A kind of preparation method of unsaturated polyurethane coating
A polyurethane coating, unsaturated technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of long curing time, low product qualification rate, high curing temperature of plastic coatings, etc., and achieve high refractive index and good transparency , good firmness and aging resistance
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Embodiment 1
[0043] In a four-necked flask, add 1g 2-mercaptoethanol, 5g PCD1000, 1g PPG400, 2g BSA-F30 and stir evenly, vacuumize at 120℃ for 1h, cool to 50℃, add 0.02g dibutyltin dilaurate and 100g dibutyltin Toluene, then add 5.02g of XDI, keep at 70℃ until the NCO content is 0.2%, then add 0.002g of 4-methoxyphenol, stir evenly, add 0.69g of hydroxyethyl methacrylate, keep at 70℃ until NCO is 0 , To obtain the product, the measured molecular weight is about 12000, take 10g of the product, add 0.02gBHT, 0.01g UV531, 0.01g BYK-358N, 0.01g BYK-A550, 0.05g1173, and mix uniformly to obtain an unsaturated polyurethane coating composition .
Embodiment 2
[0045] In a four-necked flask, add 1g BEPD, 2g BSA F-30, 1g PPG400, 5g PCL1000 and stir evenly, vacuumize at 120℃ for 1h, cool to 50℃, add 0.02g dibutyltin dilaurate and 100g xylene, Then add 4.98g of IPDI, keep at 70℃ until the NCO content is 0.2%, then add 0.002g of 4-methoxyphenol, stir evenly, add 0.70g of hydroxypropyl methacrylate, keep at 70℃ until NCO is 0, The obtained product has a measured molecular weight of about 13000. Take 10 g of the product, add 0.02 g BHT, 0.01 g UV531, 0.01 g BYK-358N, 0.01 g BYK-A550, 0.05 g 1173, and mix uniformly to obtain an unsaturated polyurethane coating composition.
Embodiment 3
[0047] In a four-necked flask, add 1g CHDM, 2g BSA F-30, 1g PPG400, 5g PDA1000 and stir well, vacuumize at 120℃ for 1h, cool to 50℃, add 0.02g dibutyltin dilaurate and 100g xylene, Then add 3.26g of HDI, keep at 70℃ until NCO content is 0.2%, then add 0.002g of 4-methoxyphenol, stir well, add 0.70g of hydroxypropyl methacrylate, keep at 70℃ until NCO is 0, , The product is obtained, and the measured molecular weight is about 12000. Take 10 g of the product, add 0.02 g BHT, 0.01 g UV531, 0.01 g BYK-358N, 0.01 g BYK-A550, 0.05 g 1173, and mix uniformly to obtain an unsaturated polyurethane coating composition.
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