High-brightness high-hardness water-based acrylic baking varnish and preparation method thereof

Abstract

The invention relates to a high-brightness high-hardness water-based acrylic baking varnish which comprises the following raw materials in percentage by mass: 20-60% of water-based acrylic resin, 5-20% of amino resin, 1-10% of water-based epoxy resin, 0.1-0.5% of leveling agent, 0.1-0.5% of defoaming agent, 0.1-0.5% of foam inhibitor and 20-60% of pure water. The paint film, which is formed by coating the acrylic baking varnish on the metal surface, has the advantages of high hardness, favorable resistance to acid, alkali and salt, environmental protection and high safety. The preparation method of the high-brightness high-hardness water-based acrylic baking varnish comprises the following steps: weighing the materials according to the formula; adding the water-based acrylic resin, amino resin and water-based epoxy resin into a material cylinder, and stirring at 750-850 rpm for 5-15 minutes; shutting off the stirrer, adding the pure water into the material cylinder, and stirring for 5-15 minutes; slowly adding the leveling agent, defoaming agent and foam inhibitor into the material cylinder; and stirring for 5-15 minutes to obtain the finished product. The preparation method has the advantages of simple technique, high yield and high production efficiency, and is easy to operate.

Description

technical field [0001] The invention relates to the technical field of chemical products, in particular to a high-brightness and high-hardness water-based acrylic clear baking varnish and a preparation method thereof. Background technique [0002] Acrylic varnish, also known as acrylic paint, is a kind of paint that needs to be heated to a certain temperature to dry and form a film after being applied on the surface of an object. It is mainly used for the protection of various metal surfaces. [0003] Most of the existing acrylic clear baking varnishes are oily acrylic clear baking varnishes. These oily acrylic clear baking varnishes have a high content of volatile organic compounds (VOC), which are easy to pollute the environment and cause damage to human health. [0004] In response to the above situation, some water-based acrylic clear baking varnishes have appeared on the market. However, the paint film formed by these water-based acrylic clear baking varnishes after cov...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing acrylic clear baking varnishes are oily acrylic clear baking varnishes. The volatile organic content (VOC) in these oily acrylic clear baking varnishes is high, which is easy to pollute the environment and cause damage to human health.

[0004] In response to the above situation, some water-based acrylic clear baking varnishes have appeared on the market. However, the paint film formed by these water-based acrylic clear baking varnishes after covering the metal surface has low brightness, low hardness, poor acid, alkali and salt resistance, and short service life.

The above-mentioned water-based acrylic clear baking paint cannot meet the needs of electrostatic spraying construction, and its application range is narrow; its viscosity is high, its water dilutability is poor, and it is not easy to adjust the construction

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