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AssigneeSumitomo Chemical Company, Limited
InventorShin-ichi Kumamoto
Estimating the term…
A solid catalyst component for α-olefin polymerization, which comprises a titanium atom, a magnesium atom, a halogen atom, a phthalic acid ester compound, and a 1,3-diether compound, wherein an amount of the 1,3-diether compound contained in the solid catalyst component is 0.1 to 3 mol per one mol of the phthalic acid ester compound contained therein; a process for producing a catalyst for α-olefin polymerization, which comprises the step of contacting at least the above solid catalyst component, an organoaluminum compound, and an external electron donor compound with one another; and a process for producing an α-olefin polymer, which comprises the step of homopolymerizing or copolymerizing an α-olefin in the presence of a catalyst produced by the above process.
A solid catalyst component for α-olefin polymerization, which comprises a titanium atom, a magnesium atom, a halogen atom, a phthalic acid ester compound, and a 1,3-diether compound, wherein an amount of the 1,3-diether compound contained in the solid catalyst component is 0.1 to 3 mol per one mol of the phthalic acid ester compound contained therein, an amount of titanium atom contained in the solid catalyst component is 1.51% to 2.02% by weight, and an amount of the solid catalyst component dried is 100% by weight.
A process for producing a catalyst for α-olefin polymerization, comprising contacting:
A process for producing an α-olefin polymer, comprising homopolymerizing or copolymerizing an α-olefin in the presence of a catalyst for α-olefin polymerization produced by a process comprising:
Dependencies are inferred from the claim text.
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Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double
Monomers containing three or four carbon atoms: propene
Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
Term ended 20 Apr 2025 (estimated)
The present invention relates to a solid catalyst component for α-olefin polymerization; a process for producing a catalyst for α-olefin polymerization; and a process for producing an α-olefin polymer.
Examples of a combination known in the art of catalyst components for a highly stereoregular polymerization of an α-olefin are as follows: (1) a combination of (i) a catalyst component produced by supporting a tetravalent titanium halide on a magnesium halide, (ii) an organoaluminum compound (promoter), and (iii) an organosilicon compound (third component) (JP 57-63310A, JP 58-83006A and JP 61-78803A); (2) a combination of (i) a trivalent titanium compound-containing solid catalyst component produced by a process comprising the steps of (i-1) reducing a titanium compound with an organomagnesium compound in the presence of an organosilicon compound and an ester compound to produce a first solid product, (i-2) contacting the first solid product with an ester compound to produce a second solid produce, and (i-3) contacting the second solid product with a halogenation compound (for example, titanium tetrachloride) and an internal electron donor (for example, an ether compound, and a mixture thereof with an ester compound), (ii) an organoaluminum compound (promoter), and (iii) an external electron donor (third component) (JP 7-216017A); and (3) a combination of (i) a trivalent titanium compound-containing solid catalyst component produced by a process comprising the steps of (i-1) reducing a titanium compound with an organomagnesium compound in the presence of an organosilicon compound and an ester compound to produce a first solid product, and (i-2) contacting the first solid product with a halogenation compound (for example, titanium tetrachloride), an internal electron donor (for example, an ether compound, and a mixture thereof with an ester compound), and an organic acid halide compound, (ii) an organoaluminum compound (promoter), and (iii) an external electron donor (third component) (JP 10-212319A).
However, each of the above-mentioned combinations has a problem in that a great amount of hydrogen as a molecular weight regulator is necessary in order to produce a low molecular weight polypropylene having high stiffness and excellent melt flowability; namely, each of the above-mentioned combinations is inferior in its ability to control a molecular weight with hydrogen.
The component (A) of the present invention can be produced using a phthalic acid ester compound and a 1,3-diether compound in a process for producing a solid catalyst component disclosed in JP 46-34092B, JP 47-41676B, JP 55-23561B, JP 57-24361B, JP 52-39431B, JP 52-36786B, JP 1-28049B, JP 3-43283B, JP 4-80044A, JP 55-52309A, JP 58-21405A, JP 61-181807A, JP 63-142008A, JP 5-339319A, JP 54-148093A, JP 4-227604A, JP 6-2933A, JP 64-6006A, JP 6-179720A, JP 7-116252B, JP 8-134124A, JP 9-31119A, JP 11-228628A, JP 11-80234A or JP 11-322833A. As mentioned below, even when phthalic acid or other derivative thereof (for example, phthaloyl dichloride) than the above-mentioned phthalic acid ester compound is used in a process for producing a solid catalyst component for α-olefin polymerization of the present invention, both phthalic acid and other derivative thereof are converted into a phthalic acid ester compound in said process, respectively.
As a process for producing the component (A), there can be exemplified various processes comprising the step of contacting at least a magnesium compound, a titanium compound, a derivative of phthalic acid and 1,3-diether compound with one another, and specific examples thereof are the following processes (1) to (5): (1) a process comprising the step of contacting a magnesium halide compound, a titanium compound, a derivative of phthalic acid and a 1,3-diether compound with one another; (2) a process comprising the steps of (i) contacting an alcohol solution of a magnesium halide compound with a titanium compound to form a solid component, and (ii) contacting said solid component, a derivative of phthalic acid and a 1,3-diether compound with one another; (3) a process comprising the steps of (i) contacting a solution containing a magnesium halide compound and a titanium compound with a precipitation agent to form a solid component precipitated, and (ii) contacting said solid component, a halogenation compound, a derivative of phthalic acid and a 1,3-diether compound with one another; (4) a process comprising the step of contacting a dialkoxymagnesium compound, a titanium halide compound, a derivative of phthalic acid and a 1,3-diether compound with one another; and (5) a process comprising the step of contacting a solid component containing a magnesium atom, a titanium atom and a hydrocarbyloxy group, a halogenation compound, a derivative of phthalic acid, a 1,3-diether compound and an internal electron donor compound as an optional component with one another.
The above-mentioned “halogenation compound” means a compound capable of introducing one or more halogen atoms into a compound contacted therewith.