Ultra-discharging water-soluble fluor-silicon-acrylic coatings with nano particles

Abstract

The invention discloses a super-hydrophobic water fluorine silicone / acrylic paint containing nanoparticles. The paint is prepared by mixing the compositions by weight percentage: 30 to 65 percent of water, 10 to 40 percent of silicone-acrylate emulsion, 10 to 40 percent of water fluoro-polymer emulsion, 1 to 10 percent of nano-meter oxid particles, 1 to 15 percent of inorganic hole compound and asmall quantity of inorganic acid used for adjusting the pH value. The invention also discloses a super-hydrophobic water fluorine silicone / acrylic coating prepared by the paint. The water static wrapping angle of the coating is more than 150 degrees and a rolling angle is lower than 5 degrees. The coating prepared by the paint has the advantages of super-hydrophobicity, excellent mechanical property and easy process, etc. and has the self-cleaning function similar to a lotus leaf.

Description

technical field

[0001] The invention relates to a coating composition, in particular to a water-based fluorosilicone-acrylic coating containing nanoparticles. Background technique

[0002] With the continuous development of my country's economy, the building and its supporting decoration industry have simultaneously entered an era of unprecedented rapid development. Chinese people regard architecture as a century-old project and require durable exterior wall decoration. They generally emphasize the importance of weather resistance and durability of exterior wall coatings. In fact, as a decorative coating for exterior walls, stain resistance and weather resistance are two aspects of a problem, which are equally important. If the coating has good weather resistance but poor stain resistance, even if the coating does not fall off for a hundred years, the building will soon become dirty and obsolete, which cannot reflect the decorative effect of the paint on the building; simil...

Examples

Embodiment 1

[0036] Mix 15g deionized water, 10g silicon acrylic emulsion (solid content 35%), 7g polytetrafluoroethylene emulsion (solid content 55%), 3g nano silicon dioxide aqueous dispersion (diameter 5nm, solid content 15%) under stirring and 2g of ammonium bicarbonate, adjust the pH of the mixture to 8-10 with concentrated hydrochloric acid, and stir evenly to obtain a superhydrophobic water-based fluorosilicone-acrylic coating containing nanoparticles.

[0037] Thoroughly stir the coating prepared above, apply the coating evenly on the glass surface with a wet film preparation device with a thickness of 90 microns, and dry it at 80° C. for 15 minutes. The resulting white coating is a superhydrophobic water-based fluorosilicone coating (see figure 1 with figure 2 ). from figure 1 with figure 2 We can see that the surface of the superhydrophobic hydrofluorosilicone acrylic coating has a micro-nano binary structure, and there are particles of 120 to 130 nanometers on the nanometer...

Embodiment 2

[0040] Mix 15g deionized water, 15g silicon acrylic emulsion (solid content 35%), 9g tetrafluoroethylene and perfluorovinyl ether copolymer emulsion (solid content 50%), 1g nano-titanium dioxide (diameter 15nm) and 2g carbonic acid under stirring ammonium hydrogen, adjust the pH of the mixture to 8-10 with concentrated hydrochloric acid, and stir evenly to obtain a super-hydrophobic water-based fluorosilicone-acrylic coating containing nanoparticles.

[0041] Thoroughly stir the coating prepared above, apply the coating evenly on the surface of polyethylene terephthalate (PET) with a wet film preparation device with a thickness of 90 microns, and dry it at 50°C for 15 hours, and the obtained white coating is Superhydrophobic water-based fluorosilicone coating. The wettability of the coating surface was tested with a contact angle tester, and the result showed that the contact angle between the surface and water was 152±2°, and the rolling angle was 4±1°.

Embodiment 3

[0043] Mix 15g deionized water, 8g silicon acrylic emulsion (solid content 35%), copolymer emulsion (solid content 58%) of 12g tetrafluoroethylene and hexafluoropropylene, 4g nano silicon dioxide aqueous dispersion liquid (diameter 4nm) under stirring. , solid content 15%) and 3g of ammonium bicarbonate, adjust the pH value of the mixture to 7-9 with concentrated hydrochloric acid, and stir evenly to obtain a super-hydrophobic water-based fluorosilicone-acrylic coating containing nanoparticles.

