Anti-corrosive waterborne coating and preparation method thereof

A water-based coating, anti-corrosion technology, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as poor water resistance and anti-corrosion performance, organic solvent volatilization, etc., to achieve good anti-corrosion, simple steps, The effect of good stability

Inactive Publication Date: 2019-01-25
广东鑫皇冠新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solvent-based anti-corrosion coatings are usually selected for metal substrates or the surface of some large-scale steel frame structures. However, a large amount of organic solvents will volatilize during the construction process of solvent-based coatings, which seriously pollutes the environment; the environmentally friendly coatings currently on the market are powder-based Coatings, solvent-free coatings and water-soluble coatings, among them, water-soluble coatings not only save a lot of raw materials because their solvents are replaced by water, but also greatly reduce environmental pollution
Waterborne polyurethane coating system has good hydrophilicity, but relatively poor water resistance and corrosion resistance

Method used

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  • Anti-corrosive waterborne coating and preparation method thereof
  • Anti-corrosive waterborne coating and preparation method thereof
  • Anti-corrosive waterborne coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The present embodiment proposes a kind of anti-corrosion water-based paint, and described anti-corrosion water-based paint comprises the following components by weight percentage:

[0026]

[0027]

[0028] The phosphate-modified polyurethane emulsion includes 5-10% of functional phosphate, 52-69% of polymerized polyol, 20-35% of polyisocyanate, and 0-30% of water;

[0029] The functional phosphate is formed by reacting phosphorus oxide and β-hydroxyethyl methacrylate in a ratio of 1:3.

[0030] The preparation method of the phosphate-modified polyurethane emulsion phosphate-modified polyurethane emulsion is as follows: add the functional phosphate, polymerized polyol, polyisocyanate, and water into the disperser according to the corresponding proportion, and use the rotating speed of 1200-1400r After stirring for 15-40 min, the phosphate-modified polyurethane emulsion was obtained.

[0031] The modified nano-titanium dioxide comprises the following components: ...

Embodiment 2

[0042] The present embodiment proposes a kind of anti-corrosion water-based paint, and described anti-corrosion water-based paint comprises the following components by weight percentage:

[0043]

[0044] The modified nano-titanium dioxide comprises the following components:

[0045]

[0046] Present embodiment also provides a kind of preparation method of anti-corrosion water-based paint:

[0047] (1) Add the γ-ureidopropyltriethoxysilane into the nano-titanium dioxide, stir for 30 minutes under heating conditions, add the ethyl orthosilicate after the stirring is completed, and continue stirring for 60 minutes.

[0048] (2) Add the functional phosphoric acid ester, polymerized polyol, polyisocyanate ester, and water into the disperser in corresponding proportions, and stir at a rotation speed of 1200 r / min for 15 minutes to obtain the phosphoric acid ester modified polyurethane emulsion.

[0049] (3) Under the condition of stirring, the described phosphate modified po...

Embodiment 3

[0051] The present embodiment proposes a kind of anti-corrosion water-based paint, and described anti-corrosion water-based paint comprises the following components by weight percentage:

[0052]

[0053] The modified nano-titanium dioxide comprises the following components:

[0054]

[0055] Present embodiment also provides a kind of preparation method of anti-corrosion water-based paint:

[0056] (1) Add the γ-ureidopropyltriethoxysilane into the nano-titanium dioxide, stir for 50 minutes under heating conditions, add the ethyl orthosilicate after the stirring is completed, and continue stirring for 80 minutes.

[0057] (2) Add the functional phosphoric acid ester, polymerized polyol, polyisocyanate ester, and water into the disperser in corresponding proportions, and stir for 40 min at a rotational speed of 1400 r / min to obtain the phosphoric acid ester modified polyurethane emulsion.

[0058] (3) under the condition of stirring, add the described phosphate ester modif...

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Abstract

The invention discloses an anti-corrosive waterborne coating and a preparation method thereof. The anti-corrosive waterborne coating is prepared from the following components in percentage by weight:45-60 percent of phosphate ester modified polyurethane emulsion, 8-16 percent of modified nanometer titanium dioxide, 5-8 percent of pigment and filler, 1-2 percent of thickener, 0-1 percent of dispersant, 0-1 percent of flatting agent, 0.5-1.5 percent of defoamer, 1-3 percent of film-forming additive and 8-14 percent of water. The phosphate ester modified polyurethane emulsion has very good hydrophilicity, so that a whole coating system has better stability and corrosion resistance; with addition of the modified nanometer titanium dioxide, a rough micron-nanometer mamma convex-shaped hydrophobic structure is formed on the surface of the coating, so that the hydrophobicity of the coating is added, and the coating effectively prevents metal from being contacted to other alloy and is taken as a barrier of the surface of the metal in a humid environment; and in addition, a solvent is the water, so that the coating is environmentally friendly without pollution.

Description

technical field [0001] The invention relates to the field of coatings, in particular to an anti-corrosion water-based coating and a preparation method thereof. Background technique [0002] Metal corrosion will not only cause huge losses, but also damage the protection of the environment. At present, coating anti-corrosion is the most widely used, most economical and practical anti-corrosion method. Solvent-based anti-corrosion coatings are usually selected for metal substrates or the surface of some large-scale steel frame structures. However, a large amount of organic solvents will volatilize during the construction process of solvent-based coatings, which seriously pollutes the environment; the environmentally friendly coatings currently on the market are powder-based Coatings, solvent-free coatings and water-soluble coatings. Among them, water-soluble coatings not only save a lot of raw materials because their solvents are replaced by water, but also greatly reduce envir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/08C09D7/62
CPCC08K9/06C08K2003/2241C08K2201/011C09D5/08C09D7/62C09D175/04
Inventor 谭贺洵申国辉陆卫尧
Owner 广东鑫皇冠新材料有限公司
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