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Preparation method of polyether polyol used for water-soluble polyurethane grouting materials

A water-soluble polyurethane and polyether polyol technology, applied in the field of polyether polyol synthesis, can solve the problems of low bonding strength and low water inclusion rate, achieve high water inclusion rate and strength, improve activity, and fast water solidification effect of speed

Active Publication Date: 2016-02-10
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After such polyether polyol is synthesized into water-soluble polyurethane grouting material, the water inclusion rate is low and the bonding strength is low when used.

Method used

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  • Preparation method of polyether polyol used for water-soluble polyurethane grouting materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Add 18.2g of solid sorbitol, 4.5g of potassium hydroxide, 7g of dimethyl sulfoxide, and 7g of tetrahydrofuran into a 1L high-pressure reactor at room temperature, vacuumize to make the vacuum degree ≤ -0.09MPa and replace with nitrogen 4 times, start Stir and raise the temperature to 115°C. Under vacuum ≤ -0.09MPa, dehydrate for 2 hours, remove the solvent at the same time, and then continuously drop 212g of epoxide. In this epoxide, there are 106g of propylene oxide, ethylene oxide Alkanes 106g. The reaction temperature is 113° C. under the control pressure of ≤0.35 MPa in the reaction kettle, and the aging reaction is continued for 1 hour after the feeding is completed. Under the condition of vacuum degree≤-0.09MPa, the unreacted epoxy monomer was removed to obtain 233g of intermediate polyether polyol.

[0028] (2) Take the intermediate polyether polyol and put it into a 2.5L reactor, then raise the reaction temperature to 113°C, pump a vacuum, and continuously ...

Embodiment 2

[0030] (1) Add 18.2g of solid sorbitol, 4.75g of potassium hydroxide, 8g of carbon tetrachloride, and 7g of tetrahydrofuran into a 1L high-pressure reactor at room temperature, vacuumize to make the vacuum degree ≤ -0.09MPa and replace with nitrogen 4 times, start stirring And raise the temperature to 115°C, under the vacuum degree ≤ -0.09MPa, dehydration reaction for 2 hours, remove the solvent at the same time, and then continuously drop 202g of epoxide, 140g of propylene oxide in this epoxide, ethylene oxide 62g. The reaction temperature is 113° C. under the control pressure of ≤0.35 MPa in the reaction kettle, and the aging reaction is continued for 1 hour after the feeding is completed. Under the condition of vacuum degree≤-0.09MPa, the unreacted epoxy monomer was removed to obtain 223.2g of intermediate polyether polyol.

[0031] (2) Take the intermediate polyether polyol and put it into a 2.5L reactor, then raise the reaction temperature to 113°C, pump a vacuum, and co...

Embodiment 3

[0033] (1) Add 18.2g of solid sorbitol, 6.6g of potassium hydroxide, and 22g of tetrahydrofuran into a 1L autoclave at room temperature, evacuate to make the vacuum degree ≤ -0.09MPa and replace with nitrogen 4 times, start stirring and raise the temperature to 115 ℃, under vacuum ≤ -0.09MPa, dehydration reaction for 2 hours, remove the solvent at the same time, then continuously drop 182g of epoxide, the epoxide is all propylene oxide. The reaction temperature is 113° C. under the control pressure of ≤0.35 MPa in the reaction kettle, and the aging reaction is continued for 1 hour after the feeding is completed. Under the condition of vacuum degree≤-0.09MPa, the unreacted epoxy monomer was removed to obtain 204.5g of intermediate polyether polyol.

[0034](2) Take the intermediate polyether polyol and put it into a 2.5L reactor, then raise the reaction temperature to 113°C, pump a vacuum, and continuously drop 2000g of ring polyol into the intermediate polyether polyol at a va...

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Abstract

The invention belongs to the technical field of polyether polyol synthesis and particularly relates to a preparation method of polyether polyol used for water-soluble polyurethane grouting materials. A front-segment polymerization reaction includes the steps that firstly, neosorb, an alkali metal catalyst and solvent are added into a reaction kettle, and a midbody polyether polyol is obtained; a rear-segment polymerization reaction includes the steps that the midbody polyether polyol is taken and placed into a reaction kettle, epoxide is dropwise added to the midbody polyether polyol continuously, and the polyether polyol is obtained. The degree of functionality of the obtained polyether is 6, and the molecular weight is 15000-22000. After the polyether which is high in degree of functionality, super high in molecular weight and low in degree of unsaturation is made into the water-soluble polyurethane grouting materials, higher water efficiency and strength are achieved. In an overall polymerization reaction, the ethylene oxide accounts for 50-90% of total epoxide, the activity of the polyether can be improved, and a higher solid water speed is achieved in the obtained water-soluble polyurethane grouting materials.

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 for water-soluble polyurethane grouting materials. Background technique [0002] Water-soluble polyurethane grouting material is a new type of polymer chemical grouting material developed in the 1970s. Mainly used in water pools, water towers, basement leak plugging and waterproof anti-corrosion coatings, wall plugging in geological drilling, selective water plugging in oil extraction and water gushing water plugging in mines, etc. [0003] Water-soluble polyurethane grouting material is a kind of polymer grouting material with isocyanate group at the end, which is made of hydrophilic polyether polyol and isocyanate as the main raw materials. The material immediately reacts with water to form a water-insoluble elastic colloidal solid, which has a good water-stopping effect. Therefore, the structure and qual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G18/48
Inventor 王玉孙兆任周玉波刘军
Owner SHANDONG INOV NEW MATERIALS CO LTD
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