Alkyd resin for high-solid low-viscosity PU (polyurethane) matte topcoat and preparation method of alkyd resin
A high-solid, low-viscosity, alkyd resin technology, applied in coatings, polyester coatings, etc., can solve problems such as environmental pollution, air pollution, and high VOC, and achieve good adhesion, good matting, and good leveling Effect
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[0018] Example 1
[0019] Add 24.77g of soybean oil fatty acid, 15.13g of pentaerythritol, 0.11g of hypophosphorous acid, and 4.13g of xylene into a four-necked flask with a stirring device in order, stir evenly, and raise the temperature. It takes 1 hour to heat up to 205°C, heat preservation and reaction for 1 hour, then Cool down to below 190°C, add 5.26g neopentyl glycol, 5.77g diethylene glycol, 0.61g maleic anhydride, 27.79g phthalic anhydride, continue to increase the temperature, react at 200°C, until the acid value 14mgKOH / g, viscosity 500mpa.s / 25°C, then lower the temperature to below 150°C, add 16.43g butyl acetate, stir evenly for 0.5 hours, and discharge.
Example Embodiment
[0020] Example 2
[0021] Add 28.66g of soybean oil fatty acid, 14.99g of pentaerythritol, 0.14g of hypophosphorous acid, and 4g of xylene into a four-necked flask with a stirring device in order, stir evenly, raise the temperature, and use 1.5 hours to heat up to 210°C, keep warm for 1.5 hours, and then cool Cool down to below 190°C, add 4.82g neopentyl glycol, 5.50g diethylene glycol, 26.89g phthalic anhydride, continue to increase the temperature, react at 200°C until the acid value is 13mgKOH / g and the viscosity is 400mpa.s / 25°C, then lower the temperature to below 150°C, add 15g of xylene, stir evenly for 0.5 hours, and discharge.
Example Embodiment
[0022] Example 3
[0023] Add 30.6g of soybean oil fatty acid, 14.46g of pentaerythritol, 0.14g of hypophosphorous acid, and 3.94g of xylene into a four-necked flask with a stirring device in order, stir evenly, and raise the temperature. It takes 1 hour to heat up to 215°C, keep warm for 1.6 hours, and then Cool down to below 190 degrees, add 4.95g neopentyl glycol, 5.22g diethylene glycol, 24.9g phthalic anhydride, continue to increase the temperature, and react at 200°C until the acid value is 14mgKOH / g and the viscosity is 600mpa.s / 25°C, then lower the temperature to below 150°C, add 15.79g ethyl acetate, stir evenly for 0.5 hours, and discharge.
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