Nanometer fluorocarbon modified coating with titania, its production and process

A technology of nano-titanium dioxide and modified fluorocarbon, applied in the direction of coating, etc., can solve the problems of poor stain resistance and scrub resistance, unsuitable for aluminum alloy profiles and plate surface coating, etc., to achieve easy control and good self-cleaning Performance, the effect of fewer steps

Inactive Publication Date: 2009-10-28
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing fluorocarbon coating itself has strong photooxidation resistance, but its self-cleaning performance, stain resistance and scrub resistance are poor, so it is not suitable for surface coating of aluminum alloy profiles and plates for doors, windows and curtain walls

Method used

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  • Nanometer fluorocarbon modified coating with titania, its production and process
  • Nanometer fluorocarbon modified coating with titania, its production and process

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1 Nano-titanium dioxide modified fluorocarbon coating and its preparation example ①

[0022] The ratio of modified fluorocarbon coating in this example, anatase nano-TiO 2 and rutile nano-TiO 2 Mixture (the weight mixing ratio of the two is 4:1): fluorocarbon coating = 2:100. The anatase nano-TiO 2 and rutile nano-TiO 2 The mixture is available on the market.

[0023] The preparation method is as follows: (1) oleic acid coated anatase nano-TiO 2 and rutile nano-TiO 2 Preparation of the mixture Take 4g (2% of fluorocarbon coating) nano anatase TiO 2 and rutile TiO2 Pour the mixture powder into 50ml of deionized water, then add about 2ml of perchloric acid dropwise, and stir to make the water and powder mix evenly, adjust its pH value to 4, and then ultrasonically vibrate for 30 minutes; At the same time, add 3ml of oleic acid to the mixture first, then slowly add ammonia water dropwise, and at the same time stir rapidly to adjust the pH of the suspensio...

Embodiment 2

[0045] Embodiment 2 Nano-titanium dioxide modified fluorocarbon coating and its preparation example ②

[0046] The ratio of modified fluorocarbon coating in this example, anatase nano-TiO 2 and rutile nano-TiO 2 Mixture (the ratio of the two is 4:1): fluorocarbon coating = 3:100.

[0047] The preparation method is as follows: (1) oleic acid coated anatase nano-TiO 2 and rutile nano-TiO 2 Preparation of mixture to obtain anatase nano-TiO 2 and rutile nano-TiO 2 Pour 6g of the mixture powder into about 75ml of deionized water, then add 3ml of perchloric acid dropwise, and stir to mix the water and powder evenly, adjust the pH value to 4, and then ultrasonically vibrate for 35 minutes; Add 6ml of oleic acid to the mixture, then slowly add ammonia water dropwise, and at the same time stir rapidly to adjust the pH of the suspension to 8.5; heat the suspension to >90°C to slowly evaporate the water to obtain nano Titanium dioxide powder; (2) mixing the prepared oleic acid-coat...

Embodiment 3

[0049] Example 3 Example of pretreatment process of aluminum alloy plate

[0050] (1) Use a grinder for mechanical polishing to remove burrs, scale, adhered release agent, various oil stains, reduce surface roughness, and wash to remove slag; (2) Degreasing ①Ultrasonic degreasing solvent: acetone , temperature: room temperature, soaking time: 10min; ②Solvent used for solvent degreasing: trichlorethylene solvent, temperature: 60°C, soaking time: 8min; ③Used solution for alkaline cleaning and degreasing: containing sodium phosphate 20g dm -3 , sodium bicarbonate 20g·dm -3 , nonionic surfactant 8ml·L -1 , temperature: 60°C, soaking time: 3min; (3) Rust removal and oxidation film removal: the first pickling: use a solution containing 7.5% (volume ratio) of sulfuric acid, corrosion inhibitor urotropine (hexamethylene Tetramine) 0.5g·dm -3 , temperature: 40°C, soaking time: 3min; second pickling: use a solution containing 8% (volume ratio) nitric acid, temperature: 20°C, soaking ...

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Abstract

The invention discloses a nano-titanium dioxide modified fluorocarbon coating and its preparation process and application. The coating is a mixture of anatase-type nano-TiO2 and rutile-type nano-TiO2 added to the existing fluorocarbon coating, and the addition ratio is: sharp Titanite nano-TiO2 and rutile-type nano-TiO2 mixture: the weight ratio of fluorocarbon coating is 1-4: 100; In the described anatase-type nano-TiO2 and rutile-type nano-TiO2 mixture, anatase-type nano-TiO2 and rutile-type The weight ratio of nanometer TiO2 is 4:1. The invention also includes the preparation process of the modified fluorocarbon paint and the pretreatment process for coating the aluminum alloy plate. The aluminum alloy profiles and plates coated with the fluorocarbon paint of the present invention have good self-cleaning performance, stain resistance and scrub resistance, good weather resistance, chemical corrosion resistance, waterproof and moisture-proof, light weight, shockproof, and insulation Sound, heat insulation, uniform color, no cracking, no deformation, no peeling, no fading and so on.

Description

technical field [0001] The invention relates to a fluorocarbon coating and its preparation process and application, in particular to a nano-titanium dioxide modified fluorocarbon coating and its preparation process and application. Background technique [0002] Aluminum alloy profiles and plates have special properties that other door, window and curtain wall materials do not have. They not only have high strength (some aluminum alloys can reach the strength of No. 45 steel), but also light weight (1 / 3 of steel), good plasticity, and Extruded into various complex profiles without any pollution, waste aluminum alloy profiles can be recycled, remelted and reused. Over the years, aluminum alloy profiles and plates have been used internationally as door, window and curtain wall materials. In the past two decades, doors, windows and curtain walls made of various materials have emerged to challenge it. For example, glass curtain walls used to be a fashion in the construction indu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/00C09D127/12
Inventor 余刚胡波年杨景花
Owner HUNAN UNIV
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