Ethylene → Ethene propene 1-butene

Participants

Reaction Conditions

Reaction Steps

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.

Provenance & Evidence