Ethylene → Ethene propene 1-butene

Temperature

20 °C

To a 4000 ml polymerization apparatus dried under reduced pressure and thoroughly purged with nitrogen, 1716 ml of dry hexane, 66.6 g of 1-butene, and triisobutylaluminum (1.0 mmol) were charged at normal temperature, then the temperature inside the polymerization apparatus was maintained at 20° C., and the polymerization apparatus was pressurized with propylene to 0.55 MPa and subsequently pressurized with ethylene to 0.80 MPa. Thereafter, a toluene solution in which 0.002 mmol of rac-dimethylsilylenebis(2-methyl-4-phenyl-indenyl)zirconium dichloride and methylaluminoxane (manufactured by Tosoh Finechem Corp.) in terms of 0.3 mmol of aluminum were contacted, was added to the polymerization vessel, and polymerization was conducted for 40 minutes while maintaining the internal temperature at 20° C. and the total pressure at 0.80 MPa by continuously supplying ethylene. The polymerization was stopped by adding 20 ml of methanol. After depressurizing, a polymer was precipitated out of the polymerization solution in 2 L of methanol, and was dried in a vacuum at 130° C. for 12 hours. The obtained polymer was 109.1 g and the polymerization activity was 163.7 kg/mmol-cat-hr. The polymer had a composition of 57.4 mol % of propylene content, 28.0 mol % of ethylene content and 14.6 mol % of 1-butene content, and had an intrinsic viscosity [η] of 2.98 dl/g.

1. customTo a 4000 ml polymerization apparatus
2. customdried under reduced pressure
3. additionwere charged at normal temperature
4. additionwas added to the polymerization vessel, and polymerization
5. temperaturewhile maintaining the internal temperature at 20° C.
6. customa polymer was precipitated out of the polymerization solution in 2 L of methanol
7. customwas dried in a vacuum at 130° C. for 12 hours

ORD record

ord-f7ed3a07b49e49c882bcc1031473cf84

Source dataset

uspto-grants-2011_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07879960B2