Ph3゜ZnMez, 2nBtz, ZnBua
, ZnPhz, CaBt2°[:aPh2, etc.].

(2) Titanium compounds Titanium compounds are divalent, trivalent, and tetravalent titanium compounds, and examples thereof include titanium tetrachloride, titanium tetrabromide, trichloroethoxytitanium, trichlorobutoxytitanium, and dichlorjetoxytitanium. , dichlordibutoxytitanium, dichlordiphenoxytitanium, chlortriethoxytitanium, chlortributoxytitanium, tetrabutoxytitanium, titanium trichloride, and the like. Among these, tetravalent titanium halides such as titanium tetrachloride, trichlorethoxytitanium, dichlorodibutoxytitanium, and dichlordiphenoxytitanium are preferred, and titanium tetrachloride is particularly preferred.

(3) Electron-donating compounds Examples of electron-donating compounds include carboxylic acids, carboxylic anhydrides, carboxylic esters, carboxylic acid halides, alcohols, ethers, ketones, amines,
Examples include amides, nitriles, aldehydes, alcoholates, phosphorus, arsenic and antimony compounds bonded to organic groups via carbon or oxygen, phosphoamides, thioethers, thioesters, carbonic esters and the like.

Among these, carboxylic acids, carboxylic anhydrides, carboxylic esters, carboxylic halides, alcohols, and ethers are preferably used.

Specific examples of carboxylic acids include aliphatic monocarboxylic acids such as formic acid, acetic acid, propionic acid, butyric acid, isobutyric acid, valeric acid, caproic acid, pivalic acid, acrylic acid, methacrylic acid, and crotonic acid, malonic acid, and succinic acid. , aliphatic dicarboxylic acids such as glutaric acid, adipic acid, sebacic acid, maleic acid, fumaric acid, aliphatic oxycarboxylic acids such as tartaric acid, cyclohexane monocarboxylic acid, cyclohexene monocarboxylic acid, cis-1,2-cyclohexanedicarboxylic acid ,
Alicyclic carboxylic acids such as cis-4-methylcyclohexene-1,2-dicarboxylic acid, aromatic monomers such as benzoic acid, toluic acid, anisic acid, p-tert-butylbenzoic acid, naphthoic acid, and cinnamic acid. Examples include aromatic polycarboxylic acids such as carboxylic acid, phthalic acid, isophthalic acid, terephthalic acid, naphthalic acid, trimellidic acid, hemimellitic acid, trimesic acid, pyromellitic acid, and mellitic acid.

As the carboxylic acid anhydride, acid anhydrides of the above-mentioned carboxylic acids can be used.

As the carboxylic acid ester, mono- or polyvalent esters of the above-mentioned carboxylic acids can be used, and specific examples thereof include butyl formate, ethyl acetate, butyl acetate, isobutyl isobutyrate, propyl pivalate, isobutyl pivalate, acrylic. Ethyl acid, methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, diethyl malonate, diisobutyl malonate, diethyl succinate, dibutyl succinate, diisobutyl succinate, diethyl glutarate, dibutyl glutarate, diisobutyl glutarate,
Diisobutyl adipate, dibutyl sebacate, diisobutyl sebacate, diethyl maleate, dibutyl maleate, diisobutyl maleate, monomethyl fumarate, diethyl fumarate, diisobutyl fumarate, diethyl tartrate, dibutyl tartrate, diisobutyl tartrate, ethyl cyclohexanecarboxylate, Methyl benzoate, ethyl benzoate, methyl p-)rulyate, ethyl p-tert-butylbenzoate, ethyl p-anisate, ethyl α-naphthoate, isobutyl α-naphthoate, ethyl cinnamate, phthalic acid Monomethyl, monobutyl phthalate, dibutyl phthalate, diisobutyl phthalate, dihexyl phthalate, dioctyl phthalate, di-2-ethylhexyl phthalate, diallyl phthalate, diphenyl phthalate, diethyl isophthalate, diisobutyl isophthalate, diethyl terephthalate, terephthalate Dibutyl acid, diethyl naphthalate, dibutyl naphthalate, triethyl trimellitate, tributyl trimellidate, tetramethyl pyromellitate, tetraethyl pyromellitate, tetrabutyl pyromellitate, and the like.

As the carboxylic acid halide, acid halides of the above-mentioned carboxylic acids can be used, and specific examples thereof include acetic acid chloride, acetic acid bromide, acetic acid iodide, propionic acid chloride, butyric acid chloride, butyric acid chloride, butyric acid bromide, butyric acid iodide, and pivalin. Acid chloride, pivalic acid bromide, acrylic acid chloride, acrylic acid bromide,
Acrylic acid iodide, methacrylic acid chloride, methacrylic acid iodide, methacrylic acid iodide, crotonic acid chloride, malonic acid chloride, malonic acid promide,
Succinic acid chloride, succinic acid bromide, glutaric acid chloride, glutaric acid bromide, adivic acid chloride, adipic acid bromide, sebacic acid chloride, sebacic acid chloride, maleic acid chloride, maleic acid bromide, fumaric acid chloride, fumaric acid bromide, tartaric acid Chloride, tartaric acid bromide, cyclohexanecarboxylic acid chloride, cyclohexanecarboxylic acid bromide, 1-cyclohexenecarboxylic acid chloride, cis-4-methylcyclohexenecarboxylic acid chloride, cis-4-methylcyclohexenecarboxylic acid chloride, benzoyl chloride, benzoyl bromide, p -) toluylic acid chloride, p-toluylic acid bromide,
p-Anisyl chloride, p-anisyl bromide, α-naphthoic acid chloride, cinnamic acid chloride, cinnamic acid bromide, phthalic acid dichloride, phthalic acid dibromide, isophthalic acid dichloride, isophthalic acid dibromide, terephthalic acid dichloride, naphthalic acid Dichloride is mentioned.

