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Waterborne single-component transparent anti-corrosion coating based on dual-functionalized nano-SiO2 and preparation method of coating

An anti-corrosion coating, dual-function technology, applied in anti-corrosion coatings, coatings, etc., can solve problems such as water resistance decline, and achieve the effect of improving adhesion and corrosion resistance

Inactive Publication Date: 2015-04-22
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But due to SiO 2 The particle surface contains a large number of hydroxyl groups, which reduces the water resistance of the system

Method used

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  • Waterborne single-component transparent anti-corrosion coating based on dual-functionalized nano-SiO2 and preparation method of coating
  • Waterborne single-component transparent anti-corrosion coating based on dual-functionalized nano-SiO2 and preparation method of coating
  • Waterborne single-component transparent anti-corrosion coating based on dual-functionalized nano-SiO2 and preparation method of coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Bifunctional nano-SiO 2 Preparation of:

[0033] Add 1kg tetraethyl orthosilicate, 5kg ethanol, and ammonia water to adjust the pH value to 8, and react at 20°C for 10 hours to obtain monodisperse nano-SiO with translucent blue fluorescence. 2 sol; then add 0.1kg vinyltrimethoxysilane and react at 20°C for 5h to prepare nano-SiO with double bond modification on the surface 2 Sol; heat up to 50°C, add 1g of tert-butyl hydroperoxide to the above-mentioned double bond modified silica sol, slowly add 0.11kg of hydrogen phosphate di(methacryloyloxyethyl) ester, 0.09kg of hexamethacrylate A mixed solution of fluorobutyl ester and 1g N,N-dimethylaniline, reacted at 50°C for 3 hours after dropping, distilled off ethanol, and pulverized to obtain fluorine-containing phosphorus-containing bifunctional nano-SiO 2 particles.

[0034] Preparation of organic-inorganic hybrid emulsion:

[0035] (1) Core layer pre-emulsion: Add 2.5g sodium lauryl sulfate, 2.5g OP-10, 0.3kg deionize...

Embodiment 2

[0039] Bifunctional nano-SiO 2 Preparation of:

[0040] Add 1kg tetraethyl orthosilicate, 10kg ethanol, and ammonia water to adjust the pH value to 8, and react at 25°C for 8 hours to prepare monodisperse nano-SiO with translucent blue fluorescence. 2 sol; add 0.1kg vinyltriethoxysilane and 0.1kg γ-methacryloxypropyltrimethoxysilane to react at 25°C for 4h to prepare nano-SiO with double bond modification on the surface 2 Sol; heat up to 55°C, add 10g of tert-butyl hydroperoxide to the above-mentioned double bond modified silica sol, slowly add 0.6kg of hydrogen phosphate di(methacryloyloxyethyl) ester, 0.2kg of trimethacrylate A mixed solution of fluoroethyl ester, 0.2kg hexafluorobutyl methacrylate and 10g N,N-dimethylaniline, react at 55°C for 5h after dropping, distill off ethanol, and pulverize to obtain fluorine-containing phosphorus-containing bifunctional nano-SiO 2 particles.

[0041] Preparation of organic-inorganic hybrid emulsion:

[0042] (1) Core layer pre-em...

Embodiment 3

[0046] Bifunctional nano-SiO 2 Preparation of:

[0047] Add 1kg tetraethyl orthosilicate, 8kg ethanol, and ammonia water to adjust the pH to 8, and react at 30°C for 5 hours to prepare monodisperse nano-SiO with translucent blue fluorescence. 2 sol; then add 0.15kg γ-methacryloxypropyltrimethoxysilane to react at 30°C for 5h to prepare nano-SiO with double bond modification on the surface 2 Sol; heat up to 60°C, add 3.6g tert-butyl hydroperoxide to the above-mentioned double bond modified silica sol, slowly add 0.31kg hydrogen phosphate di(methacryloyloxyethyl) ester, 0.29kg methacrylic acid A mixed solution of dodecafluoroheptyl ester and 3.6g N,N-dimethylaniline, reacted at 60°C for 2 hours after dropping, distilled ethanol, and pulverized to obtain fluorine-containing phosphorus-containing bifunctional nano-SiO 2 particles.

[0048] Preparation of organic-inorganic hybrid emulsion:

[0049] (1) Core layer pre-emulsion: add 4.3g allyloxy nonylphenol propanol polyoxyethyl...

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PUM

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Abstract

The invention discloses a waterborne single-component transparent anti-corrosion coating based on dual-functionalized nano-SiO2 particles and a preparation method of the coating. The dual-functionalized nano-SiO2 particles are prepared by introducing double bonds on the surfaces of nano-SiO2 particles, further grafting with di(methacryloyloxyethyl) hydrogen phosphate and a fluorine-containing monomer and simultaneously introducing phosphate groups and fluorocarbon chains on the surfaces of the nanoparticles to prepare the dual-functionalized nano-SiO2 particles; and further polymerizing the dual-functionalized nano-SiO2 particles and an emulsion to obtain dual-functionalized nano-SiO2 hybrid styrene-acrylic emulsion, so that the corrosion resistance of the styrene-acrylic emulsion system is greatly increased. Under the condition that an anti-rust pigment is not added, the emulsion can reach ISO4628-3-2003 Ri 0-level anti-corrosion standard after the emulsion is subjected to salt spray for 500 hours.

Description

technical field [0001] The invention relates to the field of polymer material preparation, in particular to a bifunctional nano-SiO 2 Preparation of waterborne one-component transparent anticorrosion coatings. Background technique [0002] The mechanism of anti-corrosion coating is to form a uniform and dense coating to prevent water, oxygen, and ions from reaching the metal surface to form a corrosion primary battery. This requires anti-corrosion coatings to have certain water resistance, compactness and metal surface passivation ability. Traditional anti-corrosion coatings use organic solvents as the dispersed phase of film-forming resins. With increasingly stringent environmental protection regulations, the development of water-based systems is the development trend of anti-corrosion coatings. Research hotspots of waterborne anti-corrosion coatings. [0003] In the preparation process of water-based styrene-acrylic coatings, in order to improve the dispersion stability...

Claims

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Application Information

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IPC IPC(8): C09D125/14C09D5/08C09D7/12C08F212/08C08F220/18C08F220/06C08F220/58C08F220/28C08F220/56C08F212/36C08F2/26C08F2/30
CPCC08F212/08C08F292/00C08K3/36C08K9/04C09D5/08C09D7/62C09D125/14C08F230/02C08F220/22C08F220/1804C08F212/36C08F220/06C08F220/56
Inventor 方永勤薛博颂许亮王迪
Owner CHANGZHOU UNIV
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