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| Number | Title | Issue Date |
| 7790819 | Bicyclic organosilicon compounds as electron donors for polyolefin catalysts Cyclic organosilicon compounds that may be employed as an electron donor for polymerization catalyst systems, polymerization catalyst systems employing the cyclic organosilicon compounds as an electron donor, methods of making the polymerization catalyst systems, an... | 09/07/2010 |
| 7666960 | Process for the production of ethylene copolymers A process for the copolymerization of ethylene and α-olefins which utilizes a mixed modifier comprised of a conjugated diene and alkoxysilane is disclosed. ... | 02/23/2010 |
| 7592402 | Process for producing modified particle; carrier; catalyst component for addition polymerization; process for producing catalyst for addition polymerization; and process for producing addition polymer A process for producing a modified particle, which comprises the step of contacting a compound (a) defined by the formula, M1L13, a compound (b) defined by the formula, R1t-1TH, a compound (c) or (e) defined by ... | 09/22/2009 |
| 7585925 | Method of producing a polymer network In a process, a polymer is crosslinked and then reversibly bound to a template that is dissolved or suspended in a solvent. The polymer thereby acquires a conformation adapted to the template such that an interaction enthalpy between the template and the polymer is ... | 09/08/2009 |
| 7521512 | Catalyst composition and polymerization process using mixture of silane electron donors A catalyst composition for the polymerization of olefins comprising the combination of one or more Ziegler-Natta procatalysts comprising one or more transition metal compounds; one or more aluminum containing cocatalysts; and a mixture comprising two or more selecti... | 04/21/2009 |
| 7452947 | Silica-supported polymerization catalyst A process for the preparation of a silicon containing transition metal compound that includes the steps of (a) non-hydrolytic sol-gel condensation of a silane of formula LxSiQn wherein L is a σ-bonded ligand, Q is an anionic ligand, and x+n=4 ... | 11/18/2008 |
| 7449529 | Bimodal blow molding resin and products made therefrom A polymer, and a process of producing the polymer, that comprises at least one olefin and has an ESCR of 100 hours to 500 hours, a density of 0.955 g/cc to 0.959 g/cc, and a flexural modulus of 140,000 psi to 220,000 psi. An article of manufacture that comprises the... | 11/11/2008 |
| 7420022 | Polymerization catalyst system utilizing external donor systems and processes of forming polymers therewith External donor systems, catalyst systems and olefin polymerization processes are described herein. The external donor systems generally include a first external donor represented by the general formula SiR2m(OR3)4-m, where... | 09/02/2008 |
| 7420021 | Self-extinguishing catalyst composition with monocarboxylic acid ester internal door and propylene polymerization process A catalyst composition for the polymerization of propylene comprising one or more Ziegler-Natta procatalyst compositions comprising one or more transition metal compounds and one or more monoesters of aromatic carboxylic acid internal electron donors; one or more al... | 09/02/2008 |
| 7399812 | Silicon ether compounds and a method for the preparation thereof The present invention relates to silicon ether compounds having a general formula (I), a method for the preparation thereof and use thereof as a component of catalysts for polymerization of olefins. In particular, in propylene polymerization, catalyst systems compri... | 07/15/2008 |
| 7351678 | Catalyst systems for Ziegler-Natta propene polymerisation The invention relates to the use of nitrogenous aluminium organyl complexes of general formula (I) as co-catalysts in heterogeneous polymerisation reactions of propene. In said formula: R, R′, R1 and R1′ independently of one another represe... | 04/01/2008 |
| 7332554 | Polymers with new sequence distributions The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene,... | 02/19/2008 |
| 7332555 | Polymers with new sequence distributions The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene,... | 02/19/2008 |
