The invention relates to the technical field of preparation of demolding agent compositions, in particular to a preparation method of an oily antirust demolding agent. The preparation method comprisesthe following steps of using
ginkgo kernels as the
raw material, and pulping, so as to obtain a kernel pulp; adding a
sodium chloride solution,
cellulase and water into the kernel pulp, so as to obtain a kernel extracting solution; treating by ultrasonic
waves, centrifuging and separating, so as to obtain
ginkgo oil; adding a
mixed solution of
formaldehyde and
acetophenone into a
reflux solution,so as to obtain a
corrosion inhibitor of a main body; mixing the
corrosion inhibitor of the main body with
benzyl chloride, so as to obtain a film forming antirust agent; mixing the film forming antirust agent,
methenamine, gingko oil, and the like, and dispersing and emulsifying at high speed, so as to obtain the oily antirust demolding agent. The oily antirust demolding agent has the advantagesthat after the oily antirust demolding agent is covered on the surface of
metal, the ability of blocking and absorbing
oxygen in air is high; the gingko
oil can be chelated with one part of oxidizedmetal, so that the
adhesion force of the oily antirust demolding agent to the
metal is increased; after
mannich base is quaternized, and is in contact with the surface of the
metal, the active energyin
corrosion and rusting reaction is increased, and the application prospect is broad.