Patents by Inventor Yu Feng Wang

Yu Feng Wang 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).

  • Patent number: 8796408
    Abstract: The present invention relates to a process of forming a polymer, the process comprising polymerizing olefin monomers to form a reaction mixture, treating the reaction mixture to form a first polymer-rich phase, treating the first polymer-rich phase to form a second polymer-rich phase, and devolatilizing the second polymer-rich phase, the process further comprising at least one step of adjusting the temperature of a first and/or the second polymer-rich phase before the devolatilization. The present invention also relates to a plant that is useful for the process provided above.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: August 5, 2014
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventor: Yu Feng Wang
  • Publication number: 20140066586
    Abstract: The present invention relates to a process of forming a polymer, the process comprising polymerizing olefin monomers to form a reaction mixture, treating the reaction mixture to form a first polymer-rich phase, treating the first polymer-rich phase to form a second polymer-rich phase, and devolatilizing the second polymer-rich phase, the process further comprising at least one step of adjusting the temperature of a first and/or the second polymer-rich phase before the devolatilization. The present invention also relates to a plant that is useful for the process provided above.
    Type: Application
    Filed: August 31, 2012
    Publication date: March 6, 2014
    Inventor: Yu Feng Wang
  • Patent number: 8524859
    Abstract: In the production of isobutylene-based elastomers the product obtained from the polymerization process is often in the form of a stream. Described herein are an apparatus and a process for removal of hydrocarbon liquids from the elastomer. The process comprises the steps of obtaining a stream comprising hydrocarbon liquids, either solvents or diluents, and an isobutylene-based elastomer; passing the stream through a kneader to volatize the hydrocarbon liquids from the elastomer.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: September 3, 2013
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Yu Feng Wang, Richard C-M Yeh
  • Publication number: 20120071619
    Abstract: In the production of isobutylene-based elastomers the product obtained from the polymerization process is often in the form of a stream. Described herein are an apparatus and a process for removal of hydrocarbon liquids from the elastomer. The process comprises the steps of obtaining a stream comprising hydrocarbon liquids, either solvents or diluents, and an isobutylene-based elastomer; passing the stream through a kneader to volatize the hydrocarbon liquids from the elastomer.
    Type: Application
    Filed: March 23, 2011
    Publication date: March 22, 2012
    Inventors: Yu Feng WANG, Richard C-M Yeh
  • Publication number: 20110162751
    Abstract: Provided are coated petrochemical and chemical industry devices and methods of making and using such coated devices. In one form, the coated petrochemical and chemical industry device includes a petrochemical and chemical industry device including one or more bodies, and a coating on at least a portion of the one or more bodies, wherein the coating is chosen from an amorphous alloy, a heat-treated electroless or electro plated based nickel-phosphorous composite with a phosphorous content greater than 12 wt %, graphite, MoS2, WS2, a fullerene based composite, a boride based cermet, a quasicrystalline material, a diamond based material, diamond-like-carbon (DLC), boron nitride, and combinations thereof. The coated petrochemical and chemical industry devices may provide for reduced friction, wear, corrosion and other properties required for superior performance.
    Type: Application
    Filed: December 1, 2010
    Publication date: July 7, 2011
    Applicant: ExxonMobil Research and Engineering Company
    Inventors: Brian Joseph Fitzgerald, Hyun-Woo Jin, Raghavan Ayer, Yu Feng Wang
  • Patent number: 7858735
    Abstract: In the production of elastomers the product obtained from the polymerization process is often in the form of a slurry. Described herein are an apparatus and a process for “finishing” the elastomer, i.e., dewatering and drying the elastomer. The process comprises the steps of obtaining a slurry comprising water and elastomer; passing the slurry through a first dewatering device to produce a wet elastomer crumb, wherein the first dewatering device comprises two dewatering extruders in parallel; passing the wet elastomer crumb through a second dewatering device; and then passing the wet elastomer crumb through a drying device to produce a dried elastomer crumb.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: December 28, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Richard C. Yeh, Yu Feng Wang, Jean-Paul Swoboda, Oscar K. Broussard, III
  • Publication number: 20100305301
    Abstract: In the production of elastomers the product obtained from the polymerization process is often in the form of a slurry. Described herein are an apparatus and a process for “finishing” the elastomer, i.e., dewatering and drying the elastomer. The process comprises the steps of obtaining a slurry comprising water and elastomer; passing the slurry through a first dewatering device to produce a wet elastomer crumb, wherein the first dewatering device comprises two dewatering extruders in parallel; passing the wet elastomer crumb through a second dewatering device; and then passing the wet elastomer crumb through a drying device to produce a dried elastomer crumb.
