A composite material layer, the composite material layer comprising a curable resin which is in the form of a solid layer at 20°C, wherein the composite material layer comprises a prepreg comprising at least one ply of fibrous reinforcement material which is at least partly impregnated by the curable resin or the composite material layer comprises a film of the curable resin which is optionally carried on a support layer, wherein at least 50 wt% of the curable resin comprises at least one polymerisable vinyl ester prepolymer having at least two carbon-carbon unsaturated functional groups, the prepolymer being polymerisable by reaction of the unsaturated functional groups to form a cured resin, wherein the curable resin further comprises a free-radical curing system for polymerizing the polymerisable vinyl ester prepolymer. In a preferred embodiment, the prepolymer is the reaction product of an epoxy resin and 2-hydroxyethyl methacrylate phthalate.


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    Title :

    Composite material layer and manufacture of sandwich panels


    Contributors:
    WILL TRAVIS (author) / BEN CREASER (author)

    Publication date :

    2023-02-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / F03D Windkraftmaschinen , WIND MOTORS / C08J Verarbeitung , WORKING-UP / C08F MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS , Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind



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