Hydrophobic and oleophobic coating composition and preparation method thereof

Abstract

The invention relates to the technical field of hydrophobic and oleophobic coatings, and particularly discloses a hydrophobic and oleophobic coating composition and a preparation method thereof. The hydrophobic and oleophobic coating composition comprises the following components in parts by weight: 10-25 parts of methyl hydrogen-containing silicone oil; 5-15 parts by weight of hydroxyl-terminatedsilicone oil; 2-8 parts by weight of amino silicone oil; 0.1 to 2 parts by weight of perfluorosilicone oil; 3-10 parts by weight of organic solvent type silica sol; and 40-80 parts by weight of organic solvent. According to the invention, methyl hydrogen-containing silicone oil, hydroxyl-terminated polydimethylsiloxane and amino silicone oil undergo a condensation reaction to form a three-dimensional network structure, and perfluorosilicone oil is combined to further improve the oleophobic effect of the system; and by adding the solvent type silica sol, inorganic silicon oxide particles in the silica sol and organopolysiloxane are hybridized, and a uniform system is formed, so that the formed coating has excellent hydrophobic and oleophobic effects and good wear resistance, the product islow in production cost, long in shelf life, simple in preparation method and suitable for industrial production, and industrial production and wide application are facilitated.

Description

technical field [0001] The invention relates to the technical field of hydrophobic and oleophobic coatings, in particular to a hydrophobic and oleophobic coating composition and a preparation method thereof. Background technique [0002] The surfaces of many creatures in nature, such as lotus leaves and cicada wings, have hydrophobic and oleophobic effects. The hydrophobic and oleophobic effects are the same as water droplets falling on lotus leaves, because the surface of lotus leaves has a natural air interlayer at the nanometer level. There is also little friction on the lotus leaf, so it will not stay on the surface of the lotus leaf. [0003] The hydrophobic and oleophobic layer makes the surface friction smaller and smoother, and rainwater, oil stains, etc. are difficult to adhere to the surface and are easy to clean. Therefore, it is used in automobiles, building and aircraft windshields, satellite antennas, high-voltage wires, and even locomotives and aircrafts. It ...

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Problems solved by technology

This method also has the problem of insufficient bonding strength or poor wear resistance.

[0006] In the Chinese patent application with the application number CN01110291.8, a chemical vapor deposition method is proposed to prepare an array structure film with super-amphiphobic properties, but the process is relatively harsh and it is not easy for industrial production and application

[0007] Chinese invention patent CN201310345228.X discloses a stable and transparent superhydrophobic or superamphiphobic coating and its preparation method and application. The preparation steps of the coating are as follows: blending nanoparticles, epoxy resin and solvent to obtain epoxy resin Hybridization solution: Dissolving fluorine-containing substances and catalysts in a solvent to prepare a fluorine-containing solution; spraying the epoxy resin hybridization solution on the surface of the substrate, and then drying the substrate at a temperature of 80-130°C for 0.5- After 5 hours, spray the above-mentioned fluorine-containing solution on the surface of the substrate. After the solvent evaporates to dryness, dry the above-mentioned substrate at a temperature of 80-130°C for 0.5-5 hours, and finally rinse the surface of the substrate with a solvent to prepare To obtain superhydrophobic or superamphiphobic coatings, this method relies on the use of a large amount of fluorine-containing substances, resulting in high production costs and cumbersome production processes

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