Patents Assigned to DuPont Performance Elastomers L.L.C.
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Publication number: 20110224358Abstract: Peroxide curable fluoroelastomer compositions and articles made therefrom are disclosed. The compositions contain 5 to 45 weight percent, based on total weight of all fluoroelastomers present in the composition, of a blend of dynamically cured fluoroelastomer particles in an uncured fluoroelastomer. The compositions are unfilled, but have tensile properties adequate for many end use applications and are particularly useful as seals in semiconductor manufacturing equipment.Type: ApplicationFiled: May 26, 2011Publication date: September 15, 2011Applicant: DUPONT PERFORMANCE ELASTOMERS L.L.C.Inventors: RONALD D. STEVENS, Shuhong Wang
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Patent number: 8013072Abstract: At least partially hydrolyzed chlorosulfonated polyolefin elastomers containing 0.5-10 weight percent chlorine and 0.25 to 5 weight percent sulfur are prepared from low density polyethylene or from linear ethylene/alpha-olefin copolymer base resins having a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) less than 3.5.Type: GrantFiled: May 13, 2009Date of Patent: September 6, 2011Assignee: DuPont Performance Elastomers L.L.C.Inventor: Royce E. Ennis
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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: 7964001Abstract: Disclosed herein is a fuel management system having at least one fluororubber article in contact with biodiesel fuel wherein said fluororubber article comprises i) a polyhydroxy cured fluoroelastomer comprising copolymerized units of vinylidene fluoride and at least one other fluoromonomer, and ii) 1 to 10 parts by weight of a diester of a dicarboxylic acid per hundred parts fluoroelastomer. Also disclosed is a method for reducing volume swell of a polyhydroxy cured fluororubber article in contact with biodiesel fuel wherein 1 to 10 parts by weight of a diester of a dicarboxylic acid is incorporated into said article.Type: GrantFiled: April 14, 2009Date of Patent: June 21, 2011Assignee: DuPont Performance Elastomers L.L.C.Inventors: Shuichi Okutsu, Bunichi Rai
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Patent number: 7960480Abstract: In a process for the manufacture of fluoroelastomers, a water-soluble polymeric coagulant is employed that is an aqueous solution of polyethyleneimine or its copolymers.Type: GrantFiled: March 25, 2008Date of Patent: June 14, 2011Assignee: DuPont Performance Elastomers L.L.C.Inventors: Donald F. Lyons, Steven R. Oriani
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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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Patent number: 7915331Abstract: A fluoroelastomer masterbatch comprising a particulate matrix material wherein the particles of the matrix material have an average size selected from the range of from 1 ?m to 1000 ?m in diameter, the concentration of fluoroelastomer is from about 0.2% to 40% by weight, and the fluoroelastomer is dispersed within the interstitial spaces of the particulate matrix material.Type: GrantFiled: January 6, 2009Date of Patent: March 29, 2011Assignee: DuPont Performance Elastomers L.L.C.Inventors: Peter Anthony Fox, Steven Richard Oriani
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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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Patent number: 7872163Abstract: 3,4-Dichlorobutene-1 is produced by a process comprising the step of contacting 1,4-dichlorobutene-2 with either 1) a ferric carboxylate catalyst of the formula where R is an alkyl or alkenyl group of 4-18 carbon atoms, a cycloalkyl or cycloalkenyl group of 6-18 carbon atoms or an aryl group selected from phenyl, benzyl, xylyl, tolyl, and naphthyl groups, whereby a portion of the 1,4-dichlorobutene-2 is isomerized to form 3,4-dichlorobutene-1, or 2) a ferric carboxylate catalyst of the formula where R, R? and R? are independently alkyl or alkenyl groups of 4-18 carbon atoms, cycloalkyl or cycloalkenyl groups of 6-18 carbon atoms or aryl groups selected from phenyl, benzyl, xylyl, tolyl, and naphthyl groups, the sum of m, n and o is 3 and m, n and o are independently 0, 1 or 2, whereby a portion of the 1,4-dichlorobutene-2 is isomerized to form 3,4-dichlorobutene-1.Type: GrantFiled: December 16, 2009Date of Patent: January 18, 2011Assignee: DuPont Performance Elastomers L.L.C.Inventor: Jay Reimers
