HYDRAULIC DRIVING MECHANISM TO ROTATE a FOREUSEAU ROCK

MANUFACTORING PROCESS OF LAYERS OF CHEMICO-MECANICAL POLISHING

La présente invention concerne un procédé de fabrication de couches de polissage pour une utilisation dans des tampons de polissage chimico-mécanique, une pluralité de couches de polissage étant dérivée d'une galette, la formation de défauts de densité dans la galette et la rugosité de surface des couches de polissage formées étant minimisées.

PROCESS AND APPARATUS FOR THE PRODUCTION OF LEAD 212 HAVE MEDICAL USE

L'invention se rapporte à un procédé qui permet de préparer du plomb 212 à usage médical. Ce procédé comprend la production de plomb 212 par décroissance de radium 224 dans un générateur comprenant un milieu solide sur lequel est retenu le radium 224, suivie de l'extraction du plomb 212 du générateur sous la forme d'une solution aqueuse A1, et est caractérisé en ce que le plomb 212 contenu dans la solution aqueuse A1 est purifié vis-à-vis des impuretés radiologiques et chimiques que contient également cette solution par une chromatographie en phase liquide sur colonne. L'invention se rapporte également à un appareil spécialement conçu pour la mise en œuvre automatisée et en système fermé dudit procédé. Elle se rapporte en outre au plomb 212 produit au moyen de ce procédé et de cet appareil. Applications : fabrication de radiopharmaceutiques à base de plomb 212, utiles en médecine nucléaire, pour le traitement de cancers, notamment par radio-immunothérapie α, ou pour l'imagerie médicale, ...

ASSEMBLY Of SEALING SEGMENTS

Systèmes et dispositifs destinés à rendre étanches des parties de machines tournantes. Selon un mode de réalisation, un élément d'assemblage d'étanchéité (210, 211) comprend une bride de tête (216) et un col axial (218) relié à la bride de tête (216). Le col axial (218) comprend une bride conjuguée (252, 275) qui s'étend sur la circonférence, depuis une extrémité distale de l'élément d'assemblage d'étanchéité (210, 211). La bride conjuguée (252, 275) est configurée pour former un joint d'étanchéité multidirectionnel avec une partie en retrait (242) d'un élément d'assemblage d'étanchéité (210, 211) complémentaire. L'élément d'assemblage d'étanchéité comprend également un ensemble de dents d'étanchéité axiales (270) reliées au col axial (218).

PROCESS ALLOWING TO IDENTIFY COMBINE ACTIVE IN a SYSTEM OF CORDLESS PHONE

CARBON NANOTUBE SENSOR

METHOD AND APPARATUS FOR PRODUCING MEDICAL LEAD 212

NEUE EXENDIN AGONIST FORMULIERUNGEN UND DEREN VERABREICHUNG

PROCESS FOR PRODUCING LAYERS OF MECHANISM WITH A WINDOW

REMOTE CONTROL OF SENSOR IN CARBON NANOTUBE

La présente invention fournit un système de contrôle à distance destiné à contrôler le fonctionnement d'un système de traitement de fluide et/ou les qualités, caractéristiques, propriétés, etc., du fluide transformé ou traité par le système de traitement de fluide. La présente invention concerne également des capteurs en nanotube de carbone.

TRACTOR TO MOVE AND APPLY UNDER PRESSURE BY ORDER HAS DISTANCEUNE DRILLING MACHINE WITH THE ROCK

MANUFACTORING PROCESS OF LAYERS OF CHEMICO-MECANICAL POLISHING

Un procédé de fabrication de couches de polissage pour l'utilisation dans les tampons de polissage chimico-mécanique est produit, dans lequel la formation de défauts de densité dans les couches de polissage est réduite au maximum. Pour préparer une couche de polissage, on introduit un mélange thermodurcissable dans la cavité (20) d'un moule ayant une zone de type trou de tore (40) et une zone de type tore (50), par une buse dont l'orifice se déplace par rapport à la base du moule, selon une phase initiale dans laquelle l'orifice est dans la zone de type trou de tore, une phase de transmission dans laquelle l'orifice passe à la zone de type tore et une phase restante dans laquelle l'orifice est dans la zone de type tore.

PROCESS FOR PRODUCING LAYERS OF CHEMICAL MECHANICAL POLISHING

PREVENTING SURGE IN A SYSTEM FOR GENERATING ELECTRIC POWER AIRCRAFT

SYSTEM AND METHOD FOR RECORDING A FINGERPRINT OF PARAMETERIZATION METHOD FOR OPENING ANY APPLICATION SESSION AND LOG OF THE APPLICATION.

SYSTEM AND PROCESS Of RECORDING Of a DIGITAL FINGERPRINT OF PARAMETER SETTING Of a PROCESS Of OPENING OF SESSION Of an APPLICATION AND OPENING Of a SESSION OF the APPLICATION.

L'invention concerne des systèmes (1) et des procédés pour enregistrer des empreintes digitales, paramétrer un procédé d'ouverture de session pour une application et ouvrir une session de l'application. Dans la phase d'enregistrement, le système reçoit un signal d'empreinte digitale, qui est attribué à l'une des nombreuses données liées aux doigts. Dans la phase de paramétrage du procédé d'ouverture de session, le système détecte un signal d'ouverture de session, qui comprend une identité, un mot de passe et une instruction pour exécuter l'application. Le système commande l'affichage des données liées aux empreintes digitales et reçoit un message de sélection correspondant à l'une des données liées aux doigts. Le système attribue l'application, l'identité, le mot de passe aux données liées aux empreintes digitales sélectionnées. Dans la phase d'ouverture de session, le système reçoit le signal d'empreinte digitale et, de cette façon, extrait l'application correspondante, l'identité correspondante ...

MANUFACTORING PROCESS OF LAYERS OF CHEMICO-MECANICAL POLISHING INCLUDING/UNDERSTANDING A WINDOW

La présente invention concerne un procédé de fabrication de couches de polissage comprenant une fenêtre pour une utilisation dans des tampons de polissage chimico-mécanique, une pluralité de couches de polissage comprenant une fenêtre intégrale étant dérivée d'une galette, la formation de défauts de densité dans la galette et la rugosité de surface des couches de polissage formées étant minimisées.

PREVENTION OF OVERPRESSURES IN a SYSTEM OF GENERATION Of Electrical energy Of PLANE

Un exemple de procédé de détection d'une condition de surtension de génératrice comprend prédire un courant de commande primaire pour fournir un courant de commande prédit, surveiller le courant de commande primaire, et détecter une condition de surtension de génératrice sur la base d'une comparaison entre le courant de commande prédit et le courant de commande primaire. Le procédé interrompt le courant de commande primaire sur la base de la comparaison.

SENSOR IN CARBON NANOTUBE

La présente invention fournit un système de surveillance à distance destiné à surveiller le fonctionnement d'un système de traitement de fluide et/ou les qualités, caractéristiques, propriétés, etc., du fluide transformé ou traité par le système de traitement de fluide. La présente invention concerne également des capteurs en nanotube de carbone.

APPARATUS FOR DIVERTING PIECES OF FOOD SOLID SUSPENDED IN A FLOWING LIQUID.

PROCESS FOR PRODUCING LAYERS OF CHEMICAL MECHANICAL POLISHING

ACTIVE SUPPRESSION AND INSULATION OF VIBRATIONS WITH REACTION AND ANTEREACTION FOR a FRAME OF ENGINE Of PLANE

Une structure de bâti moteur (300) est pourvue de mécanismes anti-vibrations actifs (36) qui sont fixés au voisinage du bâti moteur (30) pour empêcher des vibrations du moteur de se propager jusque dans la structure de support (32) du moteur, par exemple la structure de l'aile ou de fuselage d'un avion. De plus, des détecteurs (40/42) sont disposés sur le moteur (34) et/ou la structure de l'aile/fuselage (32) pour fournir des signaux de commande aux mécanismes anti-vibrations actifs (36) de façon que le mécanisme anti-vibrations actifs réagisse aux données détectées pour limiter le plus possible la transmissibilité de vibrations du moteur (34) à la l'aile/au fuselage (32).

