Activating agents and catalysts for the production of ethylene polymers containing the same

Abstract

To provide an activator for polymerization catalysts that makes it possible to produce ethylene polymer particles with a narrow molecular weight distribution and a narrow particle size distribution while achieving a high level of activity, and a catalyst for the production of ethylenic polymers comprising the same.SOLUTION: An activator for polymerization catalysts comprises organic modified clay particles, which are organic modified clay having organic aliphatic groups, characterized by a particle size distribution having at least two peaks, satisfying a) a median size of 8 μm or more and 20 μm or less, b) a main modal diameter of 10 μm or more and 25 μm or less, c) a second modal diameter of 3 μm or more and 4.5 μm or less, and d) the proportion of particles of 5 μm or less being 8 wt.% or less.SELECTED DRAWING: None

Claims

1. An activator for polymerization catalysts, characterized in that it is an organic modified clay having an organic aliphatic group represented by the following general formula (1) as an organic modification group, and is an organic modified clay particle having at least a bimodal particle size distribution that satisfies the following properties a) to d). a) The median diameter is 8 μm or more and 20 μm or less. b) The dominant mode diameter is 10 μm or more and 25 μm or less. c) The second mode diameter is 3 μm or more and 4.5 μm or less. d) The proportion of particles smaller than 5 μm is 8% by weight or less. 【Chemistry 1】 （１） (In the formula, R １ , R ２ , R ３ Each of these is independently a saturated alkyl group having 1 to 30 carbon atoms, an unsaturated alkyl group having 2 to 30 carbon atoms, an alkoxy group having 1 to 30 carbon atoms, an alkylamino group having 1 to 30 carbon atoms, an alkylsilyl group having 1 to 30 carbon atoms, an alkoxyalkylene group having 2 to 30 carbon atoms, a dialkylaminoalkylene group having 3 to 30 carbon atoms, and a trialkylsilylalkylene group having 4 to 30 carbon atoms, and R １ , R ２ , R ３ At least one of them is a saturated alkyl group or an unsaturated alkyl group having 10 or more carbon atoms, M １ (It is an atom in Group 15 of the periodic table.)

2. The polymerization catalyst activator according to claim 1, characterized in that it is an activator for transition metal compounds and is for use as a single-site polymerization catalyst.

3. A metallocene compound (A) represented by the following general formula (2) or (3), 【Chemistry 2】 （２） 【Transformation 3】 （３） [wherein, M ２ and M ３ is a titanium atom, a zirconium atom or a hafnium atom, X is each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an alkylamino group having 1 to 20 carbon atoms, an alkylsilyl group having 1 to 20 carbon atoms, an alkoxyalkylene group having 2 to 20 carbon atoms, a dialkylaminoalkylene group having 3 to 20 carbon atoms, a trialkylsilylalkylene group having 4 to 20 carbon atoms, R ４ and R 7 are a cyclopentadienyl group represented by the following general formula (4) or an indenyl group represented by the following general formula (5), 【Chemistry 4】 （４） 【Transformation 5】 （５） (In the formula, R ９ ~R １２ and R １３ ~R １８ Each of these is independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, an alkylamino group having 1 to 20 carbon atoms, an alkylsilyl group having 1 to 20 carbon atoms, an alkoxyalkylene group having 2 to 20 carbon atoms, a dialkylaminoalkylene group having 3 to 20 carbon atoms, and a trialkylsilylalkylene group having 4 to 20 carbon atoms. R 5 and R ８ is an indenyl group represented by the above general formula (5) or a fluorenyl group represented by the following general formula (6), 【Transformation 6】 （６） (In the formula, R １９ ~R ２６ Each of these is independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, an alkylamino group having 1 to 20 carbon atoms, an arylamino group having 6 to 30 carbon atoms, an arylalkylamino group having 7 to 30 carbon atoms, an alkylsilyl group having 1 to 20 carbon atoms, an alkoxyalkylene group having 2 to 20 carbon atoms, a dialkylaminoalkylene group having 3 to 20 carbon atoms, and a trialkylsilylalkylene group having 4 to 20 carbon atoms. R ６ R is represented by the following general formula (7) or general formula (8). ４ It is a bridge unit of R 5, 【Transformation 7】 （７） 【Transformation 8】 （８） (In the formula, R ２７ ~R ２８ and R ２９ ~R ３０ Each of these is independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 30 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an alkylamino group having 1 to 20 carbon atoms, an alkylsilyl group having 1 to 20 carbon atoms, an alkoxyalkylene group having 2 to 20 carbon atoms, a dialkylaminoalkylene group having 3 to 20 carbon atoms, and a trialkylsilylalkylene group having 4 to 20 carbon atoms. ４ (These are silicon atoms, germanium atoms, or tin atoms.) l is an integer between 1 and 5. As organically modified clay particles (B), the polymerization catalyst activator according to claim 1 or 2, A catalyst for producing ethylene polymers, characterized by comprising an organoaluminum compound (C).

4. The catalyst for producing ethylene polymers according to claim 3, characterized in that the organoaluminum compound (C) is one of trimethylaluminum, triethylaluminum, tri-n-propylaluminum, tri-iso-propylaluminum, tri-n-butylaluminum, tri-iso-butylaluminum, or tri-tert-butylaluminum.

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