JP5322681B2 - Process for the production of stabilized polymers - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a polymer by using a metallocene catalyst causing no influence on the catalyst activity even when it is added before the polymerization, on the polymerization under a favorable control of the molecular weight distribution and stereoregularity with the metallocene catalyst, and providing the polymer excellent in color tone and stability. <P>SOLUTION: When monomers having ethylenically unsaturated bonds are polymerized with a metallocene catalyst comprising a transition metal, one or more kinds of stabilizers are mixed with an organic aluminum in advance, then added to the catalyst system or the polymerization system before the polymerization, thereby being produced a stabilized polymer. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention provides a polymer stabilized with less energy consumption by adding a stabilizer treated with organoaluminum before polymerization with a metallocene catalyst to a catalyst feed tank or polymerization apparatus. It relates to a method of manufacturing.

  Since polymers deteriorate with heat and light, it is common practice to add phenolic antioxidants, phosphorus antioxidants, sulfur antioxidants, hydroxylamine compounds, hindered amine compounds, UV absorbers, acid scavengers, etc. It has been broken.

  For polyolefins, long-term stability can be achieved by blending various stabilizers with those obtained as a fine powder polymer by using a Ziegler catalyst and molding them into granules that are easy to handle with a granulator. Has been planned.

  However, in recent high activity catalysts, it is possible to obtain a granular polymer directly, and it is not possible to melt and knead various stabilizers after polymerization for stabilization because it consumes a lot of energy. In some cases, the stabilizer was added more than necessary to cope with the poor dispersion of the stabilizer. Furthermore, since it cannot be obtained in the form of powder in solution polymerization, it is preferable to blend the stabilizer at the time of polymerization. However, since part of the stabilizer is fed back to the polymerization apparatus when the solvent or monomer is recovered and reused, the polymerization is inhibited. There is a problem that a stabilizer that causes oxidization cannot be blended during polymerization.

  In the polymerization method in which a granular polymer is directly obtained, it is possible to disperse the stabilizer uniformly before the polymerization and during the polymerization, and the kneading step can be omitted. , Patent Document 3, Patent Document 4, Patent Document 5, and the like.

  Patent Document 1 proposes to add a hindered amine compound during the polymerization of the olefin polymer by the Ziegler-Natta catalyst or at the end of the polymerization, and has a stabilizing effect superior to that of adding a phenolic antioxidant during the polymerization. It has been shown that

  Patent Document 2 discloses that the antioxidant is uniformly and uniformly bonded in the polymer particles by polymerizing α-olefin in the presence of a phosphorus-based antioxidant, and has a stabilizing effect superior to post-addition. It has been shown that an extruder or the like for mixing with an antioxidant can be eliminated.

  Patent Document 3 proposes that a hindered amine compound and a phosphorus-based antioxidant are used in combination in an olefin polymer polymerization zone. It was shown that there was an excellent stabilizing effect compared to the addition of a hindered amine compound alone.

  In Patent Document 4, by using a catalyst using a specific ether compound, an excellent stabilization effect is obtained when a phenolic antioxidant is used during polymerization, and the activity of the polymerization catalyst is reduced, the resin is colored, and the like. It was shown that there was no problem.

  Patent Document 5 shows that by using a specific phosphorus antioxidant during polymerization, a polymer excellent in coloring in contact with water can be obtained without inhibiting the polymerization of olefins.

  Each of the above proposals specifically describes the polymerization using a Ziegler-Natta catalyst or a Philips catalyst. However, Patent Document 6 discloses at least one of a phosphorus compound, a sterically hindered amine, a sterically hindered phenol, or an acid scavenger. A method for producing an olefin polymer that is added and polymerized on a transition metallocene catalyst has been proposed. However, phosphorus compounds and sterically hindered amines are carried out only when at least 0.1% of the total conversion has already occurred.

  As is apparent from the above prior art, the addition of a stabilizer during actual polymerization has advantages such as the elimination of the stabilizer blending step by post-polymerization processing, but it can reduce the activity of the polymerization catalyst, And stabilizers coordinate to color the polymer. For this reason, the structure of the catalyst is limited and the polymerization activity and specificity to the stereoregularity of the catalyst are restricted, and addition during the polymerization is required, making it difficult to set and manage the polymerization conditions. was there. In particular, in the continuous polymerization method, a reactor for prepolymerization is used in an existing apparatus.

  As for the phenol-based antioxidant, the compound described in Patent Document 6 can be added before polymerization, but a general-purpose tetrakis (3- (3,5-ditertiarybutyl-4-hydroxyphenyl) is used as a polyolefin. Since compounds having an ester bond such as) propionyloxymethyl) methane decrease the catalytic activity, they were not suitable for addition before polymerization.

Claims of Japanese Patent Application Laid-Open No. 61-181803 Claims of JP-A-63-92613 Claims of JP-A-2-53804 Claims of JP-A-5-271335 Claims of JP-A-8-208731 Claims of JP-A-9-12621

  A polymer using a metallocene catalyst that is excellent in color tone and stability of the resulting polymer without affecting the catalytic activity even when added before polymerization during polymerization with a metallocene catalyst that is advantageous for controlling molecular weight distribution and stereoregularity The manufacturing method of this was desired.

  As a result of intensive studies in view of the above-mentioned present situation, the present inventors have added at least one kind of stabilizer pre-mixed with organoaluminum before the start of polymerization of the transition metal metallocene catalyst, so as not to inhibit the polymerization. The present inventors have found that a polymer having excellent stability can be obtained by a simple process without the need for preliminary polymerization.

That is, in the present invention, when a monomer having an ethylenically unsaturated bond is polymerized using a metallocene catalyst made of a transition metal, one or more phenolic antioxidants having a tertiary butyl group and a carbonyl group are trialkylated. Provided is a method for producing a stabilized polymer, which is previously mixed with an aluminum compound and then added to a catalyst system or a polymerization system before polymerization.

  According to the present invention, in a polymerization reaction using a transition metal metallocene catalyst, a resin additive can be blended into a resin efficiently and uniformly by adding a resin additive with existing equipment before polymerization.

  Examples of the transition metal metallocene catalyst used in the present invention include transition metal metallocene catalysts described in JP-A-9-12621, JP-A-5-043616, JP-A-5-295022, and JP-A-5. No. -301917, JP-A-6-239914, JP-A-6-239915, JP-A-6-239917, JP-A-7-082311, JP-A-7-228621, JP-A-7-330820. No. 8, JP-A-8-059724, JP-A-8-085707, JP-A-8-085708, JP-A-8-127613, JP-A-10-226712, JP-A-10-259143. JP-A-10-265490, JP-A-11-246582, JP-A-11-279189 JP, JP-A-11-349633, JP-A-2000-229990, JP-A-2001-206914, JP-A-2002-37795, JP-A-2002-194015, JP-A-2002-194016, Examples thereof include transition metal metallocene catalysts mainly used for polymerization of polypropylene described in JP-T 2002-535339, WO 99/37654, WO 99/45014 and WO 00/8036.

More specifically, the transition metal metallocene catalyst described in JP-A-9-12621 is the following compound. The following formula:
{[(R ₁ ) (R ₂ M) _a ] ^{an +} an / q [LQ _m ] ^q− } (A)
[Wherein, a represents 1 or 2, n and q each independently represent an integer of 1 to 4, and M represents a monovalent to tetravalent group belonging to groups 4 to 11 of the periodic table of elements. Represents a cation of a valent metal, m represents an integer corresponding to the valence L + q, Q represents a halogen atom, L represents a divalent to heptavalent metal or nonmetal, R ₁ represents π-arene, and R ₂ represents π-arene or an anion of π-arene)
It is a compound represented by these. Particularly suitable π-arenes R ₁ and R ₂ are aromatic groups having 6 to 24 carbon atoms or heteroaromatic groups having 3 to 30 carbon atoms, these groups being Or more, the same or different monovalent group, for example, a halogen atom (preferably a chlorine atom or a bromine atom), an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, a cyano group , An alkylthio group having 1 to 8 carbon atoms, a monocarboxylic acid alkyl ester group having 2 to 6 carbon atoms, a phenyl group, an alkanoyl group having 2 to 5 carbon atoms, or a benzoyl group. These π-arene groups may be monocyclic, fused polycyclic or non-fused polycyclic systems, in which the ring is directly or bridging, such as a —S— group or — It may be bonded via an O-group. R ₂ as an anion of π-arene may be an anion of the above kind π-arene, such as an indenyl anion, and in particular a cyclopentadienyl anion, said anion also being one or more times, Substituted by the same or different monovalent group, for example, an alkyl group having 1 to 8 carbon atoms, a monocarboxylic acid alkyl ester group having 2 to 6 carbon atoms, a cyano group, an alkanoyl group having 2 to 5 carbon atoms or a benzoyl group It may be.

  The alkyl substituent, alkoxy substituent, alkylthio substituent, monocarboxylic acid alkyl ester substituent and alkanoyl substituent may be linear or branched. Representative alkyl substituents, alkoxy substituents, alkylthio substituents, monocarboxylic acid alkyl ester substituents and alkanoyl substituents are methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl. Group, tert-butyl group, n-pentyl group, n-hexyl group and n-octyl group, methoxy group, ethoxy group, n-propoxy group, isopropoxy group, n-butoxy group, n-hexyloxy group and n- Octyloxy group, methylthio group, ethylthio group, n-propylthio group, isopropylthio group, n-butylthio group, n-pentylthio group and hexylthio group, carboxylic acid methyl ester group, carboxylic acid ethyl ester group, carboxylic acid n-propyl ester Group, carboxylic acid isopropyl ester group, carboxylic acid n-butyl ester And carboxylic acid n- pentyl ester group, and an acetyl group, a propionyl group, a butyryl group and valeroyl group. Of these, preferred are alkyl groups having 1 to 4 carbon atoms, particularly 1 or 2 carbon atoms in the alkyl moiety, alkoxy groups, alkylthio groups and monocarboxylic acid alkyl ester groups, and 2 An alkanoyl group having 1 or 3 carbon atoms. Preferred anion of substituted π-arene or substituted π-arene is the above-mentioned substituent, especially chlorine atom or bromine atom, methyl group, ethyl group, methoxy group, ethoxy group, cyano group, carboxylic acid methyl ester group or carboxylic acid ethyl ester A group and one or two acetyl groups.

The π-arenes R ₁ and R ₂ may be the same or different. Suitable heteroaromatic π-arenes are systems containing S, N and / or O atoms. Heteroaromatic π-arenes containing S and / or O atoms are preferred.

  Suitable examples of π-arene are benzene, toluene, xylene, ethylbenzene, methoxybenzene, ethoxybenzene, dimethoxybenzene, p-chlorotoluene, chlorobenzene, bromobenzene, dichlorobenzene, acetylbenzene, trimethylbenzene, trimethoxybenzene, naphthalene, 1,2-dihydronaphthalene, 1,2,3,4-tetrahydronaphthalene, methylnaphthalene, methoxynaphthalene, ethoxynaphthalene, chloronaphthalene, bromonaphthalene, biphenyl, indene, biphenylene, fluorene, phenanthrene, anthracene, 9,10-dihydro Anthracene, triphenylene, pyrene, naphthalene, coronene, thiophene, chromene, xanthene, thioxanthene, benzothiophene, naphthothio E down, thianthrene, diphenylene oxide, diphenylene sulfide, acridine and carbazole.

When a represents 2, R ₂ preferably in each case represents the anion of the π-arene and M in each case represents the same metal atom. Examples of substituted π-arene anions are methyl-, ethyl-, n-propyl- and n-butylcyclopentadiene anions; dimethylcyclopentadiene, cyclopentadiene carboxylic acid methyl and ethyl esters, and also acetylcyclopentadiene, Anion of propionylcyclopentadiene, cyanocyclopentadiene and benzoylcyclopentadiene. Preferred anions are those of unsubstituted indene, and in particular those of unsubstituted cyclopentadiene.

