JP2795496B2 - Higher α-olefin copolymer and method for producing the same - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a novel higher α-olefin-based copolymer and a method for producing the same, and more specifically, to dynamic fatigue resistance (bending fatigue resistance), weather resistance, and resistance to dynamic fatigue. Ozone, heat aging,
The present invention relates to a higher α-olefin-based copolymer which has excellent properties such as low-temperature properties and can be used for various rubber products and resin modifiers, and a method for producing the same.

TECHNICAL BACKGROUND OF THE INVENTION Ethylene-propylene-diene copolymers have good heat resistance and ozone resistance, so
It is widely used as industrial rubber products, electrical insulating materials, civil engineering building materials, rubber products such as rubberized cloth, and plastic blending materials for polypropylene, polystyrene and the like.
However, this ethylene-propylene-diene copolymer is inferior in dynamic fatigue resistance, and thus is unsuitable for a specific application, for example, a vibration-proof rubber, a rubber roll, a belt, a tire, and a cover material for a vibrating part. .

Natural rubber is excellent in dynamic fatigue resistance, but is inferior in heat resistance and ozone resistance, and has a problem in practical use.

On the other hand, JP-A-63-150307 discloses a random copolymer composed of hexene-1 and 4-methylpentene-1. Such a random copolymer is used as a vibration-proof rubber. Had to be vulcanized with a peroxide. Therefore, when the above-mentioned vulcanization is carried out, vulcanization and molecular cleavage occur in parallel, so that there is a problem that the physical properties inherent in this copolymer cannot be sufficiently exhibited.

The present inventors have been studying to obtain a polymer having excellent properties such as weather resistance, ozone resistance and heat aging resistance, and also excellent in dynamic properties such as bending resistance, and have studied a specific catalyst for olefin polymerization. When a specific higher linear α-olefin, 4-methylpentene-1 and a specific non-conjugated diene were copolymerized in the presence, a higher α-olefin copolymer excellent in the above properties was obtained. And found that the present invention was completed.

Object of the invention The present invention has excellent weather resistance, ozone resistance, heat aging resistance and low-temperature properties, and has an object to provide a higher α-olefin copolymer excellent in dynamic fatigue resistance and a method for producing the same. I have.

SUMMARY OF THE INVENTION The higher α-olefin copolymer according to the present invention comprises a linear higher α-olefin having 6 to 20 carbon atoms, 4-methylpentene-1, and a non-alkylene represented by the following general formula [I]. A copolymer comprising a conjugated diene and (a) a linear higher α
The molar ratio of olefin to 4-methylpentene-1 (linear higher α-olefin / 4-methylpentene-1) is 50
(B) the iodine value is in the range of 2 to 40, and (c) the intrinsic viscosity [η] measured in a decalin solvent at 135 ° C. is 1.0 to 10.0 dl /. g, and (d) the degree of crystallinity measured by X-ray diffraction is 5% or less.

(In the formula, n is an integer of 1 to 5, R ¹ is an alkyl group having 1 to 4 carbon atoms, R ² and R ³ are a hydrogen atom or 1 to 8 carbon atoms.
Represents an alkyl group. However, R ₂ and R ³ are not both hydrogen atoms. Further, the method for producing a higher α-olefin copolymer according to the present invention comprises: [A] a solid titanium catalyst component containing magnesium, titanium, halogen and an electron donor as essential components, and [B] an organoaluminum compound catalyst. A linear higher α-olefin having 6 to 20 carbon atoms, 4-methylpentene-1, and the following general formula: Copolymerizing the non-conjugated diene represented by [I], and (a) the molar ratio of linear higher α-olefin to 4-methylpentene-1 (linear higher α-olefin / 4-methylpentene). -1) is in the range of 50/50 to 95/5, and (b)
Iodine value is in the range of 2 to 40; (c) intrinsic viscosity [η] measured in decalin solvent at 135 ° C. is in the range of 1.0 to 10.0 dl / g; (d) X-ray diffraction method It is characterized in that a higher α-olefin-based copolymer having a measured crystallinity within a range of 5% or less is obtained.

(In the formula, n is an integer of 1 to 5, R ¹ is an alkyl group having 1 to 4 carbon atoms, R ² and R ³ are a hydrogen atom or 1 to 8 carbon atoms.
Represents an alkyl group. However, R ₂ and R ³ are not both hydrogen atoms. Hereinafter, the higher α-olefin-based copolymer according to the present invention and the method for producing the same will be described in detail.

The higher α-olefin copolymer according to the present invention is a straight-chain higher α-olefin, and 4-methylpentene-1,
And non-conjugated dienes.

The linear higher α-olefin used in the present invention is an α-olefin having 6 to 20 carbon atoms, and specifically, hexene-1, heptene-1, octene-1, nonene-
1, decene-1, undecene-1, dodecene-1, tridecene-1, tetradecene-1, pentadecene-1, hexidecene-1, heptadecene-1, nonadecene-1, eicosene-1 and the like.

In the present invention, the above-mentioned linear higher α-olefin may be used alone, or may be used as a mixture of two or more.

Of the above linear higher α-olefins, hexene-
1, octene-1, decene-1, and dodecene-1 are preferably used.

The non-conjugated diene used in the present invention is a non-conjugated diene represented by the following general formula [I].

(In the formula, n is an integer of 1 to 5, R ¹ is an alkyl group having 1 to 4 carbon atoms, R ² and R ³ are a hydrogen atom or 1 to 8 carbon atoms.
Represents an alkyl group. However, R ₂ and R ³ are not both hydrogen atoms. As the non-conjugated diene as described above, specifically, 4
-Methyl-1,4-hexadiene, 5-methyl-1,4-hexadiene, 4-ethyl-1,4-hexadiene, 5-ethyl-1,4-hexadiene, 5-methyl-1,4-heptadiene, 6 -Methyl-1,4-heptadiene, 5-ethyl-1,4
-Heptadiene, 6-ethyl-1,4-heptadiene, 5
-Methyl-1,5-heptadiene, 6-methyl-1,5-heptadiene, 5-ethyl-1,5-heptadiene, 6-ethyl-1,5-heptadiene, 6-methyl-1,4-octadiene, 7 -Methyl-1,4-octadiene, 6-ethyl-1,4
-Octadiene, 7-ethyl-1,4-octadiene, 6
-Methyl-1,5-octadiene, 7-methyl-1,5-octadiene, 6-ethyl-1,5-octadiene, 7-ethyl-1,5-octadiene, 6-methyl-1,6-octadiene, 7 -Methyl-1,6-octadiene, 6-ethyl-1,6
-Octadiene, 7-ethyl-1,6-octadiene, 7
-Methyl-1,4-nonadiene, 8-methyl-1,4-nonadiene, 7-ethyl-1,4-nonadiene, 8-ethyl-1,4
-Nonadiene, 7-methyl-1,5-nonadiene, 8-methyl-1,5-nonadiene, 7-ethyl-1,5-nonadiene, 8-ethyl-1,5-nonadiene, 7-methyl-1,6 −
Nonadiene, 8-methyl-1,6-nonadiene, 7-ethyl-1,6-nonadiene, 8-ethyl-1,6-nonadiene,
7-methyl-1,7-nonadiene, 8-methyl-1,7-nonadiene, 7-ethyl-1,7-nonadiene, 8-ethyl-
1,7-nonadiene, 8-methyl-1,4-decadiene, 9-
Methyl-1,4-decadiene, 8-ethyl-1,4-decadiene, 9-ethyl-1,4-decadiene, 8-methyl-1,5-
Decadiene, 9-methyl-1,5-decadiene, 8-ethyl-1,5-decadiene, 9-ethyl-1,5-decadiene,
8-methyl-1,6-decadiene, 9-methyl-1,6-decadiene, 8-ethyl-1,6-decadiene, 9-ethyl-
1,6-decadiene, 8-methyl-1,7-decadiene, 9-
Methyl-1,7-decadiene, 8-ethyl-1,7-decadiene, 9-ethyl-1,7-decadiene, 8-methyl-1,8-
Decadiene, 9-methyl-1,8-decadiene, 8-ethyl-1,8-decadiene, 9-ethyl-1,8-decadiene and the like can be mentioned.

