Preparation method of low-temperature-sensitive high-temperature-resistant polyether polyol

[0023] Example 1

[0024] Put 330g of xylitol aqueous solution, 95g of trimethylolpropane, and 5g of solid KOH into the reactor, carry out the operation of sealing the reactor and raise the temperature to 100°C, and carry out the vacuum dehydration operation to control the moisture content of the material in the reactor to less than 0.1%. Control the temperature in the polymerization kettle at 102±2°C, and continuously add propylene oxide dropwise. During the process, control the actual temperature of the material to react between 102±2°C. All the propylene oxide was added dropwise and matured for 3h. Control the temperature in the kettle to be between 122±2°C, vacuumize and control the pressure in the kettle to be between -0.08 to -0.09MPa, and remove unreacted propylene oxide monomer for 1 hour. Lower the temperature in the reactor to 80±5°C, add 11.75g ​​of phosphoric acid and 85g of water, stir for 1 hour, add 2.62g of magnesium silicate, raise the temperature to 105±5°C, an

[0025] Example 2

[0026] Put 250g of sucrose, 100g of glycerin, and 4.5g of solid KOH into the reactor, carry out the operation of sealing the reactor and raise the temperature to 100°C, and carry out the vacuum dehydration operation to control the moisture content of the material in the reactor to less than 0.1%. Control the temperature in the polymerization kettle at 102±2°C, and continuously add propylene oxide dropwise. During the process, control the actual temperature of the material to react between 102±2°C. All the propylene oxide was added dropwise and matured for 3h. Control the temperature in the kettle to be between 112±2°C, vacuumize and control the pressure in the kettle to be between -0.08 to -0.09MPa, and remove unreacted propylene oxide monomer for 1 hour. Reduce the temperature in the reactor to 80±5°C, add 10.57g of phosphoric acid and 75g of water, stir for 1 hour, add 2.25g of magnesium silicate, raise the temperature to 105±5°C, and control the pressure in

[0027] Example 3

[0028] Put 428.57g of sorbitol aqueous solution, 120g of propylene glycol, and 6.5g of solid KOH into the reactor, carry out the operation of sealing the reactor and raise the temperature to 100°C, and carry out the vacuum dehydration operation to control the moisture content of the material in the reactor to less than 0.1%. Control the temperature in the polymerization kettle at 102±2°C, and continuously add propylene oxide dropwise. During the process, control the actual temperature of the material to react between 102±2°C. All the propylene oxide was added dropwise and matured for 3h. Control the temperature in the kettle to be between 112±2°C, vacuumize and control the pressure in the kettle to be between -0.08 to -0.09MPa, and remove unreacted propylene oxide monomer for 1 hour. Reduce the temperature in the reactor to 80±5°C, add 15.27g of phosphoric acid and 104.57g of water, stir for 1 hour, add 3.14g of magnesium silicate, raise the temperature to 105