Preparation method of isocyanate curing agent-modified water-based acrylate composite metal anticorrosive paint

A water-based acrylic and isocyanate technology, used in 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: 2014-09-03
ZHOUSHAN HENGTAI PAINT IND
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[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

Method used

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  • Preparation method of isocyanate curing agent-modified water-based acrylate composite metal anticorrosive paint
  • Preparation method of isocyanate curing agent-modified water-based acrylate composite metal anticorrosive paint
  • Preparation method of isocyanate curing agent-modified water-based acrylate composite metal anticorrosive paint

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Embodiment Construction

[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, 2g of TX- 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 10 g of HDI trimer, react for 0.5 h, and prepare a water-based acrylic resin emulsion modified by an isocyanate curing agent;

[0021] (2) Preparation o...

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Abstract

The invention discloses a preparation method of an isocyanate curing agent-modified water-based acrylate composite metal anticorrosive paint. According to the preparation method, the water-based acrylate composite metal anticorrosive paint can be matched with water-based epoxy or acrylic primer and intermediate coat and also can be applied to a solvent type paint to form a crossed composite type paint anticorrosive system in a single-component or dual-component manner; isocyanate curing agent-modified acrylic resin is adopted to form a crossed netty structure; the density of the paint is improved, the film-forming temperature of the paint is reduced, thus the construction is facilitated; an activated carbon-based powder reducing auxiliary is adopted to be matched up with a zinc-containing compound to realize relatively strong reducibility, the anticorrosive effect of the water-based paint (especially to steel components) is greatly improved, and good construction performance is displayed in the construction process; compared with a traditional alcohol acid system, the preparation method has the advantages that little dry dust is generated, good surface sagging resistance can be displayed when the wet film thickness is 400-500 microns.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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
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