Preferably a represents 1 and R ₂ represents benzene, toluene, xylene, methoxybenzene, chlorobenzene, p-chlorotoluene, naphthalene, methylnaphthalene, chloronaphthalene, methoxynaphthalene, biphenyl, indene, pyrene or diphenylene sulfide. And R ₂ represents an anion of cyclopentadiene, acetylcyclopentadiene or indene, or benzene, toluene, xylene, trimethylbenzene, naphthalene or methylnaphthalene.

Particularly preferred complexes of the formula (A) are those in which a represents ₁ , R ₁ represents η ⁶ -pyrene or η ⁶ -naphthalene, and R ₂ represents an anion of η ⁵ -cyclopentadiene, Complexes in which n preferably represents 1 or 2, in particular 1 and q preferably represents 1. M is, for example, Ti ²⁺ , Ti ³⁺ , Ti ⁴⁺ , Zr ⁺ , Zr ²⁺ , Zr ³⁺ , Zr ⁴⁺ , Hf ⁺ , Hf ²⁺ , Hf ³⁺ , Hf ⁴⁺ , Nb ⁺ , Nb ²⁺ , Nb ³⁺ , Cr ⁺ , Mo ⁺ , Mo ²⁺ , W ⁺ , W ²⁺ , Mn ⁺ , Mn ²⁺ , Re ⁺ , Fe ²⁺ , Co ²⁺ , Co ³⁺ , Ni ²⁺ or Cu ²⁺ . M is preferably a titanium cation, zirconium cation or hafnium cation, especially a titanium cation or zirconium cation, and particularly preferably Ti ⁴⁺ or Zr ⁴⁺ .

  Examples of suitable metals or non-metals L are Sb, Fe, Sn, Bi, Al, Ga, In, Ti, Zr, Sc, V, Cr, Mn and Cu; lanthanides such as Ce, Pr and Nd, or actinides such as Th , Pa, U or Np. Particularly suitable non-metals are B, P and As. L is preferably P, As, B or Sb, and it is particularly preferable to use P.

The complex anion [Lq _m ] ^q− is, for example, BF ₄ ⁻ , PF ₆ ⁻ , AsF ₆ ⁻ , SbF ₆ ⁻ , FeCl ₄ ⁻ , SnCl ₆ ⁻ , SbCl ₆ ⁻ and BiCl ₆ ⁻ . Particularly preferred complex anions are SbF ₆ ⁻ , BF ₄ ⁻ , AsF ₆ ⁻ and PF ₆ ⁻ .

The compound represented by the formula (A) is a known method, for example, the following formula:
{[(R ₁ ) (R ₂ M) _a ] ^{an +} an / q [X] ^q− } (B)
Can be prepared by reacting a salt of an anion [LQ _m ] ^q- [wherein a, m, n, q, R ₁ , R ₂ , M and L are represented by the formula ( It represents the same meaning as defined in A), and [X] ^q− represents an anion different from [LQ _m ] ^q− ].

Compound represented by formula (B) and the following formula:
{[(R ₁ ') (R ₂ M) _a ]} (C)
[Wherein a and M have the same meaning as defined above, and R ₁ 'represents a π-arene or an anion of π-arene, and R ₂ represents a π-arene] Can be produced by reacting the same or different π-arene with a salt of a metal belonging to Group 4 to Group 11 of the Periodic Table in the presence of a Lewis acid. The compounds of the formulas (A), (B) and (C) can also be converted to π-arene [this is different from R ₁ and / or R ₂ or R ₁ ′ in the presence of a Lewis acid. It is suitable for carrying out ligand exchange. In these cases, n preferably represents 2 and particularly preferably represents 1.

The compound represented by the formula (A) (wherein L represents a metal) is the same or different π-arene in the presence of a Lewis acid, and is formed of a metal belonging to groups 4 to 11 of the periodic table of elements. It can be produced by reacting with a salt, for example a titanium salt, a zirconium salt, a chromium salt, a manganese salt or, in particular, an iron salt. Finally, the compound represented by the formula (A) can also be converted into a complex represented by the formula (A) having a different anion [LQ _m ] ^q− by a conventional method by anion exchange.

In a preferred embodiment, the starting material used is an unconverted π-complex of formula (C), such as ferrocene or bis (η ⁵ -indenyl) iron (II), and the starting material is converted by ligand exchange. It is converted to a complex of formula (B), which is subsequently reacted with a salt of the anion [LQ _m ] ^q- . The complex represented by the formula (B) obtained as an intermediate by this method is not usually isolated.

Examples of suitable salts of the anion [LQ _m ] ^q- are alkali metal salts, alkaline earth metal salts or ammonium salts. Alkali metal salts are preferably used, and sodium salts and potassium salts are particularly preferably used.

Examples of suitable Lewis acids for the above reaction are AlCl ₃ , AlBr ₃ , BF ₃ , SnCl ₄ and TiCl ₄ , preferably AlCl ₃ . It may be convenient to carry out the ligand exchange reaction by adding a reducing agent such as aluminum or magnesium to the reaction mixture, or subsequently adding a reducing agent such as Na ₂ SO ₃ or ascorbic acid to the reaction mixture. Aluminum is a preferred reducing agent. The ligand exchange reaction is conveniently performed in an inert organic solvent. Examples of suitable solvents are aliphatic or alicyclic hydrocarbons such as octane, nonane, decane and cyclohexane. If desired, an excess of π-arene may be used as a solvent.

The reaction of the compound of formula (B) with a salt of the anion [LQ _m ] ^q- and the exchange reaction of the compound of formula (A) are conveniently carried out in an aqueous medium or an aqueous alcoholic medium such as water And in a mixture of methanol or ethanol. Anion [LQ _m] ^q- salts can be prepared in at least a stoichiometric amount, but preferably used in excess.

  In the process according to the invention it is also possible to use metallocene catalysts consisting of two basic components (A-1 and A-2). Of course, component A-1 is a metallocene catalyst. In terms of structure and composition it is basically possible to use any metallocene. The metallocene may be bridged or non-bridged and may have the same or different ligands. The compounds included are compounds of metals belonging to groups 4 to 11 of the periodic table, such as titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum and tungsten, preferably zirconium, hafnium and titanium, especially zirconium. It is a compound of this.

  Such metallocenes are known, and for example, the following documents: JP-A-60-35007, JP-A-63-251405, JP-A-1-51408, JP-A-1-197490, Kaihei 1-275608, JP-A-1-275609, JP-A-1-301704, JP-A-2-41303, JP-A-2-131488, JP-A-2-274703, JP-A-2 -274704, Journal of Organometallic Chemistry (J. Organomet. Chem.), 342 (1988) 21.

  The useful metallocene described is a metallocene represented by the general formula shown in the following [Chemical Formula 1].

〔式中、Ｍ^m+は周期律表の４族〜６族に属する金属のｍ価のカチオン、例えばチタン，ジルコニウム，ハフニウム，バナジウム，ニオブ，タンタル，クロム，モリブデン又はタングステン、好ましくはジルコニウム，ハフニウム及びチタン、とりわけジルコニウムを表わし、（Ｃ₅ Ｈ_5-x Ｒ_x ）は０個ないし５個の置換基Ｒにより置換されたシクロペンタジエニル環を表わし、ｘは０，１，２，３，４又は５を表わし、ｎは０又は２を表わし、各Ｒは互いに独立して、炭素原子数１ないし２０の炭化水素基、１個又はそれより多くのハロゲン原子により置換された炭素原子数１ないし２０の炭化水素基、メタロイド置換された炭素原子数１ないし２０の炭化水素基又はハロゲン原子を表わし；或いは二つの隣接する基Ｒは炭素原子数４ないし２０の環を表わし、又は、ｎが１を表わす場合には、或いは又基Ｂ_y −ＪＲ_z-1-y ′を表わし、ここで、Ｊは配位数３の周期律表の１５族に属する元素を表わし、又は配位数２の周期律表の１６族に属する元素を表わし、好ましくはＮ，Ｐ，Ｏ又はＳを表わし、各Ｒ′は互いに独立して、炭素原子数１ないし２０の炭化水素基、又は１個又はそれより多くのハロゲン原子により置換された炭素原子数１ないし２０の炭化水素基を表わし、ｚは元素Ｊの配位数を表わし、ｙは０又は１を表わし、Ｂは、ｙが１を表わす場合には、周期律表の１４族又は１５族に属する元素を含む架橋基、例えば炭素原子数１ないし２０のアルキレン基、ジ炭素原子数１ないし２０のアルキル基、炭素原子数７ないし２０のアルキルアリール基又はジ炭素原子数６ないし２０のアリールシリコン基又はゲルマニウム基又はアルキル−若しくはアリール−ホスフォン基又はアミン基を表わし、又は、ｎが２を表わす場合には、以下の群：−Ｍ₂ （Ｒ₁₀）（Ｒ₁₁）−，−Ｍ₂ （Ｒ₁₀）（Ｒ₁₁）−Ｍ₂ （Ｒ₁₀）（Ｒ₁₁）−，−Ｃ（Ｒ₁₀）（Ｒ₁₁）−Ｃ（Ｒ₁₀）（Ｒ₁₁）−，−Ｏ−Ｍ₂ （Ｒ₁₀）（Ｒ₁₁）−Ｏ−，−Ｃ（Ｒ₁₀）（Ｒ₁₁）−，−Ｏ−Ｍ₂ （Ｒ₁₀）（Ｒ₁₁）−，−Ｃ（Ｒ₁₀）（Ｒ₁₁）−Ｍ₂ （Ｒ₁₀）（Ｒ₁₁）−，−Ｂ（Ｒ₁₀）−，−Ａｌ（Ｒ₁₀）−，−Ｇｅ−，−Ｓｎ−，−Ｏ−，−Ｓ−，−Ｓ（Ｏ）−，−Ｓ（Ｏ）₂ −，−Ｎ（Ｒ₁₀）−，−Ｃ（Ｏ）−，−Ｐ（Ｒ₁₀）−又は−Ｐ（Ｏ）（Ｒ₁₀）−から選択された基を表わし、ここでＲ₁₀及びＲ₁₁は同一又は異なり、そして水素原子、ハロゲン原子、炭素原子数１ないし１０のアルキル基、炭素原子数１ないし１０のフルオロアルキル基、炭素原子数６ないし１０のアリール基、炭素原子数６ないし１０のフルオロアリール基、炭素原子数１ないし１０のアルコキシ基、炭素原子数２ないし１０のアルケニル基、炭素原子数７ないし４０のアリールアルキル基、炭素原子数８ないし４０のアリールアルケニル基又は炭素原子数７ないし４０のアルキルアリール基を表わし、或いはＲ₁₀及びＲ₁₁は、各々の場合において、それらが結合している原子と一緒になって、環を形成し、そしてＭ₂ は珪素、ゲルマニウム又は錫を表わし、各Ｑは互いに独立して、式（Ｃ₅ Ｈ_5-x Ｒ_x ）で表わされる炭化水素基以外の、水素原子、炭素原子数１ないし５０の炭化水素基、１個又はそれより多くの電子吸引性基、例えばハロゲン原子又はアルコキシ基により置換された炭素原子数１ないし５０の炭化水素基、或いはメタロイド置換された炭素原子数１ないし５０の炭化水素基〔ここで、メタロイドは、周期律表の１４族に属する元素を表わす〕を表わし、或いは二つの基Ｑはアルキリデン基、オレフィン基、アセチレン基又は環状の金属化された炭化水素基を表わし、Ｌは中性のルイス塩基、例えばジエチルエーテル、テトラヒドロフラン、ジメチルアニリン、アニリン、トリメチルホスフィン又はｎ−ブチルアミンを表わし、そしてｗは０ないし３を表わす〕

