Ethylene → Ethene propene 1-butene

The propylene/ethylene/1-butene copolymer used for the present invention was prepared, for example, by the method in accordance with Examples 1e to 5e of WO 2004/87775. Specifically, the copolymer was prepared as follows. Namely, in a 2000-mL polymerization reactor fully purged with nitrogen, 917 mL of dry hexane, 90 g of 1-butene, and 1.0 mmol of triisobutylaluminum were charged at normal temperature, the inside temperature of the reactor was elevated to 65° C., and propylene was introduced so that the inside pressure of the reactor increased to 0.77 MPa, and then ethylene was supplied to adjust the inside pressure to 0.79 MPa. To this reactor was added a toluene solution in which 0.002 mmol of dimethylmethylene(3-tert-butyl-5-methylcyclopentadienyl)fluorenylzirconium dichloride and 0.6 mmol (relative to aluminum) of methylaluminoxane (available from Tosoh Finechem Corp.) had been contacted, and the polymerization was performed for 20 min while the inside temperature was kept at 65° C. and the inside pressure was kept at 0.79 MPa by supplying ethylene. The polymerization was terminated by adding 20 mL of methanol, the pressure was released, and the polymer was precipitated from the polymerization solution in 2 L of methanol and dried at 130° C. under vacuum for 12 hr to yield 60.4 g of the desired copolymer.

1. customSpecifically, the copolymer was prepared
2. customNamely, in a 2000-mL polymerization reactor
3. additionwere charged at normal temperature
4. customwas elevated to 65° C.
5. temperatureincreased to 0.77 MPa
6. customwas kept at 65° C.
7. customThe polymerization was terminated
8. additionby adding 20 mL of methanol
9. customthe polymer was precipitated from the polymerization solution in 2 L of methanol
10. customdried at 130° C. under vacuum for 12 hr

ORD record

ord-c523d7bb16f94f4d880ea4cd425c6ae8

Source dataset

uspto-grants-2015_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09217078B2