Ethylene-alfa-olefin copolymer and molded article
A technology of olefin copolymers and moldings, which is applied in the field of moldings, and can solve problems such as insufficient melt tension, insufficient expansion ratio of ethylene-α-olefin copolymers, and low mechanical strength
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Embodiment 1
[0310] (1) Preparation of component (B)
[0311] In a 50-liter reactor with a stirrer after nitrogen replacement, 9.68 kg of heat-treated silica (Sylopol 948 manufactured by Davison Company; average particle diameter=55 μm; pore volume= 1.67ml / g; specific surface area = 325m 2 / g) as a solid carrier of the component (b). After adding 100 liters of toluene, the reactor was cooled to 2°C. To this was added dropwise 26.3 liters of a toluene solution (2.9 M) of methylaluminoxane over 1 hour. After stirring at 5°C for 30 minutes, it was heated to 95°C over 90 minutes and stirred for 4 hours. Then, after cooling to 40 degreeC, it left still for 40 minutes, solid content was precipitated, and the slurry part of the upper layer was removed. As a washing operation, 100 liters of toluene was added thereto, and after stirring for 10 minutes, the stirring was stopped, and the mixture was left to stand to allow the solid content to settle, and the upper slurry portion was similarly rem...
Embodiment 2
[0317] (1) Polymerization
[0318] After drying under reduced pressure, the inside of an autoclave with a stirrer with an internal volume of 3 liters replaced with argon was vacuumed, and hydrogen gas was added so that the partial pressure of hydrogen gas reached 0.004 MPa, and 230 ml of 1-hexene was added to obtain a polymerization reaction. 650 g of butane as a solvent is heated up to 70°C. Then, ethylene gas was added so that the partial pressure of ethylene gas became 1.6 MPa, and the inside of the system was stabilized. As a result of gas chromatography analysis, the gas composition in the system was hydrogen = 0.20 mol%. 0.9 ml of a hexane solution of triisobutylaluminum adjusted to a concentration of 1 mol / l as the organoaluminum compound (C) was put thereinto. Next, 35.6 mg of the powdery contact mixture (X-1) prepared in Example 1 (2) above was charged. During the polymerization, ethylene and 1-hexene were polymerized at 70° C. for 180 minutes while continuously su...
Embodiment 3
[0320] (1) Preparation of Contact Mixture (X-2)
[0321] 4 g of the component (B) prepared in Example 1(1) and 50 ml of toluene were added to a 200 ml glass eggplant-shaped flask replaced with nitrogen, and it was made into a slurry state. Next, 10.4 ml of a toluene solution of bis(n-butylcyclopentadienyl) zirconium dichloride [equivalent to the transition metal compound (A1)] whose concentration was adjusted to 2 μmol / ml was dropped into the dropping funnel, and the concentration was adjusted to After mixing 4.1 ml of a toluene solution of 1 μmol / ml diphenylmethylene (cyclopentadienyl) (9-fluorenyl) zirconium dichloride [equivalent to the transition metal compound (A2)], the This liquid mixture was added dropwise over about 30 minutes while the slurry in the flask was being filled. After the dropwise addition, the eggplant-shaped flask containing the slurry of the mixture was transferred to an oil bath at 80°C, the temperature was raised, and the mixture was reacted for 1 ho...
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Abstract
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