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Preparation method for full saccharose polyether polyol

A technology of polyether polyol and sucrose, which is applied in the field of preparation of full sucrose polyether polyol, can solve the problems of long reaction cycle, unstable index, poor effect, etc., and achieve low cost, sufficient reaction, and good index stability Effect

Active Publication Date: 2014-10-01
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the traditional process of preparing sucrose as part of the starting agent, the effect of sucrose and KOH catalyst in solid state to form potassium alcohol is poor, the reaction cycle is long, and there is still a large amount of sucrose that has not participated in the reaction until the end of the reaction, resulting in unstable indicators

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  • Preparation method for full saccharose polyether polyol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In a 5L autoclave equipped with a stirrer, a meter, a heating temperature control device, a cooling device (including an outer jacket and an inner coil) and a pressure sensor, add 342g of sucrose, 3.74g of catalyst KOH, and 37.4g of DMI (KOH and DMI Mixed into a solution), replaced with nitrogen 5 times, and vacuumed to a pressure of -0.08MPa, then stirred (500 rpm) to heat up, when the temperature increased to 85°C, 75g of propylene oxide was added, and the reaction temperature was controlled at 85±3°C , the initial pressure is 0.25±0.02Mpa, react until the pressure is constant, then raise the temperature to 95°C and vacuum aging for 3h. Afterwards, the temperature was controlled at 130°C, the pressure was controlled at 0.25MPa, and the remaining 830g of propylene oxide was divided into 10 batches and added successively, and the aging was continued for 1 hour after reacting until the pressure stopped changing. Finally, add 8g of phosphoric acid and 37.5g of water at 95...

Embodiment 2

[0031] In a 5L autoclave equipped with a stirrer, a meter, a heating temperature control device, a cooling device (including an outer jacket and an inner coil) and a pressure sensor, add 342g of sucrose, 3.74g of catalyst KOH, and 62.33g of DMI (KOH and DMI Mixed into a solution), replaced with nitrogen 5 times, and vacuumed to a pressure of -0.08MPa, then stirred (500 rpm) to heat up, when the temperature increased to 85°C, 75g of propylene oxide was added, and the reaction temperature was controlled at 85±3°C , the initial pressure is 0.25±0.02Mpa, react until the pressure is constant, then raise the temperature to 105°C and vacuum aging for 4h. Afterwards, the temperature was controlled at 100°C and the pressure was controlled at 0.25MPa. The remaining 830g of propylene oxide was divided into 10 batches and added successively, and the reaction was continued until the pressure did not change, and then aging was continued for 1h. Finally, add 8g of phosphoric acid and 37.5g o...

Embodiment 3

[0039] In a 5L autoclave equipped with a stirrer, a meter, a heating temperature control device, a cooling device (including an outer jacket and an inner coil) and a pressure sensor, add 342g of sucrose, 3.74g of catalyst KOH, and 112.2g of DMI (KOH and DMI Mixed into a solution), replaced with nitrogen 5 times, and vacuumed to a pressure of -0.08MPa, then stirred (500 rpm) to heat up, when the temperature increased to 85°C, 75g of propylene oxide was added, and the reaction temperature was controlled at 85±3°C , the initial pressure is 0.25±0.02Mpa, react until the pressure is constant, then raise the temperature to 115°C and vacuum aging for 5h. Afterwards, the temperature was controlled at 110°C and the pressure was controlled at 0.30 MPa, and the remaining 830 g of propylene oxide was divided into 10 batches and added successively, and the reaction was continued until the pressure did not change, and then aging was continued for 1 h. Finally, add 8g of phosphoric acid and ...

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Abstract

The invention relates to a preparation method for full saccharose polyether polyol, belonging to the technical field of synthesis of polyether polyol. According to the preparation method, only saccharose is taken as an initiator, a catalyst KOH is solvated by 1, 3-dimethyl-2-imidazolone and then is reacted with epoxypropane. The preparation method for full saccharose polyether polyol improves the alcohol and potassium preparation process. The prepared polyether polyol has high degree of functionality and strength, so that the compound material prepared by the polyether polyol can resist low temperature minus 86DEG C when the normal molding density is about 40Kg / m<3>, the overall injection quantity is about 50% lower than that of a normal hard bubble compound polyether system, and the polyether polyol has low cost and high cost performance, and the use field of hard polyurethane foaming plastics is enlarged.

Description

technical field [0001] The invention relates to a preparation method of full sucrose polyether polyol, belonging to the technical field of polyether polyol synthesis. Background technique [0002] Polyether polyol is the main raw material for the production of rigid polyurethane foam. Its preparation method is to polymerize the initiator with active hydrogen and epoxide under certain pressure, temperature and catalyst. Rigid polyurethane foam has good properties such as low density, low thermal conductivity, and strong adhesion. It is an excellent thermal insulation material with strong advantages in molding and construction. At present, most polyethers are starters mixed with sucrose or sorbitol and other diols or triols, and the prepared combination has a molding density of 40Kg / m 3 It is generally suitable for occasions where the temperature is around -35°C. For special applications, such as low-density ultra-low temperature biological freezers, low-density ultra-low tem...

Claims

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Application Information

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IPC IPC(8): C08G65/28
Inventor 刘军马海晶宁晓龙孙兆仁刘延良
Owner SHANDONG INOV NEW MATERIALS CO LTD
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