In the present invention, the above non-conjugated dienes may be used alone or as a mixture of two or more.

Further, in addition to the non-conjugated diene as described above, other copolymerizable monomers such as ethylene, propylene, and butene-1 may be used as long as the object of the present invention is not impaired.

The molar ratio of the linear higher α-olefin and 4-methylpentene-1 constituting the higher α-olefin copolymer of the present invention (linear higher α-olefin / 4-methylpentene-1) is as follows: It is in the range of 50/50 to 95/5, preferably 55/45 to 90/10.

The composition of the higher α-olefin copolymer can be measured by ¹³ C-NMR method.

The higher α-olefin copolymer of the present invention has an iodine value of 2 to 40, preferably 5 to 30. These characteristic values are reference values when the higher α-olefin copolymer of the present invention is vulcanized using sulfur or peroxide.

The intrinsic viscosity [η] of the higher α-olefin-based copolymer of the present invention measured in a decalin solvent at 135 ° C. is 1.0 to 10.0 dl /.
g, preferably in the range of 1.5 to 7 dl / g. This characteristic value is a measure of the molecular weight of the higher α-olefin copolymer of the present invention, and is combined with other characteristic values to provide weather resistance, ozone resistance, heat aging resistance, low temperature characteristics, dynamic resistance. This is useful for obtaining a copolymer having excellent properties such as fatigue.

The degree of crystallinity of the higher α-olefin-based copolymer according to the present invention as measured by X-ray diffraction is 5% or less, preferably 3% or less. The crystallinity is determined by performing X-ray diffraction measurement on a pressed sheet 20 hours after molding.

The higher α-olefin copolymer according to the present invention as described above can be produced by the following method.

The higher α-olefin copolymer according to the present invention is obtained by copolymerizing a linear higher α-olefin, 4-methylpentene-1, and a non-conjugated diene in the presence of an olefin polymerization catalyst. Is obtained by

The olefin polymerization catalyst used in the present invention is formed from a solid titanium catalyst component [A], an organoaluminum compound catalyst component [B], and an electron donor catalyst component [C].

FIG. 1 shows an example of a flowchart of a method for preparing a catalyst component for olefin polymerization used in producing the higher α-olefin copolymer according to the present invention.

The solid titanium catalyst component [A] used in the present invention is a highly active catalyst component containing magnesium, titanium, halogen and an electron donor as essential components.

Such a solid titanium catalyst component [A] is prepared by contacting a magnesium compound, a titanium compound and an electron donor as described below.

In the present invention, the titanium compound used for preparing the solid titanium catalyst component (A) includes, for example, Ti (OR) _g X
_4-g (R is a hydrocarbon group, X is a halogen atom, 0 ≦ g ≦
The tetravalent titanium compound represented by 4) can be exemplified. More specifically, titanium tetrahalides such as TiCl ₄ , TiBr ₄ , and TiI ₄ ; Ti (OCH ₃ ) Cl ₃ , Ti (OC ₂ H ₅ ) Cl ₃ , Ti (On-C ₄ H ₉ ) Cl ₃ , Ti (OC ₂ H ₅ ) Br ₃ , Ti (OisoC ₄ H ₉ ) Br _3, etc .; trihalogenated alkoxytitanium; Ti (OCH ₃ ) ₂ Cl ₂ , Ti (OC ₂ H ₅ ) ₂ Cl ₂ , Ti ( _{On-C 4 H 9) 2} Cl 2, Ti (OC 2 H 5) 2 dihalogenated dialkoxy titanium, such as _{Br 2; Ti (OCH 3)} 3 Cl, Ti (OC 2 H 5) 3 Cl, Ti (On Monohalogenated trialkoxy titanium such as -C ₄ H ₉ ) ₃ Cl, Ti (OC ₂ H ₅ ) ₃ Br; Ti (OCH ₃ ) ₄ , Ti (OC ₂ H ₅ ) ₄ , Ti (On-C ₄ H) ₉₎ such as ₄ Ti (tetraalkoxy titanium such as _{Oiso-C 4 H 9) 4} Ti (O-2 _{-ethylhexyl) 4} can be mentioned.

Among these, a halogen-containing titanium compound, particularly a titanium tetrahalide, is preferable, and titanium tetrachloride is more preferably used. These titanium compounds may be used alone or in combination of two or more. Further, these titanium compounds may be diluted with a hydrocarbon compound or a halogenated hydrocarbon compound.

In the present invention, examples of the magnesium compound used for preparing the solid titanium catalyst component [A] include a magnesium compound having a reducing property and a magnesium compound having no reducing property.

Here, examples of the magnesium compound having a reducing property include a magnesium compound having a magnesium-carbon bond or a magnesium-hydrogen bond. Specific examples of the magnesium compound having such a reducing property include dimethylmagnesium, diethylmagnesium, dipropylmagnesium, dibutylmagnesium, diamylmagnesium, dihexylmagnesium, didecylmagnesium, ethylmagnesiumchloride, propylmagnesiumchloride, and butylmagnesium. Examples thereof include magnesium chloride, hexyl magnesium chloride, amyl magnesium chloride, butyl ethoxy magnesium, ethyl butyl magnesium, octyl butyl magnesium, and butyl magnesium halide. These magnesium compounds can be used alone or may form a complex compound with an organic aluminum compound described later. These magnesium compounds may be liquid or solid.

Specific examples of the non-reducing magnesium compound include magnesium halides such as magnesium chloride, magnesium bromide, magnesium iodide, and magnesium fluoride; methoxy magnesium chloride, ethoxy magnesium chloride, isopropoxy magnesium chloride, butoxy chloride. Alkoxy magnesium halides such as magnesium and octoxy magnesium chloride; alkoxy magnesium halides such as phenoxy magnesium chloride and methylphenoxy magnesium chloride; alkoxy such as ethoxy magnesium, isopropoxy magnesium, butoxy magnesium, n-octoxy magnesium and 2-ethylhexoxy magnesium Magnesium; allyoxymagne such as phenoxymagnesium and dimethylphenoxymagnesium Um; magnesium laurate, such as carboxylic acid salts of magnesium such as magnesium stearate and the like.

These non-reducing magnesium compounds may be compounds derived from the above-mentioned reducing magnesium compounds or compounds derived during the preparation of the catalyst component. A magnesium compound having no reducing property,
In order to derive from a reducing magnesium compound,
For example, a reducing magnesium compound may be contacted with a compound such as a polysiloxane compound, a halogen-containing silane compound, a halogen-containing aluminum compound, an ester, or an alcohol.

In the present invention, in addition to the magnesium compound having a reducing property and the magnesium compound having no reducing property, a magnesium compound is a complex compound of the magnesium compound and another metal, a complex compound or another metal compound. It may be a mixture. Further, a mixture of two or more of the above compounds may be used.