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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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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: 20100298503Abstract: A process aid for improving the processability of non-fluorinated melt processible polymers contains a fluoroelastomer having a Mooney viscosity (ML (1+10) at 121° C.) between 30 and 100 and at least two interfacial agents, one a polycaprolactone having a Mn between 2000 and 8000 and the other a polyalkylene oxide having a Mn between 3000 and 5000.Type: ApplicationFiled: May 20, 2009Publication date: November 25, 2010Applicant: DuPont Performance Elastomers L.L.C.Inventor: Steven R. Oriani
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Patent number: 7838601Abstract: Partially neutralized chlorosulfonated polyolefin elastomers containing 0.5-10 weight percent chlorine and 0.25 to 5 weight percent sulfur are prepared from polyolefin elastomer base resins selected from the group consisting of propylene/ethylene copolymers, ethylene/propylene/diene copolymers, isobutylene/diene copolymers, isobutylene homopolymers, hydrogenated styrene/butadiene block copolymers and hydrogenated styrene/isoprene block copolymers.Type: GrantFiled: March 13, 2008Date of Patent: November 23, 2010Assignee: DuPont Performance Elastomers L.L.C.Inventors: Royce Elton Ennis, Avinash C. Gadkari, Furman Eugene Glenn
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Publication number: 20100292395Abstract: A process for the manufacture of an oil concentrate comprising oil and one or more at least partially hydrolyzed chlorosulfonated polyolefin elastomers containing 0.5-50 weight percent chlorine and 0.25 to 5 weight percent sulfur is disclosed.Type: ApplicationFiled: May 13, 2009Publication date: November 18, 2010Applicant: DuPont Performance Elastomers L.L.C.Inventor: Royce E. Ennis
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Publication number: 20100292405Abstract: At least partially hydrolyzed chlorosulfonated polyolefin elastomers containing 0.5-10 weight percent chlorine and 0.25 to 5 weight percent sulfur are prepared from low density polyethylene or from linear ethylene/alpha-olefin copolymer base resins having a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) less than 3.5.Type: ApplicationFiled: May 13, 2009Publication date: November 18, 2010Applicant: DuPont Performance Elastomers L.L.C.Inventor: Royce E. Ennis
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Publication number: 20100216933Abstract: Cured perfluoroelastomers that contain high levels (i.e. at least 65 phr carbon black) and 1 to 15 phr of a perfluoropolyether exhibit good resistance to explosive decompression while maintaining good sealing properties.Type: ApplicationFiled: February 1, 2010Publication date: August 26, 2010Applicant: DUPONT PERFORMANCE ELASTOMERS L.L.C.Inventor: Shuhong Wang
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Publication number: 20100069554Abstract: Polyhydroxy curable fluoropolymer compositions comprise polyhydroxy curable fluoropolymer, a ?-fluoroalcohol having the formula R—(CF2)n-CH2—OH, wherein R is H, F or CH3O and n is an integer from 2 to 7, a polyhydroxy curative, acid acceptor and accelerator.Type: ApplicationFiled: September 9, 2009Publication date: March 18, 2010Applicant: DuPont Performance Elastomers L.L.C.Inventor: Steven R. Oriani
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Publication number: 20100016511Abstract: Polyhydroxy curable fluoroelastomer compositions contain at least one process aid that is an aminosilicone having only a single primary amine group per polysiloxane molecule.Type: ApplicationFiled: May 28, 2009Publication date: January 21, 2010Applicant: DuPont Performance Elastomers L.L.C.Inventor: STEVEN R. ORIANI
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Patent number: RE41896Abstract: Ethylene copolymer elastomer compositions, acrylate rubber compositions, nitrile rubber compositions, fluoroelastomer compositions, and chlorinated olefin elastomer compositions are provided which are curable by exposure to UV radiation. The compositions are particularly suited for production of elastomeric seals using hot melt equipment and a gasketing in place technique.Type: GrantFiled: February 12, 2009Date of Patent: October 26, 2010Assignee: DuPont Performance Elastomers L.L.C.Inventors: Patrick Luigi Paglia, Christian Ruepping