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Fluorocarbon self-cleaning coating and preparation method thereof

A self-cleaning, fluorocarbon technology, applied in the direction of coating, etc., can solve the problems of affecting the appearance, reducing the product storage period, powdering and falling off of the coating, etc., achieving long-term stable self-cleaning, simplifying the coating process, and low water contact angle Effect

Active Publication Date: 2016-04-13
NIPPON PAINT IND COATINGS SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the literature titled "Self-cleaning anti-corrosion coating topcoat and its preparation method", Wen Yongxiang et al. used the sharp titanium dioxide organosiloxane mixture produced by the hydrolysis of nano-sharp titanium dioxide in tetraethyl orthosilicate (TEOS), The surface of the coating produces a super-hydrophilic surface through light, but it is better than anatase titanium dioxide, which has the characteristics of decomposing organic matter by light. beautiful
[0004] Li Jie and others disclosed a self-cleaning fluorocarbon coating in the Chinese patent application "Self-cleaning PTFE FEVE coating and preparation method". In this patent, MKCSILICATEMS58B15 of Mitsubishi Chemical is used to achieve the effect of self-cleaning. If this additive is used alone , the initial water contact angle is 60-70, the self-cleaning effect is not ideal, and it is easy to absorb moisture and fail during the storage of the paint, thus reducing the storage period of the product

Method used

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  • Fluorocarbon self-cleaning coating and preparation method thereof
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  • Fluorocarbon self-cleaning coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047]Add 25g n-butanol and 72.5g methyl alcohol in a four-necked flask equipped with stirring paddle, thermometer, condenser tube and nitrogen (the whole reaction process is carried out under nitrogen protection) inlet pipe and add in the reaction vessel and stir at a constant speed, and the water bath is heated to 40- 50°C, put 50g of hydroxysiloxane and 100g of methyltrimethoxysilane into the reaction vessel at 40°C to 50°C, stir for 30 to 40 minutes, then drop 4.5g of vinyltrimethoxysilane and 1g of dilaurel After the addition of the dibutyltin acid mixture was completed, the temperature was raised to 80° C. with stirring, and the reaction was carried out at a constant temperature for 6 hours. The temperature was lowered to room temperature and the material was discharged to obtain a methoxy-terminated polysiloxane with a degree of polymerization of 4.

[0048] Add 32g fluorocarbon resin, 6g acrylic resin, 30g rutile titanium dioxide, 1g polydimethylsiloxane, 2g fatty acid ...

Embodiment 2

[0054] Add 75% solvent of 100g butyl acetate and 30g methanol total amount in a four-necked flask equipped with a stirring paddle, a thermometer, a condenser tube and a nitrogen inlet pipe and add it to the reaction vessel to stir at a constant speed, and the water bath is heated to 40-50°C. Put 50g of hydroxysiloxane and 119g of methyltriethoxysilane into the reaction vessel at 40°C to 50°C, stir for 30 to 40 minutes, then add 4.1g of vinyltrimethoxysilane and 1.3g of dilauric acid dropwise The mixture of dibutyltin, after the dropwise addition is completed, stir and heat up to 80°C, react at a constant temperature for 6h, cool down to room temperature and discharge, and prepare ethoxy-terminated polysiloxane with a degree of polymerization of 4. The entire reaction process is carried out under nitrogen protection. .

[0055] Add 32g of fluorocarbon resin, 10g of acrylic resin, 15g of rutile titanium dioxide, 17g of iron oxide red, 1g of polydimethylsiloxane, 2g of fatty acid...

Embodiment 3

[0058] Add 75% solvent of 80g butyl acetate and 30g xylene to a four-neck flask equipped with stirring paddle, thermometer, condenser tube and nitrogen gas inlet tube, add to the reaction vessel and stir at a constant speed, and the water bath is heated to 40-50°C , put 38g of hydroxysiloxane and 70g of methyltriethoxysilane into the reaction vessel at 40℃~50℃, stir for 1h, then add dropwise 32g of methyltributoxysilane and 0.7g of dibutyltin diacetate After the dropwise addition, the mixture was stirred and heated to 80°C, reacted at a constant temperature for 5 hours, cooled to room temperature and discharged to prepare an ethoxybutoxy-terminated polysiloxane with a degree of polymerization of 12. The entire reaction process was carried out under nitrogen protection. .

[0059] Add 34g fluorocarbon resin, 9g acrylic resin, 27g rutile titanium dioxide, 1g polydimethylsiloxane, 2g fatty acid polyethylene glycol ester, 2g polytetrafluoroethylene, 25g isophorone and the remainin...

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Abstract

The invention discloses a fluorocarbon self-cleaning coating comprising the following raw materials, by weight: 28-35 parts of fluorocarbon resin, 4-10 parts of acrylic resin, 0.5-5.0 parts of amino resin, 0.1-0.5 parts of a catalyst, 2-8 parts of alkoxy-modified silicone resin, 25-35 parts of a pigment filler, 0.1-1.0 parts of a defoaming agent, 0.5-2.5 parts of a dispersing agent, 1.0-4.0 parts of a matting agent, and 20-30 parts of a solvent. According to the fluorocarbon self-cleaning coating provided by the invention, while the service life of the fluorocarbon coating is ensured, the coating has the characteristics of low water contact angle and carbon black contamination resistance. The invention also discloses a preparation method of the fluorocarbon self-cleaning coating. The preparation process is simple, and can be easily industrialized.

Description

technical field [0001] The invention relates to the technical field of surface functional coatings. More specifically, it relates to a fluorocarbon self-cleaning coating and a preparation method thereof. Background technique [0002] Fluorocarbon coatings use fluorine-containing resin as the film-forming substance. Because the resin contains F-C bonds, it has good wear resistance, corrosion resistance, heat resistance, and weather resistance. It is widely used in chemical industry, construction, electronics, machinery, Automobile and other industries, and fluorocarbon self-cleaning coating has the function of surface self-cleaning to further open up the application field of fluorocarbon coating. The surface energy of fluorocarbon coating is very low, showing hydrophobic and lipophilic characteristics, and it is easy to absorb pollutants in the atmosphere after coating. Smoke, fuel oil or acidic substances, due to their own hydrophobicity, even rainwater is difficult to infi...

Claims

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Application Information

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IPC IPC(8): C09D127/16C09D133/00C09D183/06C08G77/18
Inventor 永川隆博唐铭徽
Owner NIPPON PAINT IND COATINGS SHANGHAI
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