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Acrylic resin coating material with superhydrophobicity and preparation method thereof

An acrylic resin, coating material technology, applied in the direction of coating, can solve the problems of poor substrate adhesion, brittle coating film, difficult to introduce cross-linking points, etc., to achieve superior super-hydrophobic performance, good performance stability Effect

Inactive Publication Date: 2013-06-19
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these polymers are generally not suitable for use as raw materials for coatings, because they have poor adhesion to the substrate, the coating film is brittle, and it is difficult to introduce crosslinking points.

Method used

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  • Acrylic resin coating material with superhydrophobicity and preparation method thereof
  • Acrylic resin coating material with superhydrophobicity and preparation method thereof
  • Acrylic resin coating material with superhydrophobicity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment one: Specific steps are as follows:

[0044] Use thermoplastic acrylic resin (acrylic resin with resin monomer composition mass ratio of 80% methyl methacrylate 10% butyl acrylate 10% dodecafluorobutyl methacrylate as an example) as the resin component, and a certain proportion of solvent (Take tetrahydrofuran as an example) and alkane precipitant (octane as an example) are fully mixed to form a mixed solution. The amount of precipitant is more than 10%, and the amount added is based on the cloud point of the solution as the upper limit to keep the solution clear and transparent. Taking the above system as an example, when the content of acrylic resin in the system is 1%, the content of tetrahydrofuran is 61% and the content of n-octane is 38%, it can be formulated into a coating for super-hydrophobic coating.

[0045] Apply the prepared coating on the target surface, and the superhydrophobic surface can be prepared after the solvent evaporates and dries. ...

Embodiment 2

[0046] Embodiment two: This embodiment is basically the same as Embodiment 1, except that a thermosetting hydroxy acrylic resin is used. The mass ratio of each monomer composition is:

[0047] Methyl methacrylate 65%

[0048] Butyl Acrylate 10%

[0049] Dodecafluorobutyl methacrylate 10%

[0050] Hydroxyethyl Methacrylate 15%

[0051] When preparing the mixed solution of the synthesized acrylic resin, an appropriate proportion of the curing agent of the resin is added. The amount of curing agent is usually determined according to the hydroxyl content of the resin, and the ratio of hydroxyl to isocyanate is usually 1:1. Take the above-mentioned hydroxyacrylic resin and Bayer 3300 as an example: the required coating resin can be obtained by mixing the mass ratio of 4.5:1. Dissolve resin and curing agent in tetrahydrofuran, then gradually add octane precipitant, the amount of precipitant added should reach the cloud point of the solution as the upper limit, and keep the so...

Embodiment 3

[0053] Embodiment three: This embodiment is basically the same as the first embodiment, except that a thermosetting epoxy acrylic resin is used. The mass ratio of resin monomer composition is as follows:

[0054] Methyl methacrylate 65%

[0055] Butyl Acrylate 10%

[0056] Dodecafluorobutyl methacrylate 10%

[0057] Glycidyl methacrylate 15%

[0058] The acrylic resin obtained by the above synthesis is equipped with the curing agent isophoronediamine of the resin in a mass ratio of 22:1. The amount of curing agent is usually determined according to the epoxy group content of the resin, and the ratio of epoxy group to active hydrogen is usually 1:1. Then, the above-mentioned epoxy acrylic resin and isophorone diamine are dissolved in butyl acetate to obtain the desired coating resin.

[0059] Apply the prepared coating on the target surface, and the superhydrophobic surface can be prepared after the solvent evaporates and dries.

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Abstract

The invention relates to an acrylic resin coating material with super-hydrophobicity and a preparation method thereof. The material comprises the following components in percentage by weight: 1-10% of an acrylic resin system and 90-99% of a dispersion medium, wherein the dispersion medium consists of a good solvent capable of dissolving the resin and a precipitating agent incapable of dissolving the resin; the ratio of the good solvent to the precipitating agent is determined in the way that the resin is in a dissolution state at an initial stage and gradually forms a microstructure for implementing super drainage in a volatilizing process; and the acrylic resin system is formed by thermosetting acrylic resin matched with corresponding curing agents or merely consists of thermoplastic acrylic resin. After the coating material is coated on the surface of a target and dried, a filler-free superhydrophobic acrylic resin coating can be acquired through the phase separation of the coating material. The coating material has equivalent application characteristics in the waterproof, anti-staining and anti-freezing aspects, and can be applied to waterproof and anti-freezing fields of electric appliances, buildings and chemical industries.

Description

technical field [0001] The invention relates to a non-filler acrylic resin coating material with superhydrophobicity and a preparation method thereof. Background technique [0002] The hydrophilicity and hydrophobicity of a solid surface can be evaluated by the contact angle of water on the surface. Generally speaking, a surface with a water contact angle of more than 150° and a rolling angle of less than 10° is called a superhydrophobic surface. Superhydrophobic surfaces have important theoretical and practical significance in fluid drag reduction, waterproof, anti-fog and anti-icing, self-cleaning, etc., and have important application prospects in industrial and agricultural production and daily life. Due to its special properties, the preparation of superhydrophobic self-cleaning coatings has attracted widespread attention in recent years. The snow and rain protection of aircraft wings, wind turbines, automobile windshields, wire and cable surfaces, doors and windows of b...

Claims

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Application Information

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IPC IPC(8): C09D133/00C09D133/12
Inventor 刘引烽杨呈夏房嫄赵凯凯李琛骏杨小瑞周海堤王宇翔
Owner SHANGHAI UNIV