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A kind of environment-friendly water-based polyurethane grouting water blocking material and preparation method thereof

A water-based polyurethane and environment-friendly technology, applied in the field of high-performance water-based polyurethane water blocking materials, can solve the problems of safety production threat, unhealthy construction personnel, serious environmental pollution, etc., and achieve good irrigation performance and good secondary water blocking ability , good permeability effect

Active Publication Date: 2015-12-30
HEFEI UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Free TDI and these volatile organic solvents not only cause serious environmental pollution, but also are harmful to the health of construction workers, and pose a serious threat to the safety of underground coal mine production.

Method used

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  • A kind of environment-friendly water-based polyurethane grouting water blocking material and preparation method thereof
  • A kind of environment-friendly water-based polyurethane grouting water blocking material and preparation method thereof
  • A kind of environment-friendly water-based polyurethane grouting water blocking material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Add 90g of highly hydrophilic polyether polyol (functionality: 3, EO / PO=85 / 15, molecular weight: 6500) and 10g of PEG2000 to a closed reaction kettle equipped with a reflux condensing device and a stirring device, at 120°C , The vacuum degree is -0.085MPa, dehydration for 2.5h.

[0035] (2) When the temperature drops to 30°C, add MDI-5035g, pass N 2 protection, stirred evenly, then raised the temperature to 80°C, reacted for 2 hours, added 32g of inert diluent, and stirred evenly to obtain a polyurethane prepolymer solution, namely component A.

[0036] (3) No catalyst and crosslinking agent are added, and only water is used as component B of the water blocking material.

[0037] (4) Mix component A and component B at a volume ratio of 1:1 to obtain the final gel.

[0038] The technical indicators of the products obtained in the above examples are as follows:

[0039] performance

[0040] Gel time (s)

Embodiment 2

[0042] (1) Add 100g of highly hydrophilic polyether polyol (functionality 3, EO / PO=85 / 15, molecular weight 6500) into a closed reaction kettle equipped with a reflux condensing device and a stirring device. Dehydration for 2 hours at -0.085MPa.

[0043] (2) When the temperature drops to 30°C, add TDI6g, pass N 2 Protect, stir evenly, heat up to 60°C, react for 3h, add MDI-5026g, heat up to 75°C, continue to react for 2h, add inert diluent 30g, stir well to obtain polyurethane prepolymer, component A.

[0044] (3) Component B was obtained by dissolving 1.6 g of triethanolamine in 160 g of water.

[0045] (4) Mix component A and component B at a volume ratio of 1:1 to obtain the final gel.

[0046] The technical indicators of the products obtained in the above examples are as follows:

[0047] performance

Embodiment 3

[0049] (1) Add 90g of highly hydrophilic polyether polyol (functionality 3, EO / PO=85 / 15, molecular weight 6500) and 10g of polyether N220 into a closed reaction kettle equipped with a reflux condensing device and a stirring device, Dehydrate for 2 hours at 120°C and a vacuum of -0.085MPa.

[0050] (2) When the temperature drops to 30°C, add MDI-5040g, pass N 2 protection, stir evenly, heat up to 80°C, react for 2 hours, add 35g of inert diluent, stir evenly to obtain polyurethane prepolymer, ie component A.

[0051] (3) Dissolve 1 g of triethanolamine and 0.8 g of triethylenediamine in 180 g of water to obtain component B.

[0052](4) Mix component A and component B at a volume ratio of 1:1 to obtain the final gel.

[0053] The technical indicators of the products obtained in the above examples are as follows:

[0054] performance

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Abstract

The invention discloses an environment-friendly aqueous polyurethane grouting and water plugging material and a preparation method thereof. The environment-friendly aqueous polyurethane grouting and water plugging material is formed by mixing a component A with a component B, wherein the component A is composed of the following raw materials in parts by mass: 100 parts of polyether polyol, 24-34 parts of isocyanate, 20-40 parts of an inert diluting agent and 0-4 parts of a retarder; the component B is composed of the following raw materials in parts by mass: 0-4 parts of a cross-linking agent, 0-0.9 part of a catalyst and 150-180 parts of water. In the use process, the component A and the component B are mixed and grouted in a volume ratio of 1:(0-1). The grouting and water plugging material disclosed by the invention not only has a rapid and efficient seepage-proofing and leaking stoppage performance, but also has the characteristics of high water absorption capability, high permeability, intelligent water plugging, environmental friendliness and the like; the grouting and water plugging material is simple in preparation process, convenient to construct and wide in raw material sources, and is suitable for rapid water plugging and cave-in hole filling of underground engineering including mine roadways, vertical shafts and the like.

Description

1. Technical field [0001] The invention relates to the preparation of a polyurethane material used in the field of waterproofing and grouting, especially an environmentally friendly high-performance water-based polyurethane water blocking material, which is suitable for rapid water blocking and filling and caving of mine roadways, shafts, and other underground projects hole. 2. Background technology [0002] At present, it is used for plugging and waterproofing of mine roadways, shafts, subsea tunnels, subways and other projects, and most of them use grouting water plugging technology. Polyurethane grouting and water blocking material is a new anti-seepage and plugging consolidation material developed after acrylamide and epoxy resin grout. It has high activity, strong anti-seepage and plugging ability, and can be constructed with water. It can meet a variety of different requirements, and is a water blocking material with a wide range of applications and good performance. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/32C08G18/10C08L75/08
CPCC08G18/10C08G18/12C08G18/4812C08G18/4829C08G18/73C08G18/7614C08G18/7671C08G2110/0083C08G18/3281C08G18/3228C08G18/348
Inventor 丁运生朱锦倪建明李雅迪许帮贵张毅孙晓红
Owner HEFEI UNIV OF TECH
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