ACTIVE VIBRATION SUPPRESSION AND ISOLATION AND ANTEREACTION WITH FEEDBACK FOR AN AIRCRAFT ENGINE MOUNT

SEGMENTED SEAL ASSEMBLY

APPARATUS FOR DIVERTING PIECES OF FOOD SOLID SUSPENDED IN A FLOWING LIQUID.

Valve de distribution pour un système d'hydrocoupe. La valve dévie automatiquement un écoulement de liquide et de produits alimentaires solides s'écoulant à partir d'une source vers l'une ou les deux de deux destinations. Un conduit d'entrée reçoit les produits alimentaires en suspension dans le liquide, et une plaque coudée dévie les produits alimentaires vers le bas. Les produits alimentaires et le liquide pénètrent dans un tambour qui est perpendiculaire au conduit d'entrée, provoquant une circulation rotative dans le tambour. Les produits alimentaires et le liquide s'écoulent dans l'une ou les deux des deux sorties longitudinalement opposées, selon que la trajectoire en aval des sorties s'écoule. Suite à l'actionnement d'une valve d'un côté ou le blocage essentiellement complet d'un côté, le fluide et les produits s'écoulent de l'autre côté automatiquement. Aucune partie mobile n'est nécessaire dans la valve pour changer la trajectoire d'écoulement; le seul changement est l'écoulement ...

Unlösliche Proteinpartikel

VERWENDUNG VON EXENDINEN UND DEREN AGONISTEN ZUR BEHANDLUNG VON HYPERTRIGLYCERIDÄMIE

HERBICIDE

METHOD FOR OBTAINING OF NITROCOMPOUNDS

High voltage resistive output stage circuit

Some embodiments include a high voltage, high frequency switching circuit. The switching circuit may include a high voltage switching power supply that produces pulses having a voltage greater than 1 kV and with frequencies greater than 10 kHz and an output. The switching circuit may also include a resistive output stage electrically coupled in parallel with the output and between the output stage and the high voltage switching power supply, the resistive output stage comprising at least one resistor that discharges a load coupled with the output. In some embodiments, the resistive output stage may be configured to discharge over about 1 kilowatt of average power during each pulse cycle. In some embodiments, the output can produce a high voltage pulse having a voltage greater than 1 kV and with frequencies greater than 10 kHz with a pulse fall time less than about 400 ns.

Partially transparent wound dressing

A partially transparent dressing includes a fluid management core having a first side and a second, wound-facing side. The fluid management core includes an absorbent material and a plurality of optically transparent windows. The dressing includes a barrier layer coupled to the first side and a patient interface layer coupled to the second side. A fluid communication port is disposed in the second side. An opening is disposed in the patient interface layer. The opening is configured to receive fluid from a wound.

High voltage resistive output stage circuit

Some embodiments include a high voltage, high frequency switching circuit. The switching circuit may include a high voltage switching power supply that produces pulses having a voltage greater than 1 kV and with frequencies greater than 10 kHz and an output. The switching circuit may also include a resistive output stage electrically coupled in parallel with the output and between the output stage and the high voltage switching power supply, the resistive output stage comprising at least one resistor that discharges a load coupled with the output. In some embodiments, the resistive output stage may be configured to discharge over about 1 kilowatt of average power during each pulse cycle. In some embodiments, the output can produce a high voltage pulse having a voltage greater than 1 kV and with frequencies greater than 10 kHz with a pulse fall time less than about 400 ns.

Elbow replacement apparatus and methods

Apparatus and methods for total elbow replacement are provided to allow a surgeon to intraoperatively select a linked or unlinked constraint by utilizing a connection located on the body of the ulnar and/or humeral stem. Additional modularity also allows the selection of a cemented or cementless stem as described herein. The modularity and adjustability provides a number of advantages.

Introducing real-time lighting effects to illuminate real-world physical objects in see-through augmented reality displays

Embodiments provide for the rendering of illumination effects on real-world objects in augmented reality systems. An example method generally includes overlaying a shader on the augmented reality display. The shader generally corresponds to a three-dimensional geometry of an environment in which the augmented reality display is operating, and the shader generally comprises a plurality of vertices forming a plurality of polygons. A computer-generated lighting source is introduced into the augmented reality display. One or more polygons of the shader are illuminated based on the computer-generated lighting source, thereby illuminating one or more real-world objects in the environment with direct lighting from the computer-generated lighting source and reflected and refracted lighting from surfaces in the environment.

Vehicle and trailer backup guidance system

A trailer maneuvering guidance system for a vehicle includes vehicle-based cameras disposed at a vehicle and a trailer camera disposed at a rear portion of a trailer hitched to the vehicle. A control includes a processor that processes image data captured by the cameras. A display screen is disposed in the vehicle and viewable by a driver of the vehicle. The display screen displays images derived from captured image data, with the displayed images including bird's-eye view images of a region at least partially surrounding the vehicle and trailer including an area rearward of the trailer. Responsive to a user input selecting a target path in the displayed images, the control, via processing of captured image data, generates instructions for the driver of the vehicle to follow to maneuver the vehicle and trailer along the selected target path and toward a target location.

Polymerization Processes

Polymerization processes to produce polyolefin polymers, for example, polyethylene polymers, from catalyst systems comprising one or more olefin polymerization catalysts and at least one activator are provided. The polyolefin polymers may have a Broad Orthogonal Composition Distribution (BOCD).

High voltage resistive output stage circuit

Some embodiments include a high voltage, high frequency switching circuit. The switching circuit may include a high voltage switching power supply that produces pulses having a voltage greater than 1 kV and with frequencies greater than 10 kHz and an output. The switching circuit may also include a resistive output stage electrically coupled in parallel with the output and between the output stage and the high voltage switching power supply, the resistive output stage comprising at least one resistor that discharges a load coupled with the output. In some embodiments, the resistive output stage may be configured to discharge over about 1 kilowatt of average power during each pulse cycle. In some embodiments, the output can produce a high voltage pulse having a voltage greater than 1 kV and with frequencies greater than 10 kHz with a pulse fall time less than about 400 ns.

Asymmetric ANSA-Metallocene Catalyst Compounds for Producing Polyolefins Having a Broad Molecular Weight Distribution

The present disclosure relates to asymmetric ansa-metallocene catalyst compounds that include at least one indenyl ligand substituted at the 3-position with a C3-C40 α-branched alkyl, such as 1-methylethyl, 1-methylpropyl, 1-methylbutyl, 1-ethylbutyl, 1,3-dimethylbutyl, 1-methyl-1-ethylbutyl, 1,1-diethylbutyl, 1-propylpentyl, and the like. Catalyst systems prepared with the catalyst compounds, polymerization methods using such catalyst systems, and polyolefins made using the polymerization methods are also described.

Catalysts that Produce Polyethylene with Broad, Bimodal Molecular Weight Distribution

The present disclosure relates to ansa-metallocene catalyst compounds that include (1) a first indenyl ligand substituted at the 3-position with a substituted or unsubstituted C4-C40 hydrocarbyl group, wherein the hydrocarbyl group is branched at the β-position, and (2) a second indenyl ligand substituted at its 3-position with a substituted or unsubstituted alkyl group or a β-branched alkyl group. Catalyst systems prepared with the catalyst compounds, polymerization methods using such catalyst systems, and polyolefins made using the polymerization methods are also described.

Computer method and apparatus for providing proprietary rights transactions

A computer method for secure transfer of a blockchain token representing an interest in a proprietary rights asset includes displaying at least summary information corresponding to a proprietary rights asset to a user on an electronic display according to a user interface. The computer method includes receiving, from the user via the user interface, an order to exchange a first quantity of cryptographic currency held by the user at a user wallet memory address for a second quantity of asset tokens representing at least a fractional interest in the proprietary rights asset, writing data corresponding to a pending transfer of the second quantity of asset tokens to the user wallet address, and receiving data corresponding to the first quantity of cryptographic currency into a transaction wallet memory address.

