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| Number | Title | Issue Date |
| 7964679 | Process for the polymerization of alpha olefins A process for preparing 1-butene polymers, comprising polymerizing 1-butene or copolymerizing 1-butene with ethylene, propylene or an alpha-olefin of formula CH2═CHT wherein T is a C3-C10 alkyl group, in the presence of a catalyst ... | 06/21/2011 |
| 7956139 | Polymerization catalysts for producing polymers with high comonomer incorporation The present techniques relate to catalyst compositions, methods, and polymers encompassing a Group 4 metallocene compound comprising bridged η5-cyclopentadienyl-type ligands, typically in combination with a cocatalyst, and an activator. The bridged η | 06/07/2011 |
| RE41785 | Group 15 containing transition metal catalyst compounds, catalyst systems and their use in a polymerization process The present invention relates to a Group 15 containing metal catalyst compound having a substituted hydrocarbon leaving group, a catalyst system and a supported catalyst system thereof and to a process for polymerizing olefin(s) utilizing them. ... | 09/28/2010 |
| 7683146 | Supported metal alkyl compound and process for the polymerization of olefins in its presence The present invention relates to pulverulent solids obtainable by reaction of a metal alkyl compound of a divalent or higher-valent metal and a finely divided support which on its surface bears functional groups which can form a chemical bond between the metal atom ... | 03/23/2010 |
| 7645844 | Transition metal complexes, catalyst compositions containing the same, and methods for preparing ethylene homopolymers or copolymers of ethylene and α-olefins using the same The present invention relates to a transition metal complex and a transition metal catalyst composition comprising the same for the preparation of an ethylene homopolymer or a copolymer of ethylene and α-olefin. More particularly, it relates to a group IV transitio... | 01/12/2010 |
| 7442750 | Supported olefin polymerization catalyst Supported catalyst systems are provided comprising (a) a transition metal compound, (b) an activator comprising (iii) an aluminoxane or (iv) a Group lilA metal or metalloid compound, and (c) a support material comprising an inorganic metal oxide, inorganic metal hal... | 10/28/2008 |
| 7429634 | Polymer production at supercritical conditions This invention relates to a process to polymerize olefins comprising contacting, in a polymerization system, olefins having three or more carbon atoms with a catalyst compound, activator, optionally comonomer, and optionally diluent or solvent, at a temperature abov... | 09/30/2008 |
| 7417097 | Organometal compound catalyst 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 cata... | 08/26/2008 |
| 7402718 | Conversion process The invention relates to a conversion process for making olefin(s) using a molecular sieve catalyst composition. More specifically, the invention is directed to a process for converting a feedstock comprising an oxygenate in the presence of a molecular sieve catalys... | 07/22/2008 |
| 7396888 | Catalyst system comprising a mixture of catalyst components for producing a polyolefin blend Provided is a catalyst system for producing a polyolefin blend, which catalyst system comprises a mixture including the following catalyst components: i) a catalyst component A capable of producing an isotactic olefin polymer, and/or a catalyst component A′ capabl... | 07/08/2008 |
| 7365137 | Multistep process for the (co) polymerization of olefins A multistep process for the polymerization of one or more olefins comprising a first step of polymerizing one or more of said olefins in the presence of a catalyst of the Ziegler-Natta type, a step wherein the polymer obtained in the first step is contacted with a c... | 04/29/2008 |
| 7358221 | Metathesis depolymerizable surfactants A class of surfactant molecules whose structure includes regularly spaced unsaturation in the tail group and thus, can be readily decomposed by ring-closing metathesis, and particularly by the action of a transition metal catalyst, to form small molecule products. T... | 04/15/2008 |
| RE40234 | Process for producing crystalline poly-α-olefins with a monocyclopentadienyl transition metal catalyst system The invention is a catalytic process using a Group IV B transition metal component and an alumoxane component to polymerize α-olefins to produce high crystallinity and high molecular weight poly-α-olefins. ... | 04/08/2008 |
| 7354979 | Polymer production at supercritical conditions This invention relates to a process to polymerize olefins comprising contacting, in a polymerization system, olefins having three or more carbon atoms with a catalyst compound, activator, optionally comonomer, and optionally diluent or solvent, at a temperature abov... | 04/08/2008 |
| 7341818 | Norbornene-type monomers and polymers containing pendent lactone or sultone groups The disclosed invention relates to novel norborne-type monomers containing pendent lactone or sultone groups. The invention also relates to norborne-type polymers and copolymers containing pendent lactone or sultone groups. These polymers and copolymers are useful i... | 03/11/2008 |
| 7342078 | Transition metal compound, ligand system, catalyst system and the use of the latter for polymerisation and copolymerisation of olefins A process for the polymerization of olefins, in particular a process for the copolymerization of propylene with further olefins, is carried out in the presence of highly active catalyst systems comprising specifically selected metallocenes, in particular ones which ... | 03/11/2008 |
| 7339018 | Diene-modified propylene copolymers Certain specific embodiments of the invention will now be discussed. For example, a process of preparing a copolymer composition that includes a diene-modified polypropylene copolymer is described, which process includes: contacting a metallocene catalyst compound w... | 03/04/2008 |
| 7335710 | Polymerization process A process for the polymerisation of olefins is described involving the use of a catalyst system comprising a supported transition metal compound and an activator based on an organoborane and an aluminoxane. Preferably the transition metal compound is a metallocene c... | 02/26/2008 |
