| Patent Number |
Title Of Patent |
Date Issued |
| RE31443 |
Treatment of silica |
November 15, 1983 |
| A silica-containing composition suitable for supporting chromium to produce a catalyst capable of giving high melt flow olefin polymers for such applications as injection molding and the like requiring a narrow molecular weight distribution, is produced by treating a silica-containing |
| RE31390 |
Treatment of silica |
September 20, 1983 |
| A silica-containing composition suitable for supporting chromium to produce a catalyst capable of giving high melt flow olefin polymers for such applications as injection molding and the like requiring a narrow molecular weight distribution, is produced by treating a silica-containing |
| 7417097 |
Organometal compound catalyst |
August 26, 2008 |
| This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said catalyst composition c |
| 7390764 |
Organometal catalyst compositions |
June 24, 2008 |
| This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said catalyst composition co |
| 7312283 |
Polymerization catalysts and process for producing bimodal polymers in a single reactor |
December 25, 2007 |
| Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. Methods for preparing and using such catalysts to produce polyolefins are also provided. The compositions and methods discl |
| 7307133 |
Polymers having broad molecular weight distributions and methods of making the same |
December 11, 2007 |
| Methods of polymerizing at least one olefin include contacting the olefin with a catalyst comprising chromium and with a cocatalyst comprising a non-transition metal cyclopentadienyl (Cp) compound. The polymerization may be performed in the presence of hydrogen. Using the cocatalyst in |
| 7294599 |
Acidic activator-supports and catalysts for olefin polymerization |
November 13, 2007 |
| This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, typically using a supported catalyst composition. In one aspect, this invention encompasses precontacting a metallocene with an olefin o |
| 7271124 |
Process to produce polymers |
September 18, 2007 |
| A process to produce ethylene polymers is provided. |
| 7247594 |
Catalysts for olefin polymerization |
July 24, 2007 |
| This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, including polymerization methods using a catalyst composition. One aspect of this invention is the formation and use of a catalyst c |
| 7230128 |
Organometallic fluorenyl compounds, preparations, and use |
June 12, 2007 |
| Fluorenyl-containing metallocenes are disclosed along with methods for making the metallocenes. Also disclosed are methods for using the metallocenes as polymerization catalysts. In addition, polymers resulting from such polymerizations are disclosed. |
| 7214642 |
Methods of preparing active chromium/alumina catalysts via treatment with sulfate |
May 8, 2007 |
| Methods of preparing a polymerization catalyst are provided that include contacting a support comprising alumina with a sulfating agent and with chromium. In an embodiment in which the chromium is provided from a chromium compound such as chromium oxide, the support may be calcined a |
| 7208441 |
Polymerization catalyst systems and processes therefor and therewith |
April 24, 2007 |
| A copolymer of ethylene and a higher alpha olefin, preferably 1-hexene, can be produced using an activated chromium containing catalyst system and a cocatalyst selected from the group consisting of trialkylboron, trialkylsiloxyalutninum, and a combination of trialkylboron and thalkyl |
| 7199073 |
Resins that yield low haze films and the process for their production |
April 3, 2007 |
| Catalyst compositions comprising a first metallocene compound, a second metallocene compound, a third metallocene compound, a chemically-treated solid oxide, and an organoaluminum compound are provided. Methods for preparing and using the catalyst and polyolefins are also provided. The |
| 7163906 |
Organochromium/metallocene combination catalysts for producing bimodal resins |
January 16, 2007 |
| This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, including polymerization methods using a supported catalyst composition. In one aspect, the present invention encompasses a catalyst |
| 7148298 |
Polymerization catalysts for producing polymers with low levels of long chain branching |
December 12, 2006 |
| This invention relates to catalyst compositions, methods, and polymers encompassing a Group 4 metallocene with bridging .eta..sup.5-cyclopentadienyl-type ligands, in combination with a cocatalyst and an activator-support. The compositions and methods disclosed herein provide ethylene |
| 7119153 |
Dual metallocene catalyst for producing film resins with good machine direction (MD) elmendorf t |
October 10, 2006 |
| This invention relates to catalyst compositions comprising a first metallocene compound, a second metallocene compound, at least one chemically-treated solid oxide, and at least one organoaluminum compound. This invention also relates to methods to prepare and use the catalyst compos |
| 7119043 |