Monoalkyl halides of dicarboxylic acids such as monomethyl adipate chloride, monoethyl maleate chloride, monomethyl maleate, and butyl phthalate chloride may also be used.

Alcohols are represented by the general formula ROH.

In the formula, R is alkyl, alkenyl, cycloalkyl, aryl, or aralkyl having 1 to 12 carbon atoms.

Specific examples include methanol, ethanol, propatool, isoproptool, butanol, isobutanol, pentanol, hexanol, octatool, 2-
These include ethylhexanol, cyclohexanol, benzyl alcohol, allyl alcohol, phenol, cresol, xylenol, ethylphenol, isopropylphenol, p-tert-butylphenol, n-octylphenol, and the like. Ethers have the general formula ROR
' In the formula, R and R' have 1 to 12 carbon atoms.
alkyl, alkenyl, cycloalkyl, aryl, aralkyl, and R and 11 may be the same or different. Specific examples include diethyl ether, diisopropyl ether, dibutyl ether, diisobutyl ether, diisoamyl ether, di-2-ethylhexyl ether, diallyl ether, ethyl allyl ether, butyl allyl ether, diphenyl ether, anisole, ethylphenyl ether, and the like.

As for the preparation method of component A, ■ a magnesium compound (component 1), a titanium compound (component 2) and an electron-donating compound (
Component 3) is contacted in that order. (2) After component 1 and component 3 are brought into contact, component 2 is brought into contact. ■Ingredients 1. Ingredient 2
A method such as bringing Component 3 and Component 3 into contact at the same time can be adopted.

It is also possible to contact with a halogen-containing compound before contacting with component 2.

Examples of the halogen-containing compound include halogenated hydrocarbons, halogen-containing alcohols, halogenated silicon compounds having a hydrogen-silicon bond, and halides of elements of group 1 [a, IVa, and Va of the periodic table (hereinafter referred to as metal halides). ) etc.

Examples of halogenated hydrocarbons include mono- and polyhalogen-substituted saturated or unsaturated aliphatic, alicyclic and aromatic hydrocarbons having 1 to 12 carbon atoms. Specific examples of these compounds include methyl chloride, methyl bromide, methyl iodide, methylene chloride, methylene bromide, methylene iodide, chloroform, bromoform, iodoform, carbon tetrachloride, carbon tetrabromide, legalized carbon, ethyl chloride, ethyl bromide, ethyl iodide, 1.2-dichloroethane, 1.2-dibromoethane, 1.2-short ethane,
Methyl chloroform, methyl bromoform, methyl iodoform, 1.1.2-) dichloroethylene, 1.1.
2-) Libromoethylene, 1,1.2°2-tetrachloroethylene, pentachloroethane, hexachloroethane, hexabromoethane, n-propyl chloride, 1.
2-dichloropropane, hexachloropropylene, octachloropropane, decabromobutane, and chlorinated paraffins; alicyclic compounds such as chlorocyclopropane, tetrachlorocyclopentane, hexachlorocyclopentadiene, and hexachlorocyclohexane; Examples include benzene, bromobenzene, 0-dichlorobenzene, p-dichlorobenzene, hexachlorobenzene, hexabromobenzene, pencitrichloride, p-chloropencitrichloride, and the like. Not only one kind but also two or more kinds of these compounds may be used.

A halogen-containing alcohol refers to a compound in which one or more hydrogen atoms other than the hydroxyl group in a mono- or polyhydric alcohol having one or more hydroxyl groups in the molecule are substituted with a halogen atom. do. Examples of the halogen atom include chlorine, bromine, iodine, and fluorine atoms, with chlorine atoms being preferred.

