Preparation method of water-based fluorine-acrylic acid-containing self-stratifying emulsion for protection of concrete surface

A concrete surface, acrylic technology, applied in the direction of coating, can solve the problems of environmental pollution, high cost of single-layer paint film, etc., and achieve the effect of reducing cost, overcoming narrow ratio range and superior performance

Active Publication Date: 2015-04-08
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of high cost of a single-layer paint film with good performance in the existing concrete protection, and the problem of environmental pollution caused by the use of solvents

Method used

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  • Preparation method of water-based fluorine-acrylic acid-containing self-stratifying emulsion for protection of concrete surface
  • Preparation method of water-based fluorine-acrylic acid-containing self-stratifying emulsion for protection of concrete surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]1) Preparation of fluorine-modified acrylic core-shell emulsion: Weigh 30.3g of methyl methacrylate, 19.7g of butyl acrylate, and 1g of acetoacetoxyethyl methacrylate (AAEM) and stir evenly to form the core mixed monomer. Weigh 23.9g of methyl methacrylate, 26.1g of butyl acrylate, and 1g of hexafluorobutyl acrylate and stir evenly to form a shell mixed monomer. Take 10g core mixed monomer, 1g sodium dodecylsulfonate (SDS), 1g octylphenol polyoxyethylene ether-10 (OP-10), 97.4g water, 0.17g ammonium persulfate (APS), 0.3 g of sodium bicarbonate was stirred evenly, heated to 80° C. in a water bath to initiate polymerization, and kept warm for 30 minutes to obtain a seed emulsion. The remaining shell mixed monomer, 10 g aqueous solution dissolved with 0.17 g ammonium persulfate (APS) were added to the seed emulsion at a constant speed, respectively. The dropping time is 1-1.5h. After 30 minutes of heat preservation, the shell mixed monomer and 10 g of aqueous solution di...

Embodiment 2

[0040] 1) Preparation of fluorine-containing modified acrylic core-shell emulsion: Weigh 18.3g methyl methacrylate, 12g styrene, 19.7g butyl acrylate, 1g acetoacetoxyethyl methacrylate (AAEM) and stir evenly to form the core mixture monomer. Weigh 23.9g of methyl methacrylate, 26.1g of butyl acrylate, and 1g of hexafluorobutyl acrylate and stir evenly to form a shell mixed monomer. Take 10g core mixed monomer, 1g sodium dodecylsulfonate (SDS), 1g octylphenol polyoxyethylene ether-10 (OP-10), 97.4g water, 0.17g ammonium persulfate (APS), 0.3 g of sodium bicarbonate was stirred evenly, heated to 80° C. in a water bath to initiate polymerization, and kept warm for 30 minutes to obtain a seed emulsion. The remaining shell mixed monomer, 10 g aqueous solution dissolved with 0.17 g ammonium persulfate (APS) were added to the seed emulsion at a constant speed, respectively. The dropping time is 1-1.5h. After 30 minutes of heat preservation, the shell mixed monomer and 10 g of aque...

Embodiment 3

[0044] 1) Preparation of fluorine-modified acrylic core-shell emulsion: Weigh 36.1g of ethyl methacrylate, 13.9g of butyl acrylate, and 2g of acetoacetoxyethyl methacrylate (AAEM) and stir evenly to form the core mixed monomer. Weigh 28.5g of ethyl methacrylate, 21.5g of butyl acrylate, and 5g of hexafluorobutyl acrylate and stir evenly to form a shell mixed monomer. Take 10g core mixed monomer, 1g sodium dodecylsulfonate (SDS), 1g octylphenol polyoxyethylene ether-10 (OP-10), 97.4g water, 0.17g ammonium persulfate (APS), 0.3 g of sodium bicarbonate was stirred evenly, heated to 80° C. in a water bath to initiate polymerization, and kept warm for 30 minutes to obtain a seed emulsion. The remaining shell mixed monomer, 10 g aqueous solution dissolved with 0.17 g ammonium persulfate (APS) were added to the seed emulsion at a constant speed, respectively. The dropping time is 1-1.5h. After 30 minutes of heat preservation, the shell mixed monomer and 10 g of aqueous solution dis...

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Abstract

The invention provides a preparation method of water-based fluorine-acrylic acid-containing self-stratifying emulsion for protection of a concrete surface. A fluorine-containing modified acrylic acid core-shell emulsion prepared by adopting an emulsion polymerization method, an acrylic acid core-shell emulsion, various auxiliaries and water are prepared into a self-stratifying emulsion for protection of concrete surface, the coating technology is simplified, the excellent weather resistance, contamination resistance, hydrophobic and oleophobic property advantages of the fluorine-containing (methyl) acrylate can be played to the greatest extent, the environment protection can be achieved, and the cost can also be lowered.

Description

technical field [0001] The invention relates to a preparation method of a water-based fluorine-acrylic acid self-layering emulsion for concrete surface protection. Background technique [0002] During its service, concrete is exposed to the erosion of many harmful external media, especially carbon dioxide and chloride ions. The cracking problem caused by the corrosion and expansion of steel bars caused by carbon dioxide and chloride ion erosion is a common problem in engineering, which seriously reduces the durability and service life of concrete. The outer surface of concrete is often subjected to temperature changes, water erosion, alternating dry and wet cycles, freeze-thaw cycles, etc., resulting in continuous weathering, erosion, and carbonization, which gradually intensify over time, and ultimately endanger the safety of engineering structures. [0003] The current method to solve this problem mainly includes the following three aspects: 1. In the process of concrete...

Claims

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Application Information

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IPC IPC(8): C09D133/12C09D133/10C08F220/14C08F220/18C08F212/08C08F220/22C08F220/34C08F2/26C08F2/30C04B41/48
CPCC04B41/483C08F2/26C08F2/30C08F212/08C08F220/14C08F220/18C08F220/1804C08F220/1808C08F220/22C08F220/34C09D133/10C09D133/12C08L33/10C08K5/103C08K5/12C08K5/05C08L33/12
Inventor 李磊蒋永菁王洪松王瑞田倩
Owner JIANGSU SOBUTE NEW MATERIALS
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