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Ethylene-a-olefin copolymer

An olefin copolymer and copolymer technology, applied in the field of ethylene-α-olefin copolymer, can solve the unsatisfactory problems of ethylene-based polymers

Inactive Publication Date: 2012-08-15
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above-mentioned ethylene-based polymers are unsatisfactory in terms of balance between mechanical strength, extrusion load at the time of processing, and coiling performance in a high-temperature region.

Method used

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  • Ethylene-a-olefin copolymer
  • Ethylene-a-olefin copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0095] (1) Preparation of co-catalyst carrier

[0096] A 200-mL separable flask with a tank diameter of 58 mm and equipped with two baffle fingers and a Pfaudler-type impeller with a diameter of 35 mm was purged with nitrogen, and 60 mL of toluene as a solvent and the 10.6 g of silica (Sylopol 948 produced by DavisonCo. Ltd.; average particle diameter: 55 μm; pore volume: 1.67 mL / g; specific surface area: 325 m 2 / g) into the flask and stirred. Subsequently, 21.1 mL of a hexane solution of diethylzinc having a diethylzinc concentration of 2 mmol / mL was charged into the flask and stirred. Thereafter, the flask was cooled to 5°C, and the temperature inside the flask was kept at 5°C, and 19.3mL of 1,1-bis(trifluoromethyl)-2,2,2-trifluoroethanol was added dropwise over 30 minutes with a concentration of 2.22mmol / mL of 1,1-bis(trifluoromethyl)-2,2,2-trifluoroethanol in toluene. After the dropwise addition was complete, stirring was continued at 5°C for 1 hour and at 40°C for 1 ...

Embodiment 2）

[0100] A 5 liter autoclave equipped with a stirrer was dried under reduced pressure, flushed with argon, and evacuated. Then, hydrogen gas was added thereto so that the partial pressure could become 0.033 MPa, and then 270 mL of 1-hexene and 1020 g of butane were added. When the temperature in the system rose to 70°C, ethylene was added therein so that the partial pressure could become 1.6 MPa, and the system was stable. Gas chromatographic analysis found that the gas composition in the system included hydrogen at a concentration of 1.86 mol%. 2.0 mL of a heptane solution of triisobutylaluminum having a triisobutylaluminum concentration of 1.0 mmol / mL was added to the system. Subsequently, 1.0 mL of a toluene solution of racemic ethylene bis(1-indenyl) zirconium diphenolate with a concentration of 2 μmol / mL was added, followed by 6.4 mg of the cocatalyst carrier (A1) obtained in Example 1 (1) above. The polymerization reaction was carried out at 70°C for 180 minutes while c...

Embodiment 3）

[0102] A 5 liter autoclave equipped with a stirrer was dried under reduced pressure, flushed with argon, and evacuated. Then, hydrogen gas was added thereto so that the partial pressure could become 0.021 MPa, and then 280 mL of 1-hexene and 1012 g of butane were added. When the temperature in the system rose to 70°C, ethylene was added therein so that the partial pressure could become 1.6 MPa, and the system was stable. Gas chromatographic analysis found that the gas composition in the system included hydrogen at a concentration of 1.08 mol%. 4.0 mL of a heptane solution of triisobutylaluminum having a triisobutylaluminum concentration of 0.5 mmol / mL was added to the system. Subsequently, 1.0 mL of a toluene solution of racemic ethylene bis (1-indenyl) zirconium dichloride at a concentration of 1 μmol / mL was added, and then 4.1 mg of the cocatalyst carrier (A1) obtained in the above-mentioned Example 1(1) was added. The polymerization reaction was carried out at 70°C for 1...

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Abstract

Provided is an ethylene-a-olefin copolymer that has a monomer unit based on ethylene and a monomer unit based on C3-20 a-olefin. Said ethylene-a-olefin copolymer has a melt flow rate between 0.01 and 100 g / 10 min, a density between 860 and 970 kg / m , a molecular weight distribution between 5.5 and 12, and a flow activation energy between 50 and 100 kJ / mol. Letting the maximum take-up velocity of the provided copolymer at 150 DEG C be MTV150 and the maximum take-up velocity at 190 DEG C be MTV190, MTV150 is at least 40 m / min and is less than MTV190.

Description

technical field [0001] The present invention relates to an ethylene-α-olefin copolymer, a resin composition containing the copolymer, and a film formed from the resin composition. Background technique [0002] Ethylene polymers are formed into films, sheets, bottles, etc. through various molding processes such as blown film process, flat die process, blow molding, and injection molding, and are used in various applications. This vinyl polymer needs to have good processability, such as exhibiting low motor load during melt extrusion through an extruder, providing stable air bubbles during the inflation process, and preventing parison sagging during blow molding . For example, a polymer produced by polymerizing ethylene using a polymerization catalyst formed of silica loaded with methylaluminoxane, a specific metallocene complex, and triisobutylaluminum has been proposed, and a A polymer produced by polymerizing ethylene using a polymerization catalyst formed of silica and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/16C08F4/6592C08J5/18
CPCC08F210/16C08J5/18C08J2323/18C08F210/14C08F2500/04C08F2500/11C08F2500/12C08F2500/17C08F2500/20
Inventor 野村淳磨高冲和夫畑山猛野末佳伸川岛康丰
Owner SUMITOMO CHEM CO LTD
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