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Water-resistant dispersible polyurethane rigid foam grouting water-stop reinforcement material and preparation method thereof

A rigid foam, water-resistant dispersion technology, used in shaft equipment, mining equipment, earth-moving drilling, etc., can solve the problems of water source and surrounding ecological environment pollution, threat to long-term stability of the project, difficult to block water inrush or jet flow, etc. It can achieve the effect of adjustable curing time, ensuring grouting operation time, construction safety, and good water resistance and dispersion.

Active Publication Date: 2022-04-12
CCCC SHANGHAI THIRD HARBOR SCI RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Polyurethane grouting materials can be divided into water-reactive and non-water-reactive. Water-reactive polyurethane grout swells and solidifies when it encounters water. It is suitable for conventional plugging treatment, but it is easy to be washed away by water, and it is difficult to block water gushing or jet flow. The process requires water to participate in the reaction and the characteristics of the consolidated body are easy to hydrolyze, resulting in poor strength and durability, which poses a potential threat to the long-term stability of the project; non-water reactive polyurethane slurry has good hydrophobicity and hydrolysis resistance stability, and stable performance , not affected by the water content of the grouting environment, suitable for blocking water gushing or jet flow, but still has the problem of poor water dispersion resistance, which is easy to cause pollution to water sources and the surrounding ecological environment

Method used

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  • Water-resistant dispersible polyurethane rigid foam grouting water-stop reinforcement material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In this embodiment, the water-resistant dispersion type polyurethane rigid foam grouting water-stop reinforcement material is prepared according to the following method:

[0042] Weigh 7g of propylene carbonate, add 7g of polyvinyl acetate into it and let it stand for 48 hours to obtain a polyvinyl acetate solution. Heat the prepared polyvinyl acetate solution to 60°C and pour it into 230g of preheated Into polymethylene polyphenyl polyisocyanate PM200 at 40°C, and stirred at a speed of 1800r / min for 120s to obtain component A;

[0043] Weigh 46g polyether polyol 4110P, add 9g polyether polyol HKOL-403A, 45g polyester polyol P455N, 20g dioctyl sebacate, 27g dipropylene glycol, 2g foam stabilizer BL-8468, 1.5g Catalyst A33: Stir at a speed of 1200r / min for 60s, then add 10g of fluorodichloroethane to it, and continue stirring at a speed of 1200r / min for 60s to obtain component B;

[0044] Pour the prepared component A into component B, and stir at a speed of 1800r / min f...

Embodiment 2

[0047] In this embodiment, the water-resistant dispersion type polyurethane rigid foam grouting water-stop reinforcement material is prepared according to the following method:

[0048] Weigh 4g of propylene carbonate, add 4g of ethylene carbonate and 8g of polyvinyl acetate, heat to 90°C and stir with a glass rod until translucent homogeneous viscous liquid, pour into 230g while stirring and preheat to 40°C In the polymethylene polyphenyl polyisocyanate PM200, stirred at a speed of 1800r / min for 120s to obtain A component;

[0049] Weigh 80g polyether polyol HK-1302, add 20g polyether polyol 4110G, 25g dioctyl sebacate, 10g glycerol, 2g foam stabilizer BL-8468, 1g catalyst A33; at 1200r / min Stir at a rotating speed of 1200r / min for 60s, then add 10g of fluorodichloroethane to it, and continue to stir at a rotating speed of 1200r / min for 60s to obtain component B;

[0050] Pour the prepared component A into component B, and stir at a speed of 1800r / min for 20s to obtain a wat...

Embodiment 3

[0053] In this embodiment, the water-resistant dispersion type polyurethane rigid foam grouting water-stop reinforcement material is prepared according to the following method:

[0054] Weigh 5g of propylene carbonate, add 7g of polyvinyl acetate into it, heat to 70°C and stir with a glass rod until translucent homogeneous viscous liquid, pour into 220g of polymethylene carbonate preheated to 40°C while stirring In polyphenyl polyisocyanate PM200, stir at a speed of 1800r / min for 120s to obtain component A;

[0055] Weigh 60g polyester polyol P455N, add 40g polyether polyol 4110G, 20g dioctyl terephthalate, 21.5g neopentyl glycol, 2g foam stabilizer BL-8468, 1g catalyst A33; Stir at a speed of 1200r / min for 60s, then add 10g of fluorodichloroethane to it, and continue to stir at a speed of 1200r / min for 60s to obtain component B;

[0056] Pour the prepared component A into component B, and stir at a speed of 1800r / min for 20s to obtain a water-resistant dispersion type polyur...

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Abstract

The application discloses a water-resistant dispersible polyurethane rigid foam grouting and water-stop reinforcement material and a preparation method thereof. The material includes A component and B component, and the A component includes: isocyanate: 210-230 parts by weight, poly 7-14 parts by weight of vinyl acetate, solvent: 4-10 parts by weight, foaming agent: 0-10 parts by weight, the B component includes: polymer polyol: 100 parts by weight, plasticizer : 20-25 parts by weight, chain extender: 10-27 parts by weight, foaming agent: 0-10 parts by weight, foam stabilizer: 1-2 parts by weight, catalyst: 1-1.5 parts by weight. The preparation method comprises: mixing the component A and the component B in proportion and stirring evenly to obtain. This application has good water dispersion resistance, is not easy to be washed away by water in the flowing water body, and has high strength, the compressive strength of pure foam is not less than 2MPa, good durability, adjustable curing time, low price, suitable for plugging Water gushing and jet flow have good economy, safety and environmental protection.

Description

technical field [0001] The application belongs to the technical field of composite materials, and in particular relates to a water-resistant dispersion type polyurethane rigid foam grouting water-stop reinforcement material and a preparation method. Background technique [0002] Water inrush is often encountered in tunnel and mining projects, which can easily cause disasters such as surrounding rock instability and side slope landslides, which not only cause casualties, property losses, and delays in construction schedules, but also affect the long-term stability of engineering structures and deteriorate construction conditions. and damage the surrounding ecological environment. Grouting and water-stop reinforcement technology is one of the most commonly used and effective means to improve the mechanical properties and stability of loose or water-bearing strata, as well as to prevent and control landslides, seepage, water gushing, mud inrush and quicksand. [0003] At prese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08L75/08C08L75/06C08L31/04C08J9/14C08G18/66C08G18/48C08G18/42E21D11/38C08G101/00
CPCC08J9/144C08G18/4018C08G18/48C08G18/42C08G18/6674C08G18/6677E21D11/38C08J2203/142C08J2375/04C08J2375/08C08J2375/06C08J2431/04
Inventor 方子善王成启聂亚楠梁远博张晓乐郭玉林
Owner CCCC SHANGHAI THIRD HARBOR SCI RES INST CO LTD
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