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| Number | Title | Issue Date |
| 6403516 | Process for preparing chromium phyllosilicate clay catalysts A process for preparing pillared chromium phyllosilicate clay -olefin catalysts is disclosed. This process utilizes palygorskite and sepiolite clays. The pillaring of said clays comprise the steps of: (a) preparing a hydrolyzed first solution by di... | 06/11/2002 |
| 6403734 | Organometallic fluorenyl compounds, preparation, and use Bridged fluorenyl-containing metallocenes of metals of Groups 4-6 and their use in forming homopolymers of alpha olefins or polymers of ethylene and optionally minor amounts of alpha olefins, wherein in each case at least one of the cyclic groups of the b... | 06/11/2002 |
| 6384161 | Method and catalyst system for producing polyolefins with broadened molecular weight distributions The present invention provides a process for preparing a supported metallocene catalyst system that can be used to catalyze formation of polyolefins having a wide molecular weight range. In accordance with the process of the present invention, a first por... | 05/07/2002 |
| 6372930 | Polymeric ligands, polymeric metallocenes, catalyst systems, preparation, and use Polymeric ligands, polymeric metallocenes, and processes for preparing same are provided. The process for preparing polymeric metallocenes comprises reacting a polymeric ligand, a transition metal compound, and an alkali metal compound. In one embodiment,... | 04/16/2002 |
| 6355359 | Polyethylene film A self supporting film having one or more layers wherein at least one layer has a percent haze of less than 17.8 and the polymer of that layer consists essentially of a polyethylene having a density of at least 0.925 grams per cc, a molecular weight distr... | 03/12/2002 |
| 6353071 | Processes to produce organo-aluminoxane compositions Processes are provided that produce organo-aluminoxane compositions. Said processes comprise: desiccating a first mixture, where said first mixture comprises organo-aluminoxane molecules intermixed with a solvent, to produce a first composition, where sai... | 03/05/2002 |
| 6340651 | Multicyclic metallocycle metallocenes and their use A process for producing a metallocycle metallocene comprising reacting a reactant metallocene which has a cyclopentadienyl group having an alkenyl group attached which has at least 3 carbon atoms with about 2 molar equivalents of an alkali metal alkyl hav... | 01/22/2002 |
| 6339035 | Catalyst and process for polymerizing olefins A catalyst system comprising the product resulting from the combination of a metallocene having a monoorganoamide radical attached to the metal of the metallocene and a cocatalyst having alkylaluminum groups and the use of such catalyst systems in the pol... | 01/15/2002 |
| 6329541 | Organo omega-alkenyl cyclopentacarbyl silane-bridged metallocene compounds An (organo) ((omega-alkenyl) cyclopentacarbyl) (silane-bridged) metallocene compound is provided. Polymerization processes therewith are also provided.... | 12/11/2001 |
| 6329476 | Olefin polymerization processes and products thereof 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 o... | 12/11/2001 |
| 6329312 | Metallocycle metallocenes and their use Metallocycle metallocenes are produced by reacting a first metallocene having an aralkyl group or an aryl dialkyl silyl group attached to a cyclodienyl group with about two molar equivalents of an alkali metal alkyl having at least 4 carbon atoms. The use... | 12/11/2001 |
| 6294494 | Olefin polymerization processes and products thereof A novel loop/slurry olefin polymerization process is provided which produces ultra-high molecular weight ethylene homopolymer.... | 09/25/2001 |
| 6291382 | Metallocenes, polymerization catalyst systems, their preparation, and use Metallocenes having a 9-fluorenyl group and another cyclic dienyl group connected by a single carbon having a terminally unsaturated hydrocarbyl substituent wherein the 9-fluorenyl group has a hydrocarbyl substituent in the 4 position, olefin polymerizati... | 09/18/2001 |
