Fluorinated silicone lube oil synthetic method
A synthesis method and technology of lubricating oil, applied in lubricating compositions, petroleum industry, additives, etc., can solve the problems affecting product quality control and production process, affecting the storage stability of silicone oil products, affecting the catalytic efficiency of catalysts, etc., and achieve excellent comprehensive The effect of performance, short response time and simple post-processing
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[0028] Example 1
[0029] The three-necked reaction flask is equipped with electromagnetic stirring, reflux condenser, thermometer and water bath. The fluorine-containing mixed cyclosiloxane (R 1 , R 2 For methyl, X=2, Y=6) 16g, end-capping agent divinyltetramethyldisiloxane 2.4g (15% of the weight of mixed cyclosiloxane) and 1.92g 95% sulfuric acid are added to the reaction flask in sequence After stirring for 30 minutes, the temperature was raised to 30°C; after 40 hours of reaction, it was cooled to room temperature, 20ml of n-hexane was added, washed with water to neutrality, and then the solvent and low distillate were evaporated to obtain 13.5g of fluorine-containing polysiloxane. The yield was 73.5% . The product is a colorless transparent liquid with a viscosity (-40°C) of 1536.6mm 2 / s, the fluorine content is 44.3%.
Example Embodiment
[0030] Example 2
[0031] The three-necked reaction flask is equipped with electromagnetic stirring, reflux condenser, thermometer and water bath. The fluorine-containing mixed cyclosiloxane (R 1 Is methyl, R 2 Ethyl, X=2, Y=0) 16g, end-capping agent divinyltetramethyldisiloxane 3.2g (20% of the weight of mixed cyclosiloxane) and 0.8g perchloric acid are added to the reaction flask in sequence After 30 minutes of stirring, the temperature was raised to 30°C; after 30 hours of reaction, it was cooled to room temperature, 20ml of n-hexane was added, washed with water to neutrality, and then the solvent and low distillates were evaporated, and 15.6g of fluoropolysiloxane was obtained. The yield was 80.9%. . Product viscosity (-40℃) is 605.9mm 2 / s, the fluorine content is 20.7%.
Example Embodiment
[0032] Example 3
[0033] The three-necked reaction flask is equipped with electromagnetic stirring, reflux condenser, thermometer and water bath. The fluorine-containing mixed cyclosiloxane (R 1 , R 2 Methyl group, X=2, Y=10) 20g, end-capping agent divinyltetramethyldisiloxane 3g and 0.8g95% H 2 SO 4 Add them to the reaction flask one by one, stir for 30 minutes, and then heat to 30°C; after reacting for 30 hours, cool to room temperature, add 20ml of n-hexane, wash with water until neutral, and then distill off the solvent and low distillates to obtain 17g of fluoropolysiloxane solid. The rate is 73.5%. The fluorine content of the product is 56.6%.
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