In the present invention, among these, a magnesium compound having no reducing property is preferable, and a halogen-containing magnesium compound is particularly preferable. Among these, magnesium chloride, alkoxymagnesium chloride, and allyloxymagnesium chloride are preferably used.

In the present invention, examples of the electron donor used for the preparation of the solid titanium catalyst component [A] include organic carboxylic acid esters, preferably polyvalent carboxylic acid esters, and specifically have a skeleton represented by the following formula. Compounds.

In the above formula, R ¹ represents a substituted or unsubstituted hydrocarbon group, R ² , R ⁵ , and R ⁶ represent a hydrogen atom, a substituted or unsubstituted hydrocarbon group, and R ³ and R ⁴ represent a hydrogen atom Represents a substituted or unsubstituted hydrocarbon group. Preferably, at least one of R ³ and R ⁴ is a substituted or unsubstituted hydrocarbon group. R ³ and R ⁴ may be connected to each other to form a cyclic structure. Examples of the substituted hydrocarbon group include N,
O, there are mentioned hydrocarbon group substituted containing a hetero atom such as S, for example, -C-O-C -, - COOR, -COOH, -OH, -SO 3 H, -C-N-C -, - Examples include a substituted hydrocarbon group having a structure such as NH ₂ .

Among them, a diester in which at least one of R ¹ and R ² is derived from a dicarboxylic acid having an alkyl group having 2 or more carbon atoms is preferable.

Specific examples of polyvalent carboxylic acid esters include diethyl succinate, dibutyl succinate, diethyl methyl succinate, diisobutyl α-methylglutarate, dibutyl methyl malonate, diethyl malonate, diethyl ethyl malonate, diethyl isopropyl malonate, butyl Diethyl malonate, diethyl phenylmalonate, diethyl diethylmalonate, diethyl allylmalonate, diethyldiisobutylmalonate, diethyldinormalbutylmalonate, dimethylmaleate, monooctylmaleate, diisooctylmaleate, diisobutylmaleate, butylmaleic acid Diisobutyl, diethyl butyl maleate, β
-Aliphatic polycarboxylates such as diisopropyl methylglutarate, diallyl ethyl succinate, di-2-ethylhexyl fumarate, diethyl itaconate, diisobutyl itaconate, diisooctyl citraconic acid, dimethyl citraconic acid, 1,2-cyclohexanecarboxylic acid Aliphatic polycarboxylates such as diethyl, diisobutyl 1,2-cyclohexanecarboxylate, diethyl tetrahydrophthalate, diethyl nadicate, monoethyl phthalate, dimethyl phthalate, methyl ethyl phthalate, monoisobutyl phthalate, diethyl phthalate , Ethyl isobutyl phthalate, mono-n-butyl phthalate,
Ethyl n-butyl phthalate, di-n-propyl phthalate, diisopropyl phthalate, di-n-butyl phthalate,
Diisobutyl phthalate, di-n-heptyl phthalate, di-2-ethylhexyl phthalate, didecyl phthalate, benzyl phthalate, diphenyl phthalate, diethyl naphthalene carboxylate, dibutyl naphthalene dicarboxylate, triethyl trimellitate, trimellitic acid Examples include aromatic polycarboxylic acid esters such as dibutyl, and esters derived from heterocyclic polycarboxylic acids such as 3,4-furancarboxylic acid.

Other examples of the polycarboxylic acid ester include diethyl adipate, diisobutyl adipate, diisopropyl sebacate, di-n-butyl sebacate, and n-sebacate.
Octyl, di-2-ethylhexyl sebacate and the like,
Esters derived from long chain dicarboxylic acids can be mentioned.

Among these polycarboxylic acid esters, compounds having a skeleton represented by the aforementioned general formula are preferred, and more preferably phthalic acid, maleic acid, substituted malonic acid, and the like, and alcohols having 2 or more carbon atoms. Esters are preferred, and diesters obtained by reacting phthalic acid with alcohols having 2 or more carbon atoms are particularly preferred.

As these polycarboxylic acid esters, it is not always necessary to use the above-mentioned polycarboxylic acid esters as starting materials, and these polycarboxylic acid esters are derived during the preparation of the solid titanium catalyst component [A]. A polyvalent carboxylic acid ester may be formed in the step of preparing the solid titanium catalyst component [A] using a compound that can be used.

In the present invention, examples of the electron donor other than the polyvalent carboxylic acid that can be used when preparing the solid titanium-based catalyst [A] include alcohols, amines, amides, ethers, and the like, which will be described later. Ketones, nitriles, phosphines, stippines, arsines, phosphoramides, esters, thioethers, thioesters, acid anhydrides, acid halides, aldehydes, alcoholates, alkoxy (aryloxy) silanes, etc. And amides and salts of metals belonging to Groups I to IV of the Periodic Table.

In the present invention, the solid titanium catalyst component [A] can be produced by bringing the above-mentioned magnesium compound (or metallic magnesium) into contact with an electron donor and a titanium compound. In order to produce the solid titanium catalyst component [A], a known method for preparing a highly active titanium catalyst component from a magnesium compound, a titanium compound, and an electron donor can be employed. The above components may be brought into contact with each other in the presence of another reaction reagent such as silicon, phosphorus, and aluminum.

The method for producing the solid titanium catalyst component [A] will be briefly described below with several examples.

(1) A method of reacting a magnesium compound or a complex compound comprising a magnesium compound and an electron donor with a titanium compound in a liquid phase. This reaction may be performed in the presence of a grinding aid or the like. Further, when reacting as described above, the solid compound may be pulverized. Furthermore, when reacting as described above, each component may be pretreated with an electron donor and / or a reaction assistant such as an organoaluminum compound or a halogen-containing silicon compound. In this method, the electron donor is used at least once.

(2) a liquid magnesium compound having no reducing property;
A method in which a liquid titanium compound is reacted in the presence of an electron donor to precipitate a solid titanium complex.

(3) A method in which a titanium compound is further reacted with the reaction product obtained in (2).

(4) The reaction product obtained in (1) or (2)
A method in which an electron donor and a titanium compound are further reacted.

(5) A solid obtained by pulverizing a magnesium compound or a complex compound comprising a magnesium compound and an electron donor in the presence of a titanium compound is treated with any of a halogen, a halogen compound and an aromatic hydrocarbon. Method. In this method, a magnesium compound or a complex compound comprising a magnesium compound and an electron donor may be ground in the presence of a grinding aid or the like. Also,
A magnesium compound or a complex compound comprising a magnesium compound and an electron donor may be pulverized in the presence of a titanium compound, pre-treated with a reaction aid, and then treated with a halogen or the like. In addition, examples of the reaction assistant include an organic aluminum compound and a halogen-containing silicon compound. In this method, an electron donor is used at least once.

(6) A method of treating the compound obtained in the above (1) to (4) with a halogen, a halogen compound or an aromatic hydrocarbon.

(7) A method of contacting a reaction product of a metal oxide, dihydrocarbylmagnesium and a halogen-containing alcohol with an electron donor and a titanium compound.

(8) A method in which a magnesium compound such as a magnesium salt of an organic acid, alkoxymagnesium, or aryloxymagnesium is reacted with an electron donor, a titanium compound and / or a halogen-containing hydrocarbon.

Among the methods for preparing the solid titanium catalyst component [A] described in the above (1) to (8), a method using a liquid titanium halide during the catalyst preparation, a method using a titanium compound, or a method using a titanium compound In this case, a method using a halogenated hydrocarbon is preferable.

