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High-temperature-resistant polyether polyol and preparation method thereof

A technology of polyether polyol and high temperature resistance, which is applied in the field of high temperature resistant polyether polyol and its preparation, which can solve the problems of performance degradation and achieve the effects of good heat resistance, good adhesion and high functionality

Inactive Publication Date: 2012-10-03
ZIBO DEXIN LIANBANG CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rigid foam produced by ordinary polyether is only suitable for occasions below 100°C. If it is used in a high temperature environment for a long time, its performance will be significantly reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Prepare high temperature resistant polyether polyol according to the following steps:

[0015] (1) According to parts by weight, vacuum inhale 890 parts of sorbitol with a mass concentration of 70%, 460 parts of sucrose, and 15 parts of potassium hydroxide into the polymerization kettle, replace with nitrogen three times, and add 1044 parts of propylene oxide when the temperature is raised to 70°C , the reaction temperature is controlled at 85°C, and the pressure is ≤0.3mpa;

[0016] (2) Aging for 3 hours, then heating up and dehydrating after aging, and controlling the temperature to ≤105°C;

[0017] (3) When dehydrated to a moisture content of ≤0.3%, that is, the moisture content is qualified, then add 2436 parts of propylene oxide, control the temperature at 105°C, and the pressure ≤0.25mpa, and mature for 3 hours;

[0018] (4) Cool down to 85°C after aging, inhale 28 parts of phosphoric acid and 140 parts of water for neutralization, dehydrate and dry after neutral...

Embodiment 2

[0022] Prepare high temperature resistant polyether polyol according to the following steps:

[0023] (1) According to parts by weight, vacuum inhale 900 parts of sorbitol with a mass concentration of 70%, 500 parts of sucrose, and 16 parts of potassium hydroxide into the polymerization kettle, replace with nitrogen three times, and add 1080 parts of propylene oxide when the temperature is raised to 70°C , the reaction temperature is controlled at 87°C, and the pressure is ≤0.3mpa;

[0024] (2) Aging for 3 hours, then heating up and dehydrating after aging, and controlling the temperature to ≤105°C;

[0025] (3) When dehydrated to a moisture content of ≤0.3%, that is, the moisture content is qualified, then add 2520 parts of propylene oxide, control the temperature at 110°C, and the pressure ≤0.25mpa, and mature for 3 hours;

[0026] (4) Cool down to 85°C after aging, inhale 30.5 parts of phosphoric acid and 180 parts of water for neutralization, dehydrate and dry after neutr...

Embodiment 3

[0030] Prepare high temperature resistant polyether polyol according to the following steps:

[0031] (1) According to parts by weight, vacuum inhale 910 parts of sorbitol with a mass concentration of 70%, 450 parts of sucrose, and 13 parts of potassium hydroxide into the polymerization kettle, replace with nitrogen three times, and add 1077 parts of propylene oxide when the temperature is raised to 70°C , the reaction temperature is controlled at 90°C, and the pressure is ≤0.3mpa;

[0032] (2) Aging for 3 hours, then heating up and dehydrating after aging, and controlling the temperature to ≤105°C;

[0033] (3) When dehydrated to a moisture content of ≤0.3%, that is, the moisture content is qualified, then add 2513 parts of propylene oxide, control the temperature at 113°C, and the pressure ≤0.25mpa, and mature for 3 hours;

[0034] (4) Cool down to 85°C after aging, inhale 25.1 parts of phosphoric acid and 200 parts of water for neutralization, dehydrate and dry after neutr...

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Abstract

The invention belongs to the field of chemical synthesis, and particularly relates to high-temperature-resistant polyether polyol and a preparation method thereof. The high-temperature-resistant polyether polyol is characterized by being prepared from the following components in parts by weight: 600-1,000 parts of sorbierite, 300-600 parts of cane sugar, 3,300-3,800 parts of epoxy propane, 10-18 parts of potassium hydroxide, 20-36 parts of phosphoric acid and 140-200 parts of water. The method has the advantages: the prepared high-temperature-resistant polyether polyol is catalyzed by using potassium hydroxide; sorbierite is an ideal starting agent for preparing temperature-resistant polyether; and the polyether polyol synthesized by adopting sorbierite and cane sugar with high functionality has high functionality and low hydroxyl value. Hard urethane foam plastic prepared from polyether polyol has high heat resistance, high size stability, thermal oxidation resistance, oil resistance, bonding property and high size stability.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a high-temperature-resistant polyether polyol and a preparation method thereof. Background technique [0002] Rigid polyurethane foam has some good properties, such as low density, low thermal conductivity, good strength, and strong adhesion with other materials. It is an excellent thermal insulation material that is easy to form and convenient to construct. However, the rigid foam produced by ordinary polyether is only suitable for occasions below 100°C, and its performance will be significantly reduced if it is used in a high temperature environment for a long time. When used in special fields such as heat transfer pipeline insulation, high temperature disinfection, etc., hard foam products need to withstand higher temperatures, generally requiring a temperature resistance of 150°C. Contents of the invention [0003] The object of the present invention is to pro...

Claims

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Application Information

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IPC IPC(8): C08G65/28
Inventor 耿佃勇荆晓东王国强
Owner ZIBO DEXIN LIANBANG CHEM IND
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