Sprayable super-hydrophobic self-cleaning coating

A self-cleaning, super-hydrophobic technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of time-consuming and labor-consuming, cumbersome preparation process, and inability to preserve, and achieve low cost, low pollution, and easy long-term preservation Effect

Active Publication Date: 2014-07-02
常州纳浩新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation process of this kind of self-cleaning coating is usually cumbersome, and it needs to be prepared on the construction site, which is time-consuming and labor-intensive, and cannot be stored for a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0011] The preparation method of the coating of the present invention: mix reagent-grade acetone, reagent-grade ethyl acetate, and reagent-grade dimethylformamide according to a volume ratio of 1:1:1, then add polyurethane resin and stir evenly, add silane coupling agent, and seal Store in industrial spray bottle A; mix reagent grade acetone, reagent grade ethyl acetate, and reagent grade dimethylformamide in a volume ratio of 1:1:1, then add polytetrafluoroethylene powder and silane coupling agent, and magnetically After stirring evenly, seal and store in industrial spray bottle B.

[0012] Superhydrophobic self-cleaning paint spraying method of the present invention is as follows:

[0013] Before the paint is applied, clean the surface to be sprayed. During implementation, shake the spray bottle A at a constant speed for 30 seconds, and then spray at a position 20-30 cm away from the surface. After waiting for 30 minutes at room temperature, shake the spray bottle B at a c...

Embodiment 1

[0015] Polyurethane resin: 3 grams

[0016] Mixed solvent 1: (5 grams of acetone, 5 grams of ethyl acetate, 5 grams of dimethylformamide) 15 grams

[0017] Silane coupling agent (base material): 0.5g

[0018] Silane coupling agent (filler): 0.5g

[0019] PTFE powder: 5 grams

[0020] Mixed solvent two: (4 grams of acetone, 4 grams of ethyl acetate, 4 grams of dimethylformamide) 12 grams

[0021] According to the ratio of the materials listed in the formula, the super-hydrophobic surface is obtained through the coating preparation and spraying method introduced above. When 2 μL of deionized water is dropped on the superhydrophobic surface, the contact angle is 157°-159°, and the sliding angle is 3°-6°.

Embodiment 2

[0023] Polyurethane resin: 3 grams

[0024] Mixed solvent 1: (5 grams of acetone, 5 grams of ethyl acetate, 5 grams of dimethylformamide) 15 grams

[0025] Silane coupling agent (base material): 0.5g

[0026] Silane coupling agent (filler): 0.5 g

[0027] PTFE powder: 5 grams

[0028] Mixed solvent two: (4 grams of acetone, 4 grams of ethyl acetate, 4 grams of dimethylformamide) 12 grams

[0029] According to the ratio of the materials listed in the formula, the super-hydrophobic surface is obtained through the coating preparation and spraying method introduced above. Drop 2 μL of alkaline solution with a pH value of 14 on the superhydrophobic surface, the contact angle is 152°-155°, and the sliding angle is 7°-9°.

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Abstract

The invention relates to the technical field of super-hydrophobic coating, and particularly relates to sprayable super-hydrophobic self-cleaning coating. The sprayable super-hydrophobic self-cleaning coating comprises base coat and filler, wherein the base coat comprises 20-40 parts of polyurethane, 100-200 parts of mixed solvent I and 5-10 parts of 3-aminopropyl triethoxysilane, the filler comprises 40-50 parts of polytetrafluoroethylene powder, 100-200 parts of mixed solvent II and 5 parts of 3-aminopropyl triethoxysilane, and the mixed solvent I and the mixed solvent II comprise reagent-grade acetone, reagent-grade ethyl acetate and reagent-grade dimethylformamide, the volume ratio of which is 1: 1: 1. The sprayable super-hydrophobic self-cleaning coating has excellent performances such as super hydrophobicity, pollution prevention, freezing resistance, sticking prevention, resistance reduction and radiation prevention. Meanwhile, the sprayable super-hydrophobic self-cleaning coating is low in cost, low-pollution and easy to store for a long term and can be sprayed.

Description

technical field [0001] The invention relates to the technical field of superhydrophobic coatings, in particular to a sprayable superhydrophobic self-cleaning coating. Background technique [0002] Superhydrophobic means that water droplets are spherical on the surface with a contact angle greater than 150°. Superhydrophobic materials can be used to make coatings to achieve self-cleaning effect by avoiding water sticking and reducing the adhesion of pollutants on the surface; Condensation on the surface. Therefore, superhydrophobic coatings can be applied to the exterior walls of buildings, automotive glass, surfaces of ships and ships, satellite antennas and other fields. At present, the preparation process of this kind of self-cleaning coating is usually cumbersome, and it needs to be prepared on the construction site, which is time-consuming and labor-intensive, and cannot be stored for a long time. Contents of the invention [0003] In order to overcome the deficienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/18C09D175/04C09D7/12
Inventor 吴俊
Owner 常州纳浩新材料科技有限公司
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