Preparation method of low unsaturation degree and high intersolubility high molecular weight polyether polyol

A technology of polyether polyol and high molecular weight, which is applied in the field of preparation of low-unsaturation, high-miscibility, high-molecular-weight polyether polyol, can solve problems such as harsh process requirements, widened molecular distribution, and increased unsaturation, and achieves Effects of narrow molecular weight distribution, reduced regularity, and low degree of unsaturation

Inactive Publication Date: 2016-10-12
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the increase of molecular weight, the side reactions will also increase accordingly, the degree of unsaturation will increase, the molecular distribution will become wider, and the viscosity will increase, which will affect the performance of the product.
[0004] As one of the two most commonly used isocyanates, MD

Method used

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  • Preparation method of low unsaturation degree and high intersolubility high molecular weight polyether polyol
  • Preparation method of low unsaturation degree and high intersolubility high molecular weight polyether polyol

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Add 212g DEG and 1.6g potassium hydroxide to the autoclave at room temperature, and replace with nitrogen. After measuring the oxygen content in the autoclave is less than 100ppm, the temperature is raised to 115°C, and nitrogen vacuum (-0.09MPa) is used to dehydrate for 2 hours. Add 588 g of propylene oxide dropwise to maintain the pressure in the reactor at 0.10-0.15 MPa and the reaction temperature at 115°C. After the reaction was completed, the residual monomer was removed under vacuum at -0.09MPa for 1 hour. Cool down to 80°C, add 3.2g of phosphoric acid and 24g of distilled water, stir for 40 minutes, then add 0.4g of magnesium silicate, stir for 40 minutes, vacuum dehydrate at 110-120°C, -0.09MPa for 2 hours, and filter to obtain the intermediate polyether polyol alcohol.

[0029] Add 300g of intermediate polyether polyol and 0.15g of DMC catalyst into the reactor at room temperature, vacuum dehydrate at -0.093MPa and 110°C for 1.5h, then open the external circu...

Embodiment 2

[0031] Add 76g of propylene glycol and 1.5g of potassium hydroxide to the autoclave at room temperature, and replace with nitrogen. After the oxygen content in the autoclave is measured to be less than 100ppm, the temperature is raised to 115°C, and nitrogen vacuum (-0.09MPa) is used to dehydrate for 2 hours. Add 524 g of propylene oxide dropwise to maintain the pressure in the reactor at 0.10-0.15 MPa and the reaction temperature at 115°C. After the reaction was completed, the residual monomer was removed under vacuum at -0.09MPa for 1 hour. Cool down to 80°C, add 3.0g of phosphoric acid and 24g of distilled water, stir for 40 minutes, then add 0.6g of magnesium silicate, stir for 40 minutes, vacuum dehydrate at 110-120°C, -0.09MPa for 2 hours, and filter to obtain the intermediate polyether polyol alcohol.

[0032] Add 480g of intermediate polyether polyol and 0.384g of DMC catalyst into the reactor at room temperature, vacuum dehydrate at -0.093MPa and 110°C for 1.5h, then...

Embodiment 3

[0034] Add 92g of glycerol and 2.4g of potassium hydroxide to the autoclave at room temperature, and replace with nitrogen. After the oxygen content in the autoclave is less than 100ppm, the temperature is raised to 115°C, and nitrogen vacuum (-0.09MPa) is used to dehydrate for 2 hours. Add 708 g of propylene oxide dropwise to maintain the pressure in the reactor at 0.10-0.15 MPa and the reaction temperature at 115°C. After the reaction was completed, the residual monomer was removed under vacuum at -0.09MPa for 1 hour. Cool down to 80°C, add 4.8g of phosphoric acid and 32g of distilled water, stir for 40 minutes, then add 1.6g of magnesium silicate, stir for 40 minutes, vacuum dehydrate at 110-120°C, -0.09MPa for 2 hours, and filter to obtain the intermediate polyether polyol alcohol.

[0035] Add 400g of intermediate polyether polyol and 0.60g of DMC catalyst into the reactor at room temperature, vacuum dehydrate at -0.093MPa and 110°C for 1.5h, then open the external circu...

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PUM

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Abstract

Belonging to the technical field of polyether polyol synthesis, the invention in particular relates to a preparation method of low unsaturation degree and high intersolubility high molecular weight polyether polyol. The method consists of: adding an alkali metal catalyst into an initiator, adding epoxypropane dropwise to carry out polymerization reaction, at the end of the reaction using phosphoric acid to perform neutralization, adding water and an adsorbent, and then conducting drying and filtering to obtain the intermediate polyether polyol; and adding a bimetallic catalyst into the intermediate polyether polyol, and adding epoxypropane and ethylene oxide dropwise to carry out polymerization reaction, thus obtaining polyether polyol. The polyether polyol prepared by the method provided by the invention greatly improves the transparency of a pure MDI prepolymer system, and improves the process tolerance level and product performance.

Description

technical field [0001] The invention belongs to the technical field of polyether polyol synthesis, and in particular relates to a preparation method of polyether polyol with low unsaturation, high mutual solubility and high molecular weight. Background technique [0002] In recent years, polyurethane products have developed rapidly due to their excellent comprehensive performance, and gradually formed the status of the sixth largest synthetic material in the world. With the continuous expansion and subdivision of application fields, the research on the performance of polyurethane products has become more and more detailed. Increasingly demanding. [0003] In the synthesis of polyurethane, the use of some high molecular weight polyether polyols can reduce the amount of isocyanate and improve product performance. However, with the increase of molecular weight, the side reactions will also increase accordingly, the degree of unsaturation will increase, the molecular distributi...

Claims

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Application Information

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IPC IPC(8): C08G65/28C08G65/26
CPCC08G65/2609C08G65/2648C08G65/2663
Inventor 周玉波孙兆任杨凯李剑锋王玉
Owner SHANDONG INOV NEW MATERIALS CO LTD
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