| 6291608 | Polymerization catalyst system and polymerization process A process is provided to prepare polyolefins having a multimodal molecular weight distribution comprising contacting at least one mono-1-olefin in a polymerization zone, under polymerization conditions, with a dual catalyst system comprising a first catal... | 09/18/2001 |
| 6274675 | Process to produce a multicomponent ethylene polymer composition A process to produce a multicomponent ethylene polymer composition is provided. This process comprises: (a) contacting an organic peroxide with at least one post consumer ethylene polymer resin that has a density from about 0.95 to 0.97 grams per cubic ce... | 08/14/2001 |
| 6268453 | Polymerization catalyst systems, their preparation, and use A solid cocatalyst is prepared by reacting a suitable support base with an organoaluminum compound and then reacting that product with an activity promoting amount of water. The solid cocatalyst can be combined with a polymerization catalyst to form a cat... | 07/31/2001 |
| 6262201 | Aryl substituted metallocene catalysts and their use Substituted metallocenes which have a substituent selected from the group consisting of aryl alkyl, aryl alkyl silyl, and aryl silyl groups, catalyst systems resulting from the combination of such metallocenes and a cocatalyst, and for producing olefins u... | 07/17/2001 |
| 6248840 | Process to produce a composition A process comprising reacting at least one polymer component, with at least one reactive component, to produce a composition, the polymer being a metallocene polymerized ethylene (co)polymer, and the reactive component being a crosslinking agent.... | 06/19/2001 |
| 6239060 | Supported metallocene catalyst system and method for polymerizing olefins The present invention provides a new type of supported metallocene catalyst system. In one aspect of the invention, an inorganic oxide support, such as silica, is impregnated with a Group XIII element such as B, Al or GA. The support is then contacted wit... | 05/29/2001 |
| 6239300 | Metallocene production process A number of process steps are provided that can be combined to produce bridged cyclopentadienyl-fluorenyl metallocenes. The process steps include production of a cyclopentadiene compound from dicyclopentadiene; production and recovery of a fulvene compoun... | 05/29/2001 |
| 6232415 | Process to produce a monovinylaromatic/ monoolefin polymer and said monovinylaromatic/monoolefin polymer A process to produce a monovinylaromatic/monoolefin polymer is provided. Said monovinylaromatic/monoolefin polymer is provided.... | 05/15/2001 |
| 6232414 | Process to make a monovinylaromatic polymer and said monovinylaromatic polymer A process to produce a monovinylaromatic polymer is provided. Said monovinylaromatic polymer is provided.... | 05/15/2001 |
| 6221981 | Method for making and using a supported metallcene catalyst system Methods are disclosed for preparing a highly active solid metallocene-containing catalyst system and its use in the polymerization of olefins. The catalyst system is prepared by creating a catalyst system solution by combining an aluminoxane with a metall... | 04/24/2001 |
| 6214469 | Films comprising metallocene catalyzed polyethylene A high clarity film containing three layers wherein the polymer of each outer layer is the same or different polyethylene selected from polyethylenes having a density of at least 0.925 g/cc, and a molecular weight distribution of less than 4, and being fu... | 04/10/2001 |
| 6197899 | Olefin polymerization A process is disclosed for the particle form polymerization of olefins. The process employs a titanium-containing having hydrocarbon soluble titanium components. The resulting catalyst is pretreated with an organometallic reducing agent prior to the intro... | 03/06/2001 |
| 6187880 | Process for producing an olefin polymer using a metallocene Metallocene having two cyclic dienyl groups connected by a single carbon having an aryl substituent and a terminally unsaturated hydrocarbyl substituent, olefin polymerization catalyst systems prepared therefrom, and the use of such catalyst systems are d... | 02/13/2001 |
| 6162936 | Organometallic fluorenyl compounds, preparation, and use 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.... | 12/19/2000 |
