Self-repairing anticorrosive polyurethane coating and preparation method thereof
An anti-corrosion coating and polyurethane technology, applied in the direction of polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve problems such as the combination of self-healing mechanisms, and achieve the effects of good anti-corrosion effect, excellent self-healing performance and simple preparation process.
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[0016] The specific technical solutions of the present invention are described in conjunction with the embodiments.
[0017] Polypropylene glycol (PPG), isophorone diisocyanate (IPDI), dimethylolpropionic acid (DMPA) were dried in vacuum at 110±2°C for 12h. Under the protection of dry nitrogen, use 100 parts of PPG, 0.5 parts of IPDI and 5 parts of DMPA in a three-necked flask under the action of a catalyst to prepare a prepolymer in an environment of 55°C; the first-level coating of water-based polyurethane is synthesized by chain extension and emulsification process. The tested emulsion is a milky white stable emulsion with excellent thermal performance parameters. Using 10 parts of tetraethoxy silicon orthosilicate (TEOS) as the wall material, 4 parts of linseed oil as the core material, and 18 parts of polydopamine as the nano valve, nano-silicon microspheres were synthesized.
[0018] Analyzed by scanning electron microscope, the surface of the microspheres is smooth and even...
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