Water-in-oil temperature controllable slow-release microcapsule and preparation method thereof
A technology of microcapsules and water-in-oil, applied in the direction of microcapsule preparation, microsphere preparation, etc., can solve the problem of losing the effect of sustained release, the effect of sustained release of microcapsules cannot be guaranteed, and the capsule shell of microcapsules cannot maintain the normal shape and other problems, to achieve the effect of dense shell structure, good sealing performance, and guaranteed properties of the capsule core
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[0019] Example 1:
[0020] Select vinylidene chloride 9g, acrylonitrile 4.5g, methyl methacrylate 3.8g, trifunctional acrylate 0.7g, azobisisobutyronitrile 1g, water-soluble essence 9g, melamine prepolymer 18g, PVA 5g, diisobutyronitrile 150g of propylbenzene, 5g of polypropylene, 1.5g of sodium dodecylbenzenesulfonate, 800.3g of span, and 1.0g of hexadecanol were put into a 500ml three-necked flask, homogenized under a homogenizer at 15,000 rpm for 10 minutes, followed by stirring and Condensation reflux device, the material is kept at 25°C for 8 hours, and after 65°C is kept at 65°C for 24 hours, filtered, and the filter cake is rinsed twice with n-heptane and dried at 60°C to constant weight to obtain 35g of solid powder (particle size 10-50 μm). The microcapsules have sustained release effect when heated to 90°C.
Example Embodiment
[0021] Example 2:
[0022] Select acrylonitrile 13g, methyl methacrylate 3.8g, trifunctional acrylate 0.7g, methyl acrylate 0.5g, azobisisobutyronitrile 1g, ethylene glycol 9g, melamine prepolymer 16g, PVA5g, diisopropyl 150g of benzene, 5g of polypropylene, 1.2g of sodium dodecylbenzenesulfonate, 0.3g of Tween, and 1.0g of hexadecanol were put into a 500ml three-necked flask, homogenized at 15,000 rpm for 8 minutes under a homogenizer, followed by stirring And condensation reflux device, the material is kept at 20 °C for 8 hours, and after 65 °C insulation for 30 hours, filtered, and the filter cake is rinsed with n-heptane for 3 times and dried at 60 °C to constant weight to obtain 35g of solid powder (particle size 10-50μm), The microcapsules have sustained release effect when heated to 150°C.
Example Embodiment
[0023] Example 3:
[0024] Select acrylonitrile 3g, methyl methacrylate 14g, trifunctional acrylate 0.5g, methyl acrylate 0.5g, azobisisobutyronitrile 1g, water-soluble pesticide 9g, melamine prepolymer 18g, PVA 5g, diisopropyl 150g of benzene, 5g of polypropylene, 1.3g of sodium dodecylbenzenesulfonate, 800.3g of span, and 1.0g of hexadecanol were put into a 500ml three-necked flask, homogenized at 15,000 rpm for 8 minutes under a homogenizer, followed by stirring and Condensation reflux device, the material is kept at 10°C for 8 hours, and then kept at 65°C for 48 hours, filtered, and the filter cake is rinsed with n-heptane 3 times and dried at 60°C to constant weight to obtain 37g of solid powder (particle size 10-50 μm), micro The capsules have a sustained release effect when heated to 180°C.
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