| 6159888 | Polymerization catalyst systems, their preparation, and use A prepolymerized solid catalyst is prepared by reacting a suitable support base with an organoaluminum compound and then reacting that product with an activity promoting amount of water and then reacting the resulting solid cocatalyst with a metallocene a... | 12/12/2000 |
| 6153716 | Polyethylenes containing a unique distribution of short chain branching The present invention provides polymers of ethylene having ethyl branches, a narrow molecular weight distribution, no substantial amount of branches longer than any comonomer employed in the polymerization, and an unusually low branching to density ratio.... | 11/28/2000 |
| 6096915 | Processes to produce organo-aluminoxane compositions Processes are provided that produce organo-aluminoxane compositions. Said processes comprise: desiccating a first mixture, where said first mixture comprises organo-aluminoxane molecules intermixed with a solvent, to produce a first composition, where sai... | 08/01/2000 |
| 6087290 | Si-N-Si-bridged metallocenes, their production and use Novel Si--N--Si bridged metallocenes of the formula [L--Si--Me2 NRSiMe2 L]MX2 wherein L is a C5 H4, C9 H6, or C13 H8 radical, R is alkyl and M is zirconium, tita... | 07/11/2000 |
| 6057410 | Polymeric ligands, polymeric metallocenes, catalyst systems, preparation, and use Polymeric ligands, polymeric metallocenes, and processes for preparing same are provided. The process for preparing polymeric metallocenes comprises reacting a polymeric ligand, a transition metal compound, and an alkali metal compound. In one embodiment,... | 05/02/2000 |
| 6040402 | Polymeric ligands, polymeric metallocenes, catalyst systems, preparation, and use A polymerization process comprising contacting at least one olefin under polymerization conditions with a catalyst composition produced by combining an organoaluminoxane cocatalyst and a polymeric metallocene catalyst prepared by (1) forming a fluorine-co... | 03/21/2000 |
| 6005061 | Organo-aluminoxy product and use In accordance with the present invention there is provided a new solid aluminoxy composition prepared by reacting aluminoxane with a boroxine. Still further there is provided olefin polymerization catalyst systems incorporating the inventive solid alumino... | 12/21/1999 |
| 5990035 | Polymerization catalyst systems, their preparation, and use A solid cocatalyst is prepared by combining (1) a first material capable of affixing an organoaluminum compound with (2) an organic liquid and then adding an organoaluminum compound and then contacting that product with water dispersed in an inert gas. Fu... | 11/23/1999 |
| 5985783 | Prepolymerized catalyst and use thereof A prepolymerized olefin polymerization catalyst, its prepration, and use are disclosed. The catalyst is prepared by contacting a solid particulate transition metal-containing olefin polymerization catalyst with an olefin in a confined zone under suitable ... | 11/16/1999 |
| 5886202 | Bridged fluorenyl/indenyl metallocenes and the use thereof Bridged fluorenyl/indenyl metallocenes having substituents at the 3 position of the indenyl and the use thereof in the polymerization of olefins are disclosed. Also a new method for preparing bridged fluorenyl/indenyl ligands wherein the indenyl has a sub... | 03/23/1999 |
| 5830958 | Polynuclear metallocene preparation and use A process for preparing polynuclear metallocenes by reacting a metallocene in which one of the cyclopentadienyl-containing radicals has a substituent having olefinic or acetylenic unsaturation with a second metallocene having a metal which comes from grou... | 11/03/1998 |
| 5780659 | Substituted indenyl unbridged metallocenes Unbridged metallocenes of titanium, zirconium and hafnium having an unsubstituted cyclopentadienyl radical and an indenyl radical having in at least one of the 1, 2, or 3 positions a substitutent selected from hydrocarbon radicals and trialkylsilyl radica... | 07/14/1998 |
| 5770663 | Metallocene preparation and use Double bound metallocenes, i.e. metallocenes having a cyclopentadienyl-containing radical that is bound to a transition metal both by a pi bond and by a sigma carbon bond of a substituent of that same cyclopentadienyl-containing radical can be prepared by... | 06/23/1998 |
