Patents by Inventor David Yen-Lung Chung
David Yen-Lung Chung 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).
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Patent number: 8354473Abstract: The invention discloses improved processes to halogenate polymers. In particular, the invention discloses to improved processes to halogenate polymers made from C4-1012 isoolefins.Type: GrantFiled: February 11, 2011Date of Patent: January 15, 2013Assignee: ExxonMobil Chemical Patents Inc.Inventors: David Yen-Lung Chung, Michael Francis McDonald, Robert Norman Webb, Richard Dwight Hembree
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Patent number: 8283407Abstract: The invention provides for processes to produce elastomeric compositions, the processes including contacting at least one elastomer with a processing aid, wherein the processing aid includes the reaction product of at least one functionalized polymer having at least one anhydride group contacted with at least one polyamine, wherein the at least one polyamine includes at least one primary amine. The invention also provides for articles such as innerliners for tires produced from the aforementioned elastomeric compositions.Type: GrantFiled: December 16, 2005Date of Patent: October 9, 2012Assignee: ExxonMobil Chemical Patents Inc.Inventors: Walter Harvey Waddell, David Yen-Lung Chung, Robert Christopher Napier, Donald Sheley Tracey
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Patent number: 8247496Abstract: The invention provides for processes to produce elastomeric compositions, the processes including contacting at least one elastomer with a processing aid, wherein the processing aid comprises at least one functionalized polymer having at least one halogen group. The invention also provides for articles such as innerliners for tires produced from the aforementioned elastomeric compositions.Type: GrantFiled: December 5, 2005Date of Patent: August 21, 2012Assignee: ExxonMobil Chemical Patents Inc.Inventors: Walter Harvey Waddell, David Yen-Lung Chung, Robert Christopher Napier, Donald Sheley Tracey
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Patent number: 7960454Abstract: The invention provides for processes to produce elastomeric compositions, the processes including contacting at least one elastomer with a processing aid, wherein the processing aid comprises at least one functionalized polymer having at least one anhydride group. The invention also provides for articles such as innerliners for tires produced from the aforementioned elastomeric compositions.Type: GrantFiled: December 16, 2005Date of Patent: June 14, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Walter Harvey Waddell, David Yen-Lung Chung, Robert Christopher Napier, Donald Sheley Tracey, Dirk Frans Rouckhout
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Publication number: 20110136987Abstract: The invention discloses improved processes to halogenate polymers. In particular, the invention discloses to improved processes to halogenate polymers made from C4-1012 isoolefins.Type: ApplicationFiled: February 11, 2011Publication date: June 9, 2011Inventors: David Yen-Lung Chung, Michael Francis McDonald, Robert Norman Webb, Richard Dwight Hembree
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Patent number: 7910662Abstract: The invention discloses improved processes to halogenate polymers. In particular, the invention discloses to improved processes to halogenate polymers made from C4-1012 isoolefins.Type: GrantFiled: December 28, 2005Date of Patent: March 22, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: David Yen-Lung Chung, Michael Francis McDonald, Robert Norman Webb, Richard Dwight Hembree
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Patent number: 7781547Abstract: The invention relates to new polymerization processes using hydrofluorocarbons to produce polymers. In particular, the invention relates to new polymerization processes using turbulent flow reactor systems using diluents including one or more hydrofluorocarbon(s) to produce polymers.Type: GrantFiled: June 25, 2004Date of Patent: August 24, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Yuan-Ju (Ray) Chen, Michael Francis McDonald, Timothy Daniel Shaffer, David Yen-Lung Chung, Robert Norman Webb
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Patent number: 7723447Abstract: The invention provides for a process to produce polymers utilizing a hydrofluorocarbon diluent.Type: GrantFiled: December 19, 2003Date of Patent: May 25, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Scott Thomas Milner, Michael Gerard Matturro, Timothy Daniel Shaffer, Robert Norman Webb, David Yen-Lung Chung, Michael Francis McDonald
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Patent number: 7659355Abstract: The invention relates to novel air barriers made from elastomeric compositions. In particular, the invention relates to novel air barriers such as innerliners, air sleeves, and innertubes made from novel C4 to C7 isoolefin based polymers with new sequence distributions or that are substantially free of long chain branching.Type: GrantFiled: June 13, 2005Date of Patent: February 9, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Walter Harvey Waddell, David Yen-Lung Chung
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Patent number: 7585914Abstract: The present invention provides a thermoplastic composition which may be unvulcanized or vulcanized. The thermoplastic composition can be a blend of a thermoplastic engineering resin, a halogenated terpolymer of a C4 to C7 isomonoolefin, a para-alkylstyrene, and a multiolefin. The engineering resin can be a polyamide, such as nylon 6/66 copolymers for example. The isomonoolefin can be an isobutylene for example. The multiolefin can be a C4 to C14 diene, such as isoprene for example.Type: GrantFiled: November 9, 2005Date of Patent: September 8, 2009Assignee: ExxonMobil Chemical Patents Inc.Inventors: Andy Haishung Tsou, David Yen-Lung Chung
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Patent number: 7582715Abstract: The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers substantially free of long chain branching. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene, and a multiolefin, preferably a conjugated diene, more preferably isoprene, substantially free of long chain branching.Type: GrantFiled: December 19, 2003Date of Patent: September 1, 2009Assignee: Exxonmobil Chemical Patents Inc.Inventors: Scott Thomas Milner, Timothy Daniel Shaffer, David Yen-Lung Chung
