Patent application number | Description | Published |
20080214385 | Catalyst composition and methods for its preparation and use in a polymerization process - The present invention relates to a catalyst composition and a method for making the catalyst composition of a polymerization catalyst and a carboxylate metal salt. The invention is also directed to the use of the catalyst composition in the polymerization of olefin(s). In particular, the polymerization catalyst system is supported on a carrier. More particularly, the polymerization catalyst comprises a bulky ligand metallocene-type catalyst system. | 09-04-2008 |
20090018279 | Method for controlling sheeting in gas phase reactors - Embodiments of the present invention relate to measuring and controlling static in a gas phase reactor polymerization. In particular, embodiments relate to monitoring carryover static in an entrainment zone during gas phase polymerization to determine the onset of reactor discontinuity events such as chunking and sheeting. Embodiments also relate to monitoring carryover static to determine the need for effective additions of continuity additives that minimize reactor static activity and thereby preventing discontinuity events. | 01-15-2009 |
20100298511 | METALLOCENE CATALYSTS AND THEIR USE IN POLYMERIZATION PROCESSES - A process for polymerizing olefin(s) utilizing a cyclic bridged metallocene catalyst system to produce polymers with improved properties is provided. The catalyst system may include a cyclic bridged metallocene, L | 11-25-2010 |
20110077370 | CONTINUITY ADDITIVES AND THEIR USE IN POLYMERIZATION PROCESSES - The invention relates to catalyst compositions including at least one catalyst compound and at least one continuity additive such as poly-oxo-metal carboxylate compound and their use in the polymerization of olefins. | 03-31-2011 |
20110098422 | POLYETHYLENE COMPOSITIONS HAVING IMPROVED PROPERTIES - Polyethylene compositions having improved properties are provided. In one aspect, a polyethylene composition having a long chain branching index (g′ | 04-28-2011 |
20110184132 | Catalyst Compositions Comprising Support Materials Having an Improved Particle-Size Distribution - A catalyst composition that includes a support material having an improved particle-size distribution is provided. Processes for producing polyolefin composition also are provided. Polymers and films also are provided. An example of a catalyst composition is a supported multi-transition-metal catalyst composition that includes: (a) at least two catalyst components selected from the group consisting of: a nonmetallocene catalyst component and a metallocene catalyst component; (b) a support material that has a D | 07-28-2011 |
20120252994 | Methods for Making Polyolefin Products Having Different Shear Thinning Properties and Haze - Provided is a method for making a polyolefin comprising contacting one or more olefins in a reactor containing a catalyst; polymerizing the one or more olefins to produce an olefin polymer characterized by a first melt flow ratio (MFR) and a first haze; and altering the reaction temperature in the reactor to shift the first MFR to a MFR that is different than the first MFR and to shift the first haze to a haze that is different than the first haze. | 10-04-2012 |
20130245215 | Catalyst Composition Having Improved Flow Characteristics and Methods of Making and Using the Same - Catalyst compositions for the polymerization of olefins having improved flowability properties are provided. | 09-19-2013 |
20130253153 | Processes for the Polymerization of Olefins with Extracted Metal Carboxylate Salts - Processes for the polymerization of olefins with extracted metal carboxylate salts are provided. The polymerization processes have increased productivity and/or increased resin bulk density. | 09-26-2013 |
20140350199 | Continuity Additive for Polyolefin Polymerization Processes - A polymerization process is disclosed, including: polymerizing an olefin to form an olefin-based polymer in a polymerization reactor; and introducing a hindered amine light stabilizer to the polymerization reactor. The process may further comprise monitoring static in the polymerization reactor; maintaining the static at a desired level by use of a hindered amine light stabilizer, the hindered amine light stabilizer present in the reactor in the range from about 0.1 to about 500 ppmw, based on the weight of polymer produced by the process. | 11-27-2014 |