Water-based photo-cured unsaturated polyester and preparation method thereof
An unsaturated, light-curing technology, applied in the field of water-based unsaturated polyester and its synthesis, can solve the problems of affecting the long-term stability of the coating, affecting the hardness, gloss and scratch resistance of the paint film, and achieving easy recycling and reuse. Fast processing and curing speed and good stability
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Embodiment 1
[0029] The preparation method (one of bulk polymerization method) of aqueous photocurable unsaturated polyester, it comprises the following steps:
[0030]① Under the protection of nitrogen, 33.00g trimethylolpropane monoallyl ether, 9.23g neopentyl glycol (polyol), 17.53g dimethylol propionic acid, 14.77g phthalic anhydride ( saturated (including benzene ring) anhydride), 10.15g maleic anhydride [unsaturated anhydride containing carbon-carbon double bond (excluding benzene ring)], 15.84g adipic acid (saturated dibasic acid), and 0.26g of antioxidant (triphenyl phosphite) was added to a four-port reactor equipped with a stirrer, condenser, thermometer and dripping device, and the bulk polymerization method was adopted.
[0031] ②Raise the temperature to 140°C, keep it warm for 1h, then raise the temperature to 150°C, and keep it warm for 1h (keep reflux in this state, without draining). Then it takes 1 hour to raise the temperature to 180°C, keep it warm for 2 hours, and keep...
Embodiment 2
[0044] Embodiment 2 (the method two that adopts bulk polymerization method):
[0045] A preparation method for water-based photocurable unsaturated polyester (method two using bulk polymerization), which comprises the following steps:
[0046] ①Under the protection of nitrogen, 20.00g trimethylolpropane monoallyl ether, 16.50g neopentyl glycol, 12.00g dimethylolpropionic acid, 11.00g phthalic anhydride, 9.00g maleic anhydride , 10.00g of adipic acid, and 0.21g of antioxidant were added to a four-port reactor with a stirrer, condenser, thermometer and dripping device, and the bulk polymerization method was adopted.
[0047] ②Raise the temperature to 140°C, keep it warm for 1h, then raise the temperature to 150°C, and keep it warm for 1h (keep reflux in this state, without draining). Then it takes 1 hour to raise the temperature to 180°C, then add 9.00g of maleic anhydride, keep it warm for 2 hours, and keep the reaction at this temperature, and then keep 0.5 dehydration under ...
Embodiment 3
[0060] Embodiment 3 (one of the method that adopts bulk polymerization method):
[0061] A preparation method for water-based photocurable unsaturated polyester (one of the methods using bulk polymerization), which comprises the following steps:
[0062] ①Under the protection of nitrogen, 15.00g trimethylolpropane monoallyl ether, 18.75g neopentyl glycol, 10.00g dimethylol propionic acid, 25.00g phthalic anhydride, 11.88g maleic anhydride , 18.75g of adipic acid, and 0.26g of antioxidants were added to a four-port reactor with a stirrer, condenser, thermometer and dripping device, and the bulk polymerization method was adopted.
[0063] ②Raise the temperature to 140°C, keep it warm for 1h, then raise the temperature to 150°C, and keep it warm for 1h (keep reflux in this state, without draining). Then take 1 hour to raise the temperature to 180°C, keep it warm for 2 hours, and keep the reaction at this temperature, then keep it under vacuum 0.040MPa for 0.5-1 hour to dehydrate...
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