The amount of each of the above components used in preparing the solid titanium catalyst component [A] varies depending on the preparation method and cannot be specified unconditionally. For example, the amount of the electron donor is about 0.01 to 5 per mole of the magnesium compound. Moles, preferably 0.05 to 2 moles, and the titanium compound is used in an amount of about 0.01 to 500 moles, preferably 0.05 to 300 moles.

The solid titanium catalyst component [A] thus obtained
Contains magnesium, titanium, halogen and an electron donor as essential components.

In this solid titanium catalyst component [A], halogen /
The titanium (atomic ratio) is about 4-200, preferably about 5-100, and the electron donor / titanium (molar ratio) is about 0.1-1.
0, preferably about 0.2 to about 6, and magnesium / titanium (atomic ratio) of about 1 to 100, preferably about 2 to 50.

This solid titanium catalyst component [A] contains a magnesium halide having a small crystal size as compared with a commercially available magnesium halide, and usually has a specific surface area of about 50 m ² / g or more, preferably about 60 to 1000 m ² / g, More preferably about 100
~800m is a ² / g. The solid titanium catalyst component [A] does not substantially change its composition by washing with hexane since the above components are integrated to form a catalyst component.

Such a solid titanium catalyst component [A] may be used alone, or may be used after being diluted with an inorganic compound or an organic compound such as a silicon compound, an aluminum compound, or a polyolefin. When a diluent is used, a high catalytic activity is exhibited even if the specific surface area is smaller than the specific surface area described above.

For a method of preparing such a highly active titanium catalyst component, see, for example, JP-A-50-108385 and JP-A-50-126590.
No. 51-20297, No. 51-28189, No. 51
No. 64586, No. 51-92885, No. 51-136625, No. 52-87489, No. 52-100596, No. 52-1
No. 47688, No. 52-104593, No. 53-2580, No. 53-40093, No. 53-40094, No. 53-43
No. 094, No. 55-135102, No. 55-135103, No. 55-152710, No. 56-811, No. 56-119
No. 08, No. 56-18606, No. 58-83006,
JP-A-58-138705, JP-A-58-138706, JP-A-58-138707
JP-A-58-138708, JP-A-58-138709,
Nos. 58-138710, 58-138715, 60-23404
No. 61-21109, No. 61-37802, No. 61
-37803, and the like.

As the organoaluminum compound catalyst component [B], a compound having at least one Al-carbon bond in the molecule can be used. Examples of such a compound include: (i) a compound represented by the general formula R ¹ _m Al (OR ² ) _{n Hp} X _q (wherein R ¹ and R ² each usually have 1 to 15 carbon atoms, preferably 1 to X is a hydrocarbon group containing 4 carbon atoms, which may be the same or different, X represents a halogen atom,
<M ≦ 3, n is 0 ≦ n <3, p is 0 ≦ p <3, and q is 0 ≦
A number of q <3, moreover organic aluminum compound represented by a is) m + n + p + q = 3, a (ii) the general formula M ¹ AlR ¹ ₄ (wherein, M ¹ is Li, Na, K, R ¹ Are the same as those described above), and a complex alkylated product of a Group 1 metal and aluminum.

As the organoaluminum compound belonging to the above (i), the following compounds can be exemplified.

General formula R ¹ _m Al (OR ² ) _3-m (wherein R ¹ and R ² are the same as above. M is preferably 1.5
≦ m ≦ 3), a general formula R ¹ _m AlX _3-m (wherein R ¹ is the same as above; X is a halogen, m is preferably 0 <m <3); and a general formula R ¹ _m AlH _3-m (wherein R ¹ is the same as above; m is preferably 2 ≦ m <3); and a general formula R ¹ _m Al (OR ² ) _n X _q (wherein R ¹ and R ² is the same as above, X is halogen, 0 <
m ≦ 3, 0 ≦ n <3, 0 ≦ q <3, and m + n + q = 3).

As the aluminum compound belonging to (i), more specifically, trialkylaluminums such as triethylaluminum and tributylaluminum; trialkenylaluminums such as triisoprenylaluminum; dialkylaluminum alkoxides such as diethylaluminum ethoxide and dibutylaluminum butoxide Alkyl aluminum sesquialkoxides such as ethyl aluminum sesquiethoxide and butyl aluminum sesquibutoxide, partially alkoxylated alkyl aluminum having an average composition represented by R ¹ _2.5 Al (OR ² ) _0.5 ; diethyl aluminum chloride, dibutyl Dialkylaluminum halides such as aluminum chloride and diethylaluminum bromide; ethylaluminum sesqui Alkyl aluminum sesquihalides such as chloride, butyl aluminum sesquichloride, ethyl aluminum sesquibromide; partially halogenated alkyl aluminum such as alkyl aluminum dihalides such as ethyl aluminum dichloride, propyl aluminum dichloride, butyl aluminum dibromide; diethyl aluminum Dialkylaluminum hydrides such as hydride and dibutylaluminum hydride; other partially hydrogenated alkylaluminums such as alkylaluminum dihydrides such as ethylaluminum dihydride and propylaluminum dihydride; ethylaluminum ethoxycyclolide, butylaluminum butoxycyclolide, ethyl Alcohol such as aluminum ethoxy bromide Shi reduction and halogenated alkylaluminum can be exemplified.

Examples of the compound similar to (i) include an organic aluminum compound in which two or more aluminum atoms are bonded via an oxygen atom or a nitrogen atom. Such compounds include, for example, (C ₂ H ₅ ) ₂ AlOAl (C ₂ H ₅ ) ₂ ,
(C ₄ H ₉ ) ₂ AlOAl (C ₄ H ₉ ) ₂ , Methyl aluminoxane and the like can be mentioned.

As the compound belonging to the above (ii), LiAl (C
_{2 H 5) 4, LiAl (} C 7 H 15) 4 and the like.

Among these, it is particularly preferable to use trialkylaluminum or alkylaluminum to which two or more aluminum compounds described above are bonded.

Examples of the electron donor catalyst component [C] include alcohols,
Oxygen-containing electron donors such as phenols, ketones, aldehydes, carboxylic acids, esters of organic or inorganic acids, ethers, acid amides, acid anhydrides, alkoxysilanes, and nitrogen-containing electron donors such as ammonia, amines, nitriles, and isocyanates Or a polycarboxylic acid ester such as those described above. More specifically, methanol, ethanol, propanol, pentanol,
Hexanol, octanol, dodecanol, octadecyl alcohol, oleyl alcohol, benzyl alcohol, phenylethyl alcohol, cumyl alcohol,
C1-C18 alcohols such as isopropyl alcohol, cumyl alcohol and isopropylbenzyl alcohol; phenol, cresol, xylenol, ethylphenol, propylphenol, nonylphenol,
Phenols having 6 to 20 carbon atoms which may have a lower alkyl group such as cumylphenol and naphthol; acetone,
C3 to C15 ketones such as methyl ethyl ketone, methyl isobutyl ketone, acetophenone, benzophenone and benzoquinone; C2 to C15 aldehydes such as acetaldehyde, propionaldehyde, octylaldehyde, benzaldehyde, trialdehyde and naphthaldehyde; methyl formate , Methyl acetate, ethyl acetate, vinyl acetate, propyl acetate, octyl acetate, cyclohexyl acetate, ethyl propionate, methyl butyrate, ethyl valerate, methyl chloroacetate, ethyl dichloroacetate, methyl methacrylate, ethyl crotonate, ethyl cyclohexanecarboxylate , Methyl benzoate, ethyl benzoate, propyl benzoate, butyl benzoate, octyl benzoate, cyclohexyl benzoate, phenyl benzoate, benzyl benzoate, methyl toluate Chill, ethyl toluate, amyl toluate, ethyl ethyl benzoate, methyl anisate, n-butyl maleate, diisobutyl methylmalonate, di-n-hexyl cyclohexenecarboxylate, diethyl nadic acid, diisopropyl tetrahydrophthalate, diethyl phthalate Organic acid esters having 2 to 30 carbon atoms, such as diisobutyl phthalate, di-n-butyl phthalate, di-2-ethylhexyl phthalate, γ-butyrolactone, δ-valerolactone, coumarin, phthalide, ethylene carbonate; acetyl chloride, benzoyl C2 to C15 acid halides such as chloride, toluic acid chloride and anisic acid chloride; methyl ether, ethyl ether, isopropyl ether, butyl ether, amyl ether, tetrahydrofuran, anisole, diphenyl ether Ethers having 2 to 20 carbon atoms such as; acetamide, benzoic acid amide,
Acid amides such as toluic acid amide; amines such as methylamine, ethylamine, diethylamine, tributylamine, piperidine, tribenzylamine, aniline, pyridine, picoline, tetramethylenediamine; nitriles such as acetonitrile, benzonitrile and tolunitrile; Acid anhydrides such as acetic anhydride, phthalic anhydride and benzoic anhydride are used.

