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Method for synthesizing high activity rigid foam polyether polyatomic alcohol for spraying

A technology of polyether polyol and synthesis method, which is applied in the field of synthesis of high-activity rigid polyether polyol for spraying, and can solve the problems of volatile construction personnel injury, the ratio of amine to ether should not be too high, and the increase of the viscosity of combined polyether, etc. , to achieve the effect of enhancing competitiveness, low cost and improving performance

Inactive Publication Date: 2009-06-24
SHANDONG BLUSR DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The proportion of amine ether in the combined polyether should not be too high, because the viscosity of the amine ether is very high (viscosity greater than 50000mPa·s25°C), resulting in an increase in the viscosity of the combined polyether, which is not conducive to construction. At the same time, it is affected by the price of ethylenediamine. The price of amine ether is expensive, leading to an increase in the overall cost of materials;
[0005] 2. Since the proportion of amine ether should not be too high, in order to improve the activity of the material, only a large amount of catalyst can only be added, and the volatility and toxicity of the catalyst will cause harm to the body of the construction workers, making the construction environment worse

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 124.4g sucrose, 77.2g diethylene glycol, and 201.6g urea to a 3-liter stainless steel kettle for nitrogen replacement. After measuring the oxygen content in the kettle is less than 100ppm, vacuumize to -0.098Mpa, and draw in 20g dimethylethanolamine and 20g of hexadecyl tertiary amine, heat up to 80°C, start to add propylene oxide, keep the temperature in the kettle at 100-110°C, and the pressure at 0.1-0.4Mpa, continuously add 1556.8g of propylene oxide, after the feeding of propylene oxide, the internal pressure After reacting for 2 hours, the unreacted propylene oxide was removed in a vacuum, and the product polyether polyol A was obtained by cooling and discharging. The analysis indexes are as follows: hydroxyl value 475mgKOH / g moisture: 0.11% viscosity 2500mpa.s / 25°C pH value: 11.2.

Embodiment 2

[0019] Add 124.4g of sucrose, 77.2g of diethylene glycol, 67.2g of ethylenediamine, and 134.4g of urea into a 3-liter stainless steel kettle for nitrogen replacement. After measuring the oxygen content in the kettle is less than 100ppm, vacuumize to -0.098Mpa and pump it in airtight 20g dimethylethanolamine and 20g hexadecyl tertiary amine, heat up to 80°C, start adding propylene oxide, keep the temperature in the kettle at 100-110°C, pressure 0.1-0.4Mpa, continuously add 1556.8g propylene oxide, propylene oxide enters After the material is finished, the internal pressure is reacted for 2 hours, the unreacted propylene oxide is removed in a vacuum, and the product polyether polyol B can be obtained after cooling down and discharging. The analysis indicators are as follows: hydroxyl value 490mgKOH / g, moisture: 0.08%, viscosity 3700mpa.s / 25°C, pH value: 11.8.

Embodiment 3

[0021] Add 124.4g sucrose, 77.2g diethylene glycol, and 201.6g urea to a 3-liter stainless steel kettle for nitrogen replacement. After measuring the oxygen content in the kettle is less than 100ppm, vacuumize to -0.098Mpa, and draw in 20g dimethylethanolamine and 20g hexadecyl tertiary amine, heat up to 80°C, start adding the mixture of propylene oxide and ethylene oxide, keep the temperature in the kettle at 100-110°C, and the pressure 0.1-0.4Mpa, continuously add 1323.3g propylene oxide and 233.5g epoxy After the ethylene mixture, propylene oxide and ethylene oxide mixture are fed, the internal pressure is reacted for 2 hours, the unreacted propylene oxide and ethylene oxide are removed in a vacuum, and the product polyether C can be obtained after cooling down and discharging. . The analysis indicators are as follows: hydroxyl value 495mgKOH / g moisture: 0.12%, viscosity 2400mpa.s / 25°C, pH value: 11.5.

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Abstract

The invention discloses a synthetic method of a high-activity rigid foam polyether polyol. In the method, a mixed initiator is polymerized with an epoxy compound at the pressure of 0-0.5MPa and the temperature of 50-150 DEG C by taking an amine compound as a catalyst to obtain the polyether polyol; the mixed initiator consists of a polyol compound and a urea compound or consists of the polyol compound, a polyamine compound and the urea compound, and the urea compound accounts for 30-70% of the total weight of the mixed initiator in the mixed initiator. The polyether polyol synthesized by the method is characterized by high activity, low viscosity and low cost, can be used for the preparation of rigid polyurethane foam, and is especially applicable to the preparation of spraying polyurethane.

Description

technical field [0001] The invention relates to a method for synthesizing high-activity rigid polyether polyol for spraying. The polyether polyol can be used in the preparation of rigid polyurethane foam, and is particularly suitable for the preparation of rigid polyurethane foam for spraying. Background technique [0002] Rigid polyurethane foam has the characteristics of good thermal insulation effect, high specific strength, electrical properties, chemical resistance and sound insulation effect, and is widely used as thermal insulation materials, structural materials and imitation wood materials. Because of its excellent thermal insulation performance and flexible construction methods, rigid polyurethane foam has been involved in various fields such as construction, petrochemical industry, home appliances, refrigeration, shipbuilding, automobiles, aviation, machinery, and instruments. According to the molding process, it can generally be divided into pouring type and spra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G18/50C08G101/00
Inventor 刘小会李兆星何恒海郭辉姜永获
Owner SHANDONG BLUSR DONGDA CHEM
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