Method for licensing proprietary rights using a blockchain

A computer method for licensing proprietary rights using a blockchain includes displaying a graphical user interface (GUI) to a first user representing a first enterprise. The GUI includes a selection object for selecting one item from one or more standard proprietary rights agreements. The computer method receives, into a server computer from the first user via the GUI, a selection of one of the one or more standard proprietary rights agreements for making a proprietary rights agreement with a second enterprise, and provides, via the GUI, an executable electronic document corresponding to the selected proprietary rights agreement to a user having signature authority representing the first enterprise and to a user having signature authority representing the second enterprise. The computer method further receives, into the server computer, data corresponding to execution of the electronic document from the first enterprise and the second enterprise, and records the execution of the selected proprietary rights agreement between the first and second enterprises on a blockchain.

Extended on-screen gameplay via augmented reality

Various embodiments of the invention disclosed herein provide techniques for extending on-screen gameplay via an augmented reality (AR) system. An extended AR application executing on an AR headset system receives, via a game controller, first data associated with a first object associated with a computer-generated game. The extended AR application renders an augmented reality object based on the first data associated with the first object. The extended AR application displays at least a first portion of the augmented reality object via an augmented reality headset system. Further, an image associated with the computer-generated game is simultaneously rendered on a display monitor

Low fault current isolator system

A low fault current isolation arrangement senses a loss of voltage and automatically isolates and de-energizes a down live primary wire if overcurrent protection devices have not cleared the high impedance fault in an electric power distribution network. Incorporating an operator selectable time delay response, the low fault current isolation arrangement permits overcurrent protection devices to attempt to detect and shut down the affected conductor, and then isolates and shuts down the low current fault if the overcurrent devices are not successful. The isolation arrangement continuously monitors AC voltage as remotely provided by smart meters even after a fault location is de-energized, and serves as a back up, and not as a replacement, for existing overcurrent protection schemes. A host computer operates in conjunction with plural smart meters each coupled to an associated customer distribution transformer in conjunction with the fault isolator to detect and shut down high impedance faults.

Low fault current isolator system

A low fault current isolation arrangement senses a loss of voltage and automatically isolates and de-energizes a down live primary wire if overcurrent protection devices have not cleared the high impedance fault in an electric power distribution network. Incorporating an operator selectable time delay response, the low fault current isolation arrangement permits overcurrent protection devices to attempt to detect and shut down the affected conductor, and then isolates and shuts down the low current fault if the overcurrent devices are not successful. The isolation arrangement continuously monitors AC voltage as remotely provided by smart meters even after a fault location is de-energized, and serves as a back up, and not as a replacement, for existing overcurrent protection schemes. A host computer operates in conjunction with plural smart meters each coupled to an associated customer distribution transformer in conjunction with the fault isolator to detect and shut down high impedance faults.

Retrospective capture trigger

An event marking device marks the real time at which notable events occur. When a notable event occurs, a user causes the event marking device to generate a trigger signal. The event marking device includes a real-time clock. When the user causes a trigger signal to be generated, a microcontroller of the event marking device reads the real-time clock and writes trigger event data to a memory indicating a real time at which the trigger signal was generated. The event marking device outputs the trigger event data to an external device.

High Voltage Transformer

A high-voltage transformer is disclosed. The high-voltage transformer includes a transformer core; at least one primary winding wound once or less than once around the transformer core; a secondary winding wound around the transformer core a plurality of times; an input electrically coupled with the primary windings; and an output electrically coupled with the secondary windings that provides a voltage greater than 1,1200 volts. In some embodiments, the high-voltage transformer has a stray inductance of less than 30 nH as measured on the primary side and the transformer has a stray capacitance of less than 100 pF as measured on the secondary side.

High voltage nanosecond pulser with variable pulse width and pulse repetition frequency

A nanosecond pulser is disclosed. In some embodiments, the nanosecond pulser may include one or more switch circuits including one or more solid state switches, a transformer, and an output. In some embodiments, the transformer may include a first transformer core, a first primary winding wound at least partially around a portion of the first transformer core, and a secondary winding wound at least partially around a portion of the first transformer core. In some embodiments, each of the one or more switch circuits are coupled with at least a portion of the first primary winding. In some embodiments, the output may be electrically coupled with the secondary winding and outputs electrical pulses having a peak voltage greater than about 1 kilovolt and a rise time of less than 150 nanoseconds or less than 50 nanoseconds.

Low pressure dielectric barrier discharge plasma thruster

Some embodiments of the invention include a thruster system comprising a thruster and a pulsing power supply. The thruster may include a gas inlet port; a plasma jet outlet; and a first electrode. In some embodiments, the pulsing power supply may provide an electrical potential to the first electrode with a pulse repetition frequency greater than 10 kHz, a voltage greater than 5 kilovolts. In some embodiments, the pressure downstream from the thruster can be less than 10 Torr. In some embodiments, when a plasma is produced within the thruster by energizing a gas flowing into the thruster through the gas inlet port, the plasma is expelled from the thruster through the plasma jet outlet.

Elbow replacement apparatus and methods

Apparatus and methods for total elbow replacement are provided to allow a surgeon to intraoperatively select a linked or unlinked constraint by utilizing a connection located on the body of the ulnar and/or humeral stem. Additional modularity also allows the selection of a cemented or cementless stem as described herein. The modularity and adjustability provides a number of advantages.

Current transformer with flexible secondary winding

A current transformer includes a pre-formed core forming a closed loop with a flexible axially wound secondary winding. A continuous length of wire is axially coiled around a flexible bobbin to form a secondary winding. The resulting secondary winding may be slid onto the closed loop of the pre-formed core. The flexibility of the axially wound secondary winding facilitates conformity to a non-linear shape of the pre-formed core.

Method of producing polyethylene and polyethylene thereof

A system and method of producing polyethylene, including: polymerizing ethylene in presence of a catalyst system in a reactor to form polyethylene, wherein the catalyst system includes a first catalyst and a second catalyst; and adjusting reactor conditions and an amount of the second catalyst fed to the reactor to control melt index (MI), density, and melt flow ratio (MFR) of the polyethylene.

Method of producing polyethylene and polyethylene thereof

A system and method of producing polyethylene, including: polymerizing ethylene in presence of a catalyst system in a reactor to form polyethylene, wherein the catalyst system includes a first catalyst and a second catalyst; and adjusting reactor conditions and an amount of the second catalyst fed to the reactor to control melt index (MI), density, and melt flow ratio (MFR) of the polyethylene.

Method of producing polyethylene and polyethylene thereof

A system and method of producing polyethylene, including: polymerizing ethylene in presence of a catalyst system in a reactor to form polyethylene, wherein the catalyst system includes a first catalyst and a second catalyst; and adjusting reactor conditions and an amount of the second catalyst fed to the reactor to control melt index (MI), density, and melt flow ratio (MFR) of the polyethylene.

Producing polyolefin products

Catalyst systems and methods for making and using the same are described. A method includes selecting a catalyst blend using a blend polydispersity index (bPDI) map. The polydispersity map is generated by generating a number of polymers for at least two catalysts. Each polymer is generated at a different hydrogen to ethylene ratio. At least one catalyst generates a higher molecular weight polymer and another catalyst generates a lower molecular weight polymer. A molecular weight for each polymer is measured. The relationship between the molecular weight of the polymers generated by each of the catalysts and the ratio of hydrogen to ethylene is determined. A family of bPDI curves for polymers that would be made using a number of ratios of a blend of the at least two catalysts for each of a number of ratios of hydrogen to ethylene. A ratio for the catalyst blend of the catalysts that generates a polymer having a bPDI that matches a polymer fabrication process is selected, and the product specific polyolefin is made using the catalyst blend.

Method of producing polyethylene and polyethylene thereof

A system and method of producing polyethylene, including: polymerizing ethylene in presence of a catalyst system in a reactor to form polyethylene, wherein the catalyst system includes a first catalyst and a second catalyst; and adjusting reactor conditions and an amount of the second catalyst fed to the reactor to control melt index (MI), density, and melt flow ratio (MFR) of the polyethylene.

