Water-based decorative paint for metal material and preparation method thereof

Abstract

The invention discloses an water-based decorative paint for a metal material. The water-based decorative paint comprises the following components in part by weight: 40 to 50 percent of aqueous resin, 7 to 10 percent of methylated amino resin, 3 to 5 percent of dispersant, 23 to 28 percent of pigment, 0.5 to 1 percent of wetting levelling agent, 0.5 to 1 percent of thixotropic agent, 0.5 to 1 percent of antifoaming agent, 0.5 to 1 percent of flash corrosion resistor, 5 to 10 percent of film forming auxiliary agent and 10 to 20 percent of deionized water. The invention also discloses a preparation method of the water-based decorative paint. The method comprises the following steps of: (1) weighing each component according to the proportion, adding a part of the water-based resin into an agitating tank, adding the dispersant, adding the pigment with agitating and uniformly dispersing the materials; and (2) grinding the materials uniformly dispersed by step (1), adding the left materials,agitating uniformly, adjusting the pH of the mixture, standing, filtering and packing. The water-based decorative paint provided by the invention has water dilution and is convenient for construction, and the coating has good physical and chemical properties.

Description

technical field [0001] The invention relates to a chemical coating, in particular to a water-based decorative coating for metal materials. The invention also relates to a method for preparing the coating. Background technique [0002] With the continuous improvement of people's awareness of environmental protection and the increasingly stringent environmental regulations, environmentally friendly coatings will become the protagonists of the world coatings market in the 21st century. Due to the high content of organic solvents in solvent-based coatings, it is easy to cause harm to people and the environment during construction and application. It is urgent to transform the coatings industry into a "green industry". As a product of paint, water-based paint has water as its solvent, and there is no hidden danger of flammability and explosion. It has become one of the main directions of paint development because of its safety, non-toxicity, resource conservation, and environmen...

AI Technical Summary

Problems solved by technology

[0003] At present, the relatively mature water-based coating products on the market are only civil architectural coatings, and the water-based coating products in the industrial production range will encounter the following industry problems: 1. The product is very sensitive to temperature and humidity, and some water-based coatings are only suitable for It is used in a dedicated constant temperature and humidity spray booth, and the construction adaptability is poor

2. When the temperature becomes low or the humidity increases significantly, the water is difficult to volatilize, resulting in a significant extension of the construction interval and affecting the progress of the project

3 When encountering the wet-on-wet process, serious sag will occur, and the ideal production efficiency cannot be achieved

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