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Inorganic modified polyurethane grouting material and preparation method thereof

A grouting material and inorganic modification technology, applied in the chemical industry, can solve problems such as low compressive strength and bonding strength, poor permeability and toughness, and affect the reinforcement effect, so as to achieve guaranteed strength, excellent flame retardancy, and meet The effect of safety and environmental protection requirements

Active Publication Date: 2013-09-18
SHANDONG ANLENG NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water glass cement two-liquid grouting is the most widely used inorganic material. The material has the advantages of low cost, basically no exothermic reaction, but slow curing speed, low compressive strength and bonding strength, poor permeability and toughness
The most widely used organic grouting material is polyurethane grouting material, which has adjustable curing speed, good compressive strength and bonding strength, good permeability and toughness, and the reinforcement effect is much better than that of inorganic materials, but the product cost is high, and The heat of reaction is large, the flame retardancy is not good, and it is easy to lead to the occurrence of secondary disasters, and the material has a large rate of foaming in a water environment, and the strength of the material is significantly reduced, which greatly affects the reinforcement effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Prepare 50kg of component A: 95.5 parts of sodium silicate aqueous solution (Baume degree 48-51, modulus 2.5-2.8), 1 part of catalyst bis(dimethylaminoethyl)ether, chain extender diethylene diethylene glycol Put 3.5 parts of alcohol into a 100L small-scale mixing kettle, stir evenly under normal temperature and pressure, and then pack it into a barrel and seal it for later use.

[0060] Prepare 50 kg of component B: add 65 parts of modified MDI-PU2101, 10 parts of modified MDI-PU2102, 10 parts of viscosity reducer DBE, and 15 parts of plasticizer triacetin. Put it into a 100L small mixing kettle, stir evenly under normal temperature and pressure, then put it in a barrel and seal it for later use.

[0061] Take samples of component A and component B at a volume ratio of 1:1 or a mass ratio of 1.25:1, calculate the required mass of each component according to the total mass required for the test, and pour the fully mixed materials into the Curing at room temperature in a...

Embodiment 2

[0071] Prepare 50kg of component A: 95 parts of sodium silicate aqueous solution (baume degree 48-51, modulus 2.5-2.8), 2 parts of catalyst bis(dimethylaminoethyl) ether, chain extender 3 parts of alcohol are put into a 100L small mixing kettle, stirred evenly under normal temperature and pressure, and then packed into barrels and sealed for later use.

[0072] Prepare 50 kg of component B: add 55 parts of modified MDI-PU2101, 20 parts of modified MDI-PU2102, 15 parts of viscosity reducer DBE, and 10 parts of plasticizer triacetin. Put it into a 100L small mixing kettle, stir evenly under normal temperature and pressure, then put it in a barrel and seal it for later use.

[0073] Take samples of component A and component B at a volume ratio of 1:1 or a mass ratio of 1.25:1, calculate the required mass of each component according to the total mass required for the test, and pour the fully mixed materials into the Curing at room temperature in a standard mold, and testing the m...

Embodiment 3

[0083] Prepare 50kg of component A: 94.5 parts of sodium silicate aqueous solution (Baume degree 48-51, modulus 2.5-2.8), 2 parts of catalyst bis(dimethylaminoethyl)ether, chain extender diethylene diethylene glycol Put 3.5 parts of alcohol into a 100L small-scale mixing kettle, stir evenly under normal temperature and pressure, and then pack it into a barrel and seal it for later use.

[0084] Prepare 50 kg of component B: add 20 parts of modified MDI-PU2101, 55 parts of modified MDI-PU2102, 18 parts of viscosity reducer DBE, and 7 parts of plasticizer triacetin. Put it into a 100L small mixing kettle, stir evenly under normal temperature and pressure, then put it in a barrel and seal it for later use.

[0085] Take samples of component A and component B at a volume ratio of 1:1 or a mass ratio of 1.25:1, calculate the required mass of each component according to the total mass required for the test, and pour the fully mixed materials into the Curing at room temperature in a...

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Abstract

The invention discloses an inorganic modified polyurethane grouting material. The inorganic modified polyurethane grouting material comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: 85-98 parts of sodium silicate solution, 0.5-3 parts of catalyst, 1-5 parts of chain extender and 0-8 parts of water; and the component B comprises the following components in parts by weight: 10-80 parts of modified polymeric MDI-PU2101, 10-75 parts of modified polymeric MDI-PU2102, 5-20 parts of viscosity reducing agent and 5-15 parts of plasticizer. A preparation method of the material disclosed by the invention is simple, and the material is injected into a coal-rock mass through a dual-liquid grouting pump and can achieve the function of reinforcing the coal-rock mass after fast curing; compared with the conventional polyurethane grouting material, the material has the advantages of lower highest reaction temperature, excellent flame resistance, lower cost, capability of keeping the mechanical properties at a higher level, capability of still keeping the higher strength in a water environment and the like; and the material does not contain toxic, volatile and corrosive substances and can meet underground safety and environmental protection requirements of the material.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to an inorganic modified polyurethane grouting material and a preparation method thereof. Background technique [0002] During the excavation process of coal mine roadway, broken or loose coal rock mass often leads to coal mine accidents such as roof fall and chipping, which not only seriously endangers the life safety of absenteeism, but also seriously affects the production efficiency of coal mining enterprises. Therefore, in the production process of coal mines, the broken coal rock mass is generally reinforced by grouting. There are many types of grouting materials, including inorganic grouting materials and organic grouting materials. Inorganic materials are widely used in water glass cement two-liquid grouting. The material has the advantages of low cost, basically no exothermic reaction, but slow curing speed, low compressive strength and bonding streng...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08K3/34C08G18/76C08G18/66C08G18/48
Inventor 黄屹峰刘天亮周辰辰程顺利单光菊
Owner SHANDONG ANLENG NEW MATERIAL TECH CO LTD
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