Producing polyolefin products

Polymerization processes

Polymerization processes to produce polyolefin polymers, for example, polyethylene polymers, from catalyst systems comprising one or more olefin polymerization catalysts and at least one activator are provided. The polyolefin polymers may have a Broad Orthogonal Composition Distribution (BOCD).

Polymerization processes

Polymerization processes to produce polyolefin polymers, for example, polyethylene polymers, from catalyst systems comprising one or more olefin polymerization catalysts and at least one activator are provided. The polyolefin polymers may have a Broad Orthogonal Composition Distribution (BOCD).

Polymerization processes

Polymerization processes to produce polyolefin polymers, for example, polyethylene polymers, from catalyst systems comprising one or more olefin polymerization catalysts and at least one activator are provided. The polyolefin polymers may have a Broad Orthogonal Composition Distribution (BOCD).

Supported catalyst systems and processes for use thereof

This invention relates to a supported catalyst system comprising: (i) at least one first catalyst component comprising a group 4 metallocycle containing metallocene complex; (ii) at least one second catalyst component comprising a 2,6-bis(imino)pyridyl iron complex; (iii) activator; and (iv) support. The catalyst system may be used for preparing polyolefins, such a bimodal polyethylene, typically in a gas phase polymerization.

Bimodal polyethylene resins

A high density, high polydispersity polyethylene having improved properties, and a process of producing same.

High density polyethylene compositions with long-chain branching

Provided herein are polyethylene compositions having a combination of properties including: density from about 0.930 to 0.975 g/cm3; broad molecular weight distributions (Mw/Mn ≥ 10 and/or Mz/Mn ≥ 80) and a highly branched architecture (e.g., g'LCB less than or equal to 0.85, preferably less than or equal to 0.75). The polyethylene compositions may further have a low molecular weight fraction (LMWF) and a high molecular weight fraction (HMWF), such that the wt% of LMWF in the compositions is greater than the wt% of HMWF. The polyethylene compositions may be suitable for making films, particularly oriented films such as uni axially (machine-direction-oriented) or biaxi ally-oriented films, and in particular all-PE films.

Polymerization processes

Polymerization processes to produce polyolefin polymers, for example, polyethylene polymers, from catalyst systems comprising one or more olefin polymerization catalysts and at least one activator are provided. The polyolefin polymers may have a Broad Orthogonal Composition Distribution (BOCD).

Polymerization processes

Polymerization processes to produce polyolefin polymers, for example, polyethylene polymers, from catalyst systems comprising one or more olefin polymerization catalysts and at least one activator are provided. The polyolefin polymers may have a Broad Orthogonal Composition Distribution (BOCD).

Polymerization processes

Polymerization processes to produce polyolefin polymers, for example, polyethylene polymers, from catalyst systems comprising one or more olefin polymerization catalysts and at least one activator are provided. The polyolefin polymers may have a Broad Orthogonal Composition Distribution (BOCD).

Broad orthogonal distribution polyethylenes for films

A polyethylene comprising of ethylene derived units and 0.5 wt% to 10 wt% C 3 to C 12 α-olefin derived units may be synthesized using a mixed catalyst that comprises rac-dimethylsilylbis(tetrahydroindenyl)zirconium dichloride and a zirconium co-catalyst in a mole ratio of 50:50 to 90:10, and wherein the zirconium co-catalyst is a poor comonomer incorporator as compared to the rac-dimethylsilylbis(tetrahydroindenyl)zirconium dichloride catalyst. Such a polyethylene may have a density of 0.91 g/cm 3 to 0.93 g/cm 3 , an I 2 value of 0.5 g/10 min to 2 g/10 min, an I 21 value of 25 g/10 min to 75 g/10 min, an I 21 /I 2 ratio of 25 to 75, a molar reversed-co-monomer index (RCI,m) of 30 to 180, a phase angle equal or lower than 70° at complex modulus G* of 10,000 Pa, a Θ 2 of 1.5 radians to -1.5 radians, and a low density population of 50% and 70% by weight of the polyethylene.

(Di)silicon bridged metallocenes that produce polyethylene with broad molecular weight distribution and high molecular weight

This invention relates to catalyst systems comprising a catalyst compound having a bridged group 4 metal metallocene (where the bridge preferably contains an (Me2Si)2 group, an activator, and a support material. In some embodiments, the present disclosure provides for polyolefins and a process for producing a polyolefin composition comprising contacting at least one olefin with a catalyst system.

Polymerization catalysts with improved ethylene enchainment

Polymerization processes

Polymerization processes to produce polyolefin polymers, for example, polyethylene polymers, from catalyst systems comprising one or more olefin polymerization catalysts and at least one activator are provided. The polyolefin polymers may have a Broad Orthogonal Composition Distribution (BOCD).

Polymerization processes

Polymerization processes to produce polyolefin polymers, for example, polyethylene polymers, from catalyst systems comprising one or more olefin polymerization catalysts and at least one activator are provided. The polyolefin polymers may have a Broad Orthogonal Composition Distribution (BOCD).

Producing polyolefin products with improved stiffness, toughness, and processability

Polymers, and systems and methods for making and using the same are described herein. A polymer includes ethylene and at least one alpha olefin having from 4 to 20 carbon atoms. The polymer is formed by a trimmed catalyst system including a supported catalyst including bis(n-propylcyclopentadienyl) hafnium (R 1 )(R 2 ) and a trim catalyst comprising meso-O(SiMe 2 lnd) 2 Zr 2 (R 1 )(R 2 ), wherein R 1 and R 2 are each, independently, methyl, chloro, fluoro, or a hydrocarbyl group.

Producing polyolefin products with improved stiffness, toughness, and processability

The invention relates to a polymer, comprising ethylene and at least one alpha olefin having from 4 to 20 carbon atoms, wherein the polymer has: a peak in a first derivative of a van Gurp Palmen (vGP) plot at a frequency of between about 0.1 rad/s and 300 rad/s at 190 °C; a melt index ratio (MIR) greater than about 15; and a dart impact strength of greater than about 350 g/mil.

DISTRACTION DEVICE FOR THE UPPER PINE

Compact maxillary distractor

The present invention provides an improved orthopedic system for the modification of the distance between the maxilla and zygoma. In a preferred embodiment, the system includes first and second footplates attached to an orthopedic device. The second footplate is attached to the zygoma, with the first footplate being mechanically coupled to the maxilla. This mechanical coupling is achieved either through attachment directly to the maxilla or by attachment to a construct wired to the patient's teeth. The orthopedic device, which may be a distractor, allows for modification of the distance between the maxilla and zygoma. The entire system can advantageously be placed intra-orally within a patient. In a preferred embodiment, the device does not increase in length upon activation. In another preferred embodiment, the second footplate is offset, allowing the actuator to be placed under the zygoma. Methods for using this novel orthopedic system are also disclosed.

Distractor with removable footplates

A bone distractor assembly configured to distract first and second bone segments on opposite sides of a bone gap is provided. In one embodiment the distractor assembly includes a distractor having a first coupler and a second coupler, a first footplate releasably coupled to the first coupler, a second footplate releasably coupled to the second coupler, and a locking mechanism releasably coupling the first and second footplates to the first and second couplers. The first and second footplates releasably are each configured to attach to bone. The locking mechanism includes a tube, wherein removal of the tube releases the first and second footplates from the first and second couplers.

Polymerization processes

Polymerization processes to produce polyolefin polymers, for example, polyethylene polymers, from catalyst systems comprising one or more olefin polymerization catalysts and at least one activator are provided. The polyolefin polymers may have a Broad Orthogonal Composition Distribution (BOCD).

Producing polyolefin products

A polymerization catalyst system, a method of using the polymerization catalyst system, and a polymer produced with the catalyst system. The polymerization catalyst system has a non-metallocene catalyst and a metallocene catalyst. The metallocene catalyst has the formula: wherein R1 and R2 are each independently, phenyl, methyl, chloro, fluoro, or a hydrocarbyl group.

