Patent application number | Description | Published |
20120041147 | Method of controlling polymer architecture - Carbon dioxide is used to control the ratio of polymer components in a polyethylene composition made using a combination catalyst comprising a chromium catalyst, a single site catalyst and one or more activators. | 02-16-2012 |
20120142989 | HEAT MANAGEMENT IN ETHYLENE OLIGOMERIZATION - The oligomerization of ethylene using a chromium catalyst having a heteroatomic ligand may be used to provide oligomerization products that are selective towards hexene and/or octene. However, such processes also typically produce some polymer as an undesirable by product. The present invention is directed towards improvements in the selective oligomerization of ethylene. | 06-07-2012 |
20120203472 | Double derivative NIR process control - The present invention provides a method to calibrate a NIR analyzer to measure monomer concentrations at one or more locations in a reactor system. The regression coefficients for the NIR analyzer are transferable between reactors using the same process (solution polymerization to solution polymerization) and may be used to control the reaction, or calibrate flow meters on line. | 08-09-2012 |
20130022498 | Roller detection - In the high pressure of polymerization of ethylene homopolymer or copolymers conditions in the reactor may become unstable leading to the decomposition (“decomp”) of the reaction mixture. Monitoring temperature excursions traveling through the reactor over close thermocouples (a roller) to detect changes in the mean temperature and the moving temperature front for a group of thermocouples detects conditions potentially leading to a decomp. | 01-24-2013 |
20130072632 | POLYETHYLENE COMPOSITIONS AND CLOSURES FOR BOTTLES - A dual reactor solution process gives high density polyethylene compositions containing a first ethylene copolymer and a second ethylene copolymer and which have good processability, toughness, and environmental stress crack resistance combined with good organoleptic properties. The polyethylene compositions are suitable for compression molding or injection molding applications and are particularly useful in the manufacture of caps and closures for bottles. | 03-21-2013 |
20130310532 | Rotomolding Resin - Resins suitable for rotomolded articles comprise a bimodal polyethylene copolymer comprising from 0.1 to 5 weight % of one or more C | 11-21-2013 |
20140024789 | ADJUSTING POLYMER COMPOSITION - A scavenger is used to indirectly control the ratio of polymer components in a polyethylene composition made using a combination catalyst comprising an inorganic chromium catalyst, and a group 4 single site catalyst. | 01-23-2014 |
20140171582 | POLYETHYLENE COMPOSITIONS HAVING HIGH DIMENSIONAL STABILITY AND EXCELLENT PROCESSABILITY FOR CAPS AND CLOSURES - A dual reactor solution polymerization process gives high density polyethylene compositions containing a first ethylene copolymer and a second ethylene copolymer and which have high dimensional stability, excellent processability as well as good organoleptic properties and reasonable stress cracking resistance. The polyethylene compositions are suitable for compression molding or injection molding applications and are useful, for example, in the manufacture of caps and closures for bottles, and for example, in bottles containing non-pressurized liquids. | 06-19-2014 |
20140363599 | Adjusting Polymer Composition - A scavenger is used to indirectly control the ratio of polymer components in a polyethylene composition made using a combination catalyst comprising an inorganic chromium catalyst, and a group 4 single site catalyst. | 12-11-2014 |
20150065657 | ROTOMOLDING RESIN - Resins suitable for rotomolded articles comprise a bimodal polyethylene copolymer comprising from 0.1 to 5 weight % of one or more C | 03-05-2015 |