Examples of these compounds include 2-chloroethanol, 1
-Chlor-2-propatol, 3-chlor-1-propatol, 1-chloro-2methyl-2-propatol, 4
-Chlor-1-butanol, 5-chloro-1-pentanol, 6-chloro-1-hexanol, 3-chloro1.2
-propanediol, 2-chlorocyclohexanol,
4-Chlorbenzhydrol, (m, o, p)-chlorobenzyl alcohol, 4-chlorocatechol, 4-
Chloro-(m,o)-cresol, 6-chloro-(m,
o)-Cresol, 4-chloro-3,5-dimethylphenol, chlorohydroquinone, 2-benzyl-4-chlorophenol, 4-chloro-1-naphthol, (m,
o,p)-Chlorphenol, p-chloro-α-methylbenzyl alcohol, 2-chloro-4-phenylphenol, 6-chlorthymol, 4-chlorresorcin, 2
-bromoethanol, 3-bromo-1-propertool,
1-bromo-2-propertool, 1-bromo-2-butanol, 2-bromo-p-cresol, 1-bromo-2
-naphthol, 6-bromo-2-naphthol, (m, o
, p)-bromophenol, 4-bromoresorcin, (
m, o, p) Fluorophenol, p-iodophenol = 2゜2-dichloroethanol, 2,3-dichloro-1
-Propertool, 1,3-dichloro-2-propertool, 3-chloro-1-(α-chloromethyl)-1-propertool, 2,3-dibromo-1-propertool, 1,3
-dibromo-2propanol, 2.4-dibromophenol, 2.4-dibromo-1-naphthol = 2.22-
Trichloroethanol, 1,1.1-trichlor-2-
propatool, β, β, β-trichloro-tert-butanol, 2.3.4-) dichlorophenol, 2,4
．． 5-) dichlorophenol, 2.4.6-trichlorophenol, 2.4.6-) ribromphenol, 2,
3゜5-tribromo-2-hydroxytoluene, 2゜3
．． 5-)! J bromo-4-hydroxytoluene, 2.2
．． 2-) Refluoroethanol, α, α.

α-Trifluoro-m-cresol, 2.4゜6-dolyiodphenol: 2,3,4.6 Tetrachlorophenol, Tetrachlorohydroquinone, Tetrachlorbisphenol A%7 Trabromobisphenol A, 2,2
, 3.3-tetrafluoro-1-propertool, 2. '
Examples include 3°5.6-titrafluorophenol and tetrafluororesorcin.

Examples of the halogenated silicon compound having a hydrogen-silicon bond include )ISiCl, )12si[:12. H3S
iC1.

HCLSiCl, , HCzl(ssiclz,
H(t-C4Hs)SiC1□.

HCsHsSiC]2. H(CL)zsicl,
H(i-CJ7)zsicILC2LSiC], H
2(n-C2Hs)SiC1,H2(C6H4CH3)
Examples include SiC1, H3iC1 (C611s)2, and the like.

Metal halides include B, AI, Ga, I
n.

TI, Si, Ge, Sn, Pb, As,
Sb, Bi chloride, fluoride, bromide, iodide, especially BCl3, BBra, BI3
, AlCl3, AlBr3゜GaC15, GaB
r+, 1nc1s, TlCl3, 5iC1a
.

5nC14, 5bC1s, 5bPs, etc. are suitable.

Ingredient 1. Components 2 and 3, and the halogen-containing compound that can be brought into contact as necessary, are brought into contact by mixing and stirring in the presence or absence of an inert medium, and by mechanical co-pulverization. Ru. 40-150 contacts
It can be carried out under heating at ℃.

As the inert medium, saturated aliphatic hydrocarbons such as hexane, heptane and octane, saturated alicyclic hydrocarbons such as cyclopentane and cyclohexane, aromatic hydrocarbons such as benzene, toluene and xylene can be used.

A preferred method for preparing component A in the present invention is disclosed in Japanese Patent Application Laid-open No. 63
-264607, 58-198503, 62-
This method is disclosed in Japanese Patent No. 146904 and the like. More specifically, ■ (a) metallic magnesium, (b) halogenated hydrocarbon, (c) general formula X, , M(OR> , ,
A magnesium-containing solid obtained by contacting a compound (same as the alkoxy group-containing compound described above) with (
d) Contact with halogen-containing alcohol, then (e)
Method of contacting with an electron-donating compound and (h) a titanium compound (JP-A-63-264607), ■ (a) Magnesium dialkoxide and (b) hydrogen-
After contacting a halogenated silicon compound having a silicon bond, (c) contacting a halogenated titanium compound, and then (
d) A method of contacting with an electron-donating compound (further contacting with a halogenated titanium compound if necessary) (Unexamined Japanese Patent Publication No. 6
2-146904) ■ (a) Magnesium dialkoxide and (b) hydrogen-
A method of contacting a halogenated silicon compound having a silicon bond, (c) contacting an electron-donating compound, and then (d) contacting a titanium compound (JP-A-58-19850)
Publication No. 3).

Among these, method (2) is particularly desirable.

Component A is prepared as described above, and if necessary, component A may be washed with the above-mentioned inert medium and may be further dried.

In addition, component A further comprises, in the presence of an organoaluminum compound,
Olefin polymers formed in component A upon contact with olefins may also be included. The organoaluminum compound is selected from the organometallic compounds described below, which are one of the components of the present catalyst.

Examples of olefins include ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene, etc.
-Olefins may be used.

Contact with the olefin is preferably carried out in the presence of the inert medium described above. The contact is usually carried out at a temperature of 100°C or less, preferably -10 to +50°C. The amount of olefin polymer contained in component A is usually 0.1 to 100 g per gram of component A.

In the contact between component A and the olefin, an electron-donating compound may be present together with the organoaluminum compound. The electron-donating compound is selected from the compounds used in preparing component A, organosilicon compounds having a 5i-0-C bond or a 5i-N-C bond, and the like. Component A that has been in contact with the olefin can be washed with the above-mentioned inert medium, if necessary, or further dried.