Olefin polymerization processes and products thereof |
October 10, 2006 |
| A novel loop/slurry olefin polymerization process is provided which produces ultra high molecular weight ethylene homopolymers and ultra high molecular weight ethylene copolymers. Catalyst systems used are selected from the group consisting of inorganic oxide supported titanium-conta |
| 7112643 |
Polymers having low levels of long chain branching and methods of making the same |
September 26, 2006 |
| Methods of producing a polymer include contacting at least one olefin with a catalyst prepared by contacting a support comprising alumina with a sulfating agent and with chromium. Polymer compositions produced in this manner may exhibit relatively low levels of long chain branching and |
| 7109277 |
Polymerization catalysts |
September 19, 2006 |
| A process to produce a polymer is provided. The process comprising contacting a treated solid oxide compound, an organometal compound, and an organoaluminum compound in the presence of an alpha olefin under polymerization conditions to produce the polymer. |
| 7094857 |
Ethylene polymers and copolymers with high optical opacity |
August 22, 2006 |
| This invention relates to the field of metal-catalyzed olefin polymerization methods and the polymers and films prepared therefrom. In one aspect, this invention provides polyethylene and ethylene/.alpha.-olefin copolymers formed in the presence of tightly-bridged metallocene catalys |
| 7071276 |
Process to produce polymers |
July 4, 2006 |
| A process to produce ethylene polymers is provided. |
| 7041753 |
Organometal catalyst compositions |
May 9, 2006 |
| This invention provides oxide matrix compositions that can be utilized in catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. The oxide matrix composition comprises residual mineral components and an oxide precursor. The catalyst composit |
| 7041617 |
Catalyst compositions and polyolefins for extrusion coating applications |
May 9, 2006 |
| This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, including polymerization methods using a supported catalyst composition. In one aspect, the present invention encompasses a catalyst |
| 7026494 |
Polymerization catalysts for producing high melt index polymers without the use of hydrogen |
April 11, 2006 |
| Various catalyst compositions including the contact product of at least one ansa-metallocene compound, at least one organoaluminum compound, and at least one activator-support are disclosed. Processes for forming such compositions and for forming polyolefins with such compositions are al |
| 7022781 |
Polymerization catalyst systems and processes using alkyl lithium compounds as a cocatalyst |
April 4, 2006 |
| A catalyst system composition comprising a chromium compound supported on a silica-titania support, wherein said catalyst system has been reduced with carbon monoxide, and a cocatalyst selected from the group consisting of i) alkyl lithium compounds, ii) dialkyl aluminum alkoxides in |
| 7001968 |
Olefin polymerization processes and products thereof |
February 21, 2006 |
| A novel loop/slurry olefin polymerization process is provided which produces ultra-high molecular weight ethylene homopolymer. |
| 6992032 |
Organometal catalyst compositions |
January 31, 2006 |
| This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said catalyst composition c |
| 6984603 |
Organometal catalyst compositions |
January 10, 2006 |
| This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said catalyst composition c |
| 6982306 |
Stannoxy-substituted metallocene catalysts for olefin and acetylene polymerization |
January 3, 2006 |
| This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, including polymerization methods using a catalyst composition. One aspect of this invention is the formation and use of a catalyst c |
| 6977235 |
Catalyst systems comprising a calcined chromium catalyst and a non-transition metal cyclopentadi |
December 20, 2005 |
| According to an embodiment, catalyst systems for polymerizing olefins include a catalyst comprising chromium and a cocatalyst comprising a substituted or unsubstituted non-transition metal cyclopentadienyl compound (Cp). The catalyst also comprises an inorganic oxide support. In an e |
| 6936667 |
Polymerization catalyst compositions and processes to produce polymers and bimodal polymers |
August 30, 2005 |
| A process to produce a first catalyst composition is provided. The process comprises contacting at least one first organometal compound and at least one activator to produce the first catalyst composition. The activator is selected from the group consisting of aluminoxanes, fluoro-organo |
| 6900277 |
Effect of aluminophosphate on catalyst systems comprising metal alkyl cocatalysts |
May 31, 2005 |
| Novel catalyst systems which comprise one or more diimine nickel(II) or palladium (II) complexes, one or more cocatalysts, and aluminophosphate are disclosed. Olefin polymerization processes using those catalyst systems are also disclosed. The inclusion of aluminophosphate can improve |
| 6887819 |
Compositions that can produce polymers |