[Wherein M ^{m +} is an m-valent cation of metals belonging to groups 4 to 6 of the periodic table, such as titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum or tungsten, preferably zirconium, hafnium and Titanium, especially zirconium, (C ₅ H _5-x R _x ) represents a cyclopentadienyl ring substituted with 0 to 5 substituents R, and x represents 0, 1, 2, 3, 4 Or n represents 0 or 2, and each R independently of one another is a hydrocarbon group having 1 to 20 carbon atoms, 1 to 1 carbon atoms substituted by one or more halogen atoms. Represents a hydrocarbon group having 20 carbon atoms, a hydrocarbon group having 1 to 20 carbon atoms substituted with a metalloid or a halogen atom; or two adjacent groups R having 4 to 4 carbon atoms Represents 0 ring, or, when n represents 1, or represents a Matamoto _{B y -JR z-1-y} ', wherein, J is the group 15 of the Periodic Table of coordination number 3 Or an element belonging to group 16 of the periodic table with coordination number 2 and preferably represents N, P, O or S, and each R ′ independently of one another has 1 to 20 carbon atoms. Or a hydrocarbon group having 1 to 20 carbon atoms substituted by one or more halogen atoms, z represents the coordination number of element J, and y represents 0 or 1 , B, when y represents 1, a bridging group containing an element belonging to Group 14 or 15 of the Periodic Table, for example, an alkylene group having 1 to 20 carbon atoms, an alkyl having 1 to 20 dicarbon atoms Groups, alkylaryl groups of 7 to 20 carbon atoms or 6 carbon atoms 20 aryl silicon group or a germanium group, or an alkyl - or aryl - represents a phosphonic group or an amine group, or, when n is 2, the following _{group: -M 2 (R 10) (} R 11) - _{, -M 2 (R 10) (} R 11) -M 2 (R 10) (R 11) -, - C (R 10) (R 11) -C (R 10) (R 11) -, - O- _{M 2 (R 10) (R} 11) -O -, - C (R 10) (R 11) -, - O-M 2 (R 10) (R 11) -, - C (R 10) (R 11 ) -M ₂ (R ₁₀ ) (R ₁₁ )-, -B (R ₁₀ )-, -Al (R ₁₀ )-, -Ge-, -Sn-, -O-, -S-, -S (O )-, -S (O) _2- , -N (R ₁₀ )-, -C (O)-, -P (R ₁₀ )-or -P (O) (R ₁₀ )- expressed, wherein R ₁₀ and R ₁₁ are identical or different and denote hydrogen atom, Rogen atom, alkyl group having 1 to 10 carbon atoms, fluoroalkyl group having 1 to 10 carbon atoms, aryl group having 6 to 10 carbon atoms, fluoroaryl group having 6 to 10 carbon atoms, 1 to 1 carbon atoms Represents an alkoxy group having 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an arylalkyl group having 7 to 40 carbon atoms, an arylalkenyl group having 8 to 40 carbon atoms, or an alkylaryl group having 7 to 40 carbon atoms; Or R ₁₀ and R ₁₁ in each case together with the atoms to which they are attached form a ring, and M ₂ represents silicon, germanium or tin, and each Q independently of the other , formula _{(C 5 H 5-x R} x) other than a hydrocarbon group represented by a hydrogen atom, a hydrocarbon group of 50 1 -C one or than Other electron-withdrawing groups, for example, a hydrocarbon group having 1 to 50 carbon atoms substituted by a halogen atom or an alkoxy group, or a hydrocarbon group having 1 to 50 carbon atoms substituted with a metalloid [where metalloid is Represents an element belonging to group 14 of the periodic table], or two groups Q represent an alkylidene group, an olefin group, an acetylene group or a cyclic metallized hydrocarbon group, L represents a neutral Lewis base, For example, diethyl ether, tetrahydrofuran, dimethylaniline, aniline, trimethylphosphine or n-butylamine, and w represents 0 to 3.

  The term metalloid refers to the elements silicon, germanium, tin and lead, for example.

  In this case, a preferred type of metallocene corresponds to the following structure:

〔式中、ＭはＴｉ又はＺｒ及び上記で定義されたような他の置換基を表わす〕

[Wherein M represents Ti or Zr and other substituents as defined above]

  A more detailed description of the above types of metallocenes can also be found in WO 92/00333.

  For the isomeric specific polymerization of substituted olefins such as propylene, butene and styrene, and their copolymerization, including the case with other olefins, important metallocenes, especially zirconocenes, are indenyl derivatives as ligands. It is what has. These are preferably compounds represented by the following formula (II).

〔式中、Ｍ₁ は周期律表の４族〜６族に属する金属を表わし、Ｒ₁ 及びＲ₂ は同一又は異なり、そして水素原子、炭素原子数１ないし１０のアルキル基、炭素原子数１ないし１０のアルコキシ基、炭素原子数６ないし１０のアリール基、炭素原子数６ないし１０のアリールオキシ基、炭素原子数２ないし１０のアルケニル基、炭素原子数７ないし４０のアリールアルキル基、炭素原子数７ないし４０のアルキルアリール基、炭素原子数８ないし４０のアリールアルケニル基又はＯＨ基又はハロゲン原子を表わし、そして基Ｒ₃ は同一又は異なり、そして水素原子、ハロゲン原子、ハロゲン化されていてよい炭素原子数１ないし１０のアルキル基、炭素原子数６ないし１０のアリール基、或いは以下の基：−ＮＲ₂ ，−ＳＲ，−ＯＳｉＲ₃ ，−ＳｉＲ₃ 又は−ＰＲ₂ （式中、Ｒはハロゲン原子、炭素原子数１ないし１０のアルキル基又は炭素原子数６ないし１０のアリール基を表わす）を表わし、Ｒ₄ ないしＲ₈ はＲ₃ のために定義された意味と同じ意味を表わし、又は隣接する基Ｒ₄ ないしＲ₈ は、それらが結合している原子と一緒になって、芳香族環又は脂肪族環を形成し、Ｒ₉ は以下の群：−Ｍ₂ （Ｒ₁₀）（Ｒ₁₁）−，−Ｍ₂ （Ｒ₁₀）（Ｒ₁₁）−Ｍ₂（Ｒ₁₀）（Ｒ₁₁）−，−Ｃ（Ｒ₁₀）（Ｒ₁₁）−Ｃ（Ｒ₁₀）（Ｒ₁₁）−，−Ｏ−Ｍ₂ （Ｒ₁₀）（Ｒ₁₁）−Ｏ−，−Ｃ（Ｒ₁₀）（Ｒ₁₁）−，−Ｏ−Ｍ₂ （Ｒ₁₀）（Ｒ₁₁）−，−Ｃ（Ｒ₁₀）（Ｒ₁₁）−Ｍ₂ （Ｒ₁₀）（Ｒ₁₁）−，−Ｂ（Ｒ₁₀）−，−Ａｌ（Ｒ₁₀）−，−Ｇｅ−，−Ｓｎ−，−Ｏ−，−Ｓ−，−Ｓ（Ｏ）−，−Ｓ（Ｏ）₂ −，−Ｎ（Ｒ₁₀）−，−Ｃ（Ｏ）−，−Ｐ（Ｒ₁₀）−又は−Ｐ（Ｏ）（Ｒ₁₀）−から選択された基を表わし、ここでＲ₁₀及びＲ₁₁は同一又は異なり、そして水素原子、ハロゲン原子、炭素原子数１ないし１０のアルキル基、炭素原子数１ないし１０のフルオロアルキル基、炭素原子数６ないし１０のアリール基、炭素原子数６ないし１０のフルオロアリール基、炭素原子数１ないし１０のアルコキシ基、炭素原子数２ないし１０のアルケニル基、炭素原子数７ないし４０のアリールアルキル基、炭素原子数８ないし４０のアリールアルケニル基又は炭素原子数７ないし４０のアルキルアリール基を表わし、或いはＲ₁₀及びＲ₁₁は、各々の場合において、それらが結合している原子と一緒になって、環を形成し、そしてＭ₂ は珪素、ゲルマニウム又は錫を表わす〕

[Wherein M ₁ represents a metal belonging to groups 4 to 6 of the periodic table, R ₁ and R ₂ are the same or different, and are a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or 1 carbon atom. An alkoxy group having 10 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, an aryloxy group having 6 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an arylalkyl group having 7 to 40 carbon atoms, a carbon atom Represents an alkylaryl group having 7 to 40 carbon atoms, an arylalkenyl group having 8 to 40 carbon atoms or an OH group or a halogen atom, and the groups R ₃ are the same or different and may be a hydrogen atom, a halogen atom or a halogenated group. alkyl group having 1 to 10 carbon atoms, an aryl group of 6 to 10 carbon atoms, or the following _{groups: -NR 2, -SR, -OSiR 3} , -S R ₃ or -PR ₂ (wherein, R represents a halogen atom, an aryl group an alkyl group or a C 6 -C 10 having 1 to 10 carbon atoms) represents, to no R ₄ for R ₈ is R ₃ Or the adjacent groups R ₄ to R ₈ together with the atoms to which they are attached form an aromatic or aliphatic ring, R ₉ is _{group: -M 2 (R 10) (} R 11) -, - M 2 (R 10) (R 11) -M 2 (R 10) (R 11) -, - C (R 10) (R 11) _{-C (R 10) (R 11} ) -, - O-M 2 (R 10) (R 11) -O -, - C (R 10) (R 11) -, - O-M 2 (R 10) _{(R 11) -, - C} (R 10) (R 11) -M 2 (R 10) (R 11) -, - B (R 10) -, - Al (R 10) -, - Ge -, - Sn-, -O-, -S-, -S (O)-, -S ( O) ₂ —, —N (R ₁₀ ) —, —C (O) —, —P (R ₁₀ ) — or —P (O) (R ₁₀ ) —, wherein R ₁₀ And R ₁₁ are the same or different and are a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms, a fluoroalkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, or 6 carbon atoms. A fluoroaryl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an arylalkyl group having 7 to 40 carbon atoms, an arylalkenyl group having 8 to 40 carbon atoms, or carbon C 7 atoms to an alkyl aryl group of 40 or R ₁₀ and R _11, in each case, together with the atoms to which they are attached, form a ring, and M ₂ is silicon, gate Represent Maniumu or tin]

  The 4,5,6,7-tetrahydroindenyl homologue corresponding to the compound of formula (II) is also important.

Preferably, in formula (II), M ₁ represents zirconium, R ₁ and R ₂ are identical, and represents a methyl group or a chlorine atom, especially a chlorine atom, and R ₃ to R ₈ represent a hydrogen atom or a carbon atom. Represents an alkyl group of formulas 1 to 4, wherein R ₉ represents —Si (R ₁₀ ) (R ₁₁ ) — group, —C (R ₁₀ ) (R ₁₁ ) — group, —C (R ₁₀ ) (R ₁₁ ) — C (R ₁₀ ) (R ₁₁ ) — represents a group, and R ₁₀ and R ₁₁ are the same or different and each represents an alkyl group having 1 to 4 carbon atoms or an aryl group having 1 to 10 carbon atoms. In particular, R ₁₀ and R ₁₁ are the same or different and represent a methyl group or a phenyl group.

  The indenyl ligand and / or tetrahydroindenyl ligand in the formula (II) is preferably 2-, 2,4-, 4,7-, 2,6-, 2,4,6-, 2, The 4,5,6- or 2,4,5,6,7-position is substituted, in particular the 2,4,6-position. The substituent is preferably an alkyl group having 1 to 4 carbon atoms, such as a methyl group, an ethyl group or an isopropyl group.

In the formula, a compound represented by the formula (II) in which the substituents at the 4-position and 5-position (R ₅ and R ₆ ) of the indenyl group together with the atoms to which they are bonded form a benzene ring Of particular importance. This fused ring system may likewise be substituted by a group having the definition of R ₃ -R ₈ .

  The metallocene represented by the formula (II) is particularly suitable for the production of high molecular weight polyolefins having high stereoregularity.

  Of particular importance are also compounds of the formula (II) having a (substituted) phenyl or naphthyl group substituted in the 4-position.

  For the isomeric specific polymerization of substituted olefins such as propylene, butene and styrene, and their copolymerization, including those with other olefins, the important metallocenes are compounds represented by the following formula (III) It is.

