US 7,507,780 B2
	Polymerization process
Robert O. Hagerty, La Porte, Tex. (US); Kevin B. Stavens, Seabrook, Tex. (US); Marc L. DeChellis, Houston, Tex. (US); D. Brett Fischbuch, Kingwood, Tex. (US); and James M. Farley, League City, Tex. (US)
Assigned to Univation Technologies, LLC, Houston, Tex. (US)
Filed on Oct. 17, 2007, as Appl. No. 11/975,053.
Application 11/975053 is a continuation of application No. 11/515525, filed on Sep. 05, 2006, granted, now 7,300,987.
Application 11/515525 is a continuation of application No. 11/132863, filed on May 19, 2005, granted, now 7,122,607.
Claims priority of provisional application 60/572876, filed on May 20, 2004.
Claims priority of provisional application 60/572786, filed on May 20, 2004.
Claims priority of provisional application 60/581463, filed on Jun. 21, 2004.
Prior Publication US 2008/0045676 A1, Feb. 21, 2008
Int. Cl. C08F 2/34 (2006.01); C08F 10/02 (2006.01)

U.S. Cl. 526—73  [526/68; 526/206; 526/901]

25 Claims

1. A continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of Ziegler-Natta-type catalyst system and a condensable fluid for a period of at least 12 hours where the bed temperature is less than the Critical Temperature and the dew point temperature of the gas composition in the reactor is within 25° C. of the bed temperature.