| 7332551 | Partially fluorinated naphthyl-based borates Non-coordinating anions or anion precursors are disclosed. These non-coordinating anions serve as the activator for olefin polymerization catalyst systems. As such, they abstract an alkyl leaving group from a metallocene catalyst precursor leaving an activated catal... | 02/19/2008 |
| 7326756 | High temperature bulk polymerization of branched crystalline polypropylene Branched crystalline polypropylene compositions and methods for the preparation of branched crystalline polypropylene compositions are provided. For example, described herein is a process of preparing branched crystalline polypropylene composition that comprises con... | 02/05/2008 |
| 7323526 | Supported metallocene-alkyl catalyst composition 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 μm and calcined at a temperature greater than 600° C., and ... | 01/29/2008 |
| 7319125 | Supercritical polymerization process and polymers produced therefrom This invention relates to a process to produce propylene polymers comprising contacting a metallocene catalyst compound and an activator in a reaction medium comprising propylene, from 0 to 30 volume % of one or more solvents and from 0 to 30 mole % of one or more c... | 01/15/2008 |
| 7312283 | Polymerization catalysts and process for producing bimodal polymers in a single reactor 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... | 12/25/2007 |
| 7309740 | Biaxially oriented polypropylene film A biaxially stretched polypropylene film of the present invention has high stiffness in the film longitudinal direction and can be manufactured by a conventional longitudinal-transverse sequential biaxial stretching method, since the biaxially stretched polypropylen... | 12/18/2007 |
| 7309747 | Highly flowable 1-butene polymer and process for producing the same A 1-butene polymer satisfying the following (1), (2) and either (3) or (3′): a process for producing the polymer; a resin modifier comprising the polymer; and a hot-melt adhesive containing the polymer. (1) The intrinsic viscosity [η] as measured in tetralin solv... | 12/18/2007 |
| 7294599 | Acidic activator-supports and catalysts for olefin polymerization 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 metall... | 11/13/2007 |
| 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 |
| 7291575 | Active, heterogeneous bi- or tri-dentate catalyst A catalyst composition, and olefin polymerization process using same, formed from a mixture of a non-aluminoxane aluminum compound, an inorganic oxide and a transition metal bidentate or tridentate complex in certain prescribed proportions. The composition can be fo... | 11/06/2007 |
| 7288598 | Polyolefin masterbatch for preparing impact-resistant polyolefin articles A masterbatch composition comprising (1) 10-50 wt % of a crystalline propylene homopolymer and (2) 50-90 wt % of a blend consisting of (a) a copolymer of ethylene and one or more C4-CIO a-olefin(s), containing 10-40 of C4-CIO a-olefin(s), and (b) an amorphous copoly... | 10/30/2007 |
| 7288596 | Polyethylene compositions having improved tear properties Disclosed are various compositions, including but not limited to a high density multimodal polyethylene composition, that has a density of 0.935 g/cc or more, and that includes a blend of a first polyethylene component and a second polyethylene component, in which: ... | 10/30/2007 |
| 7285513 | Preparation of catalyst systems The present invention relates to a process for preparing a catalyst for olefin polymerization which is obtainable by bringing A) at least one organic transition metal compound, B) a mixture of at least two different organo metallic compound... | 10/23/2007 |
| 7285608 | Metallocene ligands, metallocene compounds and metallocene catalysts, their synthesis and their use for the polymerization of olefins A catalyst system includes a metallocene compound having the formula R9 L1 L2 M1 R1 R2 wherein R9 is a bridge between ligands L1 and L2 and M1 is a metal of... | 10/23/2007 |
| 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 |
| 7276567 | Heterocyclic substituted metallocene compounds for olefin polymerization This invention relates to compounds represented by formula: wherein M is a group 3, 4, 5 or 6 transition, lanthanide, or actinide metal atom; E is an indenyl ligand substituted in any po... | 10/02/2007 |
| 7273914 | Olefin polymerization methods Methods for making polyolefins are disclosed. One method comprises polymerizing an olefin in the presence of a catalyst system comprising a single-site complex, an agglomerated metal oxide/clay support-activator, and an ionic borate. Including an ionic borate with t... | 09/25/2007 |
| 7273912 | Supported olefin polymerization catalyst Supported catalyst systems are provided comprising (a) a transition metal compound, (b) a non aluminoxane activator comprising, and (c) a support material comprising an inorganic metal oxide, inorganic metal halide or polymeric material or mixtures thereof character... | 09/25/2007 |
| 7271277 | Fulvene, metallocene catalysts and preparation method thereof, and preparation of polyolefines copolymer using the same The present invention relates to a novel fulvene compound and a preparation method thereof, and more particularly to a fulvene compound having substituted groups in the 2- and 5-positions, prepared from an unsaturated ketone having a substituted group in the β-posi... | 09/18/2007 |
| 7271226 | Olefin polymerisation process A process for the homopolymerisation of ethylene or the copolymerisation of ethylene and (a-olefins in a polymeristation reactor, said process carried out in the presence of a catalyst system comprising (a) a polymerisation catalyst and (b) an ionic activator is cha... | 09/18/2007 |
| 7268196 | Process for producing cycloolefin addition polymer A process for producing a cycloolefin addition polymer in which one or more cycloolefin monomers can be (co)polymerized by addition polymerization with a small palladium catalyst amount to produce a cycloolefin addition (co)polymer while attaining high catalytic act... | 09/11/2007 |
| 7268194 | Continuous slurry polymerization process and apparatus A process of converting a loop reactor into multiple loop reactors comprising starting with a loop reactor comprising at least 8 vertical legs, at least two non-vertical conversion runs, each non-vertical run connected in fluid flow communication with two vertical l... | 09/11/2007 |