Further, as the electron donor catalyst component [C], an organosilicon compound represented by the following general formula [I] can be used.

R _n Si (OR ′) _4-n [I] wherein R and R ′ are hydrocarbon groups, and 0 <n <4
Specific examples of the organosilicon compound represented by the above general formula [I] include trimethylmethoxysilane,
Trimethylethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, diisopropyldimethoxysilane, t-butylmethyldimethoxysilane, t-
Butylmethyldiethoxysilane, t-amylmethyldiethoxysilane, diphenyldimethoxysilane, phenylmethyldimethoxysilane, diphenyldiethoxysilane, bis-tolyldimethoxysilane, bism-tolyldimethoxysilane, bis-p-tolyldimethoxysilane,
Bis-p-tolyldiethoxysilane, bisethylphenyldimethoxysilane, dicyclohexyldimethoxysilane, cyclohexylmethyldimethoxysilane, cyclohexylmethyldiethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, vinyltrimethoxysilane, methyltrimethoxysilane, n -Propyltriethoxysilane, decyltrimethoxysilane, decyltriethoxysilane, phenyltrimethoxysilane, γ-
Chloropropyltrimethoxysilane, methyltoluethoxysilane, ethyltriethoxysilane, vinyltriethoxysilane, t-butyltriethoxysilane, n-butyltriethoxysilane, iso-butyltriethoxysilane, phenyltriethoxysilane, γ-amino Propyltriethoxysilane, chlorotriethoxysilane, ethyltriisopropoxysilane, vinyltributoxysilane, cyclohexyltrimethoxysilane, cyclohexyltriethoxysilane, 2-norbornanetrimethoxysilane, 2-norbornanetriethoxysilane, 2-norbornanemethyldimethoxy Silane, ethyl silicate, butyl silicate, trimethylphenoxysilane, methyltriallyloxy (allyloxy) silane, vinyl tris (β-methoxyethoxysilane) Vinyltriacetoxysilane, dimethyl tetraethoxy disiloxane is used.

Among them, ethyltriethoxysilane, n-propyltriethoxysilane, t-butyltriethoxysilane, vinyltriethoxysilane, phenyltriethoxysilane, vinyltributoxysilane, diphenyldimethoxysilane, phenylmethyldimethoxysilane, bis-p-tolyldimethoxysilane Preferred are silane, p-tolylmethyldimethoxysilane, dicyclohexyldimethoxysilane, cyclohexylmethyldimethoxysilane, 2-norbornanetriethoxysilane, 2-norbornanemethyldimethoxysilane, and diphenyldiethoxysilane.

Further, as the electron donor catalyst component [C], an organosilicon compound represented by the following general formula [II] can be used.

SiR ¹ R ² _m (OR ³ ) _3-m ... [II] wherein R ¹ is a cyclopentyl group or a cyclopentyl group having an alkyl group, and R ² is an alkyl group, a cyclopentyl group and a cyclopentyl group having an alkyl group Wherein R ³ is a hydrocarbon group, and m is 0 ≦ m ≦ 2. In the formula [II], R ¹ is a cyclopentyl group or a cyclopentyl group having an alkyl group, and as R ¹ , in addition to the cyclopentyl group, a 2-methylcyclopentyl group, a 3-methylcyclopentyl group, a 2-ethylcyclopentyl group And a cyclopentyl group having an alkyl group such as a 2,3-dimethylcyclopentyl group.

In the formula [II], R ² is any one of an alkyl group, a cyclopentyl group and a cyclopentyl group having an alkyl group, and R ² is, for example, a methyl position, an ethyl group, a propyl group, an isopropyl group, a butyl group. group, alkyl groups such as hexyl, or cyclopentyl group having an exemplified cyclopentyl group and an alkyl group as R ¹ can be exemplified similarly.

Further, in the equation [II], R ³ is a hydrocarbon group, R ³
Examples thereof include hydrocarbon groups such as an alkyl group, a cycloalkyl group, an aryl group, and an aralkyl group.

Among these, it is preferable to use an organosilicon compound in which R ¹ is a cyclopentyl group, R ² is an alkyl group or a cyclopentyl group, and R ³ is an alkyl group, particularly a methyl group or an ethyl group.

Specific examples of such organosilicon compounds include trialkoxysilanes such as cyclopentyltrimethoxysilane, 2-methylcyclopentyltrimethoxysilane, 2,3-dimethylcyclopentyltrimethoxysilane, and cyclopentyltriethoxysilane; dicyclopentyldimethoxy Dialkoxysilanes such as silane, bis (2-methylcyclopentyl) dimethoxysilane, bis (2,3-dimethylcyclopentyl) dimethoxysilane and dicyclopentyldiethoxysilane; tricyclopentylmethoxysilane, tricyclopentylethoxysilane, dicyclopentylmethylmethoxy Silane, dicyclopentylethylmethoxysilane, dicyclopentylmethylethoxysilane, cyclopentyldimethylmethoxysilane, cyclopentyldi Chill silane, mono-alkoxysilanes such as cyclopentyl dimethylethoxysilane, and the like.
Among these electron donors, organic carboxylic acid esters or organic silicon compounds are preferable, and organic silicon compounds are particularly preferable.

The olefin polymerization catalyst used in the present invention is formed from the solid titanium catalyst component [A], the organoaluminum compound catalyst component [B], and the electron donor [C] as described above. Using this olefin polymerization catalyst, a higher α-olefin and 4-methylpentene-1
And a non-conjugated diene, and after preliminarily polymerizing an α-olefin or a higher α-olefin using the catalyst for olefin polymerization, a higher α-olefin is used using the catalyst.
An olefin, 4-methylpentene-1 and a non-conjugated diene can be polymerized (main polymerization). During prepolymerization per 1 g of olefin polymerization catalyst, 0.1 to 500 g, preferably
The α-olefin or higher α-olefin is prepolymerized in an amount of 0.3 to 300 g, particularly preferably 1 to 100 g.

In the prepolymerization, a catalyst having a considerably higher concentration than the catalyst concentration in the system in the main polymerization can be used.

The concentration of the solid titanium catalyst component [A] in the prepolymerization is usually about 0.01 to 200 mmol, preferably about 0.1 to 200 mmol, in terms of titanium atom, per inert hydrocarbon medium described later.
It is desirable to set the range to 100 mmol, particularly preferably 1 to 50 mmol.