May 3, 2005 |
| This invention provides compositions that are useful for polymerizing at least one monomer into at least one polymer. |
| 6878785 |
Organometal compound catalyst |
April 12, 2005 |
| This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said catalyst composition c |
| 6875835 |
Polymerization catalyst systems and processes therefor and therewith |
April 5, 2005 |
| A copolymer of ethylene and a higher alpha olefin, preferably 1-hexene, can be produced using an activated chromium containing catalyst system and a cocatalyst selected from the group consisting of trialkylboron, trialkylsiloxyalutninum, and a combination of trialkylboron and thalkyl |
| 6867278 |
Olefin polymers, method of making, and use thereof |
March 15, 2005 |
| The present invention is directed to homo-polymers and copolymers of mono-1-olefins, a method of making such polymers,and uses of such polymers. Polymers of the present invention are formed by contacting at least one mono-1-olefin having from 2 to about 20 carbon atoms per molecule a |
| 6858687 |
Organometal catalyst compositions |
February 22, 2005 |
| This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said catalyst composition c |
| 6855781 |
Process to produce polymers |
February 15, 2005 |
| A process to produce ethylene polymers is provided. Particularly, a process to produce ethylene polymers having a broad molecular weight distribution is provided. More particularly, a process to produce ethylene polymers that have low formation of smoke and odor during blow molding is pr |
| 6838533 |
Organometal catalyst composition |
January 4, 2005 |
| This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said catalyst composition c |
| 6833338 |
Organometal compound catalyst |
December 21, 2004 |
| This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said catalyst composition c |
| 6831141 |
Process for producing polymers |
December 14, 2004 |
| A process of using a catalyst composition to polymerize at least one monomer to produce a polymer. The process comprises contacting the catalyst composition and at least one monomer in a polymerization zone under polymerization conditions to produce the polymer. The catalyst composit |
| 6828268 |
Polymerization catalyst systems and processes using alkyl lithium compounds as a cocatalyst |
December 7, 2004 |
| A catalyst system composition comprising a chromium compound supported on a silica-titania support, wherein said catalyst system has been reduced with carbon monoxide, and a cocatalyst selected from the group consisting of i) alkyl lithium compounds, ii) dialkyl aluminum alkoxides in com |
| 6750302 |
Organometal catalyst compositions |
June 15, 2004 |
| A polymerization catalyst is disclosed, wherein the catalyst comprises: (a) a metallocene of Ti, Zr or Hf, (b) an organoaluminum compound, and (c) a treated solid oxide support which comprises fluorine and chromium. |
| 6716938 |
Polymerization catalyst systems, methods of making and uses therefor |
April 6, 2004 |
| A novel magnesium treated silica-containing compound that is useful as a support for chromium based olefin polymerization catalyst systems is provided which produces ethylene polymers having with MWD's that promote good properties particularly in HMW film applications. |
| 6713572 |
Ethylene copolymerization process |
March 30, 2004 |
| A process as disclosed for producing a low density polyethylene using a particle form polymerization process and a titanium-containing catalyst wherein the ratio of comonomer to ethylene is at least about 1:1 and the titanium-containing catalyst is a special catalyst which has been p |
| 6667274 |
Polymerization catalysts |
December 23, 2003 |
| A process to produce a polymer is provided. The process comprising contacting a treated solid oxide compound, an organometal compound, and an organoaluminum compound in the presence of an alpha olefin under polymerization conditions to produce the polymer. |
| 6657034 |
Olefin polymerization processes and products thereof |
December 2, 2003 |
| A novel loop/slurry olefin polymerization process is provided which produces ultra high molecular weight ethylene homopolymers and ultra high molecular weight ethylene copolymers. Catalyst systems used are selected from the group consisting of inorganic oxide supported titanium-containin |
| 6657023 |
Polymerization process |
December 2, 2003 |
| Polymerization processes for ethylene and at least one mono-1-olefin comonomer having from about three to eight carbon atoms per molecule in the presence of a twice-aged catalyst system comprising chromium supported on a silica-titania support and a trialkylboron compound is provided. |
| 6653416 |
Polymerization process utilizing organometal catalyst compositions and the polymer produced ther |
November 25, 2003 |
| This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said catalyst composition c |
| 6642324 |
Process that produces polymers |
November 4, 2003 |
| A process comprising polymerizing ethylene, or polymerizing ethylene and at least one other olefin, to produce a polymer is provided. |
