Method for synthesizing sulfur-containing silane copolymer with low VOC (volatile organic compounds) emission
A technology of sulfur-containing silane and synthesis method, which is applied in the field of silane coupling agent production, can solve the problems of high production cost, fast heat generation of rubber compound, poor dispersion of silica, and achieves good product quality and safety, and VOC emission. The effect of reduced volume and low production cost
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Embodiment 1
[0031] 536g of 3-mercaptopropyltriethoxysilane and 1003g of end-capped sulfur-containing silane are added together into a 3000ml glass reaction flask with electromagnetic stirring, thermometer, oil bath heating and reflux condenser; wherein the oil bath heating is controlled At 90°C, the cooling water temperature of the reflux condenser was controlled at 10°C; then 1g of hydrochloric acid, 72g of deionized water and 400g of ethanol were mixed evenly and added to a 500ml glass constant pressure dropping funnel. Turn on the stirring, set the stirring speed to 300 revolutions per minute, add the mixture of hydrochloric acid, deionized water and ethanol dropwise into the flask at 60°C for reaction, finish the dropwise addition in 4 hours, and continue the reaction for 2 hours after the dropwise addition.
[0032] After the reaction is completed, the material in the glass reaction flask is subjected to vacuum distillation, the distillation temperature is set at 60°C, and the vacuum ...
Embodiment 2
[0034] Add 536g of 3-mercaptopropyltriethoxysilane and 1003g of blocked sulfur-containing silane into a 3000ml glass reaction flask with electromagnetic stirring, thermometer, oil bath heating and reflux condenser, wherein the oil bath heating controls At 95°C, the cooling water temperature of the reflux condenser is controlled at 9°C. Then 1g of hydrochloric acid, 72g of deionized water and 400g of ethanol were mixed evenly and added to a 500ml glass constant pressure dropping funnel. Turn on the stirring, set the stirring speed to 290 rpm, add the mixture of hydrochloric acid, deionized water and ethanol dropwise to the flask at 70°C for reaction, the dropwise addition is completed in 3 hours, and the reaction is continued for 1.5 hours after the dropwise addition.
[0035] After the reaction is completed, the material in the glass reaction flask is subjected to vacuum distillation, the distillation temperature is set at 60°C, and the vacuum degree is set at -0.09MPa, and th...
Embodiment 3
[0037] Add 536g of 3-mercaptopropyltriethoxysilane and 1003g of blocked sulfur-containing silane into a 3000ml glass reaction flask with electromagnetic stirring, thermometer, oil bath heating and reflux condenser, wherein the oil bath heating controls At 100°C, the cooling water temperature of the reflux condenser was controlled at 8°C. Then 1g of hydrochloric acid, 72g of deionized water and 400g of ethanol were mixed evenly and added to a 500ml glass constant pressure dropping funnel. Turn on the stirring, set the stirring speed to 250 revolutions per minute, add the mixture of hydrochloric acid, deionized water and ethanol dropwise into the flask at 90°C for reaction, the dropwise addition is completed in 3.5 hours, and the reaction is continued for 1 hour after the dropwise addition.
[0038] After the reaction is completed, the material in the glass reaction flask is subjected to vacuum distillation, the distillation temperature is set at 60°C, and the vacuum degree is s...
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