The amount of the organoaluminum catalyst component [B] may be an amount such that 0.1 to 500 g, preferably 0.3 to 300 g of a polymer is produced per 1 g of the solid titanium catalyst component [A]. About 0.1 to 1 per mole of titanium atom
00 mol, preferably about 0.5-50 mol, particularly preferably 1 mol
Desirably, it is in an amount of 2020 mol.

The electron donor catalyst component [C] is used in an amount of 0.1 to 50 mol, preferably 0.5 to 30 mol, particularly preferably 1 to 10 mol, per 1 mol of titanium atom in the solid titanium catalyst component [A]. Is preferred.

The prepolymerization is preferably performed under mild conditions by adding an olefin or a higher α-olefin and the above-mentioned catalyst component to an inert hydrocarbon medium.

As the inert hydrocarbon medium used at this time, specifically, aliphatic hydrocarbons such as propane, butane, pentane, hexane, heptane, octane, decane, dodecane and kerosene; cyclopentane, cyclohexane, methylcyclopentane, etc. Alicyclic hydrocarbons; aromatic hydrocarbons such as benzene, toluene and xylene; halogenated hydrocarbons such as ethylene chloride and chlorobenzene, and mixtures thereof. Among these inert hydrocarbon media, it is particularly preferable to use an aliphatic hydrocarbon. Preliminary polymerization can be carried out using olefin or higher α-olefin itself as a solvent.

The linear higher α-olefin used in the prepolymerization is
It may be the same as or different from the linear higher α-olefin used in the main polymerization described below.

The reaction temperature during the prepolymerization is usually about -20 to + 100 ° C,
Preferably about -20 to + 80 ° C, more preferably 0 to +40
It is desirable to be in the range of ° C.

In the prepolymerization, a molecular weight regulator such as hydrogen can be used. Such molecular weight regulators are
It is desirable to use the polymer in an amount such that the intrinsic viscosity [η] of the polymer obtained by the prepolymerization measured in a decalin solvent at 135 ° C. is about 0.2 dl / g or more, preferably about 0.5 to 10 dl / g.

As described above, the prepolymerization is desirably carried out so as to produce about 0.1 to 500 g, preferably about 0.3 to 300 g, particularly preferably 1 to 100 g of polymer per 1 g of the solid titanium catalyst component [A]. If the prepolymerization amount is too large, the production efficiency of the olefin polymer may decrease.

The prepolymerization can be performed in a batch system or a continuous system.

The olefin polymerization catalyst is preliminarily polymerized as described above, and is formed from the obtained solid titanium catalyst component [A], organoaluminum catalyst component [B], and electron donor catalyst component [C]. Copolymerization (main polymerization) of a linear higher α-olefin, 4-methylpentene-1 and a non-conjugated diene is performed in the presence of an olefin polymerization catalyst.

Linear higher α-olefin and 4-methylpentene
In the case of copolymerization of 1 with a non-conjugated diene (main polymerization), in addition to the olefin polymerization catalyst, an organoaluminum compound used as a component of the olefin polymerization catalyst as an organoaluminum compound catalyst component Catalyst component [B]
The same as described above can be used. In addition, linear higher α
In the case of copolymerization (main polymerization) of olefin, 4-methylpentene-1 and non-conjugated diene, an electron donor used as a component of an electron donor catalyst when producing a catalyst for olefin polymerization. The same components as those of the catalyst component [C] can be used.
The organoaluminum compound and the electron donor used in the copolymerization (main polymerization) of methylpentene-1 and a non-conjugated diene are not necessarily the same as the organoaluminum compound used in preparing the olefin polymerization catalyst. It need not be the same as the electron donor.

Linear higher α-olefin and 4-methylpentene
The copolymerization of 1 with a non-conjugated diene (main polymerization) is usually performed in a liquid phase.

As the reaction solvent for the main polymerization, the above-mentioned inert hydrocarbon can be used, and an olefin that is liquid at the reaction temperature can also be used.

Linear higher α-olefin and 4-methylpentene
1 and a non-conjugated diene (main polymerization), the solid titanium catalyst component [A] is usually about 0.001 to about 1.0 mmol, preferably about 0.005 to Used in an amount of 0.5 mmol. The metal component of the organoaluminum compound catalyst component [B] is usually about 1 mol per 1 mol of the titanium atom in the solid titanium catalyst component [A].
It is used in an amount such that it becomes 20002000 mol, preferably about 5-500 mol. Further, the electron donor catalyst [C] is usually used in an amount of about 0.001 to 10 mol, preferably about 0.01 to 2 mol, per 1 mol of metal atom in the organoaluminum compound catalyst component [B].
Mole, particularly preferably about 0.05 to 1 mole.

When hydrogen is used during the main polymerization, the molecular weight of the obtained polymer can be adjusted.

In the present invention, a linear higher α-olefin and
The polymerization temperature of methylpentene-1 and a non-conjugated diene is
Usually about 20-200 ° C., preferably about 40-100 ° C., the pressure is usually normal pressure to 100 kg / cm ² , preferably normal pressure to 50 kg / cm
Set to ² . In the copolymerization (main polymerization) of a linear higher α-olefin, 4-methylpentene-1, and a non-conjugated diene, the polymerization is carried out by any of a batch system, a semi-continuous system, and a continuous system. be able to. Further, the polymerization can be carried out in two or more stages by changing the reaction conditions.

The higher α-olefin copolymer of the present invention obtained by the above polymerization has dynamic fatigue resistance, heat resistance, ozone resistance,
Used as a polymer selected for its low-temperature properties. In particular, when applied to resin modifiers and various rubber products, they exhibit their characteristics to the fullest.

As the resin modifier, for example, a modifier such as polypropylene, polyethylene, or polystyrene can be used. When the higher α-olefin copolymer of the present invention is added to these resins, impact resistance and stress crack resistance can be drastically improved.

Although various rubber products are generally used in a vulcanized state, the higher α-olefin-based copolymer of the present invention further exhibits its properties when used in a vulcanized state. When the higher α-olefin-based copolymer of the present invention is used as various rubber products, the vulcanized product is prepared in the same manner as when vulcanizing a general rubber, and then an unvulcanized compounded rubber is prepared once. It is produced by molding a compounded rubber into an intended shape followed by vulcanization.

As a vulcanization method, a method of heating using a vulcanizing material,
Either a method of irradiating with an electron beam may be adopted.

Examples of the vulcanizing material used for vulcanization include sulfur compounds and organic peroxides. Specific examples of the sulfur compound include sulfur, sulfur chloride, sulfur dichloride, morpholine disulfide, alkylphenol disulfide, tetromethylthiuram disulfide, selenium dimethyldithiocarbamate, and the like. Of these, sulfur is preferably used. The sulfur compound is used in an amount of 0.05 to 10 parts by weight, preferably 0.1 to 5 parts by weight, based on 100 parts by weight of the higher α-olefin copolymer of the present invention. As the organic peroxide, specifically, dicumyl peroxide, 2,5-dimethyl-2,5-di (tert-butylperoxy) hexane, 2,5-dimethyl-
2,5-di (benzoylperoxy) hexane, 2,5-dimethyl-2,5-di (tert-butylperoxy) hexyne-
3, di-tert-butyl peroxide, di-tert-butyl peroxide-3,3,5-trimethylcyclohexane, tert-butyl hydroperoxide and the like. Among them, dicumyl peroxide, di-tert-butyl peroxide and di-tert-butylperoxy-3,3,5-trimethylcyclohexane are preferably used. The organic peroxide is the higher α-
3 × 10 ^{-4 to} 5 × 10 ^-2 per 100 g of olefin-based copolymer
Moles, preferably 1 × 10 ^{−3 to} 3 × 10 ⁻² moles.

