Water-based resin for housing paint and preparation method of water-based resin
A water-based resin and casing technology, applied in coatings, polyester coatings, etc., can solve problems such as inability to use in large quantities, short salt spray resistance time, poor alcohol resistance, etc., achieve excellent adhesion, improve gloss and Weather resistance, increased flexibility and gloss effects
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preparation Embodiment 1
[0028] Add 100kg of terephthalic acid, 50kg of hexanediol, 450kg of trimethylolpropane and 5kg of ultraviolet absorber UV-2 into the reactor. Then, nitrogen gas was charged into the reactor for nitrogen protection, and the reaction mixture was heated to 150° C. under nitrogen protection. Then maintain this temperature for 1 hour, then raise the temperature of the system to 200° C. at a heating rate of 0.35° C. / min, then raise the temperature of the system to 230° C. at a heating rate of 0.2° C. / min and keep it warm. During the heat preservation reaction, the acid value of the reaction system was detected by sampling every half hour until the acid value of the reaction system was 6.5 mgKOH / g, at which time the reaction system became transparent. Afterwards, the temperature of the reaction system is cooled to 140° C., followed by adding 150 kg coconut oil acid, 100 kg isophthalic acid and 50 kg benzoic acid, and then the temperature of the reaction system is raised to 200° C. at...
preparation Embodiment 2
[0030]Add 100kg of terephthalic acid, 50kg of hexanediol, 450kg of trimethylolpropane and 5kg of ultraviolet absorber UV-2 into the reactor. Then, nitrogen gas was charged into the reactor for nitrogen protection, and the reaction mixture was heated to 160° C. under nitrogen protection. Then maintain this temperature for 1 hour, then raise the temperature of the system to 210°C at a heating rate of 0.4°C / min, and then raise the temperature of the system to 240°C at a heating rate of 0.25°C / min and keep it warm. During the heat preservation reaction, the acid value of the reaction system was detected by sampling every half hour until the acid value of the reaction system was 6.5 mgKOH / g, at which time the reaction system became transparent. Afterwards, the temperature of the reaction system is cooled to 150° C., followed by adding 150 kg of coconut oil, 100 kg of isophthalic acid and 50 kg of benzoic acid, and then the temperature of the reaction system is raised to 210° C. at ...
preparation Embodiment 3
[0032] Add 100kg of terephthalic acid, 50kg of hexanediol, 450kg of trimethylolpropane and 5kg of ultraviolet absorber UV-2 into the reactor. Then, nitrogen gas was charged into the reactor for nitrogen protection, and the reaction mixture was heated to 170° C. under nitrogen protection. Then maintain this temperature for 1 hour, then raise the temperature of the system to 220°C at a heating rate of 0.45°C / min, and then raise the temperature of the system to 250°C at a heating rate of 0.3°C / min and keep it warm. During the heat preservation reaction, the acid value of the reaction system was detected by sampling every half hour until the acid value of the reaction system was 6.5 mgKOH / g, at which time the reaction system became transparent. The temperature of reaction system is cooled to 160 ℃ afterwards, then add 150kg coconut oil acid, 100kg isophthalic acid and 50kg benzoic acid, then the temperature of reaction system is raised to 220 ℃ under the heating rate of 0.3 ℃ / min ...
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