Organometallic compoundsOrganometallic compounds (hereinafter referred to as component B) are found in the first part of the periodic table.
It is an organic compound of a group metal to a group II metal. As component B, organic compounds of lithium, magnesium, calcium, zinc and aluminum can be used. Among these, organoaluminum compounds are particularly suitable. As organoaluminum compounds that can be used, general formulas R,,AlX
3-. (However, R is an alkyl group or an aryl group,
represents a halogen atom, an alkoxy group, or a hydrogen atom, and n
is an arbitrary number in the range of 1≦n≦3. ), such as trialkyl aluminum, dialkyl aluminum monohalide, monoalkyl aluminum civalide, alkyl aluminum sesquihalide,
Particularly preferred are alkyl aluminum compounds having 1 to 18 carbon atoms, preferably 2 to 6 carbon atoms, such as dialkyl aluminum monoalkoxides and dialkyl aluminum monohydrides, or mixtures or complexes thereof. Specifically, trialkylaluminum such as trimethylaluminum, triethylaluminum, tripropylaluminum, triisobutylaluminum, trihexylaluminum, dimethylaluminum chloride, diethylaluminum chloride, diethylaluminum bromide, diethylaluminum iodide, diisobutylaluminum chloride, etc. dialkylaluminum monohalides, methylaluminum dichloride, ethylaluminum dichloride, methylaluminum dichloride, ethylaluminum dichloride, ethylaluminum diiodide, isobutylaluminum dichloride, monoalkylaluminum cybarides, alkylaluminum sesquihalides such as ethylaluminum sesquichloride, Dialkyl aluminum monoalkoxides such as dimethyl aluminum methoxide, diethylaluminum ethoxide, diethylaluminum phenoxide, dipropyl aluminum ethoxide, diisobutyl aluminum ethoxide, diisobutyl aluminum phenoxide, dimethyl aluminum hydride, diethyl aluminum hydride, dipropyl aluminum hydride, diisobutyl aluminum Examples include dialkyl aluminum hydride such as hydride. Among these, trialkylaluminum is preferred, particularly triethylaluminum and triisobutylaluminum. In addition, these trialkylaluminums may be combined with other organoaluminum compounds such as industrially easily available diethylaluminum chloride, ethylaluminum dichloride, ethylaluminum sesquichloride, diethylaluminum ethoxide, diethylaluminium hydride, or mixtures or complex compounds thereof. Can be used in combination with etc.

Furthermore, an organic aluminum compound in which two or more pieces of aluminum are bonded via an oxygen atom or a nitrogen atom can also be used. Such compounds include, for example (C2H5)
2A10A1(C2H5) 2 .

(C4H9)2A10A1(C4H11)2 , (
Examples include C2)1s)2AINAI(C2H5)22L.

Examples of organic compounds of metals other than aluminum include diethylmagnesium, ethylmagnesium chloride, diethylzinc, etc., as well as LiA1 (CJs)4. LiA1(CtH+s)4
Compounds such as

Dimethoxysilane compound A dimethoxysilane compound (hereinafter referred to as component C) is one component of the polymerization catalyst used in the present invention.

is represented by the above general formula. In the formula, R1-R
The hydrocarbon group of 6 includes an alkyl group, an alkenyl group,
Examples include a cycloalkyl group, a cycloalkenyl group, a cycloalkagenyl group, an aryl group, and an aralkyl group.

Alkyl groups include methyl, ethyl, propyl, i-
Propyl, butyl, i-butyl, S-butyl, t-butyl, amyl, i-amyl, t-amyl, hexyl, octyl, 2-ethylhexyl, decyl, etc., and alkenyl groups include vinyl, allyl, propenyl, etc. , 1-butenyl, 1-pentenyl, 1-hexenyl, 1-octenyl, 1-dekenyl, 1-methyl-1-pentynyl, 1-
Examples of cycloalkyl groups include cyclopentyl, cyclohexyl, methylcyclohexyl groups, etc.; examples of cycloalkenyl groups include cyclopentenyl, cyclohexenyl, methylcyclohexenyl groups, and cycloalkagenyl groups. Examples of aryl groups include phenyl, tolyl, xylyl groups, etc.; examples of aralkyl groups include benzyl, phenethyl, 3-phenylpropyl groups, etc. Can be mentioned.

A specific example of component C is described below using a chemical formula. In the formula, Me: methyl, Bt: ethyl, Pr: propyl,
Bu Nibutyl, Pt: Pentyl, Hex: Hexyl, O
ct: octyl, Dec indicates didecyl (the same applies to the components).

(Me)zsi(口Me)2 + (Bt)zsi
(OMe)z , (n PrLSi(OMe)
)2. (i-Pr)28i(OMe)2. (n
-Bu)*Si(OMe), (i-Bu)2s
i(OMe>2.(s-Bu)2si(OMe)z
.

(t-Bu)zsi(OMe)2. (n-Pt)2
si(OMe)*, (n-Hex)zsi(OM
e)2, (Me)(Bt)Si(OMe)z
, (Me)(nPr)Si(OMe)2 , (
Me)(n-Bu)Si(OMe)s, (Me
)(t-Bu)Si(OMe)z, (Me)(
n-Hex)Si(OMe)2, (Et)(iP
r) Si(OMe)2, (Bt)(n-Bu)S
i(OMe)2 , ([Et)(t-Bu)Si(
OMe)z, (Et)(n-Hex)Si(D
Me)2, (n-Pr)(i-Pr)Si(OM
e)z, (n-Pr)(t-Bu)Si(OM
e) 2.

