Ethylene-a-olefin copolymer and molded article
An olefin copolymer, ethylene technology, applied in the field of molded bodies, can solve the problems of insufficiently satisfying requirements, insufficiently satisfying requirements in extrusion load and melt tension, etc.
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[0237] In preparation of the catalyst for polymerization, in addition to the transition metal compound (A1), the transition metal compound (A2) and the catalyst co-agent component (B), the organoaluminum compound (C) may be brought into contact therewith. The amount of the organoaluminum compound (C) used is calculated as the number of moles of aluminum atoms of the organoaluminum compound (C) per 1 mole of the total moles of the transition metal compound (A1) and the transition metal compound (A2), Preferably it is 0.1-1000, More preferably, it is 0.5-500, More preferably, it is 1-100.
[0238] Examples of the organoaluminum compound (C) include trimethylaluminum, triethylaluminum, tri-n-propylaluminum, tri-n-butylaluminum, triisobutylaluminum, tri-n-hexylaluminum, tri-n-octylaluminum, etc. Trialkylaluminum; dimethylaluminum chloride, diethylaluminum chloride, di-n-propylaluminum chloride, di-n-butylaluminum chloride, diisobutylaluminum chloride, di-n-hexylaluminum chloride, ...
Embodiment 1
[0302] (1) Preparation of solid catalyst components
[0303] In a reactor equipped with a stirrer replaced by nitrogen, add heat-treated silicon dioxide (Sylopol 948 manufactured by Davison Co., Ltd.; 50% volume average particle diameter=55 μm; pore volume= 1.67ml / g; specific surface area = 325m 2 / g) 2.8kg and 24kg of toluene, and stirred. Then, after cooling to 5°C, a mixed solution of 0.9 kg of 1,1,1,3,3,3-hexamethyldisilazane and 1.4 kg of toluene was added over 30 minutes while maintaining the temperature at 5°C. drop into the reactor. After completion of the dropwise addition, the mixture was stirred at 5° C. for 1 hour, then heated up to 95° C., stirred at 95° C. for 3 hours, and filtered. The obtained solid product was washed 6 times with 20.8 kg of toluene. Then, 7.1 kg of toluene was added to make a slurry, which was allowed to stand overnight.
[0304] Into the slurry obtained above, 1.73 kg of a hexane solution of diethylzinc (diethylzinc concentration: 50% by...
Embodiment 2
[0310] (1) Polymerization
[0311] Evacuate the autoclave with a stirrer with an internal volume of 3 liters filled with argon after drying under reduced pressure, add hydrogen to make the partial pressure 0.01 MPa, add 200 ml of 1-hexene, and 650 g of butane as a polymerization solvent, and raise the temperature to 70°C. Then, ethylene was introduced to make the partial pressure 1.6 MPa to stabilize the inside of the system. As a result of gas chromatography analysis, hydrogen=0.59 mol% in the gas composition in the system. 0.9 ml of a hexane solution of triisobutylaluminum adjusted to a concentration of 1 mol / l as the organoaluminum compound (C) was charged into the system. Next, 0.3 ml of a toluene solution of racemic ethylene bis(1-indenyl)zirconium diphenoxide [corresponding to the transition metal compound (A1)] adjusted to a concentration of 2 μmol / ml, and dioxane adjusted to a concentration of 0.1 μmol / ml were added. Phenylmethylene (cyclopentadiene) (9-fluorene) zi...
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