Low-viscosity fast curing UV polyester acrylate and preparation technology thereof
A polyester acrylate, fast curing technology, applied in the direction of polyester coatings, coatings, etc., can solve the problems of slow curing and high viscosity, and achieve the effect of fast curing, low viscosity and high reactivity
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[0027] Example 1
[0028] (1) Put 20 parts of maleic anhydride, 10.1 parts of phthalic anhydride, 5.8 parts of deionized water and 0.1 part of hypophosphorous acid into the reaction kettle in sequence, and react at 110-120°C for 0.5 hours;
[0029] (2) Add 30 parts of dicyclopentadiene dropwise for 1.5 hours to react, and keep it at 120°C for 2.5 hours after dropping;
[0030] (3) Put 20 parts of diethylene glycol, 14.4 parts of pentaerythritol, 8 parts of fumaric acid and 1.5 parts of toluene, raise the temperature to 200°C, keep the system at 200°C, and measure the acid value of the reaction system until the acid value of the reaction system is less than 30mgKOH / g;
[0031] (4) Keep the vacuum degree not less than minus 0.085MPa, and continue to cool down to 90°C after the toluene is drawn out in vacuum to obtain unsaturated polyester;
[0032] (5) In terms of weight percentages, 70% by weight of unsaturated polyester, 15% by weight of acrylic monomer, 13.5% by weight of epichlorohy...
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[0035] Example 2
[0036] (1) Put 20 parts of maleic anhydride, 10.1 parts of phthalic anhydride, 5.8 parts of deionized water and 0.1 part of hypophosphorous acid into the reaction kettle in sequence, and react at 110-120°C for 0.5 hours;
[0037] (2) Add 30 parts of dicyclopentadiene dropwise for 1.5 hours to react, and keep it at 120°C for 2.5 hours after dropping;
[0038] (3) Put 20 parts of diethylene glycol, 14.4 parts of pentaerythritol, 8 parts of fumaric acid and 1.5 parts of toluene, raise the temperature to 200°C, keep the system at 200°C, and measure the acid value of the reaction system until the acid value of the reaction system is less than 30mgKOH / g;
[0039] (4) Keep the vacuum degree not less than minus 0.085MPa, and continue to cool down to 90°C after the toluene is drawn out in vacuum to obtain unsaturated polyester;
[0040] (5) In terms of weight percentage, that is, 72wt% of unsaturated polyester, 15wt% of acrylic monomer, 12wt% of epichlorohydrin, 0.5wt% of ca...
Example Embodiment
[0043] Example 3
[0044] (1) Put 20 parts of maleic anhydride, 10.1 parts of phthalic anhydride, 5.8 parts of deionized water and 0.1 part of hypophosphorous acid into the reaction kettle in sequence, and react at 110-120°C for 0.5 hours;
[0045] (2) Add 30 parts of dicyclopentadiene dropwise for 1.5 hours to react, and keep it at 120°C for 2.5 hours after dropping;
[0046] (3) Put 20 parts of diethylene glycol, 14.4 parts of pentaerythritol, 8 parts of fumaric acid and 1.5 parts of toluene, raise the temperature to 200°C, keep the system at 200°C, and measure the acid value of the reaction system until the acid value of the reaction system is less than 30mgKOH / g;
[0047] (4) Keep the vacuum degree not less than minus 0.085MPa, and continue to cool down to 90°C after the toluene is drawn out in vacuum to obtain unsaturated polyester;
[0048] (5) In terms of weight percentages, 70% by weight of unsaturated polyester, 15% by weight of acrylic monomer, 13.5% by weight of epichlorohy...
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