Cement hydrophober and method for preparing same

A technology of water repellent and cement, which is applied in the field of cement water repellent, which can solve the problems of high cost of water repellent and water repellent, and achieve the effect of excellent waterproof and water repellent performance, easy availability of raw materials, and small particle size

Active Publication Date: 2010-04-07
苏州盛泽科技创业园发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Zhang Jie used stearic acid, potassium hydroxide, triethanolamine, citric acid, silicone oil, and emulsifiers to prepare waterproof and hydrophobic agents in TECHNOLOGY (2004 / 7) "The Production of Waterproof and Hydrophobic Agents" through internal blending and external coating. In cement mortar, concrete, and gypsum, the waterproof and hydrophobic effects are better, but the cost of the waterproof and water-repellent agent is relatively high, and it has obvious defoaming side effects when used in air-bubble mixed lightweight concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 100 grams of lauric acid to a four-necked flask with a thermometer, raise the temperature to 85°C, and after it is completely melted, add 0.37 grams of sorbitan trioleate with stirring, and then add 74 grams of calcium hydroxide to 1570.68 grams Form a suspension in deionized water, then add it to the flask, keep it warm for 1 hour, add 0.15 g of emulsifier octylphenol polyoxyethylene ether, continue stirring for 2 hours, cool down to normal temperature, the average particle size of the obtained product is 20nm, and the viscosity 500cps, solid content 10%. Particle size test method: JL-1155 laser particle size distribution tester; Viscosity: NDJ-1 viscometer, 2# rotor 60rpm.

Embodiment 2

[0020] Add 100 grams of stearic acid into a four-necked flask with a thermometer, raise the temperature to 80 ° C, and after it is completely melted, add 0.1 grams of emulsifier sorbitan stearate under stirring, and then add 10.2 grams of magnesium hydroxide Add 331 grams of deionized water to form a suspension, add it to the flask, and react for 2 hours, then add 0.1 grams of emulsifier polyoxyethylene sorbitan monooleate, keep the temperature down to normal temperature after 1 hour of heat preservation reaction, and obtain the product The average particle size is 65nm, the viscosity is 250cps, and the solid content is 25%. Test method is the same as embodiment 1.

Embodiment 3

[0022] Add 100 grams of triacic acid to a four-neck flask with a thermometer, raise the temperature to 90°C, and after it is completely melted, add 0.54 grams of emulsifier polyether L81 under stirring, and add 18 grams of zinc oxide to 277 grams of Ionized water was added in the flask, reacted for 3 hours, further added 0.36 grams of emulsifier polyoxyethylene sorbitan monostearate, and cooled to room temperature after 3 hours of heat insulation reaction, the average particle diameter of the product obtained was 120nm, viscosity 80cps, solid Content 30%. Test method is the same as embodiment 1.

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PUM

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Abstract

The invention provides a cement moisture repel and a process for preparation. The steps comprise heating higher fatty acid to melt, adding with emulsifying agent A, then adding basic compounds aqueoussuspension to react in 1-4 hours with the temperature of 80-90 DEG C, adding with emulsifying agent B to stir and emulsify, and then obtaining the cement moisture repel, wherein the quality of addition of the emulsifying agent A is 0.5-5% of the quality of the basic compounds, the emulsifying agent B is 0.2-3% of the basic compounds, and the mol ratio of the higher fatty acid and the basic compounds is 1:0.5-2. The process for preparation of the invention is simple in process route, easy to obtain raw materials and low in cost, and has the advantages of small grain diameter, low viscosity, fine stability, low usage and excellent water resistance and hydrophobicity performance. Further, the cement moisture is provided with the excellent hydrophobicity performance in light-weight mixed concrete with air-bubble, simultaneously overcomes shortages of defoaming for the light-weight mixed concrete with air-bubble in the prior art.

Description

technical field [0001] The invention relates to a cement water-repellent agent for construction and a preparation method thereof, and is especially suitable for the cement water-repellent agent in air-bubble mixed lightweight concrete. Background technique [0002] There are many types of water-repellent and hydrophobic products for construction in the market, including powder, paste, and emulsion. Among them, the emulsion-type water-repellent is popular because of its convenience. [0003] Waterproof and hydrophobic agents are generally divided into two types: one is non-reactive, mixed in cement mortar, concrete, and gypsum, and its active ingredients and inorganic substances are only inert and mechanically filled with each other. This type of waterproof 1. The amount of water-repellent agent is large, and the effect is not long-lasting; the other type is reactive, that is, a chemical reaction occurs between the waterproof and water-repellent active ingredients and the cem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/42C04B24/08
Inventor 施晓旦李丽王养臣
Owner 苏州盛泽科技创业园发展有限公司
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