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Polyether polyol used for polyurethane single-component grouting materials and preparation method and application thereof

A technology of polyether polyol and grouting material, which is applied in the field of polyether polyol for polyurethane and its production method, and can solve problems such as high energy consumption, high melting point, and difficult reaction

Inactive Publication Date: 2016-02-17
JIANGSU ZHONGSHAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high melting point of pentaerythritol, it is difficult to react with EO / PO. From the perspective of operability, low molecular liquid alcohol must be added to pentaerythritol as a composite initiator.
Moreover, the epoxy ring-opening temperature of this method needs to be 120-150°C, and the energy consumption is high. Therefore, it is necessary to develop a polyether polyol with relatively low energy consumption and higher water retention.

Method used

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  • Polyether polyol used for polyurethane single-component grouting materials and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 15.4g of glycerin, 11.6g of sorbitol, and 4.5g of KOH into the polymerization reactor. After nitrogen replacement for 3 times, start vacuuming to -0.98MPa, then raise the temperature to 120°C and start dehydration for 2 hours. When the water content is less than 0.1%, the temperature is lowered to 105°C and the PO / EO (PO357g, EO2616g) mixture is continuously introduced until the pressure is ≤0.15MPa. After passing through, keep warm and age to negative pressure, cool down and discharge to obtain crude ether, and then press the crude ether with nitrogen to the refining tank for post-treatment. Add 150g of water into the refining kettle, heat up to 80°C and stir for 1 hour, then add 8.64g of phosphoric acid for neutralization and stir for 1 hour, then add 12g of refined preparation and stir for 1 hour, and finally heat up to 120°C and vacuum dehydrate until the water mass fraction is ≤0.08 %, the central control pH is 5.0-7.0, and the refined agent is removed by press...

Embodiment 2

[0029] Add 9.74g of glycerin, 19.26g of sorbitol, and 4.5g of KOH into the polymerization reactor. After nitrogen replacement for 3 times, start vacuuming to -0.98MPa, then raise the temperature to 115°C and start dehydration for 2 hours. When the water content is less than 0.1%, the temperature is lowered to 105°C and the PO / EO (PO59g, EO2912g) mixture is continuously introduced. After passing through, keep warm and age to negative pressure, cool down and discharge to obtain crude ether, and then press the crude ether with nitrogen to the refining tank for post-treatment. Add 150g of water into the refining kettle, heat up to 80°C and stir for 1 hour, then add 8.64g of phosphoric acid for neutralization and stir for 1 hour, then add 12g of refined preparation and stir for 1 hour, and finally heat up to 120°C and vacuum dehydrate until the water mass fraction is ≤0.08 %, the central control pH is 5.0-7.0, and the refined agent is removed by pressure filtration to obtain the fi...

Embodiment 3

[0033] Add 12.5g of glycerin, 15.5g of sucrose, and 9g of KOH into the polymerization reactor. After 3 times of nitrogen replacement, start to pull the vacuum to -0.98MPa, then raise the temperature to 125°C and start dehydration for 2 hours. When the water content is less than 0.1%, the temperature is lowered to 115°C and the PO / EO (PO238g, EO2734g) mixture is continuously introduced. After passing through, keep warm and age to negative pressure, cool down and discharge to obtain crude ether, and then press the crude ether with nitrogen to the refining tank for post-treatment. Add 150g of water into the refining kettle, heat up to 80°C and stir for 1 hour, then add 17.28g of phosphoric acid for neutralization and stir for 1 hour, then add 12g of refined preparation and stir for 1 hour, and finally heat up to 120°C and vacuum dehydrate until the water mass fraction is ≤0.08 %, the central control pH is 5.0-7.0, and the refined agent is removed by pressure filtration to obtain ...

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Abstract

The invention relates to polyether polyol used for polyurethane single-component grouting materials and a preparation method and application thereof. The method mainly overcomes the defects that the water covering amount of polyether for original polyether grouting is small, and the strength of solidified bodies formed through reaction between polyether and water is low. The method includes the following steps that initiating agents and solid catalysts are input and mixed and are heated and dewatered after being evenly stirred, EO / PO is introduced, and aging is performed after material introduction ends; cooling is performed, water and neutralizers of phosphoric acid are added, neutralizing and stirring are performed, aluminum silicate adsorbents are added, low boiling matter and water in crude ether are removed through temperature raising vacuumizing, and finished products are obtained through press filtration after water content is analyzed to be qualified by central control analysis.

Description

technical field [0001] The invention relates to polyether polyol for polyurethane and its preparation method, which is used for preparing polyurethane grouting material, especially one-component polyurethane grouting material. Background technique [0002] Polyurethane grouting material, referred to as cyanide, is a chemical slurry composed of a prepolymer prepared by the reaction of polyisocyanate and polyhydroxy compound, and some other additives such as catalyst, foam stabilizer, foaming agent, and retarder. Since the slurry contains unreacted end-NCO groups, when the slurry is injected into porous buildings or loose formations, once the -NCO groups contact with water, chemical reactions such as chain extension, branching, and cross-linking will occur. In the gaps of buildings or the pores of foundation soil particles, a water-insoluble gel-like consolidated body is formed, and the consolidated body contains a large number of polar groups, which have a strong affinity and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G65/30C08G18/48
CPCC08G65/2609C08G18/4837C08G65/30
Inventor 宗红亮申宝兵俞中锋
Owner JIANGSU ZHONGSHAN CHEM
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