Ethylene → Ethene propene 1-butene

Temperature

65 °C

In a 2000 ml polymerization device thoroughly purged with nitrogen, 917 ml of dry hexane, 85 g of 1-butene and triisobutylaluminum (1.0 mmol) were placed at ordinary temperature, then the internal temperature of the polymerization device was raised to 65° C., and the system was pressurized to 0.77 MPa with propylene, followed by adjusting the pressure in the system to 0.78 MPa with ethylene. Subsequently, in the polymerization device, a toluene solution obtained by contacting 0.002 mmol of dimethylmethylene(3-t-butyl-5-methylcyclopentadienyl)fluorenyl zirconium dichloride with 0.6 mmol (in terms of aluminum) of methylaluminoxane (available from Tosoh Finechem Corporation) was introduced. With maintaining the internal temperature at 65° C. and the pressure in the system at 0.78 MPa with ethylene, polymerization was carried out for 20 minutes, and thereafter, 20 ml of methanol was added to terminate the polymerization. After the pressure was released, a polymer was precipitated from the polymerization solution in 2 liters of methanol, and the precipitated polymer was dried at 130° C. for 12 hours under vacuum to obtain 60.4 g of a polymer.

1. customIn a 2000 ml polymerization device
2. additionwas introduced
3. temperatureWith maintaining the internal temperature at 65° C.
4. customto terminate
5. customthe polymerization
6. customa polymer was precipitated from the polymerization solution in 2 liters of methanol
7. customthe precipitated polymer was dried at 130° C. for 12 hours under vacuum

ORD record

ord-620388e8810c4ac4ad3e17e4b335e191

Source dataset

uspto-grants-2012_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08329821B2