A kind of preparation method of water-based acrylic composite metal anti-corrosion coating modified by isocyanate curing agent
A water-based acrylic and isocyanate technology, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of low overall strength of coatings, poor anti-corrosion effect, low comprehensive performance, etc., achieve good surface sag resistance, improve anti-corrosion effect, strong Restorative effect
Inactive Publication Date: 2016-02-24
ZHOUSHAN HENGTAI PAINT IND
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[0004] Compared with foreign water-based anti-corrosion coatings, the existing domestic water-based anti-corrosion coatings generally have poor anti-corrosion effects, and the overall strength of the coating is low, the weather resistance is poor, and the comprehensive performance is low
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[0018] The preparation method of one-component water-based anticorrosion coating:
[0019] A kind of preparation method of the waterborne acrylic composite metal anticorrosion paint modified by isocyanate curing agent, described preparation method comprises the following steps:
[0020] (1) Preparation of water-based acrylic resin emulsion modified by isocyanate curing agent: add 10g of PVA aqueous solution, 1g of sodium bicarbonate, 2gTX-10, 185g of deionized water, adjust the temperature to 60-90°C, add 1.5g of ammonium persulfate, and stir well. Then weigh the mixed solution containing 130g n-butyl acrylate, 20g methyl methacrylate, 20g styrene, and 30g acrylamide, use a constant pressure dropping funnel to drop it at a constant speed for 3 hours, keep it warm for 1h, and then drop it to room temperature , slowly add HDI trimer 10g, react for 0.5h, and prepare an aqueous acrylic resin emulsion modified by an isocyanate curing agent;
[0021] (2) Preparation of one-compon...
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A preparation method of water-based acrylic composite metal anti-corrosion coating modified by isocyanate curing agent, which adopts the form of one-component and two-component, can be used together with water-based epoxy or acrylic primer and intermediate paint, and can also be used for On the solvent-based coating, a cross-composite coating anti-corrosion system is formed, and an isocyanate curing agent is used to modify the acrylic resin to form a cross-network structure, which improves the compactness of the coating, reduces the film-forming temperature of the coating, and facilitates construction. Activated carbon-based powder reducing agent, which is combined with zinc-containing compounds, has strong reducing ability, greatly improves the anti-corrosion effect of water-based coatings (especially for steel components), and shows a good performance in the construction process. Excellent construction performance, compared with traditional alkyd systems, there is little dry dust, and it can show good surface sag resistance even at 400-500μm wet film thickness.
Description
technical field [0001] The invention relates to the field of anti-corrosion coatings, in particular to a preparation method of a water-based acrylic composite metal anti-corrosion coating modified by an isocyanate curing agent. Background technique [0002] For a long time, solvent-based coatings, which contain a large amount of organic solvents, have been commonly used for metal anticorrosion in building steel structures and other fields. The volatilization of organic solvents not only causes waste, seriously pollutes the atmospheric environment, endangers people's health, but also easily leads to flammable, explosive and other accidents. With the limitation of organic solvent emissions (VOC) and the improvement of people's environmental awareness, green and environmentally friendly water-based anti-corrosion coatings have become one of the inevitable trends in the development of metal anti-corrosion in the future. [0003] In western developed countries, water-based coati...
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IPC IPC(8): C09D133/08C09D5/10C09D7/12C08F220/16C08F220/14C08F212/08C08F220/56C08F8/30
Inventor 张瑛胡建坤戴文刚
Owner ZHOUSHAN HENGTAI PAINT IND