Fast-curing indentation-proof water-based paint for galvanized sheet and preparation method thereof

Abstract

The invention discloses a fast-curing indentation-proof water-based paint for galvanized sheets. A formula of the paint comprises the following components by weight: 30-45% of water-based resin, 1-3% of a dispersant, 20-35% of a pigment filler, 0.3-1% of a wetting leveling agent, 0.5-1% of a thixotropic agent, 0.3-1% of a defoaming agent, 0.1-0.8% of a flash rust inhibitor, 1-3% of a coalescing agent, 0.1-0.5% of a pH regulator and 10-40% of deionized water. The invention also discloses a preparation method of the water-based paint. The paint film provided by the invention can cure fast, and is safe, energy-saving, environment-friendly and simple for construction, so as to meet the fast production requirements of an assembly line. The obtained galvanized sheet has excellent properties and performance indicators reaching the industrial standard for galvanized sheet coating.

Description

technical field [0001] The invention relates to a water-based paint, in particular to a fast-curing indentation-resistant water-based paint for galvanized sheets. The invention also relates to a method for preparing the coating. Background technique [0002] Galvanizing is an economical and effective steel plate corrosion protection method that is often used. About half of the world's zinc production is used in this process. In order to prevent the surface of the steel plate from being corroded and prolong its service life, a layer of metal zinc is coated on the surface of the steel plate, and the metal zinc on the surface can play a certain anti-corrosion effect. However, the galvanized layer on the surface of ordinary galvanized sheet is very thin, only 40g / m 2 Left and right, it will soon be damaged by corrosion in a relatively serious industrial corrosion environment. For this reason, the surface of galvanized sheet often needs to be coated to achieve anti-corrosion ...

AI Technical Summary

Problems solved by technology

[0007] There are several problems in the above-mentioned common coatings for galvanized sheets: inconvenient construction, high energy consumption, strict requirements on the construction environment, and all of them are solvent-based coatings, VOC emissions are not conducive to the development of green products

However, the galvanized sheet is bulky, and if it is baked at high temperature, the energy cost will be high, and the high temperature in the assembly of the kit may cause the kit to melt and deform, resulting in defective products

Although the water-based two-component system can be cross-linked at low temperature, the reaction speed is slow, and it is inconvenient to use and the cost is high, so it is difficult to adapt to the requirements of the existing fast production line

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