Method for converting traditional paint into superhydrophobic paint

A super-hydrophobic coating and super-hydrophobic technology, applied in anti-corrosion coatings, conductive coatings, epoxy resin coatings, etc., can solve problems such as easy pollution, coating anti-fouling, waterproof, anti-static, anti-corrosion and anti-icing performance degradation and other problems , to achieve the effect of wide application prospects

Inactive Publication Date: 2019-05-21
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional coatings such as epoxy coatings, polyurethane coatings, fluorocarbon coatings, silicone coatings, polyurea coatings, polyester coatings, alkyd coatings, acrylic coatings, chlorinated rubber coatings, styrene coatings, phenolic resin coatings, etc., traditional coatings have Excellent film-forming properties, stability and weather resistance, however, most of the traditional coatings are prone to pollution, resulting in significant decline in anti-fouling, waterproof, anti-static, anti-corrosion and anti-icing properties of coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 50g of super-hydrophobic modified silica particles with a diameter of 15nm to 500ml of xylene solution, stir for 10 minutes, and ultrasonically disperse for 30 minutes to make it uniformly dispersed; then add 600g of epoxy anti-corrosion coating and 50g of complete Fluoroacrylate copolymer was stirred at room temperature at 1500 rpm for 10 minutes, then ultrasonically dispersed for 15 minutes to obtain a superhydrophobic modified coating; finally, the obtained superhydrophobic modified coating was sprayed on the surface of the steel plate substrate to obtain Superhydrophobic coating.

[0015] The surface wettability of the coating was measured with a 10 µL water drop. The test results showed that the contact angle was 155° and the rolling angle was 5°. Coating corrosion current by 2.5×10 -8 A / cm 2 down to 2.1×10 -11 A / cm 2 , the impedance value can be changed from 1.2×10 5 Ω·cm 2 Boost to 5.3×10 8 Ω•cm 2 , the neutral salt spray resistance of the coating is ...

Embodiment 2

[0017] Add 100g of polytetrafluoroethylene (PTFE) particles with a diameter of 3um to 150ml of petroleum ether solution, stir for 15 minutes, and ultrasonically disperse for 15 minutes to make them uniformly dispersed; then add 400g of polyurethane anti-corrosion coating and 30g of polydimethylformaldehyde to the above dispersion base siloxane, stirred at 2000 rpm at room temperature for 15 minutes, then ultrasonically dispersed for 10 minutes to obtain a superhydrophobic modified coating, and finally sprayed the obtained superhydrophobic modified coating on the surface of the magnesium alloy substrate to obtain Superhydrophobic coating.

[0018] The surface wettability of the coating was measured with a 10 µL water drop. The test results showed that the contact angle was 153° and the rolling angle was 6°. Coating corrosion current by 1.7×10 -7 A / cm 2 down to 1.2×10 -9 A / cm 2 , the impedance value can be changed from 1.6×10 5 Ω·cm 2 up to 2.2×10 7 Ω•cm 2 , the neutral ...

Embodiment 3

[0020] Disperse 500g of attapulgite particles in ethanol, add 20g of methyltrimethoxysilane and 40ml of ammonia water and react for 2 hours to obtain a suspension of superhydrophobic modified micro-nano particles; the suspension is filtered, dried, and ground Finally, superhydrophobic modified attapulgite nanoparticles were obtained.

[0021] Add 100g of superhydrophobic modified attapulgite particles into 100ml of xylene solution, stir for 20 minutes, ultrasonically disperse for 20 minutes to make it uniformly dispersed; then add 400g of self-cleaning antifouling paint and 10g of perfluorooctane to the above dispersion Trimethoxysilane, stirred at room temperature at 3000 rpm for 10 minutes, then ultrasonically dispersed for 10 minutes to obtain a super-hydrophobic modified coating, and finally dip-coat the obtained super-hydrophobic modified coating on the surface of the glass substrate. A superhydrophobic coating is obtained.

[0022] The surface wettability of the coating...

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Abstract

The invention discloses a method for converting a traditional paint into a superhydrophobic paint, comprising the following steps: ultrasonically dispersing superhydrophobic particles in a solvent, and then sequentially adding a traditional paint and a low surface energy substance to a dispersion, and performing high-speed stirring and ultrasonic dispersion at room temperature so as to obtain thesuperhydrophobic paint. Excellent film forming property, stability and weather resistance of the traditional paint are utilized, the micro-nano structure and the specific surface energy are provided by the hydrophobic particles and the low surface energy substance to the surface, and then conversion of the traditional paint to the superhydrophobic paint is realized. the coating of the paint has excellent super-hydrophobic performance (water contact angle 150 degrees, and roll angle 10 degrees), shows excellent anti-fouling, waterproof, anti-static, anti-corrosion and anti-icing properties, andhas s broad application prospect.

Description

technical field [0001] The invention relates to a method for preparing a superhydrophobic coating, in particular to a method for converting a traditional coating into a superhydrophobic coating, and belongs to the technical field of functional coatings. Background technique [0002] Coatings have excellent protective, decorative and special functional effects and are widely used in modern industry, energy, marine and other fields. Traditional coatings such as epoxy coatings, polyurethane coatings, fluorocarbon coatings, silicone coatings, polyurea coatings, polyester coatings, alkyd coatings, acrylic coatings, chlorinated rubber coatings, styrene coatings, phenolic resin coatings, etc., traditional coatings have Excellent film-forming properties, stability and weather resistance. However, most of the traditional coatings are prone to pollution, resulting in significant decline in anti-fouling, waterproof, anti-static, anti-corrosion and anti-icing properties of coatings. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D175/04C09D5/16C09D5/24C09D5/08C09D7/65
Inventor 张俊平李步成李凌霄杨燕飞
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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