Nano silicon dioxide (SiO2) improved fluorocarbon coating and preparation thereof

A fluorocarbon coating, nanotechnology, applied in the coating and other directions, can solve the problems of shortening the time of coating preparation, etc., achieve the effects of improved anti-ultraviolet aging performance and corrosion resistance, simple process and low cost

Inactive Publication Date: 2013-06-05
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After searching the literature of the prior art, it was found that Lu Xiang of Nanjing University of Aeronautics and Astronautics et al. 2 Research on Modified Aeronautical Fluorocarbon Coatings mentioned that nano-SiO 2 After the fluorocarbon resin is dispersed in the mixed solvent, it needs to be dispersed at high speed for 2 hours and ultrasonically dispersed for 1 hour. In this patent, after adding the fluorocarbon resin, it only needs to be stirred evenly, which greatly shortens the preparation time of the coating. The drying time saved in actual production application is considerable; Lu Xiang added nano-SiO 2 To improve the anti-aging performance of fluorocarbon coatings, Ma Lizhi et al. improved the thermal stability of the coating by adding silicon dioxide in "Application Research of Fluorocarbon Coatings in the Sealing of Iron Cultural Relics", but so far there are few studies on SiO 2 Research reports on the corrosion resistance of nanocomposite fluorocarbon coatings, as well as comprehensive reports on the properties of stain resistance, UV aging resistance, and corrosion resistance. The addition of fumed silica (brand A200) in this technology can effectively improve the stability of fillers. , improve the dispersibility of fillers, prevent settling, prevent sagging, and improve the adhesion of the paint film. Dry outside, so that the paint film is not easy to crack

Method used

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  • Nano silicon dioxide (SiO2) improved fluorocarbon coating and preparation thereof
  • Nano silicon dioxide (SiO2) improved fluorocarbon coating and preparation thereof
  • Nano silicon dioxide (SiO2) improved fluorocarbon coating and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Coating Formulation:

[0029] nano-SiO 2 1%;

[0030] Acrylic resin with 40% solid content (brand B-44) 27%;

[0031] Polyvinylidene fluoride resin (PVDF) 26.7%;

[0032] Fumed silica (brand A200) 0.4%;

[0033] Aluminum silver paste 6%;

[0034] Cellulose acetate (brand CAB551) 4%;

[0035] Dispersant (brand TAZ-ND1) 2%;

[0036] Mixed solvent balance.

[0037] A. Dissolve 2% dispersant in mixed solvent, then add 1% surface-modified nano-SiO 2 , dispersed in a disperser at 2000r / min for 1h;

[0038] B. Add 27% acrylic resin (40% solid content), PVDF 26.7%, A200 0.4%, aluminum silver paste 6% and CAB551 4% to the dispersed solution in A, mix well to get SiO 2 Nano-composite fluorocarbon coating.

[0039] The coating obtained in this example was sprayed on the pretreated steel surface in a dry environment at room temperature, and the thickness of the coating film was 35±5 μm.

Embodiment 2

[0041] Coating Formulation:

[0042] nano-SiO 2 2%;

[0043] Acrylic resin with 40% solid content (brand B-44) 26.5%;

[0044] Polyvinylidene fluoride resin (PVDF) 26%;

[0045] Fumed silica (brand A200) 0.4%;

[0046]Aluminum silver paste 6%;

[0047] Cellulose acetate (brand CAB551) 4%;

[0048] Dispersant (brand TAZ-ND1) 3%;

[0049] Mixed solvent balance.

[0050] A. Dissolve 3% dispersant in mixed solvent, then add 2% surface-modified nano-SiO 2 , dispersed in a disperser at 2500r / min for 1h;

[0051] B. Add 26.5% acrylic resin (40% solid content), PVDF 26%, A200 0.4%, aluminum silver paste 6% and CAB551 4% to the dispersed solution in A, mix well to get SiO 2 Nano-composite fluorocarbon coating.

[0052] The coating obtained in this example was sprayed on the pretreated steel surface in a dry environment at room temperature, and the thickness of the coating film was 35±5 μm.

Embodiment 3

[0054] Coating Formulation:

[0055] nano-SiO 2 3%;

[0056] Acrylic resin with 40% solid content (brand B-44) 26.2%;

[0057] Polyvinylidene fluoride resin (PVDF) 25.6%;

[0058] Fumed silica (brand A200) 0.4%;

[0059] Aluminum silver paste 6%;

[0060] Cellulose acetate (brand CAB551) 4%;

[0061] Dispersant (brand TAZ-ND1) 4%;

[0062] Mixed solvent balance.

[0063] A. Dissolve 4% of the dispersant in the mixed solvent, and then add 3% of the surface-modified nano-SiO 2 , dispersed in a disperser at 3000r / min for 1h;

[0064] B. Add acrylic resin (40% solid content) 26.2%, PVDF 25.6%, A200 0.4%, aluminum silver paste 6% and CAB551 4% to the dispersed solution in A, mix well to get SiO 2 Nano-composite fluorocarbon coating.

[0065] The coating obtained in this example was sprayed on the pretreated steel surface in a dry environment at room temperature, and the thickness of the coating film was 35±5 μm.

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Abstract

The invention relates to a preparation method of nano silicon dioxide (SiO2) improved fluorocarbon coating. The preparation method of the nano SiO2 improved fluorocarbon coating is characterized in that the nano SiO2 improved fluorocarbon coating comprises the following components, by mass, 1% to 5% of nano SiO2, 40% of acrylic resin with solid contents, 25% to 28% of polyvinylidene difluoride, 24% to 27% of fumed SiO2, 0.4% of silver paste, 6% of cellulose acetate, 4% of dispersing agent, 2% to 5% of mixed solvent, and allowance. nano SiO2 is added into the fluorocarbon coating, thus improving contamination corrosion resistance, ultraviolet aging resistance, corrosion resistance and the like of the fluorocarbon coating, and the preparation method of the nano SiO2 improved fluorocarbon coating belongs to the technical field of processing of coatings.

Description

technical field [0001] The present invention relates to a SiO 2 The preparation method of nano-composite fluorocarbon coating, mainly is to use nano-SiO 2 The method is added to fluorocarbon coatings to improve the stain resistance, ultraviolet aging resistance, corrosion resistance, etc. of the fluorocarbon coatings, and belongs to the technical field of coating processing. Background technique [0002] Fluorocarbon coatings have high chemical corrosion resistance, heat resistance, weather resistance and durability, and are inactive to many acids and bases and solvents, so they are widely used in various regions and fields; nano-SiO 2 It is an amorphous white powder. It is an odorless, non-toxic and non-polluting inorganic non-metallic material. It has high activity and can produce many special properties such as optical shielding. It is used in rubber modification, ceramics, engineering, etc. There have been many reports on the application of plastics, biomedicine, build...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/16C09D133/00C09D101/12C09D7/12
Inventor 宋仁国李鑫伟王超姜冬
Owner CHANGZHOU UNIV
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