| Patent Number |
Title Of Patent |
Date Issued |
| 7410926 |
Polymerization process using a supported, treated catalyst system |
August 12, 2008 |
| The present invention relates to a supported, treated catalyst system and its use in a process for polymerizing olefin(s). More particularly, it provides a supported, treated catalyst system produced by a process comprising the steps of: (a) forming a supported bimetallic catalyst sy |
| 7381783 |
Polymerization catalyst systems, their use, their products and articles thereof |
June 3, 2008 |
| The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The invention is also dir |
| 7348383 |
Spray-dried, mixed metal ziegler catalyst compositions |
March 25, 2008 |
| A Ziegler-Natta catalyst composition comprising a solid mixture formed by halogenation of: Al) a spray-dried catalyst precursor comprising the reaction product of a magnesium compound, a non-metallocene titanium compound, and at least one non-metallocene compound of a transition metal |
| 7323526 |
Supported metallocene-alkyl catalyst composition |
January 29, 2008 |
| A supported catalyst composition having improved flow properties is disclosed comprising an alkylalumoxane, a metallocene-alkyl an inorganic oxide support having an average particle size of from 0.1 to 50 .mu.m and calcined at a temperature greater than 600.degree. C., and optionally an |
| 7220804 |
Method for preparing a catalyst system and its use in a polymerization process |
May 22, 2007 |
| The present invention relates to a supported catalyst composition and a method for making the supported catalyst composition and its use in a process for polymerizing olefin(s). In particular, the invention is directed to a method for making a supported catalyst composition by contac |
| 7172987 |
Bimetallic catalyst, method of polymerization and bimodal polyolefins therefrom |
February 6, 2007 |
| Bimetallic catalysts, and methods of producing a bimetallic catalyst comprising a modified Ziegler-Natta catalyst and a metallocene are provided, in one embodiment the method including combining: (a) a Ziegler-Natta catalyst comprising a Group 4, 5 or 6 metal halide and/or oxide, opt |
| 7141632 |
Mixed metallocene catalyst systems containing a poor comonomer incorporator and a good comonomer |
November 28, 2006 |
| The present invention provides polymerization catalyst compounds, catalyst systems including these catalyst compounds, and to their use in the polymerization of ethylene and at least one comonomer. In particular, the invention provides a catalyst system comprising a poor comonomer in |
| 6956094 |
Bimodal polyolefin |
October 18, 2005 |
| The invention provides for polymerization catalyst compositions, and for methods for introducing the catalyst compositions into a polymerization reactor. More particularly, the method combines a catalyst component containing slurry and a catalyst component containing solution to form the |
| 6956089 |
Polymerization process |
October 18, 2005 |
| The invention provides for polymerization catalyst compositions, and for methods for introducing the catalyst compositions into a polymerization reactor. More particularly, the method combines a catalyst component containing slurry and a catalyst component containing solution to form the |
| 6852659 |
Method for preparing a catalyst composition and its use in a polymerization process |
February 8, 2005 |
| The present invention relates to a catalyst composition of a supported activator, a catalyst compound and an ionizing activator and its use in a process for polymerizing olefin(s). The invention is also directed to a method for making the catalyst composition above. |
| 6846886 |
Polymerization process |
January 25, 2005 |
| The invention provides for polymerization catalyst compositions, and for methods for introducing the catalyst compositions into a polymerization reactor. More particularly, the method combines a catalyst component containing slurry and a catalyst component containing solution to form the |
| 6828394 |
Mixed metallocene catalyst systems containing a poor comonomer incorporator and a good comonomer |
December 7, 2004 |
| The present invention provides polymerization catalyst compounds, catalyst systems including these catalyst compounds, and to their use in the polymerization of ethylene and at least one comonomer. In particular, the invention provides a catalyst system comprising a poor comonomer in |
| 6825287 |
Polymerization process |
November 30, 2004 |
| The invention provides for polymerization catalyst compositions, and for methods for introducing the catalyst compositions into a polymerization reactor. More particularly, the method combines a catalyst component containing slurry and a catalyst component containing solution to form the |
| 6689847 |
Polymerization process |
February 10, 2004 |
| The invention provides for polymerization catalyst compositions, and for methods for introducing the catalyst compositions into a polymerization reactor. More particularly, the method combines a catalyst component containing slurry and a catalyst component containing solution to form the |
| 6608149 |
Polymerization process |
August 19, 2003 |
| The invention provides for polymerization catalyst compositions, and for methods for introducing the catalyst compositions into a polymerization reactor. More particularly, the method combines a catalyst component containing slurry and a catalyst component containing solution to form the |
| 6605675 |
Polymerization process |
August 12, 2003 |
| The invention provides for polymerization catalyst compositions, and for methods for introducing the catalyst compositions into a polymerization reactor. More particularly, the method combines a catalyst component containing slurry and a catalyst component containing solution to form the |
| 6605563 |
Catalyst system and its use in olefin polymerization |
August 12, 2003 |
| A polymerization catalyst system and a method for preparing the catalyst system is disclosed. The catalyst system includes a bulky ligand metallocene catalyst compound, preferably containing a single cyclopentadienyl or substituted cyclopentadienyl-type ring system, a Group 13 elemen |
| 6552137 |
Catalyst system and its use in olefin polymerization |
April 22, 2003 |
