Method and application for preparing degradable coating material by ammonolysis modified vegetable oil
A technology for modifying vegetable oil and coating material, which is applied in the field of fertilizer coating material preparation, and can solve the problems of difficult separation of vegetable oil molecules without double bonds, weakening of the slow and controlled release of finished products, and affecting the appearance of products, etc.
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preparation Embodiment 1
[0024] Preparation of modified vegetable oil: under the protection of nitrogen, 20 grams of diethanolamine was added to 100 grams of soybean oil, heated in a water bath to 60° C., the reaction process was stirred continuously, the reaction was stopped for 20 minutes, and cooled for later use.
[0025] Preparation of coating material: Add 20 grams of isophorone diisocyanate and 70 grams of polyoxypropylene glycol into 100 grams of the above-mentioned modified vegetable oil, keep warm in a water bath to 70°C, react for 60 minutes, and cool to 30°C. Add 0.2 g of chain extender diethylene glycol, and then add 0.15 g of stannous octoate catalyst, react in a 70°C water bath for 30 minutes, and cool down to 30°C. Add 10 g of N-methyldiethanolamine and react at 60° C. for 60 minutes.
[0026] Coating: First, put urea granules in the drum, and gradually heat the temperature of urea granules from room temperature to 45°C under the rotation of the drum. During the gradual heating process...
preparation Embodiment 2
[0029] Preparation of modified vegetable oil: under the protection of nitrogen, add 20 grams of diethanolamine to 100 grams of soybean oil, heat in a water bath at 60°C, keep stirring during the reaction, react for 30 minutes, stop, and cool for later use.
[0030] Preparation of coating material: Add 30 grams of isophorone diisocyanate and 100 grams of polyoxypropylene diol to 100 grams of modified vegetable oil, keep warm in a water bath to 80°C, react for 90 minutes, and cool to 50°C. Add 0.2 g of chain extender diethylene glycol, and then add 0.15 g of stannous octoate catalyst, react in a 70°C water bath for 40min, and cool down to 40°C. Add 15 g of N-methyldiethanolamine and react at 50° C. for 60 minutes.
[0031] Coating: First, put urea granules in the drum, and gradually heat the temperature of urea granules from room temperature to 45°C under the rotation of the drum. During the gradual heating process, evenly spray 0.4% urea-formaldehyde solution on the surface of ...
preparation Embodiment 3
[0034] Preparation of modified vegetable oil: under nitrogen protection, add 10 grams of diethanolamine to 100 grams of soybean oil, heat in a water bath at 40°C, keep stirring during the reaction, react for 20 minutes, stop, and cool for later use.
[0035] Preparation of coating material: Add 20 grams of isophorone diisocyanate and 80 grams of polyoxypropylene diol to 100 grams of modified vegetable oil, keep warm in a water bath to 90°C, react for 150min, and cool to 50°C. Add 0.2 g of chain extender diethylene glycol, and then add 0.15 g of stannous octoate catalyst, react in a 70°C water bath for 60 minutes, and cool down to 50°C. Add 20 g of N-methyldiethanolamine and react at 70° C. for 60 minutes.
[0036] Coating: First, put urea granules in the drum, and gradually heat the temperature of urea granules from room temperature to 45°C under the rotation of the drum. During the gradual heating process, evenly spray 0.4% urea-formaldehyde solution on the surface of fertili...
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