Patents Represented by Attorney Janice Dowdall

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  • Prepregs of curable epoxy resin compositions with 9,9-Bis (4-aminophenyl) fluorenes as curatives
    Patent number: 6007917
    Abstract: Curable epoxy resin compositions, preferably solvent-free, wherein a fluorene amine curative is partially melt dissolved and partially dispersed as a solid in at least one aromatic polyepoxide. The compositions provide prepregs which exhibit tack with surprisingly good shelf life properties. Cured composites comprising the prepregs are also provided. The cured composites exhibit little resin migration and glass transition temperatures that are comparable to those of cured neat resins.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: December 28, 1999
    Assignee: 3M Innovative Properties Company
    Inventors: Mark D. Weigel, Steven C. Hackett, Timothy J. Clemens