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Method for preparing super-hydrophobic coating

A technology of superhydrophobic coatings and coating additives, which is applied in antifouling/underwater coatings, polyester coatings, polyurea/polyurethane coatings, etc., and can solve problems such as mildew and discoloration, short service life of coating surfaces, and reduced service life. Achieve the effect of not easy to become dirty and strong waterproof function

Pending Publication Date: 2020-07-14
疏科纳米疏水科技(嘉兴)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are many waterproof coatings on the market, but the main method is to add organic polymers or resins to achieve the waterproof effect. The waterproof effect of this coating is limited, because the surface of the coating is hydrophilic, and its surface is easy to absorb water and dirt, resulting in the use of the coating surface. Short life and mildew and discoloration, reducing service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0055] The preparation method of described nano hydrophobic emulsion:

[0056] Dissolve the emulsifier in proportion to hot water at 50-80°C, and mechanically stir the mixture for 30 minutes until a uniform emulsion is formed; when the temperature of the emulsion drops to about 25°C at room temperature, use a small amount of 10% hydrochloric acid or 10% Sodium hydroxide solution to adjust the pH value to 7±1; then use a high shear machine to stir the emulsion at a speed of 800 to 2000rpm, while slowly adding the active substance, and continue stirring the mixture at high speed for 30 minutes until a uniform milky white concentrate is formed lotion.

Embodiment 1

[0057] Embodiment 1 (effective active substance content is 0.1%);

[0058] 25 kilograms of acrylic resins and 5 kilograms of phenolic resins are mixed with 2 kilograms of calcium stearate, 1 kilogram of silica fume, 0.033 kilograms of quicklime and 4 kilograms of water, and then fully mixed with 3.3 kilograms of nanometer superhydrophobic emulsions with a concentration of 1% until Form a mixture of homogeneous phase and suitable consistency, and apply it according to the method of normal painting. After it is completely dry, it can show the characteristic of hydrophobic surface.

Embodiment 2

[0059] Embodiment 2 (effective active substance content is 4%);

[0060] Mix 20 kg of acrylic resin, 6 kg of alkyd resin and 4 kg of polyurethane resin with 10 kg of calcite, 5 kg of gypsum powder, 1.4 kg of slaked lime powder, and 10 kg of water, and then mix it with 18 kg of nano-superhydrophobic emulsion with a concentration of 10%. Mix thoroughly until a homogeneous mixture of suitable consistency is formed, apply as normal paint application, and show hydrophobic surface characteristics after complete drying.

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PUM

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Abstract

The invention discloses a method for preparing a super-hydrophobic coating, which relates to a method for preparing the super-hydrophobic coating. The invention mainly aims to solve the problem that the waterproof effect of the existing waterproof coating is limited. The coating is prepared from the following raw materials: a film-forming substance, a coating additive, water and a nano super-hydrophobic emulsion. The method comprises the following steps: mixing the film-forming substance with the coating additive, water and the nano super-hydrophobic emulsion, and uniformly stirring; wherein the coating additive accounts for 10%-300% of the weight of the film forming matter, the effective active matter of the nano super-hydrophobic emulsion accounts for 0.1%-20% of the sum of the weight ofthe film-forming substance and the weight of the coating additive, and the concentration of the effective active matter of the nano super-hydrophobic emulsion is 1%-70%; wherein the addition amount of the water is the viscosity required for forming a conventional coating during brushing. An alkaline auxiliary agent can also be added, and the alkaline auxiliary agent accounts for 0.1%-20% of the sum of the weight of the film forming matter and the weight of the coating auxiliary agent. The waterproof paint has the advantages of water repellency, dirt repellency and self-cleaning function whichare not realized by the common waterproof coating.

Description

Technical field: [0001] The invention relates to a method for preparing a superhydrophobic coating. Background technique: [0002] At present, there are many waterproof coatings on the market, but the main method is to add organic polymers or resins to achieve the waterproof effect. The waterproof effect of this coating is limited, because the surface of the coating is hydrophilic, and its surface is easy to absorb water and dirt, which leads to the use of the coating surface. Short life and moldy discoloration, reducing service life. Invention content: [0003] The technical problem to be solved by the present invention is to provide a method for preparing a superhydrophobic coating with good waterproof effect, water and dirt repelling and self-cleaning functions. [0004] The above purpose is achieved in this way: [0005] The raw materials used are: film-forming substances, coating additives, water, and nano-superhydrophobic emulsion; the film-forming substances, coat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D125/14C09D161/06C09D167/08C09D175/04C09D161/20C09D5/16C09D7/61C09D7/63
CPCC08K2003/2206C08K2003/265C08K2003/3045C08L2205/03C08L2205/035C09D5/1618C09D5/1637C09D5/1668C09D5/1675C09D5/1687C09D125/14C09D133/00C09D175/04C08L61/06C08L83/04C08K5/098C08K3/36C08K3/22C08L67/08C08L75/04C08K3/30C08K3/26C08L91/00C08K13/02C08L61/20
Inventor 宋永生
Owner 疏科纳米疏水科技(嘉兴)有限公司
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