When using a sulfur compound as a vulcanizing agent,
It is preferable to use a vulcanization accelerator in combination. Specific examples of the vulcanization accelerator include N-cyclohexyl-2-benzothiazolesulfenamide, N-oxydiethylene-2
-Benzothiazolesulfenamide, N, N-diisopropyl-2-benzothiazolesulfenamide, 2-
Thiazole compounds such as mercaptobenzothiazole, 2- (2,4-dinitrophenyl) mercaptobenzothiazole, 2- (2,6-diethyl-4-morpholinothio) benzothiazole, dibenzothiazyldisulfide;
Guanidine-based compounds such as diphenylguanidine, triphenylguanidine, diorthotolylguanidine, orthotolyl by guanide, diphenylguanidine phthalate; aldehydes such as acetaldehyde-aniline reactant, butyraldehyde-aniline condensate, hexamethylenetetramine, and acetaldehyde ammonia Amine or aldehyde-ammonia compounds; imidazoline compounds such as 2-mercaptoimidazoline; thiourea compounds such as thiocarbanilide, diethylthiourea, dibutylthiourea, trimethylthiourea, diorthotolylthiourea; tetramethylthiuram monosulfide, tetramethylamine Methylthiuram disulfide, tetraethylthiuram disulfide, tetrabutylthiuram disulfide, pen Thiuram-based compounds such as methylenethiuram tetrasulfide; zinc dimethyldithiocarbamate, zinc diethylthiocarbamate, zinc di-n-butyldithiocarbamate, zinc ethylphenyldithiocarbamate, zinc butylphenyldithiocarbamate, sodium dimethyldithiocarbamate, dimethyldithiocarbamate Dithioate compounds such as selenium and tellurium diethyldithiocarbamate; xanthate compounds such as zinc dibutylxanthate; and compounds such as zinc white. These vulcanization accelerators are used in an amount of 0.1 to 20 parts by weight, preferably 0.2 to 10 parts by weight, based on 100 parts by weight of the higher α-olefin copolymer.

When an organic peroxide is used as a vulcanizing agent, it is preferable to use a vulcanizing aid in combination. Specific examples of the vulcanization aid include quinone dioxime compounds such as sulfur and p-quinone dioxime; methacrylate compounds such as polyethylene glycol dimethacrylate; allyl compounds such as diallyl phthalate and triallyl cyanurate; Other maleimide compounds include divinylbenzene. Such a vulcanization aid is used in an amount of 1/2 to 2 mol, preferably about an equimolar, relative to 1 mol of the organic peroxide used.

When using an electron beam without using a vulcanizing agent as the vulcanization method, 0.1 to 1 to the molded unvulcanized compounded rubber described later
0 MeV (mega electron volts), preferably 0.3-20M
Absorbed dose of 0.5 to 35 Mrad for electrons with eV energy
(Megarad), preferably 0.5 to 10 Mrad. At this time, a vulcanization aid may be used in combination with an organic peroxide as a vulcanizing agent, and the amount thereof is 1 × 10 ^{-4 based on} 100 g of the higher α-olefin copolymer of the present invention.
１1 × 10 ^-1 mol, preferably 1 × 10 ^{-3 to} 3 × 10 ^-2 mol.

The unvulcanized compounded rubber is prepared by the following method, i.e., using a mixer such as a Banbury mixer to obtain a higher α-
After kneading the olefin copolymer, filler, and softener at a temperature of 80 to 170 ° C. for 3 to 10 minutes, use a roll such as an oven roll, and use a vulcanizing agent and, if necessary, vulcanization acceleration. And a vulcanizing aid, and mix at a roll temperature of 40-80 ° C.
After kneading for ~ 30 minutes, the mixture is dispensed to prepare a ribbon or sheet compound rubber.

The compounded rubber thus prepared is formed into an intended shape by an extruder, a calender roll, or a press.
A vulcanized product can be obtained by heating at a temperature of 0 to 270 ° C. for 1 to 30 minutes, or by irradiating with an electron beam by the method described above. In this vulcanization step, a mold may be used, or vulcanization may be performed without using a mold. When a mold is not used, the steps of molding and vulcanization are usually performed continuously. As a heating method in the vulcanization tank, a heating tank such as hot air, a fluidized bed of glass beads, UHF (ultra-high frequency electromagnetic wave), and steam can be used.

Of course, when vulcanization is performed by electron beam irradiation, a compounded rubber containing no compounding agent is used.

The rubber vulcanizates produced as described above are used in themselves to manufacture anti-vibration rubber, automatic industrial parts such as cover materials for tire vibration parts, industrial rubber products such as rubber rolls and belts, electrical insulation materials, and civil engineering building materials. , Rubber-coated cloth, etc. When a foaming agent is blended with the unvulcanized compounded rubber and foamed by heating, a foamed material can be obtained, and this foamed material can be used for applications such as a heat insulating material, a cushion material and a sealing material.

Effect of the Invention The higher α-olefin-based copolymer according to the present invention comprises a specific linear higher α-olefin and 4-methylpentene-
1 and a specific non-conjugated diene,
The molar ratio of olefin to 4-methylpentene-1 (linear higher α-olefin / 4-methylpentene-1) is in a specific range, a specific iodine value, a specific intrinsic viscosity [η] and Since it has a specific crystallinity, it has excellent weather resistance, ozone resistance, heat aging resistance, and low-temperature properties, and also has the effect of being excellent in dynamic fatigue resistance. You can get things.

According to the manufacturing method of the present invention. Efficiently produce a higher α-olefin copolymer having the above effects,
It can be produced in high yield.

Hereinafter, the present invention will be described with reference to examples, the present invention,
It is not limited to these examples.

Example 1 (Preparation of solid titanium catalyst component [A]) 95.2 g of anhydrous magnesium chloride, 442 ml of decane and 2-
After 390.6 g of ethylhexyl alcohol was heated and reacted at 130 ° C. for 2 hours to form a homogeneous solution, 21.3 g of phthalic anhydride was added to the solution, and the mixture was further stirred and mixed at 130 ° C. for 1 hour. Was dissolved in this homogeneous solution. After cooling the homogeneous solution thus obtained to room temperature, 75 ml of this homogeneous solution was maintained at -20 ° C.
The whole amount was dropped in 200 ml over 1 hour. After completion of the charging, the temperature of the mixture was raised to 110 ° C. over 4 hours, and when the temperature reached 110 ° C., diisobutyl phthalate 5.2
2 g was added, and the mixture was kept under stirring at the same temperature for 2 hours. After completion of the reaction for 2 hours, a solid portion was collected by hot filtration,
After this solid portion was resuspended in 275 ml of titanium tetrachloride, a heating reaction was performed again at 110 ° C. for 2 hours. After the completion of the reaction, the solid portion was collected again by hot filtration, and sufficiently washed with decane and hexane at 110 ° C. until no free titanium compound was detected in the washing solution. The solid titanium catalyst component [A] prepared by the above operation was stored as a decane slurry, and a part of this was dried for the purpose of examining the catalyst composition. The composition of the solid titanium catalyst component [A] thus obtained was composed of 2.5% by weight of titanium, 63.9% by weight of chlorine, 20.9% by weight of magnesium and 1% by weight of diisobutyl phthalate.
2.7% by weight.