| 7329626 | Ziegler-Natta catalyst, preparation, and use for the polymerization of alkenes A method for making a solid catalytic component for a Ziegler-Natta catalyst includes contacting a particulate porous support with a solution of a hydrocarbon soluble organomagnesium precursor compound in a hydrocarbon solvent; and reacting said hydrocarbon soluble ... | 02/12/2008 |
| 7307036 | Highly active alpha-olefin polymerization catalyst A highly active alpha-olefin polymerization catalyst component is disclosed. In the presence of a co-catalyst, the catalyst component is useful for the production of LLDPE resins. The catalyst component is produced by a method whereby organic silicon compounds are r... | 12/11/2007 |
| 7294680 | Method of producing conjugated diene polymers with narrow molecular weight distribution and polymer produced Conjugated diene polymers having good wear resistance, mechanical properties, storage stability, processability and a reduced cold flow are produced by polymerizing a conjugated diene compound with a catalyst of rare earth element compound, a compound containing at ... | 11/13/2007 |
| 7291665 | Emulsion polymerization methods involving lightly modified clay and compositions comprising same Processes for utilizing various emulsion polymerization procedures for preparing aqueous nanocomposite dispersions are disclosed. The disclosed processes include both in-situ polymerizations in the presence of at least partially exfoliated, lightly modified clays as... | 11/06/2007 |
| 7291686 | Method of producing polymer network Process for the preparation of a polymeric network, in which (i) one or more polymers are made available which can be crosslinked with one another intramolecularly or intermolecularly or intra- and intermolecularly by covalent or non-covalent bonding, | 11/06/2007 |
| 7288611 | Methods for preparing a rare-earth cis-1,4-polybutadiene rubber with a controlled molecular weight distribution Disclosed herein are a method for preparing a cis-1,4-polybutadiene with a controlled molecular weight distribution, comprising polymerizing butadiene monomers using a rare-earth catalyst system comprising: (a) at least one aliphat... | 10/30/2007 |
| 7282546 | Cocatalysts for reduction of production problems in metallocene-catalyzed polymerizations Polyolefins may be prepared using a cocatalyst conforming to the formula: AIRz(Xz)nLzm wherein Rz is a linear or branched organic moiety having at least 5 carbons and Xz | 10/16/2007 |
| 7276463 | Polymerization catalyst for α-olefins and process for production of α-olefin polymers therewith A catalyst having a high catalyst activity, which enables the production of an α-olefin polymer improved in stereoregularity by decreasing an amorphous component, and a production method for the α-olefin polymer, are developed. Described are a catalyst for polymer... | 10/02/2007 |
| 7256243 | Silicon compound The present invention provides a novel silicon compound represented by Formula (1) having a living radical polymerization initiating ability for addition-polymerizable monomers and a polymer obtained using the same. The above polymer can provide an organic-inorganic... | 08/14/2007 |
| 7247686 | Solid cocatalyst component for olefin polymerization and catalyst system thereof A solid cocatalyst for olefin polymerization in which an ion-containing compound comprising a cation expressed by [R4M]+, wherein the group R are each individually selected from the group consisting of hydrogen atom and a substituted or non-substituted hy... | 07/24/2007 |
| 7244795 | Polymerization process using metallocene catalyst systems The present invention relates to a polymerization process using improved metallocene catalyst systems. Specifically, the catalyst systems of the present invention relate to a metallocene compound having optimized metals loading and activator concentration, and demon... | 07/17/2007 |
| 7238818 | Heterocyclic metallocenes and polymerization catalysts A new class of heterocyclic metallocenes, a catalytic system containing them and a process for polymerizing addition polymerizable monomers using said catalytic system are disclosed; the heterocyclic metallocenes correspond to the formula (I): YjR″... | 07/03/2007 |
| 7238758 | Catalysts for polymerization or copolymerization of α-olefins, catalyst components thereof, and processes for polymerization of α-olefins with the catalysts The invention has an object to provide a catalyst for polymerizing or copolymerizing an α-olefin, catalyst constituent thereof, and method of polymerizing α-olefins with the catalyst, for production of α-olefin polymers or copolymers with high hydrogen response, ... | 07/03/2007 |
