UV-curing side-chain fluorine-containing water-based polyurethane paint and preparation method thereof
A water-based polyurethane and coating technology, applied in the field of coatings, can solve the problems of limiting the research of UV-cured water-based fluorine-containing polyurethane, cumbersome purification process, and high production cost, and achieve excellent surface hydrophobic and antifouling properties, high gloss, and good stability Effect
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Embodiment 1
[0042] The preparation method of UV curable side chain fluorine-containing waterborne polyurethane resin is as follows:
[0043] S1. In parts by weight, 10 parts of dodecafluoroheptyl acrylate, 20 parts of methyl methacrylate, 2.5 parts of 1-thioglycerol, 0.2 parts of azobisisobutyronitrile, and 67.3 parts of tetrahydrofuran were heated at 60°C under nitrogen Under the atmosphere, react for 24 hours by semi-titration solution polymerization method, and obtain fluorine-containing alkyl glycol by precipitation and purification with n-hexane or petroleum ether;
[0044] S2. In parts by weight, react 32 parts of isophorone diisocyanate, 36 parts of polypropylene glycol 1000, and 0.05 parts of dibutyltin laurate at 80-90°C for 2.5h, cool down to below 70°C, add 1.8 parts of 1 , 4-butanediol, 13.6 parts of fluorine-containing alkyl glycol described in S1, keep the temperature at 60-70°C, react for 2.5 hours, add 5.0 parts of 2,2-bis(hydroxymethyl)propionic acid to continue the react...
Embodiment 2
[0047] The preparation method of UV curable side chain fluorine-containing waterborne polyurethane resin is as follows:
[0048] S1. In parts by weight, put 15 parts of decafluoroheptyl acrylate, 15 parts of methyl methacrylate, 2.5 parts of 1-thioglycerol, 0.2 parts of azobisisobutyronitrile, and 67.3 parts of tetrahydrofuran in a nitrogen atmosphere at 60 ° C. Under the condition of semi-titration solution polymerization reaction for 24h, the fluorine-containing alkyl glycol was prepared by precipitation and purification of n-hexane or petroleum ether;
[0049] S2. In parts by weight, react 25 parts of isophorone diisocyanate, 25 parts of polytetrahydrofuran ether glycol 1000, and 0.05 part of dibutyltin laurate at 80-90°C for 2.5h, cool down to below 70°C, and add 1.4 parts of 1,4-butanediol, 34 parts of fluorine-containing alkyl glycol described in S1, keep the temperature at 60-70°C, react for 2.5 hours, add 4.8 parts of 2,2-bis(hydroxymethyl) propane The acid continue...
Embodiment 3
[0052] The preparation method of UV curable side chain fluorine-containing waterborne polyurethane resin is as follows:
[0053] S1. In parts by weight, 25 parts of trifluorooctyl acrylate, 1.0 part of 1-thiodiol, 0.1 part of azobisisobutyronitrile, and 73.9 parts of tetrahydrofuran were half-titrated at 60°C under a nitrogen atmosphere. Polymerization reaction for 24 hours, and precipitation and purification of n-hexane or petroleum ether to obtain fluorine-containing alkyl glycol;
[0054] S2. In parts by weight, react 29.8 parts of isophorone diisocyanate, 26.8 parts of polypropylene glycol 1000, and 0.1 part of dibutyltin laurate at 80-90°C for 2.5 hours, cool down to below 70°C, and add 1.8 parts of 1 , 4-butanediol, 16.8 parts of fluorine-containing alkyl glycol described in S1, keep the temperature at 60-70°C, react for 2.5 hours, add 4.9 parts of 2,2-bis(hydroxymethyl)propionic acid to continue the reaction After 2.5 hours, add 16 parts of pentaerythritol triacrylate...
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