(n-Pr)(n-Pt)Si(OMe)2, (
n-Bu)(t-Bu)Si(OMe)2゜(i-Bu
)(t-Bu)Si(OMe)z, (t-Bu
)(t-Pt)Si(OMe)2゜(t-Bu)(s-
Pt)Si(OMe)z, (t-Pt)zsi
(OMe)z.

[(n-Pr)(Me)CH] zsi(OMe)z
, (t-Pt)(s-Pt)Si(OMe)a,
[:(Me)accH2:]zS+(OMe)z
.

[:(Bt)(Me)CH-CL] 2si(OM
e) z, (t-Pt)[(Mr)sC-CH2
] Si(OMe)z, C(n-Pr)(Me)
zC')(t-Pt)Si(OMeL,C(Bt)
(MeLC-CH2:] (t-Pt)Si(OMe
)a , [:(n Pr)(Me)2C″] 2
Si(OMe)2.

[(Total L) (Me) 2 cm 1 j (2] zsi (OM
e>z, [(Me>3c・CaHil 2
Si(OMe)z, (t-Hex)[(Bt
)(Me)2c・CL'] Si(OMe)2
; (MeaSi)(Me)Si(OMe)2.

(MesSi)(Bt)Si(OMe)2, (M
esSi)(i-Pr)Si(OMe)s, (
MesSi)(t-Bu)Si(OMelL,
(Me+Si)(n-Bu)Si(OMe)2,
(Me3Si)(s-Bu)Si(OMe)2.

(Me3Si) (cyclopentyl)Si(OMe)z
, (Me+5i)(cyclopentagenyl)Si
(OMe), (Me3si)2Si(OMe>2
, (BtaSi)(Me)Si(mouthMe)2
, (Bt+Si)(Bt)Si(OMe)a
, (Bt3Si)(i-Pr)Si(OMe)+
.

(BtaSi)(t-Bu)Si(OMe)2. (
Bt+Si)(n-Bu)Si(OMe)2. (E
tsSi)(s-Bu)Si(OMe)2. (tE
t+5i)(cyclopentyl)Si(OMe)z,
(Bt3Si)(cyclopentagenyl)Si(OM
e) , (MesSi)2Si([]Me)2;(
Me3SiO)(Me)Si(OMe)z,
(Me+SiO)(Bt)Si(DMe)z, (
Me3SiO)(i-Pr)Si(OMe)2. (
Me, SiO)(t-Bu)Si(OMe)z,
(Bt+SiO)(Me)Si(OMe>z.

(BtsSiO)(Bt)Si(OMe)z, (
BtaSiO)(i-Pr)Si(OMe)2. (
Bt+SiO)(t-Bu)Si(OMe)2; (
BtO)(i-Pr)Si(OMe)z, (i-
PrO)(Me)Si(OMe)2. (i-PrO
)(n-Pr)Si(OMe>2.(n-Pro)
(t-Pt)Si(OMe)a.

(i-Pro)(n-Hex)Si(OMe)z,
(n-Bun)(Me)Si(OMe)2. (t
-Bun)(Me)Si(OMe)z, (s-B
uO)(Bt)Si(OMe)2. (i-Bun)
(i-Pr)Si(OMe)a, (t-Bun)
(tBu)Si(OMe)2. (n-Bun) (s
-Bu)Si(OMe)2゜(t-Bun)(n-Pt
)Si(OMe)+ , (n-PtO)(i-P
r) Si(OMe)2, (t-PtO)(t-B
u) Si(OMe)z, (t-PtO)(t
-Pt)Si(OMe>*, (t-PtO)(
Me)Si(OMe)z.

(n-PtO)(Bt)Si(OMe)z, (
n-Hex)(Me)Si(OMe)z.

(n-Hex)(Bt)Si(OMe)2, (n
-HexO)(i-Pr)Si(OMe)2, (
n-HexO)(t-Bu)Si(OMe)z,
(n-HexO) (n-Hex)Si(DMe)a
, (n-HexO)(n-Oct)Si(OMe
)2゜(n-OctO)(Me)Si(OMe)2.
(n-OctO) (n1 member) Si(DMe) 2 ,
(i-Pro) (cyclohexyl) Si(OM
e)z.

(i-PrO) (cyclopentyl)Si(OMe)2
．． (i-Pro)(cyclopentagenyl)Si
(OMe), (n-Bun) (cyclohexyl)
Si(OMe)2. (n-Bun)(cyclopentyl)Si(OMe)-, (n-Bun)(cyclopentagenyl)Si(OMe), (i-BuO)(
cyclohexyl)Si(OMe)z, (i-Bu
n) (cyclopentyl)Si(OMe)z(i-Bun
) (Cyclopentadienyl)Si(OMe)(t-B
un) (cyclohexyl)Si (OMe) 2 L
(t-Bun)(cyclopentyl)Sl(OMe)
2, (t-Bun) (cyclopentagenyl)Si(OMe), (t-PtO) (cyclohexyl)Si(OMe)z, (t-PtO)(cyclopentyl)Si([]Me)2. (t-PtO
) (Cyclopentadienyl)Si(OMe).

