The present invention relates to a
flame retardant
epoxy prepreg
composite material and its preparation method and its use, the
composite material contains 20 to 70% of
epoxy resin matrix and 30-80% of
fiber reinforced materials; wherein the
epoxy resin matrix comprises the following components by
mass part: 100 parts of an F type epoxy resin, 10-50 parts of an E type epoxy resin, 5-40 parts of
tetrabromobisphenol A, 5-20 parts of a curing agent, 1-10 parts of a curing accelerator, 5-25 parts of a
toughening agent, 1-10 parts of antimonous
oxide and 20-80 parts of an
organic solvent. According to the invention, F46 type epoxy resin containing a
rigid frame structure is taken as a main component, the
flame retarding and
toughening modification are carried out on the
resin matrix by a combination technology, the epoxy
composite material with high
toughness, high
flame retardancy and good overlaying manufacturability can be realized, the
flue gas density is obviously decreased when the flame is carried out, and the epoxy prepreg composite material possesses important popularization and application prospects in the fields of large aircraft, ships, high-speed rails and the like.