Ethylene → Ethene;oct-1-ene

100 g of a polypropylene having I.V.=1.49 (dL/g), a poured density of 0.363 (g/cc) and a porosity by mercury of 0.375 cc/g, were charged into a 4.2 L reactor through a hole in the ceiling of the reactor, under propane atmosphere (pressure=1 bar), at room temperature, without any stirring. 250 g of propane were added and than temperature was brought to 40° C. In the meantime the 20 mg of metallocene, TIOA, and MAO (Al/Zr=200 mol/mol; MAO/TIOA: 1:5) were dissolved in an amount of toluene such that a total volume of 10 ml was reached, and stirred at room temperature for 10 minutes. The catalyst solution was then injected into the reactor by a little nitrogen overpressure. The suspension in the reactor was stirred at 40° C. for 10 minutes. The liquids present in the reactor were then flashed. 25 g of ethylene and 4.20 g of 1-octene were charged in the reactor, while temperature was brought to 75° C. The final pressure was 6 bar-g. During the polymerization reaction, the pressure was maintained constant by continuously feeding ethylene. During the polymerization reaction a 50 vol. % solution of 1-octene in pentane was continuously added dropwise. After the period of time indicated in table 8 the polymerization was stopped by quickly degassing the monomers. The polymer was collected and plunged in 800 mL of methanol, then filtered off and dried in vacuum at 60° C. for 2 hours.

1. customat room temperature
2. customwas brought to 40° C
3. stirringThe suspension in the reactor was stirred at 40° C. for 10 minutes
4. customwas brought to 75° C
5. customDuring the polymerization reaction
6. additionwas continuously added dropwise
7. customby quickly degassing the monomers
8. customThe polymer was collected
9. filtrationfiltered off
10. customdried in vacuum at 60° C. for 2 hours

ORD record

ord-68f3ebad9636489f952644533245524a

Source dataset

uspto-grants-2004_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06787619B2