Elastic coating and preparation method thereof
A technology of elastic coatings and prepolymers, applied in the field of coatings, can solve the problems of poor mechanical strength of coatings, not resistant to wind and sand erosion, not suitable for outdoor use, etc., and achieve high transparency
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Embodiment 1
[0021] Prepare solvent: mix 20kg of diacetone alcohol, 55kg of propylene glycol methyl ether acetate, and 25kg of butyl acetate to obtain a mixed solution as a solvent for future use.
[0022] Preparation of polyether polyol prepolymer: mix 10kg polytetrahydrofuran diol and 5kg polyoxypropylene triol with 15kg 4,4'-dicyclohexylmethane diisocyanate, add 30kg solvent, and add 0.2kg drier, stir After uniformity, react at 70° C. for 7 hours to obtain a polyether polyol prepolymer with a solid mass fraction of 50% and an average molecular weight of 20,000.
[0023] Preparation of hydroxyacrylate: mix 15kg of hydroxypropyl methacrylate with 5kg of methyl methacrylate, 5kg of butyl methacrylate and 5kg of butyl acrylate, add 30kg of solvent, and add 0.2kg of dibenzoyl peroxide, Stir evenly and react at 70° C. for 6 hours to obtain a hydroxy acrylic resin with a solid mass fraction of 55%, an average molecular weight of 20,000, and a hydroxyl mass percentage of 5.86%.
[0024] Get pr...
Embodiment 2
[0033] Preparation of solvent: mix 10kg of diacetone alcohol, 60kg of propylene glycol methyl ether acetate, and 30kg of butyl acetate as a solvent for future use.
[0034] Preparation of polyether polyol prepolymer: mix 5kg polytetrahydrofuran diol, 10kg polyoxypropylene triol, 10kg isophorone diisocyanate, 5kg hexamethylene diisocyanate, add 30kg solvent, and add 0.3kg to dry agent, stirred evenly and reacted at 70°C for 6 hours to obtain a polyether polyol prepolymer with a solid mass fraction of 50% and a molecular weight of 5000.
[0035] Preparation of hydroxyacrylic resin: mix 20kg of hydroxypropyl methacrylate with 10kg of methyl methacrylate, 10kg of butyl methacrylate and 10kg of butyl acrylate, add 50kg of solvent, and add 0.1kg of diperoxide Benzoyl was stirred evenly and reacted at 70°C for 6 hours to obtain a hydroxy acrylic resin with a solid mass fraction of 50%, a molecular weight of 30,000, and a hydroxyl mass percentage of 4.7%.
[0036] Get prepared solven...
Embodiment 3
[0039] Preparation of solvent: mix 20kg of diacetone alcohol, 50kg of propylene glycol methyl ether acetate, and 30kg of butyl acetate to obtain a mixed solution as a solvent for future use.
[0040]Preparation of polyether polyol prepolymer: mix 15kg polytetrahydrofuran diol, 20kg polyoxypropylene triol with 15kg4,4'-dicyclohexylmethane diisocyanate, 10kg isophorone diisocyanate, 10kg hexamethylene diisocyanate Mix, add 70kg of solvent, and add 0.2kg of drier, stir evenly and react at 75°C for 8 hours to obtain a polyether polyol prepolymer with a solid mass fraction of 60%, and its average mass fraction is 10,000.
[0041] Preparation of hydroxyacrylic resin: mix 10kg hydroxypropyl methacrylate, 10kg hydroxyethyl methacrylate, 5kg hydroxypropyl acrylate with 10kg methyl methacrylate, 10kg butyl methacrylate and 5kg butyl acrylate, add and Solvent with the same total mass of the above monomers, and add an appropriate amount of dibenzoyl peroxide, stir evenly and react at 70°C...
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