Catalyst for the production of ethylene polymer and process for producing ethylene polymer
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 11, 2003
Grant Date -
N/A
app pub date -
Apr 3, 2000
filing date -
Apr 1, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A catalyst for the production of an ethylene polymer comprising a specific trivalent alkyl chromium compound, an inorganic oxide solid and optionally an organoaluminum compound (first catalyst), a catalyst for the production of an ethylene polymer comprising the specific trivalent alkyl chromium compound, a specific tetravalent alkyl chromium compound and an inorganic oxide solid (second catalyst) and a process for producing an ethylene polymer using those catalysts. The first catalyst of the present invention does not cause deterioration with the passage of time, is stable to heat and light, has greatly improved activity and can efficiently produce an ethylene copolymer with .alpha.-olefin. The second catalyst of the present invention can efficiently produce an ethylene polymer having low molecular weight and narrow molecular weight distribution suitable for use in injection molding or an ethylene polymer having excellent balance between rigidity and ESCR and also excellent moldability suitable for use in blow molding or film molding.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
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