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Waterborne polyurethane-epoxy interpenetrating network superfine cement compound grouting material, preparation method thereof and application of grouting material

A technology of waterborne polyurethane and interpenetrating network, which is applied in the field of waterborne polyurethane-epoxy interpenetrating network ultrafine cement composite grouting material and its preparation, can solve the problem of low compressive strength and bonding strength of waterborne epoxy resin and cement-based grouting materials. Poor permeability of grouting materials, high toxicity of solvent-based epoxy resin, etc., to achieve the effect of increasing environmental protection, storage stability and water resistance, and increasing storage stability

Inactive Publication Date: 2018-02-23
GUANGZHOU CHEM GROUTING CO LTD CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used perfusion materials mainly include polyurethane, epoxy resin, and cement-based grouting materials, but polyurethane grouting materials have poor durability, solvent-based epoxy resins are more toxic, solvent-free epoxy resins are more brittle, and water-based epoxy resins are more brittle. The compressive strength and bonding strength of the resin are low, the permeability of the cement-based grouting material is poor, and it is prone to settlement, bleeding, and poor compatibility with old concrete. train operation

Method used

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  • Waterborne polyurethane-epoxy interpenetrating network superfine cement compound grouting material, preparation method thereof and application of grouting material
  • Waterborne polyurethane-epoxy interpenetrating network superfine cement compound grouting material, preparation method thereof and application of grouting material
  • Waterborne polyurethane-epoxy interpenetrating network superfine cement compound grouting material, preparation method thereof and application of grouting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of A component

[0032] In a closed reactor, add 90.0 g of polyether diol (GE-210), dehydrate for 2 hours at a temperature of 105 °C and a vacuum of -0.080 MPa, cool down to 50 °C, add 2,6-toluene di Isocyanate (TDI) 43.9g, heat up to 85°C, add catalyst dibutyltin dilaurate (DBTDL) 0.1g, react for 3h, then add 6.7g of dihydroxymethylpropionic acid at 80°C, react for 3h, gradually add polymerization To obtain a hydrophilic polyurethane prepolymer, cool down to 75°C, add 32.1g of unopened epoxy resin (E-51), and react for 4h to obtain a polyurethane-epoxy resin interpenetrating network polymer; continue to cool down to 50°C , add ring opener diethanolamine 8.6g, stir and react for 8h. After that, continue to cool down to 30°C, add 5.1g of triethylamine for neutralization reaction for 30min, add an appropriate amount of deionized water 345.4g under high-speed stirring, and obtain 520.0g of component A after shearing and dispersing for 45min.

[0033] (2) ...

Embodiment 2

[0037] (1) Preparation of A component

[0038] In a closed reactor, add 90.0g of polyether diol (GE-210), dehydrate at a temperature of 110°C and a vacuum of -0.083MPa for 2.5h, cool down to 52°C, and add 2,6-toluene Diisocyanate (TDI) 47.0g, heat up to 80°C, add catalyst dibutyltin dilaurate (DBTDL) 0.2g, react for 3.5h, then at 75°C, add 7.0g of dihydroxymethylpropionic acid, react for 3.5h, gradually Addition polymerization to obtain a hydrophilic polyurethane prepolymer, lower the temperature to 70 ° C, add 35.1 g of unopened epoxy resin (E-51), and react for 4.5 hours to obtain a polyurethane-epoxy resin interpenetrating network polymer; continue The temperature was lowered to 55°C, 9.4 g of a ring-opening agent diethanolamine was added, and the reaction was stirred for 8.5 hours. After that, continue to cool down to 35°C, add 5.3g of triethylamine to neutralize the reaction for 40 minutes, add an appropriate amount of deionized water 537.3g under high-speed stirring, an...

Embodiment 3

[0043] (1) Preparation of A component

[0044] In a closed reactor, add 90.0 g of polyether diol (GE-210), dehydrate for 3 hours at a temperature of 115 °C and a vacuum of -0.086 MPa, cool down to 55 °C, add 2,6-toluene di Isocyanate (TDI) 50.2g, heat up to 85°C, add catalyst dibutyltin dilaurate (DBTDL) 0.3g, react for 4h, then add 8.4g of dihydroxymethylpropionic acid at 75°C, react for 4h, gradually add polymerization To obtain a hydrophilic polyurethane prepolymer, cool down to 70°C, add 39.2g of unopened epoxy resin (E-51), and react for 5h to obtain a polyurethane-epoxy resin interpenetrating network polymer; continue to cool down to 50°C , Add ring opener diethanolamine 10.5g, stir and react for 9h. Afterwards, continue to lower the temperature to 40°C, add 6.4g of triethylamine for neutralization reaction for 45min, add an appropriate amount of deionized water 563.4g under high-speed stirring, and obtain 760.0g of component A after shearing and dispersing for 60min. ...

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PUM

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Abstract

The invention discloses a waterborne polyurethane-epoxy interpenetrating network superfine cement compound grouting material, a preparation method thereof and an application of the grouting material.The grouting material comprises a first component, a second component and superfine cement, and the weight ratio of the first component, the second component to the superfine cement is (0.5-0.7):0.01:1. By the aid of molecular structure design, epoxy resin is modified by waterborne polyurethane, a polyurethane structure is introduced into an epoxy resin molecular chain to form a waterborne polyurethane-epoxy interpenetrating network structure, the flexibility and the impact resistance of the epoxy resin are improved, the excellent adhesive property of the epoxy grouting material is kept, the prepared grouting material is free from any volatile solvents, and the environmental protection property of the grouting material is enhanced.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a water-based polyurethane-epoxy interpenetrating network ultrafine cement composite grouting material and its preparation method and application. Background technique [0002] my country's urban rail transit maintains a momentum of rapid development, but high-speed rail tunnels, subway stations, subway tunnels, water leakage from structural deformation joints, water leakage from construction joints, water seepage from structural concrete, and cracks on concrete are common problems encountered in the construction and operation of rail transit , the most effective way to control this disease is the grouting method. The currently used perfusion materials mainly include polyurethane, epoxy resin, and cement-based grouting materials, but polyurethane grouting materials have poor durability, solvent-based epoxy resins are more toxic, solvent-free epoxy resins are more brittle, and wat...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/70
CPCC04B28/04C04B2111/70C04B2201/10C04B2201/20C04B2201/50C04B24/281C04B24/282C04B24/121C04B24/32C04B24/008
Inventor 杨元龙陈绪港曾娟娟张文超于方吴龙梅
Owner GUANGZHOU CHEM GROUTING CO LTD CAS
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