Pyridyldiamido Transition Metal Complexes, Production And Use Thereof

Pyridyldiamido transition metal complexes are disclosed for use in alkene polymerization. The ligands are tridentate with an NNN configuration. The general formula is: (I)

Pyridyldiamido transition metal complexes, production and use thereof

Pyridyldiamido transition metal complexes are disclosed for use in alkene polymerization. The ligands are tridentate with an NNN configuration. The general formula is: where M, Z, L n , L w ′, R 1 -R 5 , R 10 and R 11 are as defined in the specification.

Catalyst Compounds and Use Thereof

This invention relates to Group 4 catalyst compounds containing di-anionic tridentate nitrogen/oxygen based ligands. The catalyst compounds are useful, with or without activators, to polymerize olefins, particularly a-olefins, or other unsaturated monomers. Systems and processes to oligomerize and/or polymerize one or more unsaturated monomers using the catalyst compound, as well as the oligomers and/or polymers produced therefrom are also provided.

Catalyst Compounds and Use Thereof

This invention relates to Group 4 dialkyl compounds supported by a pyridyl-amido-aryl (“PAA”), an anisole-amido-aryl (“AAA”), a phenoxy-amido-pyridyl (“PAPY”), an anisole-amido-phenoxy (“AAP”) or a anisole-amido-phenoxy (“AAP”) tridentate ligand. Such compounds can polymerize olefins, such as ethylene.

Catalyst Compounds and Use Thereof

This invention relates to Group 4 catalyst compounds containing di-anionic tridentate nitrogen/oxygen based ligands. The catalyst compounds are useful, with or without activators, to polymerize olefins, particularly α-olefins, or other unsaturated monomers. Systems and processes to oligomerize and/or polymerize one or more unsaturated monomers using the catalyst compound, as well as the oligomers and/or polymers produced therefrom are also provided.

Catalyst Compounds and Use Thereof

This invention relates to Group 4 catalyst compounds containing di-anionic tridentate nitrogen/oxygen based ligands. The catalyst compounds are useful, with or without activators, to polymerize olefins, particularly a-olefins, or other unsaturated monomers. Systems and processes to oligomerize and/or polymerize one or more unsaturated monomers using the catalyst compound, as well as the oligomers and/or polymers produced therefrom are also provided.

Producing polyolefin products

Catalyst systems and methods for making and using the same are described. A method includes selecting a catalyst blend using a blend polydispersity index (bPDI) map. The polydispersity map is generated by generating a number of polymers for at least two catalysts. Each polymer is generated at a different hydrogen to ethylene ratio. At least one catalyst generates a higher molecular weight polymer and another catalyst generates a lower molecular weight polymer. A molecular weight for each polymer is measured. The relationship between the molecular weight of the polymers generated by each of the catalysts and the ratio of hydrogen to ethylene is determined. A family of bPDI curves for polymers that would be made using a number of ratios of a blend of the at least two catalysts for each of a number of ratios of hydrogen to ethylene. A ratio for the catalyst blend of the catalysts that generates a polymer having a bPDI that matches a polymer fabrication process is selected, and the product specific polyolefin is made using the catalyst blend.

Producing polyolefin products

Catalyst systems and methods for making and using the same are described. A method includes selecting a catalyst blend using a blend polydispersity index (bPDI) map. The polydispersity map is generated by generating a number of polymers for at least two catalysts. Each polymer is generated at a different hydrogen to ethylene ratio. At least one catalyst generates a higher molecular weight polymer and another catalyst generates a lower molecular weight polymer. A molecular weight for each polymer is measured. The relationship between the molecular weight of the polymers generated by each of the catalysts and the ratio of hydrogen to ethylene is determined. A family of bPDI curves for polymers that would be made using a number of ratios of a blend of the at least two catalysts for each of a number of ratios of hydrogen to ethylene. A ratio for the catalyst blend of the catalysts that generates a polymer having a bPDI that matches a polymer fabrication process is selected, and the product specific polyolefin is made using the catalyst blend.

Producing polyolefin products

Catalyst systems and methods for making and using the same are described. A method includes selecting a catalyst blend using a blend polydispersity index (bPDI) map. The polydispersity map is generated by generating a number of polymers for at least two catalysts. Each polymer is generated at a different hydrogen to ethylene ratio. At least one catalyst generates a higher molecular weight polymer and another catalyst generates a lower molecular weight polymer. A molecular weight for each polymer is measured. The relationship between the molecular weight of the polymers generated by each of the catalysts and the ratio of hydrogen to ethylene is determined. A family of bPDI curves for polymers that would be made using a number of ratios of a blend of the at least two catalysts for each of a number of ratios of hydrogen to ethylene. A ratio for the catalyst blend of the catalysts that generates a polymer having a bPDI that matches a polymer fabrication process is selected, and the product specific polyolefin is made using the catalyst blend.

Producing polyolefin products with improved stiffness, toughness, and processability

Polymers, and systems and methods for making and using the same are described herein. A polymer includes ethylene and at least one alpha olefin having from 4 to 20 carbon atoms. The polymer is formed by a trimmed catalyst system including a supported catalyst including bis(n-propylcyclopentadienyl) hafnium (R

Producing polyolefin products

Catalyst systems and methods for making and using the same are described. A method includes selecting a catalyst blend using a blend polydispersity index (bPDI) map. The polydispersity map is generated by generating a number of polymers for at least two catalysts. Each polymer is generated at a different hydrogen to ethylene ratio. At least one catalyst generates a higher molecular weight polymer and another catalyst generates a lower molecular weight polymer. A molecular weight for each polymer is measured. The relationship between the molecular weight of the polymers generated by each of the catalysts and the ratio of hydrogen to ethylene is determined. A family of bPDI curves for polymers that would be made using a number of ratios of a blend of the at least two catalysts for each of a number of ratios of hydrogen to ethylene. A ratio for the catalyst blend of the catalysts that generates a polymer having a bPDI that matches a polymer fabrication process is selected, and the product specific polyolefin is made using the catalyst blend.

Producing polyolefin products with improved stiffness, toughness, and processability

Polymers, and systems and methods for making and using the same are described herein. A polymer includes ethylene and at least one alpha olefin having from 4 to 20 carbon atoms. The polymer is formed by a trimmed catalyst system including a supported catalyst including bis(n-propylcyclopentadienyl) hafnium (R1)(R2) and a trim catalyst comprising meso-O(SiMe2Ind)2Zr(R1)(R2), wherein R1 and R2 are each, independently, methyl, chloro, fluoro, or a hydrocarbyl group.

Producing polyolefin products

Catalyst systems and methods for making and using the same are described. A method includes selecting a catalyst blend using a blend polydispersity index (bPDI) map. The polydispersity map is generated by generating a number of polymers for at least two catalysts. Each polymer is generated at a different hydrogen to ethylene ratio. At least one catalyst generates a higher molecular weight polymer and another catalyst generates a lower molecular weight polymer. A molecular weight for each polymer is measured. The relationship between the molecular weight of the polymers generated by each of the catalysts and the ratio of hydrogen to ethylene is determined. A family of bPDI curves for polymers that would be made using a number of ratios of a blend of the at least two catalysts for each of a number of ratios of hydrogen to ethylene. A ratio for the catalyst blend of the catalysts that generates a polymer having a bPDI that matches a polymer fabrication process is selected, and the product specific polyolefin is made using the catalyst blend.

Producing polyolefin products with improved stiffness, toughness, and processability

Polymers, and systems and methods for making and using the same are described herein. A polymer includes ethylene and at least one alpha olefin having from 4 to 20 carbon atoms. The polymer is formed by a trimmed catalyst system including a supported catalyst including bis(n-propylcyclopentadienyl) hafnium (R 1 )(R 2 ) and a trim catalyst comprising meso-O(SiMe 2 lnd) 2 Zr 2 (R 1 )(R 2 ), wherein R 1 and R 2 are each, independently, methyl, chloro, fluoro, or a hydrocarbyl group.

