Preparation method of zinc-rich anticorrosive composite coating
A composite coating and zinc-rich technology, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of easy falling off of the coating film and low adhesion, and achieve improved water and oil repellency and electrical insulation High, low curing shrinkage effect
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Embodiment 1
[0032]In parts by weight, weigh 60 parts of glycerol, 0.3 parts of methyltriethoxysilane, and 10 parts of nano-zinc oxide with a particle diameter of 20nm, add methyltriethoxysilane to glycerol, and Stir at a speed of 200r / min for 10min to obtain a modified solution. Add nano-zinc oxide to the modified solution, place it in a magnetic stirrer at room temperature and stir at a speed of 300r / min for 1h, filter with suction to obtain a solid, and place the solid in In an oven, dry at 70°C for 1 hour, and then grind in a grinder for 10 minutes to obtain modified nano-zinc oxide powder;
[0033] Then weigh 20 parts of epoxy resin, 6 parts of dimethyl polysiloxane, 60 parts of cyclopentanone, 1 part of vinyltriethoxysilane, 0.3 part of dibutyl dilauric acid in parts by weight Tin, add dimethylpolysiloxane and vinyltriethoxysilane to cyclopentanone, stir at 200r / min for 20min at room temperature to obtain a silane cyclopentanone solution, mix epoxy resin, dibutyl di Add tin laurate ...
Embodiment 2
[0036] In parts by weight, weigh 65 parts of glycerol, 0.4 part of methyltriethoxysilane, and 15 parts of nano-zinc oxide with a particle diameter of 25nm, add methyltriethoxysilane to glycerol, and Stir at a speed of 220r / min for 15min to obtain a modified solution. Add nano-zinc oxide to the modified solution, place it in a magnetic stirrer at room temperature and stir at a speed of 350r / min for 2h, and filter with suction to obtain a solid. Dry in an oven at 75°C for 2 hours, and then grind in a grinder for 15 minutes to obtain modified nano-zinc oxide powder;
[0037] Then weigh 25 parts of epoxy resin, 7 parts of dimethyl polysiloxane, 70 parts of cyclopentanone, 2 parts of vinyltriethoxysilane, 0.4 part of dibutyl dilauric acid in parts by weight Tin, add dimethylpolysiloxane and vinyltriethoxysilane to cyclopentanone, stir at 250r / min for 25min at room temperature to obtain a silane cyclopentanone solution, mix epoxy resin, dibutyl di Tin laurate was added to the silan...
Embodiment 3
[0040] In parts by weight, weigh 70 parts of glycerol, 0.5 part of methyltriethoxysilane, and 20 parts of nano-zinc oxide with a particle size of 30nm, add methyltriethoxysilane to glycerol, and Stir at a speed of 240r / min for 20min to obtain a modified solution. Add nano-zinc oxide into the modified solution, place it in a magnetic stirrer at room temperature and stir at a speed of 400r / min for 3h, filter with suction to obtain a solid, and place the solid in In an oven, dry at 80°C for 3 hours, and then grind in a grinder for 20 minutes to obtain modified nano-zinc oxide powder;
[0041] Then weigh 30 parts of epoxy resin, 8 parts of dimethylpolysiloxane, 80 parts of cyclopentanone, 3 parts of vinyltriethoxysilane, 0.5 part of dibutyl dilauric acid in parts by weight Tin, add dimethylpolysiloxane and vinyltriethoxysilane to cyclopentanone, stir at 300r / min for 30min at room temperature to obtain a silane cyclopentanone solution, mix epoxy resin, dibutyl di Add tin laurate t...
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