Process for the preparation of a composition containing ethylene polymers, composition containing ethylene polymers and use thereof
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 5, 2002
Issued Date -
N/A
app pub date -
Apr 14, 2000
filing date -
Dec 21, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Process for the preparation of a composition containing ethylene polymers comprising a polymer of melt index MI.sub.2 of 5 to 1000 g/10 min and a polymer of melt index MI.sub.5 of 0.01 to 2 g/10 min, the ratio of these indices being from 500 to 50,000 and the weight ratio of the two polymers being equal to (30 to 70):(70 to 30), according to which part of the ethylene, a catalyst derived from a transition metal having an intrinsic molecular weight distribution defined by an intrinsic M.sub.w /M.sub.n ratio less than or equal to 10 and a deactivation constant less than or equal to 0.5 h.sup.-1, and a cocatalyst are introduced into a first reactor, polymerization of the ethylene is carried out therein, a mixture comprising one of the polymers, the catalyst and the cocatalyst is drawn off from this reactor and the mixture and another part of the ethylene are introduced into a second reactor, which ethylene is polymerized to form the other polymer.
First Claim
Other Claims data not available
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 12 Citation Count
- C08F Class
- 61.76 % this patent is cited more than
- 23 Age