Process for the production of block copolymer of propylene and ethylene
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 1, 1990
Issued Date -
N/A
app pub date -
Jun 1, 1988
filing date -
Jan 28, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A block copolymer of propylene can be obtained with its quality controlled uniform by conducting at first continuous polymerization of propylene in a polymerization system, receiving a polymer slurry, which has been discharged continuously from the polymerization system, in a batchwise polymerization tank, feeding ethylene to the tank to conduct batchwise polymerization of ethylene and propylene. Upon discharge of a copolymer slurry formed by the preceding batchwise polymerization, at least a predetermined amount of unreacted ethylene is left over in the tank. Into the tank with the unreacted ethylene still left over therein, there are simultaneously charged the polymer slurry from the polymerization system and a deactivator. During this charging, ethylene is not supplied. The charging rate of the deactivator is controlled in such a way that the partial pressure of ethylene in the vapor phase of the tank always reaches a predetermined value at the time point of completion of reception of the polymer slurry therein.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully