Low-foam soap-free organic fluorine emulsion and preparation method thereof
A technology of organic fluorine and emulsion, applied in the field of chemical industry, can solve the problems of latex film being easily corroded, air bubbles and pinholes, uneven latex film, etc., to avoid latex film defects, overcome hot stickiness, cold brittleness, high effect
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Embodiment 1
[0034] Add 150g of methyl ethyl ketone into a 1L reaction kettle, raise the temperature to 80°C, add 2g of azobisisobutyronitrile, stir at constant temperature for 10 minutes, and dropwise add a mixture consisting of 20g of behenyl methacrylate and 180g of methacrylic acid. body, dripped in 5 hours; reacted at 80°C for 6 hours, distilled off butanone under reduced pressure, and stopped the reaction. After the temperature of the reactor dropped to room temperature, 209.3g of ammonia water was added (the mass concentration was 35%, the same below, the moles of ammonia water The amount is 209.3×0.35 / 35=2.09mol) and neutralized for 2 hours, and the emulsifier S-1 is obtained after discharging.
Embodiment 2
[0036] Add 100g of butanone into a 1L reaction kettle, raise the temperature to 85°C, add 1g of azobisisobutyronitrile, stir at constant temperature for 15 minutes, and dropwise add a mixed monomer consisting of 100g of n-octyl methacrylate and 100g of maleic acid , dripped in 3 hours; kept at 85°C for 8 hours, distilled off butanone under reduced pressure and stopped the reaction. After the temperature of the reaction kettle dropped to room temperature, 86g of ammonia water was added for neutralization for 1 hour, and the emulsifier S-2 was obtained after discharge.
Embodiment 3
[0038]Add 180g of butanone into a 1L reaction kettle, raise the temperature to 83°C, add 1.4g of azobisisobutyronitrile, stir at constant temperature for 12 minutes, and dropwise add a mixture consisting of 100g of n-octyl methacrylate and 100g of itaconic acid. After 4 hours of dripping; keep warm at 83°C for 7 hours, stop the reaction after removing butanone by distillation under reduced pressure, add 76.9g of ammonia water to neutralize for 1 hour after the temperature of the reaction kettle drops to room temperature, and discharge to obtain emulsifier S-3 .
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