The invention provides a
hydrocarbon fire resistant ultrathin expanded fireproof
coating and a preparation method thereof. The
coating comprises the following components in part by weight: 10 to 30 parts of
epoxy resin, 1 to 4 parts of modified curing agent, 5 to 20 parts of modified resin, 2 to 8 parts of rheological agent, 10 to 35 parts of catalyst, 10 to 25 parts of carbon forming agent, 0 to 11 parts of
foaming agent, 5 to 10 parts of fluxing agent, 3 to 10 parts of
pigment and filler, and 2 to 5 parts of antibacterial bactericide. The method comprises the following steps of: mixing the crushed resin and other components uniformly, extruding the mixture at the temperature of 95 DEG C at the rotational speed of 300
revolutions per minute, crushing the extruded product, and sieving the
powder with a
sieve of 40 meshes to obtain the
coating. The coating has low curing temperature, high
hydrocarbon fire resistant limit, good bonding force and high strength, can tolerate high and low-temperature circulating influence, has
air purification and sterilization functions, and is convenient for construction; and the preparation method is simple, and has low
energy consumption. The coating is particularly suitable for
fire protection of steel, aluminum and other materials of the indoor and outdoor
petrochemical industry with
hydrocarbon fire risks.