Method for preparing core-shell structural 'inorganic powder-elastomer'
A technology of inorganic powder and shell structure, which is applied in the field of preparation of "inorganic powder-elastomer" composite materials, which can solve the problems of harsh reaction conditions, poor solvent resistance, and no chemical bonds, etc., and achieve simple treatment process and modification effect Good and wide applicability
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example 1
[0025] preprocessing
[0026] 100 kg of dried nano-CaCO 3 Add it into a high-speed mixer with a barrel temperature of 60°C, stir for 10 minutes, and then add 3 kg of methacrylic acid and azobisisobutyronitrile. After stirring for 60min, discharge.
[0027] compound mixing
[0028] Plasticize 50 kg of EPDM rubber at 70°C on an open rubber mixer, and gradually add pretreated nano-calcium carbonate to evenly disperse it in the rubber material, continue mixing for 20 minutes, take out the sheet, and use a pulverizer after cooling Pulverize to obtain "inorganic powder-elastomer" nano-calcium carbonate particles with a core-shell structure.
example 2
[0030] preprocessing
[0031] Add 100 kg of dried 1000-mesh calcium oxide into a high-speed mixer with a barrel temperature of 30°C, stir for 7 minutes, add 4 kg of maleic anhydride and dibenzoyl peroxide, stir for 10 minutes, and then discharge.
[0032] compound mixing
[0033] Directly mix and knead the nano-calcium carbonate and 20 kg of butadiene rubber at 50° C. on an open rubber mixing machine, and then make tablets and crush them. Mix the rubber material particles with 400 kg of polypropylene, and extrude with a twin-screw extruder to prepare a PP / butadiene rubber / calcium oxide ternary composite material.
example 3
[0035] preprocessing
[0036] Add 100 kg of 1250-mesh calcium hydroxide that has been dried into a high-speed mixer with a cylinder temperature of 80°C, stir for 3 minutes, and then add 3.4 kg of chloroacrylic acid, 1.0 kg of azobisisobutyronitrile and 600 mL of ethanol. After stirring for 30min, discharge.
[0037] compound mixing
[0038] Mix the pretreated calcium hydroxide with 160 kg of isoprene rubber directly on an open rubber mixer at 70°C and knead evenly, then take out the flakes and crush them to obtain the "inorganic powder-elastomer" with a core-shell structure. Hydroxide calcium particles.
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