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| Number | Title | Issue Date |
| 7732541 | Polymers comprising in their skeleton an endo ethylenic unsaturation, and preparation processes therefor The invention relates to polymers comprising a sequence of units comprising an ethylenic unsaturation, the unsaturation being located every 3 carbon atoms between two successive units. The invention also relates to processes for preparing such polymers. ... | 06/08/2010 |
| 7728085 | Process for producing ethylene- α -olefin-polyene random copolymer The present invention provides a process for producing an ethylene-α-olefin-unconjugated polyene random copolymer in an aliphatic hydrocarbon solvent under conditions of high-temperature and high-activity. The process comprises polymerizing at least the following c... | 06/01/2010 |
| 7714084 | Catalysts for catalytic chain transfer Cobaloxime derivatives and methods of producing cobaloxime derivatives are disclosed herein. Methods of producing decolorized homo- and co-polymers through polymerization of monomers in presence of the cobaloxime derivatives and decolorization of the produced polyme... | 05/11/2010 |
| 7468416 | Catalyst composition for olefin polymerization A process for the preparation of a catalyst system includes the steps of combining a Lewis base, an organic compound having at least one functional group containing active hydrogen, and an organometallic component with a particulate support material to provide an in... | 12/23/2008 |
| 7442667 | Preparation of supported cocatalysts The present invention relates to a process for preparing a supported cocatalyst for olefin polymerization, which comprises reacting A) a support bearing functional groups, B) triethylaluminum and C) a compound of the formula (I), (R | 10/28/2008 |
| 7439379 | Transition metal complex, catalyst for olefin polymerization, and process for producing olefin polymer with the same The present invention relates to a transition metal complex represented by the formula (I): wherein M represents a Group 4 transition metal; —Y— represents (a): —C(R... | 10/21/2008 |
| 7414005 | Preparation of catalyst compositions having improved activity The present invention relates to a process for preparing a catalyst composition for olefin polymerization, which comprises preparing a catalyst solid in a first step by bringing A) at least one support, B) at least one organic compound having at least one functional... | 08/19/2008 |
| 7371803 | Catalyst composition II This invention relates to a transition metal catalyst compound represented by the formula: LMX2 or (LMX2)2 wherein each M is independently a Group 7 to 11 metal, preferably a Group 7, 8, 9, or 10 metal; each L is, independently, a tr... | 05/13/2008 |
| 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 |
| 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 |
| 7329898 | Transition metal complex and light-emitting device A light-emitting device comprising a pair of electrodes and one or more organic layers disposed between the electrodes, the one or more organic layers comprising a light-emitting layer. At least one of the organic layers comprises a transition metal complex containi... | 02/12/2008 |
| 7323529 | Method of making copolymers containing olefinic type monomers Copolymers containing residues of at least one olefinic monomer and a method of making such copolymers including the steps of: (a) providing a pressurized stirred tank; (b) feeding monomer compositions to one or more stirred tank reactors, ... | 01/29/2008 |
| 7323523 | Adjusting polymer characteristics through process control Properties of a polymer produced in gas phase or slurry phase using a dual catalyst such as polydispersity and comonomer incorporation, may be controlled by controlling reaction parameters such as temperature, (co)monomer pressure, hydrogen partial pressure and the ... | 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 |
| 7314903 | Catalyst system for the polymerization of olefins An organometallic compound obtainable by contacting: a compound having the following formula (I), wherein: Ra is a hydrocarbon radical; Rb, Rc and Rd, are hydrogen atoms, halogen atoms, or hydrocarbon radicals; with a Lewi... | 01/01/2008 |
| 7309741 | Polyolefin blends and pipe A polyolefin blend comprising: (a) from 30 to 80 weight % of a low molecular weight copolymer comprising from 85 to 100 weight % of ethylene and from 15 to 0 weight % of one or more C4-8 alpha olefins having a density fr... | 12/18/2007 |
| 7304159 | Ligands and catalyst systems thereof for ethylene oligomerisation to linear alpha olefins Mixed bis-imine pyridine ligands of formula (I), wherein Z1, which is different from Z2, is an optionally substituted aryl group; and Z2 comprises an optionally substituted heterohydrocarbyl moiety, or an optionally substituted aryl ... | 12/04/2007 |
| 7294679 | Catalyst support method and polymerization with supported catalysts This invention relates to a method to support one or more catalyst compounds comprising contacting the catalyst compounds with a pretreatment agent comprising an aluminum alkyl and or an alumoxane in solution and thereafter contacting the combination with a supporte... | 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 |
