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Non-foaming polyurethane water plugging and reinforcing material and preparation method thereof

A reinforcement material, polyurethane technology, applied in polyurea/polyurethane adhesives, adhesive types, adhesive additives, etc., can solve the problems of complex preparation procedures, poor mechanical properties, short storage time, etc., and achieve low viscosity, Good fluidity and extended shelf life

Inactive Publication Date: 2020-09-22
山东金鼎新能源材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art that the polyurethane-water glass composite grouting material is easy to foam, the preparation procedure is complicated, the mechanical properties are poor, the cost is high and the storage time is short, the present invention provides a non-foaming polyurethane water blocking reinforcement material and its preparation method, the material is simple and easy to obtain, has low viscosity, no foaming, excellent mechanical properties and long storage time, and is especially suitable for coal and rock mass gaps with small water flow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] The preparation method of the dispersant in component A: Weigh 36 parts of glycerin, 12 parts of silane coupling agent, and 17 parts of pure water, and stir the three liquids for 20 minutes under the motor of 140 rpm to obtain the dispersant.

[0037] The preparation method of the strengthening agent in component B: Weigh 20 parts of propylene carbonate, 30 parts of phosphoric acid triester, and 10 parts of end-capping agent (BL-175), and stir the three liquids for 18 minutes under the motor of 130 rpm , to get the enhancer.

[0038] The polymethylene polyphenyl isocyanate used in the examples of the present invention has a viscosity of 196 mPa·s and a -NCO content of 30.5-32.0%.

Embodiment 1

[0040] (1) Preparation method of component A: Weigh 90 parts of sodium silicate aqueous solution with a modulus of 2.1 and a Baume degree of 45 degrees, and add 10 parts of dispersant and DMAEE1.2 under stirring with a motor at a speed of 140 rpm After stirring for 35 minutes to take a sample and pass the test, the component A of the polyurethane water blocking reinforcement material is obtained;

[0041] (2) Preparation method of component B: Weigh 90 parts of polymethylene polyphenyl isocyanate and 10 parts of reinforcing agent, stir for 30 minutes under the stirring of a motor with a rotating speed of 80 rpm, and obtain polyurethane after sampling and inspection are qualified. Water plugging reinforcement material B component;

[0042] Take component A and component B according to the volume ratio of A:B=1:1 and use a double-fluid grouting pump to mix and grout.

[0043] The maximum reaction temperature of the polyurethane water blocking reinforcement material prepared in ...

Embodiment 2

[0045] (1) Preparation method of component A: Weigh 88 parts of sodium silicate aqueous solution with a modulus of 2.3 and a Baume degree of 47 degrees, and add 10 parts of dispersant, DMAEE1.2 After stirring for 35 minutes to take a sample and pass the test, the component A of the polyurethane water blocking reinforcement material is obtained;

[0046] (2) Preparation method of component B: Weigh 85 parts of polymethylene polyphenyl isocyanate and 15 parts of reinforcing agent, stir for 30 minutes under the stirring of a motor with a rotating speed of 80 rpm, and obtain polyurethane after sampling and inspection are qualified. Water plugging reinforcement material B component;

[0047] Take component A and component B according to the volume ratio of A:B=1:1 and use a double-fluid grouting pump to mix and grout.

[0048] The maximum reaction temperature of the polyurethane water blocking reinforcement material prepared in Example 2 is 102°C, the gel time (20°C) is 46s, the e...

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Abstract

The invention discloses a non-foaming polyurethane water plugging and reinforcing material and a preparation method thereof. The material is composed of a component A and a component B. The componentA is prepared from 70-90 parts of water glass, 10-30 parts of a dispersing agent and 0.8-2 parts of a catalyst; and the component B comprises the following components in parts by weight: 70-90 parts of polymethylene polyphenyl isocyanate and 10-30 parts of a reinforcing agent. The preparation method comprises the following steps: adding the water glass into a stirring tank, adding the dispersing agent and the catalyst in the stirring process, and stirring for 30-40 minutes to obtain the component A; adding polymethylene polyphenyl isocyanate into the stirring tank, adding the reinforcing agentin the stirring process, and stirring for 20-30 minutes to obtain the component B; and mixing and grouting the component A and the component B according to the volume ratio of 1:1 by adopting a double-liquid grouting pump. The material is used for plugging and reinforcing gaps with small water flow in coal mines, underground engineering and subway tunnels. The material is simple, easy to obtain,low in viscosity, free of foaming, excellent in mechanical property and long in preservation time, and is particularly suitable for coal and rock mass gaps with small water flow.

Description

technical field [0001] The invention belongs to the technical field of polyurethane grouting materials, and in particular relates to a non-foaming polyurethane water blocking reinforcement material and a preparation method thereof. Background technique [0002] Polyurethane grouting materials were developed in Japan in the 1960s, and began to be popularized around the world in the 1980s. At present, they are widely used in various construction, water conservancy, and mining projects. Because there are many types of polyurethane grouting materials, there are many different applications in coal mines. Polyurethane grouting materials react quickly with water and will not be lost due to groundwater erosion. They can react with water and foam to generate secondary pressure to pour foam materials into the gaps. Patent CN 106565927A discloses polyurethane water glass three-dimensional interpenetrating network water blocking and reinforcing grouting material and its preparation met...

Claims

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Application Information

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IPC IPC(8): C09J175/04C09J11/04C09J11/06C09J1/02C09J11/08C08G18/76
CPCC08G18/7664C09J1/02C09J11/04C09J11/06C09J11/08C09J175/04C08K5/521C08K3/34
Inventor 青贵恩徐长随张振国
Owner 山东金鼎新能源材料有限公司
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