[0044] Thoroughly stir the paint prepared above, apply the paint evenly on the surface of the stainless steel plate with a 90-micron thick wet film maker, and dry it at 80°C for 15 minutes. The white coating obtained is the superhydrophobic water-based fluorosilicone coating. The wettability of the coating surface was tested with a contact angle tester, and the result showed that the contact angle between the surface and water was 153±2°, and the rolling angle was 3±2°.

technical field

[0001] The invention relates to a coating composition, in particular to a water-based fluorosilicone-acrylic coating containing nanoparticles. Background technique

[0002] With the continuous development of my country's economy, the building and its supporting decoration industry have simultaneously entered an era of unprecedented rapid development. Chinese people regard architecture as a century-old project and require durable exterior wall decoration. They generally emphasize the importance of weather resistance and durability of exterior wall coatings. In fact, as a decorative coating for exterior walls, stain resistance and weather resistance are two aspects of a problem, which are equally important. If the coating has good weather resistance but poor stain resistance, even if the coating does not fall off for a hundred years, the building will soon become dirty and obsolete, which cannot reflect the decorative effect of the paint on the building; simil...

Examples

Embodiment 1

[0036] Mix 15g deionized water, 10g silicon acrylic emulsion (solid content 35%), 7g polytetrafluoroethylene emulsion (solid content 55%), 3g nano silicon dioxide aqueous dispersion (diameter 5nm, solid content 15%) under stirring and 2g of ammonium bicarbonate, adjust the pH of the mixture to 8-10 with concentrated hydrochloric acid, and stir evenly to obtain a superhydrophobic water-based fluorosilicone-acrylic coating containing nanoparticles.

[0037] Thoroughly stir the coating prepared above, apply the coating evenly on the glass surface with a wet film preparation device with a thickness of 90 microns, and dry it at 80° C. for 15 minutes. The resulting white coating is a superhydrophobic water-based fluorosilicone coating (see figure 1 with figure 2 ). from figure 1 with figure 2 We can see that the surface of the superhydrophobic hydrofluorosilicone acrylic coating has a micro-nano binary structure, and there are particles of 120 to 130 nanometers on the nanometer...

Embodiment 2

[0040] Mix 15g deionized water, 15g silicon acrylic emulsion (solid content 35%), 9g tetrafluoroethylene and perfluorovinyl ether copolymer emulsion (solid content 50%), 1g nano-titanium dioxide (diameter 15nm) and 2g carbonic acid under stirring ammonium hydrogen, adjust the pH of the mixture to 8-10 with concentrated hydrochloric acid, and stir evenly to obtain a super-hydrophobic water-based fluorosilicone-acrylic coating containing nanoparticles.

[0041] Thoroughly stir the coating prepared above, apply the coating evenly on the surface of polyethylene terephthalate (PET) with a wet film preparation device with a thickness of 90 microns, and dry it at 50°C for 15 hours, and the obtained white coating is Superhydrophobic water-based fluorosilicone coating. The wettability of the coating surface was tested with a contact angle tester, and the result showed that the contact angle between the surface and water was 152±2°, and the rolling angle was 4±1°.

Embodiment 3

[0043] Mix 15g deionized water, 8g silicon acrylic emulsion (solid content 35%), copolymer emulsion (solid content 58%) of 12g tetrafluoroethylene and hexafluoropropylene, 4g nano silicon dioxide aqueous dispersion liquid (diameter 4nm) under stirring. , solid content 15%) and 3g of ammonium bicarbonate, adjust the pH value of the mixture to 7-9 with concentrated hydrochloric acid, and stir evenly to obtain a super-hydrophobic water-based fluorosilicone-acrylic coating containing nanoparticles.

[0044] Thoroughly stir the paint prepared above, apply the paint evenly on the surface of the stainless steel plate with a 90-micron thick wet film maker, and dry it at 80°C for 15 minutes. The white coating obtained is the superhydrophobic water-based fluorosilicone coating. The wettability of the coating surface was tested with a contact angle tester, and the result showed that the contact angle between the surface and water was 153±2°, and the rolling angle was 3±2°.

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