PMMA-aluminum hydroxide-organophosphorus acrylic composite base material and preparation method thereof

[0022] S1. Add 80 kg of 20-micron aluminum hydroxide powder into the mixing mixer. When the temperature of the aluminum hydroxide powder reaches 90-120°C, directly add the methacryloyl silane coupling agent in 0.4 kg of silane coupling agent: 3 -(Methacryloyloxy)propyltrimethoxysilane KH570 (Guangzhou Zhongjie Chemical Technology Co., Ltd.), 0.4 kg isopropyl tris(dioctylpyrophosphate acyloxy) titanate coupling agent PN- 41B (Nanjing Pinning Coupling Agent Co., Ltd.) was added and mixed continuously for 20 minutes to prepare superfine aluminum hydroxide microspheres with surface hydrophobic modification;

[0023] S2. Add 95 kilograms of methyl methacrylate, 1 kilogram of methacrylic acid as a comonomer, 1.5 kilograms of ethylene glycol dimethacrylate and 2.5 kilograms of phosphorus-containing methacrylate into the polymerization reactor. At 65-75°C, start to add 20 grams of azobisisobutyronitrile initiator for polymerization reaction, and keep the temperature in the kettle at 80-9

[0026] S1. Add 90 kg of 30-micron aluminum hydroxide powder into the mixing mixer. When the temperature of the aluminum hydroxide powder reaches 90-120°C, directly add 0.5 kg of vinyltrimethoxyethoxysilane A172 (Guangzhou Zhongjie Chemical Co., Ltd. Technology Co., Ltd.), 0.5 kg of isopropyl tris (dioctyl pyrophosphate acyloxy) titanate coupling agent PN-41B (Nanjing Pinning Coupling Agent Co., Ltd.) was added and continuously mixed for 30 minutes to obtain Surface hydrophobic modified aluminum hydroxide ultrafine microspheres;

[0027] S2. Add 90 kilograms of methyl methacrylate, 4 kilograms of methacrylic acid as comonomers, 2 kilograms of trimethylolpropane trimethacrylate and 3 kilograms of phosphorus-containing methacrylate into the polymerization reactor, and when the reactor When internally heated to 65-75°C, start to add 15 grams of azobisisobutyronitrile initiator for polymerization reaction, and keep the temperature in the kettle at 80-90°C for about 2 hours to obtain 1

[0030] S1. Add 100 parts of 20-micron aluminum hydroxide powder into the mixing mixer. When the temperature of the aluminum hydroxide powder reaches 90-120°C, add 2 parts of vinyltrimethoxyethoxysilane coupling agent A172 (Guangzhou City Center Jie Chemical Technology Co., Ltd.), 2 parts of isopropyl tris (dioctyl pyrophosphate acyloxy) titanate coupling agent PN-41B (Nanjing Pinning Coupling Agent Co., Ltd.) were added to the aluminum hydroxide powder and continuously Mix and stir for 10-30 minutes to prepare surface hydrophobic modified aluminum hydroxide ultrafine microspheres;

[0031] S2. Add 75 parts of methyl methacrylate, 10 parts of methacrylic acid, 5 parts of ethylene glycol dimethacrylate and 10 parts of phosphorus-containing methacrylate into the polymerization reaction kettle. When the kettle is heated to 65-75 At ℃, start to add 200g of azobisisobutyronitrile initiator for polymerization reaction, and keep the temperature in the kettle at 80-95℃ for about 2.5 hours