(Polymerization) 200 ml of decane, 30 ml of octene-1 and 20 ml of 4-methylpentene-1 in a 500 ml polymerization vessel equipped with a stirring blade, 7-
1 ml of methyl-1,6-octadiene was charged. The temperature of this solution was raised to 50 ° C., and hydrogen and nitrogen were continuously introduced into the solution at a rate of 3, 50 per hour, respectively.
After the temperature was raised, 0.625 mmol of triisobutylaluminum, 0.21 mmol of trimethylethoxysilane, and 0.013 mmol of solid titanium catalyst component [A] in terms of titanium atoms were charged to initiate polymerization. After performing polymerization at 50 ° C. for 30 minutes, a small amount of isobutyl alcohol was added to terminate the polymerization, and then the polymerization solution was poured into a large amount of methanol to precipitate a copolymer. Next, after recovering the precipitated copolymer, it was dried under reduced pressure at 100 ° C. for 24 hours to obtain 12.3 g of 4-methylpentene-1-octene-1,7-methyl-.
A 1,6-octadiene copolymer was obtained. Octene-1 and 4-methylpentene-1 constituting the obtained copolymer
And the molar ratio (octene-1 / 4-methylpentene-1) is 7
3/27 with an iodine value of 6.2 and 135 ° C in decalin
Was 4.7 dl / g, and the crystallization temperature was 0% as measured by X-ray diffraction.

Examples 2 to 5 In Example 1, copolymerization was carried out in the same manner as in Example 1 except that the monomers and polymerization conditions were changed as shown in Table 1 to obtain copolymers shown in Table 1.

Example 6 Octene-1, 4-methylpentene-1, 7
A copolymerization reaction with -methyl-1,6-octadiene was carried out.

That is, a decane solution of octene-1, 4-methylpentene-1 and 7-methyl-1,6-octadiene was supplied from the upper part of the polymerization reactor to a concentration of 69 g / octene-1 in the polymerization reactor.
The concentration of 4-methylpentene-1 in the polymerization vessel was 16 g /
, So that the concentration of 7-methyl-1,6-octadiene in the polymerization vessel becomes 5.3 g / h, a decane slurry solution of a solid titanium catalyst component [A] was used as a catalyst. To 0.07 mmol / h.
4. The decane solution of triisobutylaluminum is adjusted to 0.8 / h so that the aluminum concentration in the polymerization vessel becomes 3.5 mmol /, and the decane solution of trimethylmethoxysilane is adjusted to 0.7 mmol / in the polymerization vessel. Each was continuously fed into the polymerization reactor at a rate of 0.8 per hour. On the other hand, the polymerization solution in the polymerization vessel was continuously withdrawn from the lower part of the polymerization vessel so that the polymerization liquid was always 2. From the top of the polymerization vessel, hydrogen was supplied at a rate of 3 per hour, and nitrogen was supplied at a rate of 50 per hour. The copolymerization reaction was carried out at 50 ° C. by circulating warm water through a jacket attached to the outside of the polymerization vessel.

Next, a small amount of methanol was added to the polymerization solution extracted from the lower part of the polymerization vessel to stop the copolymerization reaction, and the polymerization solution was poured into a large amount of methanol to precipitate a copolymer. After thoroughly washing the copolymer with methanol, 140 ° C
And dried under reduced pressure all day and night to obtain a 4-methylpentene-1-octane-1.7-methyl-1,6-octadiene copolymer at a rate of 124 g / h.

The molar ratio (octene-1 / 4-methylpentene-1) of octane-1 and 4-methylpentene-1 constituting the obtained copolymer is 76/24, the iodine value is 12.4, The intrinsic viscosity [η] measured in decalin at 135 ° C. was 3.7, and the crystallinity measured by X-ray diffraction was 0%.

Example 7 The 4-methylpentene-1-octene-1,7-methyl-1,6-octadiene copolymer produced in Example 1 was kneaded with an 8-inch open roll according to Table 2 to obtain an unvulcanized product. A compounded rubber was obtained.

The compounded rubber was heated by a press heated to 160 ° C. for 20 minutes to prepare a vulcanized sheet, and the following test was performed. The test items are as follows.

[Test items] Tensile test, hardness test, ozone resistance test, aging test, bending test.

[Test Methods] Tensile tests, hardness tests, ozone resistance tests, aging tests, and bending tests were measured according to JIS K6301. That is, tensile strength (T _B ) and elongation (E _B ) in the tensile test, and H _S J in the hardness test
The IS A hardness was measured. The ozone resistance test is performed in an ozone test tank. The conditions are: ozone concentration 50pphm
The static test was performed in a 40 ° C. atmosphere for 200 hours. The evaluation was performed according to JIS K 6301 standards for the surface condition. In the aging test, an air heating aging test was performed at 120 ° C. for 70 hours. A tensile test is performed after the aging test, and the retention rate for the physical properties before aging,
In other words, tensile strength retention A _R (T _B ), elongation retention A _R (E _B )
I asked. The bending test examined the resistance to crack growth with a dematcher tester. That is, the number of times of bending until the crack became 15 mm was measured.

 Table 3 shows the results.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a process for preparing an olefin polymerization catalyst used when producing a higher α-olefin-based copolymer according to the present invention.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Keiji Okada 3 Chigusa Coast, Ichihara City, Chiba Prefecture Mitsui Petrochemical Industry Co., Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) C08F 210/14 C08F 4/654 REGISTRY (STN) CA (STN)

Claims (2)

(57) [Claims] 1. A copolymer comprising a linear higher α-olefin having 6 to 20 carbon atoms, 4-methylpentene-1 and a non-conjugated diene represented by the following general formula [I]:
(A) the molar ratio of linear higher α-olefin to 4-methylpentene-1 (linear higher α-olefin / 4-methylpentene-1) is in the range of 50/50 to 95/5; , (B)
Iodine value is in the range of 2 to 40; (c) intrinsic viscosity [η] measured in decalin solvent at 135 ° C. is in the range of 1.0 to 10.0 dl / g; (d) X-ray diffraction method A higher α-olefin copolymer having a measured crystallinity of 5% or less; (In the formula, n is an integer of 1 to 5, R ¹ is an alkyl group having 1 to 4 carbon atoms, R ² and R ³ are a hydrogen atom or 1 to 8 carbon atoms.
Represents an alkyl group. However, R ₂ and R ³ are not both hydrogen atoms. ) 2. A catalyst comprising: [A] a solid titanium catalyst component containing magnesium, titanium, halogen and an electron donor as essential components; [B] an organoaluminum compound catalyst component; and [C] an electron donor catalyst component. A linear higher α-olefin having 6 to 20 carbon atoms, 4-methylpentene-1 and a non-conjugated diene represented by the following general formula [I] are copolymerized in the presence of an olefin polymerization catalyst. (A) the molar ratio of linear higher α-olefin to 4-methylpentene-1 (linear higher α-olefin / 4-methylpentene-1) is in the range of 50/50 to 95/5; Yes, (b)
Iodine value is in the range of 2 to 40; (c) intrinsic viscosity [η] measured in decalin solvent at 135 ° C. is in the range of 1.0 to 10.0 dl / g; (d) X-ray diffraction method Obtaining a higher α-olefin-based copolymer having a measured crystallinity within a range of 5% or less; (In the formula, n is an integer of 1 to 5, R ¹ is an alkyl group having 1 to 4 carbon atoms, R ² and R ³ are a hydrogen atom or 1 to 8 carbon atoms.
Represents an alkyl group. However, R ₂ and R ³ are not both hydrogen atoms. )