Self-layering super-hydrophobic composite coating

A composite coating and super-hydrophobic technology, applied in coatings and other directions, can solve the problems of large polarity difference between silicone hydrophobic agent and main resin, poor mechanical properties of paint film, poor compatibility of two phases, etc., and achieve excellent hydrophobicity , good mechanical properties, and the effect of improving construction efficiency

Pending Publication Date: 2021-12-14
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The publication number is: CN109749619 invention patent discloses a super-hydrophobic and stain-resistant UV coating and its preparation method. The silicone hydrophobic agent and epoxy acrylate do not react, but are mixed without chemical bonds, which is easy to cause silicone The polarity difference between the hydrophobic agent and the main resin is large, and the compatibility of the two phases is poor, resulting in the separation of the two phases that make up the paint film during curing, the deterioration of the mechanical properties of the paint film, and even cracking.

Method used

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  • Self-layering super-hydrophobic composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 1: Put 100 parts of E12 bisphenol A epoxy resin into the reaction kettle, heat up to 100-150°C until heated and melted;

[0037] Step 2: Add 0.01 part of hydroquinone, 0.1 part of 2,4,6-tris(dimethylaminomethyl)phenol and mix well;

[0038] Step 3: Add 6.4 parts of acrylic acid monomer, heat reaction in the range of 80-120°C, control the time within 1-5 hours, and cool to obtain epoxy acrylate;

[0039] Step 4: Mix 50 parts of epoxy acrylate obtained in step 3 with 13 parts of hydrogen-containing silicone oil according to the designed ratio;

[0040] Step 5: Add 20 parts of xylene and 5 parts of platinum catalyst to the mixture obtained in step 4, and mix well;

[0041] Step 6: Mix the two resins obtained in Step 5 and apply them on the surface of the substrate. After volatilizing the solvent, heat to 100-150°C and bake for 2-5 minutes to quickly solidify and form a film.

Embodiment 2

[0043] Step 1: Put 100 parts of E20 bisphenol A epoxy resin into the reaction kettle, heat up to 100-150°C until heated and melted;

[0044] Step 2: Add 0.01 part of hydroquinone, 0.1 part of 2,4,6-tris(dimethylaminomethyl)phenol and mix well;

[0045] Step 3: Add 14.4 parts of acrylic acid monomer, heat the reaction in the range of 80-120°C, control the time within 1-5 hours, and cool to obtain epoxy acrylate;

[0046] Step 4: Mix 50 parts of epoxy acrylate obtained in step 3 with 13 parts of hydrogen-containing silicone oil according to the designed ratio;

[0047] Step 5: Add 20 parts of xylene and 5 parts of platinum catalyst to the mixture obtained in step 4, and mix well;

[0048] Step 6: Apply the mixture obtained in Step 5 on the surface of the substrate, and after volatilizing the solvent, heat to 100-150° C. and bake for 2-5 minutes to quickly solidify and form a film.

Embodiment 3

[0050] Step 1: Put 100 parts of E44 bisphenol A epoxy resin into the reaction kettle, heat up to 100-150°C until heated and melted;

[0051] Step 2: Add 0.01 part of hydroquinone, 0.1 part of 2,4,6-tris(dimethylaminomethyl)phenol and mix well;

[0052] Step 3: Add 31.68 parts of acrylic acid monomer, heat reaction in the range of 80-120°C, control the time within 1-5 hours, and cool to obtain epoxy acrylate;

[0053] Step 4: Mix 50 parts of epoxy acrylate obtained in step 3 with 13 parts of hydrogen-containing silicone oil according to the designed ratio;

[0054] Step 5: Add 20 parts of xylene and 5 parts of platinum catalyst to the mixture obtained in step 4, and mix well;

[0055] Step 6: Apply the mixture obtained in Step 5 on the surface of the substrate, and after volatilizing the solvent, heat to 100-150° C. and bake for 2-5 minutes to quickly solidify and form a film.

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Abstract

The invention relates to a self-layering super-hydrophobic composite coating. The super-hydrophobic coating comprises the following components: epoxy acrylate, hydrogen-containing silicone oil, xylene and a platinum catalyst. The relative mass ratio of the A to the B to the C to the D is (50-70wt%): (13-32wt%): (10-20wt%): (0.1-5wt%). The preparation method comprises the following steps: firstly, carrying out condensation reaction on acrylic acid and epoxy resin to obtain epoxy acrylate, and enabling the tail end of the epoxy acrylate to have carbon-carbon double bonds; and adding hydrogen-containing silicone oil, and adding xylene and a platinum catalyst after the hydrogen-containing silicone oil and the hydrogen-containing silicone oil are uniformly mixed. After the mixture is dispersed and mixed uniformly, the mixture is placed for a certain time to be activated, then the mixture is directly coated on the surface of a base material and dried and cured at room temperature, surface modification of the base material can be achieved, and the base material has the hydrophobic characteristic. The material has the beneficial effects that in the coating curing process, although the formed epoxy acrylate system and hydrogen-containing silicone oil are connected through chemical bonds, the self-layering effect can be realized due to the difference between polarity and density, and the cured coating can simultaneously realize better mechanical properties and excellent hydrophobicity.

Description

technical field [0001] The invention relates to the field of anti-corrosion coatings, in particular to a composite coating capable of realizing superhydrophobic properties by self-layering effect and a preparation method thereof. Background technique [0002] In the field of coating anticorrosion, the traditional single protection function has been difficult to meet the market demand. Utilizing the effect of superhydrophobic surface, functionalized coatings that make the cured coating have properties such as self-cleaning and anti-icing have become a research hotspot. Therefore, with the gradual deepening of research on materials with superhydrophobic properties, superhydrophobic coatings demand is also increasing. [0003] However, most of the current preparation methods still have problems such as harsh preparation conditions, cumbersome steps, and high cost, which cannot be applied in engineering. The superhydrophobic materials that have been put into the market are gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/10C09D7/20
CPCC09D183/10C09D7/20
Inventor 胡振文俞丁卢文广宋江行朱海龙李为立马勇林定多张建新
Owner JIANGSU UNIV OF SCI & TECH
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