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A single slurry load-bearing reactive material and preparation method thereof

A technology of reactive materials and single slurry, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of non-compliance with the limit of harmful substances in materials, failure of grouting, and high viscosity of finished materials, so as to avoid inaccurate batching and measurement on site. Accurate, simple construction equipment and process, good flame retardant performance

Active Publication Date: 2021-06-22
南方工程检测修复技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Some common water-based or oil-based one-component polyurethane leak-stopping agents on the market can also foam when exposed to water, but there is a serious problem at the same time. The fast flow rate of the agent will collide with water at the grouting outlet, resulting in a mixed effect between the material and water. This mixing effect makes more isocyanate functional groups in the plugging agent react with water under the action of the catalyst. More carbon dioxide foaming agent is released, so that the volume of the material is excessively expanded to form a very low density, the density is less than 25kg / m3. This kind of foam floats on the surface of the water. After solidification, it is very soft and has no strength. The compression resistance is less than 0.5mpa. Bears the weight of the pipes and water in the pipes
[0005] Another problem with some common water-based or oil-based polyurethane one-component plugging agents on the market is that during the production and polymerization of polyurethane one-component plugging agents, polyols will react with isocyanates to form macromolecules, resulting in high viscosity of the finished material. Large, cannot be grouted with most general purpose fluid handling equipment
These organic solvents reduce the solid content of the material, and part of it will be emitted into the environment during the grouting process of the material, and part of it will remain in the material, so that the limit of organic and harmful substances in the material does not meet the requirements of GB18583-2008
[0006] Finally, some common water-based or oil-based polyurethane one-component plugging agents on the market usually do not have flame retardancy, especially if more than 20% of low-boiling organic solvents are added in them, they are easy to burn in case of fire

Method used

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  • A single slurry load-bearing reactive material and preparation method thereof
  • A single slurry load-bearing reactive material and preparation method thereof
  • A single slurry load-bearing reactive material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A single slurry load-bearing reactive material, including the following raw materials in parts by weight, 20-40 parts of chloroalkyl phosphate ester mixture with viscosity ≤ 800 mPa•s (25 ° C), density ≥ 1400 kg / m3, and 20-40 parts of isocyanate 10-30 parts of polyol, 1-5 parts of foam-stabilizing surfactant L6900, 0.01-1 part of catalyst DMDEE, 0.01 part of benzoyl chloride, 0-2 parts of color paste.

[0026] The preparation method of the single slurry load-bearing reaction material includes the following preparation steps, (1) Weighing each raw material by parts by weight;

[0027] (2) Heat the reactor to 48°C-52°C;

[0028] (3) Add the weighed chloroalkyl phosphate mixture, isocyanate, polyol, surfactant, benzoyl chloride, and color paste into the reaction kettle;

[0029] (4) Heat the reactor to 78°C-82°C, and then react for 1.9h-2.2h;

[0030] (5) Then lower the temperature of the reactor to 48°C-52°C, add the weighed catalyst into the reactor, stir for 26min-34m...

Embodiment 2

[0032] A single slurry load-bearing reactive material, including the following raw materials in parts by weight, 20-40 parts of chloroalkyl phosphate ester mixture with viscosity ≤ 800 mPa•s (25 ° C), density ≥ 1400 kg / m3, and 20-40 parts of isocyanate 10-30 parts of polyol, 1-5 parts of silicone Si-C surfactant, 0.01-1 part of catalyst DMDEE, 0.01 part of benzoyl chloride, 0-2 parts of color paste.

[0033] Silicone Si-C type surfactant is an organic additive that can stabilize the foam in the material and make the cell structure uniform and fine without breaking the foam.

[0034] The preparation method of the single slurry load-bearing reaction material includes the following preparation steps, (1) Weighing each raw material by parts by weight;

[0035] (2) Heat the reactor to 48°C-52°C;

[0036] (3) Add the weighed chloroalkyl phosphate mixture, isocyanate, polyol, surfactant, benzoyl chloride, and color paste into the reaction kettle;

[0037] (4) Heat the reactor to 78...

Embodiment 3

[0040] A single slurry load-bearing reaction material, comprising the following raw materials in parts by weight in the following table, Table 1,

[0041]

[0042] The preparation method of the single slurry load-bearing reaction material includes the following preparation steps, (1) Weighing each raw material by parts by weight;

[0043] (2) Heat the reactor to 48°C;

[0044] (3) Add the weighed chloroalkyl phosphate mixture, isocyanate, polyol, surfactant, benzoyl chloride, and color paste into the reaction kettle;

[0045] (4) Heat the reactor to 78°C, then react for 1.9h;

[0046] (5) Then lower the temperature of the reactor to 48°C, add the weighed catalyst into the reactor, and stir for 26 minutes to obtain the product.

[0047] The color of the prepared material is uniform gray, and the various physical properties of the grouting in the water environment are as follows in Table 2:

[0048]

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Abstract

The invention provides a single-slurry load-bearing reaction material and a preparation method thereof. The prepared single-slurry load-bearing reaction material is flame-retardant, has low viscosity, is suitable for most general-purpose fluid conveying equipment, can bear load, and is convenient for repairing seepage of underground pipelines in a water environment. Leakage, especially convenient for non-excavation repair of underground pipeline leakage in water environment. A single slurry load-bearing reactive material, including the following raw materials in parts by weight, 20-40 parts of chloroalkyl phosphate ester mixture with viscosity ≤ 800 mPa•s (25 ° C), density ≥ 1400 kg / m3, and 20-40 parts of isocyanate 10-30 parts of polyol, 1-5 parts of foam-stabilizing surfactant, 0.01-1 part of catalyst DMDEE, 0.01 part of benzoyl chloride, 0-2 parts of color paste.

Description

technical field [0001] The invention relates to underground pipeline leakage, in particular to a single slurry load-bearing reactive material for repairing underground pipeline leakage and a preparation method thereof. Background technique [0002] Leakage is a common problem in underground pipelines in my country. Concrete pipeline corrosion and PCCP pipeline broken wire cracking are one of the main reasons for the leakage of these two types of pipelines. The urban ground environment is complex, and the conditions for pipeline excavation and maintenance are often not available. Most of the current non-excavation repairs in foreign countries belong to the overall replacement of pipelines, which is expensive and has high requirements for the pipeline construction environment. This project has developed an environmentally friendly and corrosion-resistant single-slurry load-bearing reactive material for underground pipelines. Not only is the single-slurry construction used, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G18/42C08K5/521C09K3/12
Inventor 王复明方宏远王磊赵鹏潘艳辉
Owner 南方工程检测修复技术研究院