Epoxy resins containing thiadiazole and/or oxadiazole moieties

U.S. Patent Number: 5387657

Abstract: Epoxy resins containing more than one vicinal epoxide group per molecule and at least one thiadiazole, oxadiazole or both thiadiazole and oxadiazole moiety per molecule are disclosed, as well as curable and cured compositions thereof. Certain of these epoxy resins possess enantiotropic liquid crystallinity. These enantiotropic epoxy resins are useful in preparing copolymers with high glass transition temperatures and liquid crystalline morphology, which can result in enhanced unidirectional mechanical properties. These epoxy resins are useful in coating, casting, encapsulation, electronic or structural laminate or composite, filament winding or molding applications.

Inventors: Hefner, Jr.; Robert E. (Lake Jackson, TX), Schomaker; Joseph A. (Midland, MI), Earls; Jimmy D. (Lake Jackson, TX)

Assignee: The Dow Chemical Company (Midland, MI)

Application Number: 08/236,592

Issued: 1995-02-07

Expired: 2007-02-07

Classes: 525/523 ; 525/533; 528/103; 528/104; 528/206; 528/208; 528/210; 528/220; 528/229; 528/321; 528/327; 528/361; 528/365; 528/367; 528/369; 528/377; 528/391; 528/403; 528/407; 528/96; 549/551; 549/553

Field of search: 525/523,533 528/96,104,103,206,208,210,220,229,321,327,361,365,367,369,377,391,403,407 549/551,553

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