Patents by Inventor Zengquan Qin

Zengquan Qin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Bulk Polymerization Process For Producing Polydienes
    Publication number: 20140378630
    Abstract: A process for preparing a polydiene, the process comprising the steps of: polymerizing conjugated diene monomer with a metallocene complex catalyst system within a polymerization mixture that includes less than 20% by weight of solvent based on the total weight of the polymerization mixture, where the metallocene complex catalyst system includes the combination or reaction product of: (a) metallocene complex, (b) an alkylating agent, and optionally (c) a non-coordinating anion.
    Type: Application
    Filed: December 27, 2012
    Publication date: December 25, 2014
    Applicant: Bridgestone Corporation
    Inventors: Kevin M. McCauley, Zengquan Qin, Joshua S. Dickstein, Steven Luo
  • Hydroxyaryl functionalized polymers
    Patent number: 8871871
    Abstract: Vulcanizates with desirable properties can be obtained from compounds incorporating polymers that include hydroxyl group-containing aryl functionalities. The functionalities can be incorporated by using any or all of appropriate initiators, monomers and optional terminating compounds. Such polymers exhibit excellent interactivity with both conventional and non-conventional fillers.
    Type: Grant
    Filed: December 28, 2008
    Date of Patent: October 28, 2014
    Assignee: Bridgestone Corporation
    Inventors: Xiao-Dong Pan, Zengquan Qin, Yuan-Yong Yan, Dennis R. Brumbaugh, Jason T. Poulton
  • NICKEL-BASED CATALYST COMPOSITION
    Publication number: 20140316086
    Abstract: In general the present invention provides a process for forming conjugated diene polymer, the process comprising the step of polymerizing conjugated diene monomer in the presence of a catalytically effective amount of a catalyst composition formed by combining (a) a nickel-containing compound, (b) an alkylating agent, (c) a fluorine-containing compound, (d) a carboxylic acid, and (e) an alcohol.
    Type: Application
    Filed: June 30, 2014
    Publication date: October 23, 2014
    Inventors: Zengquan QIN, Jason T. POULTON, David M. ROGGEMAN, Shigeaki MATSUO
  • PROCESS FOR PREPARATION OF CYCLIC AND ACYCLIC DIENE COPOLYMER AND RUBBER COMPOSITION
    Publication number: 20140288250
    Abstract: A process for preparing a copolymer of an acyclic conjugated diene and a cyclic conjugated diene using a polymerization catalyst system comprising a transition metal compound or a lanthanide metal compound, an alkylating agent, and an inorganic halide alcoholate, and rubber compositions and tires comprising the same.
    Type: Application
    Filed: March 24, 2014
    Publication date: September 25, 2014
    Inventors: Zengquan Qin, Eiju Suzuki
  • Polymers functionalized with hydroxyl group-containing diphenylethylene
    Patent number: 8765888
    Abstract: Vulcanizates with desirable properties can be obtained from compounds incorporating polymers that include hydroxyl group-containing diphenylethylene-type functionalities. The functionalities can be incorporated by using any or all of appropriate initiators, monomers and optional terminating compounds. Such polymers exhibit excellent interactivity with both conventional and non-conventional fillers.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: July 1, 2014
    Assignee: Bridgestone Corporation
    Inventors: Zengquan Qin, Yuan-Yong Yan, Xiao-Dong Pan
  • Processes for preparation of cyclic and acyclic diene copolymer and rubber composition
    Patent number: 8701728
    Abstract: A process for preparing a copolymer of an acyclic conjugated diene and a cyclic conjugated diene using a polymerization catalyst system comprising a transition metal compound or a lanthanide metal compound, an alkylating agent, and an inorganic halide alcoholate, and rubber compositions and tires comprising the same. The copolymer contains at least 90% acyclic conjugated diene monomer, has a number average molecular weight of between 40,000 and 300,000, and has a cis-bond content of at least 92%.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: April 22, 2014
    Assignee: Bridgestone Corporation
    Inventors: Zengquan Qin, Eiju Suzuki
  • Processes For The Preparation Of High-Cis Polydienes
    Publication number: 20140073751
    Abstract: The present disclosure is directed towards a solution or bulk polymerization process for preparing high-cis polydienes that utilizes at least one vinyl aromatic compound as a molecular weight regulator. The disclosed solution or bulk polymerization processes are useful for preparing high-cis polydienes with a Mooney viscosity between 30 and 55 while allowing the use of lower amounts of catalyst.