| 7285606 | Process for the preparation of a polyolefin The invention related to a process for the polymerization of at least one aliphatic or aromatic hydrocarbyl C2-20 mono- or multiolefin in the presence of a catalyst and a boron comprising co-catalyst, wherein the catalyst comprises a composition of a metal-organic r... | 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 |
| 7247687 | Late transition metal catalysts for olefin polymerization and oligomerization This invention relates to a transition metal compound represented by the formula LMX wherein M is a Group 3 to 11 metal L is a bulky bidentate or tridentate neutral ligand that is bonded to M by two or three heteroatoms and at least one heteroatom is nitrogen; X is ... | 07/24/2007 |
| 7241848 | Process for preparing low molecular weight olefin (CO)polymer and polymerization catalyst used therefor The present invention provides a process for preparing a low molecular weight olefin (co)polymer having a narrow molecular weight distribution with high productivity, by polymerizing or copolymerizing an olefin in the presence of an olefin polymerization catalyst co... | 07/10/2007 |
| 7241715 | Bridged bi-aromatic ligands, catalysts, processes for polymerizing and polymers therefrom New ligands and compositions with bridged bis-aromatic ligands are disclosed that catalyze the polymerization of monomers into polymers. These catalysts with metal centers have high performance characteristics, including higher comonomer incorporation into ethylene/... | 07/10/2007 |
| 7241847 | 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... | 07/10/2007 |
| 7241714 | Bridged bi-aromatic catalysts, complexes, and methods of using the same Ligands, compositions, metal-ligand complexes and arrays with substituted bridged bis-biaromatic ligands, and methods of making and using the same, are disclosed that are useful in the catalysis of transformations such as the polymerization of monomers into polymers... | 07/10/2007 |
| 7238764 | Process for the co-oligomerisation of ethylene and alpha olefins A process for production of higher linear alpha olefins and/or alkyl-branched alpha olefins, which comprises the co-oligomerisation of one or more alpha olefins with ethylene in the presence of a metal catalyst system employing one or more bis-aryliminepyridine MX | 07/03/2007 |
| 7232869 | Catalyst composition for olefin polymerization A process for the preparation of a catalyst system includes the steps of combining a Lewis base, an organic compound having at least one functional group containing active hydrogen, and an organometallic component with a particulate support material to provide an in... | 06/19/2007 |
| 7223893 | Linear alpha-olefin dimers possessing substantial linearity Linear 1-butene dimers and other linear alpha-olefin dimers are manufactured in high yield and with high selectivity by coupling of alpha-olefins. The coupling is accomplished by contacting alpha olefins with an iron-based catalyst activated with an aluminum-based c... | 05/29/2007 |
| 7220695 | Supported activator This invention relates to supported activators comprising the product of the combination of an ion-exchange layered silicate, an organoaluminum compound, and a heterocyclic compound, which may be substituted or unsubstituted. This invention further relates to cataly... | 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 |
| 7217676 | Hydrophobization and silica for supported catalyst This invention relates to a catalyst support comprising the result of the combination of: (a) a support comprising hydroxyl groups; (b) a capping agent comprising a boron containing Lewis acid; and (c) an ionic activator, where... | 05/15/2007 |
| 7214746 | Phosphorus bridged metallocene compounds for olefin polymerization This invention relates to metallocene compounds represented by formula: wherein M is a group 3, 4, 5 or 6 transition metal atom, or a lanthanide metal atom, or actinide metal atom; E is ... | 05/08/2007 |
| 7214744 | Borate activator A catalyst system comprising (i) a bulky ligand catalyst compound; and (ii) a novel borate activator is active for olefin polymerization. The novel borate contains at least one chelating (divalent) ligand and contains at least one fluorine atom. Preferred borate act... | 05/08/2007 |
| 7208549 | Cure system for polyisoprene rubber The present invention is based upon the unexpected finding that polyisoprene rubber which is clear and of high purity can be cured utilizing the curative system of this invention to attain an elongation at break of greater than 1200% without compromising the clarity... | 04/24/2007 |
| 7208605 | Functionalized ionic liquids, and methods of use thereof One aspect of the present invention relates to ionic liquids comprising a pendant Bronsted-acidic group, e.g., a sulfonic acid group. Another aspect of the present invention relates to the use of an ionic liquid comprising a pendant Bronsted-acidic group to catalyze... | 04/24/2007 |
| 7202190 | Supported catalyst system for the polymerization of olefins A supported catalyst system for polymerizing olefins comprising a) a support, b) a Lewis base of the formula M3R6R7R8 (I) wherein M3 is an element... | 04/10/2007 |
| 7199073 | Resins that yield low haze films and the process for their production 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 ar... | 04/03/2007 |