〔式中、Ｍ₁ は周期律表の４族〜６族に属する金属を表わし、Ｒ₁ 及びＲ₂ は同一又は異なり、そして水素原子、炭素原子数１ないし１０のアルキル基、炭素原子数１ないし１０のアルコキシ基、炭素原子数６ないし１０のアリール基、炭素原子数６ないし１０のアリールオキシ基、炭素原子数２ないし１０のアルケニル基、炭素原子数７ないし４０のアリールアルキル基、炭素原子数７ないし４０のアルキルアリール基、炭素原子数８ないし４０のアリールアルケニル基又はＯＨ基又はハロゲン原子を表わし、そして基Ｒ₃ は同一又は異なり、そして水素原子、ハロゲン原子、ハロゲン化されていてよい炭素原子数１ないし１０のアルキル基、炭素原子数６ないし１０のアリール基、或いは以下の基：−ＮＲ₂ ，−ＳＲ，−ＯＳｉＲ₃ ，−ＳｉＲ₃ 又は−ＰＲ₂ （式中、Ｒはハロゲン原子、炭素原子数１ないし１０のアルキル基又は炭素原子数６ないし１０のアリール基を表わす）を表わし、Ｒ₄ ないしＲ₈ はＲ₃ のために定義された意味と同じ意味を表わし、又は隣接する基Ｒ₄ ないしＲ₈ は、それらが結合している原子と一緒になって、芳香族環又は脂肪族環を形成し、Ｒ₉ は以下の群：−Ｍ₂ （Ｒ₁₀）（Ｒ₁₁）−，−Ｍ₂ （Ｒ₁₀）（Ｒ₁₁）−Ｍ₂（Ｒ₁₀）（Ｒ₁₁）−，−Ｃ（Ｒ₁₀）（Ｒ₁₁）−Ｃ（Ｒ₁₀）（Ｒ₁₁）−，−Ｏ−Ｍ₂ （Ｒ₁₀）（Ｒ₁₁）−Ｏ−，−Ｃ（Ｒ₁₀）（Ｒ₁₁）−，−Ｏ−Ｍ₂ （Ｒ₁₀）（Ｒ₁₁）−，−Ｃ（Ｒ₁₀）（Ｒ₁₁）−Ｍ₂ （Ｒ₁₀）（Ｒ₁₁）−，−Ｂ（Ｒ₁₀）−，−Ａｌ（Ｒ₁₀）−，−Ｇｅ−，−Ｓｎ−，−Ｏ−，−Ｓ−，−Ｓ（Ｏ）−，−Ｓ（Ｏ）₂ −，−Ｎ（Ｒ₁₀）−，−Ｃ（Ｏ）−，−Ｐ（Ｒ₁₀）−又は−Ｐ（Ｏ）（Ｒ₁₀）−から選択された基を表わし、ここでＲ₁₀及びＲ₁₁は同一又は異なり、そして水素原子、ハロゲン原子、炭素原子数１ないし１０のアルキル基、炭素原子数１ないし１０のフルオロアルキル基、炭素原子数６ないし１０のアリール基、炭素原子数６ないし１０のフルオロアリール基、炭素原子数１ないし１０のアルコキシ基、炭素原子数２ないし１０のアルケニル基、炭素原子数７ないし４０のアリールアルキル基、炭素原子数８ないし４０のアリールアルケニル基又は炭素原子数７ないし４０のアルキルアリール基を表わし、或いはＲ₁₀及びＲ₁₁は、各々の場合において、それらが結合している原子と一緒になって、環を形成し、そしてＭ₂ は珪素、ゲルマニウム又は錫を表わし、そしてＲ₁₂ないしＲ₁₇はＲ₃ のために定義された意味と同じ意味を表わす〕

[Wherein M ₁ represents a metal belonging to groups 4 to 6 of the periodic table, R ₁ and R ₂ are the same or different, and are a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or 1 carbon atom. An alkoxy group having 10 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, an aryloxy group having 6 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an arylalkyl group having 7 to 40 carbon atoms, a carbon atom Represents an alkylaryl group having 7 to 40 carbon atoms, an arylalkenyl group having 8 to 40 carbon atoms or an OH group or a halogen atom, and the groups R ₃ are the same or different and may be a hydrogen atom, a halogen atom or a halogenated group. alkyl group having 1 to 10 carbon atoms, an aryl group of 6 to 10 carbon atoms, or the following _{groups: -NR 2, -SR, -OSiR 3} , -S R ₃ or -PR ₂ (wherein, R represents a halogen atom, an aryl group an alkyl group or a C 6 -C 10 having 1 to 10 carbon atoms) represents, to no R ₄ for R ₈ is R ₃ Or the adjacent groups R ₄ to R ₈ together with the atoms to which they are attached form an aromatic or aliphatic ring, R ₉ is _{group: -M 2 (R 10) (} R 11) -, - M 2 (R 10) (R 11) -M 2 (R 10) (R 11) -, - C (R 10) (R 11) _{-C (R 10) (R 11} ) -, - O-M 2 (R 10) (R 11) -O -, - C (R 10) (R 11) -, - O-M 2 (R 10) _{(R 11) -, - C} (R 10) (R 11) -M 2 (R 10) (R 11) -, - B (R 10) -, - Al (R 10) -, - Ge -, - Sn-, -O-, -S-, -S (O)-, -S ( O) ₂ —, —N (R ₁₀ ) —, —C (O) —, —P (R ₁₀ ) — or —P (O) (R ₁₀ ) —, wherein R ₁₀ And R ₁₁ are the same or different and are a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms, a fluoroalkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, or 6 carbon atoms. A fluoroaryl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an arylalkyl group having 7 to 40 carbon atoms, an arylalkenyl group having 8 to 40 carbon atoms, or carbon C 7 atoms to an alkyl aryl group of 40 or R ₁₀ and R _11, in each case, together with the atoms to which they are attached, form a ring, and M ₂ is silicon, gate It represents Maniumu or tin, and to R ₁₂ not R ₁₇ represents the same meaning as defined for R _3]

  Examples of metallocenes that can be used according to the invention are the following compounds: biscyclopentadienylzirconium dichloride, biscyclopentadienylzirconium dimethyl, biscyclopentadienylzirconium diphenyl, biscyclopentadienylzirconium. Dibenzyl, biscyclopentadienylzirconium bistrimethylsilyl, bis (methylcyclopentadienyl) zirconium dichloride, bis (1,2-dimethylcyclopentadienyl) zirconium dichloride, bis (1,3-dimethylcyclopentadienyl) Zirconium dichloride, bis (1,2,4-trimethylcyclopentadienyl) zirconium dichloride, bis (1,2,3-trimethylcyclopentadienyl) zirconium dichloride, bis Pentamethylcyclopentadienyl) zirconium dichloride, bisindenylzirconium dichloride, bis (tetrahydroindenyl) zirconium dichloride, dimethylsilylbis-1-tetrahydroindenylzirconium dichloride, dimethylsilylbis-1- (2-methyltetrahydroindenyl) ) Zirconium dichloride, dimethylsilylbis-1- (2,3,5-trimethylcyclopentadienyl) zirconium dichloride, dimethylsilylbis-1- (2,4-dimethylcyclopentadienyl) zirconium dichloride, dimethylsilylbis- 1-indenylzirconium dichloride, dimethylsilylbis-1-indenylzirconium dimethyl, dimethylgermylbis-1-indenylzirconium dichloride, dimethyl Rusilylbis-1- (2-methylindenyl) zirconium dichloride, dimethylsilylbis-1- (2-methyl-4-isopropylindenyl) zirconium dichloride, phenylmethylsilylbis-1- (2-methylindenyl) zirconium dichloride Dimethylsilylbis-1- (2-methyl-4-ethylindenyl) zirconium dichloride, ethylenebis-1- (4,7-dimethylindenyl) zirconium dichloride, phenyl (methyl) silylbis-1-indenylzirconium dichloride , Phenyl (vinyl) silylbis-1-indenylzirconium dichloride, diphenylsilylbis-1-indenylzirconium dichloride, dimethylsilylbis (1- (2-methyl-4-tert-butylindenyl)) zirconium di Chloride, methylphenylsilylbis (1- (2-methyl-4-isopropylindenyl)) zirconium dichloride, dimethylsilylbis (1- (2-ethyl-4-methylindenyl)) zirconium dichloride, dimethylsilylbis (1 -(2,4-dimethylindenyl)) zirconium dichloride, dimethylsilylbis (1- (2-methyl-4-ethylindenyl)) zirconium dichloride, dimethylsilylbis (2-methyl-4,6-diisopropylindenyl) ) Zirconium dichloride, dimethylsilylbis (2,4,6-trimethylindenyl) zirconium dichloride, methylphenylsilylbis (2-methyl-4,6-diisopropylindenyl) zirconium dichloride, 1,2-ethanediylbis (2-methyl) -4 -Diisopropylindenyl) zirconium dichloride, dimethylsilyl (9-fluorenyl) (cyclopentadienyl) zirconium dichloride, diphenylsilyl (9-fluorenyl) (cyclopentadienyl) zirconium dichloride, diphenylmethylene (9-fluorenyl) (cyclopenta) Dienyl) zirconium dichloride, isopropylidene (9-fluorenyl) (cyclopentadienyl) zirconium dichloride, phenylmethylmethylene (9-fluorenyl) (cyclopentadienyl) zirconium dichloride, isopropylidene (9-fluorenyl) (1- ( 3-Isopropyl) cyclopentadienyl) zirconium dichloride, isopropylidene (9-fluorenyl) (1- (3-methyl) cyclopentadienyl) Luconium dichloride, diphenylmethylene (9-fluorenyl) (1- (3-methyl) cyclopentadienyl) zirconium dichloride, methylphenylmethylene (9-fluorenyl) (1- (3-methyl) cyclopentadienyl) zirconium dichloride , Dimethylsilyl (9-fluorenyl)-(1- (3-methyl) cyclopentadienyl) zirconium dichloride, diphenylsilyl (9-fluorenyl)-(1- (3-methyl) cyclopentadienyl) zirconium dichloride, diphenyl Methylene (9-fluorenyl)-(1- (3-tert-butyl) cyclopentadienyl) zirconium dichloride and isopropylidene (9-fluorenyl)-(1- (3-tert-butyl) cyclopentadienyl) zirconium Dichloride.

  In producing the catalyst, it is preferable to use a chiral metallocene as a racemate. However, it is also possible to use pure R and S forms. Using these pure stereoisomeric forms, active polymers can be made if desired. However, due to mirror symmetry with respect to the central metal, the polymerization-active center (metal atom) of the compound is no longer chiral and therefore it is impossible to produce higher order tactic polymers As such, the meso form of the metallocene should be separated. If the meso form is not separated, an atactic polymer is produced in addition to the isotactic or syndiotactic polymer. This is desirable overall for certain applications, for example for soft moldings or for polyethylene grades. Stereoisomers are separated by methods described in the literature.

Examples of suitable compounds as component A-2 are the following compounds:
a) Aluminoxane The aluminoxane used is preferably a compound represented by the following formula (IV) as a linear type and / or a compound represented by the following formula (V) as a cyclic type: In formulas (IV) and (V), the radicals R are identical or different and represent an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 18 carbon atoms, a benzyl group or a hydrogen atom, and p is It represents an integer of 2 to 50, preferably an integer of 10 to 35.

  The radicals R are preferably identical or different and represent a methyl, isopropyl, n-butyl, isobutyl, phenyl or benzyl group, particularly preferably a methyl group.

  If the radicals R are different, they are preferably methyl and hydrogen atoms, methyl and isobutyl groups, or methyl and n-butyl groups, the content of hydrogen atoms, isobutyl groups or n-butyl groups being Preferably, it is 0.01-40% (number of groups R).

Aluminoxane can be produced by various methods by known methods. One method is the reaction of aluminum hydrocarbon compounds and / or hydride aluminum hydrocarbon compounds with water in an inert solvent (eg toluene) (in gaseous, solid or liquid form, or else, for example in crystallization). In combined form as water). In order to produce aluminoxanes with different alkyl groups R, two different aluminum trialkyls (AlR ₃ + AlR ₃ ′) are reacted with water, depending on the desired composition and reactivity [S. Pasynkiewicz, Polyhedron 9 (1990) 429 and JP-A-1-275609].