Producing polyolefin products

Catalyst systems and methods for making and using the same are described. A method includes selecting a catalyst blend using a blend polydispersity index (bPDI) map. The polydispersity map is generated by generating a number of polymers for at least two catalysts. Each polymer is generated at a different hydrogen to ethylene ratio. At least one catalyst generates a higher molecular weight polymer and another catalyst generates a lower molecular weight polymer. A molecular weight for each polymer is measured. The relationship between the molecular weight of the polymers generated by each of the catalysts and the ratio of hydrogen to ethylene is determined. A family of bPDI curves for polymers that would be made using a number of ratios of a blend of the at least two catalysts for each of a number of ratios of hydrogen to ethylene. A ratio for the catalyst blend of the catalysts that generates a polymer having a bPDI that matches a polymer fabrication process is selected, and the product specific polyolefin is made using the catalyst blend.

Producing polyolefin products

A method of making a product specific polyolefin, comprising: selecting a catalyst blend based, at least in part, on a polydispersity index (PDI) map, 5 wherein the polydispersity map is generated by: generating a plurality of polymers for at least two catalysts, wherein each polymer is generated at a different hydrogen to ethylene ratio, wherein one of the at least two catalysts generates a higher molecular weight polymer and another of the at least two catalysts generates a lower 10 molecular weight polymer; measuring the molecular weight for each polymer; determining the relationship between the molecular weight of the polymers generated by each of the at least two catalysts and the ratio of hydrogen to ethylene; and 15 generating a family of blend polydispersity index (bPDI) curves for polymers that would be made using a plurality of ratios of a blend of the at least two catalysts for each of a plurality of ratios of hydrogen to ethylene; and selecting a ratio for the catalyst blend of the at least two catalysts that generates 20 a polymer having a bpdi that matches a polymer fabrication process; and forming the product specific polyolefin using the catalyst blend.

Catalyst compounds and use thereof

Group 4 catalyst compounds containing di-anionic tridentate nitrogen/oxygen based ligands are provided. The catalyst compounds are useful, with or without activators, to polymerize olefins, particularly α-olefms, or other unsaturated monomers. Systems and processes to oligomerize and/or polymerize one or more unsaturated monomers using the catalyst compound, as well as the oligomers and/or polymers produced therefrom are also provided.

Catalyst compounds and use thereof

This invention relates to Group 4 dialkyl compounds supported by a pyridyl-amido-aryl (“PAA”), an anisole-amido-aryl (“AAA”), a phenoxy-amido-pyridyl (“PAPY”), an anisole-amido-phenoxy (“AAP”) or a anisole-amido-phenoxy (“AAP”) tridentate ligand. Such compounds can polymerize olefins, such as ethylene.

Catalyst compounds and use thereof

This invention relates to Group 4 catalyst compounds containing di-anionic tridentate nitrogen/oxygen based ligands. The catalyst compounds are useful, with or without activators, to polymerize olefins, particularly α-olefins, or other unsaturated monomers. Systems and processes to oligomerize and/or polymerize one or more unsaturated monomers using the catalyst compound, as well as the oligomers and/or polymers produced therefrom are also provided.

Catalyst compounds and use thereof

This invention relates to Group 4 catalyst compounds containing di-anionic tridentate nitrogen/oxygen based ligands. The catalyst compounds are useful, with or without activators, to polymerize olefins, particularly α-olefins, or other unsaturated monomers. Systems and processes to oligomerize and/or polymerize one or more unsaturated monomers using the catalyst compound, as well as the oligomers and/or polymers produced therefrom are also provided.

Bimodal polyethylene resins

Producing polyolefin products

Disclosed are polymerization catalysts for e.g. providing polymeric materials with an improved balance of stiffness, toughness and processibility. The polymerization catalysts includes a catalyst support, and first and second catalysts impregnated on the support. The first and second catalysts generate polymers having a slope for a plot of H2/C2 versus 1/Mw of about 1.0x10-6 to about 1.5 x10-6, and about 3.0x10-6 to about 4 x10-6, respectively. At a C6/C2 ratio of about 0.008 to about 0.012, the first catalyst generates a polymer having an MI of about 1.0 dg/10 min, a density of about 0.92 g/cc, and a melt index ratio (MIR) less than about 25. At a C6/C2 ratio of about 0.03 to about 0.04, the second catalyst generates a polymer having an MI of about 1.0 dg/10 min, a density of about 0.92 g/cc, and a MIR less than about 25.

Producing polyolefin products

At least two polymerization catalysts and a method of their selection using a blend polydispersity index (bPDI) map. Generate the bPDI map using polymers generated with the catalysts at a different hydrogen to ethylene ratios. At least one catalyst generates a higher molecular weight (MW) polymer and another catalyst generates a lower MW polymer. Determine the relationship between the MW of the polymers generated by each of the catalysts and the ratio of hydrogen to ethylene. Generate a family of bPDI curves for polymers that would be made using a number of ratios of a blend of the at least two catalysts for each of a number of ratios of hydrogen to ethylene. Select a ratio for the catalyst blend that generates a polymer having a bPDI that matches a polymer fabrication process and make the product specific polyolefin using the catalyst blend.

Producing polyolefin products

Producing polyethylene products with improved stiffness, toughness, and processability

The invention relates to a polymer, comprising ethylene and at least one alpha olefin having 4 carbon atoms, wherein the polymer has: a total haze of less than about 30 %; an average modulus of greater than about 30,000 psi; a dart impact strength of greater than about 120 g for a 1 mil film; a melt index ratio (MIR) greater than about 25; and an Elmendorf machine direction tear of greater than about 170 g at 1 mil film gauge.

Producing polyethylene products with improved stiffness, toughness, and processability

Producing polyolefin products

Catalyst systems and methods for making and using the same are described. A method includes selecting a catalyst blend using a blend polydispersity index (bPDI) map. The polydispersity map is generated by generating a number of polymers for at least two catalysts. Each polymer is generated at a different hydrogen to ethylene ratio. At least one catalyst generates a higher molecular weight polymer and another catalyst generates a lower molecular weight polymer. A molecular weight for each polymer is measured. The relationship between the molecular weight of the polymers generated by each of the catalysts and the ratio of hydrogen to ethylene is determined. A family of bPDI curves for polymers that would be made using a number of ratios of a blend of the at least two catalysts for each of a number of ratios of hydrogen to ethylene. A ratio for the catalyst blend of the catalysts that generates a polymer having a bPDI that matches a polymer fabrication process is selected, and the product specific polyolefin is made using the catalyst blend.

Method of producing polyethylene and polyethylene thereof

A system and method of producing polyethylene, including: polymerizing ethylene in presence of a catalyst system in a reactor to form polyethylene, wherein the catalyst system includes a first catalyst and a second catalyst; and adjusting reactor conditions and an amount of the second catalyst fed to the reactor to control melt index (MI), density, and melt flow ratio (MFR) of the polyethylene.

Producing polyolefin products with improved stiffness, toughness, and processability

Polymers, and systems and methods for making and using the same are described herein. A polymer includes ethylene and at least one alpha olefin having from 4 to 20 carbon atoms. The polymer has a melt index ratio (MIR) greater than about 40. The polymer also has a value for Mw1/Mw2 of at least about 2.0, wherein Mw1/Mw2 is a ratio of a weight average molecular weight (Mw) for a first half of a temperature rising elution (TREF) curve from a cross-fractionation (CFC) analysis to an Mw for a second half of the TREF curve. The polymer also has a value for Tw1−Tw2 of less than about −15° C., wherein Tw1−Tw2 is a difference of a weight average elution temperature (Tw) for the first half of the TREF curve to a Tw for the second half of the TREF curve.

Producing polyethylene products with improved stiffness, toughness, and processability

The invention relates to a polymer, comprising ethylene and at least one alpha olefin having from 4 to 20 carbon atoms, wherein the polymer has:an absence of a negative inflection point in a van Gurp Palmen (vGP) plot at a frequency of between about 0.1 rad/s and 300 rad/s at 190 °C;a melt index ratio (MIR) greater than about 40;a relationship between average modulus (M) and dart impact strength in g/mil (DIS) complying with the formula: DIS≥0.8x100+e11.71−0.000268xM+2.183x10−9xM2.

