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Preparation method for high activity high molecular weight low unsaturated polyether polyol

A polyether polyol and high molecular weight technology is applied in the field of preparation of high-activity, high-molecular-weight and low-unsaturation polyether polyols, and can solve the problems of performance, unsaturation and stability effects, and complicated catalyst removal technology. , to reduce the content of volatile organic compounds, reduce product odor and improve reactivity

Inactive Publication Date: 2019-03-19
SHANDONG BLUSR DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The DMC catalyst includes metal components. If DMC remains in the polyether polyol, its product performance, unsaturation and stability will be significantly affected, and the removal technology of this type of catalyst is extremely complicated.

Method used

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  • Preparation method for high activity high molecular weight low unsaturated polyether polyol
  • Preparation method for high activity high molecular weight low unsaturated polyether polyol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of polyether polyol oligomers

[0030] at 15m 3 Add 576kg glyceryl ether (400 molecular weight), 28.8kg propylene glycol and 4kg tetrakis (tetramethylguanidinium) phosphazene chloride in the stainless steel reaction kettle, carry out nitrogen replacement, measure the oxygen content in the reaction kettle to be lower than 80ppm. The temperature was raised to 100°C, and dehydration was carried out by nitrogen bubbling under reduced pressure. Keep the temperature in the kettle at 102±2°C and the pressure at -0.1~0.3MPa, continuously add 7461kg of propylene oxide, react under internal pressure for 60 minutes, the reaction temperature is 102±2°C, and then remove the monomer for 30 minutes to obtain Polyether polyol oligomer with high catalytic activity.

[0031] (2) Preparation of high activity and high molecular weight polyether polyol crude polymer

[0032] Use the above-mentioned polyether polyol oligomer with high catalytic activity as the basic polyet...

Embodiment 2

[0037] (1) Preparation of polyether polyol oligomers

[0038] at 15m 3 Add 752kg glycerol ether (600 molecular weight), 15kg glycerol and 66kg tetrakis (tetramethylguanidinium) phosphazene hydroxide in the stainless steel reaction kettle, carry out nitrogen replacement, measure the oxygen content in the reaction kettle to be lower than 80ppm. The temperature was raised to 100°C, and dehydration was carried out by nitrogen bubbling under reduced pressure. Keep the temperature in the kettle at 138±2°C, the pressure at -0.1~0.3MPa, continuously add 5828kg of propylene oxide, react under internal pressure for 60 minutes, the reaction temperature is 138±2°C, and then remove the monomer for 30 minutes to obtain Polyether polyol oligomer with high catalytic activity.

[0039] (2) Preparation of high activity and high molecular weight polyether polyol crude polymer

[0040] Use the above-mentioned polyether polyol oligomer with high catalytic activity as the basic polyether, keep t...

Embodiment 3

[0045] (1) Preparation of polyether polyol oligomers

[0046] at 15m 3 Add 479kg glycerol ether (550 molecular weight), 4.79kg sorbitol and 28kg tetrakis (tetramethylguanidinium) phosphazene bicarbonate in the stainless steel reaction kettle, carry out nitrogen replacement, measure the oxygen content in the reaction kettle to be lower than 80ppm. The temperature was raised to 100°C, and dehydration was carried out by nitrogen bubbling under reduced pressure. Keep the temperature in the kettle at 110±2°C, the pressure at -0.1~0.3MPa, continuously add 4249kg of propylene oxide, react under internal pressure for 60 minutes, the reaction temperature is 110±2°C, and then remove the monomer for 30 minutes to obtain Polyether polyol oligomer with high catalytic activity.

[0047] (2) Preparation of high activity and high molecular weight polyether polyol crude polymer

[0048] Use the above-mentioned polyether polyol oligomer with high catalytic activity as the basic polyether, ke...

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Abstract

The invention relates to a preparation method of polyether polyol, in particular to a preparation method for high activity high molecular weight low unsaturated polyether polyol. The preparation method comprises the following steps: (1) carrying out a polymerization reaction with epoxypropane by taking a mixture composed of a glyceryl ether compound and a small molecular compound as an initiator and a phosphonitrile compound as a catalyst to synthesize a polyether polyol oligomer; (2) adding the mixture of epoxypropane and ethylene oxide at a pressure of -0.1-0.3 MPa and at a temperature of 90-130 DEG C for a polymerization reaction and an inner pressure reaction by taking the polyether polyol oligomer as a basic polyether, and then adding ethylene oxide further to carry out a blocked polymerization reaction and the inner pressure reaction to prepare a polyether polyol coarse polymer; and (3) carrying out refining to obtain the polyether polyol. The polyether polyol prepared by the invention has the characteristics of being high in activity, small in content of volatile organic compounds, small in smell and high in compressing strength.

Description

technical field [0001] The invention relates to a preparation method of polyether polyol, in particular to a preparation method of polyether polyol with high activity, high molecular weight and low degree of unsaturation. Background technique [0002] The usual method for preparing polyether polyols is to use small molecule polyols as the initiator, and carry out anionic ring-opening polymerization with propylene oxide (PO) under the action of a catalyst. At present, the most common anion ring-opening catalyst used in the industrial field is potassium hydroxide, because it does not require too severe reaction conditions (pressure 0.2-0.5MPa, temperature 100-130°C), and the cost of the catalyst is small and the reaction The process is easy to control. However, when potassium hydroxide is used as a catalyst, chain transfer reactions are likely to occur during the polymerization process, which leads to a series of defects in its products, such as high degree of unsaturation, w...

Claims

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Application Information

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IPC IPC(8): C08G65/28C08G18/48C08G101/00
CPCC08G18/4837C08G65/2609C08G65/2645C08G65/2675C08G2101/00
Inventor 张涛郭辉徐韦段艳芳贾世谦
Owner SHANDONG BLUSR DONGDA CHEM
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