  The exact structure of the aluminoxane represented by the formulas (IV) and (V) is not known.

  In connection with their production process, the aluminoxane solutions combine various content characteristics of the unreacted aluminum starting compound, which exists in free form or as an adduct.

b) Ion Exchange Compounds Ion exchange compounds are cations (which react reversibly with the ligands of component A-1) and non-coordinating anions (which are bulky, unstable and chemically Inactive). When component A-1 and component A-2 are mixed, an ion pair formed from the cation of A-2 and the ligand of A-1 is produced. Examples of component A-2 cations are Bronsted acids (eg, ammonium ions) or reducing Lewis acids (eg, Ag ⁺ or ferrocene ions).

  The aluminoxane that can be used as component A-2 may be produced in the course of producing a supported catalyst from triethylaluminum.

  In addition to homogeneous catalyst systems, metallocenes may be used as heterogeneous catalysts. In this case, the catalyst is supported on an inorganic or organic support by methods known from the literature to those skilled in the art. Inorganic carrier materials are preferably silica gel and clay minerals; further details on this can be found, for example, in JP 7-508065.

  Examples of organic carrier materials are commercially available microporous polymeric carriers [e.g. Accurel grades from AKZO, e.g. Acurel-PE, Acurel-PP, Acurele-PA. -Acure-PA-12 with a void content of -6 or about 75% by volume. The pore size of the Accurel material is 0.5-5 μm (PP), 1.0-5 μm (HDPE), or 0.5-3 μm (PA-6 and PA-12).

  The microporous polymeric carrier is conveniently dried prior to handling, then washed, and then provided under protective gas, for example by treatment with an aluminum alkyl solution.

  A preferred approach for this is to first react the aluminoxane with at least one metallocene by vigorous mixing (eg, by stirring) in a suitable solvent (eg, pentane, hexane, heptane, toluene or dichloromethane). . The reaction temperature is preferably -20 ° C to + 120 ° C, in particular 15-40 ° C. The molar ratio of aluminum to metallocene transition metal M is preferably between 10: 1 and 10000: 1. The reaction time is usually between 5 and 120 minutes, preferably 10-30 minutes. The reaction is preferably carried out at an aluminum concentration greater than 0.01 mol / liter, in particular at an aluminum concentration greater than 0.5 mol / liter. The reaction is carried out under inert conditions.

  For the reaction with the metallocene, it is also possible to use a mixture of aluminoxane and another aluminum alkyl compound, for example trimethyl-, triethyl- or triisobutylaluminum, instead of aluminoxane.

  After the reaction has taken place, the solvent can be removed, for example under vacuum, or the solvent can be replaced with a different solvent for the next operation. The solution thus prepared is reacted with the microporous polymeric carrier in a suitable manner. In this case, the support is added in such an amount that at least its total pore volume can be immersed in the solution derived from the previous reaction. The reaction described in the second sentence of this paragraph is preferably carried out by vigorous mixing at a temperature between −20 ° C. and + 20 ° C., in particular at 15-40 ° C., for example by stirring or treatment with ultrasound. Done. Complete homogenization takes place. In this case, the replacement with the inert gas having a pore volume is promoted, for example, by applying a vacuum for a short time. Basically, supported catalysts can also be prepared in a one-pot reaction (ie, all three starting components are simultaneously reacted with each other in a suitable solvent / suspension medium). In this case, the amount of polymeric carrier should preferably be calculated so that the polymeric carrier can be immersed in the entire volume of the liquid.

  The catalyst is obtained in the form of a suspension in an inert suspension medium such as heptane, n-decane, hexane, mineral oil or diesel oil, or else after removal of the remaining solvent, for example by a drying process carried out under vacuum. Can be metered into the polymerization system in dry form.

  The catalyst can conveniently be polymerized in the gas phase, in a liquid monomer, or in suspension (in which case the addition of another organoaluminum compound can be omitted).

  The polymerization using the catalyst can be performed in a liquid or gas phase by a known method. The liquid phase can be, for example, an aliphatic hydrocarbon or the liquid monomer itself. The metallocene catalyst can also be used as a mixture with other types of catalysts, such as Ziegler or Phillips catalysts. At the end of the polymerization, the catalyst is decomposed, for example by adding water (steam), wet nitrogen, carbon dioxide or alcohol.

  The transition metal metallocene catalyst described in JP-A-7-228621 is the following compound. The metallocene-based transition metal compound is composed of one or two cyclopentadienyl ligands that may be substituted, that is, one to two cyclopentas that may be bonded to form a condensed ring. An organometallic compound composed of a dienyl ring-containing ligand and a transition metal of Group 3, 4, 5, or 6 of the long periodic table, or a cationic complex thereof.

  Preferable examples of such metallocene transition metal compounds are compounds represented by the following general formula [VI] or [VII].

[Chemical formula 7]
(CpR1aH5-a) p (CpR2bH5-b) qMR3r [VI]
[(CpR1aH5-a) p (CpR2bH5-b) qMR3rLm] n + [R4] [VII]
(Here, CpR1aH5-a and CpR2bH5-b represent derivatives of the cyclopentadienyl (Cp) group.)

  [VI], [VII] wherein R 1 and R 2 are each an optionally substituted hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing substituent, a phosphorus-containing substituent, a nitrogen-containing substituent, and an oxygen-containing substituent. Each may be the same or different. Specifically, methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, t-butyl group, pentyl group, isopentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, etc. Alkyl group, phenyl group, p-tolyl group, o-tolyl group, m-tolyl group and other aryl groups, fluoromethyl group, fluoroethyl group, fluorophenyl group, chloromethyl group, chloroethyl group, chlorophenyl group, bromomethyl group Halo-substituted hydrocarbon groups such as bromoethyl group, bromophenyl group, iodomethyl group, iodoethyl group, iodophenyl group, silicon-containing substituents such as trimethylsilyl group, triethylsilyl group, triphenylsilyl group, methoxy group, ethoxy group, propoxy Group, isopropoxy group, butoxy group, isobutoxy group, t-but An alkoxy group such as shea group, phenoxy, methylphenoxy group, penta-methylphenoxy group, p- tolyloxy group, m- tolyloxy group, an aryloxy group such as o- tolyloxy group. Of these, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, t-butyl, trimethylsilyl, methoxy, phenoxy and the like are preferred.

  In the formulas [VI] and [VII], R1 and R2 may be bonded to each other to form a crosslinking group. Specifically, an alkylene group such as a methylene group, an ethylene group, an ethylidene group, a propylidene group, an isopropylidene group, a phenylmethylidene group, an alkylidene group such as a diphenylmethylidene group, a dimethylsilylene group, a diethylsilylene group, Silicon-containing cross-linking groups such as propylsilylene group, diisopropylsilylene group, diphenylsilylene group, methylethylsilylene group, methylphenylsilylene group, methylisopropylsilylene group, methyl-t-butylsilylene group, dimethylgermylene group, diethylgermylene Group, dipropylgermylene group, diisopropylgermylene group, diphenylgermylene group, methylethylgermylene group, methylphenylgermylene group, methylisopropylgermylene group, methyl-t-butylgermylene group Sulfonium-containing crosslinking group such as an amino group etc., phosphinyl group, and the like.

  Furthermore, in the formulas [VI] and [VII], R1 or R2 may be bonded to each other to form a ring. Specifically, an indenyl group, a tetrahydroindenyl group, a fluorenyl group, an octahydrofluorenyl group and the like are preferable, and these may be substituted. R3 is a hydrocarbon group having 1 to 20 carbon atoms, hydrogen, halogen, silicon-containing substituent, alkoxy group, aryloxy group, amide group, or thioalkoxy group, S (O) sR5, OR5, NR5t , SiR5, P (O) uR53, s is 0, 1, 2 or 3, t is 0, 1, 2 or 3, u is 0, 1, 2 or 3, and R5 is the same Alternatively, they may be different hydrogen, halogen, silicon-containing group, or a hydrocarbon group having 1 to 20 carbon atoms which may have a halogen substituent.

  Specifically, methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, t-butyl group, pentyl group, isopentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group Alkyl groups such as phenyl group, phenyl group, p-tolyl group, o-tolyl group, m-tolyl group, etc., fluoromethyl group, fluoroethyl group, fluorophenyl group, chloromethyl group, chloroethyl group, chlorophenyl group, bromomethyl Groups, bromoethyl groups, bromophenyl groups, iodomethyl groups, iodoethyl groups, iodophenyl groups and other halo-substituted hydrocarbon groups, fluorine, chlorine, bromine, iodine and other halogens, trimethylsilyl groups, triethylsilyl groups, triphenylsilyl groups, etc. Silicon-containing substituents, methoxy group, ethoxy group, propoxy group, isopropoxy Group, butoxy group, isobutoxy group, alkoxy group such as t-butoxy group, aryloxy group such as phenoxy, methylphenoxy, pentamethylphenoxy group, p-tolyloxy group, m-tolyloxy group, o-tolyloxy group, dimethylamide group Amide group such as diethylamide group, dipropylamide group, diisopropylamide group, ethyl-t-butylamide group, bis (trimethylsilyl) amide group, methylthioalkoxy group, ethylthioalkoxy group, propylthioalkoxy group, butylthioalkoxy group, t -Thioalkoxy groups such as butylthioalkoxy group and phenylthioalkoxy group. Of these, hydrogen, methyl group, ethyl group, propyl group, isopropyl group, butyl group, phenyl group, halogen such as chlorine, methoxy group, ethoxy group, propoxy group, isopropoxy group, dimethylamide group, methylthioalkoxy group Among them, hydrogen, methyl group, and chlorine are particularly preferable.

  R3 may be bonded to R1, R2 or Cp. Specific examples of such a ligand include CpH4 (CH2) nO- (1≤n≤5), CpMe4 (CH2) nO- (1 ≤ n ≤ 5), CpH4 (Me2Si) (t-Bu) N-, CpMe4 (Me2Si) (t-Bu) N-, etc. (Cp represents a cyclopentadienyl group, Me represents methyl, and Bu represents a butyl group) Can be given.

  Further, R3 may be bonded to each other to form a bidentate ligand. Specific examples of such R3 include -OCH2O-, -OCH2CH2O-, -O (o-C6H4) O- and the like. M is an atom of Periodic Table Group 3, 4, 5, 6; specifically, scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, Examples include thulium, ytterbium, lutetium, actinium, thorium, protoactinium, uranium, titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, and tungsten. Of these, Group 4 titanium, zirconium, and hafnium are preferably used. These may be used in combination.

  L represents an electrically neutral ligand, specifically, ethers such as diethyl ether, tetrahydrofuran and dioxane, nitriles such as acetonitrile, amides such as dimethylformamide, and trimethylphosphine. Examples include phosphines and amines such as trimethylamine. Tetrahydrofuran, trimethylphosphine and trimethylamine are preferred.

  [R4] is one or more anions that neutralize the cation. Specifically, tetraphenylborate, tetra (p-tolyl) borate, carbadodecaborate, dicarboundecaborate, tetrakis (pentafluoro) Phenyl) borate, tetrafluoroborate, hexafluorophosphate and the like. Preferred are tetraphenylborate, tetra (p-tolyl) borate, tetrafluoroborate, and hexafluorophosphate. a and b are integers of 0 to 5, preferably 0, 1, and 5. P, q, and r are non-negative integers satisfying p + q + r = V when the metallocene transition metal compound is represented by formula [VI] when the valence of M is V, and the metallocene transition metal compound Is a non-negative integer satisfying p + q + r = V−n. Usually, p and q are integers of 0 to 3, preferably 0 or 1. r is an integer of 0 to 3, preferably 1 or 2.

