Preparation method of self-cleaning hydrophobic anti-corrosion coating for fence

An anti-corrosion coating and self-cleaning technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of unfavorable substrate corrosion resistance, affecting the salt spray resistance time of epoxy resin, etc., and achieve safe use and hydrophobicity. Good and good water solubility

Active Publication Date: 2019-03-22
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that the epoxy emulsion in the existing paint will affect the salt spray resistance time of the epoxy resin, which is not conducive to the improvement of the corrosion resistance of the substrate, and provides a preparation method of a self-cleaning hydrophobic anti-corrosion paint for fences

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0035] Specific implementation mode one: the self-cleaning hydrophobic anti-corrosion coating for the fence in this embodiment comprises the following steps:

[0036] 1. Add glycerin to vegetable oil, alcoholyze at 220-240°C for 6-7 hours under nitrogen gas, then add water-based functional monomers for grafting, and react at 200-220°C for 4-6 hours to prepare an emulsifier;

[0037] 2. Put the epoxy resin and the emulsifier prepared in step 1 in the reaction kettle, stir evenly at 50-55°C, weigh water according to 25%-50% of the mass of the epoxy resin, first add part of the water drop by drop, when the viscosity changes suddenly Add the remaining water, continue to emulsify at constant temperature for 0.5-1h, and then ultrasonically disperse at 20-50°C for 1-3h to obtain epoxy emulsion;

[0038] 3. Add silicone emulsion S-8861, pigments and glass microchips to the epoxy emulsion, and continue ultrasonication for 1-2 hours to obtain component A;

[0039] 4. Mix component A an...

specific Embodiment approach 2

[0040] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the vegetable oil described in step one is tung oil, linseed oil, soybean oil, castor oil or catalpa oil. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0041] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the water-based functional monomer described in step one is sodium 3-carboxybenzenesulfonate, sodium isophthalic acid-5-sulfonate or isophthalic acid Sodium dimethyl formate-5-sulfonate. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of hydrophobic anticorrosion coating, in particular to a preparation method of self-cleaning hydrophobic anticorrosion coating for fences. The invention is intended to solve the problem that epoxy emulsion in existing coatings may affect salt spray tolerant time of epoxy resin and is not good for the improvement of the corrosion resistance of a base. The method comprises: I, adding glycerol into vegetative oil for alcoholysis, and adding a waterborne functional monomer for grafting to prepare an emulsifier; II, adding epoxy resin and the emulsifier into a reactor, stirring well, dropwise adding part of water, adding the rest of the water upon a sudden viscosity change, emulsifying at constant temperature, and ultrasonically dispersing to obtain epoxy emulsion; III, adding organosilicon emulsion, a pigment and a glass microchip into the epoxy emulsion, and ultrasonically treating to obtain component A; IV, mixing the component A with component B to obtain the self-cleaning hydrophobic anticorrosion coating for fences. After being dry, film of the coating has anticorrosion capacity, also has high contact angle and low roll angle, and has good hydrophobicity. The preparation method is applicable to the preparation of coatings.

Description

technical field [0001] The invention relates to a preparation method of a hydrophobic anticorrosion coating. Background technique [0002] The coatings used for fences mainly play the role of beautifying the appearance and anti-corrosion. The commonly used fence coatings are mainly organic solvent coatings, and they do not have hydrophobic properties. Traditional fence coatings generally use epoxy resin, polyurethane resin, polyester resin or alkyd resin as the polymer matrix. The high molecular weight of the polymer is used to protect the fence from corrosion, and fillers such as graphite powder, titanium dioxide, and iron red are added. The role of pigments and anti-corrosion fillers. Because fences are generally used outdoors, taking fences and isolation belts as examples, they are in a dusty and polluted environment, and they are very easy to get dirty, and cleaning them will waste a lot of resources and manpower. [0003] Epoxy resin is a commonly used anti-corrosion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D183/04C09D5/08C09D7/61C09D7/65C08G63/49
CPCC08G63/48C08L2205/03C08L2205/06C09D5/08C09D7/61C09D7/65C09D7/70C09D163/00C08L83/04C08L67/08C08K13/04C08K3/40C08K2003/2241C08K3/04C08K2003/2272
Inventor 张笑瑞胡光凯刘立柱翁凌胥焕岩
Owner HARBIN UNIV OF SCI & TECH
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