The invention relates to the field of
flame-retardant materials, in particular to high-
flame-retardance
epoxy resin and a preparation method thereof. The preparation raw materials of the high-
flame-retardancy
epoxy resin comprise a material A and a material B, the material A comprises the following raw materials in parts by
mass: 100 parts of flame-retardant
epoxy resin, 1-2 parts of a dispersing agent and 60-100 parts of an inorganic flame retardant; and the material B comprises the following raw materials in parts by
mass: 60-100 parts of a curing agent, 0.1-0.3 part of a catalyst and 60-100 parts of an inorganic flame retardant. Through the synergistic flame-retardant design of the flame retardant and the flame-retardant filler, the problem of poor flame-retardant durability caused by purely adding the flame retardant or using the common filler is effectively solved, the prepared epoxy resin shows excellent flame-retardant property in a UL94 vertical
combustion test, and meanwhile, the flame-retardant property of the epoxy resin is improved by reasonably adjusting the proportion of the flame retardant. On the premise of ensuring high flame retardance, the mechanical properties of
impact, stretching, bending, compression and the like of the material are considered, and various mechanical indexes are stable and meet the use requirements of the
ignition coil.