Patents by Inventor Ming-Hong Hung
Ming-Hong Hung 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: 8394870Abstract: Disclosed herein is a crosslinked fluoropolymer network formed by the free radical initiated crosslinking of a diacrylate fluoropolymer The diacrylate copolymer is of formula CH2?CR?COO—(CH2)n—R—(CH2)n—OOCR??CH2, wherein R is selected from the group consisting of i) an oligomer comprising copolymerized units of vinylidene fluoride and perfluoro(methyl vinyl ether), ii) an oligomer comprising copolymerized units of vinylidene fluoride and hexafluoropropylene, iii) an oligomer comprising copolymerized units of tetrafluoroethylene and perfluoro(methyl vinyl ether), and iv) an oligomer comprising copolymerized units of tetrafluoroethylene and a hydrocarbon olefin, R? is H or —CH3, n is 1-4 and wherein said oligomer has a number average molecular weight of 1000 to 25,000 daltons. The source of the free radicals may be a photoinitiator or an organic peroxide.Type: GrantFiled: July 16, 2009Date of Patent: March 12, 2013Assignees: E.I. du Pont de Nemours and Company, Le Centre National de la Recherche ScienceInventors: Ming-Hong Hung, Bruno Ameduri, Georgi Kostov
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Publication number: 20130012673Abstract: This invention relates to curable fluoroelastomer compositions comprising a) fluoroelastomers having either nitrile, alkyne or azide cure sites and b) fluorinated curatives containing diazide, dinitrile or dialkyne groups for reacting with cure sites on the fluoroelastomer. Fluoroelastomers having azide cure sites form crosslinks with curatives having dinitrile or dialkyne groups. Fluoroelastomers having nitrile or alkyne cure sites form crosslinks with curatives having diazide groups.Type: ApplicationFiled: September 12, 2012Publication date: January 10, 2013Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: MING-HONG HUNG, BRUNO AMEDURI, GUILLAUME TILLET
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Publication number: 20130012674Abstract: Oligomers of perfluoro(methyl vinyl ether) with vinylidene fluoride or tetrafluoroethylene are disclosed that contain 40-90 mole percent copolymerized units of vinylidene fluoride or tetrafluoroethylene and 10-60 mole percent copolymerized units of perfluoro(methyl vinyl ether), said oligomers having two functional endgroups and having a number average molecular weight between 1000 and 25,000.Type: ApplicationFiled: September 13, 2012Publication date: January 10, 2013Applicant: E I DU PONT DE NEMOURS AND COMPANY LE CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Ming-Hong Hung, Bruno Ameduri, Cyrille Andre Jean-Marie Boyer
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Patent number: 8288482Abstract: This invention relates to curable fluoroelastomer compositions comprising a) fluoroelastomers having either nitrile, alkyne or azide cure sites and b) fluorinated curatives containing diazide, dinitrile or dialkyne groups for reacting with cure sites on the fluoroelastomer. Fluoroelastomers having azide cure sites form crosslinks with curatives having dinitrile or dialkyne groups. Fluoroelastomers having nitrile or alkyne cure sites form crosslinks with curatives having diazide groups.Type: GrantFiled: June 17, 2009Date of Patent: October 16, 2012Assignee: E I du Pont de Nemours and CompanyInventors: Ming-Hong Hung, Bruno Ameduri, Guillaume Tillet
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Patent number: 8288492Abstract: Oligomers of perfluoro(methyl vinyl ether) with vinylidene fluoride or tetrafluoroethylene are disclosed that contain 40-90 mole percent copolymerized units of vinylidene fluoride or tetrafluoroethylene and 10-60 mole percent copolymerized units of perfluoro(methyl vinyl ether), said oligomers having two functional endgroups and having a number average molecular weight between 1000 and 25,000.Type: GrantFiled: September 12, 2008Date of Patent: October 16, 2012Assignees: E I du Pont de Nemours and CompanyInventors: Ming-Hong Hung, Bruno Ameduri, Cyrille Andre Jean-Marie Boyer
