This invention relates to a salt spray resistant and anti-aging curing
coating and its preparation method, belonging to the field of
coating technology. The
coating includes modified
epoxy resin, ternary
nanocomposite filler, composite light stabilizer, hydrophobic eutectic
solvent, polysiloxane-modified
aromatic amine curing agent, and bio-based
polyurethane curing agent. The modified
epoxy resin is prepared by reacting
bisphenol F
epoxy resin, KH-560
silane coupling agent, and
tetrabutylammonium bromide, followed by the addition of bi-terminated epoxy
silicone oil, 3,3'-dithiodipropionic acid, and p-toluenesulfonic acid, and then by adding
pentaerythritol phosphate and
antioxidant 1010. The polysiloxane-modified
aromatic amine curing agent is prepared by reacting m-phenylenediamine as a matrix, KH-560
silane coupling agent,
diphenylsilanediol, and
dibutyltin dilaurate. The bio-based
polyurethane curing agent is prepared by reacting
castor oil-modified
polyol,
isophorone diisocyanate,
dibutyltin dilaurate,
dimethylolpropionic acid, and
trimethylolpropane.