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Catalysts for polymerizing olefins and method for producing olefin polymer

A technology for olefin polymerization and compounds, which is applied in the field of catalysts for olefin polymerization and the preparation of olefin polymers. It can solve problems such as poor appearance, increased viscosity of the polymerization system, and increased film viscosity, and achieve the effect of reducing safety and health problems

Inactive Publication Date: 2006-02-15
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, if the ethylene content is increased, on the other side of improving the impact resistance and heat sealing performance, due to the increase in the amount of by-product low-molecular-weight amorphous components, the viscosity of the film will increase, causing blocking, and there is a problem that the value of the product will be damaged.
In addition, low-molecular-weight amorphous components can cause damage to low-temperature heat-sealing performance and impact resistance
[0014] In addition, in the preparation of propylene-ethylene random copolymers, when the preparation is carried out by slurry polymerization using propylene as a solvent, not only is the productivity decreased due to the mutual adhesion of the copolymer particles and the increase in the viscosity of the polymerization system, but also in production. cause great difficulty
[0015] In addition, polypropylene and propylene-based copolymers are usually prepared using catalysts composed of halogenated titanium compounds and organoaluminum compounds. When these catalyst residues are present in a large amount in the polymer, it will cause the color of the formed product to turn yellow and make the The problem of poor appearance
Especially when a large amount of chlorine atoms remain in the polymer, roll scale or eye stains will appear when forming a film, thereby impairing the quality of the film appearance

Method used

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  • Catalysts for polymerizing olefins and method for producing olefin polymer
  • Catalysts for polymerizing olefins and method for producing olefin polymer
  • Catalysts for polymerizing olefins and method for producing olefin polymer

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preparation example Construction

[0130] In the production method of the olefin polymer of the present invention, the particle size of the alkoxy group-containing magnesium compound (ii) can be freely controlled by appropriately selecting the amount of the halogen and / or the halogen-containing compound used.

[0131] The preparation of the alkoxy group-containing magnesium compound (ii) is usually carried out until hydrogen generation is no longer confirmed (usually 1 to 30 hours). Specifically, when iodine is used as a halogen atom, after adding solid iodine to metal magnesium and alcohol, heat to make it react; after dropping an iodine alcohol solution to metal magnesium and alcohol, heat to make it react The method; And when heating magnesium, alcohol solution, dropwise the alcohol solution of iodine to make its reaction method etc. preparation.

[0132] In addition, either method is preferably carried out under an atmosphere of an inert gas (eg, nitrogen, argon) using an inert organic solvent (eg, saturate...

Embodiment 1

[0282] (1) Preparation of alkoxy-containing magnesium compounds

[0283] After fully ventilating the glass reactor with an internal capacity of about 6 liters equipped with a stirrer, about 2430 g of ethanol, 160 g (6.6 moles) of magnesium metal and 15 g of iodine (0.12 g atoms) were added, and the reaction was carried out under reflux while stirring. , until no hydrogen is generated in the system to obtain diethoxymagnesium.

[0284] (2) Preparation of solid catalyst components

[0285] After a three-necked flask with an inner capacity of 0.5 liters equipped with a stirrer was ventilated with nitrogen, 80 ml of dehydrated octane and 16 g of diethoxymagnesium prepared in (1) were added, heated to 40 ° C, and 77 ml of Titanium tetrachloride was heated up to 90°C, and 2.8 ml of diethyl n-butylmalonate was added. The solution was stirred at an internal temperature of 125° C. for 2 hours to carry out a contact operation, and then sufficiently washed with dehydrated octane. Then...

Embodiment 2

[0298] (1) Preparation of solid catalyst components

[0299] After the three-necked flask with an inner capacity of 0.5 liters that is equipped with a stirrer is ventilated with nitrogen, add 80 milliliters of dehydrated octane, 16 g of diethoxymagnesium obtained in (1) of Example 1, and heat to 40 ° C. After adding 2.4 ml of silicon tetrachloride and stirring for 20 minutes, 1.8 ml of diethyl n-butylmalonate was further added. After raising the temperature of the solution to 65° C., 77 ml of titanium tetrachloride was added dropwise, stirred at an internal temperature of 125° C. for 2 hours to carry out a contact operation, and then sufficiently washed with dehydrated octane. Then, 122 ml of titanium tetrachloride was added, and the mixture was stirred at an internal temperature of 125° C. for 2 hours to carry out contact operation again, and then sufficiently washed with dehydrated octane to obtain a solid catalyst component.

[0300] (2) Propylene polymerization

[0301] ...

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Abstract

Solid catalyst components for polymerizing olefins obtained by reacting the following compounds (i), (ii) and (iv) or (i), (ii), (iii) and (iv): (i) a halogen-containing titanium compound; (ii) an alkoxy-containing magnesium compound obtained by reacting metallic magnesium, an alcohol and a halogen and / or a halogen-containing compound containing at least 0.0001 gram atom of a halogen atom per mol of the metallic magnesium; (iii) a halogen-containing silicon compound; and (iv) an electron donating compound represented by the following general formula (I): (I) wherein R<1>represents linear or branched alkyl having 1 or more carbon atoms; and R<2> and R<3> independently represent each liner or branched C1-20 alkyl.

Description

technical field [0001] The present invention relates to a catalyst for olefin polymerization for producing α-olefin monomers or copolymers and a method for producing olefin polymers. Background technique [0002] Typically, olefin polymers are polymerized using Ziegler-Natta catalysts consisting of titanium compounds and organoaluminum compounds. For example, in the production of polypropylene, which is one of olefin polymers, by using a solid catalyst component consisting mainly of titanium, magnesium, chlorine and an electron-donating compound, an organoaluminum compound as a co-catalyst component, and a stereoregularity-improving Catalysts containing alkoxy organosilicon compounds as catalysts have prepared isotactic polypropylene, but at present, in order to improve the catalytic activity during polymerization, improve the stereoregularity of olefin polymers, and stabilize production, efforts are constantly being made to improve polymers. powder form. [0003] For exam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/658C08F10/00C08F297/08C08F10/06C08F110/06C08F210/06
CPCC08F297/083C08F110/06C08F210/06C08F10/06C08F4/651C08F2/001C08F4/6565C08F4/654C08F2500/15C08F2500/17C08F2500/24C08F210/16
Inventor 薮乃内伸浩贞岛孝典
Owner IDEMITSU KOSAN CO LTD