    Type: Application
    Filed: May 29, 2009
    Publication date: December 2, 2010
    Inventors: Richard C. Yeh, Yu Feng Wang, Jean-Paul Swoboda, Oscar K. Broussard, III
  • Patent number: 6630538
    Abstract: Thermoplastic elastomer compositions having improved processabillity while maintaining good physical properties are prepared from a mixture of olefinic rubber and a polypropylene composition having a melt flow rate in the range of from about 0.5 to about 5 dg/min. and a molecular weight distribution Mw/Mn of greater than 5.5 up to about 20. The rubber component of the mixture may be at least partially cured by dynamic vulcanization.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: October 7, 2003
    Inventors: Maria D. Ellul, Prasadarao Meka, Kang-Bo Wang, Yu-Feng Wang
  • Patent number: 6545101
    Abstract: Polyisobutylene (PIB) functionalized with terminal reactive unsaturation is disclosed. Carbocationically polymerized monohalogen-terminated PIB is dehydrohalogenated in a hydrocarbon solvent using an alkoxide of the formula RO-M wherein R is alkyl of at least 5 carbon atoms and M is alkali metal. The PIB obtained has terminal unsaturation which is 100% in the reactive ‘exo’ form which can be converted to succinic anhydride groups (PIB-SA) by the ene reaction with maleic anhydride. The PIB-SA is reactive with amine functional dendrimers to obtain a star-branched polymer having a dendrimer core and PIB branches joined by succinimide linkages. Blends of the star-branched polymer with polypropylene have improved energy absorption properties and controllable moisture/oxygen permeabilities useful in films.
    Type: Grant
    Filed: February 6, 2001
    Date of Patent: April 8, 2003
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Pawan Kumar Agarwal, Hsien-Chang Wang, Yu Feng Wang, Jean M. J. Frechet, Shah A. Haque
  • Publication number: 20030050433
    Abstract: Polyisobutylene (PIB) functionalized with terminal reactive unsaturation is disclosed. Carbocationically polymerized monohalogen-terminated PIB is dehydrohalogenated in a hydrocarbon solvent using an alkoxide of the formula RO-M wherein R is alkyl of at least 5 carbon atoms and M is alkali metal. The PIB obtained has terminal unsaturation which is 100% in the reactive ‘exo’ form which can be converted to succinic anhydride groups (PIB-SA) by the ene reaction with maleic anhydride. The PIB-SA is reactive with amine functional dendrimers to obtain a star-branched polymer having a dendrimer core and PIB branches joined by succinimide linkages. Blends of the star-branched polymer with polypropylene have improved energy absorption properties and controllable moisture/oxygen permeabilities useful in films.
    Type: Application
    Filed: October 23, 2002
    Publication date: March 13, 2003
    Inventors: Pawan Kumar Agarwal, Hsien-Chang Wang, Yu Feng Wang, Jean M. J. Frechet, Shah A. Haque
  • Publication number: 20010007897
    Abstract: Polyisobutylene (PIB) functionalized with terminal reactive unsaturation is disclosed. Carbocationically polymerized monohalogen-terminated PIB is dehydrohalogenated in a hydrocarbon solvent using an alkoxide of the formula RO-M wherein R is alkyl of at least 5 carbon atoms and M is alkali metal. The PIB obtained has terminal unsaturation which is 100% in the reactive ‘exo’ form which can be converted to succinic anhydride groups (PIB-SA) by the ene reaction with maleic anhydride. The PIB-SA is reactive with amine functional dendrimers to obtain a star-branched polymer having a dendrimer core and PIB branches joined by succinimide linkages. Blends of the star-branched polymer with polypropylene have improved energy absorption properties and controllable moisture/oxygen permeabilities useful in films.
    Type: Application
    Filed: February 6, 2001
    Publication date: July 12, 2001
    Inventors: Pawan Kumar Agarwal, Hsien-Chang Wang, Yu Feng Wang, Jean M.J. Frechet, Shah A. Haque
  • Patent number: 6228978
    Abstract: Polyisobutylene (PIB) functionalized with terminal reactive unsaturation is disclosed. Carbocationically polymerized monohalogen-terminated PIB is dehydrohalogenated in a hydrocarbon solvent using an alkoxide of the formula RO-M wherein R is alkyl of at least 5 carbon atoms and M is alkali metal. The PIB obtained has terminal unsaturation which is 100% in the reactive ‘exo’ form which can be converted to succinic anhydride groups (PIB-SA) by the ene reaction with maleic anhydride. The PIB-SA is reactive with amine functional dendrimers to obtain a star-branched polymer having a dendrimer core and PIB branches joined by succininide linkages. Blends of the star-branched polymer with polypropylene have improved energy absorption properties and controllable moisture/oxygen permeabilities useful in films.
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: May 8, 2001
    Assignee: Exxon Mobil Chemical Patents Inc
    Inventors: Pawan Kumar Agarwal, Hsien-Chang Wang, Yu Feng Wang, Jean M. J. Frechet, Shah A. Haque
  • Patent number: 6111019
    Abstract: This invention is for LLDPE blends with an ethylene-norbornene copolymer for resins and improved toughness and processibility for film production. This invention provides LLDPE based resins which are significantly improved with respect to their capability to be fabricated into a film layer, particularly by a blown bubble extrusion technique. Films prepared of the LLDPE/E-NB melt blended resins of this invention are significantly improved with respect to certain of their film properties, such as tear strength, without detracting from the beneficial properties that a LLDPE otherwise provides to a film.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: August 29, 2000
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Palanisamy Arjunan, Wai Yan Chow, Bruce Allan Harrington, Yu Feng Wang, Henry Yang