Producing polyolefin products with improved stiffness, toughness, and processability

POLYMER

produção de produtos de poliolefinas com rigidez, tenacidade e processabilidade melhoradas. polímeros e sistemas e métodos para preparar e utilizar os mesmos são aqui descritos. um polímero inclui etileno e pelo menos uma alfa olefina tendo de 4 a 20 átomos de carbono. o polímero é formado por um sistema de catalisador adequado incluindo um catalisador suportado incluindo bis (n-propilciclopentadienil) háfnio (r1) (r2) e um catalisador de adequação compreendendo meso-o(sime2ind)2zr2(r1)(r2), em que r1 e r2 são cada um, independentemente, metil, cloro, flúor ou um grupo hidrocarbila. production of polyolefin products with improved rigidity, toughness and processability. polymers and systems and methods for making and using them are described herein. a polymer includes ethylene and at least one alpha olefin having from 4 to 20 carbon atoms. the polymer is formed by a suitable catalyst system including a supported catalyst including bis(n-propylcyclopentadienyl) hafnium (r1) (r2) and a suitability catalyst comprising meso-o(sime2ind)2zr2(r1)(r2), wherein r1 and r2 are each, independently, methyl, chlorine, fluorine or a hydrocarbyl group.

Producing polyethylene products with improved stiffness, toughness, and processability

Polymers, and systems and methods for making and using the same are described herein. A polymer includes ethylene and at least one alpha olefin having from 4 to 20 carbon atoms. The polymer has a melt index ratio (MIR) greater than about 40. The polymer also has a value for Mw1/Mw2 of at least about 2.0, wherein Mw1/Mw2 is a ratio of a weight average molecular weight (Mw) for a first half of a temperature rising elution (TREF) curve from a cross-fractionation (CFC) analysis to an Mw for a second half of the TREF curve. The polymer also has a value for Tw1 - Tw2 of less than about -15 °C, wherein Tw1 - Tw2 is a difference of a weight average elution temperature (Tw) for the first half of the TREF curve to a Tw for the second half of the TREF curve.

polymer

PRODUÇÃO DE PRODUTOS DE POLIETILENO COM RIGIDEZ, TENACIDADE E PROCESSABILIDADE MELHORADAS. Polímeros e sistemas e métodos para preparar e utilizar os mesmos são aqui descritos. Um polímero inclui etileno e pelo menos uma alfa olefina tendo de 4 a 20 átomos de carbono. O polímero tem uma razão de índice de fusão (MIR) maior que cerca de 40. O polímero também tem um valor para Mw1/Mw2 de pelo menos cerca de 2,0, em que Mw1/Mw2 é uma razão de um peso molecular médio ponderal (Mw) para uma primeira metade de uma curva de eluição ascendente de temperatura (TREF) de uma análise de fracionamento cruzado (CFC) para um Mw para uma segunda metade da curva TREF. O polímero também tem um valor para Tw1 - Tw2 menor que cerca de -15 oC, em que Tw1 - Tw2 é uma diferença de uma temperatura de eluição média ponderal (Tw) para a primeira metade da curva TREF até uma Tw para a segunda metade da curva TREF. PRODUCTION OF POLYETHYLENE PRODUCTS WITH IMPROVED RIGIDITY, TENACITY AND PROCESSABILITY. Polymers and systems and methods for making and using them are described herein. A polymer includes ethylene and at least one alpha olefin having 4 to 20 carbon atoms. The polymer has a melt index ratio (MIR) greater than about 40. The polymer also has a value for Mw1/Mw2 of at least about 2.0, where Mw1/Mw2 is a ratio of an average molecular weight weight (Mw) for a first half of a temperature ascending elution curve (TREF) from a cross-fractionation (CFC) analysis for a Mw for a second half of the TREF curve. The polymer also has a value for Tw1 - Tw2 less than about -15 oC, where Tw1 - Tw2 is a difference of a weight average elution temperature (Tw) for the first half of the TREF curve to a Tw for the second half of the TREF curve.

Producing polyolefin products

Catalyst systems and methods for making and using the same are described. A method includes selecting a catalyst blend using a blend polydispersity index (bPDI) map. The polydispersity map is generated by generating a number of polymers for at least two catalysts. Each polymer is generated at a different hydrogen to ethylene ratio. At least one catalyst generates a higher molecular weight polymer and another catalyst generates a lower molecular weight polymer. A molecular weight for each polymer is measured. The relationship between the molecular weight of the polymers generated by each of the catalysts and the ratio of hydrogen to ethylene is determined. A family of bPDI curves for polymers that would be made using a number of ratios of a blend of the at least two catalysts for each of a number of ratios of hydrogen to ethylene. A ratio for the catalyst blend of the catalysts that generates a polymer having a bPDI that matches a polymer fabrication process is selected, and the product specific polyolefin is made using the catalyst blend.

Producing polyethylene products with improved stiffness, toughness, and processability

Polymers, and systems and methods for making and using the same are described herein. A polymer includes ethylene and at least one alpha olefin having from 4 to 20 carbon atoms. The polymer has a melt index ratio (MIR) greater than about 40. The polymer also has a value for Mw1/Mw2 of at least about 2.0, wherein Mw1/Mw2 is a ratio of a weight average molecular weight (Mw) for a first half of a temperature rising elution (TREF) curve from a cross-fractionation (CFC) analysis to an Mw for a second half of the TREF curve. The polymer also has a value for Tw1 - Tw2 of less than about -15 °C, wherein Tw1 - Tw2 is a difference of a weight average elution temperature (Tw) for the first half of the TREF curve to a Tw for the second half of the TREF curve.

Method of producing polyethylene and polyethylene thereof

A system and method of producing polyethylene, including: polymerizing ethylene in presence of a catalyst system in a reactor to form polyethylene, wherein the catalyst system includes a first catalyst and a second catalyst; and adjusting reactor conditions and an amount of the second catalyst fed to the reactor to control melt index (MI), density, and melt flow ratio (MFR) of the polyethylene.

Producing polyolefin products

A polymerization catalyst for forming a polyethylene copolymer, comprising: a catalyst support; a blend of at least two catalysts selected by: generating a plurality of polymers for the at least two catalysts, wherein each polymer is generated at a different hydrogen to ethylene ratio, wherein one of the at least two catalysts generates a polymer with a higher weight average molecular weight (hmw) and another of the at least two catalysts generates a polymer with a lower weight average molecular weight (mw), wherein the ratio of hmw to lmw is greater than about 5.0 at a weight average molecular weight of between about 30,000 and about 150,000; measuring the molecular weight for each polymer; determining the relationship between the molecular weight of the polymers generated by each of the at least two catalysts and the ratio of hydrogen to ethylene; generating a family of bPDI curves for polymers that would be made using a plurality of ratios of a blend of the at least two catalysts for each of a plurality of ratios of hydrogen to ethylene; and selecting a ratio for the catalyst blend of the at least two catalysts that generates a polymer having a bPDI that matches a polymer fabrication process.

Method of producing polyethylene and polyethylene thereof

A system and method of producing polyethylene, including: polymerizing ethylene in presence of a catalyst system in a reactor to form polyethylene, wherein the catalyst system includes a first catalyst and a second catalyst; and adjusting reactor conditions and an amount of the second catalyst fed to the reactor to control melt index (MI), density, and melt flow ratio (MFR) of the polyethylene.

