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All-water-blown high-dispersion silicon dioxide in-situ reinforced polyurethane grouting lifting material and preparation method thereof

A silica, all-water foaming technology, applied in the field of polyurethane grouting lifting material and its preparation, to achieve the effects of good dispersion, good storage stability and high filling.

Inactive Publication Date: 2017-11-03
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to provide a fully water-foamed highly dispersed silica in-situ reinforced polyurethane grouting lifting material and its preparation method. The technical problem to be solved is to select suitable components and proportions to make the polyurethane grouting lifting material In the case of complex construction conditions, it can quickly foam, lift, and solidify, and has high strength to prevent secondary collapse

Method used

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  • All-water-blown high-dispersion silicon dioxide in-situ reinforced polyurethane grouting lifting material and preparation method thereof
  • All-water-blown high-dispersion silicon dioxide in-situ reinforced polyurethane grouting lifting material and preparation method thereof
  • All-water-blown high-dispersion silicon dioxide in-situ reinforced polyurethane grouting lifting material and preparation method thereof

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Effect test

Embodiment 1

[0054] The polyurethane grouting lifting material of the present embodiment is prepared as follows:

[0055] 1. At room temperature, weigh 60 parts of silica sol (pH=6-8, silicon dioxide content 30%, particle size 10-20nm) and 40 parts of dispersant 1, pour them into a reaction kettle, and vacuum remove at 70°C. Water was raised to 110°C for 1 hour to remove water under vacuum for 1 hour to obtain SiO 2 Dispersions.

[0056] 2. Add 100 parts of polyether polyol 2 (functionality 3.2, number average molecular weight 550, viscosity 250-450mPa·s), 1.2 parts of composite catalyst, 3 parts of foam stabilizer and 1.2 parts of deionized water into the reactor, Stir and disperse evenly to obtain component A (viscosity 812mPa·s).

[0057] 3. Weigh 130 parts of polyisocyanate PAPI as component B (viscosity 272 mPa·s).

[0058] 4. Mix component A and component B at a volume ratio of 1:1.3, then foam freely at room temperature, and perform relevant performance tests after standing for thr...

Embodiment 2

[0062] The polyurethane grouting lifting material of the present embodiment is prepared as follows:

[0063] 1. At room temperature, weigh 60 parts of silica sol (pH=6-8, silicon dioxide content 30%, particle size 10-20nm), and 40 parts of dispersant 2, pour them into the reaction kettle, and vacuum remove at 70°C. Water was raised to 110°C for 1 hour to remove water under vacuum for 1 hour to obtain SiO 2 Dispersions.

[0064] 2. Add 100 parts of polyether polyol 2 (functionality 3.2, number average molecular weight 550, viscosity 250-450mPa·s), 0.1 part of composite catalyst, 3 parts of foam stabilizer, 1.2 parts of deionized water into the reactor, Stir and disperse evenly to obtain component A (viscosity 721mPa·s).

[0065] 3. Weigh 130 parts of polyisocyanate PAPI as component B (viscosity 272 mPa·s).

[0066] 4. Mix component A and component B at a volume ratio of 1:1.3, then foam freely at room temperature, and perform relevant performance tests after standing for th...

Embodiment 3

[0070] The polyurethane grouting lifting material of the present embodiment is prepared as follows:

[0071] 1. At room temperature, weigh 60 parts of silica sol (pH=6-8, silicon dioxide content 30%, particle size 10-20nm), 20 parts of dispersant 1, 20 parts of dispersant 2, and pour them into the reaction kettle , vacuum dewatering at 70°C for 1h and then raised to 110°C for 1h to obtain SiO 2 Dispersions.

[0072] 2. Add 100 parts of polyether polyol 2 (functionality 3.2, number average molecular weight 550, viscosity 250-450mPa·s), 0.5 parts of composite catalyst, 3 parts of foam stabilizer, 1.2 parts of deionized water into the reactor, Stir and disperse evenly to obtain component A (viscosity 761mPa·s).

[0073] 3. Weigh 130 parts of polyisocyanate PAPI as component B (viscosity 272 mPa·s).

[0074] 4. Mix component A and component B at a volume ratio of 1:1.3, then foam freely at room temperature, and perform relevant performance tests after standing for three days. ...

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Abstract

The invention discloses an all-water-blown high-dispersion silicon dioxide in-situ reinforced polyurethane grouting lifting material and a preparation method thereof. The all-water-blown high-dispersion silicon dioxide in-situ reinforced polyurethane grouting lifting material comprises a component A and a component B, wherein the component A is prepared from hydrophilic polyether polyol, dispersants, silica sol, composite catalysts, foam stabilizers and water; the component B is polyisocyanate. The polyurethane grouting lifting material is higher in storage stability, is used as a a grouting lifting repairing material with higher compression strength, and is applicable to lifting repairing under different geological conditions; when the polyurethane grouting lifting material is applied to lifting repairing of buildings or road foundation collapse, the requirements of construction operation can be met; the rapid lifting repairing effect can be achieved.

Description

technical field [0001] The invention relates to a polyurethane grouting lifting material with high mechanical strength and excellent comprehensive performance and a preparation method thereof. Background technique [0002] The use of polyurethane grouting and foaming to achieve foundation uplift and repair has been widely used in the fields of construction and transportation, providing a guarantee for the rapid repair and safety of buildings and road surfaces. However, the lifting material formed by ordinary polyurethane foam is prone to problems such as insufficient lifting force and re-collapse of the repair point during the application process. The reason is that the cells of the lifting material formed during the polyurethane water foaming process are not uniform and have low strength. The second is that the foaming space of polyurethane grouting material is limited. With the expansion of its volume during the foaming and lifting process, the lifting material is subject...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/32C08K3/36C08J9/08C08G101/00
CPCC08G18/3206C08G18/3275C08G18/3281C08G18/4829C08G18/6677C08G18/6688C08G18/7664C08K3/36C08K2201/003C08K2201/011C08G2110/0083
Inventor 丁运生何小通汪逸航李嘉晋杨善中孙晓红江晓飞
Owner HEFEI UNIV OF TECH
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