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Preparation method of modified fluorine-containing acrylic superhydrophobic resin emulsion

A technology of resin emulsion and acrylic acid, applied in coating and other directions, can solve the problems of low success rate of in-situ polymerization method, difficult to meet the growing demand for high-performance fluorine-containing acrylic superhydrophobic resin, etc., and achieve low cost and high success rate. , the effect of simple operation

Inactive Publication Date: 2015-09-02
ZHONGSHAN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the intrinsic difference in hydrophilicity, the current in situ polymerization method also has a low success rate, making it difficult to meet the growing demand for high-performance fluorinated acrylic superhydrophobic resins.

Method used

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  • Preparation method of modified fluorine-containing acrylic superhydrophobic resin emulsion
  • Preparation method of modified fluorine-containing acrylic superhydrophobic resin emulsion
  • Preparation method of modified fluorine-containing acrylic superhydrophobic resin emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Prepare modified fluorine-containing acrylic acid superhydrophobic resin emulsion, the steps are as follows:

[0034] a. Throw ethyl orthosilicate and methyltriethoxysilane into the alcohol solution at a molar ratio of 0.1, raise the temperature to 70°C, and stir for 4 hours, then add emulsifier OP-10 and polyethylene Alcohol, continue to stir until the material is completely dissolved, stop heating and leave to age at room temperature for 10h;

[0035] b. Mix the following monomers by weight uniformly to obtain mixed monomers:

[0036]

[0037]c. Warm up the solution prepared in step a to 75°C, then add the mixed monomer and 1 / 4 of the initiator potassium persulfate solution dropwise at the same time, control the dropping time for 3 hours, and then add 1 / 4 of the solution at one time Initiator solution, continue to keep warm for 0.5h, then add the rest of the initiator solution at one time, and raise the temperature of the solution to 85°C, continue to keep warm fo...

Embodiment 2

[0039] Prepare modified fluorine-containing acrylic acid superhydrophobic resin emulsion, the steps are as follows:

[0040] a. Throw ethyl orthosilicate and dimethyldiethoxysilane into the alcohol solution at a molar ratio of 0.9, raise the temperature to 90°C, and stir for 6 hours, then add emulsifier OP-10, ten Dialkyl sodium sulfate and polyvinyl alcohol, continue to stir until the materials are completely dissolved, stop heating and leave to age at room temperature for 20h;

[0041] b. Mix the following monomers by weight uniformly to obtain mixed monomers:

[0042]

[0043] c. Warm up the solution prepared in step a to 85°C, then add the mixed monomer and 1 / 2 of the initiator potassium persulfate solution dropwise at the same time, control the dropping time for 5 hours, and then add 1 / 3 of the solution at one time Initiator solution, continue to keep warm for 1 hour, then add the rest of the initiator solution at one time, and raise the temperature of the solution to...

Embodiment 3

[0045] Prepare modified fluorine-containing acrylic acid superhydrophobic resin emulsion, the steps are as follows:

[0046] a. Throw ethyl orthosilicate, methyltriethoxysilane, dimethyldiethoxysilane and trimethylchlorosilane into the alcohol solution at a molar ratio of 0.5:0.5:0.25:0.25 , heat up to 80°C, and stir for 5 hours, then add emulsifier OP-10, AES, sodium lauryl sulfate and polyvinyl alcohol, continue to stir until the material is completely dissolved, stop heating and stand at room temperature for 15 hours ;

[0047] b. Mix the following monomers by weight uniformly to obtain mixed monomers:

[0048]

[0049] c. Warm up the solution prepared in step a to 80°C, then add the mixed monomer and 1 / 3 of the mixed initiator solution dropwise at the same time (the mass ratio of sodium persulfate and ammonium persulfate in the initiator solution is 1:2) , control the dropping time for 4 hours, then add 30% of the initiator solution at one time, continue the heat pres...

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Abstract

The invention discloses a preparation method of a modified fluorine-containing acrylic superhydrophobic resin emulsion, which comprises the following steps: preparing an organic hydrophobic modified SiO2 sol by a sol-gel process, and carrying out free-radical polymerization reaction under emulsifying conditions to graft SiO2 onto the fluorine-containing acrylic copolymer resin, thereby obtaining the SiO2 in-situ modified fluorine-containing acrylic superhydrophobic resin emulsion. While free radical emulsion polymerization is utilized to prepare the organic fluorine modified polyacrylate resin, the SiO2 nanoparticles are grafted by the copolymerization reaction, thereby successfully preparing the SiO2 nanoparticle in-situ modified fluorine-containing acrylic resin emulsion, and avoiding the key technical problem of very low modification ratio in the mechanical blending process. After the emulsion is completely dried, the composite coating can have excellent superhydrophobicity, and thus, the emulsion can be abundantly applied to many industrial fields. The reaction technique has the advantages of higher success rate and lower cost, and is simple to operate.

Description

【Technical field】 [0001] The invention relates to a preparation method of a modified fluorine-containing acrylic superhydrophobic resin emulsion, in particular to a method using SiO 2 A method for preparing a fluorine-containing acrylic superhydrophobic resin emulsion modified by in-situ graft copolymerization of nanoparticles. 【Background technique】 [0002] Polyacrylate resin has excellent light resistance, aging resistance, alkali resistance, etc., and has good film-forming properties and adhesion, so it is widely used in coatings, inks, adhesives, automobiles, plastics, fibers and other industries. However, the chemical stability, weather resistance, corrosion resistance and oxidation resistance of polyacrylate resins are lacking, so the current mainstream method is to use organic fluorine to chemically modify polyacrylate resins (that is, fluorine-containing acrylate copolymer resin). [0003] The modification principle of fluorine-containing acrylate copolymer resin ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F212/08C08F220/18C08F220/22C08F220/28C08F220/14C08F218/08C09D151/10
Inventor 王俊陆萱聂建华
Owner ZHONGSHAN POLYTECHNIC
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