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Super-hydrophobic acrylic polyurethane coating and preparation method thereof

An acrylic polyurethane and super-hydrophobic technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of complex preparation process, unsuitable dip coating method, easy peeling of hydrophobic gel layer, etc., and achieve broad application prospects and preparation The method is simple and easy, and the effect of increasing durability

Active Publication Date: 2015-09-16
浙江国能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of this method is relatively complicated, the hydrophobic gel layer is easy to peel off, and the dip coating method is not suitable for the coating of large equipment or components

Method used

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  • Super-hydrophobic acrylic polyurethane coating and preparation method thereof
  • Super-hydrophobic acrylic polyurethane coating and preparation method thereof
  • Super-hydrophobic acrylic polyurethane coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] At room temperature to 30°C, add 10 parts of silica particles with a particle size of 50-100nm and 0.5 parts of vinyltriethoxy to the alkaline medium (pH=9) containing 45 parts of ethanol and 20 parts of ammonia water Silane, reacted for 0.5h under the action of ultrasonic waves, obtained modified hydrophobic particles after suction filtration and drying;

[0048] Dilute 15 parts of acrylic resin (solid content 70%) in 45 parts of organic solvent, then add 0.1 part of BYK-163#, 0.1 part of BYK-300# and 6 parts of modified hydrophobic particles, and mix the modified The hydrophobic particles are mixed evenly with the resin system (referred to as component A);

[0049] According to the molar ratio of the isocyanate in the curing agent to the hydroxyl group in the base resin of 1.05:1, mix the HDI trimer with the A-component paint, dilute it to a solid content for spraying, spray it on the substrate, and cure it at room temperature for 8 hours. Superhydrophobic acrylic po...

Embodiment 2

[0051] At room temperature to 30°C, add 12 parts of gamma-alumina particles with a particle size of 100-500nm and 1.2 parts of ten Heptafluorodecyltriethoxysilane was reacted for 1 hour under the action of ultrasonic waves, and modified hydrophobic particles were obtained after suction filtration and drying;

[0052] Dilute 27 parts of hydroxyacrylic resin (solid content 75%) in 63 parts of organic solvent, then add 0.3 part of Deqian 433#, 0.5 part of BYK-300# and 8 parts of modified hydrophobic particles, and mix the modified Hydrophobic particles are mixed evenly with the resin system (marked as component A);

[0053] Mix HDI biuret with component A paint according to the molar ratio of isocyanate in the curing agent to hydroxyl in the matrix resin of 1.05:1, dilute to a solid content for spraying, spray on the substrate, and cure at room temperature for 12 hours to obtain Superhydrophobic acrylic polyurethane coating.

Embodiment 3

[0055] At room temperature to 30°C, add 13 parts of rutile titanium dioxide with a particle size of about 100-300nm and 2.4 parts of tridecafluorooctyl triethyl Oxysilane, reacted for 1.5h under the action of ultrasonic waves, obtained modified hydrophobic particles after suction filtration and drying;

[0056] Dilute 30 parts of polyester-modified hydroxyl acrylic resin (solid content 80%) in 75 parts of organic solvent, then add 1.0 parts of BYK-163#, 0.9 parts of BYK-3700# and 10 parts of modified hydrophobic particles, Mix the modified hydrophobic particles with the resin system evenly through a high-speed mixer (marked as component A);

[0057] According to the molar ratio of the isocyanate in the curing agent to the hydroxyl group in the base resin of 1.1:1, mix the IPDI trimer with the A-component paint, dilute to the solid content of the spray, spray it on the substrate, and cure it at 80°C for 30 minutes. Obtain a superhydrophobic acrylic polyurethane coating.

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Abstract

The invention discloses a super-hydrophobic acrylic polyurethane coating and a preparation method thereof, and belongs to the technical field of chemical materials. The super-hydrophobic acrylic polyurethane coating is prepared from the following raw materials in parts by weight: 5-10 parts of modified hydrophobic particles, 15-30 parts of hydroxyl acrylic resin, 0-1 part of a leveling agent, 0-1 part of a dispersant, 4-13 parts of a curing agent and 45-75 parts of a solvent by virtue of spray coating and curing. The water contact angle of the super-hydrophobic acrylic polyurethane coating disclosed by the invention can be as high as 160 degrees, the roll angle is less than 10 degrees, a water drop falling on the coating tumbles off extremely easily, the adhesive force of the coating can reach a 0 level, and the coating is marvelous in flexibility and impact resistance. The preparation method of the coating disclosed by the invention is simple and feasible, the used raw materials are convenient and easy to obtain, the process condition is easy to realize industrial large-scale production, and the super-hydrophobic acrylic polyurethane coating has a broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of chemical materials and relates to a superhydrophobic coating and a preparation method thereof, in particular to a superhydrophobic acrylic polyurethane coating with excellent adhesion and good wear resistance and a preparation method thereof. Background technique [0002] The super-hydrophobic coating has an ultra-high water contact angle and a very low rolling angle, which can make water droplets slide down the coating surface quickly, take away the dust and dirt on the surface, and endow the coating with self-cleaning function. Superhydrophobic coatings have broad application prospects in the fields of anti-fouling, anti-icing, anti-fog and marine anti-corrosion due to their unique wetting properties and self-cleaning properties. At present, most of the superhydrophobic coatings reported in the literature have problems such as poor wear resistance, low adhesion, and inability to maintain hydrophobicity ...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/12C08G18/62
Inventor 李瑜贾冬梅薛芳井新利
Owner 浙江国能科技有限公司
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