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Patent number: 7491773Abstract: The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel halogenated polymers with new sequence distributions. In particular, the invention relates to halogenated copolymers of an isoolefin, preferably isobutylene, and a multiolefin, preferably a conjugated diene, more preferably isoprene, with new sequence distributions.Type: GrantFiled: December 10, 2004Date of Patent: February 17, 2009Assignee: ExxonMobil Chemical Patents Inc.Inventors: Timothy Daniel Shaffer, David Yen-Lung Chung
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Patent number: 7491764Abstract: The present invention includes blends of a halogenated elastomer such as a butyl rubber or an interpolymer of, on one embodiment, a C4 to C7 isomonoolefin, a para-methylstyrene and a para-(halomethylstyrene), the interpolymer having been pre-mixed with an exfoliating compound and clay, the entire blend forming a nanocomposite in one embodiment. The clay may or may not have undergone an additional exfoliating treatment prior to blending with the halogenated elastomer. The interpolymer/clay mixture forms a distinct phase in the nanocomposite blend of the invention. The blend of the invention has improved air barrier properties and is suitable as an air barrier.Type: GrantFiled: May 29, 2002Date of Patent: February 17, 2009Assignee: ExxonMobil Chemical Patents Inc.Inventors: Anthony Jay Dias, Andy Haishung Tsou, David Yen-Lung Chung, Weiqing Weng
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Patent number: 7485677Abstract: The present invention is a blend of an halogenated elastomer and a clay, desirably an exfoliated clay, to form a nanocomposite suitable for an air barrier. In one embodiment, the halogenated elastomer is a polymer comprising C4 to C7 isoolefin derived units, a para-methylstyrene derived units, and para-(halomethylstyrene) derived units. In another embodiment, the halogenated elastomer is a butyl-type rubber. The clay may or may not have an additional exfoliating treatment present prior to blending with the interpolymer. The interpolymer/clay mixture forms a distinct phase in the nanocomposite blend of the invention. The blend of the invention has improved air barrier properties and is suitable as an innerliner or innertube.Type: GrantFiled: May 29, 2002Date of Patent: February 3, 2009Assignee: ExxonMobil Chemical Patents Inc.Inventors: Anthony Jay Dias, Andy Haishung Tsou, David Yen-Lung Chung, Weiqing Weng, Caiguo Gong
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Publication number: 20080319119Abstract: The invention provides for processes to produce elastomeric compositions, the processes including contacting at least one elastomer with a processing aid, wherein the processing aid includes the reaction product of at least one functionalized polymer having at least one anhydride group contacted with at least one polyamine, wherein the at least one polyamine includes at least one primary amine. The invention also provides for articles such as innerliners for tires produced from the aforementioned elastomeric compositions.Type: ApplicationFiled: December 16, 2005Publication date: December 25, 2008Applicant: EXXONMOBIL CHEMICAL PATENTS INC.Inventors: Walter Harvey Waddell, David Yen-Lung Chung, Robert Christopher Napier, Donald Sheley Tracey
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Publication number: 20080290049Abstract: The invention relates to methods for separating slurry components. In particular, the invention relates to the concentration of polymer particles in a slurry from the polymerization of C4-C7 isoolefins.Type: ApplicationFiled: June 23, 2004Publication date: November 27, 2008Inventors: Timothy Daniel Shaffer, Scott Thomas Milner, David Yen-Lung Chung, Michael Francis McDonald, Robert Norman Webb, Pamela Jean Wright
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Publication number: 20080293892Abstract: The invention discloses improved processes to halogenate polymers. In particular, the invention discloses to improved processes to halogenate polymers made from C4-1012 isoolefins.Type: ApplicationFiled: December 28, 2005Publication date: November 27, 2008Inventors: David Yen-Lung Chung, Michael Francis McDonald, Robert Norman Webb, Richard Dwight Hembree
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Publication number: 20080281021Abstract: The invention provides for processes to produce elastomeric compositions, the processes including contacting at least one elastomer with a processing aid, wherein the processing aid comprises at least one functionalized polymer having at least one anhydride group. The invention also provides for articles such as innerliners for tires produced from the aforementioned elastomeric compositions.Type: ApplicationFiled: December 16, 2005Publication date: November 13, 2008Applicant: EXXONMOBIL CHEMICAL PATNES INC.Inventors: Walter Harvey Waddell, David Yen-Lung Chung, Robert Christopher Napier, Donald Sheley Tracey, Dirk Frans Rouckhout
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Publication number: 20080262130Abstract: The invention provides for processes to produce elastomeric compositions, the processes including contacting at least one elastomer with a processing aid, wherein the processing aid comprises at least one functionalized polymer having at least one halogen group. The invention also provides for articles such as innerliners for tires produced from the aforementioned elastomeric compositions.Type: ApplicationFiled: December 5, 2005Publication date: October 23, 2008Inventors: Walter Harvey Waddell, David Yen-Lung Chung, Robert Christopher Napier, Donald Sheley Tracey
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Patent number: 7425601Abstract: The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene, and an alkylstyrene, preferably methylstyrene, even more preferably para-methylstyrene, with new sequence distributions. The copolymer may optionally be halogenated.Type: GrantFiled: December 19, 2003Date of Patent: September 16, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: David Yen-Lung Chung, Timothy Daniel Shaffer