Producing polyolefin products with improved stiffness, toughness, and processability

Polymers, and systems and methods for making and using the same are described herein. A polymer includes ethylene and at least one alpha olefin having from 4 to 20 carbon atoms. The polymer is formed by a trimmed catalyst system including a supported catalyst including bis(n-propylcyclopentadienyl) hafnium (R

Producing polyethylene products with improved stiffness, toughness, and processability

Polymers, and systems and methods for making and using the same are described herein. A polymer includes ethylene and at least one alpha olefin having from 4 to 20 carbon atoms. The polymer has a melt index ratio (MIR) greater than about 40. The polymer also has a value for Mw1/Mw2 of at least about 2.0, wherein Mw1/Mw2 is a ratio of a weight average molecular weight (Mw) for a first half of a temperature rising elution (TREF) curve from a cross-fractionation (CFC) analysis to an Mw for a second half of the TREF curve. The polymer also has a value for Tw1 - Tw2 of less than about -15 °C, wherein Tw1 - Tw2 is a difference of a weight average elution temperature (Tw) for the first half of the TREF curve to a Tw for the second half of the TREF curve.

Producing polyolefin products

A method of making a product specific polyolefin, comprising: selecting a catalyst blend based, at least in part, on a polydispersity index (PDI) map, 5 wherein the polydispersity map is generated by: generating a plurality of polymers for at least two catalysts, wherein each polymer is generated at a different hydrogen to ethylene ratio, wherein one of the at least two catalysts generates a higher molecular weight polymer and another of the at least two catalysts generates a lower 10 molecular weight polymer; measuring the molecular weight for each polymer; determining the relationship between the molecular weight of the polymers generated by each of the at least two catalysts and the ratio of hydrogen to ethylene; and 15 generating a family of blend polydispersity index (bPDI) curves for polymers that would be made using a plurality of ratios of a blend of the at least two catalysts for each of a plurality of ratios of hydrogen to ethylene; and selecting a ratio for the catalyst blend of the at least two catalysts that generates 20 a polymer having a bpdi that matches a polymer fabrication process; and forming the product specific polyolefin using the catalyst blend.

Producing polyethylene products with improved stiffness, toughness, and processability

Polymers, and systems and methods for making and using the same are described herein. A polymer includes ethylene and at least one alpha olefin having from 4 to 20 carbon atoms. The polymer has a melt index ratio (MIR) greater than about 40. The polymer also has a value for Mw1/Mw2 of at least about 2.0, wherein Mw1/Mw2 is a ratio of a weight average molecular weight (Mw) for a first half of a temperature rising elution (TREF) curve from a cross-fractionation (CFC) analysis to an Mw for a second half of the TREF curve. The polymer also has a value for Tw1 - Tw2 of less than about -15 °C, wherein Tw1 - Tw2 is a difference of a weight average elution temperature (Tw) for the first half of the TREF curve to a Tw for the second half of the TREF curve.

Producing polyolefin products

Catalyst systems and methods for making and using the same are described. A method includes selecting a catalyst blend using a blend polydispersity index (bPDI) map. The polydispersity map is generated by generating a number of polymers for at least two catalysts. Each polymer is generated at a different hydrogen to ethylene ratio. At least one catalyst generates a higher molecular weight polymer and another catalyst generates a lower molecular weight polymer. A molecular weight for each polymer is measured. The relationship between the molecular weight of the polymers generated by each of the catalysts and the ratio of hydrogen to ethylene is determined. A family of bPDI curves for polymers that would be made using a number of ratios of a blend of the at least two catalysts for each of a number of ratios of hydrogen to ethylene. A ratio for the catalyst blend of the catalysts that generates a polymer having a bPDI that matches a polymer fabrication process is selected, and the product specific polyolefin is made using the catalyst blend.

Producing polyolefin products

A polymerization catalyst for forming a polyethylene copolymer, comprising: a catalyst support; a blend of at least two catalysts selected by: generating a plurality of polymers for the at least two catalysts, wherein each polymer is generated at a different hydrogen to ethylene ratio, wherein one of the at least two catalysts generates a polymer with a higher weight average molecular weight (hmw) and another of the at least two catalysts generates a polymer with a lower weight average molecular weight (mw), wherein the ratio of hmw to lmw is greater than about 5.0 at a weight average molecular weight of between about 30,000 and about 150,000; measuring the molecular weight for each polymer; determining the relationship between the molecular weight of the polymers generated by each of the at least two catalysts and the ratio of hydrogen to ethylene; generating a family of bPDI curves for polymers that would be made using a plurality of ratios of a blend of the at least two catalysts for each of a plurality of ratios of hydrogen to ethylene; and selecting a ratio for the catalyst blend of the at least two catalysts that generates a polymer having a bPDI that matches a polymer fabrication process.

Method of producing polyethylene and polyethylene thereof

A system and method of producing polyethylene, including: polymerizing ethylene in presence of a catalyst system in a reactor to form polyethylene, wherein the catalyst system includes a first catalyst and a second catalyst; and adjusting reactor conditions and an amount of the second catalyst fed to the reactor to control melt index (MI), density, and melt flow ratio (MFR) of the polyethylene.

Producing polyolefin products with improved stiffness, toughness, and processability

Polymers, and systems and methods for making and using the same are described herein. A polymer includes ethylene and at least one alpha olefin having from 4 to 20 carbon atoms. The polymer is formed by a trimmed catalyst system including a supported catalyst including bis(n-propylcyclopentadienyl) hafnium (R 1 )(R 2 ) and a trim catalyst comprising meso-O(SiMe 2 lnd) 2 Zr 2 (R 1 )(R 2 ), wherein R 1 and R 2 are each, independently, methyl, chloro, fluoro, or a hydrocarbyl group.

Producing polyolefin products

Catalyst systems and methods for making and using the same are described. A method includes selecting a catalyst blend using a blend polydispersity index (bPDI) map. The polydispersity map is generated by generating a number of polymers for at least two catalysts. Each polymer is generated at a different hydrogen to ethylene ratio. At least one catalyst generates a higher molecular weight polymer and another catalyst generates a lower molecular weight polymer. A molecular weight for each polymer is measured. The relationship between the molecular weight of the polymers generated by each of the catalysts and the ratio of hydrogen to ethylene is determined. A family of bPDI curves for polymers that would be made using a number of ratios of a blend of the at least two catalysts for each of a number of ratios of hydrogen to ethylene. A ratio for the catalyst blend of the catalysts that generates a polymer having a bPDI that matches a polymer fabrication process is selected, and the product specific polyolefin is made using the catalyst blend.

Producing polyolefin products

At least two polymerization catalysts and a method of their selection using a blend polydispersity index (bPDI) map. Generate the bPDI map using polymers generated with the catalysts at a different hydrogen to ethylene ratios. At least one catalyst generates a higher molecular weight (MW) polymer and another catalyst generates a lower MW polymer. Determine the relationship between the MW of the polymers generated by each of the catalysts and the ratio of hydrogen to ethylene. Generate a family of bPDI curves for polymers that would be made using a number of ratios of a blend of the at least two catalysts for each of a number of ratios of hydrogen to ethylene. Select a ratio for the catalyst blend that generates a polymer having a bPDI that matches a polymer fabrication process and make the product specific polyolefin using the catalyst blend.

(di)silicon bridged metallocenes that produce polyethylene broad molecular weight distribution and molecular weight

This invention relates to catalyst systems comprising a catalyst compound having a bridged group 4 metal metallocene (where the bridge preferably contains an (Me2Si)2 group, an activator, and a support material. In some embodiments, the present disclosure provides for polyolefins and a process for producing a polyolefin composition comprising contacting at least one olefin with a catalyst system.

Catalyst compounds and use thereof

This invention relates to Group 4 catalyst compounds containing di-anionic tridentate nitrogen/oxygen based ligands. The catalyst compounds are useful, with or without activators, to polymerize olefins, particularly α-olefms, or other unsaturated monomers. Systems and processes to oligomerize and/or polymerize one or more unsaturated monomers using the catalyst compound, as well as the oligomers and/or polymers produced therefrom are also provided.

Catalyst compounds and use thereof

This invention relates to Group 4 catalyst compounds containing di-anionic tridentate nitrogen/oxygen based ligands. The catalyst compounds are useful, with or without activators, to polymerize olefins, particularly α-olefms, or other unsaturated monomers. Systems and processes to oligomerize and/or polymerize one or more unsaturated monomers using the catalyst compound, as well as the oligomers and/or polymers produced therefrom are also provided.