A series of high performance, toughened epoxy resins has been developed as matrices for advanced composites. The resin systems possess excellent processability with a wide processing window. Preimpregnated fiber (prepreg) exhibits good tack and drape. Carbon fiber composite laminates possess an excellent balance of mechanical properties, particularly with intermediate modulus fibers. Toughness, as measured by post impact compression strength, is extremely high. With an impact energy of 1500 in. Ib/in. (6.7 J/mm) compression strength values of up to 48 ksi (328 MPa) have been achieved.
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