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Publication number: 20120245383Abstract: Disclosed herein are novel fluoroolefins of formula Rf—O—(CF2CF2)n(CH2CF2)m—CH?CH2, wherein n is 1 or 2, m is 0 or 1 and Rf is a C1-C8 fluoroalkyl or fluoroalkoxy group. The fluoroolefins may be oxidized to manufacture fluorinated carboxylic acids. Also disclosed are fluoropolymers comprising copolymerized units of the fluoroolefins of the invention and at least one other fluoromonomer.Type: ApplicationFiled: June 11, 2012Publication date: September 27, 2012Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: MING-HONG HUNG, Sheng Peng
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Patent number: 8247614Abstract: Fluorinated copolymers are prepared via copolycondensation polymerization in a process comprising reacting A) a telechelic fluoroazido compound of formula N3(Y)p—(CH2)n—R—(CH2)m—(Y)pN3, wherein Y is SO, SO2, C6H4, or CO, p=0 or 1, n and m are independently 1 to 4, and R is selected from the group consisting of i) a C3-C10 fluoroalkylene group, ii) a C3-C10 fluoroalkoxylene group, iii) a substituted aryl group, iv) an oligomer comprising copolymerized units of vinylidene fluoride and perfluoro(methyl vinyl ether), v) an oligomer comprising copolymerized units of vinylidene fluoride and hexafluoropropylene, vi) an oligomer comprising copolymerized units of tetrafluoroethylene and perfluoro(methyl vinyl ether), and vii) an oligomer comprising copolymerized units of tetrafluoroethylene and a hydrocarbon olefin with B) a telechelic diyne or dinitrile compound in the presence of copper halide catalyst.Type: GrantFiled: June 17, 2009Date of Patent: August 21, 2012Assignees: E I du Pont de Nemours and CompanyInventors: Ming-Hong Hung, Bruno Ameduri, Bernard Boutevin, Aurelien Soules
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Patent number: 8217126Abstract: Disclosed herein are novel fluoroolefins of formula Rf—O—(CF2CF2)n(CH2CF2)m—CH?CH2, wherein n is 1 or 2, m is 0 or 1 and Rf is a C1-C8 fluoroalkyl or fluoroalkoxy group. The fluoroolefins may be oxidized to manufacture fluorinated carboxylic acids. Also disclosed are fluoropolymers comprising copolymerized units of the fluoroolefins of the invention and at least one other fluoromonomer.Type: GrantFiled: October 14, 2008Date of Patent: July 10, 2012Assignee: E I du Pont de Nemours and CompanyInventors: Ming-Hong Hung, Sheng Peng
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Patent number: 8138274Abstract: Fluorosilicon polymers are disclosed that are prepared by a process comprising reacting a) iodinated oligomers having copolymerized units of perfluoro(methyl vinyl ether) and vinylidene fluoride or tetrafluoroethylene that contain 40-90 mole percent copolymerized units of vinylidene fluoride or tetrafluoroethylene and 10-60 mole percent copolymerized units of perfluoro(methyl vinyl ether), said oligomers having two functional endgroups and having a number average molecular weight between 1000 and 25,000 with b) a methoxyvinyl silane or an ethoxyvinyl silane to form a silicon-containing polymeric adduct that is further reacted with an acid to form a crosslinked fluorinated polymer.Type: GrantFiled: December 8, 2009Date of Patent: March 20, 2012Assignees: Dupont Performance Elastomers LLCInventors: Ming-Hong Hung, Bruno Ameduri
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Publication number: 20110257423Abstract: An emulsion polymerization process for the production of fluoroelastomers is disclosed wherein at least one fluorosurfactant is employed as dispersant, said fluorosurfactant being a fluoroalkylphosphoric acid ester of the formula X—Rf—(CH2)n—O—P(O)(OM)2, wherein n=1 or 2, X=H or F, M=a univalent cation, and Rf is a C4-C6 fluoroalkyl or fluoroalkoxy group. Optionally, a second dispersing agent may be employed in the polymerization, said second agent being a perfluoropolyether having at least one endgroup selected from the group consisting of carboxylic acid, a salt thereof, sulfonic acid and a salt thereof, phosphoric acid and a salt thereof.Type: ApplicationFiled: June 27, 2011Publication date: October 20, 2011Applicant: DUPONT PERFORMANCE ELASTOMERS LLCInventors: Michael Cregg Coughlin, Ming-Hong Hung, Phan Linh Tang