The catalyst described above can produce any of an isotactic polymer, a syndiotactic polymer, and an atactic polymer. Specific examples of the metallocene transition metal compound described above include the following compounds and the like corresponding to the formula [VI] taking zirconium as an example.
Bis (methylcyclopentadienyl) zirconium dichloride, bis (ethylcyclopentadienyl) zirconium dichloride, bis (methylcyclopentadienyl) zirconium dimethyl, bis (ethylcyclopentadienyl) zirconium dimethyl, bis (methylcyclopentadi) Enyl) zirconium dihydride, bis (ethylcyclopentadienyl) zirconium dihydride, bis (dimethylcyclopentadienyl) zirconium dichloride, bis (trimethylcyclopentadienyl) zirconium dichloride, bis (tetramethylcyclopentadienyl) ) Zirconium dichloride, bis (ethyltetramethylcyclopentadienyl) zirconium dichloride, bis (indenyl) zirconium dichloride, bis (dimethyl) Lucyclopentadienyl) zirconium dimethyl, bis (trimethylcyclopentadienyl) zirconium dimethyl, bis (tetramethylcyclopentadienyl) zirconium dimethyl, bis (ethyltetramethylcyclopentadienyl) zirconium dimethyl, bis (indenyl) zirconium Dimethyl, bis (dimethylcyclopentadienyl) zirconium dihydride, bis (trimethylcyclopentadienyl) zirconium dihydride, bis (ethyltetramethylcyclopentadienyl) zirconium dihydride, bis (trimethylsilylcyclopentadienyl) ) Zirconium dimethyl, bis (trimethylsilylcyclopentadienyl) zirconium dihydride, bis (trifluoromethylcyclopentadienyl) zirconium dichloride Chloride, bis (trifluoromethyl cyclopentadienyl) zirconium dimethyl, bis (trifluoromethyl cyclopentadienyl) zirconium dihydride, isopropylidene - bis (indenyl) zirconium dichloride

  Isopropylidene-bis (indenyl) zirconium dimethyl, isopropylidene-bis (indenyl) zirconium dihydride, pentamethylcyclopentadienyl (cyclopentadienyl) zirconium dichloride, pentamethylcyclopentadienyl (cyclopentadienyl) zirconium Dimethyl, pentamethylcyclopentadienyl (cyclopentadienyl) zirconium dihydride, ethyltetramethylcyclopentadienyl (cyclopentadienyl) zirconium dihydride, isopropylidene (cyclopentadienyl) (fluorenyl) zirconium dichloride , Isopropylidene (cyclopentadienyl) (fluorenyl) zirconium dimethyl, dimethylsilyl (cyclopentadienyl) (fluorenyl) zirconi Mujimechiru, isopropylidene (cyclopentadienyl) (fluorenyl) zirconium dihydride, bis (cyclopentadienyl) zirconium dichloride, bis (cyclopentadienyl) zirconium dimethyl

  Bis (cyclopentadienyl) zirconium diethyl, bis (cyclopentadienyl) zirconium dipropyl, bis (cyclopentadienyl) zirconium diphenyl, methylcyclopentadienyl (cyclopentadienyl) zirconium dichloride, ethylcyclopentadienyl (Cyclopentadienyl) zirconium dichloride, methylcyclopentadienyl (cyclopentadienyl) zirconium dimethyl, ethylcyclopentadienyl (cyclopentadienyl) zirconium dimethyl, methylcyclopentadienyl (cyclopentadienyl) zirconium Hydride, ethylcyclopentadienyl (cyclopentadienyl) zirconium dihydride, dimethylcyclopentadienyl (cyclopentadienyl) zirconium dichloride , Trimethylcyclopentadienyl (cyclopentadienyl) zirconium dichloride, tetramethylcyclopentadienyl (cyclopentadienyl) zirconium dichloride, bis (pentamethylcyclopentadienyl) zirconium dichloride, tetramethylcyclopentadienyl ( Cyclopentadienyl) zirconium dichloride, indenyl (cyclopentadienyl) zirconium dichloride, dimethylcyclopentadienyl (cyclopentadienyl) zirconium dimethyl, trimethylcyclopentadienyl (cyclopentadienyl) zirconium dimethyl, tetramethylcyclopenta Dienyl (cyclopentadienyl) zirconium dimethyl, bis (pentamethylcyclopentadienyl) zirconium dimethyl , Ethyltetramethylcyclopentadienyl (cyclopentadienyl) zirconium dimethyl, indenyl (cyclopentadienyl) zirconium dimethyl, dimethylcyclopentadienyl (cyclopentadienyl) zirconium dihydride, trimethylcyclopentadienyl (cyclo Pentadienyl) zirconium dihydride, bis (pentamethylcyclopentadienyl) zirconium dihydride, indenyl (cyclopentadienyl) zirconium dihydride

  Trimethylsilylcyclopentadienyl (cyclopentadienyl) zirconium dimethyl, trimethylsilylcyclopentadienyl (cyclopentadienyl) zirconium dihydride, trifluoromethylcyclopentadienyl (cyclopentadienyl) zirconium dichloride, trifluoromethylcyclo Pentadienyl (cyclopentadienyl) zirconium dimethyl, trifluoromethylcyclopentadienyl (cyclopentadienyl) zirconium dihydride, bis (cyclopentadienyl) (trimethylsilyl) (methyl) zirconium, bis (cyclopentadi) Enyl) (triphenylsilyl) (methyl) zirconium, bis (cyclopentadienyl) [tris (trimethylsilyl) silyl] (methyl) zirconium, bis (si Ropentajieniru) [bis (methylsilyl) silyl] (methyl) zirconium, bis (cyclopentadienyl) (trimethylsilyl) (trimethylsilylmethyl) zirconium

  Bis (cyclopentadienyl) (trimethylsilyl) (benzyl) zirconium, methylene-bis (cyclopentadienyl) zirconium dichloride, ethylene-bis (cyclopentadienyl) zirconium dichloride, isopropylidene-bis (cyclopentadienyl) zirconium Dichloride, dimethylsilyl-bis (cyclopentadienyl) zirconium dichloride, methylene-bis (cyclopentadienyl) zirconium dimethyl, ethylene-bis (cyclopentadienyl) zirconium dimethyl, isopropylidene-bis (cyclopentadienyl) zirconium Dimethyl, dimethylsilyl-bis (cyclopentadienyl) zirconium dimethyl, methylene-bis (cyclopentadienyl) zirconium dihydride

  Ethylene-bis (cyclopentadienyl) zirconium dihydride, isopropylidene-bis (cyclopentadienyl) zirconium dihydride, dimethylsilyl-bis (cyclopentadienyl) zirconium dihydride, bis (cyclopentadienyl) ) Zirconium bis (methanesulfonate), bis (cyclopentadienyl) zirconium bis (p-toluenesulfonate), bis (cyclopentadienyl) zirconium bis (trifluoromethanesulfonate), bis (cyclopentadienyl) zirconium Trifluoromethanesulfonatochloride, bis (cyclopentadienyl) zirconium bis (benzenesulfonato), bis (cyclopentadienyl) zirconium bis (pentafluorobenzenesulfonate), bis (cyclopentadiene) ) Zirconium benzenesulfonatochloride, bis (cyclopentadienyl) zirconium (ethoxy) trifluoromethanesulfonate, bis (tetramethylcyclopentadienyl) zirconium bis (trifluoromethanesulfonate), bis (indenyl) zirconium bis ( Trifluoromethanesulfonate, ethylene bis (indenyl) zirconium bis (trifluoromethanesulfonate), isopropylidenebis (indenyl) zirconium bis (trifluoromethanesulfonate), (tertiary butylamido) dimethyl (tetramethylcyclopentadienyl) ) Silane dibenzylzirconium, (tertiary butylamido) dimethyl (2,3,4,5-tetramethylcyclopentadienyl) silane dibenzylzirconium

  Indenyl zirconium tris (dimethylamide), indenyl zirconium tris (diethylamide), indenyl zirconium tris (di-n-propylamide), cyclopentadienylzirconium tris (dimethylamide), methylcyclopentadienyl zirconium tris (dimethyl) Amide), (tertiary butylamide) (tetramethylcyclopentadienyl) -1,2-ethanediylzirconium dichloride, (methylamide)-(tetramethylcyclopentadienyl) -1,2-ethanediylzirconium dichloride, ( Ethylamide) (tetramethylcyclopentadienyl) methylenezirconium dichloride, (tertiary butylamide) dimethyl- (tetramethylcyclopentadienyl) silanezirconium dichloride (Benzylamide) dimethyl (tetramethylcyclopentadienyl) silane zirconium dichloride

  (Phenylphosphide) dimethyl (tetramethylcyclopentadienyl) silane zirconium dibenzyl, (phenylamido) dimethyl (tetramethylcyclopentadienyl) silane zirconium dichloride, (2-methoxyphenylamido) dimethyl (tetramethylcyclopentadi) Enyl) silane zirconium dichloride, (4-fluorophenylamido) dimethyl (tetramethylcyclopentadienyl) silane zirconium dichloride, ((2,6-di (1-methylethyl) phenyl) amido) dimethyl (tetramethylcyclopentadiene) Enyl) amidozirconium dichloride

Examples of compounds corresponding to the general formula [VII] include the following compounds.
Bis (methylcyclopentadienyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex, bis (ethylcyclopentadienyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex, bis (methylcyclopentadienyl) zirconium ( Methyl) (tetraphenylborate) tetrahydrofuran complex, bis (ethylcyclopentadienyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, bis (methylcyclopentadienyl) zirconium (hydrido) (tetraphenylborate) tetrahydrofuran complex, Bis (ethylcyclopentadienyl) zirconium (hydrido) (tetraphenylborate) tetrahydrofuran complex, bis (dimethylcycline) Pentadienyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex, bis (trimethylcyclopentadienyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex, bis (tetramethylcyclopentadienyl) zirconium (chloride) (tetraphenyl) Borate) tetrahydrofuran complex, bis (ethyltetramethylcyclopentadienyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex

  Bis (indenyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex, bis (dimethylcyclopentadienyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, bis (trimethylcyclopentadienyl) zirconium (methyl) (tetra Phenylborate) tetrahydrofuran complex, bis (tetramethylcyclopentadienyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, bis (ethyltetramethylcyclopentadienyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, bis (Indenyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, bis (dimethylcyclopentadienyl) Zirconium (hydrido) (tetraphenylborate) tetrahydrofuran complex, bis (trimethylcyclopentadienyl) zirconium (hydrido) (tetraphenylborate) tetrahydrofuran complex, bis (ethyltetramethylcyclopentadienyl) zirconium (hydrido) (tetraphenylborate) ) Tetrahydrofuran complex, bis (trimethylsilylcyclopentadienyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, bis (trimethylsilylcyclopentadienyl) zirconium (hydrido) (tetraphenylborate) tetrahydrofuran complex, bis (trifluoromethylcyclo) Pentadienyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, bis ( Trifluoromethyl cyclopentadienyl) zirconium (hydride) (tetraphenylborate) tetrahydrofuran complex, isopropylidene - bis (indenyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex

  Isopropylidene-bis (indenyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, isopropylidene-bis (indenyl) zirconium (hydrido) (tetraphenylborate) tetrahydrofuran complex, pentamethylcyclopentadienyl (cyclopentadienyl) Zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex, ethyltetramethylcyclopentadienyl (cyclopentadienyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex, pentamethylcyclopentadienyl (cyclopentadienyl) zirconium (Methyl) (tetraphenylborate) tetrahydrofuran complex, ethyltetramethylcyclopentadienyl (cyclopente) Dienyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, pentamethylcyclopentadienyl (cyclopentadienyl) zirconium (hydrido) (tetraphenylborate) tetrahydrofuran complex, ethyltetramethylcyclopentadienyl (cyclopentadienyl) ) Zirconium (hydrido) (tetraphenylborate) tetrahydrofuran complex, isopropylidene (cyclopentadienyl) (fluorenyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex, isopropylidene (cyclopentadienyl) (fluorenyl) zirconium (methyl) ) (Tetraphenylborate) tetrahydrofuran complex, isopropylidene (cyclopentadienyl) (fluorenyl) Luconium (hydrido) (tetraphenylborate) tetrahydrofuran complex, bis (cyclopentadienyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex, bis (cyclopentadienyl) (methyl) zirconium (tetraphenylborate) tetrahydrofuran complex, Bis (cyclopentadienyl) (ethyl) zirconium (tetraphenylborate) tetrahydrofuran complex, bis (cyclopentadienyl) (propyl) zirconium (tetraphenylborate) tetrahydrofuran complex