| 7232872 | Polymerization processes The invention provides for a process to produce polymers utilizing a hydrofluorocarbon diluent. ... | 06/19/2007 |
| 7223823 | Catalyst system and process This invention relates to a process of polymerizing ethylene in a reactor comprising contacting a catalyst system comprising a supported chromium catalyst and an aluminum alkyl cocatalyst, where the catalyst and cocatalyst are contacted by cofeeding the catalyst and... | 05/29/2007 |
| 7220804 | Method for preparing a catalyst system and its use in a polymerization process 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 com... | 05/22/2007 |
| 7220806 | Process for increasing ethylene incorporation into random copolymers A process for preparing low melting copolymers comprising contacting a mixture of olefin monomers with a CpFlu-type metallocene catalyst under reaction conditions sufficient to form a copolymer. The copolymers thus prepared desirably display melt temperatures from a... | 05/22/2007 |
| 7214750 | Polymerization processes The invention relates to new processes to produce polymers utilizing bayonette cooled slurry reactor systems and diluents including hydrofluorocarbons. ... | 05/08/2007 |
| 7211538 | Catalytic systems for the polimerization and copolimerization of alpha-olefins Catalyst component for the polymerization of alpha-olefins in solution, in suspension, in gas phase at low and high pressure and temperature or in mass at high pressures and high or low temperatures, characterized in that is defined by general formulas I or II | 05/01/2007 |
| 7211613 | Hydrophobically modified clay polymer nanocomposites The present invention is directed, in part, to improved nanocomposite compositions and processes for preparing same. Specifically, in one embodiment, there is provided a process for preparing an aqueous nanocomposite dispersion, wherein the process comprises: polyme... | 05/01/2007 |
| 7202191 | Polymerization catalyst system using n-butylmethyldimethoxysilane for preparation of polypropylene film grade resins It has been discovered that using n-butylmethyldimethoxysilane (BMDS) as an external electron donor for Ziegler-Natta catalysts can provide a catalyst system that may prepare polypropylene films with improved properties. The catalyst systems of the invention provide... | 04/10/2007 |
| 7201386 | Wheeled sled A sled is provided which includes a composition configured for use in the sled. The composition includes a polypropylene copolymer having an IZOD impact resistance from about 0.1 ft lb/in to about 30.0 ft lb/in. ... | 04/10/2007 |
| 7199072 | Process of producing a supported mixed catalyst system and polyolefins therefrom A process for preparing a mixed catalyst compound used in the polymerization of polyolefins to produce bimodal polyethylenes is disclosed. In an embodiment, a process of preparing the mixed catalyst system includes: mixing a first catalyst and an activator in a firs... | 04/03/2007 |
| 7183234 | Multi-donor catalyst system for the polymerization of olefins The present invention provides catalyst systems including a Ziegler-Natta or Ziegler-Natta-type catalyst in combination with a mixture of certain electron donors. ... | 02/27/2007 |
| 7173097 | Metathesis-curable composition with a reaction control agent A composition curable by a metathesis reaction upon mixing its components and comprising an olefin-containing substrate, a metathesis catalyst, and a reaction control agent for slowing the progress of the metathesis reaction. The metathesis catalyst is a ruthenium o... | 02/06/2007 |
| 7163905 | Polymerization catalyst system using di-sec-butyldimethoxysilane for preparation of polypropylene It has been discovered that using di-sec-butyldialkoxysilanes, such as di-sec-butyldimethoxysilane (DSBDMS), as external electron donors for Ziegler-Natta catalysts can provide a catalyst system that may prepare polypropylene films with improved properties and proce... | 01/16/2007 |
| 7157522 | Alpha-olefin/propylene copolymers and their use Improved thermoplastic polymer blend compositions comprising an isotactic polypropylene component and an alpha-olefin and propylene copolymer component, said copolymer comprising crystallizable alpha-olefin sequences. In a preferred embodiment, improved thermoplasti... | 01/02/2007 |