    Type: Application
    Filed: May 8, 2012
    Publication date: March 13, 2014
    Inventor: Zengquan Qin
  • Catalysts for preparing cis 1,4-polydienes
    Patent number: 8664343
    Abstract: A polymerization catalyst composition for preparing cis 1,4-polydienes is provided. The catalyst composition comprises (a) a metal-containing compound, said metal being a transition metal or a lanthanide metal; (b) a carbene, (c) an alkylating agent, and optionally (d) a halogen-containing compound with the proviso that the halogen-containing compound must be present when none of the metal-containing compound and the alkylating agent contain a labile halogen atom. Also provided is a process for producing a polydiene comprising reacting a conjugated diene in the presence of the polymerization catalyst composition.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: March 4, 2014
    Assignee: Bridgestone Corporation
    Inventors: Zengquan Qin, Jason T. Poulton
  • Lanthanide Complex Catalyst And Polymerization Method Employing Same
    Publication number: 20140039126
    Abstract: A novel class of lanthanide metal salen complexes can be used as an ingredient of a catalyst system. The catalyst system can be used in polymerizations of ethylenically unsaturated hydrocarbon monomers.
    Type: Application
    Filed: February 5, 2012
    Publication date: February 6, 2014
    Applicant: Bridgestone Corporation
    Inventors: Zengquan Qin, Steven Luo, Joshua S. Dickstein
  • Metal Complex Catalysts And Polymerization Methods Employing Same
    Publication number: 20140031502
    Abstract: A novel class of aminidate complexes can be used as an ingredient of a catalyst system. The catalyst system can be used in polymerizations of ethylenically unsaturated hydrocarbon monomers.
    Type: Application
    Filed: February 5, 2012
    Publication date: January 30, 2014
    Applicant: Bridgestone Corporation
    Inventors: Zengquan Qin, Steven Luo
  • Lanthanide Complex Catalyst And Polymerization Method Employing Same
    Publication number: 20140031503
    Abstract: A novel class of lanthanide metal phenoxyimine complexes can be used as an ingredient of a catalyst system. The catalyst system can be used in polymerizations of ethylenically unsaturated hydrocarbon monomers.
    Type: Application
    Filed: February 5, 2012
    Publication date: January 30, 2014
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Zengquan Qin, Steven Luo, Joshua S. Dickstein
  • Processing of rubber compositions including siliceous fillers
    Patent number: 8637600
    Abstract: Vulcanizates with desirable properties can be obtained from compositions incorporating polymers that include hydroxyl group-containing aryl functionalities, silica or other particulate filler(s) that contain or include oxides of silicon and a compound that includes multiple hydroxyl groups. The compound can act to disrupt the interactivity of the functionalities and the particulate filler particles during processing of the composition, thereby facilitating processing of the composition.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: January 28, 2014
    Assignee: Bridgestone Corporation
    Inventors: Xiao-Dong Pan, Zengquan Qin, Yuan-Yong Yan, Jessica Kurasch
  • Method of making hydroxyaryl-functionalized interpolymer
    Patent number: 8440755
    Abstract: Cationic techniques can be used to polymerize monomers that include a class of hydroxyaryl compounds so as to provide polymers that exhibit desirable properties including, but not limited to, reduced hysteresis. Compositions such as vulcanizates in which such polymers can be utilized and products such as tire components that incorporate and/or are manufactured from such compositions also are provided.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: May 14, 2013
    Assignee: Bridgestone Corporation
    Inventors: Zengquan Qin, Yuan-Yong Yan, Xiao-Dong Pan
  • HYDROXYL GROUP-CONTAINING METHYLSTYRENE AND POLYMERS INCORPORATING SAME
    Publication number: 20130090423
    Abstract: Vulcanizates with desirable properties can be obtained from compounds incorporating polymers that include hydroxyl group-containing ?-methylstyrene functionalities. The functionalities can be incorporated by using any or all of appropriate initiators, monomers and optional terminating compounds. Such polymers exhibit excellent interactivity with both conventional and non-conventional fillers.
