The invention discloses a preparation method of a waterborne
epoxy resin-based
asphalt heat-reflection heat-insulation weather-proof
coating. The preparation method comprises the following steps: adding water, a substrate
wetting agent, a defoaming agent, an anti-flash-
rust agent and a coalescing agent into a paint
mixing tank and carrying out dispersing; adding waterborne
bisphenol A
epoxy resinand performing dispersing; adding a pH
regulator to regulate a pH value and carrying out dispersing; adding anionic emulsified
asphalt and carrying out dispersing; adding an inorganic
bentonite thickener to regulate
viscosity; and carrying out dispersing to obtain a component A of the
coating; adding water, a defoaming agent, a dispersing agent and an anti-
settling agent into another paint mixingtank and carrying out dispersing; adding dry-process modified
sericite powder and
zinc phosphate, and carrying out sanding and dispersing; adding a waterborne modified amine curing agent and carryingout dispersing to obtain a component B; and mixing inorganically coated
rutile titanium dioxide, precipitated phase
silicon dioxide, hollow microspheres, a dispersing agent, a waterborne
epoxy curingagent and a waterborne epoxy
emulsion, carrying out
grinding and dispersing, and mixing the formed mixture with the component A of the
coating, the component B and chemically surface-modified shell
powder to obtain the waterborne coating.