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Hydrophobic coating material and method for manufacturing the same

A technology for antifouling paint, manufacturing method, applied in the direction of antifouling/underwater paint, coating, paint containing biocide, etc., can solve the problem of incompatibility, poor weather resistance and hardness of polyurethane, difficult to maintain hydrophobicity Properties and other issues, to achieve the effect of increasing application, good coating, and reducing VOC value

Active Publication Date: 2013-04-17
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some studies have used waterborne resins (waterborne resin), such as waterborne polyurethane (waterborne polyurethane; waterborne PU), so that the sol-gel reaction can be carried out in the water phase, but the reaction process is usually still A small amount of organic solvent is required to maintain the stability of the reaction, but the resulting product is usually difficult to maintain good hydrophobic properties, so it cannot be used as a good hydrophobic antifouling coating
In addition, polyurethane has poor weather-proof and hardness, so it is not suitable for outdoor applications.
Moreover, due to the high molecular weight of polyurethane, when it is added to other systems, there are often incompatibility problems, so its application is limited

Method used

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  • Hydrophobic coating material and method for manufacturing the same
  • Hydrophobic coating material and method for manufacturing the same
  • Hydrophobic coating material and method for manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8

[0034] [Example 1-8] Formation of hydrophobic and antifouling materials

[0035] 0.8 g of tetraethyl orthosilicate (TEOS), 0.277 g of water, and 0.32 g of 0.1N HCl were mixed and reacted at room temperature for 3 hours to obtain a solution containing microparticles. Then, 0.8 g of 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane (F-8261, Degussa) was added and reacted at room temperature for 2 hours to modify the microparticles. Finally, 0.0384g of anionic surfactant sodium dodecylsulfonate (Sodium dodecyl (ester) sulfate; SDS) was dissolved in 24.94 grams of water, then added to the modified solution, and reacted at room temperature 12 hours to obtain a stable hydrophobic antifouling coating in the aqueous phase. Then, the above-mentioned hydrophobic antifouling coating was coated on the glass substrate, and baked at 120° C. for 30 minutes and then cooled. The water contact angle was measured to be 116°.

[0036] Other examples and comparative examples are shown in Table 1, whe...

Embodiment 9

[0044] [Example 9] The volatile organic compound (VOC) value of the hydrophobic antifouling coating film

[0045] The volatile organic compound (VOC) values ​​of Example 1 and Comparative Example 1 were measured, and the results are shown in Table 2 below. Among them, the calculation method of VOC is ISO 11890-2 (10.3Method 2).

[0046] Table 2

[0047]

[0048] Referring to Table 2, compared with the hydrophobic antifouling coating film of Comparative Example 1, no organic solvent is used in the manufacturing process of the hydrophobic antifouling coating film formed in Example 1 of the present invention, so the requirement of low VOC value can be achieved, and This VOC comes from the by-product (ethanol) produced by the sol-gel reaction of TEOS. The coating prepared by this synthesis method is an environmentally friendly hydrophobic coating.

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Abstract

A method of manufacturing a hydrophobic coating material, including: (a) mixing a siloxane precursor, water, and a catalyst to proceed with a sol-gel reaction to form a solution having particles therein, wherein the sol-gel reaction is performed without using any organic solvent; (b) chemically modifying the particles with a hydrophobic agent to form surface-modified particles; and (c) adding a surfactant to the solution containing the surface-modified particles to form a hydrophobic coating material. A hydrophobic coating material and a hydrophobic coating formed by the hydrophobic coating material are also provided. The hydrophobic coating material may preferably have a low VOC (Volatile organic compound) value, and may disperse in a water phase solution.

Description

technical field [0001] The present invention relates to antifouling paint, and in particular to a hydrophobic antifouling paint and a manufacturing method thereof. Background technique [0002] Generally speaking, after a long period of use, the surface of various substrates is easy to form dirt, which is even more difficult to remove, or requires the use of strong corrosive cleaning agents for cleaning, which is likely to cause environmental and human damage. s damage. Therefore, various antifouling and easy-to-clean coatings are gradually being developed. By utilizing their own hydrophobic / oleophobic properties, the surface of the substrate is less likely to be dirty, and the substrate can still maintain a clean appearance. [0003] However, in the manufacturing process of commonly used antifouling coatings, for example, in the process of using sol-gel reaction, a large amount of organic solvents (such as alcohols, toluene, tetrahydrofuran (THF), etc.) must be used. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D7/12C09D5/16
CPCC09D5/1675
Inventor 苏一哲游雅婷黄云珊汤伟钲沈永清
Owner IND TECH RES INST
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