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Hydrophobic polymer emulsion and its application

A polymer emulsion and hydrophobic technology, which is applied in the field of hydrophobic polymer emulsion synthesis and waterproof system construction, can solve the problems of loss of waterproof function, reduced strength, and easy foaming of the coating, so as to ensure the service life and delay the corrosion of steel bars. , The effect of resisting salt spray erosion

Inactive Publication Date: 2014-08-13
沈南生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Too much emulsion generally forms a polymer network structure, which cannot exert the performance of concrete, and the strength is low, and in the case of frequent contact with water, the coating is prone to foaming or lower strength, resulting in loss of waterproof function
[0004] According to new research, there is no report on the use of hydrophobic polymer emulsions and cement mixtures to construct hydrophobic and waterproof systems.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] hydrophobic emulsion polymerization

[0027] 1. Monomer pre-emulsification

[0028] Add water and emulsifier into the reaction kettle, start stirring, add the mixed monomers, perform pre-emulsification, and pump the pre-emulsion to the high-level tank.

[0029] 2. Add primer to the reaction kettle and heat to 75~80℃.

[0030] 3. Add a certain amount of pre-emulsion and the corresponding amount of initiator prepared in advance to carry out seed polymerization.

[0031] 4. After no reflux, add the pre-emulsion and initiator continuously at a constant flow rate. Keep the temperature constant.

[0032] 5. After the reaction is finished, cool down and discharge, the solid content of the emulsion is controlled at 50±2%, Tg: -3°C.

[0033] Production of hydrophobic and waterproof materials

[0034] 1. Mix cement, quartz sand and heavy calcium powder in a ratio of 1:1.2:0.3 through a mixer and pack. It is the powder component.

[0035] 2. Mix the hydrophobic emulsion, wa...

Embodiment 2

[0038] Waterproof construction of basements, swimming pools, dams, and cross-sea bridge piers: directly mix the hydrophobic emulsion of the present invention into the concrete of the above-mentioned projects, and the mixing amount is 6-12% of the concrete amount, and the concrete mixing ratio test must be done before construction , to ensure that the concrete has the designed mechanical properties. Mixing hydrophobic emulsion can make the concrete structure have hydrophobic properties. This method can effectively prevent the diffusion of water and soluble salts carried into the concrete, and protect the steel bars inside the structure from being corroded.

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Abstract

The invention provides a hydrophobic polymer emulsion and its application. An emulsification system having little influence on the cement performances including setting time, compressive strength and flexural strength and functional monomers are synthesized into a hydrophobic polymer emulsion for a polymer cement base waterproof material by an emulsion polymerization method; and then on the basis of the hydrophobic polymer emulsion, the polymer cement base waterproof material can be manufactured. The material has excellent waterproof and moisture-proof performances, can be used for water and moisture prevention of toilet, wall, roofing and basement of buildings, and bridge and tunnel; and the material has good affinity with cement mortar, and the waterproof layer surface can be directly coated with the cement mortar, without affecting the bond behavior.

Description

technical field [0001] The invention belongs to the technical field of hydrophobic polymer emulsion synthesis and waterproof system construction, and in particular relates to a method for synthesizing a hydrophobic polymer emulsion integrated with cement performance and preparing a hydrophobic waterproof material. Background technique [0002] Cement-based polymer emulsion has been widely used as building waterproof material in our country. However, due to the inherent structural pores of cement mortar and concrete and the hydrophilic characteristics of the emulsion, when wet or in contact with water, water will enter the interior of the waterproof layer through these pores, and the waterproof coating is basically in a water-wet state, which will result in The wall on the water surface is relatively damp, which may cause mildew and deterioration of the furniture against the wall in the long run, affecting the use function. In basements, humid air has a detrimental effect on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B24/26C04B111/27
Inventor 沈南生沈航
Owner 沈南生
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