  Bis (cyclopentadienyl) (phenyl) zirconium (tetraphenylborate) tetrahydrofuran complex, methylcyclopentadienyl (cyclopentadienyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex, ethylcyclopentadienyl (cyclopenta) Dienyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex, bis (ethylcyclopentadienyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex, methylcyclopentadienyl (cyclopentadienyl) zirconium (methyl) (Tetraphenylborate) tetrahydrofuran complex

  Ethylcyclopentadienyl (cyclopentadienyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, methylcyclopentadienyl (cyclopentadienyl) zirconium (hydrido) (tetraphenylborate) tetrahydrofuran complex, ethylcyclopentadi Enyl (cyclopentadienyl) zirconium (hydrido) (tetraphenylborate) tetrahydrofuran complex, dimethylcyclopentadienyl (cyclopentadienyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex, trimethylcyclopentadienyl (cyclopenta) Dienyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex, tetramethylcyclopentadienyl (cycline) Pentadienyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex, bis (pentamethylcyclopentadienyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex, indenyl (cyclopentadienyl) zirconium (chloride) (tetraphenylborate) ) Tetrahydrofuran complex

  Dimethylcyclopentadienyl (cyclopentadienyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, trimethylcyclopentadienyl (cyclopentadienyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, tetramethylcyclopenta Dienyl (cyclopentadienyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, bis (pentamethylcyclopentadienyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, cyclopentadienyl (indenyl) zirconium ( Methyl) (tetraphenylborate) tetrahydrofuran complex, dimethylcyclopentadienyl (cyclopentadienyl) zirconium (hydride) Do) (tetraphenylborate) tetrahydrofuran complex, trimethylcyclopentadienyl (cyclopentadienyl) zirconium (hydrido) (tetraphenylborate) tetrahydrofuran complex, bis (pentamethylcyclopentadienyl) zirconium (hydrido) (tetraphenylborate) ) Tetrahydrofuran complex, indenyl (cyclopentadienyl) zirconium (hydrido) (tetraphenylborate) tetrahydrofuran complex, trimethylsilylcyclopentadienyl (cyclopentadienyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, trimethylsilylcyclopentadi Enyl (cyclopentadienyl) zirconium (hydrido) (tetraphenylborate) tetrahydrofuran , Trifluoromethylcyclopentadienyl (cyclopentadienyl) zirconium (hydrido) (tetraphenylborate) tetrahydrofuran complex, bis (cyclopentadienyl) (trimethylsilyl) zirconium (tetraphenylborate) tetrahydrofuran complex, bis (cyclopenta Dienyl) (triphenylsilyl) zirconium (tetraphenylborate) tetrahydrofuran complex, bis (cyclopentadienyl) [tris (trimethylsilyl) silyl] zirconium (tetraphenylborate) tetrahydrofuran complex

  Bis (cyclopentadienyl) (trimethylsilylmethyl) zirconium (tetraphenylborate) tetrahydrofuran complex, bis (cyclopentadienyl) (benzyl) zirconium (tetraphenylborate) tetrahydrofuran complex, methylene-bis (cyclopentadienyl) zirconium ( Chloride) (tetraphenylborate) tetrahydrofuran complex, ethylene-bis (cyclopentadienyl) zirconium (chloride) (tetraphenylborate) tetrahydrofuran complex, isopropylidene-bis (cyclopentadienyl) zirconium (chloride) (tetraphenylborate) Tetrahydrofuran complex, dimethylsilyl-bis (cyclopentadienyl) zirconium (chloride) (tetraphenylborate) Lahydrofuran complex, methylene-bis (cyclopentadienyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, ethylene-bis (cyclopentadienyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, isopropylidene-bis ( Cyclopentadienyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, dimethylsilyl-bis (cyclopentadienyl) zirconium (methyl) (tetraphenylborate) tetrahydrofuran complex, methylene-bis (cyclopentadienyl) zirconium ( (Hydrido) (tetraphenylborate) tetrahydrofuran complex, ethylene-bis (cyclopentadienyl) zirconium (hydrido) (tetraphenyl) Rate) tetrahydrofuran complex, isopropylidene-bis (cyclopentadienyl) zirconium (hydrido) (tetraphenylborate) tetrahydrofuran complex, dimethylsilyl-bis (cyclopentadienyl) zirconium (hydrido) (tetraphenylborate) tetrahydrofuran complex, bis (Cyclopentadienyl) zirconium (methanesulfonate) (tetraphenylborate) tetrahydrofuran complex, bis (cyclopentadienyl) zirconium (p-toluenesulfonate) (tetraphenylborate) tetrahydrofuran complex, bis (cyclopentadienyl) Zirconium (trifluoromethanesulfonate) (tetraphenylborate) tetrahydrofuran complex, bis (cyclopentadienyl) zirconium (benzene Ruphonato) (tetraphenylborate) tetrahydrofuran complex, bis (cyclopentadienyl) zirconium (pentafluorobenzenesulfonate) (tetraphenylborate) tetrahydrofuran complex, bis (tetramethylcyclopentadienyl) zirconium (trifluoromethanesulfonate) ( Tetraphenylborate) tetrahydrofuran complex, bis (indenyl) zirconium (trifluoromethanesulfonate) (tetraphenylborate) tetrahydrofuran complex, ethylenebis (indenyl) zirconium (trifluoromethanesulfonate) (tetraphenylborate) tetrahydrofuran complex, isopropylidenebis (Indenyl) zirconium (trifluoromethanesulfonate) (tetraphenylborate) tetra Dorofuran complex

  In addition, other Group 3, 4, 5, and 6 metal compounds such as a titanium compound and a hafnium compound may be the same compounds as described above. Further, a mixture of these compounds may be used. In the present invention, clay, clay mineral, or ion-exchange layered compound is used as the component [B]. Clay is usually composed mainly of clay minerals. Further, the ion-exchangeable layered compound is a compound having a crystal structure in which planes constituted by ionic bonds and the like are stacked in parallel with each other with a weak binding force, and means that the contained ions can be exchanged. Most clays are ion-exchangeable layered compounds. Moreover, these clays, clay minerals, and ion-exchangeable layered compounds are not limited to natural products, and may be artificial synthetic products.

  Examples of the component [B] include clays, clay minerals, and ionic crystalline compounds having a layered crystal structure such as hexagonal close-packed type, antimony type, CdCl2 type, CdI2 type, and the like. Specific examples of the component [B] include allophanes such as allophane, kaolins such as dickite, nacrite, kaolinite, and anokisite, halloysites such as metahalloysite and halloysite, and serpentine such as chrysotile, risardite, and antigolite. Stone group, montmorillonite, sauconite, beidellite, nontronite, saponite, hectorite, etc. Examples include clay, gyrome clay, hysingelite, pyrophyllite, and ryokdeite group. These may form a mixed layer. Among the specific examples of the component (B), preferably kaolins such as dickite, nacrite, kaolinite, anorcite, halloysites such as metahalloysite, halloysite, serpentine such as chrysotile, lizardite, antigolite, montmorillonite, Examples thereof include smectites such as sauconite, beidellite, nontronite, saponite, hectorite, vermiculite minerals such as vermiculite, and mica minerals such as illite, sericite, and chlorophyll. Particularly preferred are montmorillonite, sauconite, beidellite, nontronite , Smectites such as saponite and hectorite.

  In addition, the [B] component is preferably subjected to chemical treatment. Here, as the chemical treatment, any of a surface treatment for removing impurities adhering to the surface and a treatment that affects the crystal structure and chemical composition of clay can be used. Specific examples include acid treatment, alkali treatment, salt treatment, organic matter treatment, and the like. In addition to removing impurities on the surface, the acid treatment elutes cations such as Al, Fe, and Mg having a crystalline structure. Alkali treatment destroys the crystal structure of the clay, resulting in a change in the structure of the clay. In the salt treatment and the organic matter treatment, an ion complex, a molecular complex, an organic derivative, or the like can be formed, and the surface area or interlayer distance can be changed.

  By utilizing the ion exchange property and replacing the exchangeable ions between the layers with other large and bulky ions, a layered material in a state where the layers are expanded can be obtained. These chemical treatment, ion exchange, and the like may be performed alone or in combination of two or more treatments. The component [B] may be used as it is, or may be used after newly adsorbing and adsorbing water, or after heat dehydration. Moreover, even if it uses independently, 2 or more types of the said solid may be mixed and used.

  The [B] component uses spherical particles having an average particle size of 5 μm or more. Preferably, spherical particles having an average particle size of 10 μm or more are used. More preferably, spherical particles having an average particle diameter of 10 μm or more and 100 μm or less are used. The average particle diameter here is represented by a number average particle diameter calculated by image processing of an optical micrograph (magnification 100 times) of the particles. In addition, as for the component [B], if the particle shape is spherical, a natural product or a commercially available product may be used as it is, or a particle whose particle shape and particle size are controlled by granulation, sizing, fractionation, etc. is used. May be. The granulation method used here is, for example, stirring granulation method, spray granulation method, rolling granulation method, briquetting, compacting, extrusion granulation method, fluidized bed granulation method, emulsion granulation method, in-liquid Examples thereof include a granulation method and a compression molding granulation method, but the method is not particularly limited as long as the method can granulate the component [B]. Preferred examples of the granulation method include agitation granulation method, spray granulation method, rolling granulation method, and fluidized bed granulation method, and particularly preferred examples include agitation granulation method and spray granulation method. When water is used, water or an organic solvent such as methanol, ethanol, chloroform, methylene chloride, pentane, hexane, heptane, toluene, xylene or the like is used as a dispersion medium for the raw slurry. Preferably, water is used as a dispersion medium.

  The concentration of the component [B] in the slurry material for spray granulation from which spherical particles are obtained is 0.1 to 70%, preferably 1 to 50%, particularly preferably 5 to 30%. The inlet temperature of the hot air for spray granulation from which spherical particles are obtained varies depending on the dispersion medium, but when water is taken as an example, the temperature is 80 to 260 ° C, preferably 100 to 220 ° C. Moreover, you may use an organic substance, an inorganic solvent, a permanent salt, and various binders in the case of granulation. Examples of the binder used include sugar, dextrose, corn syrup, gelatin, glue, carboxymethylcelluloses, polyvinyl alcohol, water glass, magnesium chloride, aluminum sulfate, aluminum chloride, magnesium sulfate, alcohols, glycol, starch, casein, Examples thereof include latex, polyethylene glycol, polyethylene oxide, tar, pitch, alumina sol, silica gel, gum arabic, and sodium alginate.

Further, as the component [C] in the present invention, trimethyl aluminum, triethyl aluminum, tripropyl aluminum, trialkyl aluminum such as tri-isobutyl aluminum.

  Regarding the contact method for obtaining a polymerization catalyst from [A] component, [B] component and [C] component, when [B] component is clay or clay mineral, transition metal and clay in [A] component Alternatively, the molar ratio of the hydroxyl group in the clay mineral and the aluminum in the [C] organoaluminum compound is 1: 0.1 to 100,000: 0.1 to 10,000,000, particularly 1: 0.5 to 10,000: 0.5. It is preferable to carry out the contact reaction at ˜1000000.

