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Unsaturated siloxane group phosphate emulsion concrete curing agent and preparation method thereof

A technology of siloxane-based phosphate ester and concrete curing agent, which is applied in the field of building materials, and can solve the problems of difficulty in grasping the spraying time of polymer solution and paraffin emulsion curing agent, low adhesion strength of concrete surface, and low water retention rate of water glass curing agent and other problems, to achieve the effect of easy industrial production, simplification of construction procedures, and prevention of capillary channels

Active Publication Date: 2016-02-03
STATE GRID CORP OF CHINA +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the water retention rate of the water glass curing agent is low, and the spraying time of the polymer solution and the paraffin emulsion curing agent is difficult to grasp, and the organic silicon / organic fluorine / acrylic emulsion curing agent has high hydrophobicity, which makes it adhere to the concrete surface. Low price, and the price of organic silicon / organic fluorine is relatively high, which makes the market competitiveness of the product insufficient

Method used

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  • Unsaturated siloxane group phosphate emulsion concrete curing agent and preparation method thereof
  • Unsaturated siloxane group phosphate emulsion concrete curing agent and preparation method thereof
  • Unsaturated siloxane group phosphate emulsion concrete curing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] The first step: add 300g water in the reactor, non-ionic emulsifier alkylphenol polyoxyethylene ether (OP-10) 13.5g, sodium lauryl sulfate 1.5g, p-toluenesulfonic acid 1.50g, under stirring Heat to 80°C, add 95g of vinylmethylene organosiloxane phosphate, 50g of acrylic acid and 32g of methyl acrylate mixture dropwise within three hours, and at the same time add dropwise 1.74g of persulfuric acid within 3.5 hours Potassium aqueous solution 87g, the solution was added dropwise and the reaction was continued for 1 hour at 80°C. Cool down to get 500g of curing agent emulsion.

[0044] The second step: take 50g of the polymer emulsion synthesized in the first step above, add 1g of propylene glycol butyl ether film-forming aid, 1g of polyether defoamer, 5g of cellulose ether thickener, 3g of silicone leveling agent and 40g Water to prepare a high-performance concrete curing agent, its solid content is 24%, and its 72h water retention rate is 75%.

Embodiment 2

[0046] The first step: add 300g water in the reactor, non-ionic emulsifier alkylphenol polyoxyethylene ether (OP-10) 13.5g, sodium lauryl sulfate 1.5g, p-toluenesulfonic acid 1.50g, under stirring Heat to 80°C, add 95g of vinyl ethylene organosiloxane phosphate, 50g of acrylic acid and 32g of methyl acrylate mixture dropwise within 3 hours, and add 1.74g of persulfuric acid in 3.5 hours at the same time Potassium aqueous solution 87g, the solution was added dropwise and the reaction was continued for 1 hour at 80°C. Cool down to get 500g of curing agent emulsion.

[0047] The second step: take 50g of the polymer emulsion synthesized in the first step above, add 1g of propylene glycol butyl ether film-forming aid, 1g of polyether defoamer, 5g of cellulose ether thickener, 3g of silicone leveling agent and 40g Water to prepare a high-performance concrete curing agent, its solid content was 24% in the test, and its water retention rate was 90% in 72 hours.

Embodiment 3

[0049] The first step: add 300g water in the reactor, non-ionic emulsifier alkylphenol polyoxyethylene ether (OP-10) 13.5g, sodium lauryl sulfate 1.5g, p-toluenesulfonic acid 1.50g, under stirring Heat to 80°C, add 95g of vinyl butylene organosiloxane phosphate, 50g of acrylic acid and 32g of methyl acrylate mixture dropwise within 3 hours, and at the same time add 1.74g of potassium persulfate in 3.5 hours 87g of the aqueous solution, the solution was added dropwise and the reaction was continued for 1 hour at 80°C. Cool down to get 500g of curing agent emulsion.

[0050] The second step: take 50g of the polymer emulsion synthesized in the first step above, add 1g of propylene glycol butyl ether film-forming aid, 1g of polyether defoamer, 5g of cellulose ether thickener, 3g of silicone leveling agent and 40g Water, made high-performance concrete curing agent, its solid content was 24% in the test, and the 72h water retention rate was 87%.

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Abstract

The invention relates to an unsaturated siloxane group phosphate emulsion concrete curing agent and a preparation method thereof. The curing agent comprises the following raw materials in percentage by mass: 10-55% of unsaturated siloxane group phosphate, 0-30% of unsaturated acid, 5-40% of unsaturated acid ester, 5-10% of an emulsifying agent, 0.1-0.5% of a catalyst, 0.1-0.5% of an initiating agent, 1-3% of a coalescing agent, 0.1-0.5% of a thickening agent, 1-3% of a leveling agent, 0.01-0.3% of a defoaming agent and the balance of water. The preparation method comprises the following steps: under the condition that the temperature is 60-90 DEG C, dropwise adding each of the unsaturated siloxane phosphate, the unsaturated acid, the unsaturated acid ester and the initiating agent into the water containing the emulsifying agent and the catalyst, and finishing the dropwise adding in 3 hours; and adding the coalescing agent, the thickening agent, the leveling agent and the defoaming agent into the synthesized polymer emulsion to obtain a curing agent finished product. The curing agent is moderate in hydrophobicity and good in water-retaining property, the preparation method of the curing agent is simple and convenient to operate, the condition is easy to control, the curing agent is stable in performance, and the industrial production of the curing agent can be easily realized.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to an unsaturated siloxane-based phosphate emulsion concrete curing agent and a preparation method thereof. Background technique [0002] Concrete curing is an important link in the concrete construction process. After the completion of concrete pouring, different curing methods have very different effects on the evaporation of moisture on the surface and inside of the concrete. The traditional concrete maintenance method is to cover wet sacks, wet straw bags or wet sand and then sprinkle water, which is labor-intensive and time-consuming, and cannot meet the construction requirements of beams and columns of high-rise buildings, large buildings, and water-deficient and arid areas. For this reason, various curing agents have been developed at home and abroad to smear or spray on the concrete surface. Compared with traditional curing methods, curing agents have the advan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B40/04
Inventor 马临涛王少江李幼胜张军夏万求田军涛陈改新纪国晋
Owner STATE GRID CORP OF CHINA
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