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A kind of epoxy modified polyurethane - water glass composite grouting material

A technology of epoxy modification and composite grouting, which is applied in the field of composite material synthesis, can solve the problem of lack of flexible reaction chain segments, product gel time, toughness and shear strength that are difficult to meet the requirements of coal and rock mass reinforcement and plugging construction, Lack of catalyst components to adjust the curing reaction speed, etc., to achieve the effects of controlling the curing reaction speed, improving structure and performance, and good compressive strength

Active Publication Date: 2018-03-02
SHANXI YUBANG NEW POWER SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its A component is a mixture of polyphenyl polymethylene polyisocyanate and modified MDI, and the NCO content is above 29%. However, due to the lack of flexible reaction chain segments in the material curing system and the lack of catalyst components to adjust the curing reaction speed, the physical properties such as gel time, toughness and shear strength of the final product are difficult to meet the actual conditions of coal and rock mass reinforcement and plugging. Construction requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of polyisocyanate prepolymer

[0038] Add 7.0 kg of castor oil polyol (moisture content less than 0.08%) and 78.0 kg of polyphenyl polymethylene polyisocyanate into the reaction kettle, and react at a constant temperature of 80 ° C for 4 hours under stirring conditions, stop the reaction and cool to 40 ° C, Sampling detection NCO content is 26.5%, obtains the polyisocyanate prepolymer that is brown fade.

[0039] (2) Preparation of component B

[0040] At room temperature, add 85.0 kg of polyisocyanate prepolymer and 15.0 kg of polyethylene glycol glycidyl ether into the reaction kettle, stir and mix evenly to obtain the qualified product of component B.

[0041] (3) Preparation of compound additives

[0042] The solubilizer (5Kg of glycerin, 0.3Kg of castor oil polyoxyethylene (90) ether) was added to 2.0kg of 50% aqueous solution of potassium oleate and 0.3 kg of bis(dimethylaminoethyl) ether, mixed, and stirred evenly to obtain a compound additive. ...

Embodiment 2

[0052] (1) Preparation of polyisocyanate prepolymer

[0053] Add 9.0 kg of castor oil polyol (moisture content less than 0.08%) and 71.0 kg of polyphenyl polymethylene polyisocyanate into the reactor, and react at a constant temperature of 80°C for 4 hours under stirring conditions, stop the reaction and cool to 40°C, Sampling detection NCO content is 25.0%, obtains the polyisocyanate prepolymer that is brown fade.

[0054] (2) Preparation of component B

[0055] At room temperature, add 80.0 kg of polyisocyanate prepolymer and 20.0 kg of polypropylene glycol diglycidyl ether into the reaction kettle, stir and mix evenly to obtain the qualified product of component B.

[0056] (3) Preparation of compound additives

[0057] Add the solubilizer (3Kg of glycerin, 0.2Kg of Pingpingjia C-125) to 1.4 kg of 50% aqueous solution of potassium oleate and 0.4 kg of bis(dimethylaminoethyl) ether, mix, and stir evenly to obtain a compound additive.

[0058] (4) Preparation of component ...

Embodiment 3

[0067] (1) Preparation of polyisocyanate prepolymer

[0068] Add 10.0 kg of castor oil polyol (moisture content less than 0.08%) and 80.0 kg of polyphenyl polymethylene polyisocyanate into the reaction kettle, and react at a constant temperature of 80°C for 4 hours under stirring conditions, stop the reaction and cool to 40°C, Sampling detection NCO content is 28.5%, obtains the polyisocyanate prepolymer that is brown fade.

[0069] (2) Preparation of component B

[0070] At room temperature, add 90.0 kg of polyisocyanate prepolymer and 20.0 kg of polypropylene glycol diglycidyl ether into the reaction kettle, stir and mix evenly to obtain the qualified product of component B.

[0071] (3) Preparation of compound additives

[0072] The solubilizer (3.5Kg of glycerin, 0.5Kg of polyoxyethylene stearate SG-50) was added to 2.0 kg of 50% potassium oleate aqueous solution and 0.5 kg of bis(dimethylaminoethyl) ether, and mixed, and the mixture was evenly stirred to obtain a compou...

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PUM

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Abstract

The invention relates to an epoxy-modified polyurethane-water glass composite grouting material, and a preparation method and application thereof. The epoxy-modified polyurethane-water glass composite grouting material is composed of two independent components, i.e., a component A and a component B, in a volume ratio of 1: 1, wherein the component A comprises water glass, a solubilizer and a catalyst, and the component B comprises polyisocyanate performed polymer and an epoxy active flexibilizer. Through introduction of the epoxy active flexibilizer into the component B, the viscosity of a slurry system is improved, and shearing strength and toughness of a jet-grouted solid are improved; a part of a trimerization catalyst is added into the component A, so release of excess CO2 due to reaction of an isocyanate group with water is effectively inhibited, and the formed jet-grouted solid is compact, does not foam when coming across water and has good mechanical properties; so the epoxy-modified polyurethane-water glass composite grouting material can be extensively applied to fields like reinforcement of coal and rock mass of a coal mine, seepage prevention and leak stoppage.

Description

technical field [0001] The invention belongs to the field of composite material synthesis, and in particular relates to an epoxy-modified polyurethane-water glass composite grouting material and a preparation method thereof. Background technique [0002] Under the action of mine pressure and when encountering geological faults and subsidence columns, the coal mass on the roof of the roadway and working face will scatter, resulting in deformation of the roadway, roof caving, and coal side flakes, which will bring hidden dangers to safe production. [0003] At present, it is commonly used in coal and rock mass reinforcement and plugging in coal mines. Due to its good permeability, low heat of reaction and self-flammability (it only carbonizes but does not burn in case of fire), the polyurethane-water glass grouting material has been researched and practiced on a small scale. construction applications. However, the consolidated body of polyurethane-sodium silicate grouting mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/79C08G18/76C08G18/38C08G18/10C08J9/08C08K3/34
CPCC08G18/10C08G18/36C08G18/7664C08G18/794C08J9/08C08J2203/02C08J2375/04C08K3/34C08G2110/0083C08G2115/02C08G18/302
Inventor 陈建君柏广峰闫宇欣林鹏
Owner SHANXI YUBANG NEW POWER SCI & TECH
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