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Patent number: 7999049Abstract: An emulsion polymerization process for the production of fluoroelastomers is disclosed wherein at least one fluorosurfactant is employed as dispersant, said fluorosurfactant being a fluoroalkylphosphoric acid ester of the formula X—Rf-(CH2)n—O—P(O)(OM)2, wherein n=1 or 2, X=H or F, M=a univalent cation, and Rf is a C4-C6 fluoroalkyl or fluoroalkoxy group. Optionally, a second dispersing agent may be employed in the polymerization, said second agent being a perfluoropolyether having at least one endgroup selected from the group consisting of carboxylic acid, a salt thereof, sulfonic acid and a salt thereof, phosphoric acid and a salt thereof.Type: GrantFiled: January 15, 2009Date of Patent: August 16, 2011Assignee: DuPont Performance Elastomers L.L.C.Inventors: Michael Cregg Coughlin, Ming-Hong Hung, Phan Linh Tang
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Patent number: 7989566Abstract: An emulsion polymerization process for the production of non-elastomeric fluoropolymers is disclosed wherein at least one fluorosurfactant is employed as dispersant, said fluorosurfactant being a fluoroalkylphosphoric acid ester of the formula X-Rf-(CH2)n—O—P(O)(OM)2, wherein n is 1 or 2, X?H or F, M=a univalent cation, and Rf is a C4-C6 fluoroalkyl or fluoroalkoxy group. Optionally, a second dispersing agent may be employed in the polymerization, said second agent being a perfluoropolyether having at least one endgroup selected from the group consisting of carboxylic acid, a salt thereof, sulfonic acid and a salt thereof, phosphoric acid and a salt thereof.Type: GrantFiled: January 15, 2009Date of Patent: August 2, 2011Assignee: DuPont Performance Elastomers LLCInventors: Michael Cregg Coughlin, Ming-Hong Hung
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Patent number: 7977426Abstract: A compound of Formula (1) Rf—O—(CXX?)m—(CY2)nSO3M??(1) wherein Rf is a C1 to C4 linear or branched perfluoroalkyl group, X and X? are each independently H or F, provided that at least one of X or X? is F, each Y is independently H or F, m is an integer from 1 to 4, n is an integer from 1 to 2, and M is H, NH4, Li, Na or K, provided that when CXX? is CHF or CFH, then n is 2.Type: GrantFiled: November 13, 2008Date of Patent: July 12, 2011Assignee: E. I. du Pont de Nemours and CompanyInventors: Sheng Peng, Ming-Hong Hung, Christopher P. Junk, Phan Linh Tang
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Publication number: 20110136999Abstract: Fluorosilicon polymers are disclosed that are prepared by a process comprising reacting a) iodinated oligomers having copolymerized units of perfluoro(methyl vinyl ether) and vinylidene fluoride or tetrafluoroethylene that contain 40-90 mole percent copolymerized units of vinylidene fluoride or tetrafluoroethylene and 10-60 mole percent copolymerized units of perfluoro(methyl vinyl ether), said oligomers having two functional endgroups and having a number average molecular weight between 1000 and 25,000 with b) a methoxyvinyl silane or an ethoxyvinyl silane to form a silicon-containing polymeric adduct that is further reacted with an acid to form a crosslinked fluorinated polymer.Type: ApplicationFiled: December 8, 2009Publication date: June 9, 2011Applicant: DUPONT PERFORMANCE ELASTOMERS L.L.C.Inventors: Ming-Hong Hung, Bruno Ameduri
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Publication number: 20110015359Abstract: Disclosed herein is a crosslinked fluoropolymer network formed by the free radical initiated crosslinking of a diacrylate fluoropolymer The diacrylate copolymer is of formula CH2?CR?COO—(CH2)n—R—(CH2)n—OOCR??CH2, wherein R is selected from the group consisting of i) an oligomer comprising copolymerized units of vinylidene fluoride and perfluoro(methyl vinyl ether), ii) an oligomer comprising copolymerized units of vinylidene fluoride and hexafluoropropylene, iii) an oligomer comprising copolymerized units of tetrafluoroethylene and perfluoro(methyl vinyl ether), and iv) an oligomer comprising copolymerized units of tetrafluoroethylene and a hydrocarbon olefin, R? is H or —CH3, n is 1-4 and wherein said oligomer has a number average molecular weight of 1000 to 25,000 daltons. The source of the free radicals may be a photoinitiator or an organic peroxide.Type: ApplicationFiled: July 16, 2009Publication date: January 20, 2011Applicant: DUPONT PERFORMANCE ELASTOMERS L.L.C.Inventors: Ming-Hong Hung, Bruno Ameduri, Georgi Kostov