  The contact may be carried out in an inert gas such as nitrogen or in an inert hydrocarbon solvent such as pentane, hexane, heptane, toluene, xylene. The contact temperature is between −20 ° C. and the boiling point of the solvent, particularly preferably between room temperature and the boiling point of the solvent. Examples of the olefin used for the polymerization include ethylene, propylene, 1-butene, 1-hexene, 3-methyl-1-butene, 3-methyl-1-pentene, 4-methyl-1-pentene, vinylcycloalkane, styrene, These derivatives are mentioned. In addition to homopolymerization, the polymerization can be suitably applied to generally known random copolymerization and block copolymerization. In particular, it is preferable as a method for producing a high molecular weight polyolefin because a decrease in molecular weight due to a kneading process for adding a stabilizer can be avoided.

  In the present invention, the stabilizers are added alone or in combination with each other to the polymerization medium at the start of polymerization, during polymerization, or at the end of polymerization before the termination of polymerization. In the case of batch polymerization, the compound, optionally with other additives, is preferably added at the start. In the case of continuous polymerization, which is often performed on an industrial scale, the compound, optionally with other additives, is added continuously as well, separately from or together with the monomer.

The stabilizer used in the present invention, is as it is a stabilizer that reduces the polymerization activity of the metallocene catalysts include phenolic antioxidants having a mosquito carbonyl group.

  Examples of the phenolic antioxidant having a carbonyl group include 1,6-hexamethylenebis [(3,5-ditert-butyl-4-hydroxyphenyl) propionic acid amide], 1,3,5-tris ( 2,6-dimethyl-3-hydroxy-4-tert-butylbenzyl) isocyanurate, 1,3,5-tris (3,5-ditert-butyl-4-hydroxybenzyl) isocyanurate, 2-tert-butyl -4-methyl-6- (2-acryloyloxy-3-tert-butyl-5-methylbenzyl) phenol, stearyl (3,5-ditert-butyl-4-hydroxyphenyl) propionate, thiodiethylene glycol bis [(3 , 5-ditertiarybutyl-4-hydroxyphenyl) propionate], 1,6-hexamethylenebis [(3,5-ditertiarybutyl- -Hydroxyphenyl) propionate], tetrakis (3- (3,5-ditert-butyl-4-hydroxyphenyl) propionyloxymethyl) methane, bis [3,3-bis (4-hydroxy-3-tert-butylphenyl) ) Butyric acid] glycol ester, bis [2-tert-butyl-4-methyl-6- (2-hydroxy-3-tert-butyl-5-methylbenzyl) phenyl] terephthalate, 1,3,5-tris [ (3,5-ditert-butyl-4-hydroxyphenyl) propionyloxyethyl] isocyanurate, 3,9-bis [1,1-dimethyl-2-{(3-tert-butyl-4-hydroxy-5- Methylphenyl) propionyloxy} ethyl] -2,4,8,10-tetraoxaspiro [5.5] undecane, triethyleneglycol Bis [(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate] and the like, and 0.001 to 1 part by weight, more preferably 0.005 to 0 parts per 100 parts by weight of monomer. .5 parts by weight are used. Of the phenolic antioxidants having a carbonyl group, a compound having the following structure (VIII) is particularly preferred because of its excellent compatibility with polyolefins.

(R ² Represents a tert-butyl group, a methylbenzyl group or a methylphenyl group. )

  In the method for producing a polymer of the present invention, other ordinary resin additives may be added before or during the polymerization as long as the polymerization is not inhibited. Examples of other additives include phosphorus antioxidants, ultraviolet absorbers, metal soaps, hydrotalcite, fillers, lubricants, antistatic agents, pigments, dyes, and plasticizers.

  Examples of phosphorus antioxidants include triphenyl phosphite, trisnonylphenyl phosphite, tris (2,4-ditert-butylphenyl) phosphite, and tris (2,4-ditert-butyl-5-methyl). Phenyl) phosphite, tris [2-tert-butyl-4- (3-tert-butyl-4-hydroxy-5-methylphenylthio) -5-methylphenyl] phosphite, tridecyl phosphite, octyldiphenyl phosphite , Di (decyl) monophenyl phosphite, di (tridecyl) pentaerythritol diphosphite, di (nonylphenyl) pentaerythritol diphosphite, bis (2,4-ditertiarybutylphenyl) pentaerythritol diphosphite, bis (2,6-ditert-butyl-4-methylphenyl) pentaeryth Tall diphosphite, bis (2,4,6-tritert-butylphenyl) pentaerythritol diphosphite, bis (2,4-dicumylphenyl) pentaerythritol diphosphite, tetra (tridecyl) isopropylidenediphenol di Phosphite, tetra (tridecyl) -4,4′-n-butylidenebis (2-tert-butyl-5-methylphenol) diphosphite, hexa (tridecyl) -1,1,3-tris (2-methyl-4-hydroxy) -5-tert-butylphenyl) butane triphosphite, tetrakis (2,4-ditert-butylphenyl) biphenylene diphosphonite, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide 2,2′-methylenebis (4,6-tert-butylphenyl) -2-ethyl Hexyl phosphite, 2,2′-methylenebis (4,6-tert-butylphenyl) -octadecyl phosphite, 2,2′-ethylidenebis (4,6-ditert-butylphenyl) fluorophosphite, Tris (2 -[(2,4,8,10-tetrakis tert-butyldibenzo [d, f] [1,3,2] dioxaphosphin-6-yl) oxy] ethyl) amine, 2-ethyl-2- Examples include phosphites of butylpropylene glycol and 2,4,6-tritert-butylphenol, and even if added before polymerization such as tris (2,4-ditert-butylphenyl) phosphite, the polymerization is not adversely affected. Phosphorous antioxidants are preferred. Such a phosphorus-based antioxidant is used in an amount of 0.001 to 3 parts by weight, more preferably 0.005 to 0.5 parts by weight, based on 100 parts by weight of the monomer.

  Examples of the ultraviolet absorber include 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2- (2′-hydroxy-3 ′, 5′-ditert-butylphenyl) -5- Chlorobenzotriazole, 2- (2'-hydroxy-3'-tert-butyl-5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-5'-tert-octylphenyl) benzotriazole 2- (2′-hydroxy-3 ′, 5′-dicumylphenyl) benzotriazole, 2- (2′-hydroxy-3′-tert-butyl-5′-carboxyphenyl) benzotriazole, 2'-hydroxyphenyl) benzotriazoles; phenyl salicylate, resorcinol monobenzoate, 2,4-ditertiarybutylphenyl-3,5-ditertiarybutyl-4- Benzoates such as droxybenzoate, 2,4-ditert-amylphenyl-3,5-ditert-butyl-4-hydroxybenzoate, hexadecyl-3,5-ditert-butyl-4-hydroxybenzoate; 2-hydroxybenzophenones such as 4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 5,5′-methylenebis (2-hydroxy-4-methoxybenzophenone); Cyanoacrylates such as α-cyano-β, β-diphenylacrylate, methyl-2-cyano-3-methyl-3- (p-methoxyphenyl) acrylate; 2- (2-hydroxy-4-octoxyphenyl)- 4,6-bis (2,4-ditert-butylphenyl) -s-tria 2- (2-hydroxy-4-methoxyphenyl) -4,6-diphenyl-s-triazine, 2- (2-hydroxy-4-propoxy-5-methylphenyl) -4,6-bis (2, And triaryltriazines such as 4-ditertiarybutylphenyl) -s-triazine. Such an ultraviolet absorber is used in an amount of 0.001 to 5 parts by weight, more preferably 0.005 to 0.5 parts by weight with respect to 100 parts by weight of the monomer.

  The use of the polymer obtained by the present invention is not particularly limited, and is known as extrusion molding, injection molding, hollow molding, blow, film, sheet, molded article as an automobile part, building material, agricultural material, packaging material, daily use Used for sundries and toys.

The present invention will be described in more detail with reference to examples. However, the present invention is not limited by the following examples. Of the following Examples 1-1, 1-2, and 1-3, Examples 1-1 and 1-2 are examples of the present invention, and Example 1-3 is a reference example.

Example 1 and Comparative Example 1
(Pretreatment of additives)
5.0 g of triisobutylaluminum and the stabilizer shown in Table 1 were added to 50 ml of toluene so that the molar ratio of functional groups was 6: 5, and the mixture was stirred at room temperature for 2 hours to inactivate the catalyst. A stabilizer solution was obtained.

(Stabilizer in comparative example)
Comparative Examples 1-1 to 1-4 were used alone without being treated with triisobutylaluminum.

(polymerization)
300 ml of toluene was added to a 1000 ml autoclave purged with nitrogen. Toluene solution in which 1 ml of stabilizer solution described in Table 1 (100 mg as a stabilizer), methylaluminoxane (MMAO-3A manufactured by Tosoh Finechem Co., Ltd .: 9 mmol as aluminum) and 1.28 mg of ethylenebis (tetrahydroindenyl) zirconium chloride are dissolved. 2 ml was added sequentially. The inside of the autoclave was replaced with a propylene atmosphere, a pressure of 5 kgf / cm ² G was applied with propylene, and a polymerization reaction was performed at 50 ° C. for 1.5 hours. After 50 ml of ethanol was added to the reaction solution to stop the polymerization reaction, the solvent was removed under reduced pressure, and then the polymer was dried overnight at 60 ° C. in a vacuum to obtain polypropylene powder.

(Evaluation of effects on catalyst activity)
The influence on catalyst activity was evaluated by the yield and molecular weight of the obtained polypropylene. The molecular weight is determined by gel permeation chromatography (equipment: GPC2000, manufactured by Waters, column: 2 Styragel HT6E and 1 Styragel HT2, manufactured by Waters, measuring temperature 135 ° C., solvent: orthodichlorobenzene, concentration: 6 mg / 10 g). Average molecular weight was measured.

(Evaluation of stabilization effect)
The resulting polypropylene powder was evaluated for its stabilizing effect by changing the molecular weight after 120 hours and after 240 hours in a 100 ° C. gear oven.

  From Comparative Example 1-2 and Comparative Example 1-3, it is clear that a phenolic antioxidant having a carbonyl group or a hindered amine compound inhibits the polymerization reaction when added at the start of polymerization. On the other hand, phenolic antioxidants and hindered amine compounds having a carbonyl group treated with alkylaluminum do not inhibit the polymerization. Moreover, the stabilizer used from Examples 1-1 to 1-3, Comparative Example 1-1, and Comparative Example 1-4 shows the stabilizing effect of polypropylene, and the stabilizer is stabilized even when treated with alkylaluminum. It is also clear that the effect is not impaired.

  From the above results, when the organoaluminum and the stabilizer are premixed, the complex or other association state exists, and the influence on the catalyst is suppressed, and the complex or other association state exists. In the mixture of stabilizer and organoaluminum that forms a stabilizer, the structure of the stabilizer itself is not impaired, and when the deterioration of the resin after polymerization is suppressed, the association with the organoaluminum is broken or stabilized in the associated state. It is estimated that the effect is shown.

Claims (8)

When a monomer having an ethylenically unsaturated bond is polymerized using a metallocene catalyst made of a transition metal, one or more phenolic antioxidants having a tertiary butyl group and a carbonyl group are premixed with a trialkylaluminum compound. A method for producing a stabilized polymer, which is then added to a catalyst system or a polymerization system before polymerization.   The method for producing a polymer according to claim 1, wherein the trialkylaluminum compound is triisobutylaluminum.   The method for producing a polymer according to claim 1, wherein the transition metal is a metal of Group 3 to Group 11 of the periodic table.   The method for producing a polymer according to claim 1, wherein the transition metal is a metal of Group 3, Group 4, Group 5, Group 8, Group 10 of the Periodic Table.   The method for producing a polymer according to claim 1, wherein the transition metal is Ti, Zr, Hf, V, Fe, Ni, Pd, Pt, Y or Sm.   The method for producing a polymer according to claim 1, wherein the monomer having an ethylenically unsaturated bond is an α-olefin.   The method for producing a polymer according to claim 1, wherein the monomer having an ethylenically unsaturated bond is ethylene. The method for producing a stabilized polymer according to claim 1, wherein the phenolic antioxidant having a tertiary butyl group and a carbonyl group has a structure represented by the general formula (VIII ') .

(R ² represents a tertiary butyl group, a methylbenzyl group or a methylphenyl group.)