    Type: Application
    Filed: May 28, 2011
    Publication date: April 11, 2013
    Inventors: Zengquan Qin, Yuan-Yong Yan, Xiao-Dong Pan
  • Nickel-based catalyst composition
    Patent number: 8372925
    Abstract: In general the present invention provides a process for forming conjugated diene polymer, the process comprising the step of polymerizing conjugated diene monomer in the presence of a catalytically effective amount of a catalyst composition formed by combining (a) a nickel-containing compound, (b) an alkylating agent, (c) a fluorine-containing compound, (d) a carboxylic acid, and (e) an alcohol.
    Type: Grant
    Filed: April 7, 2008
    Date of Patent: February 12, 2013
    Assignee: Bridgestone Corporation
    Inventors: Zengquan Qin, Jason T. Poulton, David M. Roggeman, Shigeaki Matsuo
  • RUBBER COMPOSITIONS INCLUDING SILICEOUS FILLERS
    Publication number: 20130035437
    Abstract: Vulcanizates with desirable properties can be obtained from compositions incorporating polymers that include hydroxyl group-containing aryl functionalities, silica or other particulate filler(s) that contain or include oxides of silicon and a group or compound that can act to covalently bond the filler particles and the polymer. The group can be provided as a substituent of the filler particle, or a discreet compound can be provided in the composition.
    Type: Application
    Filed: February 28, 2011
    Publication date: February 7, 2013
    Inventors: Xiao-Dong Pan, Yuan-Yong Yan, Zengquan Qin
  • PROCESSES FOR PREPARATION OF CYCLIC AND ACYCLIC DIENE COPOLYMER AND RUBBER COMPOSITION
    Publication number: 20120255661
    Abstract: A process for preparing a copolymer of an acyclic conjugated diene and a cyclic conjugated diene using a polymerization catalyst system comprising a transition metal compound or a lanthanide metal compound, an alkylating agent, and an inorganic halide alcoholate, and rubber compositions and tires comprising the same. The copolymer contains at least 90% acyclic conjugated diene monomer, has a number average molecular weight of between 40,000 and 300,000, and has a cis-bond content of at least 92%.
    Type: Application
    Filed: October 13, 2010
    Publication date: October 11, 2012
    Inventors: Zengquan Qin, Eiju Suzuki
  • Polycarbonates made using highly selective catalysts
    Patent number: 8278239
    Abstract: Poly(propylene carbonates) are prepared from propylene oxide and CO2 with less than 10% cyclic propylene carbonate by product using cobalt based catalysts of structure preferably in combination with salt cocatalyst, very preferably cocatalyst where the cation is PPN+ and the anion is Cl? or OBzF5?. Novel products include poly(propylene carbonates) having a stereoregularity greater than 90% and/or a regioregularity of greater than 90%.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: October 2, 2012
    Assignee: Cornell Research Foundation, Inc.
    Inventors: Geoffrey W. Coates, Zengquan Qin, Claire Tova Cohen
  • PROCESS FOR PRODUCING POLYDIENES
    Publication number: 20120196995
    Abstract: A process for preparing a polydiene, the process comprising the step of: polymerizing conjugated diene monomer in the presence of a (hydrocarbyloxyhydrocarbyl)amine, where said step of polymerizing employs a lanthanide-based catalyst system.
    Type: Application
    Filed: January 31, 2012
    Publication date: August 2, 2012
    Inventors: Zengquan QIN, Jason T. POULTON
  • ANIONIC POLYMERIZATION INITIATORS AND PROCESSES
    Publication number: 20120136128
    Abstract: A group of compounds defined by the general formula (I) can be used to anionically initiate polymerization of unsaturated monomers. In the formula, M is an alkali metal atom, R1 is an aryl group having at least one OR2 substituent group where each R2 is a group that is nonreactive toward M, and R is a hydrocarbyl group. The subject initiators can be used in semi-batch and continuous polymerization processes, even those which are performed at elevated temperatures.
    Type: Application
    Filed: June 28, 2010
    Publication date: May 31, 2012
    Inventors: Yuan-Yong Yan, Zengquan Qin, Xiao-Dong Pan, David M. Roggeman