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Method of manufacturing hydrophobic antifouling coating material and method of forming hydrophobic antifouling coating film

An antifouling paint, a technology for a manufacturing method, applied in the formation of a hydrophobic antifouling coating film, and the manufacturing field of a hydrophobic antifouling paint, can solve the problems of incompatibility, inability to be used as a good hydrophobic antifouling paint, difficult to maintain good hydrophobic properties, and the like, To achieve the effect of reducing VOC value

Active Publication Date: 2015-07-01
IND TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some studies have used waterborne resin (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 usually still need to use a small amount of organic resin in the reaction process. solvent to maintain reaction stability, 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, it often has incompatibility problems, so its application is limited

Method used

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  • Method of manufacturing hydrophobic antifouling coating material and method of forming hydrophobic antifouling coating film
  • Method of manufacturing hydrophobic antifouling coating material and method of forming hydrophobic antifouling coating film
  • Method of manufacturing hydrophobic antifouling coating material and method of forming hydrophobic antifouling coating film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] With 0.4 gram of tetraethoxysilane (Tetraethyl orthosilicate; TEOS), 0.277 gram of water, 0.4 g of aqueous colloidal silica suspension (purchased from Aldrich TMA colloidal silica suspension) 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 grams of hydrophobic agent 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane (1H, 1H, 2H, 2H-Perfluorodecyltriethoxysilane, F-8261 available from Degussa) was added to the above-mentioned microparticle-containing solution, React at room temperature for 2 hours to modify the microparticles. Finally, the anionic surfactant sodium dodecylsulfonate (Sodium dodecyl (ester) sulfate; SDS) of 0.0384g was dissolved in 24.94 grams of water, and then it was added to the solution of modified particles, and reacted at room temperature for 12 Hours, a stable hydrophobic antifouling coating in the aqueous phase is obtained. The appearance of the above-mentioned hydr...

Embodiment 2

[0033] Similar to Example 1, the difference is that the amount of aqueous colloidal silica suspension used in the step of forming microparticles was increased to 0.8 g. The appearance of the hydrophobic antifouling paint of this embodiment is also uniformly dispersed, and it has not gelled after being placed at 60° C. for 14 days. The solid content of the above-mentioned hydrophobic antifouling coating is 3.43%, and VOC≥300g / L (VOC calculation method is ISO11890-2 (10.3Method2). Finally, the above-mentioned hydrophobic antifouling coating is coated on the glass substrate, and in After baking at 120°C for 30 minutes and then cooling, the water contact angle was measured to be 112°. In addition, the hydrophobic antifouling coating after 14 days at 60°C was coated on a glass substrate and baked at 120°C After baking for 30 minutes and then cooling, the water contact angle was measured to be 113°. As can be seen from the above, the addition of aqueous colloidal silica suspension i...

Embodiment 3

[0035] Similar to Example 1, the difference is that the amount of aqueous colloidal silica suspension used in the step of forming microparticles was increased to 1.6 g. The appearance of the hydrophobic antifouling paint of this embodiment is also uniformly dispersed, and it has not gelled after being placed at 60° C. for 14 days. The solid content of above-mentioned hydrophobic antifouling paint is 3.47%, and VOC ≥ 300g / L (the calculation method of VOC is ISO11890-2 (10.3Method2). Finally, above-mentioned hydrophobic antifouling paint is coated on the glass substrate, and in After baking at 120°C for 30 minutes and then cooling, the water contact angle was measured to be 101°. In addition, the hydrophobic antifouling coating after 14 days at 60°C was coated on a glass substrate and baked at 120°C After baking for 30 minutes and then cooling, the water contact angle was measured to be 111°. As can be seen from the above, the addition of aqueous colloidal silica suspension in t...

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Abstract

A method of manufacturing a hydrophobic antifouling coating material, including: (a) mixing a sol-gel precursor, water, an aqueous colloidal silica suspension, and a catalyst to perform a sol-gel reaction to form a solution having particles therein, wherein the sol-gel reaction is performed without addition of 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 antifouling coating material. The hydrophobic antifouling coating material can be dispersed in an aqueous solution, and has properties such as low VOC (Volatile organic compound) value, high solid content, and high stability.

Description

technical field [0001] The present invention relates to coatings, and in particular to a method for producing a hydrophobic antifouling coating and a method for forming a hydrophobic antifouling coating. 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 anti-fouling and easy-clean coatings are gradually being developed, which can make the surface of the substrate less prone to dirt, and can still maintain a clean appearance of the substrate. [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 paint ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/16C09D1/00C09D183/04
CPCC09D5/1625C09D5/1687C09D5/1675C08G77/24C09D183/08
Inventor 苏一哲汤伟钲沈永清黄云珊唐明仁薛辰晨
Owner IND TECH RES INST
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