Elastic grouting water-stop glue

A water-stop glue and grouting technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problems of unsuitable dry and wet alternating environment, poor durability, and structural leakage, etc. Achieve the effect of cleanliness, stable and controllable grouting quality, and improved service life of the engineering construction environment.

Pending Publication Date: 2022-04-05
SHENYANG GUOJIAN XINTEC TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Poor durability and serious double leakage
[0004] "Oil-based" foamed polyurethane grouting fluid expands and blocks cracks when it encounters water, but the high expansion of the material causes secondary damage to the structure. The foamy solidified structure is fluffy and inelastic, and crack expansion and contraction deformation will cause the plugging material to break. The water-stop function is lost, so that the structure damaged by high expansion will leak again, and the leakage is more serious than the original one; "water-based" foamed polyurethane has a faster reaction speed than oily, can block urgent water and has strong impermeability, However, when it swells with water, it becomes a gel-like conglomerate (also foaming). Its fatal weakness is that the gel-like conglomerate is a gel with a high water content, and its shrinkage ratio due to water loss is very high, resulting in a very large volume change before and after encountering water. Large, basically loses the water blocking effect after drying, and the re-leakage rate is extremely high
[0005] When acrylate meets water, it forms a kind of gel, which is similar to "jelly" and has basically no cohesive force and strength. Because the interior is basically water, the water loss shrinkage ratio is also very high, and because there is not much cohesive force and strength, so it is easy to be squeezed out or crushed by external force, resulting in double leakage
Therefore, acrylate is not suitable for alternating dry and wet environments, and is not suitable for plugging permanent structural defects
[0006] 2. Not environmentally friendly
[0009] In summary, the main problems of the plugging materials in the prior art are: high dehydration shrinkage ratio, no strength, easy extrusion due to force due to weak cohesive force, poor durability, fragility caused by high expansion, and some contain organic solvents or the use of non-environmentally friendly raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 41kg of polyether polyol, 18kg of chlorinated paraffin and 0.1kg of polysiloxane into the reaction kettle, vacuumize, stir and heat up to 120°C, keep stirring and keep warm, close the reaction kettle for 3 hours, and the reaction is complete After that, keep it for another 1 hour, release the closed system of the reactor to discharge, and obtain the A component;

[0026] Add 7.6kg of polyphenyl polymethylene polyisocyanate, 1.5kg of dioctyl phthalate, 2.5kg of diisooctyl terephthalate, 5.5kg of dinonyl phthalate into the reaction kettle and vacuumize it. Stir and heat up to 100°C to react for 3 hours. After the reaction is complete, lower the temperature to 85°C, add 0.1 kg of n-octadecanyl propionate and stir for 1 hour, release the closed system of the reactor to discharge, and obtain component B;

[0027] Add 59.1kg of component A and 17.2kg of component B into the reaction kettle, vacuumize and stir to heat to 120°C, then continue to add 23.5kg of calcium carb...

Embodiment 2

[0029] Weigh 40kg of polyether polyol, 18kg of fatty acid methyl ester and 0.3kg of distearyl thiodipropionate into the reaction kettle, vacuumize, stir and heat up to 120°C, keep stirring and keep warm, close the reaction kettle, Continue for 3 hours, after the reaction is completed, keep for another 1 hour, release the closed system of the reactor to discharge, and obtain component A;

[0030] Add 7.7kg of polyphenyl polymethylene polyisocyanate, 1.5kg of diisooctyl terephthalate, 2.5kg of dinonyl phthalate, 5.5kg of butyl benzyl phthalate into the reaction kettle. kg, vacuumize, stir, heat up to 100°C and react for 3 hours. After the reaction is completed, cool down to 85°C, add 0.3 kg of n-octadecanyl propionate and stir for 1 hour, release the closed system of the reactor and discharge, and obtain B components;

[0031] Add 58.3kg of component A and 17.5kg of component B into the reaction kettle, vacuumize and stir to heat to 120°C, then continue to add 24kg of diatomace...

Embodiment 3

[0033] Weigh 40.2kg of polyether polyol, 18.2kg of chlorinated paraffin and 0.2kg of distearyl thiodipropionate, add them into the reaction kettle, vacuumize and stir, heat up to 120°C, keep stirring and keep warm, close The reaction kettle lasts for 3 hours. After the reaction is completed, it is kept for another 1 hour, and the closed system of the reaction kettle is discharged to obtain the A component;

[0034] Add 7.6kg of polyphenyl polymethylene polyisocyanate, 1.5kg of diisooctyl terephthalate, 2.3kg of dinonyl phthalate, 5.0kg of di-second-octyl phthalate into the reaction kettle, pump Stir in vacuum, heat up to 100°C and react for 3 hours. After the reaction is complete, lower the temperature to 85°C, add 0.3 kg of dicinnamoylthiodipropionate and stir for 1 hour, release the closed system of the reactor and discharge, and obtain component B ;

[0035] Add 58.6kg of component A and 16.7kg of component B into the reaction kettle, vacuumize, stir and heat to 120°C, the...

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PUM

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Abstract

The invention relates to elastic grouting water-stop glue. The invention relates to a polyurethane hot melt adhesive which comprises the following components in percentage by weight: 40%-41% of polyether polyol, 7.3%-7.7% of polyphenyl polymethylene polyisocyanate, 26%-28.5% of plasticizer, 23.5%-24.5% of filler, 0.2%-0.4% of pigment and 0.2%-0.6% of antioxidant. The plasticizer is prepared by mixing four of dioctyl phthalate, diisooctyl terephthalate, dinonyl phthalate, butyl benzyl phthalate, di-sec-octyl phthalate, fatty acid methyl ester, acetyl tributyl citrate, tributyl citrate and chlorinated paraffin; the plasticizer is prepared by mixing four of dioctyl phthalate, diisooctyl terephthalate, dinonyl phthalate, butyl benzyl phthalate, di-sec-octyl phthalate, fatty acid methyl ester, acetyl tributyl citrate, tributyl citrate and chlorinated paraffin; the antioxidant is formed by mixing one or two of octadecanol propionate, bis (stearoyl) thiodipropionate, bis (cinnamoyl) thiodipropionate and polysiloxane; the antioxidant is formed by mixing one or two of octadecanol propionate, bis (stearoyl) thiodipropionate, bis (cinnamoyl) thiodipropionate and polysiloxane; the filler is formed by mixing one or two of calcium carbonate, diatomite, talcum powder and carbon fiber; the pigment is formed by mixing one or two of carbon black and graphite.

Description

technical field [0001] The invention relates to an elastic grouting waterproof glue. Background technique [0002] The existing problems of the main grouting plugging materials are as follows: [0003] 1. Poor durability and serious double leakage [0004] "Oil-based" foamed polyurethane grouting fluid expands and blocks cracks when it encounters water, but the high expansion of the material causes secondary damage to the structure. The foamy solidified structure is fluffy and inelastic, and crack expansion and contraction deformation will cause the plugging material to break. The water-stop function is lost, so that the structure damaged by high expansion will leak again, and the leakage is more serious than the original one; "water-based" foamed polyurethane has a faster reaction speed than oily, can block urgent water and has strong impermeability, However, when it swells with water, it becomes a gel-like conglomerate (also foaming). Its fatal weakness is that the gel-l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J11/04C08G18/48C08G18/76C08K5/12C08K5/101C08K5/372C08K5/11
Inventor 姜伟
Owner SHENYANG GUOJIAN XINTEC TECH DEV
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