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Publication number: 20110015358Abstract: Disclosed herein is a telechelic diacrylate fluoropolymer and a process for manufacture of the fluoropolymer. The diacrylate copolymer is of formula CH2?CR?COO—(CH2)n—R—(CH2)n—OOCCR??CH2, wherein R is selected from the group consisting of i) an oligomer comprising copolymerized units of vinylidene fluoride and perfluoro(methyl vinyl ether), ii) an oligomer comprising copolymerized units of vinylidene fluoride and hexafluoropropylene, iii) an oligomer comprising copolymerized units of tetrafluoroethylene and perfluoro(methyl vinyl ether), and iv) an oligomer comprising copolymerized units of tetrafluoroethylene and a hydrocarbon olefin, R? is H or —CH3, n is 1-4 and wherein said oligomer has a number average molecular weight of 1000 to 25,000 daltons.Type: ApplicationFiled: July 16, 2009Publication date: January 20, 2011Applicant: DUPONT PERFORMANCE ELASTOMERS L.L.C.Inventors: Ming-Hong Hung, Bruno Ameduri, Georgi Kostov
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Publication number: 20100324234Abstract: Fluorinated copolymers are prepared via copolycondensation polymerization in a process comprising reacting A) a telechelic fluoroazido compound of formula N3(Y)p—(CH2)n—R—(CH2)m—(Y)pN3, wherein Y is SO, SO2, C6H4, or CO, p=0 or 1, n and m are independently 1 to 4, and R is selected from the group consisting of i) a C3-C10 fluoroalkylene group, ii) a C3-C10 fluoroalkoxylene group, iii) a substituted aryl group, iv) an oligomer comprising copolymerized units of vinylidene fluoride and perfluoro(methyl vinyl ether), v) an oligomer comprising copolymerized units of vinylidene fluoride and hexafluoropropylene, vi) an oligomer comprising copolymerized units of tetrafluoroethylene and perfluoro(methyl vinyl ether), and vii) an oligomer comprising copolymerized units of tetrafluoroethylene and a hydrocarbon olefin with B) a telechelic diyne or dinitrile compound in the presence of copper halide catalyst.Type: ApplicationFiled: June 17, 2009Publication date: December 23, 2010Applicants: DUPONT PERFORMANCE ELASTOMERS L.L.C., LE CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: MING-HONG HUNG, Bruno Ameduri, Bernard Boutevin, Aurelien Soules
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Publication number: 20100324222Abstract: This invention relates to curable fluoroelastomer compositions comprising a) fluoroelastomers having either nitrile, alkyne or azide cure sites and b) fluorinated curatives containing diazide, dinitrile or dialkyne groups for reacting with cure sites on the fluoroelastomer. Fluoroelastomers having azide cure sites form crosslinks with curatives having dinitrile or dialkyne groups. Fluoroelastomers having nitrile or alkyne cure sites form crosslinks with curatives having diazide groups.Type: ApplicationFiled: June 17, 2009Publication date: December 23, 2010Applicants: DUPONT PERFORMANCE ELASTOMERS L.L.C., LE CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: MING-HONG HUNG, Bruno Ameduri, Guillaume Tillet
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Patent number: 7754810Abstract: An emulsion polymerization process for the production of fluoropolymers is disclosed wherein a combination of at least two fluorosurfactants is employed as dispersants. At least one fluorosurfactant is a perfluoroalkyl or perfluoroalkoxy sulfinate. At least one other fluorosurfactant is a perfluoropolyether having at least one endgroup selected from the group consisting of carboxylic acid, a slat thereof, sulfonic acid and a salt thereof.Type: GrantFiled: October 21, 2008Date of Patent: July 13, 2010Inventors: Michael Cregg Coughlin, Ming-Hong Hung, Phan Linh Tang
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Publication number: 20100120980Abstract: A compound of Formula (1) Rf—O—(CXX?)m—(CY2)nSO3M ??(1) wherein Rf is a C1 to C4 linear or branched perfluoroalkyl group, X and X? are each independently H or F, provided that at least one of X or X? is F, each Y is independently H or F, m is an integer from 1 to 4, n is an integer from 1 to 2, and M is H, NH4, Li, Na or K, provided that when CXX? is CHF or CFH, then n is 2.Type: ApplicationFiled: November 13, 2008Publication date: May 13, 2010Inventors: Sheng Peng, Ming-Hong Hung, Christopher P. Junk, Phan Linh Tang