Alkoxysilane compound Zirkoxysilane compound (hereinafter referred to as component) is one component of the polymerization catalyst used in the present invention.

is represented by the above general formula. In the formula, R7-R
Examples of the 12 hydrocarbon groups include an alkyl group, an alkenyl group, a cycloalkyl group, a cycloalkenyl group, a cycloalkagenyl group, an aryl group, and an aralkyl group.

Alkyl groups include methyl (excluding R7), ethyl, propyl, 1-probinobebutinobe i-
Butyl, S-butyl, t-butyl, amyl, i-amyl, t-amyl, hexyl, octyl, 2-ethylhexyl, decyl, etc., and alkenyl groups include vinyl, allyl, propenyl, l-butenyl, l- pentenyl, 1
-hexenyl, 1-octenyl, 1-r'r2Rt, 1
-Methyl-1-pentynyl, 1-methyl-1-heptenyl, etc.; as the cycloalkyl group, cyclopentyl,
Cyclohexyl, methylcyclohexyl groups, etc., cycloalkenyl groups include cyclopentenyl, cyclohexenyl, methylcyclohexenyl groups, etc., and cycloalkagenyl groups include cyclopentajenyl, methylcyclopentajenyl, indenyl. Examples of the aryl group include phenyl, tolyl, and xylyl groups, and examples of the aralkyl group include benzyl, phenethyl, and 3-phenylpropyl groups. The hydrocarbon groups R9 and RIO are preferably alkyl groups, particularly methyl and ethyl groups.

Specific examples of the ingredients are listed below.

(BtO)2si(OMe)z, (n-Pr
o) zsi (mouth Me) 2 (i-PrO) zsi (OM
e) a, (t-BuO)2si(OMe)s.

(s-BuO)2si(OMe)z, (n-Bu
O)2si(OMe)z.

(i-BuO)Si(OMe)2. (t-PtO)
2si(DMe)z, (nPtO)2si(OM
e) 2, (n-HexO)2si(OMe)*
, (n-mouth ctO)zsi(OMe)2.
(n-DecO)2si(OMe)z, (n-
PrO)2Sx(OBt)2. (l-Pro)2s
i(0[!t)2. (t-fluo)*5i(OB
t)s, (s-BuO)zsi(OBt)2
, (n-BuO)*Si(mouth at)2. (
i-BuO)2si(OEt)z, (t-PtO
)2si(OBt)s(n-PtO)zsi(OBt)
2. (n-HexO)sSi(OBt)2. (
nOctO)zsi(OBt)2. (n-DecO
)zsi(OEt)+; (E!to)(i-P
ro)Si(OMe)z, (BtO)(n-
BuO)Si(OMe)2゜(BtO)(s-BuO)
Si(OMe)2. (BtO)(n-PtO)Si
(OMe)z, (i-Pro)(n-BuO
)Si(OMe)2, (n-Pr)(t-B
uO)Si(OMe)z, (t-BuO)(n
−[]uO)Si(OMe)2゜(s-BuO) (i
-BuO) 2si (OMe> 2, (t-
PLO) (n-PrO) Si (0M8>2,
(n-PtO)(i-PrO)Si(OMe)z,
(n-BuO)(t-PtO)Si(OMe)2.
(s-BuO) (s-PtO) Si (OMe) 2゜ (i-BuO) (n-PtO) Si (OMe)
2, (t-PtO) (n-PtO) Si(OM
e)2. (t-PtO) (n-HexO)Si(O
Me)s, (Men)(i-PrO)Si(O
Bt)z, (Men)(n-BuO)Si(O
Bt)z, (i-PrO)(n-BuO)Si
(OBt)2. (n-Pro)(t-BuO)Si
(OBt)2, (t-BuO)(n-BuO)
Si(0tL, (s-BuO)(iBuO)Si
(OBt)2, (t-PtO)(n-Pro)S
t(OBt)z.

(n-PtO)(i-PrO)Si(OBt)z,
(n-BuO)(t-PtO)Si(OBt)a
, (s-BuO)(s-PtO)Si([1Bt
L, (i-BuO)(n-PtO)Si(OB
t)2, (t-PtO)(n-PtO)Si(O
Bt)z.

(t-PtO)(n-HexO)Si(OEt)z
: (BtO)Si(Me)3.

(i-Pro)Si([]Me)+, (n-BuO)S
i(OMe)3. (s-BuO)Si([1Me)
a, (i-BuO)Si(DMe)3. (t
-BuO)Si(CIMe)3, (t-PtO
)St(OMe>s, (nPt0)Sl
(mouth Me),.

(n-HexO)(OMe)s, (n-Oc
tO)Si(OMe)+, (n-DecO)
Si(OMe)3, (Men)Si(OBt)
3, (i-PrO)Si(Bt)3, (n
-BuO)Si(OBt), l, (s-BuO
)Si(Bt)3.

(i-BuO)Si (mouthBt)3, (t-B
uO)Si(OBt)+, (t-PtO)S
i(OBt)s, (n-PtO)Si(OBt
)+ , (+1-HexO)Si(DBt)s
, (n-DctO)Si(DEt)s,
(n-DecO)(DBt)3; MesSi
O3+ (OMe>3, Et3S+mouth S+ (
OMe)3.