| A polymerization catalyst system and a method for preparing the catalyst system is disclosed. The catalyst system includes a bulky ligand metallocene catalyst compound, preferably containing a single cyclopentadienyl or substituted cyclopentadienyl-type ring system, a Group 13 elemen |
| 6528597 |
Polymerization catalyst systems, their use, their products and articles thereof |
March 4, 2003 |
| The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The invention is also dir |
| 6281320 |
Use of chelatable phenols with metallocene- aluminoxane catalyst systems |
August 28, 2001 |
| This invention comprises a metallocene catalyst system for the production of high molecular weight polyolefins, particularly polyethylene and higher poly-alpha olefins, and copolymers of ethylene and/or alpha olefins with other unsaturated monomers, including diolefins, acetylenically |
| 6248845 |
Polymerization catalyst systems comprising substituted hafnocenes |
June 19, 2001 |
| The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The invention is also dir |
| 6242545 |
Polymerization catalyst systems comprising substituted hafinocenes |
June 5, 2001 |
| The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The hafnocene comprises a |
| 6136747 |
Mixed catalyst composition for the production of olefin polymers |
October 24, 2000 |
| A mixed catalyst composition comprising a) a solid Ziegler-Natta catalyst; b) a liquid single site catalyst; and c) at least one activating cocatalyst is provided. Polymers having a broad or bimodal molecular weight distribution may be made with this catalyst composition. |
| 6069213 |
Mixed catalyst system |
May 30, 2000 |
| It has been found that the use of at least one unsupported metallocene polymerization catalyst with at least one supported metallocene polymerization catalyst in the polymerization of olefins allows for better control of the polymerization, especially gas phase polymerization. Such a |
| 6069109 |
Process for the production of half-sandwich transition metal based catalyst precursors |
May 30, 2000 |
| A process for the production of a catalyst precursor comprising reacting (a) a metallocene dihalide; (b) a compound of the formula: ##STR1## wherein each Q is the same or different and is independently selected from the group consisting of O, NR, CR.sub.2, and S; E is either C or S; |
| 6028151 |
Catalyst composition having improved comonomer reactivity |
February 22, 2000 |
| A process for producing an olefin polymer, which comprises contacting at least two olefin monomers under polymerization conditions with a catalyst composition comprising A) an aluminoxane-impregnated support prepared by contacting an aluminoxane with an inert carrier material and heating |
| 5756416 |
Catalyst composition having improved comonomer reactivity |
May 26, 1998 |
| A catalyst composition comprising A) an aluminoxane-impregnated support prepared by contacting an aluminoxane with an inert carrier material and heating to a temperature of at least about 80.degree. C.; B) a metallocene of the formula:wherein M is a metal from groups IIIB to VIII of the |
| 5317036 |
Gas phase polymerization reactions utilizing soluble unsupported catalysts |
May 31, 1994 |
| Gas phase polymerization processes are disclosed which utilize unsupported soluble transition metal coordination catalysts. The catalysts are introduced into the reactor as a solution. |
| 5288933 |
Process for the production of polyethylene |
February 22, 1994 |
| A process for the polymerization of ethylene or a mixture comprising ethylene and one or more alpha-olefins and, optionally, a diene, comprising passing, under polymerization conditions, the aforementioned monomer(s) into contact with a catalyst system comprising:(a) the reaction product |
| 5200502 |
Deactivator reagent for olefin polymerization catalysts |
April 6, 1993 |
| A method is disclosed for controlling the activity of or deactivating a transition element olefin polymerization catalyst by contacting the catalyst with a 1,2-diether organic compound. |
| 5162466 |
Use of methylene-bridged derivatives of cyclopentadienyl dicarbollide complexes of titanium, zir |
November 10, 1992 |
| Methylene bridged derivatives of novel cyclopentadienyl dicarbollide complexes of titanium, zirconium and hafnium display high activity as ethylene polymerization catalysts in the absence of a cocatalyst. |
| 5034366 |
High activity vanadium-based catalyst |
July 23, 1991 |
| A vanadium-based catalyst is treated with a polysiloxane oil as a means of enhancing catalyst activity and polymer productivity. |
| 5030605 |
Catalyst for regulating the molecular weight distribution of ethylene polymers |
July 9, 1991 |
| A vanadium-based catalyst is treated with certain alkylaluminum alkoxide compounds as a means of narrowing and effectively regulating the molecular weight distribution of the polymers produced with the catalyst. |
| 4999327 |
Catalyst for regulating the molecular weight distribution of ethylene polymers |
March 12, 1991 |
| A vanadium-based catalyst is treated with certain silicon-containing compounds as a means of narrowing and effectively regulating the molecular weight distribution of the polymers produced with the catalyst. |
| 4988784 |
Catalyst for regulating the molecular weight distribution of ethylene polymers |
January 29, 1991 |
| A vanadium-based catalyst is treated with certain phosphorus-containing compounds as a means of narrowing and effectively regulating the molecular weight distribution of the polymers produced with the catalyst. |
| 4923938 |
Catalyst for regulating the molecular weight distribution of ethylene polymers |
May 8, 1990 |
| A vanadium-based catalyst is treated with certain oxygen-containing compounds as a means of narrowing and effectively regulating the molecular weight distribution of the polymers produced with the catalyst. |
| 4886771 |
Catalyst for regulating the molecular weight distribution of ethylene polymers |
December 12, 1989 |
| A vanadium-based catalyst is treated with certain phosphorus-containing compounds as a means of narrowing and effectively regulating the molecular weight distribution of the polymers produced with the catalyst. |
| 4845067 |
Catalyst for regulating the molecular weight distribution of ethylene polymers |
July 4, 1989 |
| A vanadium-based catalyst is treated with certain oxygen-containing compounds as a means of narrowing and effectively regulating the molecular weight distribution of the polymers produced with the catalyst. |
