Ethylene/alpha-olefin copolymer
An olefin copolymer, a technology of the copolymer, applied in the field of ethylene/α-olefin copolymer, can solve the problems such as high density polyethylene that has not been properly developed and supplied
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[0200] 1-1. Preparation of ligand compounds
[0201] 2.331 g (10 mmol) of indenoindole was added to a dry 250 mL Schlenk bottle and 40 mL of ether was injected under argon. The ether solution was cooled to 0°C, and then 4.8 mL (12 mmol) of a 2.5 M solution of nBuLi in hexane was slowly added dropwise thereto. The reaction mixture was slowly warmed to room temperature and then stirred until the next day. Another 250 mL Schlenk flask was charged with 20 mL of diethyl ether, followed by 3.6 mL (30 mmol) of dichloromethyl(tert-butoxyhexyl)silane. The flask was cooled to -78°C and a lithiated solution of indenoindole was injected into it through a cannula. After the injection was complete, the mixture was slowly warmed to room temperature and then stirred for about 5 hours and then for one day. Then, the flask was quenched by adding 50 ml of water, the organic layer was separated and washed with MgSO 4 dry. The ether used as solvent was removed under reduced pressure. ...
preparation Embodiment 1
[0222] Preparation Example 1: Preparation of Supported Catalyst
[0223] 50 mL of the toluene solution was added to a 300 mL glass reactor, 10 g of dry silica (SP 2410, manufactured by Grace Davison (Grace Davison)) was added thereto, and then the reactor temperature was raised to 40° C. Stir at the same time. To this was added 60 mL of a 10 wt% methylaluminoxane (MAO) / toluene solution. After raising the temperature to 60°C, the mixture was stirred at 200 rpm for 12 hours. After the reactor temperature was lowered to 40°C, stirring was stopped and settling was performed for 10 minutes, and then the reaction solution was decanted. 100 mL of toluene was added thereto again and stirred for 10 minutes. Agitation was stopped and settling was carried out for 10 minutes, and the toluene solution was decanted.
[0224] 50 mL of toluene was added to the reactor, 0.50 g of the metallocene compound of Synthesis Example 1 as a high molecular weight catalyst precursor and 10 m...
Embodiment 1
[0228] The catalyst was prepared by weighing 50 mg of the supported catalyst prepared in Preparation Example 1 in a dry box, putting it into a 50 mL glass bottle, sealing it with a rubber septum, and taking the bottle out of the dry box. The polymerization was carried out in a 2L metal alloy reactor equipped with a mechanical stirrer, capable of temperature control and used under high pressure.
[0229] 1 L of hexane containing 1.0 mmol of triethylaluminum and 8 mL of 1-butene were put into the reactor, and the supported catalyst prepared above was added to the reactor without contacting with air, at 80° C. and 10Kgf / cm 2 The polymerization was carried out for 1 hour while continuously supplying the ethylene monomer gas under the pressure. The polymerization was terminated by first stopping the stirring, and venting and removing the ethylene gas. The polymerization solvent was removed from the obtained polymer by filtering it, and the polymer was dried in a vacuum oven ...
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