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Water-based antifouling treatment agent

An antifouling, water-based technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of high curing temperature, inconvenient construction, high price, poor adhesion, etc., achieve excellent antifouling performance, improve compatibility The effect of low resistance and adhesion

Pending Publication Date: 2022-06-03
浙江优尼科新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silicone resin has the disadvantages of poor adhesion, low strength and other mechanical properties, and the high curing temperature is not convenient for construction, and the price is relatively expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Asymmetric Amphiphilic Nanoparticle Synthesis

[0025] S1. At room temperature, take 1g of SiO 2 Nanoparticles were added to 20 mL of deionized water, and ultrasonically dispersed for 30 min. Stir and heat to 75°C, then add 10 g of paraffin, and after the paraffin is melted, homogeneously emulsify at high speed. After cooling to below 25°C, a Pickering emulsion was obtained.

[0026] S2. Disperse 0.2 g of butyltrimethoxysilane in methanol solution, add it into the Pickering emulsion of silica, continue stirring, add a small amount of ammonia water for catalysis, and maintain the reaction for 24 hours. The surface of the nanoparticles on the paraffin surface is modified by silylation to obtain nanoparticles with asymmetric structure.

[0027] S3, post-processing: the modified asymmetric structure nanoparticles are carried out. After the reaction is completed, the paraffin balls after the reaction are dissolved by using a solvent, centrifuged, washed with absolute eth...

Embodiment 2

[0030] Asymmetric Amphiphilic Nanoparticle Synthesis

[0031] S1. At room temperature, take 2g of TiO 2 Nanoparticles were added to 20 mL of deionized water, and ultrasonically dispersed for 30 min. Stir and heat to 75°C, then add 15 g of paraffin, and after the paraffin is melted, homogeneously emulsify at high speed. After cooling to below 25°C, a Pickering emulsion was obtained.

[0032] S2. Disperse 1 g of (3,3,3-trifluoropropyl)methyldimethoxysilane in methanol solution, add it to the Pickering emulsion of titanium dioxide, continue stirring, add a small amount of ammonia for catalysis, and maintain the reaction for 24h. The surface of the nanoparticles on the paraffin surface is modified by silylation to obtain nanoparticles with asymmetric structure.

[0033] S3, post-processing: the modified asymmetric structure nanoparticles are carried out. After the reaction is completed, the paraffin balls after the reaction are dissolved by using a solvent, centrifuged, washed...

Embodiment 3～6

[0036] Synthesis of water-based antifouling treatment agent

[0037] The proportions of Examples 3 to 6 and Comparative Examples 1 to 2 are shown in Table 1. After mixing the components in proportion, they were uniformly coated on the PU leather and cured at 130° C. for 10 minutes. Test surface tension (water drop angle), adhesion, as shown in Table 2.

[0038] Table 1

[0039]

[0040]

[0041] The above-mentioned thickener is a nonionic hydrophobically modified polyurethane rheological thickener, and the defoamer is a silicone defoamer.

[0042] Table 2

[0043]

[0044] The test results show that the water-based antifouling treatment agent made of asymmetric amphiphilic nanoparticles has high contact angle and good adhesion.

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Abstract

The invention discloses a water-based antifouling treatment agent which is prepared by mixing a water-based polymer emulsion, asymmetric amphiphilic nanoparticles, a curing agent and an auxiliary agent in proportion. Asymmetric amphiphilic nanoparticles are adopted to modify the antifouling treatment agent, so that the hydrophilic part of the antifouling treatment agent has good compatibility with a water-based emulsion, and the hydrophobic part of the antifouling treatment agent is exposed in a polymer and air interface after being cured to form a dendritic structure. The super-hydrophobic antifouling coating with a micro / nano composite structure is obtained after the treating agent is subjected to isocyanate crosslinking. The coating is high in water contact angle, excellent in self-cleaning property and lyophobicity, low in adhesive force and excellent in antifouling property. The asymmetric amphiphilic nanoparticles are adopted, so that the compatibility of the nanoparticles and the aqueous polymer emulsion is improved, and the adhesive force of the treating agent and the surface of a treated object is improved.

Description

technical field [0001] The invention relates to the technical field of antifouling treatment agents, in particular to a water-based antifouling treatment agent. Background technique [0002] At present, the antifouling treatment agents with good antifouling effect on the market mainly include coatings containing low-toxic and safe antifouling agents and antifouling coatings with low surface energy. Low surface energy mainly refers to silicone series and organic fluorine. series. Generally, compounds containing fluorine and silicon have very small surface energy, so they have properties such as water and oil repellency, chemical resistance, lubricity, mold release, and antifouling properties. Taking advantage of its properties, it is widely used in industry as a water-repellent, oil-repellent and antifouling agent for the surface of a wide range of materials such as glass, metal, resin, paper, and fiber, as a lubricant for magnetic recording media, as an oil-repellent agent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D175/04C09D7/62
CPCC09D133/00C09D175/04C09D7/62C08K2201/011C08K2003/2241C08K9/06C08K3/36C08K3/22
Inventor 徐立强尹菊
Owner 浙江优尼科新材料有限公司
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