Me3SIO3l(OEt)3. Bt3StO3t(O
Et)3, (Me3S+0)2Si(OMe>
z, (Bts 5iO)+Si(OMe)
2, (EtsSi口)3Si(OBt)z
, (Bt+Si[]LSi(OBt)2:
Si (mouth Bt),.

The polymerization catalyst used in the present invention consists of component A, component B, component C, and component B.
is 1 to 2.000 gmol, preferably 20 to 500 gmol per gram atom of titanium in component A, component C.
and component ratio is 0 per mole of component B in their total amount.
, 001 to 10 mol, preferably 0.01 to 1.0 mol. In addition, component C is 10 to 90 mol% of the total amount of component C, preferably 2
0 to 80 mol%, 90 to 10 mol%, preferably 80 to 20 mol%.

Polymerization of α-olefin In the present invention, α-olefin is polymerized in the presence of the above polymerization catalyst to produce polyα-olefin.

α-olefins include α-olefins having 3 to 10 carbon atoms, such as propylene, 1-butene, 4-methyl-
Examples include 1-pentene, 1-hexene, and 1-octene.

In addition to the homopolymerization of α-olefins, the present invention
-Olefin mutual and/or ethylene etc. having 2 to 1 carbon atoms
Random copolymerization or block copolymerization with 0 other monoolefins or diolefins having 3 to 10 carbon atoms is also possible.

The polymerization reaction may be performed in either a gas phase or a liquid phase. When polymerizing in a liquid phase, inert carbonization of normal butane, isobutane, normal pentane, isopentane, hexane, heptane, octane, cyclohexane, benzene, toluene, xylene, etc. It can be carried out in hydrogen and in liquid aqueous solution. The polymerization temperature is usually in the range of -80°C to +150°C, preferably 40 to 120°C. The polymerization pressure may be, for example, 1 to 60 atmospheres. The molecular weight of the resulting polymer can also be controlled by the presence of hydrogen or other known molecular weight regulators. Further, the amount of other olefin to be copolymerized with the α-olefin in the copolymerization is usually selected within the range of 30% by weight, particularly from 0.3 to 15% by weight based on the α-olefin. The polymerization reaction in the present invention is carried out in a continuous or batchwise reaction, and the conditions may be those commonly used. Further, the copolymerization reaction may be carried out in one stage, or may be carried out in two or more stages.

EFFECTS OF THE INVENTION By the method of the invention, poly-α-olefins having a broader molecular weight distribution can be produced while maintaining catalytic polymerization activity than when component C or each component is used alone.

EXAMPLES The present invention will be specifically explained by examples and application examples. Note that percentages (%) in the examples are based on weight unless otherwise specified.

The molecular weight distribution of the polymer is Isao (weight average molecular weight) / Ayu (
The number average molecular weight is a value measured by GPC.

Example 1 Preparation of component A Chip-shaped metallic magnesium (purity 99.5%,
Average particle size L 6 mm) 8.3 g and n-hexane 2
After stirring at 68°C for 1 hour, magnesium metal was taken out and dried under reduced pressure at 65°C to obtain preactivated magnesium metal.

Next, n-butyl ether 1
40 ml and 0.5 i of a solution of n-butylmagnesium chloride in n-butyl ether (1,75 mol/Il)
ll! The added suspension was kept at 55° C., and a solution of 38.5 mm of n-butyl chloride dissolved in 50 ml of n-butyl ether was added dropwise over 50 minutes. 4 at 70°C under stirring
After carrying out the reaction for an hour, the reaction solution was maintained at 25°C.

Next, HC (DCJs) 355.7 was added dropwise to this reaction solution over a period of 1 hour. After the dropwise addition was completed, the reaction was carried out at 60°C for 15 minutes, and the reaction product solid was diluted with 300% of n-hexane.
Washed twice, dried under reduced pressure at room temperature for 1 hour, and removed magnesium 1
31.6 g of magnesium-containing solid containing 9.0% and 28.9% chlorine were recovered.

300r equipped with reflux condenser, stirrer and dropping funnel
nf! 6.3 g of a magnesium-containing solid and 50 mm of n-hebutane were placed in a reaction vessel under a nitrogen gas atmosphere to form a suspension, and while stirring at room temperature, 20 mf (0.02 mmol) of 2.2.2-)lichlorethanol was added. ) and n-hebutane 1 liter
A mixed solution of rd was added dropwise from the dropping funnel over 30 minutes, and the mixture was further stirred at 80°C for 1 hour. The obtained solid was separated by filtration, washed four times with each 1'00 mf2 of n-hexane at room temperature, and further washed twice with each 100 mf2 of toluene to obtain a solid component.

40 ml of toluene was added to the above solid component, and further titanium tetrachloride was added so that the titanium tetrachloride/toluene volume ratio was 372, and the temperature was raised to 90°C. Under stirring, 2 ml of di-n-butyl phthalate! , and 5 rnl of toluene were added dropwise over 5 minutes, followed by stirring at 120° C. for 2 hours. The obtained solid substance was filtered at 90°C, and 100% each of toluene was added.
- twice at 90°C. Furthermore, titanium tetrachloride was newly added so that the titanium tetrachloride/toluene volume ratio was 3/2, and the mixture was stirred at 120° C. for 2 hours. The solid material obtained was filtered off at 110 °C and 100 mf each of n-
After washing with hexane seven times, 5.5 g of component A was obtained.

