Water-based anti-rust primer

Abstract

The invention discloses a water-based anti-rust primer, which is composed of a component A and a component B, wherein the component A consists of the following components by weight percent: 40-55% of water-based acrylic emulsion, 10-20% of anti-rust pigment, 15-30% of extender pigment, 0.5-1% of defoamer, 0.5-1.5% of dispersant, 0.1-0.5% of leveling agent, 0.5-1.5% of substrate wetting agent, 0.1-0.5% of rheological additive, 0.5-2% of anti-flash-rust agent and the balance of deionized water; and the component B is a water-based curing agent. According to the invention, the water-based anti-rust primer for an automobile paint is provided; harmful substances in the water-based anti-rust primer are significantly reduced; benzene, toluene, xylene, ethyl benzene and other harmful substances are not detected in the water-based anti-rust primer; the content of a VOC (volatile organic compound) is significantly reduced and the highest content is only 80 g / L; and the content of free formaldehyde is significantly reduced and the highest content is only 16 mg / kg.

Description

technical field [0001] The invention relates to the technical field of automobile coatings, in particular to a water-based antirust primer. Background technique [0002] Over the past 30 years, my country's automobile industry has developed rapidly, especially in the last 20 years, the automobile industry has shown a blowout rapid growth. In 2009, the total output of automobiles nationwide reached 13.79 million, and the number of automobiles has reached 76.19 million. The great development of the automobile industry has also led to the development of automobile coating technology. At the same time, automobile coatings have also made great progress. [0003] At present, my country's automotive coatings are still dominated by solvent-based systems, which contain a large amount of volatile organic compounds (VOC), which pollute the environment very seriously. Since the 1960s, in order to protect the living environment of human beings, countries around the world have enacted r...

AI Technical Summary

Problems solved by technology

Because large passenger cars, car repair coatings, and plastic parts coatings cannot withstand high-temperature baking, low-temperature drying is generally used, that is, drying at 60-80°C or self-drying at room temperature. Therefore, acrylic polyurethane two-component coatings are usually used at present. For example, domestic buses and coaches are all equipped with solvent-based epoxy antirust paint, solvent-based acrylic polyurethane or polyester polyurethane primer, and solvent-based acrylic polyurethane topcoat. Water-based technology is still blank

Although there are a small number of foreign countries that use water-based technology to paint buses and buses, it is difficult to achieve high-gloss and high-reflection coating effects. Therefore, water-based semi-gloss or matte solid color paint and solvent-based high-solid paint are generally used Varnish varnish supporting coatings, which are still semi-aqueous in nature

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