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Nano composite cold galvanized coating and preparation method thereof

A nano-composite, cold-dip galvanizing technology, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of high hydrophilicity, reduce coating porosity and hydrophilicity, high porosity, etc., to achieve strong hydrophobicity, Improved impact resistance and improved storage stability

Active Publication Date: 2015-03-25
HAINAN POWER GRID CO LTD ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings of high porosity and high hydrophilicity in existing cold-dip galvanized coatings, the purpose of the present invention is to provide a nanocomposite cold-dip galvanized coating and its preparation method, which significantly reduces the porosity and hydrophilicity of the coating.

Method used

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  • Nano composite cold galvanized coating and preparation method thereof
  • Nano composite cold galvanized coating and preparation method thereof
  • Nano composite cold galvanized coating and preparation method thereof

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preparation example Construction

[0027] The preparation method of the nanocomposite cold galvanized coating of the present invention is carried out in the following order and steps:

[0028] (1) Preparation of modified zinc powder

[0029] Add the solvent in the reaction kettle, add 0.1% to 10% (preferably 0.5% to 8%) of the solvent mass in the stirring state, and then add 5% to 50% (preferably 10% to 8%) of the solvent mass 40%) by adding zinc powder, heating to 25°C-100°C, and reacting for 0.5h-3h. After the reactant is centrifuged, the powder is taken out, carefully rinsed with a solvent for 2 to 5 times, then dried at 100°C to 120°C for 0.5h to 6h, and then ground into powder to make modified zinc powder.

[0030] (2) Add acrylic resin, solvent, and additives to the reaction kettle in sequence, and disperse at a speed of 300rpm~1000rpm for 10~60min; then slowly add modified zinc powder, and then disperse at 500rpm~1500rpm for 20min~120min, and discharge after filtration , made of nano-composite cold gal...

Embodiment 1

[0043] Add 1000kg of xylene in the reaction kettle, add 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane with 0.5% of the xylene mass in a stirring state, and then add zinc powder (98.04 kg of 45μm zinc powder, 1.96kg of 40nm zinc powder), heated to 75°C, and reacted for 1 hour. After the reactant is centrifuged, the powder is taken out, rinsed with xylene for 3 times, dried at 120°C for 30 minutes, and then ground into powder to make modified zinc powder.

[0044] Add 166.7kg acrylic resin, 200kg xylene, 0.5kg Disperbyk-163 dispersant, 0.2kg BYK-066 defoamer, 0.5kg EFKA 3600 leveling agent, 0.5kg BENTONE SD-2 anti-settling agent into the reaction kettle in sequence , disperse at 700rpm for 20min; then slowly add 833.3kg of modified zinc powder, then disperse at 1100rpm for 60min, filter and discharge to make a nanocomposite cold-dip galvanized coating, the content of zinc powder in the dry film of the coating is greater than 96%.

Embodiment 2

[0046] Add 1000kg xylene in the reaction kettle, add 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane with 2% xylene mass in a stirring state, then add zinc powder (150kg xylene mass) by 20% xylene mass 45μm zinc powder, 50kg of 40nm zinc powder), heated to 75°C, and reacted for 1 hour. After the reactant is centrifuged, the powder is taken out, rinsed with xylene for 3 times, dried at 120°C for 30 minutes, and then ground into powder to make modified zinc powder.

[0047] Add 166.7kg acrylic resin, 200kg xylene, 0.5kg Disperbyk-163 dispersant, 0.2kg BYK-066 defoamer, 0.5kg EFKA 3600 leveling agent, 0.5kg BENTONE SD-2 anti-settling agent into the reaction kettle in sequence , disperse at 700rpm for 20min; then slowly add 833.3kg of modified zinc powder, then disperse at 1100rpm for 60min, filter and discharge to make a nanocomposite cold-dip galvanized coating, the content of zinc powder in the dry film of the coating is greater than 96%.

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Abstract

The invention relates to a nano composite cold galvanized coating and a preparation method thereof and belongs to the field of nano coatings. The nano composite cold galvanized coating is prepared from the following raw materials in parts by weight: 2-25 parts of acrylic resin, 0.1-5 parts of an assistant, 75-98 parts of zinc powder and 1-70 parts of a solvent, wherein the zinc powder is a mixture of micro-scale zinc powder and nano-scale zinc powder modified by a fluorosilane coupling agent, so that the dispersity of the zinc powder is increased; the compatibility with resin is improved; the coat made of the nano composite cold galvanized coating has high hydrophobic property; the water contact angle is greater than or equal to 135 degrees; the porosity of the cold galvanized coating is significantly reduced; the corrosion resistance of the coating is improved; the nano composite cold galvanized coating disclosed by the invention can be widely applied to anti-corrosion engineering with a novel steel structure, old and new hot-dip galvanizing structures and an electric galvanized steel structure; and the difficulty in corrosion maintenance of transmission and substation facilities and substation equipments can be conveniently and rapidly solved.

Description

technical field [0001] The invention relates to a nanocomposite cold galvanized paint and a preparation method thereof, belonging to the field of nanometer paints. Background technique [0002] Most of the power transmission and transformation facilities in my country are assembled by hot-dip galvanized steel components. Hot-dip galvanized steel components are prone to local damage during transportation and installation, and the damaged parts will become corrosion sources. In addition, the hot-dip galvanized layer is also very easy to corrode under acid rain conditions. For corroded hot-dip galvanized steel structure power towers, conventional alkyd coatings, epoxy coatings, polyurethane coatings, etc. are usually used for maintenance. Alkyd coatings and acrylic coatings are one-component coatings, which are easy to use, but have poor protection performance, and the general service life is about three years. Epoxy coatings and polyurethane coatings have good protective pro...

Claims

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Application Information

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IPC IPC(8): C09D133/00C09D5/10
CPCC08K3/08C08K9/06C08K2003/0893C08K2201/011C09D5/106C09D133/00
Inventor 杨大宁刘福春符传福韩恩厚张奇伟柯伟陈林聪
Owner HAINAN POWER GRID CO LTD ELECTRIC POWER RES INST
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