Patents Represented by Attorney George E. Kirvan

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  • Blends of perfluoroelastomers and fluoroplastics
    Patent number: 7476711
    Abstract: Cured articles are prepared from a composition that comprises a blend of a perfluoroelastomer and 51-300 phr of a semi-crystalline thermoplastic copolymer comprising copolymerized units of tetrafluoroethylene and 5-12 weight percent of a perfluoro(alkyl vinyl ether). The semi-crystalline copolymer is present as particles having an average particle size greater than 100 nm.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: January 13, 2009
    Assignee: Du Pont Performance Elastomers. L.L.C.
    Inventors: Kohtaro Takahashi, Yuji Onodera