Patent application number | Description | Published |
20100317904 | OLIGOMERIZATION OF ALPHA OLEFINS USING METALLOCENE-SSA CATALYST SYSTEMS AND USE OF THE RESULTANT POLYALPHAOLEFINS TO PREPARE LUBRICANT BLENDS - This disclosure provides for alpha olefin oligomers and polyalphaolefins (or PAOs) and methods of making the alpha olefin oligomers and PAOs. This disclosure encompasses metallocene-based alpha olefin oligomerization catalyst systems, including those that include at least one metallocene and an activator comprising a solid oxide chemically-treated with an electron withdrawing anion. The alpha olefin oligomers and PAOs prepared with these catalyst systems can have a high viscosity index combined with a low pour point, making them particularly useful in lubricant compositions and as viscosity modifiers. | 12-16-2010 |
20100331505 | DUAL METALLOCENE CATALYST SYSTEMS FOR DECREASING MELT INDEX AND INCREASING POLYMER PRODUCTION RATES - The present invention provides dual catalyst systems and polymerization processes employing these dual catalyst systems. The disclosed polymerization processes can produce olefin polymers at higher production rates, and these olefin polymers may have a higher molecular weight and/or a lower melt index. | 12-30-2010 |
20110082323 | OLIGOMERIZATION OF OLEFIN WAXES USING METALLOCENE-BASED CATALYST SYSTEMS - This disclosure provides for olefin wax oligomer compositions, methods of producing olefin wax oligomer composition, and methods for oligomerizing olefin waxes. This disclosure encompasses metallocene-based olefin wax oligomerization catalyst systems, including those that include a metallocene and an aluminoxane, a metallocene and a solid oxide chemically-treated with an electron withdrawing anion, and a metallocene, a solid oxide chemically-treated with an electron withdrawing anion, and an organoaluminum compound. The olefin wax oligomers prepared with these catalyst systems can decreased needle penetrations, increased viscosity, and an increased drop melt, making them useful as an additive in candles, stone polishes, liquid polishes, and mold release formulations. | 04-07-2011 |
20120077008 | Novel Catalyst Systems and Polymer Resins Having Improved Barrier Properties - A unimodal polymeric resin having a density of from about 0.946 g/ml to about 0.97 g/ml and a zero shear viscosity of from about 8×10 | 03-29-2012 |
20120077665 | Novel Catalyst Systems and Polymer Resins Having Improved Barrier Properties - A catalyst system comprising a half-sandwich chromium complex, an activator support and an optional cocatalyst. A compound of formula Cp′Cr(Cl) | 03-29-2012 |
20120088890 | BRIDGED METALLOCENE CATALYST SYSTEMS WITH SWITCHABLE HYDROGEN AND COMONOMER EFFECTS - The present invention provides polymerization processes utilizing an ansa-metallocene catalyst system for the production of olefin polymers. Polymers produced from the polymerization processes have properties that vary based upon the presence or the absence of hydrogen and/or comonomer in the polymerization process. | 04-12-2012 |
20120190803 | HALF-METALLOCENE COMPOUNDS AND CATALYST COMPOSITIONS - The present invention provides polymerization catalyst compositions employing half-metallocene compounds with a heteroatom-containing ligand bound to the transition metal. Methods for making these hybrid metallocene compounds and for using such compounds in catalyst compositions for the polymerization of olefins also are provided. | 07-26-2012 |
20120214954 | Polymer Compositions for Rotational Molding Applications - A polymer having a density of from about 0.94 g/cm | 08-23-2012 |
20120232229 | CATALYST SYSTEMS CONTAINING A BRIDGED METALLOCENE - The present invention provides polymerization processes utilizing a catalyst system containing an ansa-metallocene and a second metallocene compound for the production of olefin polymers. | 09-13-2012 |
20130079477 | Dual Metallocene Catalyst Systems for Decreasing Melt Index and Increasing Polymer Production Rates - The present invention provides dual catalyst systems and polymerization processes employing these dual catalyst systems. The disclosed polymerization processes can produce olefin polymers at higher production rates, and these olefin polymers may have a higher molecular weight and/or a lower melt index. | 03-28-2013 |
20130085060 | Half-Metallocene Compounds and Catalyst Compositions - The present invention provides polymerization catalyst compositions employing half-metallocene compounds with a heteroatom-containing ligand bound to the transition metal. Methods for making these hybrid metallocene compounds and for using such compounds in catalyst compositions for the polymerization of olefins also are provided. | 04-04-2013 |
20130137836 | Methods for Removing Polymer Skins from Reactor Walls - Methods for removing polymer skins or build-up from reactor walls in polymerization reactor systems containing a loop slurry reactor are disclosed. Such methods can employ removing some or all of the comonomer from the reactor system in combination with increasing the polymerization temperature of the loop slurry reactor. | 05-30-2013 |
20130158216 | Use of Hydrogen and an Organozinc Compound for Polymerization and Polymer Property Control - Methods of controlling polymerization reactions using a synergistic amount of hydrogen and an organozinc compound are disclosed. The resulting polymers have lower molecular weights and higher melt flow indices. | 06-20-2013 |
20130225820 | Novel Catalyst Systems and Polymer Resins Having Improved Barrier Properties - A catalyst system comprising a half-sandwich chromium complex, an activator support and an optional cocatalyst. A compound of formula Cp′Cr(Cl) | 08-29-2013 |
20130245210 | Dual Metallocene Catalyst Systems for Decreasing Melt Index and Increasing Polymer Production Rates - The present invention provides dual catalyst systems and polymerization processes employing these dual catalyst systems. The disclosed polymerization processes can produce olefin polymers at higher production rates, and these olefin polymers may have a higher molecular weight and/or a lower melt index. | 09-19-2013 |