Component A 11 obtained above was placed in a stainless steel autoclave No. 1, 51 equipped with a propylene polymerization stirrer under a nitrogen gas atmosphere.
．． 3 mgS71 - A solution containing 0.1 mol of triethylaluminum (hereinafter referred to as TEAL) in 11 heptane 4- and 0.02 mol t- in n-heptane 11
Solution containing butoxymethyldimethoxysilane 1.4rn
f! 1.2 ml of a solution containing 0.01 mol of tetraethoxysilane in 1β of n-hebutane was mixed and held for 5 minutes. Next, after pressurizing 600 mf of hydrogen gas and liquid propylene 1β as a molecular weight control agent,
The reaction system was heated to 70°C, and propylene was polymerized for 1 hour. After completion of polymerization, purge unreacted propylene,
A white polypropylene powder was obtained.

The polymerization activity of the catalyst was 21.1 kg/g/component.

Moreover, Plw/1ion of the obtained polypropylene was 7.5.

Examples 2 to 5 Propylene polymerization was carried out in the same manner as in Example 1, except that component C and components shown in Table 1 were used in the proportions shown in Table 1, and the results are shown in Table 1. Ta.

Comparative Examples 1 to 7 Propylene was polymerized in the same manner as in Example 1 except that Component C and Component were not used. The results are shown in Table 1.

Example 7 Preparation of component A 170 g of commercially available magnesium jetoxide was added to a 12 m diameter
A stainless steel (SUS316) mill pot with an internal volume of 1.21 m containing 400 balls made of stainless steel (SO3316) was placed in a nitrogen gas atmosphere, and after the mill pot was attached to a shaker, the amplitude was 10 mm and the number of rotations. 142
The contact was carried out by shaking with Orpm for 2 hours, and the pulverized material (I>
I got it.

200r equipped with reflux condenser, dropping funnel and stirrer
The glass reactor in step d. is sufficiently purged with nitrogen gas. In this reactor, 8.3 g of pulverized material (I) and 42 g of n-hebutane were added.
mj! After that, a mixed solution of 14.9 g of trichlorosilane and 30 g of n-hebutane was added dropwise from the dropping funnel over 30 minutes while stirring at room temperature, and the mixture was further stirred at 65° C. for 4 hours. The obtained solid was separated by filtration at 65°C, and washed with 100 mJ of n-heptane at room temperature twice each and 100 mJ of toluene at room temperature three times each for 10 minutes while stirring and pressing, and then a toluene slurry of the reaction solid (I) was prepared. I got it.

Add 51mf of TiCl to a toluene slurry consisting of reaction solid (I>8.5g and 26rn1 of toluene,
The internal temperature was raised to 80 DEG C. over a period of minutes, and after the temperature was raised, a mixed solution consisting of 1.7 g of di-n-butyl phthalate and 8 g of toluene was added dropwise over 15 minutes using a dropping funnel.

Thereafter, the temperature was further raised to 115°C, and the mixture was stirred at the same temperature for 2 hours. After removing the supernatant by decantation,
Washing was carried out twice using 100% toluene and stirring at a temperature of 90° C. for 10 minutes. Next, add 2 l of new toluene
1TIC1251- was added and stirred at 115°C for 2 hours.

The obtained solid substance was filtered at 115°C and washed eight times with 100 bottles of n-hebutane at room temperature each time to obtain a hebutane slurry of component A.

Polymerization of propylene Propylene was produced in the same manner as in Example 1, except that component A1 obtained above, component C1 shown in Table 2, and triisobutylaluminum were used instead of TEAL, and the polymerization temperature was 80°C. The results are shown in Table 2.

Example 8 Polymerization of propylene was carried out in the same manner as in Example 7, except that the compounds shown in Table 2 were used as component C and the components.
The results are shown in Table 2.

Comparative Example 8.9 Polymerization of propylene was carried out in the same manner as in Example 7 except that Component C or Component C was not used. The results are shown in Table 2.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing the process of preparing a polymerization catalyst used at the main station.

Claims (1)

[Claims] (A) Solid catalyst component containing magnesium, titanium, halogen, and an electron-donating compound as essential components, (B) Organometallic compound, and (C) General formula ▲ Numerical formula, chemical formula, table, etc. ▼ [However, R^1 is a hydrocarbon group having 1 to 10 carbon atoms, OR
^3, SiR^4_3 or OSiR^5_3, R^
2 is a hydrocarbon group having 1 to 10 carbon atoms or SiR^6
_3, and R^3, R^4, R^5 and R^6 each represent a hydrocarbon group having 1 to 10 carbon atoms. ] Dimethoxysilane compound and (D) general formula ▲ Numerical formula, chemical formula, table, etc. ▼ [However, R^7 is a hydrocarbon group with 2 to 10 carbon atoms or SiR^1^1_3, R^8 is carbon Several 1 to 10 hydrocarbon groups or SiR^1^2_3, R^9 and R^
1^0 represents the same or different hydrocarbon group having 1 to 10 carbon atoms, and R^1^1 and R^1^2 represent hydrocarbon groups having 1 to 10 carbon atoms. ] A method for producing a polyα-olefin, which comprises polymerizing an α-olefin in the presence of a polymerization catalyst comprising an alkoxysilane compound.