Water-based anticorrosive paint as well as preparation method and application thereof

Abstract

The invention relates to the technical field of coatings, and particularly discloses a water-based anticorrosive coating as well as a preparation method and application thereof. The water-based anticorrosive paint is a double-component paint composed of a component A and a component B, wherein the component A is prepared from the following raw materials in parts by weight: 40-70 parts of water-based PVDC resin emulsion, 20-40 parts of pigment filler, 0.5-10 parts of an auxiliary agent, 1-5 parts of a cosolvent and 1-10 parts of deionized water; the component B is prepared from the following raw materials in parts by weight: 60-80 parts of a melamine resin curing agent and 20-40 parts of deionized water. According to the anticorrosive paint, the raw materials are environmentally friendly and free of pollution, the VOC emission amount in the film coating process is low, the requirement for a low-temperature baking field coating technology can be met, the anticorrosive paint is applied to the surface of the steel cylinder, the film coating adhesive force is high, the pencil hardness is high, and excellent water resistance and salt fog resistance are achieved.

Description

technical field [0001] This application relates to the technical field of coatings, more specifically, it relates to a water-based anti-corrosion coating and its preparation method and application. Background technique [0002] At present, the anti-corrosion coatings on the surface of refrigerant storage cylinders usually use solvent-based coatings, such as alkyd polyurethane coatings and acrylic polyurethane coatings. In order to improve the curing speed of the coating, the steel cylinder coating process generally adopts the process of electrostatic spraying on mobile guide rails and baking at low temperature (80-90°C) for 20-30 minutes to coat the steel cylinders. In order to meet the requirements of the electrostatic spraying line in the processing plant, When using paint, a large amount of diluent needs to be added, which increases the emission of VOC content (above 800g / L) when the paint product is used, especially during the baking process of coating film preparation, ...

AI Technical Summary

Problems solved by technology

In order to improve the curing speed of the coating, the steel cylinder coating process generally adopts the process of electrostatic spraying on mobile guide rails and baking at low temperature (80-90°C) for 20-30 minutes to coat the steel cylinders. In order to meet the requirements of the electrostatic spraying line in the processing plant, When using paint, a large amount of diluent needs to be added, which increases the emission of VOC content (above 800g / L) when the paint product is used, especially during the baking process of coating film preparation, it is easier to aggravate the emission of VOC, which is harmful to the workers in the factory and the surrounding area. The ecological environment has caused great harm, and if it is not energy-saving and environmentally friendly, it will gradually be eliminated by the market

[0003] Therefore, it is usually necessary to choose a water-based anti-corrosion coating suitable for electrostatic spraying of mobile guide rails, such as water-based alkyd amino coatings and water-based acrylic amino coatings. However, the above two water-based coatings cannot meet the on-site coating process of low-temperature baking. And the coating film generally has the problem of non-drying and stickiness. Therefore, it is necessary to develop a coating suitable for low-temperature baking on-site coating process and good film-forming performance.

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