Waterborne scroll-steel coating and preparation method thereof

Abstract

The invention provides a waterborne scroll-steel coating and a preparation method thereof. The waterborne scroll-steel coating is prepared from primer and finish paint, wherein the primer is preparedfrom the following components: water, a dispersant, a wetting agent, epoxy modified acrylic resin, hexamethoxymethyl melamine resin, an acid catalyst, a pigment, a leveling agent, a pH (Potential of Hydrogen) regulator and a co-solvent; the finish paint is prepared from the following components: the water, the dispersant, the wetting agent, polyester modified acrylic resin, the hexamethoxymethyl melamine resin, the acid catalyst, the pigment, the leveling agent, the pH regulator and the co-solvent. The coating provided by the invention has the advantages of high T bending performance, punchingresistance, good post-processing performance, high rigidity, acid and alkali resistance, salt mist resistance, good weather resistance, low VOC (Volatile Organic Compounds), high economic benefits, no toxicity and environment protection.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to a water-based coil coating and a preparation method thereof. Background technique [0002] Coil coatings have been developed since the 1980s. By 2010, the output of coil coatings in my country was 243,300 tons, in 2013 it was 371,800 tons, and in 2015 it was about 480,000 tons. However, these coatings are all oil-based coatings, with a VOC content of about 30%. It is estimated that more than 150,000 tons of VOC (volatile organic compounds) are discharged from coil coatings every year, seriously polluting the environment. So people focus on water-based coil coatings, but due to the water-based process of coil coatings, the flexibility of the coating (that is, the T-bend performance, used to measure the ability of the coating film to resist cracking and damage during the forming process) The project index) is very poor (such as 3T, 4T, and the better performance can only reach 2...

AI Technical Summary

Problems solved by technology

In order to solve the problem that the T-bend performance of the water-based coating is not up to the standard, which affects the post-processing performance of the coil, etc.

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