A kind of high molecular weight polytetrafluoroethylene dispersed resin and preparation method thereof
A polytetrafluoroethylene and dispersing resin technology, applied in the chemical industry, can solve the problems of general resin molecular weight level, difficult to meet the high-strength large-scale product processing equipment, etc., and achieve the effects of uniform appearance, not easy to break, and good air permeability
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Embodiment 1
[0033] Clean the 50L stainless steel reaction kettle, add 32L of deionized water, 0.15g of potassium bromate, 2g of succinic acid, 8g of perfluorooctanoic acid ammonium, and 2kg of paraffin. content, when the oxygen content is less than or equal to 30ppm, it is qualified. After the oxygen analysis is qualified, 5 g of perfluorobutylethylene (modifier) is added through a metering pump. The temperature of the reaction kettle is raised to 70±1°C, and the gas-phase monomer tetrafluoroethylene is put into the kettle until the pressure inside the kettle is 2.5MPa, and 0.1g of sodium sulfite (reducing initiator) is added through a metering pump (diluted with 2L of deionized water), and another metering The pump continuously drips sodium sulfite with a concentration of 0.5g / L, and a total of 0.6g is added dropwise. During the reaction, the pressure in the kettle was maintained at 2.5MPa, and the temperature was 70-75°C. According to the change of the polymerization reaction speed,...
Embodiment 2
[0035] Clean the 50L stainless steel reaction kettle, add 32L of deionized water, 0.15g of potassium bromate, 2g of succinic acid, 8g of perfluorooctanoic acid ammonium, and 2kg of paraffin. content, when the oxygen content is less than or equal to 30ppm, it is qualified. After passing the oxygen analysis, 2.5 g of perfluorobutylethylene (modifier) was added through a metering pump. The temperature of the reaction kettle is raised to 70±1°C, and the gas-phase monomer tetrafluoroethylene is put into the kettle until the pressure inside the kettle is 2.5MPa, and 0.1g of sodium sulfite (reducing initiator) is added through a metering pump (diluted with 2L of deionized water), and another metering The pump continuously drips sodium sulfite with a concentration of 0.5g / L, and a total of 0.6g is added dropwise. During the reaction, the pressure in the kettle was maintained at 2.5MPa, and the temperature was 70-75°C. According to the change of the polymerization reaction speed, t...
Embodiment 3
[0037]Clean the 50L stainless steel reaction kettle, add 32L of deionized water, 0.15g of potassium bromate, 2g of succinic acid, 8g of perfluorooctanoic acid ammonium, and 2kg of paraffin. content, when the oxygen content is less than or equal to 30ppm, it is qualified. After the oxygen analysis is qualified, 1 g of perfluorobutylethylene (modifier) is added through a metering pump. The temperature of the reaction kettle is raised to 70±1°C, and the gas-phase monomer tetrafluoroethylene is put into the kettle until the pressure inside the kettle is 2.5MPa, and 0.1g of sodium sulfite (reducing initiator) is added through a metering pump (diluted with 2L of deionized water), and another metering The pump continuously drips sodium sulfite with a concentration of 0.5g / L, and a total of 0.6g is added dropwise. During the reaction, the pressure in the kettle was maintained at 2.5MPa, and the temperature was 70-75°C. According to the change of the polymerization reaction speed, ...
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