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Hydrophobic pore-blocking ingredient emulsion and preparation method thereof

A hydrophobic and embolism technology, which is applied in the field of preparation of hydrophobic compound pore embolism emulsion, can solve the problems of poor defoaming effect of tiny bubbles, and achieve the effects of eliminating bubbles, low foaming, and reducing viscosity

Active Publication Date: 2019-09-20
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the strong hydrophilicity of long-chain fatty acids, they are solid at room temperature. The existing solution is to use silicone defoamers. However, silicone defoamers have a good defoaming effect on large bubbles in the system. The defoaming effect is poor

Method used

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  • Hydrophobic pore-blocking ingredient emulsion and preparation method thereof
  • Hydrophobic pore-blocking ingredient emulsion and preparation method thereof
  • Hydrophobic pore-blocking ingredient emulsion and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A hydrophobic compound pore embolus emulsion, its composition and proportion are respectively: 10wt% of hardened oil, 15wt% of ammonia water, 0.1wt% of defoaming and antifoaming agent, 1wt% of emulsifier, and the balance is water; wherein, the The mass concentration of ammonia water is 15%.

[0029] The preparation method of the hydrophobic compound pore embolus emulsion provided in this example, the specific steps are as follows: put 60g of hardened oil in a three-necked flask and heat it to 90°C to dissolve it for 10 minutes. After dissolving, add a few drops of ammonia water and 443.4g of water, then quickly stir and disperse at 1100r / min at 90°C for 1h; then, add the remaining 90g of ammonia water, 6g of emulsifier and 0.6g of defoaming and antifoaming agent at 65°C and stir at a medium speed of 750r / min for 3h ; Finally, slow down to room temperature with 450r / min stirring to obtain a hydrophobic compound pore embolus emulsion.

Embodiment 2

[0031] A hydrophobic compound pore embolus emulsion, its composition and proportion are respectively: 11wt% of hardened oil, 18wt% of ammonia water, 0.15wt% of defoaming and antifoaming agent, 1.3wt% of emulsifier, and the balance is water; The stated ammonia mass concentration is 18%.

[0032] The preparation method of the hydrophobic compound pore embolus emulsion provided in this example, the specific steps are as follows: put 66g of hardened oil in a three-necked flask and heat it to dissolve at a temperature of 90°C. The heating time is 10min. After dissolving, add a few drops of ammonia water and 417.3g of water, then quickly stir and disperse at 1200r / min at 90°C for 1h; then, add the remaining 108g of ammonia water, 7.8g of emulsifier and 0.9g of defoaming and antifoaming agent and stir at 60°C at a medium speed of 900r / min for ammoniation 3h; finally, slowly stir at 300r / min and cool down to room temperature to obtain a hydrophobic compound pore embolus emulsion.

Embodiment 3

[0034] A hydrophobic compound pore embolus emulsion, its composition and proportion are respectively: 13wt% of hardened oil, 22wt% of ammonia water, 0.3wt% of defoaming and antifoaming agent, 1.7wt% of emulsifier, and the balance is water; The stated ammonia mass concentration is 22%.

[0035] The preparation method of the hydrophobic compound pore embolus emulsion provided in this example, the specific steps are as follows: put 78g of hardened oil in a three-necked flask and heat it to 90°C to dissolve it for 10 minutes. After dissolving, add a few drops of ammonia water and 378g of water, then stir and disperse rapidly at 90°C at 900r / min for 1h; then, add the remaining 132g of ammonia water, 10.2g of emulsifier and 1.8g of defoaming and antifoaming agent and stir at 65°C at a medium speed of 600r / min for 3h; Finally, stirring at a slow speed of 400 r / min and cooling down to room temperature to obtain a hydrophobic compound pore embolus emulsion.

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Abstract

The invention relates to a hydrophobic pore-blocking ingredient emulsion and a preparation method thereof, wherein the raw materials mainly comprise hardening oil, an emulsifier, ammonia water, an antifoaming agent methyl high-oxygen-content silicone oil-isooctyl acrylate adduct, and water. According to the present invention, the ammoniation temperature is below a triple point temperature of 60-70 DEG C, wherein the long-chain fatty acid can be directly aminated to form a long-chain fatty acid salt emulsion without dissolution precipitation at the temperature; the methyl high-oxygen-content silicone oil-isooctyl acrylate adduct is used as the antifoaming agent so as to reduce the precipitation of long-chain fatty acid salts, eliminate a large number of bubbles present in the system, and avoid the problem of emulsion solidification due to bubbles; and the hydrophobic pore-blocking ingredient emulsion has low viscosity, can be preserved for a long time at high temperature and low temperature, and can significantly reduce the water absorption rate and the electric flux of concrete and improve the service life of concrete at a certain adding amount.

Description

technical field [0001] The invention belongs to the technical field of preparation of concrete waterproofing agent, and in particular relates to a method for preparing a hydrophobic compound pore plug emulsion. Background technique [0002] Hydrophobic compound pore embolism emulsion is a compound chemical building material. A large number of engineering practices have proved that adding an appropriate amount of hydrophobic compound pore embolism emulsion into concrete can improve the performance of concrete and reduce the water absorption and electrical conductivity of concrete. increase the service life of concrete. Among the hydrophobic compound pore plugs, they are usually divided into three series: fatty acid salts, silicones and renewable polymer powders, among which saturated fatty acid glycerides are widely used. However, saturated fatty acid glycerides can be dispersed in neutral alkaline aqueous systems in any proportion, and can effectively reduce the surface ten...

Claims

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Application Information

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IPC IPC(8): C04B24/42C04B103/65
CPCC04B40/0039C04B2103/65C04B24/085C04B24/32C04B22/06C04B24/42
Inventor 张超灿阮家浩
Owner WUHAN UNIV OF TECH
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