20130289226 | Use of Hydrogen and an Organozinc Compound for Polymerization and Polymer Property Control - Methods of controlling polymerization reactions using a synergistic amount of hydrogen and an organozinc compound are disclosed. The resulting polymers have lower molecular weights and higher melt flow indices. | 10-31-2013 |
20130317265 | Oligomerization of Alpha Olefins Using Metallocene-SSA Catalyst Systems and Use of the Resultant Polyalphaolefins to Prepare Lubricant Blends - This disclosure provides for alpha olefin oligomers and polyalphaolefins (or PAOs) and methods of making the alpha olefin oligomers and PAOs. This disclosure encompasses metallocene-based alpha olefin oligomerization catalyst systems, including those that include at least one metallocene and an activator comprising a solid oxide chemically-treated with an electron withdrawing anion. The alpha olefin oligomers and PAOs prepared with these catalyst systems can have a high viscosity index combined with a low pour point, making them particularly useful in lubricant compositions and as viscosity modifiers. | 11-28-2013 |
20140057777 | Catalyst Systems Containing a Bridged Metallocene - The present invention provides polymerization processes utilizing a catalyst system containing an ansa-metallocene and a second metallocene compound for the production of olefin polymers. | 02-27-2014 |
20140107301 | Bridged Metallocene Catalyst Systems With Switchable Hydrogen and Comonomer Effects - The present invention provides polymerization processes utilizing an ansa-metallocene catalyst system for the production of olefin polymers. Polymers produced from the polymerization processes have properties that vary based upon the presence or the absence of hydrogen and/or comonomer in the polymerization process. | 04-17-2014 |
20140114039 | SYSTEM AND METHOD FOR CATALYST PREPARATION - Techniques are provided for catalyst preparation. A system for catalyst preparation may include an agitator disposed inside a polymerization catalyst tank and configured to mix a polymerization catalyst and a solvent to generate a polymerization catalyst solution. The system may also include a heating system coupled to the polymerization catalyst tank and configured to maintain a temperature of the polymerization catalyst solution above a threshold. The system may also include a precontactor configured to receive feed streams comprising an activator and the polymerization catalyst solution from the polymerization catalyst tank to generate a catalyst complex. The system may also include a transfer line configured to transfer the catalyst complex from an outlet of the precontactor to a reactor. | 04-24-2014 |
20140128563 | Low Density Polyolefin Resins and Films Made Therefrom - Disclosed herein are broad molecular weight distribution olefin polymers having densities in the 0.895 to 0.930 g/cm | 05-08-2014 |
20140235804 | Dual Metallocene Catalyst Systems for Decreasing Melt Index and Increasing Polymer Production Rates - The present invention provides dual catalyst systems and polymerization processes employing these dual catalyst systems. The disclosed polymerization processes can produce olefin polymers at higher production rates, and these olefin polymers may have a higher molecular weight and/or a lower melt index. | 08-21-2014 |
20140243491 | Half-Metallocene Compounds and Catalyst Compositions - The present invention provides polymerization catalyst compositions employing half-metallocene compounds with a heteroatom-containing ligand bound to the transition metal. Methods for making these hybrid metallocene compounds and for using such compounds in catalyst compositions for the polymerization of olefins also are provided. | 08-28-2014 |
20140256899 | Polymer Films Having Improved Heat Sealing Properties - A polymer composition comprising an ethylene alpha-olefin copolymer, wherein the polymer composition is characterized as having (a) a density in the range of from greater than about 0.910 g/cc to about 0.930 g/cc, as determined according to ASTM D1505; (b) a melt index in the range of from greater than about 0.5 g/10 min to about 3 g/10 min, as determined by ASTM D1238, Condition 190° C./2.16 kg; (c) a molecular weight distribution of from about 3.4 to about 12, as determined by gel permeation chromatography (GPC); (d) a weight average molecular weight of from greater than about 85 kg/mol to about 160 kg/mol, as determined by gel permeation chromatography (GPC); and (e) a z-average molecular weight of from greater than about 210 kg/mol to about 500 kg/mol, as determined by gel permeation chromatography (GPC). | 09-11-2014 |
20140336345 | SYSTEM AND METHOD FOR CATALYST PREPARATION - Techniques are provided for catalyst preparation. A system for catalyst preparation may include an agitator disposed inside a polymerization catalyst tank and configured to mix a polymerization catalyst and a solvent to generate a polymerization catalyst solution. The system may also include a heating system coupled to the polymerization catalyst tank and configured to maintain a temperature of the polymerization catalyst solution above a threshold. The system may also include a precontactor configured to receive feed streams comprising an activator and the polymerization catalyst solution from the polymerization catalyst tank to generate a catalyst complex. The system may also include a transfer line configured to transfer the catalyst complex from an outlet of the precontactor to a reactor. | 11-13-2014 |
20150045521 | Methods for Controlling Dual Catalyst Olefin Polymerizations With An Alcohol Compound - Methods for controlling properties of an olefin polymer using an alcohol compound are disclosed. The MI and the HLMI of the polymer can be decreased, and the Mw and the Mz of the polymer can be increased, via the addition of the alcohol compound. | 02-12-2015 |
20150087793 | SYSTEM AND METHOD FOR DETERRING FOULING IN A POLYMERIZATION REACTOR - A catalyst composition may include a precontacted mixture of an olefin polymerization catalyst and an agent including an ammonium salt. The catalyst activity of the catalyst composition in the presence of water may be greater than if no ammonium salt were present in the catalyst composition. The ammonium salt may include a tetraalkylammonium salt, and the olefin polymerization catalyst may include a metallocene compound. | 03-26-2015 |