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US Patent 12122857 Controlling long-chain branch content with dual activator-supports

Patent 12122857 was granted and assigned to Chevron Phillips Chemical Company on October, 2024 by the United States Patent and Trademark Office.

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 US Patent 12122857 Controlling long-chain branch content with dual activator-supports

Article

Patent abstract

Methods for controlling the long chain branch content of ethylene homopolymers and copolymers produced in a polymerization process include the steps of contacting a metallocene compound, an organoaluminum compound, a high LCB activator-support, and a low LCB activator-support to form a catalyst composition, contacting the catalyst composition with ethylene and an optional olefin comonomer in a polymerization reactor system under polymerization conditions to produce an ethylene polymer having a LCB content, and controlling the relative amount of the high LCB activator-support and the low LCB activator-support in the catalyst composition to adjust the LCB content of the ethylene polymer.

Infobox
Is a
Patent
Patent
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Patent Applicant
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Chevron Phillips Chemical Company
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Current Assignee
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Chevron Phillips Chemical Company
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Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
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Patent Number
121228570
Patent Inventor Names
Carlos A. Cruz0
Graham R. Lief0
Jared Barr0
Max P. McDaniel0
Qing Yang0
Yongwoo Inn0
Date of Patent
October 22, 2024
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Patent Application Number
175524510
Date Filed
December 16, 2021
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Patent Citations
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US Patent 7101936 Olefin polymerization process to produce branched polymer compositions
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US Patent 7199073 Resins that yield low haze films and the process for their production
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US Patent 7226886 Polymerization catalysts and process for producing bimodal polymers in a single reactor
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US Patent 7294599 Acidic activator-supports and catalysts for olefin polymerization
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US Patent 7312283 Polymerization catalysts and process for producing bimodal polymers in a single reactor
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US Patent 7456243 Catalyst compositions and polyolefins for extrusion coating applications
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US Patent 7517939 Polymerization catalysts for producing high molecular weight polymers with low levels of long chain branching
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US Patent 7531606 Method for operating a gas phase polymerization reactor
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US Patent 7576163 Polymerization catalysts for producing polymers with low levels of long chain branching
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US Patent 7598327 Method for polymerizing olefins in a gas phase reactor using a seedbed during start-up
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US Patent 7601665 Compositions that can produce polymers
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US Patent 7619047 Dual metallocene catalysts for polymerization of bimodal polymers
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US Patent 7652160 Polymerization catalysts for producing high molecular weight polymers with low levels of long chain branching
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US Patent 7732542 Polymerization catalysts for producing high molecular weight polymers with low levels of long chain branching
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US Patent 7842763 Catalyst compositions and polyolefins for extrusion coating applications
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US Patent 7884163 Silica-coated alumina activator-supports for metallocene catalyst compositions
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US Patent 7919639 Nano-linked heteronuclear metallocene catalyst compositions and their polymer products
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US Patent 7960487 Dual metallocene catalysts for polymerization of bimodal polymers
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US Patent 8030241 Catalyst compositions and polyolefins for extrusion coating applications
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US Patent 8080681 Nano-linked metallocene catalyst compositions and their polymer products
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US Patent 8138113 Dual metallocene catalysts for polymerization of bimodal polymers
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US Patent 8268944 Dual metallocene catalysts for polymerization of bimodal polymers
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US Patent 8309485 Methods for producing metal-containing sulfated activator-supports
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US Patent 8426538 Catalyst compositions and polyolefins for extrusion coating applications
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US Patent 11198747 Catalyst systems including two hafnocene catalyst compounds
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US Patent 8623973 Activator supports impregnated with group VIII transition metals for polymer property control
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US Patent 8703886 Dual activator-support catalyst systems
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US Patent 8957168 Methods for controlling dual catalyst olefin polymerizations with an alcohol compound
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US Patent 9006367 Low density polyolefin resins and films made therefrom
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US Patent 9023959 Methods for producing fluorided-chlorided silica-coated alumina activator-supports and catalyst systems containing the same
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US Patent 11208514 Silica-coated alumina activator-supports for metallocene catalyst compositions
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US Patent 9163098 Processes for preparing metallocene-based catalyst systems
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US Patent 9181369 Polymer films having improved heat sealing properties
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US Patent 9181370 Low density polyolefin resins with low molecular weight and high molecular weight components, and films made therefrom
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US Patent 9273170 Polymers with improved toughness and ESCR for large-part blow molding applications
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US Patent 9303109 Catalyst systems containing boron-bridged cyclopentadienyl-fluorenyl metallocene compounds with an alkenyl substituent
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US Patent 9346896 Silica-coated alumina activator-supports for metallocene catalyst compositions
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US Patent 9365667 Methods for producing fluorided-chlorided silica-coated alumina activator-supports and catalyst systems containing the same
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US Patent 9441063 Titanium phosphinimide and titanium iminoimidazolidide catalyst systems with activator-supports
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US Patent 9481749 Processes for preparing metallocene-based catalyst systems in cyclohexene
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US Patent 9670296 Silica-coated alumina activator-supports for metallocene catalyst compositions
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US Patent 9856339 Polyethylenes with increased molecular weight distribution
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US Patent 9975976 Polyethylene compositions and methods of making and using same
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US Patent 10239975 Silica-coated alumina activator-supports for metallocene catalyst compositions
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US Patent 10513572 Process control for long chain branching control in polyethylene production
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US Patent 10538604 Catalysts for control of long chain branching
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US Patent 10604604 Multimodal polyolefin resin, and molded body manufactured therefrom
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US Patent 10676553 Silica-coated alumina activator-supports for metallocene catalyst compositions
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US Patent 10723819 Supported catalyst systems and processes for use thereof
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US Patent 10808053 Polyethylene compositions and articles made therefrom
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US Patent 10913808 Mixed catalysts with unbridged hafnocenes with -CH2-SiMe3 moieties
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US Patent 10919996 Silica-coated alumina activator-supports for metallocene catalyst compositions
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US Patent 10927202 Polyethylene compositions and articles made therefrom
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US Patent 10927203 Polyethylene compositions and articles made therefrom
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US Patent 10927205 Polymerization processes and polymers made therefrom
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US Patent 10954321 High-density ethylene-based polymer using supported hybrid metallocene catalyst, and manufacturing method therefor
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US Patent 11014997 Dual catalyst system for producing high density polyethylenes with long chain branching
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US Patent 11267919 Dual catalyst system for producing polyethylene with long chain branching for blow molding applications
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US Patent 11274171 Dual catalyst composition
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US Patent 11274196 Polyethylene compositions and films prepared therefrom
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US Patent 11339279 Dual catalyst system for producing LLDPE and MDPE copolymers with long chain branching for film applications
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US Patent 11787881 Polyethylene compositions and films prepared therefrom
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US Patent 7026494 Polymerization catalysts for producing high melt index polymers without the use of hydrogen
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US Patent 7041617 Catalyst compositions and polyolefins for extrusion coating applications
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Patent Primary Examiner
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Caixia Lu
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CPC Code
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C08F 4/65916
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C08L 23/0815
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C08F 210/16
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